Submersible sewage pump

Abstract

This utility model relates to the technical field of sewage pumps and discloses a submersible sewage pump, including a motor assembly and a pump assembly. The output shaft of the motor assembly is connected to the impeller shaft inside the pump assembly. An anti-clogging structure is provided at the inlet of the pump assembly. The anti-clogging structure includes a bottom ring fixedly installed at the inlet end of the pump assembly, and a top ring fixedly installed on the outside of the bottom ring. An annular limiting groove is formed between the top ring and the bottom ring. A rotating ring is rotatably installed in the annular limiting groove. Multiple swing filter plates are arranged in a circular space inside the rotating ring. One end of the swing filter plate is hinged to the rotating ring. A drive mechanism is provided in the middle of the multiple swing filter plates. The drive mechanism drives the multiple swing filter plates to rotate and adjusts the opening and closing angle of the swing filter plates relative to the rotating ring. This device achieves trumpet-shaped opening and closing adjustment by setting multiple swing filter plates and related drive mechanisms, and has the advantages of flow self-adaptation and self-release of entangled objects.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage pumps, and more specifically, it relates to a submersible sewage pump. Background Technology

[0002] Submersible sewage pumps are widely used in municipal sewage discharge and industrial wastewater treatment. Their core function is to draw in fluids containing impurities by generating negative pressure through impurity rotation and to crush solid particles using a built-in cutting device. There are two operating modes for sewage pumps:

[0003] Firstly, the cutting blades, which rely solely on impeller shaft linkage to directly pulverize solid impurities, eliminate the need for a pre-filter. However, this method has several drawbacks: First, there is the issue of fiber entanglement. Flexible impurities such as plastic bags and hair can easily become entangled in the cutting blades, leading to a surge in torque and motor overload. Second, small particles can escape. Hard particles such as gravel and shells pass through the impeller un-crushed, accelerating wear.

[0004] Secondly, the design with a fixed filter screen adds a fixed filter screen at the inlet to intercept large particles, which are then further crushed by the cutting blades. However, this design has several drawbacks: First, the filter screen becomes statically clogged, with sticky sludge quickly accumulating on its surface, requiring frequent backwashing. Second, it creates a cleaning blind spot, as the rotating cutting blades do not interact with the static filter screen, making it impossible to remove dirt from the back of the screen. Third, the high-density filter screen increases inlet pressure loss, leading to decreased energy efficiency.

[0005] In view of this, we have studied and improved the existing structure and its shortcomings to provide a submersible sewage pump, in order to achieve a more practical purpose. Utility Model Content

[0006] This invention provides a submersible sewage pump to overcome the aforementioned defects in the prior art.

[0007] The purpose and effect of this submersible sewage pump are achieved by the following specific technical means:

[0008] A submersible sewage pump includes a motor assembly and a pump assembly. The output shaft of the motor assembly is connected to the impeller shaft inside the pump assembly. An anti-clogging structure is provided at the inlet of the pump assembly. The anti-clogging structure includes a bottom ring fixedly installed at the inlet end of the pump assembly, and a top ring fixedly installed outside the bottom ring. An annular limiting groove is formed between the top ring and the bottom ring. A rotating ring is rotatably installed in the annular limiting groove. Multiple oscillating filter plates are arranged in a circular arrangement in the inner ring space of the rotating ring. One end of the oscillating filter plate is hinged to the rotating ring. A drive mechanism is provided in the middle of the multiple oscillating filter plates. The drive mechanism drives the multiple oscillating filter plates to rotate and adjust the opening and closing angle of the oscillating filter plates relative to the rotating ring. A brush structure is provided on the outer side of the top ring. The oscillating filter plates unfold outward and rotate to contact the brush structure to clean dirt.

[0009] A further technical solution includes a drive rod, which is coaxially distributed with the impeller shaft inside the water pump assembly, and the drive rod and the water pump assembly can rotate synchronously. A rotating plate is fixedly installed at the end of the drive rod away from the impeller shaft, and a telescopic rod is fixedly installed at the axis of the rotating plate. A guide plate is fixedly installed at the end of the telescopic shaft of the telescopic rod. Multiple connecting rods are hinged to the circumferential edge of the guide plate. The end of the connecting rod away from the guide plate is hinged to the inner edge of the oscillating filter plate. The extension of the telescopic rod drives the multiple oscillating filter plates to unfold through the guide plate.

[0010] A further technical solution includes two electromagnetic components disposed on the side of the rotating blade near the water pump assembly. The impeller shaft end of the water pump assembly has synchronously rotating cutting blades. Two magnets are disposed on the side of the cutting blades near the rotating blades. When the electromagnetic components are energized, they generate a magnetic force that attracts each other with the magnets.

[0011] A further technical solution includes a brush structure comprising a spring frame fixedly mounted on the end face of the top ring, a second mounting frame spaced apart on the opposite side of the spring frame, a swing arm rotatably mounted on the second mounting frame, an arc-shaped base plate fixedly mounted on one end of the swing arm, a second spring between the arc-shaped base plate and the spring frame, and cleaning fibers mounted on the side of the arc-shaped base plate near the swing filter.

[0012] A further technical solution is that the circumference of the rotating ring has an axial through groove, and the inner edge of the rotating ring protrudes radially to form a first mounting bracket. A swing body is rotatably installed in the through groove, and a first spring is installed between the swing body and the first mounting bracket. The bottom of the swing body extends axially to form a wall scraping structure. The wall scraping structure rotates synchronously with the rotating ring to scrape off dirt from the side wall of the water pump assembly inlet.

[0013] A further technical solution involves a scraper protruding on the side wall of the scraper structure near the water inlet of the water pump assembly, with flushing channels provided on the scraper structure. The scrapers are distributed axially, with gaps between multiple scrapers, and the flushing channels are distributed in the gaps to facilitate centrifugal flow of water through the flushing channels and impact on the scrapers.

[0014] A further technical solution is that the brush structure is circumferentially distributed on the end face of the top ring. The brush structure includes several soft fiber structures extending in the opposite direction along the water inlet direction. The swing filter can rotate and contact the soft fiber structures to clean the dirt on the surface of the swing filter.

[0015] A further technical solution is that the oscillating filter plate has a fan-shaped structure with a filter port on it. The filter port extends radially along the oscillating filter plate to block dirt in the water.

[0016] A further technical solution is that the inner ring of the top ring has a second protrusion, and the side of the swing body near the second protrusion has a first protrusion. The first spring pushes the swing body to swing so that the first protrusion abuts against the second protrusion.

[0017] A further technical solution also includes a control module, the output of which is electrically connected to the telescopic rod and the electromagnetic component.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This device achieves horn-shaped opening and closing adjustment by setting multiple swing filter plates and related driving mechanisms. The flow guide plate and connecting rod are driven by the telescopic rod, so that the multiple swing filter plates unfold into a horn-shaped structure, achieving two major advantages: First, flow rate self-adaptation: the opening and closing angle is reduced under low flow conditions to improve filtration accuracy; the opening and closing angle is expanded under high flow conditions to reduce flow resistance. Second, self-release of entangled materials: the periodic opening and closing action during rotation can dispel entangled fiber impurities, such as cloth, plastic bags, etc., to reduce the clogging rate.

[0020] This device uses an electromagnetic component that works in conjunction with a magnet on the cutting blade to drive the oscillating filter to rotate relative to the brush structure via magnetic control. This reduces stress fatigue caused by mechanical transmission. Furthermore, by incorporating an oscillating body with a first protrusion and a top ring with a second protrusion, the outer edge of the unfolded oscillating filter continuously rubs against the brush structure on the top ring, achieving a dual cleaning effect of rotational scraping and radial vibration. The spring frame and swing arm design of the brush ensure that the bristles always conform to the curved surface of the filter, avoiding blind spots in cleaning. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the anti-blocking structure at 13 locations of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the anti-blocking structure 13 of this utility model.

[0024] Figure 4 This is a schematic diagram of the structure of the swing body 23 and the first mounting bracket 22 in this utility model;

[0025] Figure 5 This is a schematic diagram of one embodiment of the brush structure in this utility model;

[0026] Figure 6 This is a schematic diagram of the drive mechanism in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Motor assembly, 11. Water pump assembly, 12. Water outlet, 13. Anti-clogging structure, 14. Top ring, 15. Bottom ring, 16. Rotating ring, 17. Brush structure, 18. Swinging filter, 19. Wall scraping structure, 20. Concave annular groove, 21. Cylindrical roller, 22. First mounting bracket, 23. Swinging body, 24. First protrusion, 25. First spring, 26. Filter port, 28. Spring frame, 29. Second mounting bracket, 30. Second spring, 31. Arc-shaped base plate, 32. Cleaning fiber, 33. Second protrusion, 34. Swing rod, 36. Drive rod, 37. Rotating plate, 38. Electromagnetic component, 39. Telescopic rod, 40. Drainage plate, 41. Connecting rod, 42. Through groove. Detailed Implementation

[0029] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figure 1-6As shown, a submersible sewage pump includes a motor assembly 10 and a pump assembly 11. The output shaft of the motor assembly 10 is connected to the impeller shaft inside the pump assembly 11. An anti-clogging structure 13 is provided at the inlet of the pump assembly 11. The anti-clogging structure 13 includes a bottom ring 15 fixedly installed at the inlet of the pump assembly 11. A top ring 14 is also fixedly installed on the outside of the bottom ring 15. An annular limiting groove is formed between the top ring 14 and the bottom ring 15. A rotating ring 16 is rotatably installed in the annular limiting groove. Multiple swing filter plates 18 are arranged in a circular pattern in the inner ring space of the rotating ring 16. One end of the swing filter plate 18 is hinged to the rotating ring 16. A driving mechanism is provided in the middle of the multiple swing filter plates 18. The driving mechanism drives the multiple swing filter plates 18 to rotate and adjust the opening and closing angle of the swing filter plates 18 relative to the rotating ring 16. A brush structure 17 is provided on the outside of the top ring 14. The swing filter plates 18 unfold outward and rotate to contact the brush structure 17 to clean dirt.

[0033] The water pump assembly 11 is a centrifugal pump with an axial inlet and an outlet pipe 12. The inlet of the water pump assembly 11 is equipped with a cutting blade and a cutting disc. The cutting disc is fixed to the housing of the centrifugal pump, and the cutting blade is connected to the impeller shaft of the centrifugal pump to achieve synchronous rotation. The cutting blade rotates relative to the cutting disc to cut the dirt in the water.

[0034] Specifically, the bottom ring 15 has an inwardly recessed annular groove 20 formed on the end face facing the rotating ring 16. An annular groove is formed at the bottom surface of the inwardly recessed annular groove 20. Several cylindrical rollers 21 are installed in the first annular groove. The rotating ring 16 is fixedly sealed to the bottom ring 15. The side of the rotating ring 16 near the bottom ring 15 has a second annular groove corresponding to the first annular groove. The first annular groove and the second annular groove work together to restrict the two ends of the cylindrical rollers 21. The rotating ring 16 is fixedly connected to the bottom ring 15 and seals the inwardly recessed annular groove 20 to form an annular restricting groove. The rotating ring 16 rotates in the annular restricting groove. The outer edge of the rotating ring 16 rolls and contacts the cylindrical rollers 21 to reduce friction.

[0035] Preferably, the drive mechanism includes a drive rod 36, which is coaxially distributed with the impeller shaft inside the water pump assembly 11, and the drive rod 36 and the water pump assembly 11 can rotate synchronously. A rotating plate 37 is fixedly provided at the end of the drive rod 36 away from the impeller shaft. A telescopic rod 39 is fixedly provided at the axis of the rotating plate 37. A guide plate 40 is fixedly provided at the telescopic shaft end of the telescopic rod 39. Multiple connecting rods 41 are hinged to the circumferential edge of the guide plate 40. The end of the connecting rod 41 away from the guide plate 40 is hinged to the inner edge of the swing filter plate 18. The extension of the telescopic rod 39 drives the multiple swing filter plates 18 to unfold through the guide plate 40.

[0036] Specifically, a spindle is fixedly mounted at the center of the cutting blade. The spindle may have a spline structure to drive the drive rod 36 to rotate synchronously. Alternatively, in other embodiments of this application, the spindle and the drive rod 36 are fixedly connected.

[0037] Preferably, the drive mechanism further includes two electromagnetic components 38 disposed on the side of the rotating blade 37 near the water pump assembly 11. The impeller shaft end of the water pump assembly 11 has a synchronously rotating cutting blade. Two magnets are disposed on the side of the cutting blade near the rotating blade 37. When the electromagnetic components 38 are energized, they generate a magnetic force that attracts each other with the magnets.

[0038] Preferably, the brush structure 17 includes a spring frame 28 fixedly disposed on the end face of the top ring 14, a second mounting frame 29 spaced apart on the opposite side of the spring frame 28, a swing rod 34 rotatably disposed on the second mounting frame 29, an arc-shaped base plate 31 fixedly disposed at one end of the swing rod 34, a second spring 30 disposed between the arc-shaped base plate 31 and the spring frame 28, and cleaning fibers 32 disposed on the side of the arc-shaped base plate 31 near the swing filter 18.

[0039] Preferably, the rotating ring 16 has an axially penetrating through groove 42 at the beginning of its circumference, and the inner edge of the rotating ring 16 protrudes radially to form a first mounting bracket 22. A swing body 23 is rotatably arranged in the through groove 42. A first spring 25 is arranged between the swing body 23 and the first mounting bracket 22. The bottom of the swing body 23 extends axially to form a wall scraping structure 19. The wall scraping structure 19 rotates synchronously with the rotating ring 16 to scrape off dirt from the side wall of the water pump assembly 11 inlet.

[0040] Preferably, the scraper structure 19 has a scraper protruding on the side wall near the water inlet of the water pump assembly 11, and a flushing channel is opened on the scraper structure 19. The scrapers are distributed along the axial direction, and there are gaps between the multiple scrapers. The flushing channel is distributed in the gaps so that the water can pass through the flushing channel by centrifugal force and impact the scraper.

[0041] In other embodiments of this application, the brush structure 17 includes a plurality of soft fiber structures extending in the opposite direction along the water inlet direction. The brush structure 17 is circumferentially distributed on the end face of the top ring 14. The swing filter 18 unfolds and can rotate to contact the soft fiber structures to clean the dirt on the surface of the swing filter 18.

[0042] Preferably, the oscillating filter 18 has a fan-shaped structure with a filter port 26 on it. The filter port 26 extends radially along the oscillating filter 18 to block dirt in the water.

[0043] Preferably, the inner ring of the top ring 14 has a second protrusion 33, and the side of the swing body 23 near the second protrusion 33 has a first protrusion 24. The first spring 25 pushes the swing body 23 to swing so that the first protrusion 24 abuts against the second protrusion 33.

[0044] Preferably, it also includes a control module, the output of which is electrically connected to the telescopic rod 39 and the electromagnetic component 38.

[0045] The working process of this device is as follows:

[0046] The motor assembly 10 drives the impeller inside the water pump assembly 11 to rotate. The water first passes through the swing filter 18 for preliminary filtration and then enters the pump body through the inlet. Driven by the impeller, it flows out through the outlet pipe 12. In order to prevent the water from being blocked by dirt, the impeller drives the cutting blade to rotate to cut the dirt in the water.

[0047] After prolonged operation, dirt accumulates on the surface of the oscillating filter 18. To reduce the obstruction of the inlet by the dirt, the telescopic rod 39 extends, causing the guide plate 40 and connecting rod 41 to extend outward. The connecting rod 41 causes multiple oscillating filter 18 to unfold into a trumpet shape. The outer surface of the trumpet-shaped multiple oscillating filter 18 contacts the brush structure 17. The control module energizes the electromagnetic component 38, and the magnet on the cutting blade attracts the electromagnetic component 38. The rotating plate 37 starts to rotate under the action of magnetic force, and drives the rotating ring 16 to rotate through the telescopic rod 39, guide plate 40, and connecting rod 41. The rotating ring 16 drives the oscillating filter 18 to rotate relative to the brush structure 17, so as to achieve the effect of efficiently cleaning the dirt on the surface of the oscillating filter 18.

[0048] Simultaneously, the rotating ring 16 will also drive the wall scraping structure 19 to rotate synchronously. The wall scraping structure 19 rotates to scrape away the dirt on the side wall of the water pump assembly 11 inlet. Under the elastic force of the first spring 25, the swing body 23 naturally swings outward and contacts the second protrusion 33. When the swing body 23 rotates with the rotating ring 16, the top ring 14 remains stationary. Therefore, the mutual contact between the first protrusion 24 and the second protrusion 33 will cause the swing body 23 to vibrate in a small range. The swing body 23 transmits the vibration to the wall scraping structure 19. The scraper on the wall scraping structure 19 can vibrate radially to improve the wall scraping effect. Due to the action of the blades on the guide plate 40, the water flow can enter at the inlet at a spiral angle. There is a centrifugal effect at the outer periphery of the water flow. The centrifugal water flow can impact the blade through the flushing channel to clean the blade itself.

[0049] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A submersible sewage pump, comprising a motor assembly and a pump assembly, wherein the output shaft of the motor assembly is connected to an impeller shaft within the pump assembly, characterized in that: The water pump assembly has an anti-clogging structure at its inlet. The anti-clogging structure includes a bottom ring fixedly mounted on the water inlet end of the water pump assembly, a top ring fixedly mounted on the outside of the bottom ring, and an annular limiting groove formed between the top ring and the bottom ring. A rotating ring is rotatably mounted within the annular limiting groove. Multiple oscillating filter discs are arranged in a circular arrangement in the inner ring space of the rotating ring. One end of each oscillating filter disc is hinged to the rotating ring. A driving mechanism is provided in the middle of the multiple oscillating filter discs. The driving mechanism drives the multiple oscillating filter discs to rotate and adjust the opening and closing angle of the oscillating filter discs relative to the rotating ring. A brush structure is provided on the outside of the top ring. The oscillating filter discs unfold outward and rotate to contact the brush structure to clean dirt.

2. A submersible sewage pump according to claim 1, characterized in that: The driving mechanism includes a driving rod, which is coaxially distributed with the impeller shaft inside the water pump assembly and can rotate synchronously with the water pump assembly. A rotating plate is fixedly installed at the end of the driving rod away from the impeller shaft, and a telescopic rod is fixedly installed at the axis of the rotating plate. A guide plate is fixedly installed at the telescopic shaft end of the telescopic rod. Multiple connecting rods are hinged to the circumferential edge of the guide plate. The end of the connecting rod away from the guide plate is hinged to the inner edge of the oscillating filter. The extension of the telescopic rod drives the multiple oscillating filter plates to unfold through the guide plate.

3. A submersible sewage pump according to claim 2, characterized in that: The drive mechanism also includes two electromagnetic components disposed on the side of the rotating blade near the water pump assembly. The impeller shaft end of the water pump assembly has synchronously rotating cutting blades. Two magnets are disposed on the side of the cutting blades near the rotating blades. When the electromagnetic components are energized, they generate a magnetic force that attracts each other with the magnets.

4. A submersible sewage pump according to claim 1, characterized in that: The brush structure includes a spring frame fixedly mounted on the end face of the top ring, a second mounting frame spaced apart on the opposite side of the spring frame, a swing arm rotatably mounted on the second mounting frame, an arc-shaped base plate fixedly mounted on one end of the swing arm, a second spring between the arc-shaped base plate and the spring frame, and cleaning fibers mounted on the side of the arc-shaped base plate near the swing filter.

5. A submersible sewage pump according to claim 1, characterized in that: The rotating ring has an axially penetrating through groove at the beginning of its circumference, and the inner edge of the rotating ring protrudes radially to form a first mounting bracket. A swing body is rotatably arranged in the through groove. A first spring is arranged between the swing body and the first mounting bracket. The bottom of the swing body extends axially to form a wall scraping structure. The wall scraping structure rotates synchronously with the rotating ring to scrape off dirt from the side wall of the water pump assembly inlet.

6. A submersible sewage pump according to claim 5, characterized in that: The scraper structure has a protrusion on the side wall near the water inlet of the water pump assembly to form a scraper, and a flushing channel is opened on the scraper structure. The scrapers are distributed along the axial direction, and multiple scrapers are spaced apart. The flushing channel is distributed in the interval to allow water to pass through the flushing channel centrifugally and impact the scraper.

7. A submersible sewage pump according to claim 1, characterized in that: The brush structure is circumferentially distributed on the end face of the top ring. The brush structure includes several soft fiber structures extending in the opposite direction along the water inlet direction. The oscillating filter can rotate and contact the soft fiber structures to clean the dirt on the surface of the oscillating filter.

8. A submersible sewage pump according to claim 1, characterized in that: The oscillating filter plate has a fan-shaped structure with a filter port that extends radially along the oscillating filter plate to block dirt in the water.

9. A submersible sewage pump according to claim 5, characterized in that: The inner ring of the top ring has a second protrusion, and the side of the swing body near the second protrusion has a first protrusion. The first spring pushes the swing body to swing so that the first protrusion abuts against the second protrusion.

10. A submersible sewage pump according to claim 3, characterized in that: It also includes a control module, the output of which is electrically connected to the telescopic rod and the electromagnetic component, respectively.

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