CN117231514A - Multistage centrifugal pump with self-cleaning function and use method thereof - Google Patents
Multistage centrifugal pump with self-cleaning function and use method thereof Download PDFInfo
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- CN117231514A CN117231514A CN202311401545.9A CN202311401545A CN117231514A CN 117231514 A CN117231514 A CN 117231514A CN 202311401545 A CN202311401545 A CN 202311401545A CN 117231514 A CN117231514 A CN 117231514A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 230000037237 body shape Effects 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 12
- 239000007787 solid Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 7
- 239000005977 Ethylene Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- -1 polyoxyethylene Polymers 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 230000003213 activating effect Effects 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 150000003904 phospholipids Chemical class 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application belongs to the technical field of centrifugal pumps, and provides a multistage centrifugal pump with a self-cleaning function and a use method thereof, wherein the multistage centrifugal pump comprises a pump body assembly and a cleaning assembly; the pump body assembly comprises a pump shaft, at least two centrifugal impellers, a diversion shell and a motor, wherein the centrifugal impellers are arranged on the pump shaft, the pump shaft is rotatably arranged in the diversion shell, and the motor is connected with the rotating shaft; the cleaning component is arranged between two adjacent centrifugal impellers; the cleaning assembly comprises an energizing coil and at least two shifting blocks; the energizing coil is arranged in the pump shaft, and the opposite ends of the two shifting blocks are provided with magnetic poles which are attracted to each other. Because the shifting blocks rotate along with the pump shafts, the normal conveying path of the cleaning medium is broken, so that the cleaning medium impacts the inner wall of the diversion shell, thereby helping to remove any impurities or residues on the cleaning medium, and realizing the automatic cleaning function.
Description
Technical Field
The application belongs to the technical field of centrifugal pumps, and particularly relates to a multistage centrifugal pump with a self-cleaning function.
Background
Multistage centrifugal pumps have wide application in the chemical industry, particularly in the delivery of highly reactive, reactive media such as 1-butene, ethylene, and the like. These liquid media are highly reactive at specific temperatures and pressures, so that stability of the operating conditions must be ensured during pumping to prevent unwanted chemical reactions and material denaturation.
In conventional multistage centrifugal pump designs, the internal structure of the inducer is often specially designed to meet the hydrodynamic requirements. When transporting media such as 1-butene, ethylene, etc., these media may be converted to floc under low temperature conditions due to temperature changes or other external factors. Such flocs may adhere to the inner wall of the pod.
When the floc adheres to the inner wall of the pod, it may affect the flowability of the fluid, resulting in reduced delivery efficiency and even possible clogging. This not only affects the efficiency of the pump, but may also lead to damage to the pump, thereby increasing maintenance and replacement costs. In addition, the attached flocs may also react with the transported medium unnecessarily chemically, producing harmful byproducts, which may interfere with the production process. Therefore, how to effectively solve the problem and improve the operation efficiency and stability of the pump is a technical problem to be solved urgently in the chemical industry.
Disclosure of Invention
The application provides a multistage centrifugal pump with a self-cleaning function and a use method thereof, and aims to solve the problems set forth in the background technology.
The application is realized in such a way that the multistage centrifugal pump with the self-cleaning function comprises a pump body assembly and a cleaning assembly; the pump body assembly comprises a pump shaft, at least two centrifugal impellers, a diversion shell and a motor, wherein the centrifugal impellers are arranged on the pump shaft, the pump shaft is rotatably arranged in the diversion shell, and the motor is connected with the rotating shaft and used for driving the rotating shaft to rotate; the cleaning component is arranged between two adjacent centrifugal impellers; the cleaning assembly comprises an energizing coil and at least two shifting blocks; the inside of pump shaft is hollow structure, just be provided with relatively on the pump shaft the holding cavity of shifting block, the power-on coil set up in the inside of pump shaft, and be located two between the shifting block, two the opposite one end of shifting block is provided with the magnetic pole of mutual attraction.
Optionally, a multistage centrifugal pump that possesses self-cleaning function still includes the cooling casing, the inside of cooling casing is provided with the motor seal shell, the motor seal shell cover is located the outside of motor, and will the motor seal in the inside of motor seal shell, the cooling casing with form the medium flow space between the motor seal shell, the cooling casing is kept away from the one end of water conservancy diversion casing is provided with output pipeline.
Optionally, the cooling housing is threaded with a conduit passing through the cooling housing and the motor seal housing.
Optionally, a mounting shaft is fixedly connected between the two accommodating cavities, and the energizing coil is sleeved on the mounting shaft.
Optionally, a sliding groove is formed in the inner wall of the accommodating cavity, and a sliding seat matched with the sliding groove is arranged on the magnetic pole.
Optionally, the multistage centrifugal pump with the self-cleaning function further comprises a power supply assembly, wherein the power supply assembly is used for supplying power to the power-on coil.
Optionally, the power supply assembly comprises a bearing, a permanent magnet, a power generation coil, a rectifier and a storage battery; the bearing is fixedly connected with the inner wall of the pump shaft, the permanent magnet is connected with the bearing through a rotating shaft, and the permanent magnet is in rotary connection with the pump shaft through the bearing; the power generation coil bypasses the permanent magnet and is connected with the rectifier, the rectifier is fixedly connected with the inner wall of the pump shaft, the rectifier is connected with the storage battery, and the storage battery is used for supplying power for the power-on coil.
Optionally, a space diversion structure is adopted in the diversion shell.
The use method of the multistage centrifugal pump with the self-cleaning function is used for implementing the multistage centrifugal pump with the self-cleaning function, and comprises the following steps of:
s1: when cleaning is needed, the lower end of the diversion shell is communicated with a cleaning medium;
s2: starting a motor to enable the pump shaft and a centrifugal impeller connected with the pump shaft to start rotating;
s3: energizing the energizing coil to generate a magnetic field;
s4: the two shifting blocks extend out of the inner part of the accommodating cavity by utilizing the repulsive force between the magnetic field generated by the electrified coil and the magnetic poles of the shifting blocks;
s5: because of the rotation of the shifting block and the interference of the shifting block on the cleaning medium, the cleaning medium generates turbulent flow in the diversion shell, so that the inner wall of the diversion shell is washed and cleaned;
s6: after cleaning, the power-on coil is stopped, and the two shifting blocks automatically return to the accommodating cavity due to the mutual attraction of the magnetic poles, so that the shape of the smooth shaft body of the pump shaft is restored.
The self-cleaning multistage centrifugal pump has the beneficial effects that the motor of the multistage centrifugal pump with the self-cleaning function drives the pump shaft and the centrifugal impeller to rotate, and cleaning media are conveyed. When the energizing coil is energized, a magnetic field is generated, and repulsive interaction occurs between the magnetic field and the magnetic poles, so that the two opposite magnetic poles are pushed away. This action in turn drives the two dials out of the housing. As the cleaning medium passes the first centrifugal impeller, it will next encounter these rotating paddles. As the dials follow the pump shaft, they break the normal transport path of the cleaning medium, resulting in turbulence of the cleaning medium. The cleaning medium in the turbulent flow state can impact the inner wall of the diversion shell, thereby helping to remove any impurity or residue on the cleaning medium and realizing the automatic cleaning function. Most importantly, there is no need to disassemble the centrifugal pump at all during this cleaning process.
Under turbulent flow conditions, substances adhering to the inner wall of the diversion housing are transported and reacted with the cleaning medium more quickly due to the enhanced mixing of the fluid, which helps to remove dirt from the inner wall. Turbulence creates eddies and vortices that pick up and disperse small particles deposited on the inner walls of the pump, thereby reducing the chance of particle deposition.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a multistage centrifugal pump with self-cleaning function according to the present application;
FIG. 2 is an exploded view of a multistage centrifugal pump with self-cleaning function according to the present application;
FIG. 3 is a schematic cross-sectional view of a pump shaft with self-cleaning function according to the present application;
FIG. 4 is a perspective view of a pump shaft and impeller with self-cleaning function provided by the application;
FIG. 5 is a schematic perspective view of a self-cleaning block according to the present application;
FIG. 6 is a schematic perspective view of an energizing coil and a mounting shaft with self-cleaning function according to the present application;
fig. 7 is a schematic perspective view of a power generation coil with self-cleaning function according to the present application;
fig. 8 is a schematic perspective view of a permanent magnet with self-cleaning function according to the present application;
fig. 9 is a schematic diagram of a partially cross-sectional structure of a flow guiding housing with self-cleaning function according to the present application.
The reference numerals are as follows:
1-pump body assembly, 11-pump shaft, 12-centrifugal impeller, 13-diversion shell, 14-motor, 2-cooling shell, 21-motor sealing shell, 22-output pipeline, 23-spool, 3-cleaning component, 31-energizing coil, 32-shifting block, 33-accommodating cavity, 34-mounting shaft, 35-magnetic pole, 36-chute, 37-sliding seat, 4-power supply assembly, 41-bearing, 42-permanent magnet, 421-rotating shaft, 43-generating coil, 44-rectifier and 45-storage battery.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
The terms "first" and "second" and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps, operations, components, or modules is not limited to the particular steps, operations, components, or modules listed but may optionally include additional steps, operations, components, or modules inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
As shown in fig. 1 to 8, a multistage centrifugal pump with a self-cleaning function of an exemplary embodiment includes a pump body assembly 1 and a cleaning member 3; the pump body assembly 1 comprises a pump shaft 11, at least two centrifugal impellers 12, a diversion shell 13 and a motor 14, wherein the centrifugal impellers 12 are arranged on the pump shaft 11, the pump shaft 11 is rotatably arranged in the diversion shell 13, and the motor 14 is connected with the rotating shaft 11 and is used for driving the rotating shaft 11 to rotate; the cleaning assembly 3 is arranged between two adjacent centrifugal impellers 12; the cleaning assembly 3 comprises an energizing coil 31 and at least two dials 32; the inside of pump shaft 11 is hollow structure, just be provided with relatively on the pump shaft 11 the holding cavity 33 of shifting block 32, the electric coil 31 set up in the inside of pump shaft 11, and be located two between the shifting block 32, two the opposite one end of shifting block 32 is provided with the magnetic pole 35 of mutual attraction.
More specifically, in the normal state, there is attraction force between the mutually attracted magnetic poles 35, and under the attraction action of the magnetic poles 35, the two shifting blocks 32 approach each other and are all located in the accommodating cavity 33, and at this time, the pump shaft 11 takes on a smooth shaft shape. In the use process, the motor 14 drives the pump shaft 11 to rotate, the rotation of the pump shaft 11 drives the centrifugal impeller 12 to rotate, as shown in fig. 1, 2 and 4, the rotation of the centrifugal impeller 12 enables conveyed media to be sucked from the lower side of the centrifugal impeller 12, and then the media are conveyed upwards in the guide shell 13 under the action of centrifugal force, so that the media move upwards in the guide shell 13. This circulation process enables the transport of the medium to be effected, in which the setting block 32 is located in the accommodation chamber 33, at which time the pump shaft 11 is a smooth shaft, avoiding the extension of the setting block 32 affecting the transport efficiency of the medium.
In this embodiment, the pump shaft 11 is made of austenitic stainless steel, titanium or titanium alloy. Wherein the content of nickel in the austenitic stainless steel is 10% -14% of the total mass, and the content of molybdenum (Mo) is 2% -3% of the total mass.
When the multistage centrifugal pump needs to be cleaned, the lower end of the diversion shell 13 is stretched into the cleaning medium or communicated with the cleaning medium through a pipeline, then the motor 14 is started, the electrified coil 31 is electrified, and the motor 14 drives the pump shaft 11 and the centrifugal impeller 12 to rotate, so that the cleaning medium is conveyed. When the energizing coil 31 is energized, a magnetic field is generated, which repels the magnetic poles 35, causing the two opposing magnetic poles 35 to be pushed apart. This action in turn drives the two dials 32 out of the housing cavity 33. As the cleaning medium passes the first centrifugal impeller 12, it will next encounter these rotating paddles 32. As the dials 32 follow the rotation of the pump shaft 11, they break the normal conveying path of the washing medium, resulting in turbulence of the washing medium. The cleaning medium in the turbulent flow state can impact the inner wall of the diversion shell 13, thereby helping to remove any impurities or residues on the cleaning medium and realizing the automatic cleaning function. Most importantly, there is no need to disassemble the centrifugal pump at all during this cleaning process.
Turbulence, as opposed to laminar flow, is a chaotic flow regime when liquid or gas flows. Turbulence is characterized by a high degree of mixing, large flow velocity variations and rapid irregularities in the flow direction. The turbulent flow of the cleaning medium increases friction with the inner wall of the deflector housing 13. This friction helps to remove sediment or dirt adhering to the inner wall. Turbulent flow produces a strong mixing effect. This mixing effect helps to disperse particles or other substances deposited on the inner wall of the deflector housing 13, making them more easily washed away by the cleaning liquid. Under turbulent flow conditions, substances adhering to the inner wall of the deflector housing 13 are transported and reacted with the cleaning medium more quickly due to the enhanced mixing of the fluid, which helps to remove dirt from the inner wall. Turbulence creates eddies and vortices that pick up and disperse small particles deposited on the inner walls of the pump, thereby reducing the chance of particle deposition.
Wherein the cleaning medium may be, but is not limited to, the following:
clear water: is suitable for most cases, especially when the sediment inside the deflector housing 13 is easily dissolved or rinsed with water. For example, when a multistage centrifugal pump delivers some inorganic salt solution or sugar solution, clean water can effectively clean the inside.
Alkaline solution: when grease, protein or other organic matter accumulates in the pump, an alkaline solution such as sodium hydroxide solution can help break down and remove the matter.
Acidic solution: for certain mineral deposits, such as calcium or magnesium deposits, the cleaning may be performed using dilute hydrochloric acid or other suitable acid.
Ethanol or isopropanol: for certain organic substances that are difficult to dissolve in water, such as certain resins or polymers, alcohols can be an effective cleaning medium.
The cleaning media used for the transport of 1-butene and ethylene were:
warm clear water: the solid deposits of 1-butene and ethylene formed as a result of the temperature drop are helped to redissolve or soften by increasing the temperature of the water. The warm water helps to increase the dissolution rate and makes the solid deposits easier to clean.
Low polarity organic solvent: such as n-hexane or n-heptane, may be used to clean the ethylene or 1-butene residue. These solvents act as detergents during cleaning to aid in the removal of solid 1-butene and ethylene from the surface of the pump.
Surfactant solution: helping to clean solid deposits of 1-butene and ethylene from the interior surfaces of the pump. Specifically, polyoxyethylene alcohol ether, alkylbenzene sulfonate or phospholipid.
As an alternative embodiment, a multistage centrifugal pump with self-cleaning function further includes a cooling housing 2, a motor sealing housing 21 is disposed inside the cooling housing 2, the motor sealing housing 21 is sleeved outside the motor 14, and seals the motor 14 inside the motor sealing housing 21, a medium flow space is formed between the cooling housing 2 and the motor sealing housing 21, and an output pipe 22 is disposed at one end of the cooling housing 2 away from the diversion housing 13.
The main function of the cooling housing 2 is to provide cooling for the motor 14. Specifically, the medium passing through the guide housing 13 flows into the medium flow space between the cooling housing 2 and the motor hermetic shell 21, and is finally discharged through the output pipe 22. In this flow process, the medium takes away the heat generated by the motor 14 during operation, thereby achieving automatic cooling of the motor, ensuring that the motor maintains a suitable operating temperature during continuous operation, and avoiding possible performance degradation or damage due to overheating.
The cooling design mode ensures the efficient and stable operation of the multistage centrifugal pump. First, by flowing the medium in the space between the cooling housing 2 and the motor sealing case 21, heat generated by the motor 14 in operation can be effectively taken away. This not only increases the operating efficiency of the motor 14, but also significantly extends its useful life, as sustained overheating is a common cause of early motor damage.
Second, this design also avoids the need for additional cooling systems or accessories, thereby saving cost and space. When the motor 14 is operated, the medium naturally flows through the medium flow space and is finally discharged through the output pipe 22, and this process not only achieves cooling of the motor, but also provides a smoother transmission path for the medium, thereby improving the overall working efficiency.
Furthermore, since the medium provides a cooling effect when passing the motor 14, this means that the centrifugal pump can be kept at a low temperature during continuous, long-term operation, thereby ensuring that the centrifugal impeller 12, the pump shaft 11 and other critical components are not damaged by overheating, ensuring the stability and safety of the overall apparatus.
As an alternative embodiment, the cooling housing 2 is provided with a conduit 23, which conduit 23 passes through the cooling housing 2 and the motor sealing housing 21. The wire pipe 23 is used for accommodating wires, one end of each wire is connected with the motor 14, and the other end of each wire is connected with a power supply and a motor controller, so that the operation of the motor 14 is controlled. The motor 14 is a conventional servo motor, and its specific working principle and control manner are well known to those skilled in the art, and will not be described in detail herein.
As an alternative embodiment, a mounting shaft 34 is fixedly connected between the two accommodating cavities 33, and the energizing coil 31 is sleeved on the mounting shaft 34. The installation axle 34 is used for installing the electric coil 31, provides the installation carrier for electric coil 31, and on the other hand installation axle 34 is connected between two accommodation cavity 33 that set up relatively, can effectually improve the structural stability of pump shaft 11.
As an alternative embodiment, the inner wall of the accommodating cavity 33 is provided with a sliding groove 36, and the magnetic pole 35 is provided with a sliding seat 37 matched with the sliding groove 36. The setting of the sliding seat 37 and the sliding groove 36 can further improve the stability of the extending or retracting of the shifting block 32 to the accommodating cavity 33, and ensure the stable operation of the shifting block 32.
As an alternative embodiment, a multistage centrifugal pump with self-cleaning function further comprises a power supply assembly 4, said power supply assembly 4 being adapted to supply said energizing coil 31. The power supply assembly 4 is a key component for supplying power to the energizing coil 31 in a multistage centrifugal pump. The normal operation of the energizing coil 31 relies on a stable and continuous power supply, while the power supply assembly 4 ensures that this requirement is met.
As an alternative embodiment, the power supply assembly 4 includes a bearing 41, a permanent magnet 42, a power generation coil 43, a rectifier 44, and a battery 45; the bearing 41 is fixedly connected with the inner wall of the pump shaft 11, the permanent magnet 42 is connected with the bearing 41 through a rotating shaft 421, and the permanent magnet 42 is in rotary connection with the pump shaft 11 through the bearing 41; the power generation coil 43 bypasses the permanent magnet 42 and is connected with the rectifier 44, the rectifier 44 is fixedly connected with the inner wall of the pump shaft 11, the rectifier 44 is connected with the storage battery 45, and the storage battery 45 is used for supplying power to the power supply coil 31.
Further, during the rotation of the pump shaft 11, the rotation of the pump shaft 41 does not drive the permanent magnet 42 to rotate due to the design of the bearing 41, that is, the permanent magnet 42 is in a stationary state. Even though the permanent magnet 42 is driven to rotate by the friction force Wei Jiao existing in the bearing 41 itself, the permanent magnet 42 cannot reach 11 revolutions. In the rotation process of the pump shaft 11, the storage battery 45 and the rectifier 44 are driven to rotate, the power generation coil 43 rotates relative to the permanent magnet 42, and the power generation coil 43 cuts a magnetic field generated by the permanent magnet 42. According to faraday's law of electromagnetic induction, an electromotive force is induced in the power generation coil 43, and a current is generated. The current passes through the rectifier 44 and is converted by the rectifier 44 into direct current, which charges the battery 45, the battery 45 storing electrical energy for powering the energizing coil 31. Wherein the battery 45 is connected to the energizing coil 31 via a solid state switch (not shown). Wherein the solid state switch may be, but is not limited to, the Omron G3VM series or the Vishay VO1400AEFTR. The solid state switch is controlled to be opened and closed in a wireless control mode, wherein an RF module can be used for wireless control. For example, the nRF24L01+ of Nordic Semiconductor or ESP8266/ESP32 module of Espressif.
When the user requires the battery 45 to power the powered coil 31, a wireless "on" signal is sent to the RF module inside the pump shaft via the external controller. The RF module receives the "on" signal and provides a voltage to the control terminal of the solid state switch to close it. Once the solid state switch is closed, the battery 45 may power the energizing coil 31. When power is no longer needed, the user may send a wireless "off signal, and the RF module, upon receipt, disconnects the voltage supply to the solid state switch, thereby disconnecting its output.
As an alternative embodiment, the inside of the diversion housing 13 adopts a space diversion structure. The design of the space diversion structure is beneficial to improving the stability and efficiency of hydraulic performance, and the whole installation space of the pump is reduced due to the smaller radial dimension. Further, the inside of the guide housing 13 is provided with an impeller accommodating chamber 131 and a medium conveying chamber 132 having arc structures, and the radial dimension thereof is smaller than that of the conventional right angle design. In addition, a helical vane 133 may be provided in the medium delivery chamber 132 to guide the flow of the medium.
The use method of the multistage centrifugal pump with the self-cleaning function is used for implementing the multistage centrifugal pump with the self-cleaning function, and comprises the following steps of:
s1: when cleaning is needed, the lower end of the diversion shell 13 is communicated with a cleaning medium;
s2: starting the motor 14 to start the pump shaft 11 and the centrifugal impeller 12 connected with the pump shaft to rotate;
s3: energizing the energizing coil 31 to generate a magnetic field;
s4: the two poking blocks 32 are extended out from the inside of the accommodating cavity 33 by using the repulsive force between the magnetic field generated by the energizing coil 31 and the magnetic poles 35 of the poking blocks 32;
s5: due to the rotation of the shifting block 32 and the interference of the shifting block on the cleaning medium, the cleaning medium generates turbulent flow in the diversion shell 13, so that the inner wall of the diversion shell 13 is washed and cleaned;
s6: after the cleaning is completed, the energizing coil 31 is stopped, and the two shifting blocks 32 automatically return to the accommodating cavity 33 due to the mutual attraction of the magnetic poles 35, so that the smooth shaft body shape of the pump shaft 11 is restored.
Conventional pump cleaning methods often require shut down and disassembly of the associated components, by which cleaning can be accomplished by simply activating the motor 14 and performing a simple operation, greatly improving the convenience of operation. By the turbulence generated by the dial block 32, the inside of the pump, particularly the inner wall of the guide housing, can be effectively flushed to remove the attached impurities or residues. Since frequent disassembly of the device is not required, wear and damage to the device is reduced. Since frequent disassembly of the device is not required, wear and damage to the device is reduced.
The exemplary embodiments of the present application may be combined with each other, and exemplary embodiments obtained by combining also fall within the scope of the present application.
The principles and embodiments of the present application have been described with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (9)
1. The multistage centrifugal pump with the self-cleaning function is characterized by comprising a pump body assembly (1) and a cleaning assembly (3);
the pump body assembly (1) comprises a pump shaft (11), at least two centrifugal impellers (12), a diversion shell (13) and a motor (14), wherein the centrifugal impellers (12) are arranged on the pump shaft (11), the pump shaft (11) is rotatably arranged in the diversion shell (13), and the motor (14) is connected with the rotating shaft (11) and is used for driving the rotating shaft (11) to rotate;
the cleaning assembly (3) is arranged between two adjacent centrifugal impellers (12);
the cleaning assembly (3) comprises an energizing coil (31) and at least two dials (32); the inside of pump shaft (11) is hollow structure, just be provided with on pump shaft (11) relatively holding cavity (33) of shifting block (32), power on coil (31) set up in the inside of pump shaft (11), and be located two between shifting block (32), two the opposite one end of shifting block (32) is provided with magnetic pole (35) of mutual attraction.
2. The multistage centrifugal pump with self-cleaning function according to claim 1, further comprising a cooling housing (2), wherein a motor sealing housing (21) is provided inside the cooling housing (2), the motor sealing housing (21) is sleeved outside the motor (14), and seals the motor (14) inside the motor sealing housing (21), a medium flow space is formed between the cooling housing (2) and the motor sealing housing (21), and an output pipeline (22) is provided at one end of the cooling housing (2) away from the diversion housing (13).
3. Multistage centrifugal pump with self-cleaning function according to claim 2, characterized in that the cooling housing (2) is lined with a conduit (23), which conduit (23) passes through the cooling housing (2) and the motor seal housing (21).
4. The multistage centrifugal pump with the self-cleaning function according to claim 1, wherein a mounting shaft (34) is fixedly connected between the two accommodating cavities (33), and the energizing coil (31) is sleeved on the mounting shaft (34).
5. Multistage centrifugal pump with self-cleaning function according to claim 1, characterized in that the inner wall of the housing cavity (33) is provided with a chute (36), and the magnetic pole (35) is provided with a sliding seat (37) matching with the chute (36).
6. Multistage centrifugal pump with self-cleaning function according to claim 1, characterized in that it further comprises a power supply assembly (4), said power supply assembly (4) being adapted to supply said energizing coil (31).
7. Multistage centrifugal pump with self-cleaning function according to claim 1, characterized in that the power supply assembly (4) comprises a bearing (41), a permanent magnet (42), a power generation coil (43), a rectifier (44) and a battery (45); the bearing (41) is fixedly connected with the inner wall of the pump shaft (11), the permanent magnet (42) is connected with the bearing (41) through a rotating shaft (421), and the permanent magnet (42) is in rotary connection with the pump shaft (11) through the bearing (41); the power generation coil (43) bypasses the permanent magnet (42) and is connected with the rectifier (44), the rectifier (44) is fixedly connected with the inner wall of the pump shaft (11), the rectifier (44) is connected with the storage battery (45), and the storage battery (45) is used for supplying power to the power supply coil (31).
8. Multistage centrifugal pump with self-cleaning function according to claim 1, characterized in that the inside of the guiding casing (13) adopts a spatial guiding structure.
9. A method for using a multistage centrifugal pump with self-cleaning function, characterized in that it is used for implementing a multistage centrifugal pump with self-cleaning function according to any one of claims 1 to 8, comprising the following steps:
s1: when cleaning is needed, the lower end of the diversion shell (13) is communicated with a cleaning medium;
s2: starting the motor (14) to enable the pump shaft (11) and the centrifugal impeller (12) connected with the pump shaft to start rotating;
s3: energizing the energizing coil (31) to generate a magnetic field;
s4: the two shifting blocks (32) extend out of the inside of the accommodating cavity (33) by utilizing the repulsive force between the magnetic field generated by the energizing coil (31) and the magnetic poles (35) of the shifting blocks (32);
s5: due to the rotation of the shifting block (32) and the interference of the shifting block on the cleaning medium, the cleaning medium generates turbulent flow in the diversion shell (13), so that the inner wall of the diversion shell (13) is washed and cleaned;
s6: after the cleaning is finished, the power-on coil (31) is stopped, and the two shifting blocks (32) automatically return to the accommodating cavity (33) due to the mutual attraction action of the magnetic poles (35), so that the smooth shaft body shape of the pump shaft (11) is restored.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311401545.9A CN117231514B (en) | 2023-10-26 | 2023-10-26 | Multistage centrifugal pump with self-cleaning function and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311401545.9A CN117231514B (en) | 2023-10-26 | 2023-10-26 | Multistage centrifugal pump with self-cleaning function and use method thereof |
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| CN117231514B CN117231514B (en) | 2024-04-16 |
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| CN117231514B (en) | 2024-04-16 |
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