CN108757495B

CN108757495B - Intelligent centrifugal pump

Info

Publication number: CN108757495B
Application number: CN201810741617.7A
Authority: CN
Inventors: 林荣; 颜成刚; 谢倩倩; 张逸
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2018-07-06
Filing date: 2018-07-06
Publication date: 2024-03-15
Anticipated expiration: 2038-07-06
Also published as: CN108757495A

Abstract

The invention provides an intelligent centrifugal pump, and belongs to the technical field of water pumps. The water pump solves the technical problems of large occupied area, high use cost and the like of the existing water pump. The centrifugal pump comprises a pump body, wherein a motor and a pump cavity are arranged in the pump body, an output shaft of the motor extends into the pump cavity, and a plurality of groups of impeller assemblies are fixed on the output shaft; the pump body is also provided with a water inlet pipe and a water injection pipe which are communicated, the pump body is internally provided with a backflow cover, the backflow cover is internally provided with a backflow channel, one end of the backflow channel is communicated with the water inlet pipe, the other end of the backflow channel is communicated with the pump cavity, the backflow channel is internally movably provided with a backflow valve, the backflow valve can seal the backflow channel under the pressure action of the pump cavity, and the pump body is also provided with a water outlet pipe which is communicated with the pump cavity. The invention has the advantages of small occupied area, low use cost and the like.

Description

Intelligent centrifugal pump

Technical Field

The invention belongs to the technical field of water pumps, and relates to an intelligent centrifugal pump.

Background

When a common centrifugal pump works in an environment with a suction height, a vacuum needs to be formed in a suction pipeline, and the following methods are adopted:

1. a vacuum pump is installed, and the air in the water inlet pipeline is evacuated by the vacuum pump. The method has the defects of large investment, large occupied area and difficult realization of automatic control;

2. and installing a negative-pressure vacuum water diversion tank, and evacuating air in the water inlet pipeline by utilizing the volume of the vacuum water diversion tank. Its advantages are high investment and large occupied area.

Therefore, when the conventional centrifugal pump is used in an environment with a certain height difference, the occupied area is large and the use cost is high in order to empty the air in the pipeline.

Disclosure of Invention

The invention provides an intelligent centrifugal pump aiming at the problems existing in the prior art, and aims to solve the technical problems that: how to reduce the occupied area of the centrifugal pump and reduce the use cost of the centrifugal pump.

The aim of the invention can be achieved by the following technical scheme:

an intelligent centrifugal pump comprises a pump body, wherein a motor and a pump cavity are arranged in the pump body, an output shaft of the motor extends into the pump cavity, and a plurality of groups of impeller assemblies are fixed on the output shaft; the pump body is internally provided with a backflow cover, a backflow channel is arranged in the backflow cover, one end of the backflow channel is communicated with the water inlet pipe, the other end of the backflow channel is communicated with the pump cavity, a backflow valve is movably arranged in the backflow channel, the backflow channel can be sealed under the pressure action of the pump cavity, and a water outlet pipe communicated with the pump cavity is further arranged on the pump body.

The working principle is as follows: when the centrifugal pump is used, water can be injected into the pump body through the water injection pipe until the water is filled in the backflow channel, the pump cavity and the like, so that gas and liquid can be better mixed, and at the moment, the backflow valve on the backflow cover is in an opened state; then the water pump is started, the motor drives the impeller assembly to rotate at a high speed, so that gas and liquid are separated, lighter gas is discharged through the water outlet pipe, heavier water flows back into the pump cavity under the action of gravity and the like, flows back to the position close to the water inlet pipe through the return channel, is mixed with air in the pipeline again, and then is subjected to gas and liquid separation and exhaust through the impeller assembly, and the circulation is repeated until the air in the pipeline is exhausted. The impeller assembly continues to rotate, the pressure in the pump cavity is gradually increased until the reflux valve is pushed back inwards to seal the reflux channel, at the moment, water in the pump cavity is not refluxed to the water inlet pipe, and the water in the pipeline can be discharged out of the pump through the water inlet pipe, the impeller assembly, the pump cavity and the water outlet pipe. Compared with the prior art, the design discharges air in the pipeline through the self-priming principle by the action of water circulation in the pump, and equipment such as a vacuum pump, a water diversion tank and the like are not needed to be additionally arranged, so that the floor area is small, and the use cost is low.

In the intelligent centrifugal pump, the backflow cover comprises a cover body, the backflow channel comprises a water inlet cavity and a first flow channel, the water inlet cavity is communicated with the water inlet pipe, and the first flow channel is communicated with the water inlet cavity; the side wall of the cover body is also provided with a backflow pipe, a second flow channel communicated with the first flow channel is arranged in the backflow channel, the backflow valve is movably arranged in the second flow channel, and the side wall of the backflow pipe is also provided with at least one backflow hole communicated with the pump cavity. Compared with the prior art, the reflux cover in the design is provided with the reflux hole on the side wall of the reflux pipe, the reflux water can flow in through the reflux hole, the water in the water inlet cavity is communicated with the water in the pump cavity, the cross-sectional area of the water flow is larger, the reflux time of the water can be effectively saved, and the reflux efficiency is improved.

In the intelligent centrifugal pump, the number of the backflow holes is 3, and the backflow holes are uniformly distributed along the circumferential direction of the backflow pipe. The number of the reflow holes is 3 and the reflow holes are uniformly distributed, so that the amount of water reflowed in unit time can be further increased, and the reflow efficiency is improved.

In the intelligent centrifugal pump, a first boss is arranged on the side wall of the cover body, the first runner is arranged in the first boss, and the first boss and the inner wall of the return pipe are combined to form an annular mounting groove; the back flow is internally provided with a first spring, the upper end of the first spring is embedded in the mounting groove, the lower end of the first spring is connected with the back flow valve, and when the back flow valve is in an open state, the highest point of the back flow hole is higher than the sealing surface of the back flow valve. When the pump cavity, the impeller assembly and the water inlet cavity are filled with water, the internal pressure of the pump cavity, the impeller assembly and the water inlet cavity tend to be consistent, the reflux valve can be in an open state under the action of the first spring, and the highest point of the reflux hole is higher than the sealing surface of the reflux valve, so that the water flow can be effectively ensured to pass through; when the pressure in the impeller component and the pump cavity is increased, the reflux valve can move inwards under the action of the pressure and overcomes the elasticity of the first spring to seal the first flow passage.

In the intelligent centrifugal pump, a first sealing ring is sleeved on the sealing surface of the backflow valve. After the first sealing ring is designed, the sealing performance of the reflux valve can be improved.

In the intelligent centrifugal pump, the water inlet end of the cover body is provided with the annular groove along the axial direction, the pump body is internally provided with the boss II embedded in the annular groove, and the sealing ring II is arranged between the annular groove and the boss II. When the pump is assembled, the annular groove can be abutted against the pump body; because the annular groove is axially arranged, the annular groove is axially assembled with the pump body when the reflux cover is installed, and the assembly difficulty is lower than that of the radial assembly mode.

In the intelligent centrifugal pump, the water outlet valve and the second spring are arranged in the water outlet pipe, the lower end of the second spring is connected with the water outlet valve, and the upper end of the second spring is connected with the pipe wall of the water outlet pipe. After the water outlet valve is designed, when the self-priming valve is self-priming, gas can push the water outlet valve to overflow, and liquid falls back under the action of gravity; when the water pump normally absorbs water, the water flow can push the water outlet valve open to flow out.

In the intelligent centrifugal pump, the impeller assembly comprises a guide shell, an upper cover, a lower cover and guide vanes are sleeved on the output shaft of the motor in the guide shell, the upper cover is fixed on the lower cover, a first gap for liquid to pass through is formed between the upper cover and the output shaft, the lower cover is fixed on the output shaft, and a second gap for liquid to pass through is formed on the guide shell. The motor rotates to drive the upper cover, the lower cover and the like to rotate, and liquid in the pipeline can sequentially enter the next-stage impeller assembly through the first gap and the second gap and finally flows out of the water outlet pipe.

In the intelligent centrifugal pump, the center of the upper cover is provided with the boss III, the center of the boss III is provided with the through hole I, the upper surface of the upper cover is provided with at least two boss I, the boss III is further sleeved with the floating mouth ring which is movably matched with the boss I, the floating mouth ring can be attached to the boss I, the center of the lower cover is provided with the boss IV, the boss IV is inserted in the through hole I, the center of the boss IV is provided with the through hole II matched with the output shaft of the motor, and one face of the lower cover facing the upper cover is provided with a plurality of blades. When the centrifugal pump starts, the floating mouth ring arranged on the impeller can be rapidly separated from the impeller and is attached to the backflow cover, and the gap between the impeller and the backflow cover is reduced, so that water in the impeller chamber is not easy to flow back, the working efficiency of the water pump is improved, and the floating mouth ring can be rapidly separated from the impeller, so that larger friction force is not easily generated between the floating mouth ring and the impeller, and mutual abrasion of the floating mouth ring and the impeller due to the friction force is reduced.

In the intelligent centrifugal pump, the first protruding portions are uniformly distributed at intervals around the center line of the third boss, and two adjacent first protruding portions are mutually combined to form the first groove. The first protruding parts are uniformly distributed at intervals and form the first grooves, so that the contact area between the floating mouth ring and the impeller is reduced, the floating mouth ring and the impeller can be rapidly separated when being adhered, larger friction force is not easy to be generated between the floating mouth ring and the impeller, and the mutual abrasion of the floating mouth ring and the impeller due to the friction force is reduced.

In the intelligent centrifugal pump, the upper surface of the upper cover is provided with at least two through holes III, the blades are provided with positioning pins inserted in the through holes III, the lower surface of the upper cover is provided with at least two grooves II, and the blades are provided with protruding parts II which are clamped with the grooves II. The through hole III, the locating pin, the groove II and the protruding part II are arranged so that the upper cover and the lower cover can be tightly matched, and the rotating speeds of the upper cover and the lower cover are consistent when the centrifugal pump works, so that the working efficiency of the centrifugal pump is improved.

In the intelligent centrifugal pump, the upper cover, the boss III and the protruding part are integrally formed. The upper cover integrated into one piece makes impeller installation, dismantlement convenient, and the part is with trading simply.

In the intelligent centrifugal pump, the lower cover, the blades and the boss are integrally formed. The lower cover is integrally formed, so that the impeller is convenient to install and detach, and the parts are easy to replace.

In the intelligent centrifugal pump, a control assembly is arranged in the pump body, a sleeve is fixed below the control assembly, a support frame is arranged in the sleeve, the support frame comprises a first fixed ring and a second fixed ring which are coaxially and fixedly connected, the first fixed ring comprises a first inner ring and a first outer ring which are coaxially arranged, a first circulating unit for passing liquid is arranged between the first inner ring and the first outer ring, a plurality of protruding parts III are arranged on the outer surface of the first outer ring at intervals, and a third groove for passing liquid is formed between every two adjacent protruding parts III; the second fixing ring comprises a second inner ring and a second outer ring which are coaxially arranged, a second circulating unit for passing liquid is arranged between the second inner ring and the second outer ring, the first inner ring and the second inner ring are combined to form an inner cavity, and the motor is fixed in the inner cavity. The liquid in the pump cavity can sequentially pass through the first circulating unit and the second circulating unit to cool the motor positioned in the inner cavity; in addition, the liquid in the pump cavity can also cool the control assembly through the grooves, so that the cooling and radiating effects are further improved.

In the intelligent centrifugal pump, a stator sleeve is sleeved in the inner cavity of the supporting frame, and the motor is inserted in the stator sleeve. After the stator sleeve is designed, liquid can be prevented from flowing into the motor assembly to influence the normal performance of the motor.

In the centrifugal pump, a front bracket and a rear end cover are further arranged in the pump body, the front bracket is positioned between the pump cavity and the support frame and is fixedly connected with a first fixing ring of the support frame, a cooling flow passage is further formed in the front bracket, the front end of the cooling flow passage is communicated with the pump cavity, the rear end of the cooling flow passage is communicated with a first circulating unit and a groove in a three-phase manner, and a third sealing ring is arranged among the front bracket, the first fixing ring and the stator sleeve; the second fixing ring is fixedly connected with the rear end cover, and a fourth sealing ring is arranged among the rear end cover, the second fixing ring and the stator sleeve. The liquid in the pump cavity can flow into the first circulation unit and flow to the second circulation unit through the cooling flow channel on the front bracket under the action of the impeller assembly, and meanwhile, the liquid can flow into the third groove through the cooling flow channel to cool the control assembly; after the design is provided with the sealing ring III and the sealing ring IV, the influence of liquid entering the motor to the performance can be effectively avoided.

In the centrifugal pump, the stator sleeve is of an integrally formed structure. The integrally formed stator sleeve has better waterproof performance, higher structural strength and longer service life because no welding part exists.

In the intelligent centrifugal pump, the first fixing ring and the second fixing ring are made of plastics. Because install in the support frame, generally need add a sleeve outward, and telescopic processing exists the error easily, designs solid fixed ring one and solid fixed ring two into working of plastics to design bellying three on solid fixed ring one, can effectively reduce the fitting surface with between the sleeve, and even the sleeve exists the error, gu fixed ring one also accessible self micro deformation satisfies the assembly, reduces the assembly degree of difficulty.

In the above-mentioned intelligent centrifugal pump, the first flow cell includes a fourth through hole and a fifth through hole, the fourth through hole is located between the third protruding portion and the first inner ring, and the fifth through hole is located between two adjacent third protruding portions. The liquid in the pump chamber and impeller assembly can be cooled by the through holes four and five.

In the intelligent centrifugal pump, the protruding portions are evenly distributed around the center line of the first fixing ring, and the first mounting hole for the plug connector is formed between two adjacent protruding portions. The protruding parts are uniformly distributed, so that the problem of local stress concentration of the first fixing ring can be avoided, and the strength of the first fixing ring is improved.

In the intelligent centrifugal pump, the second circulating unit comprises an annular groove positioned between the second outer ring and the second inner ring, and an annular reinforcing rib for dividing the annular groove into two parts is arranged between the second outer ring and the second inner ring. The annular groove and the annular reinforcing ribs are designed, so that the strength of the second fixing ring can be improved while more liquid can circulate.

In the intelligent centrifugal pump, the annular reinforcing rib is provided with the mounting part connected with the second outer ring and the second inner ring, and the mounting part is internally provided with the second mounting hole for the plug connector. The installation part is designed on the annular reinforcing rib, and the annular reinforcing rib is connected with the second outer ring and the second inner ring, so that various connection effects can be achieved while the liquid passing area is increased as much as possible, and the cooling effect is improved.

In the intelligent centrifugal pump, a plurality of T-shaped reinforcing ribs are arranged between the first fixing ring and the second fixing ring at intervals. After the T-shaped reinforcing ribs are designed, the integral strength of the support frame can be improved.

In the intelligent centrifugal pump, the water injection pipe and the water outlet pipe are connected with the pump body through the U-shaped bolts respectively, the joint of the water injection pipe and the water outlet pipe is provided with the sealing ring five, the upper surfaces of the water injection pipe and the water outlet pipe are provided with the waterproof plates, and the waterproof plates are connected with the shell of the centrifugal pump through the buckles. The water outlet pipe and the pump body are connected through the U-shaped bolt, the waterproof plate and the water pump shell are connected through the buckle, the assembly and the disassembly are easy, the screw fixation is not needed, the water pump can be installed as a standardized module, the working efficiency is improved, and the production cost is reduced. In addition, for the hook-shaped buckle of ordinary use, rectangular curved protruding and recess are difficult for the fracture, and its area of contact is bigger, and it is more firm to connect.

Compared with the prior art, the invention has the following advantages:

1. the design discharges the air in the pipeline through the self-priming principle by the action of water circulation in the pump, and equipment such as a vacuum pump, a water diversion tank and the like is not needed to be additionally arranged, so that the floor area is small, and the use cost is low;

2. according to the reflux cover in the design, the side wall of the reflux pipe is provided with the reflux hole, the reflux water can flow in through the reflux hole, so that the water in the water inlet cavity is communicated with the water in the pump cavity, the cross-sectional area of the water flow is larger, the reflux time of the water can be effectively saved, and the reflux efficiency is improved;

3. when the centrifugal pump is started, the floating mouth ring arranged on the impeller can be rapidly separated from the impeller and is abutted against the backflow cover, so that a gap between the impeller and the backflow cover is reduced, water in the impeller chamber is not easy to flow back, the working efficiency of the water pump is improved, and the floating mouth ring can be rapidly separated from the impeller, so that larger friction force is not easy to be generated, and mutual abrasion of the floating mouth ring and the impeller due to the friction force is reduced;

4. the integrally formed stator sleeve has better waterproof performance, higher structural strength and longer service life because of no welding part;

5. because install in the support frame, generally need add a sleeve outward, and telescopic processing exists the error easily, designs solid fixed ring one and solid fixed ring two into working of plastics to design bellying three on solid fixed ring one, can effectively reduce the fitting surface with between the sleeve, and even the sleeve exists the error, gu fixed ring one also accessible self micro deformation satisfies the assembly, reduces the assembly degree of difficulty.

Drawings

Fig. 1 is a cross-sectional view of the present centrifugal pump.

Fig. 2 is a partial enlarged view of one of fig. 1.

Fig. 3 is another enlarged partial view of another portion of fig. 1.

Fig. 4 is a partial enlarged view of fig. 3.

Fig. 5 is a schematic structural view of the flow preventing cover.

Fig. 6 is a schematic structural view of the support frame.

Fig. 7 is a schematic structural view of the impeller assembly.

Fig. 8 is an exploded schematic view of the impeller assembly.

Fig. 9 is a schematic view of the structure of the upper cover.

In the figure, 1, a pump body; 2. a motor; 3. a pump chamber; 4. an output shaft; 5. a water inlet pipe; 6. A water injection pipe; 7. a reflow cover; 8. a return channel; 9. a return valve; 10. a cover body; 11. a water inlet cavity; 12. a first runner; 13. a return pipe; 14. a second flow passage; 15. a reflow hole; 16. A boss I; 17. a mounting groove; 18. a first spring; 19. a first sealing ring; 20. an annular groove; 21. a boss II; 22. a second sealing ring; 23. a water outlet valve; 24. a second spring; 25. A diversion shell; 26. an upper cover; 27. a lower cover; 28. a guide vane; 29. a first gap; 30. a second gap; 31. a boss III; 32. a first through hole; 33. a first protruding part; 34. a floating collar; 35. a boss IV; 36. a second through hole; 37. a blade; 38. a groove I; 39. a third through hole; 40. a positioning pin; 41. a second groove; 42. a second protruding part; 43. a control assembly; 44. A sleeve; 45. a support frame; 46. a first fixed ring; 47. a second fixing ring; 48. an inner ring I; 49. an outer ring I; 50. a first flow cell; 51. a groove III; 52. an inner ring II; 53. An outer ring II; 54. a second flow cell; 55. an inner cavity; 56. a stator sleeve; 57. a front bracket; 58. a rear end cover; 59. a cooling flow passage; 60. a third sealing ring; 61. a sealing ring IV; 62. a through hole IV; 63. a through hole V; 64. a first mounting hole; 65. an annular groove; 66. annular reinforcing ribs; 67. a mounting part; 68. a second mounting hole; 69. t-shaped reinforcing ribs; 70. a U-shaped bolt; 71. a fifth sealing ring; 72. a waterproof board; 73. a third protruding part; 74. and a water outlet pipe.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the centrifugal pump comprises a pump body 1, a motor 2 and a pump cavity 3 are arranged in the pump body 1, an output shaft 4 of the motor 2 extends into the pump cavity 3, and a plurality of groups of impeller assemblies are fixed on the output shaft 4; the pump body 1 is further provided with a water inlet pipe 5 and a water injection pipe 6 which are communicated, the pump body 1 is internally provided with a backflow cover 7, the backflow cover 7 is internally provided with a backflow channel 8, one end of the backflow channel 8 is communicated with the water inlet pipe 5, the other end of the backflow channel 8 is communicated with the pump cavity 3, the backflow channel 8 is internally and movably provided with a backflow valve 9, the backflow valve 9 can seal the backflow channel 8 under the pressure effect of the pump cavity 3, and the pump body 1 is further provided with a water outlet pipe 74 communicated with the pump cavity 3. Preferably, the water injection pipe 6 and the water outlet pipe 74 are respectively connected with the pump body 1 through U-shaped bolts 70, a sealing ring five 71 is arranged at the joint of the water injection pipe 6 and the water outlet pipe 74, a waterproof plate 72 is arranged on the upper surfaces of the water injection pipe 6 and the water outlet pipe 74, and the waterproof plate 72 is connected with the shell of the centrifugal pump through a buckle.

As shown in fig. 2 and 5, the backflow cover 7 comprises a cover body 10, the backflow channel 8 comprises a water inlet cavity 11 and a first flow channel 12 which are arranged in the cover body 10, the water inlet cavity 11 is communicated with the water inlet pipe 5, and the first flow channel 12 is communicated with the water inlet cavity 11; the side wall of the cover body 10 is also provided with a return pipe 13, a second flow channel 14 communicated with the first flow channel 12 is arranged in the return channel 8, the return valve 9 is movably arranged in the second flow channel 14, and the side wall of the return pipe 13 is also provided with at least one return hole 15 communicated with the pump cavity 3. In the present embodiment, the number of return holes 15 is preferably 3, and is uniformly distributed in the circumferential direction of the return pipe 13.

Specifically, a first boss 16 is arranged on the side wall of the cover body 10, the first runner 12 is arranged in the first boss 16, and the first boss 16 and the inner wall of the return pipe 13 are combined to form an annular mounting groove 17; the return pipe 13 is internally provided with a first spring 18, the upper end of the first spring 18 is embedded in the mounting groove 17, the lower end of the first spring 18 is connected with the return valve 9, and when the return valve 9 is in an open state, the highest point of the return hole 15 is higher than the sealing surface of the return valve 9. The sealing surface of the reflux valve 9 is sleeved with a first sealing ring 19. The water inlet end of the cover body 10 is axially provided with an annular groove 20, a second boss 21 embedded in the annular groove 20 is arranged in the pump body 1, and a second sealing ring 22 is arranged between the annular groove 20 and the second boss 21. The water outlet valve 23 and the second spring 24 are arranged in the water outlet pipe 74, the lower end of the second spring 24 is connected with the water outlet valve 23, and the upper end of the second spring 24 is connected with the pipe wall of the water outlet pipe 74.

As shown in fig. 1 and 4, the impeller assembly comprises a guide shell 25, an upper cover 26, a lower cover 27 and guide vanes 28 are sleeved on an output shaft 4 of the motor 2, the upper cover 26 is fixed on the lower cover 27, a first gap 29 for liquid to pass through is formed between the upper cover 26 and the output shaft 4, the lower cover 27 is fixed on the output shaft 4, and a second gap 30 for liquid to pass through is formed on the guide shell 25.

Specifically, as shown in fig. 7, 8 and 9, a boss three 31 is provided at the center of the upper cover 26, a first through hole 32 is provided at the center of the boss three 31, at least two first protrusions 33 are provided on the upper surface of the upper cover 26, a floating collar 34 in movable fit is further sleeved on the boss three 31, the floating collar 34 can be abutted to the first protrusions 33, a boss four 35 is provided at the center of the lower cover 27, the boss four 35 is inserted into the first through hole 32, a second through hole 36 matched with the output shaft 4 of the motor 2 is provided at the center of the boss four 35, and a plurality of blades 37 are provided on one surface of the lower cover 27 facing the upper cover 26. The first bosses 33 are uniformly spaced around the center line of the third boss 31, and adjacent first bosses 33 are combined with each other to form a first groove 38. The upper surface of upper cover 26 is equipped with two at least through-holes III 39, is equipped with the locating pin 40 that alternates in through-hole III 39 on the blade 37, and the lower surface of upper cover 26 is equipped with two at least recesses II 41, is equipped with the bellying II 42 with recess II 41 joint on the blade 37. The upper cover 26, the boss III 31 and the boss I33 are integrally formed. The lower cover 27, the vane 37 and the boss four 35 are integrally formed.

As shown in fig. 3 and 6, a control assembly 43 is arranged in the pump body 1, a sleeve 44 is fixed below the control assembly 43, a support frame 45 is arranged in the sleeve 44, the support frame 45 comprises a first fixed ring 46 and a second fixed ring 47 which are coaxially and fixedly connected, the first fixed ring 46 comprises a first inner ring 48 and a first outer ring 49 which are coaxially arranged, a circulation unit 50 for passing liquid is arranged between the first inner ring 48 and the first outer ring 49, a plurality of protruding parts three 73 are arranged on the outer surface of the first outer ring 49 at intervals, and a groove three 51 for passing liquid is formed between every two adjacent protruding parts three 73; the second fixing ring 47 includes a second inner ring 52 and a second outer ring 53 which are coaxially arranged, a second circulation unit 54 for passing liquid is arranged between the second inner ring 52 and the second outer ring 53, the first inner ring 48 and the second inner ring 52 are mutually combined to form an inner cavity 55, and the motor 2 is fixed in the inner cavity 55. A stator sleeve 56 is sleeved in the inner cavity 55 of the supporting frame 45, and the motor 2 is inserted into the stator sleeve 56. A front bracket 57 and a rear end cover 58 are further arranged in the pump body 1, the front bracket 57 is positioned between the pump cavity 3 and the support frame 45 and is fixedly connected with the first fixing ring 46 of the support frame 45, a cooling flow passage 59 is further arranged on the front bracket 57, the front end of the cooling flow passage 59 is communicated with the pump cavity 3, the rear end of the cooling flow passage 59 is communicated with the first circulating unit 50 and the third groove 51, and a third sealing ring 60 is arranged among the front bracket 57, the first fixing ring 46 and the stator sleeve 56; the second fixing ring 47 is fixedly connected with the rear end cover 58, and a fourth sealing ring 61 is arranged among the rear end cover 58, the second fixing ring 47 and the stator sleeve 56.

Preferably, the stator housing 56 is of an integrally formed construction. The first fixing ring 46 and the second fixing ring 47 are made of plastic. The first flow cell 50 includes a fourth through hole 62 and a fifth through hole 63, the fourth through hole 62 being located between the third boss 73 and the first inner ring 48, and the fifth through hole 63 being located between two adjacent third bosses 73. The third bosses 73 are uniformly distributed around the center line of the first fixing ring 46, and a first mounting hole 64 for the plug connector is formed between two adjacent third bosses 73. The second flow cell 54 includes an annular groove 65 between the second outer ring 53 and the second inner ring 52, and an annular rib 66 for dividing the annular groove 65 into two is provided between the second outer ring 53 and the second inner ring 52. The annular reinforcing rib 66 is provided with a mounting portion 67 connected with the outer ring 53 and the inner ring 52, and a mounting hole 68 for the plug connector is formed in the mounting portion 67. A plurality of T-shaped reinforcing ribs 69 are arranged between the first fixing ring 46 and the second fixing ring 47 at intervals.

The working principle of the invention is as follows: when the centrifugal pump is used, water can be injected into the pump body through the water injection pipe until the water is filled in the backflow channel, the pump cavity and the like, so that gas and liquid can be better mixed, and at the moment, the backflow valve on the backflow cover is in an opened state; then the water pump is started, the motor drives the impeller assembly to rotate at a high speed, so that gas and liquid are separated, lighter gas is discharged through the water outlet pipe, heavier water flows back into the pump cavity under the action of gravity and the like, flows back to the position close to the water inlet pipe through the return channel, is mixed with air in the pipeline again, and then is subjected to gas and liquid separation and exhaust through the impeller assembly, and the circulation is repeated until the air in the pipeline is exhausted. The impeller assembly continues to rotate, the pressure in the pump cavity is gradually increased until the reflux valve is pushed back inwards to seal the reflux channel, at the moment, water in the pump cavity is not refluxed to the water inlet pipe, and the water in the pipeline can be discharged out of the pump through the water inlet pipe, the impeller assembly, the pump cavity and the water outlet pipe.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, pump body is used more herein; 2. a motor; 3. a pump chamber; 4. an output shaft; 5. a water inlet pipe; 6. a water injection pipe; 7. a reflow cover; 8. a return channel; 9. a return valve; 10. A cover body; 11. a water inlet cavity; 12. a first runner; 13. a return pipe; 14. a second flow passage; 15. A reflow hole; 16. a boss I; 17. a mounting groove; 18. a first spring; 19. a first sealing ring; 20. an annular groove; 21. a boss II; 22. a second sealing ring; 23. a water outlet valve; 24. a second spring; 25. a diversion shell; 26. an upper cover; 27. a lower cover; 28. a guide vane; 29. a first gap; 30. a second gap; 31. a boss III; 32. a first through hole; 33. a first protruding part; 34. a floating collar; 35. a boss IV; 36. a second through hole; 37. a blade; 38. a groove I; 39. a third through hole; 40. a positioning pin; 41. a second groove; 42. a second protruding part; 43. a control assembly; 44. A sleeve; 45. a support frame; 46. a first fixed ring; 47. a second fixing ring; 48. an inner ring I; 49. an outer ring I; 50. a first flow cell; 51. a groove III; 52. an inner ring II; 53. an outer ring II; 54. a second flow cell; 55. an inner cavity; 56. a stator sleeve; 57. a front bracket; 58. A rear end cover; 59. a cooling flow passage; 60. a third sealing ring; 61. a sealing ring IV; 62. a through hole IV; 63. a through hole V; 64. a first mounting hole; 65. an annular groove; 66. annular reinforcing ribs; 67. a mounting part; 68. a second mounting hole; 69. t-shaped reinforcing ribs; 70. a U-shaped bolt; 71. A fifth sealing ring; 72. a waterproof board; 73. a third protruding part; 74. water outlet pipe, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.

Claims

1. An intelligent centrifugal pump comprises a pump body (1), wherein a motor (2) and a pump cavity (3) are arranged in the pump body (1), an output shaft (4) of the motor (2) extends into the pump cavity (3), and a plurality of groups of impeller assemblies are fixed on the output shaft (4); the novel water pump is characterized in that a water inlet pipe (5) and a water injection pipe (6) which are communicated are further arranged on the pump body (1), a backflow cover (7) is arranged in the pump body (1), a backflow channel (8) is arranged in the backflow cover (7), one end of the backflow channel (8) is communicated with the water inlet pipe (5), the other end of the backflow channel (8) is communicated with the pump cavity (3), a backflow valve (9) is movably arranged in the backflow channel (8), the backflow valve (9) can seal the backflow channel (8) under the pressure action of the pump cavity (3), and a water outlet pipe (74) which is communicated with the pump cavity (3) is further arranged on the pump body (1);

a control assembly (43) is arranged in the pump body (1), a sleeve (44) is fixed below the control assembly (43), a support frame (45) is arranged in the sleeve (44), the support frame (45) comprises a first fixed ring (46) and a second fixed ring (47) which are coaxial and fixedly connected, the first fixed ring (46) comprises a first inner ring (48) and a first outer ring (49) which are coaxially arranged, a first circulating unit (50) for passing liquid is arranged between the first inner ring (48) and the first outer ring (49), a third protruding part (73) which is distributed at intervals is arranged on the outer surface of the first outer ring (49), and a third groove (51) for passing liquid is formed between every two adjacent third protruding parts (73); the second fixing ring (47) comprises a second inner ring (52) and a second outer ring (53) which are coaxially arranged, a second circulating unit (54) for passing liquid is arranged between the second inner ring (52) and the second outer ring (53), the first inner ring (48) and the second inner ring (52) are mutually combined to form an inner cavity (55), and the motor (2) is fixed in the inner cavity (55);

the backflow cover (7) comprises a cover body (10), the backflow channel (8) comprises a water inlet cavity (11) and a first flow channel (12) which are arranged in the cover body (10), the water inlet cavity (11) is communicated with the water inlet pipe (5), and the first flow channel (12) is communicated with the water inlet cavity (11); the side wall of the cover body (10) is also provided with a return pipe (13), a second flow channel (14) communicated with the first flow channel (12) is arranged in the return channel (8), the return valve (9) is movably arranged in the second flow channel (14), and the side wall of the return pipe (13) is also provided with at least one return hole (15) communicated with the pump cavity (3);

a stator sleeve (56) is sleeved in an inner cavity (55) of the supporting frame (45), and the motor (2) is inserted in the stator sleeve (56);

the novel cooling pump is characterized in that a front support (57) and a rear end cover (58) are further arranged in the pump body (1), the front support (57) is located between the pump cavity (3) and the support frame (45) and fixedly connected with a first fixing ring (46) of the support frame (45), a cooling flow passage (59) is further formed in the front support (57), the front end of the cooling flow passage (59) is communicated with the pump cavity (3), the rear end of the cooling flow passage (59) is communicated with a first circulating unit (50) and a third groove (51), and a third sealing ring (60) is arranged among the front support (57), the first fixing ring (46) and the stator sleeve (56); the second fixing ring (47) is fixedly connected with the rear end cover (58), and a fourth sealing ring (61) is arranged among the rear end cover (58), the second fixing ring (47) and the stator sleeve (56).

2. The intelligent centrifugal pump according to claim 1, wherein the impeller assembly comprises a guide shell (25), an upper cover (26), a lower cover (27) and guide vanes (28) are sleeved on an output shaft (4) of the motor (2) in the guide shell (25), the upper cover (26) is fixed on the lower cover (27) and forms a first gap (29) for liquid to pass through with the output shaft (4), the lower cover (27) is fixed on the output shaft (4), and a second gap (30) for liquid to pass through is formed on the guide shell (25).

3. The intelligent centrifugal pump according to claim 2, wherein the center of the upper cover (26) is provided with a boss III (31), the center of the boss III (31) is provided with a through hole II (36) matched with the output shaft (4) of the motor (2), the upper surface of the upper cover (26) is provided with at least two boss I (33), the boss III (31) is further sleeved with a floating mouth ring (34) which is in movable fit, the floating mouth ring (34) can be abutted against the boss I (33), the center of the lower cover (27) is provided with a boss IV (35), the boss IV (35) is inserted in the through hole I (32), the center of the boss IV (35) is provided with a through hole II (36) matched with the output shaft (4) of the motor (2), and one face of the lower cover (27) facing the upper cover (26) is provided with a plurality of blades (37).

4. The intelligent centrifugal pump according to claim 1, wherein the water injection pipe (6) and the water outlet pipe (74) are respectively connected with the pump body (1) through U-shaped bolts (70), a sealing ring five (71) is arranged at the joint of the water injection pipe and the water outlet pipe, a waterproof plate (72) is arranged on the upper surfaces of the water injection pipe (6) and the water outlet pipe (74), and the waterproof plate (72) is connected with the shell of the centrifugal pump through a buckle.