Centrifugal pump

Abstract

The utility model relates to a centrifugal pump, which belongs to the technical field of water pumps, and comprises a pump shell, a pump cover and a pump cover, the impeller rotor assembly is arranged in the pump shell so as to push liquid to move from the water inlet channel to the water outlet channel and / or the backflow channel; the sealing piece is movably arranged in the pump shell so as to move between a first position and a second position; at the first position, the sealing element blocks the backflow channel, and the water inlet channel is communicated with the water outlet channel; at the second position, the water outlet channel is blocked by the sealing piece, and the water inlet channel is communicated with the backflow channel; when the centrifugal pump is applied to the field of water purifiers, exhaust is automatically completed by means of the position relation between the centrifugal pump and a water tank and the water injection process, additional exhaust operation is not needed, and the centrifugal pump is effectively protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field especially relates to a centrifugal pump. BACKGROUND

[0002] Due to the popularization of the intelligentization of water purifier industry, many functions need intelligent operation, users no longer manually open and close the valve to obtain the required water volume, but realize the function of quantitative water outlet through the control panel on the water purifier.

[0003] In the use process of the micro water pump of the water tank of the water purifier, if there is no check valve in the pipeline, the pipeline can normally discharge water, but during the stop of discharging water, the external pollutants will return to the water tank along with the backwater flow, polluting the inside of the water tank. Therefore, at present, most products are provided with check valves on the pipeline, which also brings some use problems: in the use process of the micro water pump of the water tank of the water purifier, because the pipeline is initially in a water-free state, after water injection, due to the existence of the check valve on the pipeline, the air in the pipeline cannot be discharged, the pump is long-time idling, which leads to the increase of noise in the water pump, the aggravation of wear and tear, the burning of the motor and other adverse phenomena, thereby affecting the normal use and service life of the water pump. SUMMARY

[0004] The embodiment of the utility model provides a centrifugal pump to solve the problem in prior art.

[0005] The embodiment of the utility model adopts the following technical scheme:

[0006] A centrifugal pump, comprising:

[0007] A pump shell having a water inlet channel, a water outlet channel and a backflow channel;

[0008] An impeller rotor assembly arranged inside the pump shell to push the liquid to move from the water inlet channel to the water outlet channel and / or the backflow channel;

[0009] A sealing element movably arranged in the pump shell to move between a first position and a second position;

[0010] When in the first position, the sealing element blocks the backflow channel, and the water inlet channel and the water outlet channel are communicated; when in the second position, the sealing element blocks the water outlet channel, and the water inlet channel and the backflow channel are communicated.

[0011] Preferably, the pump shell is further provided with a solenoid valve assembly for driving the sealing element to move between the first position and the second position.

[0012] Preferably, the solenoid valve assembly has a valve rod, and the sealing element is installed on the execution end of the valve rod.

[0013] Preferably, the pump housing further has a flow passage chamber in communication with the water inlet passage, the water outlet passage and the backflow passage respectively, the flow passage chamber is located between the water outlet passage and the backflow passage, and the execution end of the valve rod extends into the flow passage chamber to drive the sealing member to move in the flow passage chamber; in the first position, the sealing member abuts against a first limiting wall on the side of the flow passage chamber close to the backflow passage; and in the second position, the sealing member abuts against a second limiting wall on the side of the flow passage chamber close to the water outlet passage.

[0014] Preferably, the execution end of the valve rod is provided with a limiting plate coaxial with the valve rod, one end of the sealing member is provided with a insertion hole matched with the valve rod, and a limiting groove matched with the limiting plate is located at the bottom of the insertion hole, and the limiting plate is inserted into the limiting groove to realize the axial limiting of the sealing member relative to the valve rod.

[0015] Preferably, the first limiting wall and the second limiting wall are oppositely arranged.

[0016] Preferably, the inlet of the water inlet passage, the outlet of the water outlet passage and the outlet of the backflow passage are all provided with a pipeline quick-release interface.

[0017] Preferably, the inlet end of the water inlet passage is provided with a flow meter for monitoring the water volume and a Hall induction plate for sensing the electric signal of the flow meter.

[0018] Preferably, the centrifugal pump is installed below a water tank of a water purifier, the inlet of the water inlet passage is in communication with the water outlet pipeline of the water tank, the outlet of the water outlet passage is in communication with the user water outlet pipeline of the water purifier, and the outlet of the backflow passage is in communication with the backflow pipeline of the water tank.

[0019] Preferably, in the second position, the liquid flowing into the water tank fills the water inlet passage and the backflow passage.

[0020] The above-mentioned at least one technical scheme adopted by the embodiment of the utility model can achieve the following beneficial effects:

[0021] 1. The water inlet passage, the water outlet passage, the backflow passage, the impeller rotor assembly and the sealing member capable of moving between the first position and the second position are arranged in the pump housing; in this way, when the centrifugal pump is used, the sealing member is moved to the second position to block the water outlet passage, so that the water inlet passage and the backflow passage are in communication, and the gas in the internal chamber of the pump housing can be discharged through the backflow passage by injecting water into the water inlet passage, that is, the injection process automatically completes the exhaust, and no additional exhaust operation is needed, so the centrifugal pump can be effectively protected and the service life is prolonged compared with the prior art.

[0022] 2. When the water outlet is stopped, the sealing member blocks the water outlet passage to replace the check valve, which not only avoids backflow pollution, but also reduces the pipeline resistance and energy consumption.

[0023] 3. When the traditional water purifier is in sleep mode, the water in the water tank is static, and the sterilization range of the ultraviolet lamp is limited. The centrifugal pump periodically and quantitatively discharges water from the return pipeline, so that the water in different areas of the water tank flows, more water is exposed to the ultraviolet lamp, the sterilization range is expanded, the overall water quality is improved, and the health of the user drinking water is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0025] Figure 1 is a schematic view of the three-dimensional structure of the present application Figure 1 ;

[0026] Figure 2 is a sectional view of the three-dimensional structure of the present application Figure 1 ;

[0027] Figure 3 is a partial sectional view of the electromagnetic valve assembly of the present application;

[0028] Figure 4 is a sectional view of the three-dimensional structure of the present application Figure 2 ;

[0029] Figure 5 is an assembly view of the valve stem and the sealing element of the present application;

[0030] Figure 6 is a schematic view of the three-dimensional structure of the present application Figure 2 .

[0031] Reference signs

[0032] 1-pump housing; 11-inlet passage; 12-outlet passage; 13-return passage; 14-flow passage chamber; 15-first limiting wall; 16-second limiting wall; 17-pipeline quick release interface; 18-flow meter; 19-Hall induction plate; 2-impeller rotor assembly; 3-sealing element; 31-receptacle; 32-limiting groove; 4-electromagnetic valve assembly; 41-valve stem; 42-limiting plate. DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects of the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0034] The technical solutions provided by each embodiment of the present application will be described in detail below in combination with the drawings.

[0035] Referring to Figures 1 to 6 The utility model embodiment provides a centrifugal pump, including pump shell 1, impeller rotor subassembly 2 and sealing element 3.

[0036] Pump shell 1 has water inlet channel 11, water outlet channel 12 and backflow channel 13.

[0037] Impeller rotor subassembly 2 is arranged in the pump shell 1 to push liquid to move from water inlet channel 11 to water outlet channel 12 and / or backflow channel 13. Specifically, the impeller rotor subassembly 2 is a conventional prior art design, and its structure and operating principle are not repeated here.

[0038] Sealing element 3 is movably arranged in pump shell 1 (the sealing element is generally configured of rubber material) to move between a first position and a second position; when in the first position, the sealing element 3 blocks the backflow channel 13, and the water inlet channel 11 is in communication with the water outlet channel 12; when in the second position, the sealing element 3 blocks the water outlet channel 12, and the water inlet channel 11 is in communication with the backflow channel 13.

[0039] This embodiment is provided with water inlet channel 11, water outlet channel 12, backflow channel 13, impeller rotor subassembly 2 and sealing element 3 capable of moving between a first position and a second position in the pump shell 1; in this way, when the centrifugal pump is in use, the sealing element 3 is moved to the second position to block the water outlet channel 12, so that the water inlet channel 11 is in communication with the backflow channel 13, and by injecting water into the water inlet channel 11, the gas in the chamber of the pump shell 1 can be discharged through the backflow channel 13 in advance, that is, the discharging process is automatically completed by means of the water injection process, without the need for additional discharging operation, which can effectively protect the centrifugal pump and prolong its service life compared with the prior art.

[0040] In some practical applications, the centrifugal pump is applied in the field of water purifiers and is installed below the water tank of the water purifier; the inlet of the water inlet channel 11 is in communication with the water outlet pipe of the water tank, the outlet of the water outlet channel 12 is in communication with the user water outlet pipe of the water purifier, and the outlet of the backflow channel 13 is in communication with the backflow pipe of the water tank.

[0041] When the water tank of the water purifier starts to inject water, since the centrifugal pump is installed below the water tank, under the action of atmospheric pressure, the air originally present in the chamber of the pump shell 1 will flow along the backflow channel 13 and be naturally discharged back into the water tank through the backflow pipe of the water tank in communication therewith, thereby preparing for subsequent water pumping, and this process does not require additional manual intervention or the use of other air discharge equipment. At this time, the sealing element 3 is in the second position, and the liquid flowing from the water tank fills the water inlet channel 11 and the backflow channel 13.

[0042] When the impeller rotor assembly 2 starts to work, the sealing element 3 moves to the first position, blocking the backflow channel 13, and the inlet channel 11 is in communication with the outlet channel 12. Under the strong centrifugal force generated by the high-speed rotation of the impeller rotor assembly 2, the water in the water tank outlet pipeline enters the pump shell 1 through the inlet channel 11, and then smoothly passes through the outlet channel 12, and finally is discharged from the user outlet pipeline of the water purifier for the user to use.

[0043] Once the water output reaches the preset requirement, the user outlet pipeline stops discharging water, and at the same time, the sealing element 3 moves to the second position to accurately block the outlet channel 12, so that the inlet channel 11 is in communication with the backflow channel 13. This action ensures that the water in the user outlet pipeline cannot flow back in the opposite direction, guarantees that the water in the water tank will not be contaminated, and avoids the situation that the pump cannot discharge water due to air idling during subsequent water discharge.

[0044] In summary, when the centrifugal pump is applied in the field of water purifiers, it has at least the following advantages: When the traditional micro water pump starts, the air in the pipeline is difficult to discharge, often causing idling problems, causing noise, wear and even motor burnout. The centrifugal pump uses its position relationship with the water tank to automatically complete the air discharge during the water injection process, without the need for additional air discharge operation, effectively protecting the centrifugal pump, prolonging the service life, and reducing the maintenance frequency.

[0045] If the traditional micro water pump of the past does not add a check valve to the pipeline, external contaminants are easy to flow back and contaminate the water tank when it is stopped; adding a check valve will increase the resistance of the pipeline, and the air in the pipeline is difficult to discharge. The sealing element 3 of the centrifugal pump of the present embodiment blocks the outlet channel 12 when water discharge is stopped, replacing the check valve, which not only avoids backflow contamination, but also reduces the resistance of the pipeline and reduces energy consumption.

[0046] The centrifugal pump can closely cooperate with the set water discharge requirement by precisely controlling the position switching of the sealing element 3, and can cut off the water flow in time when the set water discharge amount is reached, ensuring that each water discharge is accurate and quantitative, meeting the diversified water use requirements of users, and improving the use experience of the water purifier.

[0047] In addition, when the traditional water purifier is in sleep mode, the water in the water tank is static, and the germicidal range of the ultraviolet lamp is limited. Regular and quantitative water discharge using the centrifugal pump can make the water in different areas of the water tank flow, expose more water to the ultraviolet lamp, expand the germicidal range, improve the overall water quality, and protect the health of the user's drinking water. Specifically, when the impeller rotor assembly 2 works, the water in the water tank outlet pipeline enters the pump shell 1 through the inlet channel 11, and then returns to the water tank through the backflow channel 13. The water in the water tank flows under the circulating turbulent flow of the centrifugal pump, expands the germicidal range, and improves the overall water quality.

[0048] Reference Figures 2 to 3As shown, in some practical applications, based on the centrifugal pump described above, the pump shell 1 is further provided with an electromagnetic valve assembly 4 for driving the sealing member 3 to move between the first position and the second position. Specifically, the electromagnetic valve assembly 4 has a valve rod 41, and the sealing member 3 is installed on the execution end of the valve rod 41; the pump shell 1 further has a flow channel chamber 14 in communication with the water inlet channel 11, the water outlet channel 12 and the return channel 13 respectively, the flow channel chamber 14 is located between the water outlet channel 12 and the return channel 13, and the execution end of the valve rod 41 extends into the flow channel chamber 14 (at this time the sealing member is also located in the flow channel chamber) to drive the sealing member 3 to move in the flow channel chamber 14; in the first position, the sealing member 3 abuts against a first limiting wall 15 on the side of the flow channel chamber 14 close to the return channel 13; in the second position, the sealing member 3 abuts against a second limiting wall 16 on the side of the flow channel chamber 14 close to the water outlet channel 12.

[0049] In this embodiment, after the electromagnetic valve assembly 4 is connected to the entire centrifugal pump system, it drives the valve rod 41 to perform linear motion by relying on the electromagnetic force generated by itself after being powered on. Since the sealing member 3 is installed on the execution end of the valve rod 41, the extension and retraction of the valve rod 41 directly drives the sealing member 3 to move in the flow channel chamber 14 of the pump shell 1. When the electromagnetic valve is powered on, the valve rod 41 extends or retracts according to the preset program, accurately pushes the sealing member 3, and makes it move from one end to the other end in the flow channel chamber 14, thereby realizing the switching of the sealing member 3 between the first position and the second position.

[0050] The first limiting wall 15 (in this embodiment, the first limiting wall is located on the end face of the return channel inlet) and the second limiting wall 16 (in this embodiment, the second limiting wall is located on the end face of the water outlet channel inlet) provided in the flow channel chamber 14 provide clear termination points for the movement of the sealing member 3. When the sealing member 3 abuts against the first limiting wall 15, it is in the first position, at which time the return channel 13 is blocked and the water inlet channel 11 is in communication with the water outlet channel 12; when the sealing member 3 abuts against the second limiting wall 16, it reaches the second position, accurately blocks the water outlet channel 12, and makes the water inlet channel 11 in communication with the return channel 13. In some practical applications, the first limiting wall 15 and the second limiting wall 16 are oppositely arranged. When the valve rod 41 of the electromagnetic valve assembly 4 moves, the sealing member 3 installed on the execution end of the valve rod 41 moves along the straight line trajectory between the two walls, ensuring that the sealing member 3 can be accurately positioned each time, and realizing reliable channel blocking and opening.

[0051] The electromagnetic valve assembly 4, as a relatively mature existing technical means, can quickly and accurately drive the sealing member 3 to move according to the preset electrical signal instruction, and the control accuracy is greatly improved compared with moving the sealing member 3 by relying on mechanical structure.

[0052] In some practical applications, the connection structure between the valve rod 41 of the electromagnetic valve assembly 4 and the sealing element 3 is optimized. Specifically, as shown in Figure 3 and Figure 5 , the execution end of the valve rod 41 is provided with a limiting plate 42 coaxial therewith, one end of the sealing element 3 has a plug hole 31 matched with the valve rod 41, and a limiting groove 32 at the bottom of the plug hole 31 matched with the limiting plate 42, and the limiting plate 42 is inserted into the limiting groove 32 to achieve the axial limiting of the sealing element 3 relative to the valve rod 41. Since the sealing element 3 is usually made of flexible materials such as rubber, the sealing element 3 can be easily sleeved on the limiting plate 42 at the end of the valve rod 41, while ensuring a certain axial limiting, and when the sealing performance of the sealing element 3 decreases after long-term use, the sealing element 3 can be replaced more easily.

[0053] In some practical applications, as shown in Figure 1 , Figure 2 and Figure 4 , the inlet of the water inlet channel 11, the outlet of the water outlet channel 12 and the outlet of the backflow channel 13 are all installed with a pipeline quick release interface 17. When applied in the field of water purifiers, in the assembly, daily maintenance and repair scenarios of the water purifier, the staff can quickly complete the connection or disassembly of each channel and the corresponding pipeline without the help of complex tools.

[0054] In some practical applications, as shown in Figure 1 , Figure 4 and Figure 6 , the inlet end of the water inlet channel 11 is installed with a flow meter 18 for monitoring water flow, and a Hall induction plate 19 for sensing the electric signal of the flow meter.

[0055] The flow meter 18 is responsible for detecting the water flow through the inlet of the water inlet channel 11, and its working principle adopts electromagnetic induction principle. When water flows through the measurement area inside the flow meter 18, it will cause a change in the magnetic field. The Hall induction plate 19 is electrically connected with the flow meter 18, and the Hall induction plate 19 works by Hall effect. The Hall induction plate 19 in the changing magnetic field environment will generate a potential difference related to the water flow speed, which is output in the form of an electric signal. Since there is a corresponding relationship between water flow speed and water flow, the corresponding electric signal of the detected potential difference can accurately deduce the real-time water flow data.

[0056] With the cooperation of the Hall induction plate 19 and the flow meter 18, the water flow into the centrifugal pump water inlet channel 11 can be accurately measured, and the operation and closing of the electromagnetic valve assembly 4 and the impeller rotor assembly 2 can be controlled.

[0057] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A centrifugal pump, characterized in that The centrifugal pump comprises: a pump shell (1) having an inlet channel (11), an outlet channel (12) and a return channel (13); a vane rotor assembly (2) arranged in the pump shell (1) to push liquid to move from the inlet channel (11) to the outlet channel (12) and / or the return channel (13); a sealing member (3) movably arranged in the pump shell (1) to move between a first position and a second position; when in the first position, the sealing member (3) blocks the return channel (13), and the inlet channel (11) is in communication with the outlet channel (12); when in the second position, the sealing member (3) blocks the outlet channel (12), and the inlet channel (11) is in communication with the return channel (13).

2. A centrifugal pump according to claim 1, characterized in that The pump shell (1) is further provided with an electromagnetic valve assembly (4) for driving the sealing member (3) to move between the first position and the second position.

3. A centrifugal pump according to claim 2, characterized in that The electromagnetic valve assembly (4) has a valve rod (41), and the sealing member (3) is arranged on an execution end of the valve rod (41).

4. A centrifugal pump according to claim 3, characterized in that The pump shell (1) further has a flow passage chamber (14) in communication with the inlet channel (11), the outlet channel (12) and the return channel (13) respectively, the flow passage chamber (14) is located between the outlet channel (12) and the return channel (13), the execution end of the valve rod (41) extends into the flow passage chamber (14) to drive the sealing member (3) to move in the flow passage chamber (14); when in the first position, the sealing member (3) abuts against a first limiting wall (15) on one side of the flow passage chamber (14) close to the return channel (13); when in the second position, the sealing member (3) abuts against a second limiting wall (16) on one side of the flow passage chamber (14) close to the outlet channel (12).

5. A centrifugal pump according to claim 3, wherein The execution end of the valve rod (41) is provided with a limiting plate (42) coaxial with the valve rod (41), one end of the sealing member (3) has a plug hole (31) matched with the valve rod (41), and a limiting groove (32) matched with the limiting plate (42) is located at the bottom of the plug hole (31), and the limiting plate (42) is inserted into the limiting groove (32) to realize the axial limiting of the sealing member (3) relative to the valve rod (41).

6. A centrifugal pump according to claim 4, wherein The first limiting wall (15) and the second limiting wall (16) are oppositely arranged.

7. A centrifugal pump according to claim 1, wherein The inlet of the inlet channel (11), the outlet of the outlet channel (12) and the outlet of the return channel (13) are all provided with a pipeline quick release interface (17).

8. A centrifugal pump according to claim 1, wherein The inlet end of the inlet channel (11) is provided with a flow meter (18) for monitoring water quantity and a Hall induction plate (19) for sensing the electric signal of the flow meter.

9. A centrifugal pump according to any one of claims 1-8, characterized in that The centrifugal pump is arranged below a water tank of a water purifier, the inlet of the inlet channel (11) is in communication with the water outlet pipeline of the water tank, the outlet of the outlet channel (12) is in communication with the user water outlet pipeline of the water purifier, and the outlet of the return channel (13) is in communication with the return pipeline of the water tank.

10. A centrifugal pump according to claim 9, characterized in that When in the second position, the liquid flowing from the water tank fills the inlet channel (11) and the return channel (13).

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