Centrifugal pump

Abstract

The utility model provides a centrifugal pump which comprises a pump body, a power assembly and a water flow switch, the pump body is provided with a water inlet and a water outlet, a flowing channel communicated with the water inlet and the water outlet is arranged in the pump body, the power assembly is arranged in the pump body, and the water flow switch is arranged in the pump body. The water flow switch is suitable for driving liquid to flow from the water inlet to the water outlet through the flowing channel, an inserting hole communicated with the flowing channel is formed in the pump body, and the water flow switch is operably arranged in the inserting hole and used for blocking the flowing channel. And furthermore, the flowing channel is controlled to selectively provide the liquid to the water outlet. Thus, the water flow switch used for controlling circulation of the flowing channel is arranged on the pump body, so that liquid is controlled to flow out through the water outlet after passing through the water inlet and the flowing channel, the reliability and stability of the centrifugal pump can be effectively improved, and it is guaranteed that a user can adjust opening and closing of the water outlet in time according to actual needs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pumps, and further relates to a centrifugal pump. BACKGROUND

[0002] The centrifugal pump works by rotating the impeller to make water move centrifugally. Before starting, the pump body and the water suction pipe are filled with water. Then, the motor is started to drive the impeller and water to rotate at high speed. Water moves centrifugally and is thrown to the outer edge of the impeller, and then flows into the water pump pressure pipe through the flow channel of the volute pump body.

[0003] At present, the existing centrifugal pump controls the water outlet through a control switch to control the starter or frequency converter of the motor to control the start and stop of the motor. This centrifugal pump controlled by the circuit is labor-saving and convenient. However, this control method may fail due to electronic components, which prevents the user from closing the water outlet in time.

[0004] Therefore, the utility model is committed to providing a centrifugal pump to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] In view of the above technical problems, the utility model aims to provide a centrifugal pump. The user can control the opening and closing of the centrifugal pump by operating the water flow switch according to actual needs, especially when the circuit-controlled centrifugal pump fails, to ensure the stability and reliability of the centrifugal pump.

[0006] In order to achieve the above purpose, the present application provides a centrifugal pump, comprising:

[0007] A pump body is provided with a water inlet and a water outlet. A flow channel is arranged in the pump body and communicates with the water inlet and the water outlet.

[0008] A power assembly is arranged in the pump body and is adapted to drive the liquid to flow from the water inlet to the water outlet through the flow channel.

[0009] A water flow switch is arranged in the pump body and communicates with the flow channel. The water flow switch is operatively arranged in the jack to block the flow channel, thereby selectively providing the liquid to the water outlet through the flow channel.

[0010] In some embodiments, the water flow switch is provided with a liquid inlet hole matched with the flow channel. The water flow switch is used to adjust the liquid inlet hole and the flow channel to be arranged correspondingly or offset each other, so as to selectively control the water inlet and the water outlet to be communicated through the flow channel.

[0011] In some embodiments, the water flow switch is movably inserted into the socket, and has a first position and a second position in the socket;

[0012] When the water flow switch is in the first position, the liquid inlet hole corresponds to the flow channel, so that the liquid flows through the flow channel to the water outlet; when the water flow switch is in the second position, the liquid inlet hole and the flow channel are misaligned, so that the liquid cannot flow through the flow channel to the water outlet.

[0013] In some embodiments, the water flow switch is rotatably arranged in the socket to control the liquid inlet hole and the flow channel to be arranged correspondingly or misaligned.

[0014] In some embodiments, the water flow switch comprises a valve core and a sealing ring, the sealing ring is sleeved and fixed on the outside of the valve core, so that the water flow switch is in airtight connection with the socket through the sealing ring, and the liquid inlet hole is arranged on the valve core.

[0015] In some embodiments, the water flow switch is provided with a mounting groove, and a blocking piece is arranged in the mounting groove, one end of the blocking piece is adapted to extend out of the mounting groove to block the flow channel.

[0016] In some embodiments, the pump body comprises a first shell and a second shell, the first shell is provided with a receiving cavity, the power assembly is arranged in the receiving cavity, and the water inlet is arranged on the first shell;

[0017] The second shell is arranged on one side of the first shell and forms the flow channel together with the first shell, and the water outlet and the socket are arranged on the second shell.

[0018] In some embodiments, the power assembly comprises a battery, a motor and an impeller, the first shell is provided with an impeller groove near one side of the second shell, the impeller groove is in communication with the water inlet and the flow channel, and the impeller is arranged in the impeller groove;

[0019] The motor is in transmission connection with the impeller and is in electrical connection with the battery.

[0020] In some embodiments, the second shell is provided with a circuit board in electrical connection with the motor and the battery, the circuit board is provided with a switch button and a charging connector;

[0021] The second shell is provided with a switch hole and a charging hole, and a switch button and a charging connector are arranged in the switch hole and the charging hole respectively, and sealing protection members are arranged in the switch hole and the charging hole.

[0022] In some embodiments, a filter plate is further included and detachably arranged at the water inlet.

[0023] Compared with the prior art, the centrifugal pump provided by the application has the following beneficial effects:

[0024] 1. The centrifugal pump provided by the application has a jack connected with a flow channel on the pump body, and a water flow switch is arranged in the jack, so that the flow of the flow switch can be adjusted, and the opening and closing of the water outlet of the centrifugal pump are controlled, thereby realizing mechanical opening and closing of the centrifugal pump, effectively improving the stability and reliability of the centrifugal pump, and ensuring that the user can adjust the opening and closing of the centrifugal pump according to actual needs.

[0025] 2. The centrifugal pump provided by the application has a plugging member arranged in the mounting groove of the water flow switch, one end of the plugging member can extend out of the mounting groove, so that the plugging member can better plug the flow channel, reduce the possibility of liquid outflow, ensure the sealing effect when the centrifugal pump is closed, and a sealing ring is further fixedly arranged on the outer side of the valve core, so that the water flow switch is in airtight connection with the jack, further ensuring the sealing effect of the centrifugal pump, and also improving the friction between the water flow switch and the jack, and reducing the possibility of affecting the opening and closing of the centrifugal pump due to accidental touch.

[0026] 3. The centrifugal pump provided by the application has a filter plate arranged at the water inlet, so that impurities entering the pump body can be filtered, and the possibility of affecting the service life of the centrifugal pump due to impurities is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above characteristics, technical features, advantages and implementation modes of the application will be further described in the following preferred embodiments in a clear and understandable manner combined with the accompanying drawings.

[0028] Figure 1 is a structural schematic view of the centrifugal pump provided by the application;

[0029] Figure 2 is a sectional view of the centrifugal pump provided by the application;

[0030] Figure 3 is a schematic view of the internal structure of the centrifugal pump provided by the application;

[0031] Figure 4It is a kind of centrifugal pump's water flow switch's structural schematic diagram provided by the utility model,

[0032] Figure 5 It is the utility model provides Figure 3 The local amplification schematic diagram of A.

[0033] Explanation of reference numerals:

[0034] Pump body 1, first shell 11, water inlet 111, second shell 12, water outlet 121, water outlet connector 122, insertion hole 13, flow channel 14, circuit board 15, switch button 16, charging connector 17, filter plate 18, connecting piece 19, water flow switch 2, valve core 21, liquid inlet hole 22, plugging element 23, sealing ring 24, first adjusting button 25, second adjusting button 26, power assembly 3, battery 31, motor 32, impeller 33. Specific implementation

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the specific implementation of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only some embodiments of the present application, for those skilled in the art, without the premise of creating labor, can also obtain other drawings according to these drawings, and obtain other implementation ways.

[0036] In order to make the drawing simple, only the part related to the application is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, the same structure or function in some drawings is only schematically shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0037] It should be further understood that the term "and / or" used in the specification and the appended claims of the present application means any combination of one or more of the associated listed terms and all possible combinations, and includes these combinations.

[0038] In this paper, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on 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 limiting the present application.

[0040] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] A centrifugal pump is a common liquid conveying device, and its working principle is mainly based on the action of centrifugal force. When the centrifugal pump is started, the motor drives the pump shaft to rotate, which in turn drives the impeller to rotate. The rotation of the impeller will produce negative pressure (lower than atmospheric pressure) at the inlet of the pump, so that the liquid is sucked into the pump. After the liquid enters the impeller, it obtains speed and kinetic energy due to the rotation of the impeller. The design of the blades of the impeller makes the liquid be accelerated and thrown out radially during rotation. At the outer edge of the impeller, the speed of the liquid reaches the maximum, and due to the action of centrifugal force, the liquid is thrown out of the impeller and flows out from the pump shell, and then the liquid is discharged through the outlet pipe of the pump under the action of high pressure and transported to the place where it is needed. At present, the water outlet control of the centrifugal pump mainly relies on the switch control of the motor starter or uses the frequency converter to control the start and stop of the pump. However, this control method depending on the circuit may encounter the risk of failure, which may cause the user to fail to cut off the water outlet in time when needed.

[0042] Therefore, in the present embodiment, a centrifugal pump is described, which is provided with a water flow switch 2 on the pump body 1, and the water flow switch 2 is configured to selectively control the flow channel 14 to provide liquid to the water outlet 121, so that the user can conveniently control the opening and closing of the centrifugal pump according to the actual needs, especially in the case of failure of the circuit switch, to ensure the normal use of the centrifugal pump, and the reliability and stability are stronger, and the user's experience is better.

[0043] Specifically, referring to the drawings Figures 1 to 5The centrifugal pump comprises a pump body 1, a power assembly 3 and a water flow switch 2. The pump body 1 is provided with an inlet 111 and an outlet 121. The inlet 111 and the outlet 121 are respectively connected with a flow channel 14 arranged in the pump body 1, so that liquid enters the pump body 1 from the inlet 111 under the action of the centrifugal pump, and then flows to the outlet 121 through the flow channel 14. In addition, the power assembly 3 is arranged in the pump body 1, which serves to push the liquid to flow from the inlet 111 to the outlet 121 along the flow channel 14. Correspondingly, a socket 13 connected with the flow channel 14 is arranged on the pump body 1, and the water flow switch 2 is inserted into the socket 13. The water flow switch 2 is operatively arranged to block the flow channel 14, so as to selectively provide liquid to the outlet 121 through the flow channel 14.

[0044] In the embodiment, the water flow switch 2 is arranged in the socket 13 connected with the flow channel 14. The user can control the blocking and flow of the flow channel 14 by operating the water flow switch 2, so as to control the opening and closing of the outlet 121 of the centrifugal pump, and realize the mechanical control of the centrifugal pump without the participation of electronic components, which is more stable and reliable, and is convenient for the user to adjust the centrifugal pump according to actual needs.

[0045] In one embodiment, referring to the drawings Figures 1 to 3 The embodiment provides a specific way of controlling the centrifugal pump by the water flow switch 2. The water flow switch 2 is provided with a liquid inlet hole 22 matched with the flow channel 14. The water flow switch 2 is arranged in the socket 13, so as to adjust the corresponding arrangement or mutual misalignment of the liquid inlet hole 22 and the flow channel 14 by the water flow switch 2. When the liquid inlet hole 22 and the flow channel 14 are arranged correspondingly, the liquid can flow out through the water flow switch 2 after entering the flow channel 14, so as to flow out from the outlet 121. Correspondingly, when the liquid inlet hole 22 and the flow channel 14 are misaligned, the liquid is hindered by the water flow switch 2 after entering the flow channel 14, so that the liquid cannot flow out from the outlet 121.

[0046] Further, the water flow switch 2 is movably arranged in the socket 13, so as to flexibly arrange the water flow switch 2 in the socket 13 on the pump body 1, and adjust the corresponding arrangement or mutual misalignment of the liquid inlet hole 22 and the flow channel 14.

[0047] Specifically, the water flow switch 2 has a first position and a second position relative to the insertion hole 13 in the extension direction of the insertion hole 13. When the water flow switch 2 is in the first position, the liquid inlet hole 22 is arranged corresponding to the flow channel 14, so that the liquid inlet hole 22 and the flow channel 14 are in a communication state, and then the water inlet 111 and the water outlet 121 can communicate with each other through the flow channel 14, so that the liquid can flow out through the water outlet 121 after flowing into the flow channel 14 through the water inlet 111. In addition, when the water flow switch 2 moves to the second position, the liquid inlet hole 22 and the flow channel 14 are staggered with each other, so that the flow channel 14 is blocked by the water flow switch 2. In this state, the liquid cannot flow from the water inlet 111 to the water outlet 121 through the flow channel 14.

[0048] It can be understood that in the embodiment, the water flow switch 2 is movably arranged in the insertion hole 13, and by adjusting the position of the water flow switch 2, the positional relationship between the liquid inlet hole 22 and the flow channel 14 is adjusted, so as to adjust whether the water outlet 121 and the flow channel 14 are communicated. In use, the user only needs to push the water flow switch 2 to realize the water outlet control of the centrifugal pump, which is very convenient to operate, and the operation mode does not involve the control of electronic elements, and the stability and reliability are higher.

[0049] Further, referring to the drawings Figure 4 , the water flow switch 2 is further described. The water flow switch 2 comprises a valve core 21 and a sealing ring 24, and the sealing ring 24 is sleeved and fixed on the outer side of the valve core 21, so that the water flow switch 2 is in sealed connection with the insertion hole 13 through the sealing ring 24.

[0050] In the embodiment, the sealing ring 24 is arranged, which can improve the friction force of the water flow switch 2 in the insertion hole 13, and can reduce the possibility of unintentional operation of the water flow switch 2, so as to ensure that the centrifugal pump can be adjusted according to the actual needs of the user. In addition, the arrangement of the sealing ring 24 can also avoid that the pumped water flows out through the insertion hole 13, so as to ensure the working efficiency of the centrifugal pump.

[0051] Preferably, an inner groove is arranged on the outer side of the valve core 21 in the circumferential direction of the valve core 21, so as to install and fix the sealing ring 24 on the valve core 21.

[0052] Of course, in actual production application, the liquid inlet hole 22 can also not be arranged on the water flow switch 2, and the water flow switch 2 can be moved to block and open the flow channel 14. Specifically, the insertion hole 13 is arranged at the intersection of the flow channel 14. When the water flow switch 2 is in the second position, the water flow switch 2 passes through the intersection of the insertion hole 13 and the flow channel 14, and the flow channel 14 is blocked by the water flow switch 2, so that the liquid cannot flow into the water outlet 121. The user moves the water flow switch 2 again, so that the water flow switch 2 is in the first position. At this time, the water flow switch 2 is pulled back from the intersection of the insertion hole 13 and the flow channel 14, and the water flow switch 2 does not block, so that the liquid directly flows to the water outlet 121 through the flow channel 14.

[0053] In another embodiment, the water flow switch 2 adjusts the centrifugal pump in another way. The water flow switch 2 is rotatably arranged in the insertion hole 13, and the liquid inlet hole 22 on the water flow switch 2 is in the same straight line with the flow channel 14. By rotating the water flow switch 2, the liquid inlet hole 22 and the flow channel 14 are correspondingly arranged or staggered, thereby controlling the water inlet 111 and the water outlet 121 to be connected through the flow channel 14.

[0054] It can be understood that the water flow switch 2 is rotatably arranged. When the liquid inlet hole 22 is rotated to correspond to the flow channel 14 with the water flow switch 2, the liquid inlet hole 22 is connected with the flow channel 14, thereby enabling the centrifugal pump to pump out the liquid through the water outlet 121. When the liquid inlet hole 22 is rotated to stagger with the flow channel 14 with the water flow switch 2, that is, the two are not connected, the centrifugal pump cannot pump out the liquid through the water outlet 121.

[0055] Of course, in actual production application, there are various structures of the water flow switch 2 to realize whether the centrifugal pump pumps out the liquid, which are not described one by one and are within the protection scope of the present application.

[0056] In addition, the valve core 21 is provided with a mounting groove, and the blocking piece 23 is arranged in the mounting groove. The blocking piece 23 can move or rotate with the adjustment of the valve core 21, adjust the position of the blocking piece 23 relative to the flow channel 14, and thereby adjust the working state of the centrifugal pump. One end of the blocking piece 23 is adapted to extend out of the mounting groove, so that the blocking piece 23 blocks the flow channel 14. Specifically, when the water flow switch 2 is in the first position, the liquid inlet hole 22 corresponds to the flow channel 14 and is connected, and the blocking piece 23 does not block at this time. When the water flow switch 2 is in the second position, the liquid inlet hole 22 is staggered with the flow channel 14, and the blocking piece 23 moves to the corresponding position of the flow channel 14 with the valve core 21, thereby blocking the flow channel 14.

[0057] Correspondingly, when the liquid inlet hole 22 rotates with the rotation of the water flow switch 2, so that the liquid inlet hole 22 is communicated with the flow channel 14, at this time, the blocking piece 23 is staggered with the flow channel 14, and does not play a blocking effect. When the liquid inlet hole 22 is staggered with the flow channel 14, in order to further improve the blocking effect, the blocking piece 23 is rotated to the position corresponding to the flow channel 14.

[0058] Generally, as preferred, the blocking piece 23 can be made of elastic rubber material, and when the liquid inlet hole 22 is communicated with the flow channel 14, the blocking piece 23 is in a compressed state and is arranged in the mounting groove, and when the blocking piece 23 moves to correspond to the flow channel 14, one end of the blocking piece 23 extends from the mounting groove, and plays a role of blocking the flow channel 14.

[0059] Of course, in actual production application, the blocking piece 23 can also include a spring and a blocking block arranged at one end of the spring, and the other end of the spring is fixed to the top wall of the mounting groove, and the elastic member provides the force of the blocking block to block the flow channel 14, which will not be described in detail, and is also within the protection scope of the utility model,

[0060] In one embodiment, referring to the description accompanying drawings Figures 1 to 3 , this embodiment further illustrates the centrifugal pump. Wherein, the pump body 1 includes two parts, which are first shell 11 and second shell 12 respectively. The first shell 11 is internally provided with a receiving cavity, and the power assembly 3 is fixedly installed in the receiving cavity, and the water inlet 111 is arranged on one side of the first shell 11. Correspondingly, the second shell 12 is located on one side of the first shell 11 to jointly form the flow channel 14 with the first shell 11. In addition, the water outlet 121 and the insertion hole 13 are both arranged on the second shell 12. It should be pointed out that the insertion hole 13 can be arranged through the second shell 12, so that both ends of the water flow switch 2 can extend from the insertion hole 13, and the insertion hole 13 can be arranged at only one end to be communicated with the outside, so that one end of the water flow switch 2 extends from the insertion hole 13.

[0061] The power assembly 3 includes a battery 31, a motor 32 and an impeller 33, and an impeller groove is arranged on one side of the first shell 11 close to the second shell 12, for receiving the impeller 33. In addition, the impeller groove is arranged corresponding to the flow channel 14, for being communicated with the water inlet 111 and the flow channel 14. Correspondingly, the motor 32 is electrically connected with the battery 31, and is drivingly connected with the impeller 33.

[0062] It can be understood that the motor 32 can drive the impeller 33 to rotate in the impeller groove under the power supply of the battery 31. The rotation of the impeller 33 generates a negative pressure suction force at the water inlet 111, so that the liquid flows into the impeller groove through the water inlet 111, and then flows out through the flow channel 14 and the water outlet 121. In addition, the water outlet connector 122 is connected to the water outlet 121.

[0063] Further, the second housing 12 is internally fitted with a circuit board 15, which is electrically connected with the battery 31 and the motor 32. Correspondingly, the circuit board 15 is provided with a switch button 16 and a charging connector 17. The switch button 16 controls the opening and closing of the motor 32 through the circuit, thereby controlling the opening and closing of the centrifugal pump. The charging connector 17 is used for charging the battery 31 with an external power supply.

[0064] In addition, the second housing 12 is provided with a switch hole and a charging hole on one side. The switch button 16 and the charging connector 17 are respectively installed in the corresponding switch hole and charging hole, so as to facilitate operation and charging.

[0065] As a preferred, sealing protection pieces are arranged in the switch hole and the charging hole, which are used to prevent external liquid from entering the pump body 1 and affecting the normal use of the centrifugal pump.

[0066] In an embodiment, a filter plate 18 is detachably arranged on the water inlet 111. The external liquid can first pass through the filter plate 18 and then enter the centrifugal pump, which can reduce the damage of external impurities to the internal elements of the centrifugal pump and ensure the service life of the centrifugal pump.

[0067] The filter plate 18 is detachably arranged on the second housing 12 in various ways, such as arranging threaded holes on the filter plate 18 and the second housing 12, connecting the filter plate 18 and the second housing 12 through bolts, or arranging buckles on one end of the filter plate 18, which are suitable for being clamped with the edge of the water inlet 111, so as to realize the detachable connection of the filter plate 18 and the pump body 1.

[0068] Further, referring to the drawings attached Figure 1 The connecting piece 19 is arranged on the periphery of the first housing 11 or the periphery of the second housing 12. The connecting piece 19 plays a role in improving the connection between the centrifugal pump and the container and reducing the possibility of water leakage between the centrifugal pump and the container when the centrifugal pump is used for a bathing device.

[0069] Specifically, the centrifugal pump provided by the embodiment can be used in a bathing device, and the bathing device further comprises a container, i.e., the centrifugal pump is arranged in the container (a water bag or a water bucket, etc.), so that the water contained in the container can be controllably discharged through the centrifugal pump for showering or bathing, etc. Generally, the connecting piece 19 is matched with the container, and can be used for clamping cooperation with the container, so as to prevent the centrifugal pump from moving during use, facilitate the user to wash hair or take a bath outdoors, and improve the use experience.

[0070] In addition, the first adjusting button 25 and the second adjusting button 26 are arranged at two ends of the valve core 21 respectively, and the user can push or rotate the two adjusting buttons to adjust the centrifugal pump. As a preferred, the first adjusting button 25 and the second adjusting button 26 are provided with marks, which are used to remind the user to push or rotate in the correct direction.

[0071] It should be noted that the above embodiments can be freely combined according to the needs. The above is only the preferred embodiment of the application, and it should be pointed out that for those skilled in the art, without departing from the principle of the application, a number of improvements and refinements can be made, which should be considered as the protection scope of the application.

Claims

1. A centrifugal pump, characterized in that The utility model provides a pump, comprising: a pump body, a water inlet and a water outlet are arranged on the pump body, and a flow channel is arranged in the pump body and communicates with the water inlet and the water outlet; a power assembly is arranged in the pump body and is suitable for driving liquid to flow from the water inlet to the water outlet through the flow channel; a water flow switch is arranged in a plug hole in the pump body and communicates with the flow channel, and the water flow switch is arranged in the plug hole and is used for plugging the flow channel to control the flow channel to selectively provide the liquid to the water outlet.

2. A centrifugal pump according to claim 1, characterized in that The water flow switch is provided with a liquid inlet hole matched with the flow channel, and the water flow switch is used for adjusting the liquid inlet hole to correspond to the flow channel or stagger with each other, so that the water inlet and the water outlet are selectively connected through the flow channel.

3. A centrifugal pump according to claim 2, characterized in that The water flow switch is movably arranged in the plug hole, and the water flow switch has a first position and a second position in the plug hole. When the water flow switch is in the first position, the liquid inlet hole corresponds to the flow channel, so that the liquid flows to the water outlet through the flow channel; when the water flow switch is in the second position, the liquid inlet hole is staggered with the flow channel, so that the liquid cannot flow to the water outlet through the flow channel.

4. A centrifugal pump according to claim 2, wherein The water flow switch is rotatably arranged in the plug hole to control the liquid inlet hole to correspond to the flow channel or stagger with each other.

5. A centrifugal pump according to any one of claims 2-4, characterized in that The water flow switch comprises a valve core and a sealing ring, the sealing ring is sleeved and fixed on the outside of the valve core, so that the water flow switch is connected with the plug hole through the sealing ring, and the liquid inlet hole is arranged on the valve core.

6. A centrifugal pump according to claim 5, wherein The water flow switch is provided with a mounting groove, and a blocking piece is arranged in the mounting groove, one end of the blocking piece is arranged to extend out of the mounting groove and is used for plugging the flow channel.

7. A centrifugal pump according to claim 1, wherein The pump body comprises a first shell and a second shell, the first shell is provided with a receiving cavity, the power assembly is arranged in the receiving cavity, and the water inlet is arranged on the first shell. The second shell is arranged on one side of the first shell and surrounds the first shell to form the flow channel, and the water outlet and the plug hole are arranged on the second shell.

8. A centrifugal pump according to claim 7, characterized in that The power assembly comprises a battery, a motor and an impeller, the first shell is provided with an impeller groove on one side close to the second shell, the impeller groove communicates with the water inlet and the flow channel, and the impeller is arranged in the impeller groove. The motor is in transmission connection with the impeller and is in electrical connection with the battery.

9. A centrifugal pump according to claim 8, characterized in that The second shell is provided with a circuit board in electrical connection with the motor and the battery, the circuit board is provided with a switch button and a charging connector; One side of the second shell is provided with a switch hole and a charging hole, the switch button and the charging connector are arranged in the switch hole and the charging hole respectively, and sealing protection pieces are arranged in the switch hole and the charging hole.

10. A centrifugal pump according to claim 9, characterized in that The utility model further comprises a filter plate, and the filter plate is detachably arranged at the water inlet.

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