CN120083721A - A multi-stage centrifugal pump with intelligent cleaning and reverse flushing - Google Patents
A multi-stage centrifugal pump with intelligent cleaning and reverse flushing Download PDFInfo
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- CN120083721A CN120083721A CN202510586302.XA CN202510586302A CN120083721A CN 120083721 A CN120083721 A CN 120083721A CN 202510586302 A CN202510586302 A CN 202510586302A CN 120083721 A CN120083721 A CN 120083721A
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- switching
- centrifugal pump
- gear
- shaft
- branch pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明涉及离心泵领域，具体公开了一种智能清洁反向冲洗的多级离心泵，包括多级离心泵主体、设置于多级离心泵主体一端侧面的进水口以及设置于多级离心泵主体一端顶部的出水口；所述进水口的侧面连通设置有呈中空状的切换壳，且切换壳的内腔为圆柱形，所述切换壳的内侧设置有过滤切换组件，所述过滤切换组件包括转动设置于切换壳内侧中部的切换轴，所述切换轴的侧壁设置有一对相对设置的过滤板。该智能清洁反向冲洗的多级离心泵，通过设置的切换壳、过滤切换组件、第一密封板、水压传感器以及管道组件的相互配合，可以在实现过滤阻杂的同时实现堵塞监测与自动化清洗，无需停机，提高了效率。
The present invention relates to the field of centrifugal pumps, and specifically discloses a multi-stage centrifugal pump with intelligent cleaning and reverse flushing, comprising a multi-stage centrifugal pump body, a water inlet arranged on the side of one end of the multi-stage centrifugal pump body, and a water outlet arranged on the top of one end of the multi-stage centrifugal pump body; the side of the water inlet is connected to a hollow switching shell, and the inner cavity of the switching shell is cylindrical, and a filter switching assembly is arranged on the inner side of the switching shell, and the filter switching assembly includes a switching shaft rotatably arranged in the middle of the inner side of the switching shell, and a pair of filter plates arranged oppositely are arranged on the side wall of the switching shaft. The multi-stage centrifugal pump with intelligent cleaning and reverse flushing can realize blockage monitoring and automatic cleaning while filtering and blocking impurities through the mutual cooperation of the switching shell, the filter switching assembly, the first sealing plate, the water pressure sensor and the pipeline assembly, without stopping the machine, thereby improving efficiency.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to an intelligent cleaning and back flushing multistage centrifugal pump.
Background
The multistage centrifugal pump is high-efficiency fluid conveying equipment for realizing gradual pressurization of liquid by serially connecting a plurality of impellers, has the core advantages of obviously improving the limited lift of a single-stage impeller through multistage superposition, being widely applied to high-lift requirement scenes such as deep well water lifting, high-pressure boiler water supply, long-distance pipeline conveying and the like, and being used for preventing the abrasion of the impellers or the blockage of a flow passage caused by the entry of impurities into a pump cavity, the prior art is generally provided with a filtering structure such as a filter screen, a filter basket or a cyclone separator at the water inlet of the pump, and filtering out foreign matters such as solid particles, fibers and the like in a physical interception mode, thereby protecting the normal operation of precise components in the pump.
However, the filtering structure of the existing multistage centrifugal pump has certain defects that when a filtering component is gradually blocked due to long-term interception of impurities, the pressure loss of the system is increased, the flow is reduced, and a filter element is required to be removed, cleaned or replaced by stopping the machine, so that the process not only depends on manual operation and takes longer time, so that the production flow is interrupted, the operation and maintenance cost is increased, but also the installation error is easily caused by frequent disassembly and assembly, and the leakage risk is further increased;
The traditional filtering structure lacks real-time blockage monitoring and automatic cleaning functions, cannot early warn or perform online treatment during blockage, and severely restricts the continuous operation efficiency and the intelligent level of the pump system.
Therefore, it is necessary to provide an intelligent cleaning and back-flushing multistage centrifugal pump to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an intelligent cleaning and back flushing multistage centrifugal pump, and solves the problems that a filtering structure in the prior art is inconvenient to clean and cannot be used for monitoring blockage in real time in the background art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the intelligent cleaning back flushing multistage centrifugal pump comprises a multistage centrifugal pump main body, a water inlet arranged on one end side surface of the multistage centrifugal pump main body and a water outlet arranged on the top of one end of the multistage centrifugal pump main body;
The side surface of the water inlet is communicated with a switching shell, the inner cavity of the switching shell is cylindrical, the inner side of the switching shell is provided with a filtering switching assembly, the filtering switching assembly comprises a switching shaft which is rotatably arranged in the middle of the inner side of the switching shell, the side wall of the switching shaft is provided with a pair of oppositely arranged filter plates, and the bottom of the switching shell is provided with a driving source for driving the switching shaft to rotate;
the side wall of the switching shaft is provided with a pair of first sealing plates which are oppositely arranged, the filter plates and the first sealing plates are in a cross shape, and when one of the filter plates corresponds to the water inlet, the first sealing plate corresponds to the edge of the water inlet;
a water pressure sensor is arranged at one end of the water inlet close to the multistage centrifugal pump main body;
The utility model discloses a multistage centrifugal pump is provided with the switching shell, be provided with the pipeline subassembly on the switching shell, the pipeline subassembly is including setting up in the first branch pipe of delivery port one side, and the one end that the delivery port was kept away from to first branch pipe corresponds and the intercommunication with the one end that the switching shell is close to water pressure sensor, the one end of first branch pipe is provided with the control valve, and one side intercommunication of first branch pipe is provided with the second branch pipe, the one end that the second branch pipe kept away from first branch pipe corresponds and communicates with one side that the switching shell was carried forward to multistage centrifugal pump main part, and the intercommunication position is just to the filter that sets up dorsad, one side of switching shell is provided with the blow off pipe that sets up relatively with the second branch pipe.
Preferably, the second branch pipe is close to the one end inboard rotation of switching the shell and is provided with the pivot, be fixed with the sealing ball that is used for carrying out shutoff to the second branch pipe in the pivot, one side of sealing ball is run through and is provided with the through-hole.
Preferably, the driving source is used for driving the switching shaft and the rotating shaft to rotate alternately, the driving source comprises a transmission box arranged at the bottom of the switching shell, the lower end of the rotating shaft extends to the inner side of the transmission box and is provided with a first gear, the lower end of the switching shaft extends to the inner side of the transmission box and is provided with a second gear, the inner side of the transmission box rotates and is provided with an incomplete gear which is positioned between the first gear and the second gear and is used for being meshed with the first gear and the second gear alternately, the bottom of the transmission box is provided with a motor used for driving the incomplete gear to rotate, and when the incomplete gear is meshed with the second gear and the first gear once, the first gear and the second gear can rotate for one hundred eighty degrees.
Preferably, the two sides of the upper end of the first sealing plate are symmetrically provided with plugging pieces for plugging the bottom of the first branch pipe, and the plugging pieces are separated from the first branch pipe when the first sealing plate is in a plugging state for the water inlet.
Preferably, the inside locking subassembly that is provided with of switch shell, the locking subassembly is including setting up in the first locking dish of first gear bottom, the bottom of second gear is provided with the second locking dish, one side of second locking dish and first locking dish all is provided with curved locking groove, the bottom of incomplete gear is provided with sectorial locking arc, and the locking arc is used for pegging graft the cooperation with the locking groove.
Preferably, the switching shaft is of a hollow structure, an inner shaft is rotatably arranged in the middle of the inner side of the switching shaft, a torsion spring is arranged between the end part of the inner shaft and the inner wall of the switching shaft, and a connecting plate which extends to the inner side of the switching shaft and is fixedly connected with the side wall of the inner shaft is arranged at one end of the filter plate, which is close to the switching shaft.
Preferably, the lateral wall of switching shaft is provided with the opening, the one end that the filter is close to the switching shaft is provided with arc and with switching shaft outer wall sliding fit's second closing plate, and the second closing plate is used for shutoff to the opening, the connecting plate is fixed in the lateral wall of second closing plate, and the one end of connecting plate passes the opening and extends to the switching shaft inboard.
Preferably, a sealing rubber ring is arranged at the edge of the first sealing plate.
Preferably, the inner side of the first sealing plate is provided with a piston cavity, the inner side of the periphery of the first sealing plate is provided with an expansion cavity communicated with a sealing rubber ring and the piston cavity, the inner sides of the expansion cavity and the piston cavity are filled with fluid, one end of the inner side of the piston cavity, which is far away from the expansion cavity, is movably connected with a piston rod, one end of the piston rod extends to the inner side of the switching shaft and corresponds to the side wall of the inner shaft, the side wall of the inner shaft is provided with an arc-shaped pressurizing block, one end of the sealing rubber ring is in sliding fit with the pressurizing block, and one end of the pressurizing block is provided with an elastic slope.
Preferably, the fluid is hydraulic oil.
Compared with the prior art, the invention has the beneficial effects that:
1. This clean back flushing's of intelligence multistage centrifugal pump through the switching shell that sets up, filtration switching assembly, first closing plate, water pressure sensor and pipeline assembly's mutually supporting, can realize blocking up monitoring and automatic washing when realizing that the filtration hinders miscellaneous, and the back flush self-cleaning of filter can be realized as back flush water source to the liquid of transiently, a small amount of utilization delivery port exhaust, need not to shut down, has improved efficiency.
2. The intelligent cleaning and back flushing multistage centrifugal pump has the advantages that the filter plate can be buffered and protected through the inner shaft, the torsion spring and the connecting plate, the damage of the filter plate caused by instant pressure or overlarge pressure is avoided, the pressing block, the slope, the piston rod, the piston cavity, the expansion cavity and the fluid are mutually matched, the rotation of the inner shaft can be driven by the pressing of the filter plate to realize the expansion of the sealing rubber ring, so that the higher the water pressure is, the higher the tightness between the first sealing plate and the inner wall of the switching shell is, the possibility of leakage is avoided, the structure is compact, and the practicability is improved.
Drawings
The disclosure of the present invention is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 schematically shows a schematic structure of the present invention;
FIG. 2 schematically shows a schematic view of the structure of the invention from the bottom perspective;
FIG. 3 is a schematic diagram showing the overall structure of the water inlet, the switching shell and the first branch pipe;
FIG. 4 is a schematic view showing the structure of the first branch pipe, the transmission case, the switching case and the second branch pipe in the disassembled state;
FIG. 5 schematically illustrates a schematic view of the structure of the invention from another perspective based on FIG. 4;
fig. 6 schematically shows a schematic structural view of the inside of the switch housing of the present invention;
FIG. 7 is a schematic view showing the overall structure of the filter plate and the first sealing plate of the present invention;
FIG. 8 schematically illustrates a construction of the present invention in a disassembled state based on FIG. 7;
FIG. 9 schematically illustrates a schematic top view of the interior of the shift axle of the present invention;
FIG. 10 is a schematic cross-sectional view schematically showing a first sealing plate of the present invention;
FIG. 11 is a schematic view showing the structure of the sealing ball of the present invention in a disassembled state from the second branch pipe;
Fig. 12 schematically shows a schematic structure of the driving source of the present invention in a disassembled state.
The reference numerals in the figure are 1, a multi-stage centrifugal pump main body, 2, a water outlet, 3, a water inlet, 4, a switching shell, 5, a first branch pipe, 6, a second branch pipe, 7, a blow-off pipe, 8, a transmission case, 9, a control valve, 10, a rotating shaft, 11, a water pressure sensor, 12, a switching shaft, 13, a filter plate, 14, a first sealing plate, 15, a sealing sheet, 16, a sealing rubber ring, 17, an opening, 18, an inner shaft, 19, a torsion spring, 20, a pressurizing block, 21, a second sealing plate, 22, a connecting plate, 23, a piston rod, 24, a slope surface, 25, a piston cavity, 26, an expansion cavity, 27, a sealing ball, 28, a first gear, 29, a second gear, 30, an incomplete gear, 31, a first locking disc, 32, a locking arc, 33, a second locking disc, 34, a locking groove, 35, a through hole, 36 and a motor.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
An embodiment in accordance with the present invention is shown in connection with fig. 1-12.
As shown in fig. 1-7 and 11, the intelligent cleaning and back flushing multistage centrifugal pump comprises a multistage centrifugal pump main body 1, a water inlet 3 arranged on one end side surface of the multistage centrifugal pump main body 1, and a water outlet 2 arranged on the top of one end of the multistage centrifugal pump main body 1, wherein a hollow switching shell 4 is arranged on the side surface of the water inlet 3 in a communicated manner, the inner cavity of the switching shell 4 is cylindrical, a switching shaft 12 is rotatably arranged in the middle of the inner side of the switching shell 4, a pair of filter plates 13 which are oppositely arranged are arranged on the side wall of the switching shaft 12, a driving source for driving the switching shaft 12 to rotate is arranged at the bottom of the switching shell 4, a pair of first sealing plates 14 which are oppositely arranged are arranged on the side wall of the switching shaft 12 in order to realize the partition sealing of the inner cavity of the switching shell 4, the edges of the first sealing plates 14 are in a cross shape, sealing rubber rings 16 are arranged on the edges of the first sealing plates 14, the sealing rubber ring 16 is attached to the inner wall of the switching shell 4, when one of the filter plates 13 corresponds to the water inlet 3, the first sealing plate 14 corresponds to the edge of the water inlet 3, one end of the water inlet 3, which is close to the multistage centrifugal pump main body 1, is provided with the water pressure sensor 11, the water pressure sensor 11 is positioned on one side of the switching shell 4, which is close to the multistage centrifugal pump main body 1, the probe of the water pressure sensor 11 extends to the inner cavity of the water inlet 3, one side of the water outlet 2 is provided with the first branch pipe 5, one end of the first branch pipe 5, which is far away from the water outlet 2, corresponds to and is communicated with one end of the switching shell 4, which is close to the water pressure sensor 11, one end of the first branch pipe 5 is provided with the control valve 9, one side of the first branch pipe 5 is communicated with the second branch pipe 6, one end of the second branch pipe 6, which is far away from the first branch pipe 5, corresponds to and is communicated with one side of the switching shell 4, which is far away from the multistage centrifugal pump main body 1, the filter plate 13 is arranged opposite to the water inlet 3 at the communicating part, a drain pipe 7 which is arranged opposite to the second branch pipe 6 is arranged at one side of the switching shell 4, a valve is also arranged on the drain pipe 7, a rotating shaft 10 is rotatably arranged at the inner side of one end of the second branch pipe 6 close to the switching shell 4 for sealing the second branch pipe 6, a sealing ball 27 for sealing the second branch pipe 6 is fixed on the rotating shaft 10, a through hole 35 is arranged on one side of the sealing ball 27 in a penetrating way, sealing sheets 15 for sealing the bottom of the first branch pipe 5 are symmetrically arranged at two sides of the upper end of the first sealing plate 14, and the sealing sheets 15 are separated from the first branch pipe 5 when the first sealing plate 14 is in a sealing state for the water inlet 3;
Further, as shown in fig. 12, the driving source is used for driving the switching shaft 12 and the rotating shaft 10 to rotate alternately, as a preferred embodiment, the driving source comprises a transmission case 8 arranged at the bottom of the switching housing 4, the lower end of the rotating shaft 10 extends to the inner side of the transmission case 8 and is provided with a first gear 28, the lower end of the switching shaft 12 extends to the inner side of the transmission case 8 and is provided with a second gear 29, the inner side of the transmission case 8 rotates and is provided with an incomplete gear 30 which is arranged between the first gear 28 and the second gear 29 and is used for being meshed with the first gear 28 and the second gear 29 alternately, the bottom of the transmission case 8 is provided with a motor 36 used for driving the incomplete gear 30 to rotate, and when the incomplete gear 30 is meshed with the second gear 29 and the first gear 28 once, the first gear 28 and the second gear 29 can rotate by one hundred eighty degrees.
As shown in fig. 5 and 12, in order to realize the locking of the control valve 9 and the switching shaft 12 when not engaged, a first locking disk 31 is provided at the bottom of the first gear 28, a second locking disk 33 is provided at the bottom of the second gear 29, arc-shaped locking grooves 34 are provided at both sides of the second locking disk 33 and the first locking disk 31, a fan-shaped locking arc 32 is provided at the bottom of the incomplete gear 30, and the locking arc 32 is used for being in plug-fit with the locking grooves 34, and is configured such that when the incomplete gear 30 is separated from the second gear 29, the locking arc 32 enters the locking grooves 34 on the second locking disk 33, and when the incomplete gear 30 is separated from the first gear 28, the locking arc 32 enters the locking grooves 34 on the first locking disk 31.
As shown in fig. 8-9, in order to buffer and protect the filter plate 13, the switching shaft 12 is provided with a hollow structure, an inner shaft 18 is rotatably provided in the middle of the inner side of the switching shaft 12, a torsion spring 19 is provided between the end of the inner shaft 18 and the inner wall of the switching shaft 12, one end of the filter plate 13 near the switching shaft 12 is provided with a connecting plate 22 extending to the inner side of the switching shaft 12 and fixedly connected with the side wall of the inner shaft 18, specifically, the side wall of the switching shaft 12 is provided with an opening 17, one end of the filter plate 13 near the switching shaft 12 is provided with a second sealing plate 21 in arc shape and in sliding fit with the outer wall of the switching shaft 12, the second sealing plate 21 is used for sealing the opening 17, the connecting plate 22 is fixed on the side wall of the second sealing plate 21, and one end of the connecting plate 22 extends to the inner side of the switching shaft 12 through the opening 17.
Further, as shown in fig. 9-10, in order to increase the tightness between the first sealing plate 14 and the inner wall of the switching shell 4, a piston cavity 25 is provided on the inner side of the first sealing plate 14, an expansion cavity 26 communicated with the sealing rubber ring 16 and the piston cavity 25 is provided on the inner side of the outer periphery of the first sealing plate 14, fluid, preferably hydraulic oil, or other liquid with small influence of temperature can be replaced in the expansion cavity 26 and the inner side of the piston cavity 25, one end of the piston cavity 25 far away from the expansion cavity 26 is movably connected with a piston rod 23, one end of the piston rod 23 extends to the inner side of the switching shaft 12 and corresponds to the side wall of the inner shaft 18, an arc-shaped pressing block 20 is provided on the side wall of the inner shaft 18, one end of the sealing rubber ring 16 is in sliding fit with the pressing block 20, one end of the pressing block 20 is provided with a slope 24, and the slope 24 is in smooth transition with the outer wall of the pressing block 20.
When the multistage centrifugal pump is used, multistage impellers in the multistage centrifugal pump main body 1 rotate, liquid enters through the water inlet 3, high-pressure liquid is discharged from the water outlet 2 under the centrifugal force of the impellers, one filter plate 13 is correspondingly used for impurity filtration with the water inlet 3 during the period, the other filter plate 13 is to be used in a conversion mode at the other end of the inner side of the switching shell 4, the first sealing plate 14 is just positioned at the side edge of the water inlet 3, sealing is achieved, the hydraulic pressure sensor 11 monitors the hydraulic pressure during the period, the situation that the filter plate 13 is blocked is judged, when the liquid flows through the water inlet 3 and the switching shell 4, the hydraulic pressure can push the filter plate 13, the filter plate 13 drives the inner shaft 18 to rotate through the connecting plate 22, torsion springs 19 are twisted and generate reverse acting force, buffer protection can be carried out on the filter plate 13, one end of the piston rod 23 is always abutted against the side wall of the pressing block 20, when the hydraulic pressure is overlarge, the filter plate 13 drives the inner shaft 18 to rotate, the slope 24 is correspondingly used with the piston rod 23, the slope 24 is pressed towards the piston rod 23, the piston rod 23 is pressed towards the direction of the expansion cavity 26, the hydraulic oil is outwards supported by the hydraulic oil, the sealing rubber 16 has a tendency to expand, the sealing effect, and the sealing effect is more tightly attached to the inner wall of the switching shell 4 is avoided;
When the filter plate 13 is blocked to a certain extent to influence the water yield of the water outlet 2, the water pressure value monitored by the water pressure sensor 11 exceeds a preset value, at this time, the motor 36 and the control valve 9 are started, the liquid part discharged from the water outlet 2 enters the first branch pipe 5, the sealing ball 27 is in a blocking state to the second branch pipe 6 initially, the blocking piece 15 is in a blocking state to the first branch pipe 5, two ends of the locking arc 32 are respectively corresponding to the two locking grooves 34, the control valve 9 and the switching shaft 12 are in a locked state, at this time, the rotating shaft 10 and the switching shaft 12 cannot rotate, the motor 36 drives the incomplete gear 30 to rotate due to the starting of the motor 36, one end of the locking arc 32 is separated from the locking groove 34 on the second locking disk 33, the switching shaft 12 is unlocked, then the incomplete gear 30 is meshed with the second gear 29, the second gear 29 drives the switching shaft 12 to gradually rotate by one hundred eighty degrees, the switching shaft 12 drives the filter plate 13 and the first sealing plate 14 to rotate, the switching shaft 12 rotates anticlockwise, impurities on the upstream of the filter plate 13 are prevented from being flushed into the multistage centrifugal pump main body 1, when the first sealing plate 14 rotates to cause blocking of the water inlet 3, the blocking piece 15 on one first sealing plate 14 is separated from the lower end of the first branch pipe 5, at the moment, liquid in the first branch pipe 5 enters the water inlet 3 and then enters the multistage centrifugal pump main body 1, self circulation is realized for a short time, dry rotation and cavitation of an impeller in the multistage centrifugal pump main body 1 when the first sealing plate 14 blocks the water inlet 3, mechanical damage is reduced, the water inlet 3 is gradually opened by the first sealing plate 14 to restore pumping work when the first sealing plate 14 rotates to one hundred eighty degrees, the blocking piece 15 on the other first sealing plate 14 is displaced to the lower end of the first branch pipe 5 to block the water inlet 3, when normal suction operation is carried out, at this time, when the switching shaft 12 rotates for one hundred eighty degrees, the incomplete gear 30 is separated from the second gear 29, the locking arc 32 enters the locking groove 34 on the second locking disc 33, then one end of the locking arc 32 is separated from the locking groove 34 on the first locking disc 31, the incomplete gear 30 starts to be meshed with the first gear 28, and then the first gear 28 drives the sealing ball 27 to rotate ninety degrees through the control valve 9, at this time, the motor 36 stops for a period of time, because the bottom of the first branch pipe 5 is blocked, liquid entering the first branch pipe 5 enters the second branch pipe 6, then enters the switching shell 4 through the through hole 35 to back flush the filter plate 13, waste water is discharged and collected through the drain pipe 7, during back flushing, the water inlet 3 and the other end on the inner side of the switching shell 4 normally circulate liquid, after back flushing for a period of time, the motor 36 runs again, the incomplete gear 30 continues to drive the first gear 28 to rotate, so that the sealing ball 27 continues to rotate ninety degrees, the through hole 35 is staggered with the second branch pipe 6, the sealing ball 27 again closes the control valve 9 and the motor 36, and the drain pipe 7 can be prevented from leaking due to the arrangement of the valve 7;
It should be noted that, due to the existence of the sealing rubber ring 16, the sealing piece 15 cannot completely seal the bottom of the first branch pipe 5, even if the sealing piece 15 leaks when being located at the bottom of the first branch pipe 5, the leaked liquid enters the multistage centrifugal pump main body 1 along with the liquid entering from the water inlet 3, so that the use is not affected, and the sealing piece 15 mainly aims at ensuring that most of the liquid in the first branch pipe 5 can enter the second branch pipe 6 during the back flushing stage, so as to ensure enough water pressure to realize back flushing.
The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.
Claims (10)
1. The intelligent cleaning back flushing multistage centrifugal pump is characterized by comprising a multistage centrifugal pump main body, a water inlet arranged on one end side surface of the multistage centrifugal pump main body and a water outlet arranged at the top of one end of the multistage centrifugal pump main body;
The side surface of the water inlet is communicated with a switching shell, the inner cavity of the switching shell is cylindrical, the inner side of the switching shell is provided with a filtering switching assembly, the filtering switching assembly comprises a switching shaft which is rotatably arranged in the middle of the inner side of the switching shell, the side wall of the switching shaft is provided with a pair of oppositely arranged filter plates, and the bottom of the switching shell is provided with a driving source for driving the switching shaft to rotate;
the side wall of the switching shaft is provided with a pair of first sealing plates which are oppositely arranged, the filter plates and the first sealing plates are in a cross shape, and when one of the filter plates corresponds to the water inlet, the first sealing plate corresponds to the edge of the water inlet;
a water pressure sensor is arranged at one end of the water inlet close to the multistage centrifugal pump main body;
The utility model discloses a multistage centrifugal pump is provided with the switching shell, be provided with the pipeline subassembly on the switching shell, the pipeline subassembly is including setting up in the first branch pipe of delivery port one side, and the one end that the delivery port was kept away from to first branch pipe corresponds and the intercommunication with the one end that the switching shell is close to water pressure sensor, the one end of first branch pipe is provided with the control valve, and one side intercommunication of first branch pipe is provided with the second branch pipe, the one end that the second branch pipe kept away from first branch pipe corresponds and communicates with one side that the switching shell was carried forward to multistage centrifugal pump main part, and the intercommunication position is just to the filter that sets up dorsad, one side of switching shell is provided with the blow off pipe that sets up relatively with the second branch pipe.
2. The intelligent cleaning and back flushing multistage centrifugal pump of claim 1, wherein a rotating shaft is rotatably arranged on the inner side of one end of the second branch pipe close to the switching shell, a sealing ball for sealing the second branch pipe is fixed on the rotating shaft, and a through hole is formed in one side of the sealing ball in a penetrating manner.
3. The intelligent cleaning and back flushing multistage centrifugal pump according to claim 2, wherein the driving source is used for driving the switching shaft and the rotating shaft to rotate alternately, the driving source comprises a transmission box arranged at the bottom of the switching shell, the lower end of the rotating shaft extends to the inner side of the transmission box and is provided with a first gear, the lower end of the switching shaft extends to the inner side of the transmission box and is provided with a second gear, the inner side of the transmission box rotates and is provided with an incomplete gear which is arranged between the first gear and the second gear and is used for being meshed with the first gear and the second gear alternately, a motor used for driving the incomplete gear to rotate is arranged at the bottom of the transmission box, and when the incomplete gear, the second gear and the first gear are meshed once, the first gear and the second gear can rotate by one hundred eighty degrees.
4. The multistage centrifugal pump for intelligent cleaning and back flushing according to claim 3, wherein the two sides of the upper end of the first sealing plate are symmetrically provided with plugging pieces for plugging the bottom of the first branch pipe, and the plugging pieces are separated from the first branch pipe when the water inlet of the first sealing plate is plugged by the first sealing plate.
5. The intelligent cleaning and back-flushing multistage centrifugal pump of claim 3, wherein the inner side of the switching shell is provided with a locking assembly, the locking assembly comprises a first locking disc arranged at the bottom of the first gear, the bottom of the second gear is provided with a second locking disc, one side of each of the second locking disc and the first locking disc is provided with an arc-shaped locking groove, the bottom of the incomplete gear is provided with a fan-shaped locking arc, and the locking arc is used for being in plug-in fit with the locking groove.
6. The intelligent cleaning and back flushing multistage centrifugal pump of claim 1, wherein the switching shaft is of a hollow structure, an inner shaft is rotatably arranged in the middle of the inner side of the switching shaft, a torsion spring is arranged between the end part of the inner shaft and the inner wall of the switching shaft, and one end, close to the switching shaft, of the filter plate is provided with a connecting plate which extends to the inner side of the switching shaft and is fixedly connected with the side wall of the inner shaft.
7. The intelligent cleaning and back flushing multistage centrifugal pump according to claim 6, wherein an opening is formed in the side wall of the switching shaft, a second arc-shaped sealing plate which is in sliding fit with the outer wall of the switching shaft is arranged at one end of the filter plate, which is close to the switching shaft, the second sealing plate is used for sealing the opening, the connecting plate is fixed to the side wall of the second sealing plate, and one end of the connecting plate penetrates through the opening to extend to the inner side of the switching shaft.
8. The intelligent cleaning and back-flushing multistage centrifugal pump of claim 6, wherein the edge of the first sealing plate is provided with a sealing rubber ring.
9. The intelligent cleaning and backflushing multistage centrifugal pump according to claim 8, wherein a piston cavity is formed in the inner side of the first sealing plate, an expansion cavity communicated with a sealing rubber ring and the piston cavity is formed in the inner side of the periphery of the first sealing plate, fluid is filled in the expansion cavity and the inner side of the piston cavity, a piston rod is movably connected to one end, far away from the expansion cavity, of the inner side of the piston cavity, one end of the piston rod extends to the inner side of the switching shaft and corresponds to the side wall of the inner shaft, an arc-shaped pressurizing block is arranged on the side wall of the inner shaft, one end of the sealing rubber ring is in sliding fit with the pressurizing block, and an elastic slope is arranged at one end of the pressurizing block.
10. The intelligent cleaning and back-flushing multistage centrifugal pump according to claim 9, wherein the fluid is hydraulic oil.
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| CN202510586302.XA CN120083721B (en) | 2025-05-08 | 2025-05-08 | Multistage centrifugal pump of clean back flush of intelligence |
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| CN202510586302.XA CN120083721B (en) | 2025-05-08 | 2025-05-08 | Multistage centrifugal pump of clean back flush of intelligence |
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| CN120083721B CN120083721B (en) | 2025-12-26 |
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| CN120487692A (en) * | 2025-07-17 | 2025-08-15 | 三联泵业股份有限公司 | Self-cleaning wear-resistant multistage centrifugal pump based on mine drainage |
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| CN222457807U (en) * | 2024-05-21 | 2025-02-11 | 河南金大地化工有限责任公司 | Energy-saving turbine compressor for synthesizing ammonia |
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| CN120083721B (en) | 2025-12-26 |
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