Efficient submersible pump

Abstract

The utility model provides an efficient submersible pump and belongs to the field of submersible pumps. The problem that the joint of an existing submersible pump and a pipe fitting is prone to loosening and leakage is solved. The efficient submersible pump comprises a pump body with a water outlet port, a water outlet pipe is vertically and fixedly arranged at the water outlet port of the pump body and used for being connected with a pipe fitting, a connecting flange is arranged outside the pump body, a connecting structure is arranged between the water outlet pipe and the pipe fitting, and the connecting structure comprises a water outlet section, a sealing part, a plurality of sealing rings, a stepped shaft hole, a wear-resisting bush and a sealing piece. The sealing rings are movably embedded into the outer portion of the sealing part and sequentially distributed at intervals in the axial direction of the sealing part, the multiple sealing rings are connected with the inner wall of the abrasion-resistant bush in a rolling fit mode, and every two adjacent sealing rings are matched with the inner wall of the abrasion-resistant bush to form a plurality of sealing ring cavities. According to the utility model, the problems of leakage and loosening are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of submersible pumps, and relates to a submersible pump, and particularly to a high-efficiency submersible pump. Background Technology

[0002] Submersible pumps are essential equipment for deep well water extraction. During operation, the entire unit is submerged in water to extract groundwater to the surface. They are suitable for various applications including domestic water supply, mine rescue, industrial cooling, farmland irrigation, seawater lifting, and ship ballast adjustment.

[0003] During operation, existing submersible pumps experience excessive centrifugal pressure inside the pump body, causing water to flow out at a high speed. This high flow velocity results in significant water pressure and impact, making the connection between the submersible pump and pipe fittings prone to breakage and wear. This severely impacts the efficiency of the submersible pump and leads to high losses. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a high-efficiency submersible pump.

[0005] The purpose of this utility model can be achieved through the following technical solution: A high-efficiency submersible pump includes a pump body with a water outlet port, a water outlet pipe is vertically fixed at the water outlet port of the pump body, the water outlet pipe is used to connect pipe fittings, and a connecting flange is provided on the outside of the pump body for auxiliary fixing of the water outlet pipe. The feature is that a connecting structure is provided between the water outlet pipe and the pipe fittings to improve the connection sealing strength between the two.

[0006] The connection structure includes a water outlet section fixed at the water outlet pipe port, a sealing part provided on the water outlet section and extending axially outward, multiple movable sealing rings, a stepped shaft hole provided inside the pipe port and adapted to connect with the water outlet section, a wear-resistant bushing provided between the sealing part and the stepped shaft hole, and a sealing element sleeved on the outside of the sealing part.

[0007] The sealing rings are movably embedded into the outside of the sealing part and are arranged at intervals along the axial direction of the sealing part;

[0008] The plurality of sealing rings are rolled and fitted to the inner wall of the wear-resistant bushing, and two adjacent sealing rings cooperate with the inner wall of the wear-resistant bushing to form a plurality of sealing ring cavities.

[0009] The water outlet section is connected to the stepped shaft hole by internal and external thread fitting, and its sealing element forms a compression seal with the stepped shaft hole.

[0010] In the aforementioned high-efficiency submersible pump, the outlet section and the sealing part are integrally formed, and the cross-section is designed in a T-shape.

[0011] In the aforementioned high-efficiency submersible pump, the end face of the sealing element has multiple connecting protrusions extending axially outward, and the end face of the water outlet section has multiple mating grooves that are adapted to the connecting protrusions. The structure of the connecting protrusions and mating grooves can prevent radial displacement of the sealing element and improve the sealing performance.

[0012] In the aforementioned high-efficiency submersible pump, the connecting protrusion of the seal has a trapezoidal cross-section, and the inclination angle of the sidewall of the mating groove matches that of the connecting protrusion, with an inclination angle of 5°~10°.

[0013] In the aforementioned high-efficiency submersible pump, the number of sealing rings is 3-5, and the cross-section of each sealing ring is circular, with its outer diameter fitting with the inner wall of the wear-resistant bushing with a clearance value not exceeding 0.1mm.

[0014] In the aforementioned high-efficiency submersible pump, the internal thread end of the stepped shaft hole is provided with an annular locking groove, and an elastic C-shaped retaining ring is assembled in the locking groove. When the water outlet section is screwed into the limit position, the end of the water outlet section presses against the C-shaped retaining ring to cause it to expand radially.

[0015] Compared with existing technologies, this high-efficiency submersible pump solves the leakage and loosening problems under high vibration and water pressure fluctuation conditions by innovating the rolling sealing ring cavity and extrusion seal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection structure of this high-efficiency submersible pump.

[0017] Figure 2 This is a three-dimensional structural diagram of this high-efficiency submersible pump.

[0018] Figure 3 This is a partial cross-sectional schematic diagram of this high-efficiency submersible pump.

[0019] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0020] In the diagram, 1. Pump body; 2. Outlet pipe; 3. Connecting flange; 4. Outlet joint; 5. Sealing part; 6. Sealing ring; 7. Stepped shaft hole; 8. Wear-resistant bushing; 9. Seal; 10. Sealing ring cavity; 11. Connecting protrusion; 12. Mating groove; 13. Pipe fitting. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this high-efficiency submersible pump includes a pump body 1 with a water outlet port. A water outlet pipe 2 is vertically fixed at the water outlet port of the pump body 1. The water outlet pipe 2 is used for connecting fittings. A connecting flange 3 is provided on the outside of the pump body 1 to assist in fixing the water outlet pipe 2. A connecting structure is provided between the water outlet pipe 2 and the fitting 13 to improve the connection sealing strength between the two. The connecting structure includes a water outlet section 4 fixed at the water outlet port of the water outlet pipe 2, a sealing part 5 provided on the water outlet section 4 and extending axially outward, and multiple movable sealing rings 6. The system includes a stepped shaft hole 7 located inside the port of pipe fitting 13 and adapted to connect with the outlet section 4; a wear-resistant bushing 8 located between the sealing part 5 and the stepped shaft hole 7; and a sealing element 9 fitted onto the outside of the sealing part 5. Sealing rings 6 are movably embedded into the outside of the sealing part 5 and are arranged sequentially at intervals along the axial direction of the sealing part 5. Multiple sealing rings 6 are rolled into contact with the inner wall of the wear-resistant bushing 8, and two adjacent sealing rings 6 cooperate with the inner wall of the wear-resistant bushing 8 to form multiple sealing ring cavities 10. The outlet section 4 and the stepped shaft hole 7 are connected by internal and external threads, and the sealing element 9 forms a compression seal with the stepped shaft hole 7. The outlet section 4 and the sealing part 5 are integrally formed and have a T-shaped cross-section. Multiple connecting protrusions 11 extend axially outward from the end face of the seal 9. Multiple mating grooves 12, adapted to the connecting protrusions 11, are provided on the end face of the water outlet section 4. The structure of the connecting protrusions 11 and the mating grooves 12 prevents radial displacement of the seal 9 and improves sealing performance. The connecting protrusions 11 of the seal 9 have a trapezoidal cross-section, and the sidewall inclination angle of the mating grooves 12 matches that of the connecting protrusions 11, with an inclination angle of 5°~10°. There are 3-5 sealing rings 6, each with a circular cross-section. The outer diameter of each sealing ring 6 is clearance-fitted with the inner wall of the wear-resistant bushing 8, with a clearance value not exceeding 0.1mm. An annular locking groove is provided at the end of the internal thread of the stepped shaft hole 7. An elastic C-shaped retaining ring is fitted inside the locking groove. When the water outlet section 4 is screwed into its limit position, the end of the water outlet section 4 presses against the C-shaped retaining ring, causing it to expand radially.

[0023] By innovating the rolling sealing ring cavity 10 and the extrusion seal 9, the leakage and loosening problems of submersible pumps under high vibration and water pressure fluctuation conditions are solved.

[0024] Working principle

[0025] The mechanical connection between the pipe fitting 13 and the water outlet pipe 2 is achieved through the threaded engagement of the water outlet joint 4 and the stepped shaft hole 7, providing axial locking force. The sealing ring 6 rolls against the wear-resistant bushing 8, with multiple sealing rings 6 embedded on the outside of the sealing part 5, forming rolling friction (non-sliding friction) with the inner wall of the wear-resistant bushing 8 under axial pressure, reducing wear. Adjacent sealing rings 6 and the inner wall of the wear-resistant bushing 8 enclose a stepped sealing ring cavity 10. When fluid passes through, local vortices are formed within the cavity, gradually reducing pressure fluctuations and suppressing leakage. When the thread is tightened, the sealing element 9 is pressed against the end face of the stepped shaft hole 7, filling microscopic gaps through elastic deformation. The trapezoidal connecting protrusion 11 of the sealing element 9 engages with the mating groove 12 of the water outlet joint 4, preventing radial displacement and ensuring uniform compression. When the water outlet joint 4 is screwed into its limit position, its end compresses the C-shaped retaining ring, causing it to expand radially and engage with the annular locking groove of the stepped shaft hole 7, forming a mechanical interlock to prevent thread retraction caused by vibration.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A high-efficiency submersible pump, comprising a pump body (1) with a water outlet port, wherein a water outlet pipe (2) is vertically fixed at the water outlet port of the pump body (1), the water outlet pipe (2) is used for connecting pipe fittings, and a connecting flange (3) is provided on the outside of the pump body (1) for auxiliary fixing of the water outlet pipe (2), characterized in that, A connection structure is provided between the water outlet pipe (2) and the pipe fitting (13) to improve the connection sealing strength between the two; The connection structure includes an outlet section (4) fixed at the outlet pipe (2) port, a sealing part (5) provided on the outlet section (4) and extending axially outward, a plurality of movable sealing rings (6), a stepped shaft hole (7) provided inside the pipe fitting (13) port and adapted to the outlet section (4), a wear-resistant bushing (8) provided between the sealing part (5) and the stepped shaft hole (7), and a sealing element (9) sleeved on the outside of the sealing part (5); The sealing ring (6) is movably embedded into the outside of the sealing part (5) and is arranged in a series of intervals along the axial direction of the sealing part (5); The plurality of sealing rings (6) are rolled and fitted to the inner wall of the wear-resistant bushing (8), and two adjacent sealing rings (6) cooperate with the inner wall of the wear-resistant bushing (8) to form a plurality of sealing ring cavities (10). The water outlet section (4) and the stepped shaft hole (7) are connected by internal and external threads, and the sealing element (9) and the stepped shaft hole (7) form a compression seal.

2. The high-efficiency submersible pump according to claim 1, characterized in that, The water outlet section (4) and the sealing part (5) are integrally formed and have a T-shaped cross-section.

3. The high-efficiency submersible pump according to claim 1, characterized in that, The sealing element (9) has multiple connecting protrusions (11) extending outward axially from its end face. The water outlet section (4) has multiple mating grooves (12) that are compatible with the connecting protrusions (11). The structure of the connecting protrusions (11) and the mating grooves (12) can prevent the sealing element (9) from radial displacement and improve the sealing performance.

4. The high-efficiency submersible pump according to claim 1, characterized in that, The connecting protrusion (11) of the seal (9) has a trapezoidal cross section, and the side wall inclination angle of the mating groove (12) matches that of the connecting protrusion (11), with an inclination angle of 5°~10°.

5. A high-efficiency submersible pump according to claim 1, characterized in that, The number of sealing rings (6) is 3-5, and the cross-section of each sealing ring (6) is circular, and its outer diameter is in clearance fit with the inner wall of the wear-resistant bushing (8), with a clearance value not greater than 0.1mm.

6. A high-efficiency submersible pump according to claim 1, characterized in that, The internal thread end of the stepped shaft hole (7) is provided with an annular locking groove, and an elastic C-shaped retaining ring is assembled in the locking groove. When the water outlet section (4) is screwed into the limit position, the end of the water outlet section (4) presses the C-shaped retaining ring to make it expand radially.

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