Downdraft submersible electric pump

Abstract

The utility model relates to the technical field of submersible electric pumps, in particular to a downdraft submersible electric pump which comprises a base, and a water filter screen is arranged at the bottom of the base. The water absorption cover is fixed on the base, and a bottom valve is arranged at the bottom. The submersible motor is arranged in the water absorption cover; the cleaning mechanism comprises a first bevel gear, a second bevel gear and a driven shaft, the driven shaft is vertically and rotatably connected to the middle of the water filter screen, the second bevel gear is fixed to the bottom of the driven shaft, the first bevel gear is fixed to a driving shaft, the first bevel gear is in meshed connection with the second bevel gear, a scraping rod is fixed to the driving shaft, and a flexible scraping piece is arranged on the scraping rod. Through the design that a downdraft structure is matched with a bottom water filter screen and a bottom valve, a water inlet is moved downwards to the bottommost end of the equipment. Through the design that a downdraft structure is matched with a bottom water filter screen and a bottom valve, a water inlet is moved downwards to the bottommost end of the equipment. Rotation motion is converted into circumferential motion of the scraping rod through the bevel gear set, and the flexible scraping piece continuously scrapes the surface of the water filter screen.

Description

TECHNICAL FIELD

[0001] The utility model relates to submersible electric pump technical field especially relates to a down draft type submersible electric pump. BACKGROUND

[0002] The submersible electric pump adopts the structure design that motor and water pump are directly connected, and is integrally submerged in water to run, and is the core equipment of deep well water pumping, and its application range covers resident water supply, mine rescue, industrial cooling system, agricultural irrigation, seawater transportation, ship ballast regulation and landscape fountain, river and lake reservoir channel and other water conservancy projects.

[0003] The traditional machine type adopts the middle suction type water inlet structure, and the water inlet is arranged at the connecting position of the motor and the pump body (that is, the middle position of the equipment). When the water level of the running environment drops below the middle water inlet, the equipment will be damaged due to overheating due to the failure to form effective water circulation, and there is a safety hazard. UTILITY MODEL CONTENTS

[0004] In order to solve the defects existing in the prior art, the utility model provides a down draft type submersible electric pump.

[0005] The utility model employs the technical scheme: a down draft type submersible electric pump, including base, its bottom is equipped with the filter screen with the through -hole structure. Water suction cover, fixed on the base, its bottom is equipped with bottom valve, the bottom valve is check valve, the bottom valve is used for guaranteeing the water in the water suction cover unidirectional flow and forming annular cooling water channel. Submersible motor, be equipped with inside the water suction cover, its guide bearing and thrust bearing are all water lubrication bearing, a plurality of impulse water wheels, be equipped with filter screen outside water inlet end, include runner and the circumferentially distributed spoon shape blade, the runner is driven to rotate through the vertical impact blade of water flow, the runner is all fixed on the drive shaft, the drive shaft both ends are rotatably connected with the base. Cleaning mechanism, including bevel gear one, bevel gear two and driven shaft, the driven shaft is rotatably connected in the middle part of filter screen, bevel gear two is fixed on the driven shaft bottom, bevel gear one is fixed on the drive shaft, bevel gear one is engaged with bevel gear two, the drive shaft is fixed with the scraper, the scraper is provided with flexible scraper blade, the flexible scraper blade extends along the radial and keeps contact with the filter screen surface. Pump body, be located in the upper end of submersible motor, be equipped with centrifugal impeller in the pump body, the impeller shaft is connected with the shaft of submersible motor through the shaft coupling. Water inlet shell, through the flange and water suction cover sealed connection, the water inlet shell is fixedly connected with the pump body.

[0006] Further improvement of the above scheme is that the filter screen is integrally formed with the base, and the mesh diameter is not greater than 3mm.

[0007] Further improvement of the above scheme is that the submersible motor is connected with a lead tube, the other end of the lead tube extends to the outside of the water suction cover, the path of the lead tube is in an arc-shaped bending structure, and the lead tube is used for connecting the power line of the submersible motor.

[0008] Further improvement of the above scheme is that a sealing box is arranged at the meshing position of the bevel gear one and the bevel gear two, and sealing gaskets are embedded in the contact surfaces of the driving shaft and the driven shaft.

[0009] Further improvement of the above scheme is that a corrugated pressure regulating film is arranged at the top of the submersible motor shell, and the pressure regulating film is made of rubber material.

[0010] Further improvement of the above scheme is that the stator winding of the submersible motor is made of polyethylene insulated nylon sheathed water-resistant winding wire.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] Firstly, the water inlet is moved to the bottom end of the equipment through the lower suction type structure, the bottom filter net and the bottom valve, so that the electric pump can still keep normal water suction when the water level is lowered to 1 / 5 of the total height of the equipment, and the effective working water depth is greatly improved compared with the traditional middle suction type structure.

[0013] Secondly, the impact water wheel and the cleaning mechanism constitute a self-cleaning system, the water flow energy is used to drive the runner, the rotary motion is converted into the circumferential motion of the scraper rod through the bevel gear set, the flexible scraper continuously scrapes the surface of the filter net, and the filter net is effectively prevented from being blocked by impurities such as algae and silt. DETAILED DESCRIPTION

[0014] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is Figure 1 It is a structural enlarged schematic diagram of part A;

[0017] Figure 3 It is a structural schematic diagram of the filter net, the impact water wheel and the cleaning mechanism;

[0018] Figure 4 It is Figure 3 It is a structural enlarged schematic diagram of part B;

[0019] Figure 5 It is a structural schematic diagram of the impact water wheel.

[0020] In the figure: 1. base; 2. water filter net; 3. water suction cover; 4. bottom valve; 5. submersible motor; 6. impact water wheel; 61. blade; 62. runner; 7. drive shaft; 8. bevel gear one; 9. bevel gear two; 10. driven shaft; 11. scraper rod; 12. flexible scraper; 13. pump body; 14. impeller; 15. coupling; 16. lead tube; 17. sealing box; 18. sealing washer; 19. pressure regulating film; 20. water inlet shell. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0022] A down draft submersible electric pump, comprising a base 1, the bottom of which is provided with a water filter net 2 with a through hole structure. A water suction cover 3 is fixed to the base 1, the bottom of which is provided with a bottom valve 4, the bottom valve 4 is a one-way valve, and the bottom valve 4 is used for ensuring the one-way flow of water in the water suction cover 3 and forming an annular cooling water channel. A submersible motor 5 is arranged inside the water suction cover 3, the guide bearing and the thrust bearing of which are water-lubricated bearings; a plurality of impact water wheels 6 are arranged at the water inlet end outside the water filter net 2, comprising a runner 62 and a plurality of spoon-shaped blades 61 which are uniformly distributed in the circumferential direction, the runner 62 is driven to rotate by the vertical impact of the water flow on the blades 61, the runner 62 is fixed on a drive shaft 7, and the two ends of the drive shaft 7 are rotatably connected to the base 1. A cleaning mechanism comprises a bevel gear one 8, a bevel gear two 9 and a driven shaft 10, the driven shaft 10 is rotatably connected to the middle of the water filter net 2, the bevel gear two 9 is fixed to the bottom of the driven shaft 10, the bevel gear one 8 is fixed to the drive shaft 7, the bevel gear one 8 is meshingly connected to the bevel gear two 9, the drive shaft 7 is fixed with a scraper rod 11, the scraper rod 11 is provided with a flexible scraper 12, the flexible scraper 12 extends in the radial direction and keeps contact with the surface of the water filter net 2. A pump body 13 is located at the upper end of the submersible motor 5, the pump body 13 is provided with a centrifugal impeller 14 inside, and the shaft of the impeller 14 is connected to the shaft of the submersible motor 5 through a coupling 15. A water inlet shell 20 is sealingly connected to the water suction cover 3 through a flange, and the water inlet shell 20 is fixedly connected to the pump body 13. The water filter net 2 can filter out impurities and stones in the water, preventing these impurities from entering the inside of the water suction cover 3 and affecting the heat dissipation of the submersible motor 5. The bottom valve 4 ensures that a water circulation space is formed in the water suction cover 3, ensuring that the submersible motor 5 is in a circulating water cooling state, thereby prolonging the service life of the submersible pump. The impact water wheel 6 and the cleaning mechanism constitute a self-cleaning system, the runner 62 is driven by the kinetic energy of the water flow, the rotary motion is converted into the circumferential motion of the scraper rod 11 through the bevel gear set, and the flexible scraper 12 continuously scrapes the surface of the water filter net 2, effectively preventing impurities such as algae and silt from blocking the mesh holes.

[0023] Wherein, water from the bottom of the water suction cover 3 through the bottom valve 4 suction, flow through the submerged motor 5 peripheral cooling channel formation after entering the pump body 13, by the impeller 14 centrifugal pressurization after discharge. Down suction type structure with the bottom filter net 2 and bottom valve 4 design, the water inlet moves to the bottom of the device, the electric pump can still maintain normal water absorption when the water level drops to the total height of the device 1 / 5, the effective working water depth of the traditional middle suction type structure greatly.

[0024] Wherein, the filter net 2 is integrally formed with the base 1, the mesh diameter is not more than 3mm, for blocking the sand and impurities into the water suction cover 3 inside, the structure strength of the integrally formed filter net 2 is improved, and the anti deformation ability is enhanced.

[0025] Wherein, the submerged motor 5 is connected with the lead tube 16, the other end of the lead tube 16 extends to the outside of the water suction cover 3, the path is arc bending structure, the lead tube 16 is used for connecting the power line of the submerged motor 5.

[0026] Wherein, the meshing part of the bevel gear one 8 and the bevel gear two 9 is provided with a sealing box 17, the contact surface of the sealing box 17 and the driving shaft 7 and the driven shaft 10 is embedded with a sealing gasket 18, which prevents the invasion of foreign matters such as sand and algae in the meshing area of the bevel gear, and avoids the tooth surface scratch caused by hard particles.

[0027] Wherein, the top of the submerged motor 5 shell is provided with a corrugated pressure regulating film 19, the pressure regulating film 19 is made of rubber material, which deforms by elastic force to regulate the internal pressure of the submerged motor 5, prevent the internal pressure of the submerged motor 5 from being too high or too low due to the change of external water pressure, avoid the deformation or sealing failure of the submerged motor 5 shell; at the same time, it can absorb the vibration and impact during the operation of the submerged motor 5, reduce the damage to the internal structure of the submerged motor 5, and prolong the service life.

[0028] Wherein, the stator winding of the submerged motor 5 is made of polyethylene insulated nylon sheath water resistant winding wire, which has good water resistance and long service life.

[0029] Working principle:

[0030] Water from the filter net 2 relies on the suction of the impeller 14 to ensure the operation of the pump, changes the up suction pump into down suction pump, and lowers the running water level. The liquid outside the submerged motor 5 changes from dead water to flowing water. The flowing water can take away the heat generated by the submerged motor 5 during operation, thereby improving the reliability of the submerged motor 5.

[0031] When water is sucked from the bottom of the water suction cover 3 through the bottom valve 4, impurities in the water are filtered by the water filter net 2, the water flow vertically impacts the blade 61 to drive the rotating wheel 62 to rotate, the rotating wheel 62 drives the driving shaft 7 to rotate through the engagement of the bevel gear one 8 and the bevel gear two 9, and then drives the driven shaft 10 to rotate, and further drives the flexible scraper 12 on the scraper rod 11 to continuously scrape the surface of the water filter net 2, so that the impurities such as algae and silt are effectively prevented from blocking the mesh.

[0032] In the description of the present application, it should be pointed out that, unless otherwise stated, the meaning of "a plurality of" is two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] Although the content of the present application has been described in detail by the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation on the present application. After reading the above content, various modifications and alternatives of the present application will be obvious to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. A submersible electric pump of the down draft type, characterized in that, The utility model relates to a water purification and pumping device, comprising: a base (1) with a water filter net (2) at the bottom; a water suction cover (3) fixed on the base (1) and having a bottom valve (4) at the bottom, the bottom valve (4) being a one-way valve, and the bottom valve (4) being used to ensure the one-way flow of water in the water suction cover (3) and form a ring-shaped cooling water channel; a submersible motor (5) arranged inside the water suction cover (3) and having water-lubricated bearings for guide bearing and thrust bearing; a plurality of impact water wheels (6) arranged at the water inlet end outside the water filter net (2) and comprising a runner (62) and spoon-shaped blades (61) evenly distributed in the circumferential direction, the runner (62) being driven to rotate by the vertical impact of water flow on the blades (61), and the runner (62) being fixed on a drive shaft (7), the two ends of the drive shaft (7) being rotatably connected to the base (1); a cleaning mechanism comprising a bevel gear one (8), a bevel gear two (9) and a driven shaft (10), the driven shaft (10) being vertically rotatably connected to the middle of the water filter net (2), the bevel gear two (9) being fixed at the bottom of the driven shaft (10), the bevel gear one (8) being fixed on the drive shaft (7), the bevel gear one (8) being meshingly connected to the bevel gear two (9), a scraping rod (11) being fixed on the drive shaft (7), a flexible scraping sheet (12) being arranged on the scraping rod (11), and the flexible scraping sheet (12) extending in the radial direction and being in contact with the surface of the water filter net (2); a pump body (13) arranged at the upper end of the submersible motor (5), the pump body (13) having a centrifugal impeller (14) arranged therein, and the shaft of the impeller (14) being connected to the shaft of the submersible motor (5) through a shaft coupling (15); a water inlet shell (20) sealingly connected to the water suction cover (3) through a flange, and the water inlet shell (20) being fixedly connected to the pump body (13).

2. A submersible electric pump of the down draft type according to claim 1, characterized in that: The water filter net (2) is integrally formed with the base (1), and the mesh diameter of the water filter net (2) is not greater than 3 mm.

3. A submersible electric pump of the down draft type according to claim 1, characterized in that: The submersible motor (5) is connected with a lead tube (16), the other end of the lead tube (16) extending to the outside of the water suction cover (3), the path of the lead tube (16) being in an arc-shaped bending structure, and the lead tube (16) being used to connect the power line of the submersible motor (5).

4. A submerged electric pump of the down draft type according to claim 1, characterized in that: A sealing box (17) is arranged at the meshing position of the bevel gear one (8) and the bevel gear two (9), and a sealing gasket (18) is embedded in the contact surface of the sealing box (17) and the drive shaft (7) and the driven shaft (10).

5. A submersible electric pump of the down draft type according to claim 1, characterized in that: A corrugated pressure regulating film (19) made of rubber is arranged at the top of the shell of the submersible motor (5).

6. A submerged electric pump of the down draft type according to claim 1, characterized in that: The stator winding of the submersible motor (5) is made of polyethylene insulated nylon sheath water-resistant winding wire.

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