Double-suction type large-flow anti-backflushing submersible electric pump

Abstract

The utility model provides a double-suction type large-flow anti-backflushing submersible electric pump which comprises a main machine, a rotating shaft and an impeller, the main machine is provided with a connecting chamber, the rotating shaft is rotatably connected to the main machine, the impeller is rotatably connected to the interior of the connecting chamber and connected with the rotating shaft, the main machine is provided with a water inlet hole and a water outlet hole, and the water inlet hole is communicated with the water outlet hole. The impeller is provided with a water inlet hole and a water outlet hole, the water inlet hole and the water outlet hole are both communicated with the connecting chamber, the main machine is provided with a side hole, the side hole is communicated with the connecting chamber, when the impeller rotates, liquid is sucked into the connecting chamber from the water inlet hole and the side hole and then guided out from the water outlet hole, and the purpose that sealing is not prone to failure is achieved.

Description

Technical Field

[0001] The utility model relates to a double-suction large-flow anti-backwash submersible electric pump. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN215860828U discloses a submersible pump, including a submersible pump body, the submersible pump body including an inlet impeller, the inlet impeller is arranged inside the liquid inlet of the submersible pump body, the submersible pump body near one end of the inlet impeller is provided with a pump base in the shape of a trumpet opening, a circular tube is fixed to the outer ring of the liquid inlet of the submersible pump body, a feed wire interface is provided on one side of the circular tube, the feed wire interface is connected to one end of the feed pipe; a plurality of discharge holes are opened on the circular tube.

[0003] When completing the normal pumping work, other substances can also be added to the material to be pumped to meet other needs such as preventing the occurrence of gas turbidity.

[0004] Typically, a motor is installed within the submersible pump body, with the motor's rotating shaft fixedly connected to the inlet impeller. An oil seal is installed between the submersible pump body and the rotating shaft. However, in actual use, when the motor within the submersible pump body stops working, the inlet impeller stops rotating, and water rushes into the inlet impeller from the outlet pipe. Since water is already in the liquid inlet, most of the water will rush into the submersible pump body, easily causing the seal between the rotating shaft and the submersible pump body to fail. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a double-suction large-flow anti-backwash submersible electric pump to achieve the purpose of making the seal less likely to fail.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a double-suction large-flow anti-backwash submersible electric pump, including a main unit, a rotating shaft, and an impeller. The main unit is provided with a connecting chamber, the rotating shaft is rotatably connected to the main unit, the impeller is rotatably connected in the connecting chamber and is connected to the rotating shaft, the main unit is provided with a water inlet hole and a water outlet hole, the water inlet hole and the water outlet hole are both connected to the connecting chamber, the main unit is provided with a side hole, the side hole is connected to the connecting chamber, and when the impeller rotates, the liquid is sucked into the connecting chamber from the water inlet hole and the side hole and then discharged from the water outlet hole.

[0007] To implement the above technical solution, when the rotating shaft drives the impeller to rotate, the liquid can enter the connecting chamber from the water inlet hole and the side hole at the same time, so that the rotating shaft has no axial tension, the radial force is reduced and balanced, the pump efficiency is improved, the service life of the pump is increased, and the liquid is discharged from the water outlet hole; when the rotating shaft stops rotating, the liquid is poured into the connecting chamber from the water outlet hole, part of the liquid is discharged from the water inlet hole, and the other part is discharged from the side hole, thereby greatly reducing the impact on the mechanical seal, thereby achieving the purpose of making the seal not easily damaged.

[0008] As a preferred solution of the present invention, the main unit includes a main body, a water inlet joint, and a water outlet pipe. One side of the water inlet joint is fixedly connected to the main body, and the other side is fixedly connected to the water outlet pipe. The side hole is opened on the water inlet joint, and the connecting chamber, water inlet hole, and water outlet hole are opened on the water outlet pipe. The water inlet joint is provided with a connecting hole connecting the side hole and the connecting chamber.

[0009] By implementing the above technical solution, the water inlet section and the water outlet pipe can be detachably installed, thereby reducing maintenance costs and production costs.

[0010] As a preferred solution of the present invention, a guiding slope is provided on the water inlet joint, one end of the guiding slope is close to the connecting hole, and the other end is close to the side hole.

[0011] By implementing the above technical solution, after the liquid flows back into the connecting chamber, a part of the liquid enters the water inlet section from the connecting hole, and can then be quickly discharged from the side hole along the guiding slope, thereby achieving the effect of rapid liquid discharge and further reducing the impact on the mechanical seal.

[0012] As a preferred solution of the present invention, a conductive arc surface is provided on the impeller, one of the conductive arc surfaces faces the connecting hole, and the other conductive arc surface faces the water inlet hole.

[0013] To implement the above technical solution, the liquid moves from the water outlet hole toward the connecting chamber. Through the guidance of the conductive arc surface, the liquid can be conducted to the water inlet hole and the connecting hole, so as to be quickly discharged from the connecting chamber, further reducing the impact on the mechanical seal.

[0014] As a preferred solution of the present invention, a lower filter screen is fixed on the water outlet pipe, and the lower filter screen is arranged opposite to the water inlet hole.

[0015] By implementing the above technical solution, the lower filter can filter out debris, making it difficult for the debris to enter the connection chamber.

[0016] As a preferred solution of the present invention, the water inlet section is connected to a middle filter screen, and the side holes are located inside the middle filter screen.

[0017] By implementing the above technical solution, the middle filter can filter out debris, making it difficult for the debris to enter the connection chamber.

[0018] As a preferred solution of the present invention, a water-guiding arc surface and a water-guiding slope are provided on the inner wall of the water outlet pipe, the water-guiding arc surface and the water-guiding slope are arranged opposite to each other, and the water-guiding arc surface and the water-guiding slope are provided at the bend of the water outlet pipe.

[0019] To implement the above technical solution, when the liquid enters the connecting chamber from the water outlet pipe, the liquid is conducted along the water-guiding arc surface to the water-guiding slope, and then quickly enters the connecting chamber along the water-guiding slope, thereby making the liquid flow smoother.

[0020] As a preferred solution of the present invention, a first sealing ring is provided between the water inlet joint and the main body, a limiting ring is provided on the water inlet joint, a second sealing ring is provided between the water outlet pipe and the water inlet joint, and the second sealing ring is close to the end of the limiting ring.

[0021] To implement the above technical solution, the first sealing ring improves the sealing between the water inlet joint and the main body, and the second sealing ring improves the sealing between the water inlet joint and the water outlet pipe.

[0022] As a preferred solution of the present invention, the end of the water outlet pipe away from the water inlet section is connected to a positioning pipe, and a plurality of positioning inclined surfaces are provided on the outer wall of the positioning pipe. The plurality of positioning inclined surfaces are arranged along the length direction of the positioning pipe and form a serrated shape.

[0023] To implement the above technical solution, the water pipe is sleeved on the positioning pipe, and the positioning inclined surface is provided to prevent the water pipe from being easily removed from the positioning pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an embodiment;

[0025] Figure 2 A schematic diagram showing the structure of the impeller.

[0026] Figure numerals: 1. Main unit; 11. Main body; 12. Water inlet section; 121. Guide slope; 13. Water outlet pipe; 21. First sealing ring; 22. Second sealing ring; 23. Limiting ring; 31. Side hole; 32. Connecting hole; 33. Connecting chamber; 34. Water inlet hole; 35. Water outlet hole; 4. Rotating shaft; 5. Impeller; 51. Conducting arc surface; 61. Water guide arc surface; 62. Water guide slope; 7. Positioning tube; 71. Positioning slope; 81. Lower filter screen; 82. Middle filter screen; 9. Oil seal. DETAILED DESCRIPTION

[0027] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0028] A double-suction, high-flow, backwash-proof submersible electric pump comprises a main unit 1, a rotating shaft 4, and an impeller 5. From top to bottom, the main unit 1 comprises a main body 11, a water inlet section 12, and a water outlet pipe 13. The water inlet section 12 is fixedly connected to the main body 11 on one side by bolts, and to the water outlet pipe 13 on the other side by bolts. To improve sealing, a first sealing ring 21 is provided between the water inlet section 12 and the main body 11. A limit ring 23 is provided on the water inlet section 12, and a second sealing ring 22 is provided between the water outlet pipe 13 and the water inlet section 12, with the second sealing ring 22 located near the end of the limit ring 23.

[0029] A side hole 31 is formed in the water inlet section 12; a connecting chamber 33, a water inlet hole 34, and a water outlet hole 35 are formed in the water outlet pipe 13. A connecting hole 32 is formed in the water inlet section 12, connecting the side hole 31 and the connecting chamber 33. The rotating shaft 4 is rotatably connected to the main body 11. The main body 11 contains a motor, which activates the motor to rotate the rotating shaft 4. An oil seal 9 is installed between the rotating shaft 4 and the main body 11.

[0030] The impeller 5 is fixed to the lower end of the rotating shaft 4 and is coaxially arranged with the rotating shaft 4 ; the impeller 5 is located in the connecting chamber 33 .

[0031] The connecting hole 32 and the water inlet hole 34 are respectively located at the upper and lower ends of the impeller 5 ; the water outlet hole 35 is located at one side of the impeller 5 .

[0032] The impeller 5 adopts a double water inlet structure.

[0033] The motor drives the rotating shaft 4 to rotate, and the impeller 5 rotates synchronously with the rotating shaft 4. The liquid is sucked into the connecting chamber 33 from the water inlet 34 and the side hole 31 and then discharged from the water outlet 35. The liquid is water.

[0034] Because the upper and lower ends of the impeller 5 absorb water simultaneously, the motor is free of axial tension. This dual-channel structure reduces radial forces, effectively improving the efficiency of the electric pump and extending its service life. It not only has the functions of a submersible electric pump but also has the special performance of a double-suction pump with high efficiency and stable operation.

[0035] When the motor stops working, water flows back from the water outlet pipe 13 into the connecting chamber 33, part of which is discharged from the water inlet hole 34, and the other part passes through the connecting hole 32 and is discharged from the side hole 31, thereby avoiding water pressure impact on the mechanical seal and making it difficult for water to enter the main body 11.

[0036] In order to improve the efficiency of water being drawn out from the side hole 31 , a guide slope 121 is provided on the water inlet joint 12 . One end of the guide slope 121 is close to the connecting hole 32 , and the other end is close to the side hole 31 .

[0037] The impeller 5 has two conductive cambered surfaces 51, one facing the connecting hole 32 and the other facing the water inlet 34. The axis of the outlet pipe 13 passes between the two conductive cambered surfaces 51. As water flows from the outlet pipe 13 into the connecting chamber 33, the conductive cambered surfaces 51 allow the water to be quickly discharged from the water inlet 34 and the connecting hole 32, further increasing the water flow rate.

[0038] The inner wall of the water outlet pipe 13 is provided with a water-guiding curved surface 61 and a water-guiding inclined surface 62, which are arranged opposite each other and are located at the bend of the water outlet pipe 13. A positioning pipe 7 is connected to the end of the water outlet pipe 13 away from the water inlet node 12. The outer wall of the positioning pipe 7 is provided with multiple positioning inclined surfaces 71, which are arranged along the length of the positioning pipe 7 and form a serrated pattern. When the water pipe is sleeved onto the positioning pipe 7, the positioning inclined surfaces 71 prevent it from falling off, making the connection between the water pipe and the positioning pipe 7 more stable.

[0039] A lower filter screen 81 is fixed on the water outlet pipe 13 and is arranged opposite to the water inlet hole 34. A middle filter screen 82 is connected to the water inlet section 12, and the side hole 31 is located inside the middle filter screen 82.

[0040] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A double-suction, high-flow, backwash-proof submersible electric pump, comprising a main unit (1), a rotating shaft (4), and an impeller (5), wherein the main unit (1) is provided with a connecting chamber (33), the rotating shaft (4) is rotatably connected to the main unit (1), the impeller (5) is rotatably connected in the connecting chamber (33) and is connected to the rotating shaft (4), the main unit (1) is provided with a water inlet (34) and a water outlet (35), the water inlet (34) and the water outlet (35) are both connected to the connecting chamber (33), and the pump is characterized in that: The main unit (1) is provided with a side hole (31), which is connected to a connecting chamber (33). When the impeller (5) rotates, liquid is sucked into the connecting chamber (33) from the water inlet hole (34) and the side hole (31) and then discharged from the water outlet hole (35).

2. A double-suction, high-flow, anti-backlash submersible electric pump according to claim 1, characterized in that: The main unit (1) comprises a main body (11), a water inlet section (12), and a water outlet pipe (13). One side of the water inlet section (12) is fixedly connected to the main body (11), and the other side is fixedly connected to the water outlet pipe (13). The side hole (31) is provided on the water inlet section (12). The connecting chamber (33), the water inlet hole (34), and the water outlet hole (35) are provided on the water outlet pipe (13). The water inlet section (12) is provided with a connecting hole (32) communicating with the side hole (31) and the connecting chamber (33).

3. A double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: The water inlet joint (12) is provided with a guiding inclined surface (121), one end of the guiding inclined surface (121) is close to the connecting hole (32), and the other end is close to the side hole (31).

4. A double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: The impeller (5) is provided with a conductive arc surface (51), one of the conductive arc surfaces (51) faces the connecting hole (32), and the other conductive arc surface (51) faces the water inlet hole (34).

5. The double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: A lower filter screen (81) is fixed on the water outlet pipe (13), and the lower filter screen (81) is arranged opposite to the water inlet hole (34).

6. The double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: The water inlet section (12) is connected to a middle filter screen (82), and the side hole (31) is located inside the middle filter screen (82).

7. The double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: A water-guiding arc surface (61) and a water-guiding inclined surface (62) are provided on the inner wall of the water outlet pipe (13). The water-guiding arc surface (61) and the water-guiding inclined surface (62) are arranged opposite to each other. The water-guiding arc surface (61) and the water-guiding inclined surface (62) are provided at the bend of the water outlet pipe (13).

8. The double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: A first sealing ring (21) is provided between the water inlet joint (12) and the main body (11), a limiting ring (23) is provided on the water inlet joint (12), a second sealing ring (22) is provided between the water outlet pipe (13) and the water inlet joint (12), and the second sealing ring (22) is close to the end of the limiting ring (23).

9. The double-suction, high-flow, anti-backlash submersible electric pump according to claim 2, characterized in that: One end of the water outlet pipe (13) away from the water inlet joint (12) is connected to a positioning pipe (7), and a plurality of positioning inclined surfaces (71) are provided on the outer wall of the positioning pipe (7). The plurality of positioning inclined surfaces (71) are arranged along the length direction of the positioning pipe (7) and form a serrated shape.

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