CN112412890A

CN112412890A - Centrifugal water pump

Info

Publication number: CN112412890A
Application number: CN202011288046.XA
Authority: CN
Inventors: 金可友
Original assignee: Zhejiang Chuangmei Electromotor Co ltd
Current assignee: Jiangsu Huafeiyu Energy Saving Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-02-26
Anticipated expiration: 2040-11-17
Also published as: CN112412890B

Abstract

The invention provides a centrifugal water pump, which comprises a base, wherein both sides of the outer surface of the upper end of the base are fixedly provided with a fixed seat, the outer surface of the upper end of one side of the fixed seat is movably provided with a motor, the outer surface of the upper end of the other side of the fixed seat is movably provided with a pump body, a connecting frame is movably arranged between the pump body and the motor, the motor is movably provided with a crankshaft at the middle position of the outer surface of one side close to the pump body, the outer surface of the upper end of the pump body is provided with a drain pipe, the upper end of the drain pipe is provided with a piston pipe, the centrifugal water pump can carry out multi-stage filtration on feed water, can clean filtered impurities and clean a filter screen, prevents a filter cylinder from being blocked, ensures that an impeller is not influenced, when the pump body is not, the motor and the pump body are relatively fixed integrally, so that the polarization of a crankshaft is reduced, and the centrifugal effect of the impeller is guaranteed.

Description

Centrifugal water pump

Technical Field

The invention relates to the technical field of water pumps, in particular to a centrifugal water pump.

Background

The pump is a machine for conveying liquid or pressurizing liquid, which transmits the mechanical energy of a prime motor or other external energy to the liquid to increase the energy of the liquid, is mainly used for conveying the liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and can also convey liquid, gas mixture and liquid containing suspended solids, and the technical parameters of the performance of the water pump include flow, suction lift, shaft power, water power, efficiency and the like; the pump can be divided into a volumetric pump, a vane pump and the like according to different working principles, and the volumetric pump transfers energy by utilizing the change of the volume of a working chamber of the volumetric pump; vane pumps transfer energy by the interaction of rotating vanes with water and are available in the types of centrifugal pumps, axial flow pumps, mixed flow pumps, and the like.

The centrifugal water pump is one kind of pump, and before starting, water should be filled into the pump, and after starting, the rotating impeller drives the water in the pump to rotate at high speed, so that the water is centrifugally moved, thrown out and pressed into the water outlet pipe. After the water is thrown out, the pressure near the impeller is reduced, and a low-pressure area is formed near the rotating shaft. The pressure is much lower than the atmospheric pressure, and the outside water can open the bottom valve and enter the pump from the water inlet pipe under the action of the atmospheric pressure. The water rushed in is thrown out again in high-speed rotation along with the impeller and is pressed into the water outlet pipe. The impeller is driven by the power machine to rotate at a high speed continuously, and water is pumped from a low position to a high position by the centrifugal water pump continuously.

Because centrifugal water pump draws water by inside and outside pressure, consequently need be enough to target in place to the inside protection of water pump, can not let impurity get into the pump body and destroy or block the interior pipeline of pump, especially install in the field or pollute the water source that impurity is more, because current centrifugal water pump does not carry out effective optimization to it for current centrifugal water pump has certain defect: 1. the pump body filtering system is not perfect enough, impurities in water easily enter the pump body, so that the work of the impeller is influenced, even the impeller is damaged, and meanwhile, the impurities filtered outside are not easy to clean, so that a filter screen is easily blocked, and the normal conveying of liquid is influenced; 2. the pipe orifice of the water drain pipe of the pump body is in an open state when the pump body is not connected with a pipeline, so that when the pump body is used outdoors, external impurities can easily enter the pump body through the pipe orifice of the water drain pipe before the centrifugal pump is installed, and the normal work of the pump body is influenced; 3. traditional centrifugal pump is mostly fixed the motor on the installation base with the pump body, then runs through the spindle of motor to the pump body inside and be connected with the impeller, because the motor is relatively independent with the pump body, the motor during operation produces vibration, can lead to the spindle to rotate and produce polarization, influences the centrifugal effect of impeller.

Disclosure of Invention

The invention aims to provide a centrifugal water pump which can carry out multi-stage filtration on feed water, can clean impurities after filtration, can clean a filter screen, can prevent a filter drum from being blocked, and can ensure that the impeller does not influence work.

The invention provides a centrifugal water pump, which comprises a base, wherein both sides of the outer surface of the upper end of the base are fixedly provided with a fixed seat, the outer surface of the upper end of the fixed seat on one side is movably provided with a motor, the outer surface of the upper end of the fixed seat on the other side is movably provided with a pump body, a connecting frame is movably arranged between the pump body and the motor, the middle position of the outer surface of one side of the motor, which is close to the pump body, is movably provided with a crankshaft, the outer surface of the upper end of the pump body is provided with a drain pipe, the upper end of the drain pipe is provided with a piston pipe, the rear end of the drain pipe is provided with a drain connecting pipe, the middle position of the outer surface of one side;

the outer surface of one side of the water feeding port, which is far away from the pump body, is movably provided with a filter cylinder, the outer surface of one side of the crankshaft, which is near to the filter cylinder, is provided with a connecting shaft, the outer surface of one side of the connecting shaft, which is near to the filter cylinder, is provided with a cleaning shaft, the cleaning shaft penetrates through the filter cylinder, the outer surface of one side of the connecting shaft, which is near to the pump body, is provided with an impeller, the outer surface of one side of the filter cylinder, which is far away from the pump body, is provided with a first filter screen, the outer surfaces of the upper and lower ends of the cleaning shaft, which are far away from the pump body, are both fixedly provided with cutting knives, the cutting knives are positioned on one side of the first filter screen, which is far away from the filter cylinder, the inner middle, and a sealing ring is arranged on one side of the outer surface of the filter cylinder, which is far away from the pump body.

Preferably, the inside movable mounting of drain pipe has sealed piston, and movable mounting has the spring between the upper end surface of sealed piston and the upper end internal surface of piston pipe, sealed piston is closed to the drainage connecting pipe.

When the water supply is delivered into the water discharge pipe, the impeller does not deliver the water into the water discharge pipe through the centrifugal force, the sealing piston is not pushed by the water supply at the moment, the spring is reset to push the sealing piston into the water discharge pipe from the piston pipe, the water discharge connecting pipe is closed by the sealing piston, and the centrifugal pump is avoided not being used, external impurities enter the pump body through the drainage connecting pipe, and the impurities damage the impeller when the impeller is used.

Preferably, the elasticity of the spring is greater than the friction force between the sealing piston and the drain pipe and the piston pipe, and the elasticity of the spring is less than the thrust force of water flow in the drain pipe.

The impeller forms thrust to the centrifugal force that the feedwater caused and upwards promotes sealed piston for sealed piston is pushed inside the piston pipe, and the spring shrinkage deformation this moment, the delivery of feedwater is accomplished to the drainage connecting pipe opening, and after the feedwater is carried, the motor stop work, the impeller is not carrying to the drain pipe through centrifugal force through the feedwater in, and sealed piston no longer receives the thrust of feedwater this moment, and the spring resets and pushes sealed piston in the drain pipe from the piston pipe, utilizes sealed piston to be closed with the drainage connecting pipe.

Preferably, the link includes first flange and second flange, first flange is located one side of second flange, and fixed mounting has the flange dead lever between first flange and the second flange, one side surface intermediate position of first flange is equipped with the bearing, seal dish is close to one side surface intermediate position of the pump body and has seted up the shaft hole, the spindle runs through in shaft hole and bearing.

The motor and the pump body are connected and fixed through the connecting frame, so that the motor is connected with the first connecting flange on the connecting frame, the pump body is connected with the second connecting flange on the connecting frame, a crankshaft of the motor is penetrated through a bearing on the first connecting flange during connection, the shaft penetrates through the shaft hole on the second connecting flange, the shaft penetrates into the pump body, the pump body and the connecting frame are sealed through a sealing disc, then an impeller is arranged on one side of the outer surface of the shaft, which penetrates into the pump body, then the motor and the pump body are arranged on the base through the fixed seat, so that the motor and the pump body can be supported and fixed, the motor and the pump body are relatively fixed through the connecting frame, and the central points of the first connecting flange, the second connecting flange, the shaft hole and the bearing are ensured to be positioned on the same plane, thereby greatly reducing the polarization generated when the machine shaft rotates and ensuring the centrifugal effect of the impeller.

Preferably, the center points of the first connecting flange, the second connecting flange, the shaft hole and the bearing are located on the same plane.

The central points of the first connecting flange, the second connecting flange, the shaft hole and the bearing are positioned on the same plane, so that the polarization generated by the rotation of the shaft is greatly reduced, and the centrifugal effect of the impeller is guaranteed.

Preferably, the first filter screen and the second filter screen are both made of metal materials, and the filter holes of the second filter screen are smaller than those of the first filter screen.

The rigidity of first filter screen and second filter screen has been ensured to the metal material, avoids first filter screen and second filter screen emergence to become, and the filtration pore of second filter screen is less than the filtration pore formation secondary filter of first filter screen for the filter effect is more obvious.

Advantageous effects

1. When a centrifugal pump is used for conveying liquid, a water supply port and a water discharge connecting pipe of a pump body are respectively connected with a water supply device and a water collecting device, a pipeline connecting flange is adopted for connection during connection, a filter cartridge is inserted into the water supply device or the water supply pipeline when the water supply port is connected with the water supply device, the sealing ring can increase the sealing property between the filter cartridge and the water supply pipeline, then the water supply enters the pump body through the filter cartridge, the water supply can be filtered when passing through a first filter screen, impurities in the water supply are filtered and blocked by the first filter screen, impurities such as branches and gravels are easily clamped into filter holes of the first filter screen, so that the filter holes are blocked to influence the water supply speed, at the moment, a cleaning shaft is connected with a crankshaft by using a connecting shaft, the cleaning shaft is driven to rotate, the cutting knife is driven by the cleaning shaft to rotate, impurities originally outside the filter holes are stirred to the periphery of the first filter screen, the impurities originally clamped in the filter holes penetrate through the filter holes to enter the filter cylinders after being cut and crushed, secondary filtration is carried out through the second filter screen at the moment, the impurities after being cut and crushed are prevented from entering the inside of the pump body, meanwhile, the cleaning shaft rotates to drive the cleaning brush to rotate, the second filter screen is wiped by the cleaning brush, and the second filter screen is effectively prevented from being blocked by the impurities;

2. when the water supply is delivered into the water discharge pipe, the impeller does not deliver the water into the water discharge pipe through the centrifugal force, the sealing piston is not pushed by the water supply at the moment, the spring is reset to push the sealing piston into the water discharge pipe from the piston pipe, the water discharge connecting pipe is closed by the sealing piston, and the centrifugal pump is avoided not being used, external impurities enter the interior of the pump body through the drainage connecting pipe, so that the impurities damage the impeller when the impeller is used;

3. the motor and the pump body are connected and fixed through the connecting frame, so that the motor is connected with the first connecting flange on the connecting frame, the pump body is connected with the second connecting flange on the connecting frame, a crankshaft of the motor is penetrated through a bearing on the first connecting flange during connection, the shaft penetrates through the shaft hole on the second connecting flange, the shaft penetrates into the pump body, the pump body and the connecting frame are sealed through a sealing disc, then an impeller is arranged on one side of the outer surface of the shaft, which penetrates into the pump body, then the motor and the pump body are arranged on the base through the fixed seat, so that the motor and the pump body can be supported and fixed, the motor and the pump body are relatively fixed through the connecting frame, and the central points of the first connecting flange, the second connecting flange, the shaft hole and the bearing are ensured to be positioned on the same plane, thereby greatly reducing the polarization generated when the machine shaft rotates and ensuring the centrifugal effect of the impeller.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a view of the attachment bracket of the present invention in combination with an impeller;

FIG. 3 is a schematic view of a filter cartridge according to the present invention;

FIG. 4 is a view of the piston tube of the present invention in combination with a drain pan;

FIG. 5 is a view of the present invention showing the engagement of the cage with the gland plate;

fig. 6 is a view showing the coupling frame of the present invention coupled to a bearing.

Description of reference numerals:

1. a base; 2. a fixed seat; 3. a motor; 4. a pump body; 5. a connecting frame; 51. a first connecting flange; 52. a second connecting flange; 53. a flange fixing rod; 54. a shaft hole; 55. a bearing; 6. a crankshaft; 7. a drain pipe; 8. a piston tube; 9. a drainage connecting pipe; 10. a water supply port; 11. a pipeline connecting flange; 12. a filter cartridge; 13. a connecting shaft; 14. cleaning the shaft; 15. sealing the disc; 16. an impeller; 17. a first filter screen; 18. cutting; 19. a second filter screen; 20. a cleaning brush; 21. a seal ring; 22. a sealing piston; 23. a spring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, the present invention provides a technical solution:

a centrifugal water pump, as shown in figures 1 to 3, comprises a base 1, wherein both sides of the outer surface of the upper end of the base 1 are fixedly provided with a fixed seat 2, the outer surface of the upper end of the fixed seat 2 at one side is movably provided with a motor 3, the outer surface of the upper end of the fixed seat 2 at the other side is movably provided with a pump body 4, a connecting frame 5 is movably arranged between the pump body 4 and the motor 3, a crankshaft 6 is movably arranged at the middle position of the outer surface of one side of the motor 3 close to the pump body 4, a drain pipe 7 is arranged on the outer surface of the upper end of the pump body 4, a piston pipe 8 is arranged at the upper end of the drain pipe 7, a drain connecting pipe 9 is arranged at the rear end of the drain pipe 7, a water feeding port 10 is arranged at the middle position of the outer surface of one side of the pump body 4 far away from the motor 3, the outer surface of one side of the pump body 4, which is far away from the motor 3, is positioned at the periphery of the water feeding port 10 and the rear end of the drainage connecting pipe 9, and pipeline connecting flanges 11 are movably arranged;

the water supply port 10 is movably provided with a filter cylinder 12 at the outer surface of one side far away from the pump body 4, a connecting shaft 13 is arranged on the outer surface of one side close to the filter cylinder 12 of the crankshaft 6, a cleaning shaft 14 is movably arranged at one side close to the filter cylinder 12 of the connecting shaft 13, the cleaning shaft 14 penetrates through the filter cylinder 12, a sealing disc 15 is arranged on the outer surface of one side close to the pump body 4 of the connecting frame 5, the sealing disc 15 penetrates through the inside of the pump body 4, an impeller 16 is arranged at one side close to the pump body 4 of the outer surface of the crankshaft 6, a first filter screen 17 is arranged at the outer surface of one side far away from the pump body 4 of the filter cylinder 12, cutting knives 18 are fixedly arranged at one side far away from the filter cylinder 12 of the first filter screen 17, a second filter screen 19 is movably arranged at the middle position inside of the filter cylinder 12, and cleaning brushes, the cleaning brush 20 is positioned on one side of the second filter screen 19 far away from the pump body 4, a sealing ring 21 is arranged on one side of the outer surface of the filter cylinder 12 far away from the pump body 4, the first filter screen 17 and the second filter screen 19 are both made of metal materials, and the filter hole of the second filter screen 19 is smaller than that of the first filter screen 17;

by adopting the technical scheme, when a centrifugal pump is used for conveying liquid, the water supply port 10 and the drainage connecting pipe 9 of the pump body 4 are respectively connected with the water supply device and the water collection device, the pipeline connecting flange 11 is adopted for connection during connection, when the water supply port 10 is connected with the water supply device, the filter cartridge 12 is inserted into the water supply device or the water supply pipeline, the sealing ring 21 can increase the sealing property between the filter cartridge 12 and the water supply pipeline, then the water supply enters the pump body 4 through the filter cartridge 12, the water supply can be filtered when passing through the first filter screen 17, impurities in the water supply are filtered and blocked by the first filter screen 17, the impurities such as branches and gravels are easily clamped into the filter holes of the first filter screen 17, so that the filter holes are blocked to influence the water supply speed, at the moment, the cleaning shaft 14 is connected with the crankshaft 6 by the connecting shaft 13 and is rotated by the crankshaft, clean axle 14 drives cutting knife 18 and rotates and cuts the impurity of going into in the filtration pore and smash, make originally outside impurity in the filtration pore stir to first filter screen 17 around, and the impurity of originally going into in the filtration pore receives the inside that the filtration pore entered into a section of thick bamboo 12 after the cutting is smashed to the impurity of original card income, carry out secondary filter through second filter screen 19 this moment, avoid cutting the impurity after smashing and get into inside the pump body 4, clean axle 14 rotates simultaneously, drive cleaning brush 20 and rotate, utilize cleaning brush 20 to wipe second filter screen 19 and brush, prevent effectively that second filter screen 19 from receiving impurity and blockking up.

As an embodiment of the present invention, as shown in fig. 1 and 4, a sealing piston 22 is movably installed inside the drain pipe 7, a spring 23 is movably installed between an upper end outer surface of the sealing piston 22 and an upper end inner surface of the piston pipe 8, the sealing piston 22 closes the drain connecting pipe 9, an elastic force of the spring 23 is greater than a frictional force between the sealing piston 22 and the drain pipe 7 and the piston pipe 8, an elastic force of the spring 23 is smaller than a thrust force of water flow in the drain pipe 7, feed water enters the pump body 4, the motor 3 drives the impeller 16 to rotate through the crankshaft 6, the feed water is rotated by the impeller 16 to generate a centrifugal force, the feed water is guided into the drain connecting pipe 9 through the drain pipe 7 by the centrifugal force, the feed water is conveyed into the water collecting device through the drain connecting pipe 9, when the feed water enters the drain pipe 7, the impeller 16 forms a thrust force to the feed water to push the sealing piston 22, make inside sealing piston 22 is pushed into piston pipe 8, spring 23 contraction deformation this moment, drainage connecting pipe 9 is opened, accomplish the transport of feedwater, after the feedwater is carried to the completion, motor 3 stop work, impeller 16 is not carrying to drain pipe 7 through the feedwater through centrifugal force, sealing piston 22 no longer receives the thrust of feedwater this moment, spring 23 resets and pushes sealing piston 22 inside drain pipe 7 from piston pipe 8, utilize sealing piston 22 to close drainage connecting pipe 9, avoid when not using the centrifugal pump, external impurity gets into the inside of the pump body 4 through drainage connecting pipe 9, the impurity causes the damage to impeller 16 when leading to using.

As an embodiment of the present invention, as shown in fig. 1, 5 and 6, the connecting frame 5 includes a first connecting flange 51 and a second connecting flange 52, the first connecting flange 51 is located at one side of the second connecting flange 52, a flange fixing rod 53 is fixedly installed between the first connecting flange 51 and the second connecting flange 52, a bearing 55 is disposed at a middle position of an outer surface of one side of the first connecting flange 51, a shaft hole 54 is disposed at a middle position of an outer surface of one side of the sealing disc 15 close to the pump body 4, the shaft 6 penetrates through the shaft hole 54 and the bearing 55, center points of the first connecting flange 51, the second connecting flange 52, the shaft hole 54 and the bearing 55 are located on the same plane, the motor 3 and the pump body 4 are fixedly connected through the connecting frame 5, so that the motor 3 is connected with the first connecting flange 51 on the connecting frame 5, the pump body 4 is connected with the second connecting flange 52 on the connecting frame 5, during connection, a shaft 6 of the motor 3 penetrates through a bearing 55 on the first connecting flange 51 and penetrates out through a shaft hole 54 on the second connecting flange 52, the shaft 6 penetrates into the pump body 4, the pump body 4 and the connecting frame 5 are sealed through the sealing disc 15, then the impeller 16 is installed on one side of the outer surface of the shaft 6 penetrating into the pump body 4, then the motor 3 and the pump body 4 are installed on the base 1 through the fixing seat 2, the motor 3 and the pump body 4 are supported and fixed, the motor 3 and the pump body 4 are relatively fixed through the connecting frame 5, and central points of the first connecting flange 51, the second connecting flange 52, the shaft hole 54 and the bearing 55 are located on the same plane, so that polarization generated when the shaft 6 rotates is greatly reduced, and the centrifugal effect of the impeller 16 is guaranteed.

The working principle is as follows: firstly, the motor 3 and the pump body 4 are connected and fixed through the connecting frame 5, so that the motor 3 is connected with a first connecting flange 51 on the connecting frame 5, the pump body 4 is connected with a second connecting flange 52 on the connecting frame 5, a shaft 6 of the motor 3 penetrates through a bearing 55 on the first connecting flange 51 and penetrates out through a shaft hole 54 on the second connecting flange 52, the shaft 6 penetrates into the pump body 4, the sealing disc 15 is used for sealing between the pump body 4 and the connecting frame 5, then an impeller 16 is installed on one side of the outer surface of the shaft 6 penetrating into the pump body 4, then the motor 3 and the pump body 4 are installed on the base 1 through the fixing seat 2, so that the motor 3 and the pump body 4 are supported and fixed, the motor 3 and the pump body 4 are relatively fixed through the connecting frame 5, and the central points of the first connecting flange 51, the second connecting flange 52, the shaft hole 54 and the bearing 55 are ensured to be positioned on the same plane, thereby greatly reducing the polarization generated by the rotation of the crankshaft 6, ensuring the centrifugal effect of the impeller 16, then installing the filter cylinder 12 at the water supply port 10 of the pump body 4, filtering the water supply entering the pump body 4 by the filter cylinder 12, avoiding the impurities entering the pump body 4 to damage the impeller 16, when using the centrifugal pump to carry out liquid delivery, connecting the water supply port 10 and the water discharge connecting pipe 9 of the pump body 4 with the water supply device and the water collecting device respectively, when connecting, adopting the pipeline connecting flange 11 to connect, when connecting the water supply port 10 with the water supply device, inserting the filter cylinder 12 into the water supply device or the water supply pipeline, the sealing ring 21 can increase the sealing performance between the filter cylinder 12 and the water supply pipeline, then the water supply enters the pump body 4 through the filter cylinder 12, the water can be filtered when passing through the first filter screen 17, and the impurities in the water supply can be filtered and blocked by the first filter screen, impurities such as branches and gravels are easy to be clamped into the filter holes of the first filter screen 17, so that the filter holes are blocked to influence the water supply speed, at the moment, the cleaning shaft 14 is connected with the crankshaft 6 by the connecting shaft 13, the cleaning shaft 14 is driven to rotate by the rotation of the crankshaft 6, the cleaning shaft 14 drives the cutting knife 18 to rotate to cut and crush the impurities clamped into the filter holes, so that the impurities originally outside the filter holes are stirred to the periphery of the first filter screen 17, the impurities originally clamped into the filter holes penetrate through the filter holes to enter the filter cylinder 12 after being cut and crushed, at the moment, secondary filtration is carried out by the second filter screen 19, the impurities after cutting and crushing are prevented from entering the pump body 4, meanwhile, the cleaning shaft 14 rotates to drive the cleaning brush 20 to rotate, the second filter screen 19 is brushed by the cleaning brush 20, the second filter screen 19 is effectively prevented from being blocked by the impurities, and then the water is fed into, the motor 3 drives the impeller 16 to rotate through the shaft 6, the impeller 16 drives the feed water to rotate, so that centrifugal force is generated, the feed water is guided into the drain connecting pipe 9 through the drain pipe 7 through the centrifugal force, so that the feed water is conveyed into the water collecting device through the drain connecting pipe 9, when the feed water enters the drain pipe 7, the centrifugal force caused by the impeller 16 to the feed water forms thrust to push the sealing piston 22 upwards, so that the sealing piston 22 is pushed into the piston pipe 8, at the moment, the spring 23 contracts and deforms, the drain connecting pipe 9 is opened, the feed water conveying is completed, after the feed water conveying is completed, the motor 3 stops working, the impeller 16 is not conveyed into the drain pipe 7 through the feed water through the centrifugal force, at the moment, the sealing piston 22 is not pushed by the feed water any more, the spring 23 resets to push the sealing piston 22 into the drain pipe 7 from the piston pipe 8, and the, when the centrifugal pump is not used, external impurities enter the pump body 4 through the drainage connecting pipe 9, and the impeller 16 is prevented from being damaged by the impurities when the centrifugal pump is used.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal water pump comprises a base (1) and is characterized in that both sides of the outer surface of the upper end of the base (1) are fixedly provided with a fixing seat (2), one side of the outer surface of the upper end of the fixing seat (2) is movably provided with a motor (3), the other side of the outer surface of the upper end of the fixing seat (2) is movably provided with a pump body (4), a connecting frame (5) is movably arranged between the pump body (4) and the motor (3), a crankshaft (6) is movably arranged at the middle position of the outer surface of one side of the motor (3) close to the pump body (4), a water discharging pipe (7) is arranged at the outer surface of the upper end of the pump body (4), a piston pipe (8) is arranged at the upper end of the water discharging pipe (7), a water discharging connecting pipe (9) is arranged at the rear end of the water, and the outer surface of one side of the pump body (4) far away from the motor (3) is positioned at the periphery of the water feeding port (10) and the rear end of the drainage connecting pipe (9) and is movably provided with a pipeline connecting flange (11);

one side surface movable mounting that the pump body (4) was kept away from to feed port (10) has a section of thick bamboo (12), one side surface that spindle (6) is close to a section of thick bamboo (12) is equipped with connecting axle (13), and one side movable mounting that connecting axle (13) is close to a section of thick bamboo (12) has clean axle (14), clean axle (14) run through in a section of thick bamboo (12), one side surface that link (5) are close to the pump body (4) is equipped with sealed dish (15), and sealed dish (15) run through in the inside of the pump body (4), one side that the surface of spindle (6) is close to the pump body (4) is equipped with impeller (16), one side surface that the pump body (4) was kept away from to a section of thick bamboo (12) is equipped with first filter screen (17), the equal fixed mounting in one side that the pump body (4) was kept away from to the upper and lower both ends surface of clean axle (14) has cutting, the utility model discloses a pump body, including strain a section of thick bamboo (12), the inside intermediate position movable mounting of straining a section of thick bamboo (12) has second filter screen (19), the equal fixed mounting in upper and lower both ends surface intermediate position of clean axle (14) has cleaning brush (20), and cleaning brush (20) are located one side that the pump body (4) was kept away from in second filter screen (19), one side that the pump body (4) was kept away from to the surface of straining a section of thick bamboo (12) is equipped with sealing washer (21).

2. The centrifugal water pump according to claim 1, wherein a sealing piston (22) is movably installed inside the water discharge pipe (7), a spring (23) is movably installed between an upper end outer surface of the sealing piston (22) and an upper end inner surface of the piston pipe (8), and the sealing piston (22) closes the water discharge connection pipe (9).

3. A centrifugal water pump according to claim 2, characterized in that the spring (23) has a spring force which is greater than the friction between the sealing piston (22) and the drain pipe (7) and the piston tube (8), the spring force (23) being less than the thrust of the water flow in the drain pipe (7).

4. The centrifugal water pump according to claim 1, wherein the connecting frame (5) comprises a first connecting flange (51) and a second connecting flange (52), the first connecting flange (51) is located on one side of the second connecting flange (52), a flange fixing rod (53) is fixedly installed between the first connecting flange (51) and the second connecting flange (52), a bearing (55) is arranged in the middle of the outer surface of one side of the first connecting flange (51), a shaft hole (54) is formed in the middle of the outer surface of one side, close to the pump body (4), of the sealing disc (15), and the crankshaft (6) penetrates through the shaft hole (54) and the bearing (55).

5. A centrifugal water pump according to claim 4, characterized in that the centre points of the first and second attachment flanges (51, 52), the shaft hole (54) and the bearing (55) are located in the same plane.

6. The centrifugal water pump according to claim 1, wherein the first filter screen (17) and the second filter screen (19) are made of metal, and the filter holes of the second filter screen (19) are smaller than those of the first filter screen (17).