Small impeller submersible pump

Abstract

The small impeller submersible pump comprises a machine body, the machine body is sleeved with an annular plate, a shell is fixedly connected to the lower portion of the annular plate, and a drainage cavity and a water inlet cavity are sequentially formed in the shell from top to bottom; an impeller body is arranged in the drainage cavity, and the side face of the drainage cavity communicates with a water outlet. The bottom of the water inlet cavity is a sealing plate, a filtering frame with micropores in the surface is arranged on the side face of the water inlet cavity, and a filtering and cleaning mechanism is assembled in the water inlet cavity. The filtering and sweeping mechanism is driven to act through rotating power of the impeller body, reciprocating rotating sweeping of the sweeping brush on the inner surface of the filtering frame is achieved, impurities on the filtering frame can be automatically removed without an additional power source, micropores of the filtering frame are effectively prevented from being blocked, the working stability and water inlet efficiency of the submersible pump are improved, and the service life of the submersible pump is prolonged. And the overall structure is compact, and the use requirements of small submersible pumps are met.

Description

Technical Field

[0001] This invention belongs to the field of submersible pump technology, specifically a small impeller submersible pump. Background Technology

[0002] A submersible pump is a device that submerges its body in water to pump water, and it is widely used in agricultural irrigation, yard drainage, aquaculture, and other scenarios. Among them, small impeller submersible pumps are particularly widely used in home and small-scale operation scenarios due to their advantages such as small size, easy installation, and low energy consumption.

[0003] However, existing small impeller submersible pumps have significant technical drawbacks during use. To prevent impurities in the water from entering the pump body and causing impeller wear or blockage, a filter structure is typically installed at the inlet. However, after prolonged use, the filter pores are easily clogged by weeds, silt, fibers, and other impurities, leading to a decrease in water flow, reduced drainage efficiency, and even overheating due to insufficient water intake, potentially damaging the motor. Current solutions mostly involve manual periodic disassembly and cleaning of the filter structure, which is not only cumbersome, time-consuming, and labor-intensive, but also directly affects the normal operation of the submersible pump if cleaning is not timely, and in severe cases, can shorten the equipment's lifespan.

[0004] In view of the shortcomings of the existing technology, there is an urgent need for a small impeller submersible pump that can automatically clean impurities from the filter structure and prevent clogging, so as to improve the working stability and practicality of the equipment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing small impeller submersible pumps, such as easy clogging of the filter structure and the need for manual cleaning, and to provide a small impeller submersible pump that integrates an automatic filter cleaning mechanism to achieve automatic cleaning of the filter frame without the need for an additional power source, effectively preventing filter clogging and improving equipment efficiency and service life.

[0006] A small impeller submersible pump includes a body, an annular plate is sleeved on the outside of the body, a housing is provided below the annular plate, and a drain chamber and a water inlet chamber are provided inside the housing from top to bottom.

[0007] The drainage chamber is equipped with an impeller body inside, and the side of the drainage chamber is connected to the water outlet.

[0008] The water inlet chamber is equipped with a filtration and cleaning mechanism inside, the bottom of the water inlet chamber is a closed plate, and the side of the water inlet chamber is equipped with a filter frame with micropores on the surface.

[0009] The filter cleaning mechanism includes a reciprocating lead screw, a rotating shaft, a limiting rod, a U-shaped block, a moving plate, and a cleaning brush;

[0010] The bottom of the reciprocating screw is fixedly connected to the upper surface of the closed plate, and the movable plate is sleeved on the reciprocating screw by means of threaded connection. The two ends of the movable plate are provided with cleaning brushes that are adapted to the inner surface of the filter frame.

[0011] The rotating shaft is connected to the impeller body via a speed reduction device. A U-shaped block is fixedly connected to the lower surface of the rotating shaft. Limiting rods are fixedly provided at both ends of the U-shaped block. The limiting rods pass through the moving plate and extend to the upper surface of the closing plate, and there is a gap between the lowest end of the limiting rod and the closing plate.

[0012] Furthermore, the aforementioned deceleration device is a magnetic deceleration device, and the deceleration ratio of the magnetic deceleration device is 1:10 to 1:100. The function of the magnetic decelerator is to avoid the sealing leakage problem of traditional mechanical deceleration devices through non-contact magnetic transmission, making it suitable for the underwater working environment of submersible pumps. Moreover, this deceleration ratio range can convert the high-speed rotation of the impeller into the low-speed rotation required by the cleaning mechanism, ensuring that the cleaning brush has sufficient cleaning torque to remove stubborn impurities, while avoiding excessive wear of the brush bristles or splashing of impurities due to excessive rotation speed, thus achieving a balance between cleaning effect and component life.

[0013] Furthermore, the magnetic reduction device is a two-stage magnetic control reduction device, which includes a rotation input end and a rotation output end. The rotation input end is fixedly connected to the impeller body, and the rotation output end is fixedly connected to the rotating shaft. Compared with single-stage reduction, the two-stage reduction structure provides smoother transmission and a higher reduction ratio, ensuring that the impeller's power is transmitted to the rotating shaft and avoiding slippage or speed fluctuations during transmission. This, in turn, ensures the stability of the filter cleaning mechanism and the regularity of its cleaning actions.

[0014] Furthermore, the filter frame is fixedly connected to the inner wall of the housing via a ring-shaped array of positioning bolts. The positioning bolts are threaded through the edge of the filter frame and extend into pre-drilled threaded holes in the inner wall of the housing. The ring-shaped array distribution ensures uniform force distribution on the filter frame, resulting in a stable structure after fixing. This resists the impact of underwater water flow and the lateral forces exerted by the cleaning mechanism, preventing the filter frame from shifting or loosening. Simultaneously, the detachable threaded connection facilitates subsequent disassembly, cleaning, maintenance, or replacement of the filter frame, enhancing the practicality of the equipment.

[0015] Furthermore, two cleaning brushes are provided, each fixedly connected to both sides of the movable plate, with the bristles of the cleaning brushes in close contact with the inner wall of the filter frame. The dual-sided cleaning brushes achieve comprehensive cleaning of the inner surface of the filter frame, eliminating any blind spots. The close contact design between the bristles and the inner wall of the filter frame ensures that the bristles fully contact and remove impurities, preventing residue buildup that could clog the micropores of the filter frame. This ensures a stable water flow rate into the inlet chamber and maintains the drainage efficiency of the submersible pump.

[0016] Furthermore, there are two limiting rods, which are symmetrically fixedly connected to both sides below the U-shaped block. The moving plate has limiting holes that match the limiting rods, and the limiting rods pass through the limiting holes and slide in contact with them. The two symmetrically arranged limiting rods provide balanced support and transmission force to the moving plate, preventing it from tilting, shifting, or jamming during rotation and vertical movement.

[0017] Furthermore, the diameter of the limiting hole is larger than the outer diameter of the limiting rod, and the diameter difference is 0.1-0.5mm. This avoids jamming caused by machining errors or slight underwater deformation, ensuring the flexibility of the moving plate's reciprocating movement, controlling the swaying of the moving plate caused by excessive gaps, ensuring precise and effective rotational transmission of the limiting rod to the moving plate, and reducing frictional loss during relative movement, thus extending the service life of the components.

[0018] Furthermore, the gap between the lowest end of the limiting rod and the sealing plate is 5-15mm. This gap effectively prevents the limiting rod from colliding and rubbing against the sealing plate when the moving plate moves downward to its extreme position, preventing wear and deformation of the components. At the same time, it provides temporary accommodation space for impurities that fall during the cleaning process, preventing impurities from accumulating at the bottom of the limiting rod and hindering the normal movement of the moving plate, thus ensuring the long-term stable operation of the filter cleaning mechanism.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention utilizes the rotational power of the impeller body to drive the filter cleaning mechanism through a reduction gear. Without the need for an additional power source, it can achieve automatic cleaning of the filter frame by the cleaning brush, effectively solving the problems of easy clogging and manual cleaning required in existing submersible pump filter structures, and reducing maintenance costs.

[0021] The filtration and cleaning mechanism is integrated inside the water inlet chamber, without increasing the overall size of the submersible pump, thus adapting to the structural requirements of small submersible pumps. Simultaneously, the cleaning brush performs a combined "rotation + up-and-down reciprocating" motion with the moving plate, providing comprehensive cleaning coverage and thoroughly removing impurities of different locations and shapes, ensuring the unobstructed flow of the filter frame's micropores. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] In the attached diagram:

[0024] Figure 1 This is a structural schematic diagram of a small impeller submersible pump;

[0025] Figure 2 This is a structural cross-sectional view of a small impeller submersible pump;

[0026] Figure 3 This is a schematic diagram of the filter cleaning mechanism in Embodiment 1;

[0027] Figure 4 This is a cross-sectional view of the filter frame in Embodiment 1;

[0028] Figure 5 This is a schematic diagram of the magnetic speed reduction device;

[0029] In the diagram: 1. Machine body; 2. Annular plate; 3. Locking bolt; 4. Threaded countersunk hole; 5. Housing; 6. Filter cleaning mechanism; 601. Filter frame; 602. Reciprocating lead screw; 603. Rotating shaft; 604. Limiting rod; 605. U-block; 606. Moving plate; 607. Positioning bolt; 608. Cleaning brush; 7. Connecting mechanism; 8. Impeller body; 9. Two-stage magnetic control reduction device; 91. Rotation input end; 92. Rotation output end. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example 1, as shown in Figures 1-5, provides a small impeller submersible pump suitable for applications with moderate sediment loads. It includes a body 1, with an annular plate 2 fitted around its exterior. The annular plate 2 is fixedly connected to a lower housing 5 by six evenly distributed locking bolts 3. The housing 5 contains a drain chamber and an inlet chamber arranged sequentially from top to bottom. An impeller body 8, fixed to the output shaft of the body 1 via a flat key, is located inside the drain chamber. An outlet is connected to the side of the drain chamber. The bottom of the inlet chamber is a closed plate. A filter frame 601, fixed to the inner wall of the housing by six annularly arranged positioning bolts 607, is located on the side of the inlet chamber. The surface of the filter frame 601 has micropores.

[0032] The inlet chamber is equipped with a filter cleaning mechanism 6, which includes a reciprocating screw 602, a rotating shaft 603, a limiting rod 604, a U-shaped block 605, a moving plate 606, and cleaning brushes 608. The reciprocating screw 602 is vertically fixed to the center of the upper surface of the sealing plate. The moving plate 606 is threadedly connected to the reciprocating screw 602, and two cleaning brushes 608 are fixedly connected to its two ends.

[0033] The rotating shaft 603 is driven by the impeller body 8 through the two-stage magnetic control reduction device 9. The rotation input end 91 of the two-stage magnetic control reduction device 9 is fixed to the impeller body 8, and the rotation output end 92 is fixed to the rotating shaft. The reduction ratio is 1:50. The U-shaped block 605 is fixed to the bottom of the rotating shaft 603. Two limiting rods 604 are symmetrically fixed on both sides of the U-shaped block. The limiting rods 604 pass through the limiting holes of the moving plate 606 and form a sliding fit. The difference between the diameter of the limiting hole and the outer diameter of the limiting rod 604 is 0.3mm. The gap between the lowest end of the limiting rod 604 and the closing plate is 10mm.

[0034] Usage process:

[0035] Submersible pump is submerged in the water body to be pumped, and machine body 1 is started. Machine body 1 drives impeller body 8 to rotate at high speed. The rotation of impeller body 8 generates pumping power. The water enters the inlet chamber after being filtered through the micropores of filter frame 601, and then flows into the outlet chamber. After being pressurized by impeller body 8, it is discharged from the outlet.

[0036] Meanwhile, the impeller body 8 drives the rotating shaft to rotate synchronously at a low speed through the two-stage magnetic control reduction device 9. The rotating shaft 603 drives the U-shaped block 605 and the limiting rod 604 to rotate together. The limiting rod 604 drives the moving plate 606 to rotate synchronously through the limiting hole of the moving plate 606. Under the action of the reciprocating screw 602, the moving plate 606 moves up and down along the reciprocating screw 602 synchronously, thereby driving the cleaning brushes 608 at both ends to perform a compound motion of "rotation + up and down reciprocation".

[0037] During operation, the bristles of the cleaning brush 608 are in close contact with the inner wall of the filter frame 601, continuously scraping away impurities such as mud, sand, and aquatic plants attached to the micropores. The impurities fall to the top of the sealing plate at the bottom of the water inlet chamber, preventing the micropores of the filter frame 601 from becoming clogged, ensuring a stable water flow, and guaranteeing the long-term efficient operation of the submersible pump.

[0038] Example 2: A small impeller submersible pump for use in environments with low sediment levels. This example provides a small impeller submersible pump comprising a body 1, an annular plate 2 externally fitted to the body 1 and fixed to a housing 5 by locking bolts 3, and a drainage chamber and an inlet chamber internally distributed vertically within the housing 5. A semi-open impeller body 8 is housed within the drainage chamber, and the impeller body 8 is connected to the output shaft of the body 1 via a flat key. An outlet is connected to the side of the drainage chamber.

[0039] The bottom of the water inlet chamber is a closed plate. The filter frame 601 on the side is fixed to the inner wall of the housing by positioning bolts 607. The micropores on the surface of the filter frame 601 have a diameter of 1.0 mm. The rotating shaft is driven by the impeller body 8 through a two-stage magnetic control reduction device 9 with a reduction ratio of 1:30. The gap between the limit rod 604 and the closed plate is 8 mm. The rest is the same as in Embodiment 1.

[0040] Example 3: A small impeller submersible pump, applied in scenarios with high sediment content, wherein the reduction ratio of the two-stage magnetic reducer 9 is 1:80. The rotation input end 91 of the two-stage magnetic reducer 9 is fixed to the impeller body 8 through a shrink sleeve, and the rotation output end 92 is welded to the rotating shaft. The two limiting rods 604 below the U-shaped block 605 pass through the limiting holes of the moving plate 606. The difference between the diameter of the limiting hole and the outer diameter of the limiting rod 604 is 0.4mm, and the gap between the lowest end of the limiting rod 604 and the sealing plate is 12mm. The rest is the same as in Example 1.

[0041] In summary, the three embodiments cover a variety of common pumping scenarios through differentiated adjustments of parameters such as different reduction ratios and clearances. All three adopt the design of "impeller-driven linkage filter cleaning mechanism", which can achieve automatic cleaning of the filter frame without the need for an additional power source, effectively solving the technical pain points of existing submersible pump filter structures being prone to clogging and requiring manual cleaning.

[0042] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A small impeller submersible pump, comprising a body (1), characterized in that: The outer side of the body (1) is fitted with an annular plate (2), and a shell (5) is provided below the annular plate (2). The interior of the shell (5) is provided with a drain chamber and a water inlet chamber from top to bottom. The interior of the drainage chamber is provided with an impeller body (8), and the side of the drainage chamber is connected to the water outlet; The water inlet chamber is equipped with a filtration and cleaning mechanism (6), the bottom of the water inlet chamber is a closed plate, and the side of the water inlet chamber is equipped with a filter frame (601) with micropores on the surface. The filter cleaning mechanism (6) includes a reciprocating lead screw (602), a rotating shaft, a limiting rod (604), a U-shaped block (605), a moving plate (606), and a cleaning brush (608). The bottom of the reciprocating screw (602) is fixedly connected to the upper surface of the closed plate. The movable plate (606) is sleeved on the reciprocating screw (602) by means of threaded connection. The two ends of the movable plate (606) are provided with cleaning brushes (608) that are adapted to the inner surface of the filter frame (601). The rotating shaft is connected to the impeller body (8) via a speed reduction device. A U-shaped block (605) is fixedly connected to the lower surface of the rotating shaft. Limiting rods (604) are fixedly provided at both ends of the U-shaped block (605). The limiting rods (604) pass through the moving plate (606) and extend to the upper surface of the closed plate. There is a gap between the lowest end of the limiting rods (604) and the closed plate.

2. A small impeller submersible pump according to claim 1, characterized in that: The aforementioned deceleration device is a magnetic deceleration device, and the deceleration ratio of the magnetic deceleration device is 1:10 to 1:

100.

3. A small impeller submersible pump according to claim 2, characterized in that: The magnetic deceleration device is a two-stage magnetic control deceleration device (9). The two-stage magnetic control deceleration device (9) includes a rotation input end (91) and a rotation output end (92). The rotation input end (91) is fixedly connected to the impeller body (8), and the rotation output end (92) is fixedly connected to the rotating shaft.

4. A small impeller submersible pump according to any one of claims 1-3, characterized in that: The filter frame (601) is fixedly connected to the inner wall of the housing (5) by positioning bolts (607) distributed in a ring array. The positioning bolts (607) are threaded through the edge of the filter frame (601) and extend into the threaded hole in the inner wall of the housing (5).

5. A small impeller submersible pump according to claim 4, characterized in that: Two cleaning brushes (608) are provided, and the two cleaning brushes (608) are respectively fixedly connected to the two sides of the movable plate (606), and the bristles of the cleaning brushes (608) are closely attached to the inner sidewall of the filter frame (601).

6. A small impeller submersible pump according to claim 3, characterized in that: There are two limiting rods (604), and the two limiting rods (604) are symmetrically fixedly connected to the two sides below the U-shaped block (605); the moving plate (606) has a limiting hole that is adapted to the limiting rod (604), and the limiting rod (604) passes through the limiting hole and forms a sliding fit with the limiting hole.

7. A small impeller submersible pump according to claim 6, characterized in that: The diameter of the limiting hole is larger than the outer diameter of the limiting rod (604), and the difference in diameter is 0.1-0.5mm.

8. A small impeller submersible pump according to claim 3, characterized in that: The gap between the lowest end of the limiting rod (604) and the closing plate is 5-15mm.

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