CN108194375A - A kind of engineering machinery for preventing cavitation erosion and power loss - Google Patents
A kind of engineering machinery for preventing cavitation erosion and power loss Download PDFInfo
- Publication number
- CN108194375A CN108194375A CN201810001282.5A CN201810001282A CN108194375A CN 108194375 A CN108194375 A CN 108194375A CN 201810001282 A CN201810001282 A CN 201810001282A CN 108194375 A CN108194375 A CN 108194375A
- Authority
- CN
- China
- Prior art keywords
- motor
- electric machine
- power loss
- cavitation erosion
- machine support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003628 erosive effect Effects 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005119 centrifugation Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 24
- 239000012530 fluid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
-
- 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
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of engineering machinery for preventing cavitation erosion and power loss,Including the first support plate,The upper surface of first support plate is equipped with the first electric machine support,The upper surface of first electric machine support is equipped with main motor,The lateral surface upper end of main motor is equipped with arc-shaped motor fixed plate,Arc-shaped motor fixed plate is threadedly coupled by fixing bolt with being arranged on the threaded hole of the first electric machine support upper surface,Originally the engineering machinery of cavitation erosion and power loss is prevented,It is simple in structure,It is easy to operate,It occupies little space during use,It is possible to prevente effectively from power loss caused by cavitation erosion and harm,The use that stand-by motor combines auxiliary impeller sets can induce the liquid in water inlet pipe in advance,So that liquid stream shifts to an earlier date work done under the action of impeller sets are assisted,So as to effectively increase the pressure of liquid stream,Liquid stream is avoided to cavitate in centrifugation cabin,Using for first end cover combination second end cover allows the present invention easily to be installed.
Description
Technical field
The present invention relates to technical field of engineering machinery, specially a kind of engineering machinery for preventing cavitation erosion and power loss.
Background technology
When centrifugal pump operates, fluid pressure declines, the liquid near blade inlet along pump intake to impeller eye
Pressure reaches minimum, and hereafter since impeller is to liquid work done, fluid pressure rises quickly.It is minimum when impeller blade entrance
When pressure is less than the saturated vapour pressure under liquid delivery temperature, liquid just vaporizes.Meanwhile make the gas being dissolved in originally in liquid
Body also escapes, they form bubble.When bubble flows to Ye Daonei pressure higher positions with liquid, the fluid pressure of outside is higher than gas
Pressure for vaporization in bubble, then bubble condenses again crumbles and fall to form hole, and the liquid of moment inner periphery is with high speed to sky
Cave is brought, and liquid is caused to hit mutually, and local pressure is made to increase suddenly.In this way, liquid proper flow is not only hindered, particularly sternly
Weight, if these bubbles are crumbled and fall in impeller near wall, liquid is just as countless small bullets, and continuously strike is golden
Metal surface.Its collision frequency is very high, then metal surface breakaway due to impact fatigue.If it is mingled with certain active gases in bubble
(such as oxygen), the heat released when they are condensed by bubble (local temperature is up to 200~300 DEG C), can also form thermoelectricity
It is even, electrolysis is generated, electrochemical corrosion effect is formed, more accelerates the breakdown speed that metal degrades.As the vaporization of this liquid, coagulate
Knot, forms high pressure, high temperature, high-frequency percussion load at impact, cause the mechanical breakaway of metal material and electrochemical corrosion destroy it is comprehensive
Close the cavitation that phenomenon is known as centrifugal pump.When cavitation erosion occurs, due to mechanical denuding and the collective effect of chemical attack, cause material
Material is destroyed, and there is also noise and vibration.When cavitation erosion development is serious, the presence of a large amount of bubbles can block the section of runner,
The energy that fluid is obtained from impeller is reduced, liquid in pump is caused to interrupt, it is impossible to work normally.
Invention content
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of work for preventing cavitation erosion and power loss
Journey machinery, it is possible to prevente effectively from power loss caused by cavitation erosion, facility is brought, and can effectively reduce to user's use
The noise and vibration that centrifugal pump generates in use, while can play a very good protection again to the housing of centrifugal pump,
The problems in background technology can effectively be solved.
To achieve the above object, the present invention provides following technical solution：A kind of engineering machine for preventing cavitation erosion and power loss
Tool, including the first support plate, the upper surface of first support plate is equipped with the first electric machine support, the upper surface of the first electric machine support
Equipped with main motor, the lateral surface upper end of main motor is equipped with arc-shaped motor fixed plate, arc-shaped motor fixed plate by fixing bolt with
The threaded hole for being arranged on the first electric machine support upper surface is threadedly coupled, and the right side of main motor is equipped with centrifugation cabin, the output of main motor
Axis socket-connects with being arranged on the first sealing bearing of centrifugation cabin medial surface left end, and the right side of the output shaft of main motor, which is equipped with, to be turned
Disk, the right side of turntable are equipped with water pump vane, and the inside left face of the left side and centrifugation cabin of the turntable abuts mutually setting,
It centrifuges and outlet pipe is equipped on the left of the lateral surface upper end in cabin, centrifuge and water inlet pipe is equipped on the right side of the lateral surface lower end in cabin, centrifuge the right side in cabin
Side is equipped with stand-by motor, and the output shaft of stand-by motor socket-connects with being arranged on the bearing of centrifugation cabin medial surface right end, stand-by motor
The left side of output shaft be equipped with auxiliary impeller sets, the lateral surface front and rear sides of stand-by motor set that there are two front and rear symmetrically arranged
Installing plate, installing plate are connected with the second electric machine support by fixing bolt, and the lower surface of the second electric machine support is equipped with the second support
The input terminal of plate, the main motor and stand-by motor is electrically connected by peripheral control unit with the output terminal of external power supply.
As a preferred technical solution of the present invention, the upper surface of first electric machine support is close to main motor lateral surface
One end be equipped with arc rubber sheet gasket.
As a preferred technical solution of the present invention, the quantity of the water pump vane is no less than eight, and no less than eight
A water pump vane is evenly distributed on the right side of turntable.
As a preferred technical solution of the present invention, the front end face of the outlet pipe is equipped with first end cover, water inlet pipe
Lower face is equipped with second end cover.
As a preferred technical solution of the present invention, the leading flank of the first end cover and second end cover is equipped with installation
Hole.
Compared with prior art, the beneficial effects of the invention are as follows：Originally the engineering machinery of cavitation erosion and power loss, structure are prevented
Simply, easy to operate, when use, occupies little space, it is possible to prevente effectively from power loss caused by cavitation erosion and harm, stand-by motor
The liquid in water inlet pipe can be induced in advance with reference to the use of auxiliary impeller sets so that liquid stream is in the effect of auxiliary impeller sets
Shift to an earlier date work done down, so as to effectively increase the pressure of liquid stream, avoid liquid stream and cavitate in centrifugation cabin, first end cover combines
Using for second end cover allows the present invention easily to be installed.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is front view of the present invention；
Fig. 3 is vertical view of the present invention；
Fig. 4 is partial structural diagram of the present invention.
In figure：1 first electric machine support, 2 first support plates, 3 second support plates, 4 first end covers, 5 second electric machine supports, 6
Stand-by motor, 7 outlet pipes, 8 centrifugation cabins, 9 arc-shaped motor fixed plates, 10 main motors, 11 first sealing bearings, 12 water pump vanes,
13 auxiliary impeller sets, 14 second sealing bearings, 15 second end covers, 16 installing plates, 17 water inlet pipes, 18 turntables.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
- 4 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of engineering machinery for preventing cavitation erosion and power loss,
Including the first support plate 2, the upper surface of the first support plate 2 is equipped with the first electric machine support 1, and the upper surface of the first electric machine support 1 is set
There is main motor 10, the upper surface of the first electric machine support 1 is equipped with arc rubber sheet gasket, main electricity close to one end of 10 lateral surface of main motor
The lateral surface upper end of machine 10 is equipped with arc-shaped motor fixed plate 9, and arc-shaped motor fixed plate 9 is by fixing bolt and is arranged on the first electricity
The threaded hole of 1 upper surface of machine support is threadedly coupled, and the right side of main motor 10 is equipped with centrifugation cabin 8, and the output shaft of main motor 10 is with setting
The the first sealing bearing 11 put in centrifugation 8 medial surface left end of cabin socket-connects, and the right side of the output shaft of main motor 10 is equipped with turntable
18, the right side of turntable 18 is equipped with water pump vane 12, and the quantity of water pump vane 12 is no less than eight, and the water pump of no less than eight
Impeller 12 is evenly distributed on the right side of turntable 18, and the left side of turntable 18 is set with mutual abut in the inside left face for centrifuging cabin 8
It puts, centrifuges and outlet pipe 7 is equipped on the left of the lateral surface upper end in cabin 8, the front end face of outlet pipe 7 is equipped with first end cover 4, centrifugation cabin 8
Water inlet pipe 17 is equipped on the right side of lateral surface lower end, the lower face of water inlet pipe 17 is equipped with second end cover 15, first end cover 4 and second end cover
15 leading flank is equipped with mounting hole, and first end cover 4 allows the present invention easily to carry out with reference to using for second end cover 15
Installation, the right side in centrifugation cabin 8 are equipped with stand-by motor 6, and the output shaft of stand-by motor 6 is with being arranged on centrifugation 8 medial surface right end of cabin
Bearing socket-connects, and the left side of the output shaft of stand-by motor 6 is equipped with auxiliary impeller sets 13, and stand-by motor 6 combines auxiliary impeller sets
13 use can induce the liquid in water inlet pipe 17 in advance so that liquid stream is made in advance under the action of impeller sets 13 are assisted
Work(so as to effectively increase the pressure of liquid stream, avoids liquid stream and cavitates in centrifugation cabin 8, before the lateral surface of stand-by motor 6
Both sides are set there are two front and rear symmetrically arranged installing plate 16 afterwards, and installing plate 16 is connected with the second electric machine support 5 by fixing bolt,
The lower surface of second electric machine support 5 is equipped with the second support plate 3, and the input terminal of main motor 10 and stand-by motor 6 passes through external control
Device processed is electrically connected with the output terminal of external power supply, originally prevents the engineering machinery of cavitation erosion and power loss, simple in structure, operation side
Just, it occupies little space during use, it is possible to prevente effectively from power loss caused by cavitation erosion and harm.
When in use：Water inlet pipe 17 by outer conduit with external cistern is connected, connects external power supply, stand-by motor
6 drive auxiliary impeller sets 13 to rotate, while main motor 10 drives water pump vane 12 to rotate by its output shaft by its output shaft,
The water in external cistern is pumped in centrifugation cabin 8 by water pump vane 12, when flow is by auxiliary impeller sets 13, by assisting
Impeller sets 13 first accelerate flow so that and flow shifts to an earlier date work done in impeller sets 13 are assisted, to improve water flow pressure, warp
Acceleration of the flow after the acceleration of impeller sets 13 again through water pump vane 12 is assisted to be flowed out from 7 high speed of outlet pipe, effectively prevents water
Stream cavitates, while in turn ensure and possess enough power when flow is flowed out from outlet pipe 7 in cabin 8 is centrifuged.
The present invention can be installed easily, and occupied space is few during use, is easily installed and uses；It can store effectively
Power loss caused by avoiding cavitation erosion is damaged with instrument, improves ease of use；The setting of turntable 8 effectively ensure that water pump leaf
12 stability in high speed rotation is taken turns, improves ease of use.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of engineering machinery for preventing cavitation erosion and power loss, including the first support plate (2), it is characterised in that：Described first
The upper surface of support plate (2) is equipped with the first electric machine support (1), and the upper surface of the first electric machine support (1) is equipped with main motor (10), main
The lateral surface upper end of motor (10) is equipped with arc-shaped motor fixed plate (9), and arc-shaped motor fixed plate (9) passes through fixing bolt and setting
Threaded hole in the first electric machine support (1) upper surface is threadedly coupled, and the right side of main motor (10) is equipped with centrifugation cabin (8), main motor
(10) output shaft socket-connects with being arranged on the first sealing bearing (11) of centrifugation cabin (8) medial surface left end, main motor (10)
The right side of output shaft is equipped with turntable (18), and the right side of turntable (18) is equipped with water pump vane (12), a left side for the turntable (18)
End face and the inside left face of centrifugation cabin (8) are equipped with mutually outlet pipe on the left of setting, the lateral surface upper end of centrifugation cabin (8)
(7), water inlet pipe (17) is equipped on the right side of the lateral surface lower end of centrifugation cabin (8), the right side of centrifugation cabin (8) is equipped with stand-by motor (6), auxiliary
The output shaft of motor (6) is helped to socket-connect with being arranged on the bearing of centrifugation cabin (8) medial surface right end, the output shaft of stand-by motor (6)
Left side be equipped with auxiliary impeller sets (13), the lateral surface front and rear sides of stand-by motor (6) set that there are two front and rear symmetrically arranged
Installing plate (16), installing plate (16) are connected with the second electric machine support (5), the following table of the second electric machine support (5) by fixing bolt
Face is equipped with the second support plate (3), and the input terminal of the main motor (10) and stand-by motor (6) passes through peripheral control unit and outside
The output terminal electrical connection of power supply.
2. a kind of engineering machinery for preventing cavitation erosion and power loss according to claim 1, it is characterised in that：Described first
The upper surface of electric machine support (1) is equipped with arc rubber sheet gasket close to one end of main motor (10) lateral surface.
3. a kind of engineering machinery for preventing cavitation erosion and power loss according to claim 1, it is characterised in that：The water pump
The quantity of impeller (12) is no less than eight, and the water pump vane (12) of no less than eight is evenly distributed on the right end of turntable (18)
Face.
4. a kind of engineering machinery for preventing cavitation erosion and power loss according to claim 1, it is characterised in that：The water outlet
The front end face for managing (7) is equipped with first end cover (4), and the lower face of water inlet pipe (17) is equipped with second end cover (15).
5. a kind of engineering machinery for preventing cavitation erosion and power loss according to claim 4, it is characterised in that：Described first
End cap (4) and the leading flank of second end cover (15) are equipped with mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001282.5A CN108194375A (en) | 2018-01-02 | 2018-01-02 | A kind of engineering machinery for preventing cavitation erosion and power loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001282.5A CN108194375A (en) | 2018-01-02 | 2018-01-02 | A kind of engineering machinery for preventing cavitation erosion and power loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194375A true CN108194375A (en) | 2018-06-22 |
Family
ID=62587999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810001282.5A Pending CN108194375A (en) | 2018-01-02 | 2018-01-02 | A kind of engineering machinery for preventing cavitation erosion and power loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194375A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323080A (en) * | 2021-04-15 | 2021-08-31 | 朱福栋 | Efficient mechatronic water supply installation |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059768A (en) * | 1964-04-16 | 1967-02-22 | Ernst Goran Vejde | Centrifugal pump |
| JPS52124201A (en) * | 1976-04-09 | 1977-10-19 | Baltimore Aircoil Co Inc | Duplex turboopump driving arrangements |
| DD136759A1 (en) * | 1978-05-29 | 1979-07-25 | Hans Spengler | HIGH PRESSURE PUMPS UNIT |
| DE4005923C2 (en) * | 1990-02-24 | 1994-08-18 | Klein Schanzlin & Becker Ag | Centrifugal pump with impellers of different speeds |
| CN1313473A (en) * | 2000-03-15 | 2001-09-19 | 中国科学院金属研究所 | Integral pump |
| CN1120303C (en) * | 2001-03-16 | 2003-09-03 | 王德军 | Double-driving dirotatory axial flow pump |
| CN106837821A (en) * | 2017-04-11 | 2017-06-13 | 浙江新控泵业有限公司 | Low noise binary self-priming combination pump |
| CN107091237A (en) * | 2017-07-03 | 2017-08-25 | 江苏液泉泵阀制造有限公司 | A kind of novel horizontal centrifugal pump |
-
2018
- 2018-01-02 CN CN201810001282.5A patent/CN108194375A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059768A (en) * | 1964-04-16 | 1967-02-22 | Ernst Goran Vejde | Centrifugal pump |
| JPS52124201A (en) * | 1976-04-09 | 1977-10-19 | Baltimore Aircoil Co Inc | Duplex turboopump driving arrangements |
| DD136759A1 (en) * | 1978-05-29 | 1979-07-25 | Hans Spengler | HIGH PRESSURE PUMPS UNIT |
| DE4005923C2 (en) * | 1990-02-24 | 1994-08-18 | Klein Schanzlin & Becker Ag | Centrifugal pump with impellers of different speeds |
| CN1313473A (en) * | 2000-03-15 | 2001-09-19 | 中国科学院金属研究所 | Integral pump |
| CN1120303C (en) * | 2001-03-16 | 2003-09-03 | 王德军 | Double-driving dirotatory axial flow pump |
| CN106837821A (en) * | 2017-04-11 | 2017-06-13 | 浙江新控泵业有限公司 | Low noise binary self-priming combination pump |
| CN107091237A (en) * | 2017-07-03 | 2017-08-25 | 江苏液泉泵阀制造有限公司 | A kind of novel horizontal centrifugal pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323080A (en) * | 2021-04-15 | 2021-08-31 | 朱福栋 | Efficient mechatronic water supply installation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108194375A (en) | A kind of engineering machinery for preventing cavitation erosion and power loss | |
| CN202326279U (en) | Water pump with adjustable base | |
| CN205823740U (en) | Make the inhalation mask that the intake performance of pump is improved and the pump possessing this cover | |
| JP2011256769A (en) | Horizontal shaft pump equipment and operating method for the same | |
| CN221373940U (en) | Circulating fluid axial flow pump with cavitation-resistant structure | |
| CN206785650U (en) | A kind of centrifugal pump with decrease of noise functions | |
| CN206129620U (en) | Quick self -priming centrifugal pump of combined type | |
| CN208416979U (en) | A kind of turbo-driven submerged sewage pump | |
| CN112879354A (en) | Reciprocating circulation centrifugal water pump | |
| US3431860A (en) | Centrifugal pump of the free surface type | |
| CN209212571U (en) | A kind of high-temperature-hot-water centrifugal pump | |
| CN111124087A (en) | A CPU water cooling power unit | |
| CN104074769A (en) | Water pumping system of centrifugal pump | |
| CN206830467U (en) | Base type hollow rotor directly drives electronic water pump | |
| CN208669615U (en) | A kind of intelligent cold-hot water self priming vortex pump | |
| CN206338213U (en) | A kind of New type water pump | |
| KR101997575B1 (en) | Double Suction Self Priming Pump | |
| CN207960968U (en) | Anti- trapped gas water pump | |
| CN208416981U (en) | Vertical submerged pump with automatic liquid-drainage function | |
| CN107503950A (en) | A kind of energy-conservation water fetching device for agricultural irrigation | |
| JPH07217600A (en) | Pumping installation | |
| CN216691480U (en) | Energy-saving WQD sewage pump | |
| KR200413909Y1 (en) | Hot water circulation pump with hot water and air discharge pipe | |
| JP6568961B2 (en) | Submersible pump device | |
| CN204646694U (en) | A kind of variable power water pump for sewage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190203 Address after: 272100 Shandong Polytechnic Vocational College, No. 6 Lotus Road, Taibaihu District, Jining City, Shandong Province Applicant after: SHANDONG CAREER DEVELOPMENT COLLEGE Address before: 272100 Shandong Polytechnic Vocational College, No. 6 Lotus Road, Taibaihu District, Jining City, Shandong Province Applicant before: Niu Jing |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180622 |
|
| RJ01 | Rejection of invention patent application after publication |