CN106122042A - A kind of many suction nozzles proof submersible sand discharging pump - Google Patents
A kind of many suction nozzles proof submersible sand discharging pump Download PDFInfo
- Publication number
- CN106122042A CN106122042A CN201610676283.0A CN201610676283A CN106122042A CN 106122042 A CN106122042 A CN 106122042A CN 201610676283 A CN201610676283 A CN 201610676283A CN 106122042 A CN106122042 A CN 106122042A
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- Prior art keywords
- pump
- cover
- grinding plate
- suction
- side grinding
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- 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.)
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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
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- 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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of many suction nozzles proof submersible sand discharging pump, including the submersible motor (1) assembled the most successively, grease chamber (4), pump cover (5), the pump housing (8) and suction cover (14), wear to the pump housing under the axle of described submersible motor, pump cover, the pump housing and suction cover constitute pump chamber, the axle of described submersible motor is positioned at pump chamber position and is provided with outlet pipe equipped with impeller (7), the side of the pump housing；It is characterized in that: described pump cover is tubulose, upper orifice, lower nozzle are adpting flange, pipe shaft has at least three lateral aperture and is connected to horizontal tube, and the horizontal tube mouth of pipe is side flange external side suction tube.The present invention has that simple in construction, blowdown area are big, inlet capacity strong, have chopping, agitating function, and has pump and need not hard-wired advantage；Having after pump uses a period of time, in the case of gap increases, not taking pump apart can be adjusted gap, thus improves the service life of pump simultaneously.
Description
Technical field
The present invention relates to a kind of immersible pump, especially relate to a kind of proof submersible sand discharging pump with multiple flooded suction.
Background technology
At present, all only one of which of the proof submersible sand discharging pump on market are located at the suction inlet below the pump housing.The blowdown of such pump
Limited area, needs constantly the position of mobile pump to realize the expansion of blowdown area, and the movement of pump each time, it is required for installing
Fixing, waste time and energy.When there are long stapled material in sewage, pump is usually stuck；When sewage has precipitate, pump
Also have no idea to pump.After pump uses a period of time, gap between impeller and the pump housing, pump cover increases, cause pump flow,
Lift reduces, and at this moment needs to take apart pump to change impeller, and the service life of such pump is short, and operating cost is high.
Summary of the invention
The technical problem to be solved, it is simply that provide a kind of many suction nozzles proof submersible sand discharging pump, it has: 1, blowdown face
Long-pending big, inlet capacity is strong, be not required to the advantage that installation is fixing；2, dismounting can be not required to and just the gap of pump can be adjusted, extend pump
Service life；3, moreover it is possible to sewage medium-length fibre material is carried out chopping conveying, and the precipitate in sewage can be stirred
Blending transportation.
Solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of many suction nozzles proof submersible sand discharging pump, including the submersible motor 1 assembled the most successively, grease chamber 4, pump cover 5, the pump housing
8 and suction cover 14, to wear under the axle of described submersible motor to the pump housing 8, pump cover 5, the pump housing 8 and suction cover 14 constitute pump chamber, described latent
The axle of hydroelectric machine is positioned at pump chamber position and is provided with outlet pipe equipped with impeller 7, the side of the pump housing 8；It is characterized in that: described pump cover 5
For tubulose, upper orifice, lower nozzle are adpting flange, pipe shaft has at least three lateral aperture and is connected to horizontal tube, the horizontal tube mouth of pipe
For side flange external side suction tube.
Described side suction tube is the pipe that level is curved under backward before this, and the lower end tube wall of pipe has side inlet hole.
On the basis of above-mentioned basic model, the present invention also has following various modified model:
Described impeller is laterally zygomorphic unshrouded impeller, is provided with height-adjustable upside below the pump cover 5 of described pump chamber
Nog plate 16, suction cover 14 be arranged over height-adjustable lower side grinding plate 15, the gradient of described upper side grinding plate lower surface and leaf
The gradient of wheel upper surface is consistent, and the gradient of described lower side grinding plate upper surface is consistent with the gradient of impeller lower surface.
The described height-adjustable structure of upper side grinding plate 16 is: the end face of upper side grinding plate 16 is evenly equipped with at least three screw thread
Hole, pump cover has through hole corresponding to described upper side grinding plate 16 screwed hole position and is installed with regulation bolt 17, regulation bolt 17
Structure is: hypomere is that the thread segment of side grinding plate 16 screwed hole is gone up in cooperation, centre is bulge loop, epimere is the thread segment being furnished with nut,
Upper head is square toes.
The described height-adjustable structure of lower side grinding plate 15 is: the bottom surface of lower side grinding plate 15 is evenly equipped with at least three screw thread
Hole, suction cover has through hole corresponding to described lower side grinding plate 15 screwed hole position and is installed with regulation bolt 17, regulate bolt 17
Structure be: hypomere be coordinate upper side grinding plate 16 screwed hole thread segment, middle be the screw thread being furnished with nut for bulge loop, epimere
Section, upper head is square toes.
The lower end of described suction cover has annular groove set equipped with horn-like main suction tube, the lower surface of described suction cover 14
The fixing blade stretched in having, the lower end of the axle of described submersible motor is equipped with puddler, corresponding to fixing blade on puddler
Lower position is equipped with rotating knife, and the lower end of puddler is equipped with stirring wheel.
The lower end of the axle of described submersible motor is threaded equipped with the attachment structure of puddler.
The structure of described rotating knife is: a wheel hub, is provided with two blades radially symmetrically, and wheel hub is also evenly equipped with at least three
Clamp screw pit radially.
Described grease chamber 4 is provided with oil water probe 2.
Beneficial effect: fixing blade and rotating knife constitute the shredding mechanism of pump, can be to the long fibre thing in cesspool
Matter is shredded；Puddler and stirring wheel constitute the agitating device of pump, can be stirred the precipitate in cesspool；Pump
Lid, upper side grinding plate, regulation bolt constitute the upper lash adjusting device of pump, upper between side grinding plate and impeller when pump operation a period of time
After gap increases, its gap can be adjusted；Same, lower side grinding plate, suction cover, regulation bolt constitute the lower gap of pump and adjust dress
Put.
The lower end of impeller, lower side grinding plate, suction cover, main suction tube constitute the main suction duct of pump；The upper end of impeller, on
Side grinding plate, pump cover and three or three side suction passages forming pump with upside suction tube, owing to impeller is upper and lower open-type, have
Handling capacity is big, so expands the blowdown area of proof submersible sand discharging pump, improves the pollution discharge capability of pump, three or three simultaneously
Above side suction tube serves the effect supporting pump, so eliminates the fixed installation of pump.
Accompanying drawing explanation
Fig. 1 is many suction nozzles submersible sewage pump configuration cross-sectional schematic of the present invention；
Fig. 2 is the sectional view of pump cover 5 in Fig. 1；
Fig. 3 is the K direction view of Fig. 2；
Fig. 4 is the sectional view of impeller 7 in Fig. 1；
Fig. 5 is the sectional view of upper side grinding plate 16 in Fig. 1；
Fig. 6 is the P direction view of Fig. 5；
Fig. 7 is the structural representation regulating bolt 17 in Fig. 1；
Fig. 8 is the M direction view of Fig. 7；
Fig. 9 is the structural representation of rotating knife 12 in Fig. 1；
Figure 10 is the N direction view of Fig. 9；
Figure 11 is the structural representation of puddler 11 in Fig. 1.
In figure:
1-submersible motor 2-oil water probe 3-mechanical seal 4-grease chamber 5-pump cover 6-side suction tube 7-leaf
Wheel 8-pump housing 9-main suction tube 10-stirring wheel 11-puddler 12-rotating knife 13-fixes blade 14-and sucks
Under lid 15-, on side grinding plate 16, side grinding plate 17-regulates bolt 18 axle 19 horizontal tube 20 pump cover endoporus 21 side
Side grinding plate lower surface 25 screwed hole 26 step 27 on impeller lower surface, flange 22 impeller upper surface 23 24
Screw thread 28 6 side 29 wheel hub 30 32 times screwed holes of blade 31 upper screwed hole
Detailed description of the invention
See Fig. 1 to Figure 11, many suction nozzles proof submersible sand discharging pump embodiment of the present invention, latent including assemble the most successively
Hydroelectric machine 1, grease chamber 4, pump cover 5, the pump housing 8 and suction cover 14, wear under the axle of submersible motor 1 to the pump housing 8, pump cover 5, the pump housing 8 and suction
Enter lid 14 composition pump chamber.
The axle of submersible motor is positioned at pump chamber position equipped with impeller 7, and the side of the pump housing 8 is provided with outlet pipe, and pump cover 5 is pipe
Shape, upper orifice, lower nozzle are adpting flange, and pipe shaft has at least three lateral aperture connection endoporus 20, and lateral aperture is circumscribed with water
Flat pipe 19, the horizontal tube mouth of pipe is side flange external side suction tube, for the present embodiment, side suction tube be before this level backward under
Curved pipe, the lower end tube wall of pipe has side inlet hole.
The lower end of suction cover 14 is equipped with horn-like main suction tube, and the lower surface of suction cover 14 has in annular groove is provided with stretches
Fixing blade 13, the lower end of the axle of submersible motor is equipped with puddler 11, corresponding to the lower section of fixing blade on puddler 11
Position is equipped with rotating knife 12, and the lower end of puddler is equipped with stirring wheel 10.
The lower end of the axle of submersible motor is threaded equipped with the attachment structure of puddler, and the structure of rotating knife is: one takes turns
Hub 29, is provided with two blades 30 radially symmetrically, and wheel hub is also evenly equipped with at least three clamp screw pit radially.
Impeller 7 is laterally zygomorphic unshrouded impeller, be provided with below the pump cover 5 of pump chamber height-adjustable upper side grinding plate 16,
Suction cover 14 be arranged over height-adjustable lower side grinding plate 15, the gradient of upper side grinding plate lower surface is oblique with impeller upper surface
Degree is consistent, and the gradient of lower side grinding plate upper surface is consistent with the gradient of impeller lower surface.
The upper height-adjustable structure of side grinding plate 16 is: the end face of upper side grinding plate 16 is evenly equipped with at least three screwed hole, pump
Cover corresponding to upper side grinding plate 16 screwed hole position have through hole be installed with regulation bolt 17, regulation bolt 17 structure be: under
Thread segment, centre that section is upper side grinding plate 16 screwed hole of cooperation are bulge loop, epimere is the thread segment being furnished with nut, and upper head is
Square toes.
The lower height-adjustable structure of side grinding plate 15 is: the bottom surface of lower side grinding plate 15 is evenly equipped with at least three screwed hole, inhales
Enter to cover corresponding to lower side grinding plate 15 screwed hole position have through hole be installed with regulation bolt 17, regulation bolt 17 structure be:
Hypomere is that the thread segment of side grinding plate 16 screwed hole is gone up in cooperation, centre is bulge loop, epimere is the thread segment being furnished with nut, upper head
For square toes.
Submersible motor 1 is coupled by flange and seam with grease chamber 4, in grease chamber 4 built with oil water probe 2, on axle 18 equipped with
Mechanical seal 3, the lower end of grease chamber 4 couples with pump cover 5, and pump cover 5 is built with mechanical seal 3, at three screw threads of upper side grinding plate 16
Hole each screws in regulation bolt 17, is contained in the lower end of pump cover 5 the most together, loads impeller 7, in pump cover 5 and upside on axle 18
The lower end of nog plate 16 loads the pump housing 8, and at different levels screw-in of three screwed holes at lower side grinding plate 15 regulates bolt 17 and suction cover 14
Connect, be contained in the lower end of the pump housing 8 the most together, in the groove of the lower surface of suction cover 14, load fixing blade 13, by puddler
11 lower ends screwing in axles 18, are inserted in rotating knife 12 screw fastened on puddler 11, loading stirring wheel 10, suction cover 14 times
End loads main suction tube 9, finally loads three side suction tubes 6 on the side flange 21 of pump cover 5.
Impeller 7, is a laterally zygomorphic unshrouded impeller, its impeller upper surface 22 and the gradient one of impeller lower surface 23
Cause.
Pump cover 5, its outer circular direction is designed with three circular holes and is connected to horizontal tube 19, and the mouth of pipe of horizontal tube is side flange
21, horizontal tube 19 leads to endoporus 20.
The bottom of impeller 7, lower side grinding plate 15, suction cover 14 and main suction tube 9 constitute main suction duct；Impeller 7
Upper end, upper side grinding plate 16, pump cover 5, three horizontal tubes 19, side suction tubes 6 form side suction passage, owing to impeller 7 is upper and lower
Open type, there is handling capacity big, so expand the blowdown area of pump, improve the pollution discharge capability of pump, simultaneously three or
The side suction tube 6 of more than three serves the effect supporting pump, so eliminates the fixed installation of pump.
Upper side grinding plate 16, the gradient of its upper side grinding plate lower surface 24 is consistent, on it with the gradient of the upper surface 22 of impeller
End face is provided with three screwed holes 25.
Regulation bolt 17, its Front-end Design becomes six sides 28, and followed by screw thread, middle part is provided with step 26, and rear end is provided with spiral shell
Stricture of vagina 27.
Pump cover 5, upper side grinding plate 16, regulation bolt 17 constitute the upper lash adjusting device of pump, when pump operation a period of time,
After upper side grinding plate increases with impeller clearance, its gap can be adjusted, so adjust in the case of not taking pump apart, simple and convenient,
Significantly extend the service life of pump.
Concrete operation method: unscrew the nut on regulation bolt 17, clamps six sides 28 with spanner and rotates regulation bolt 17, i.e.
Its gap of scalable, then fastening nut.
Lower side grinding plate 15, suction cover 14, regulation bolt 17 constitute the lower lash adjusting device of pump.
Fixing blade 13 and rotating knife 12 constitute the shredding mechanism of pump, and rotating knife is to be welded in wheel hub 29 by smatterer's sheet 30
On form, be contained on puddler, adjust the gap of fixing blade and rotating knife, thus can be to the long fibre in cesspool
Material shreds.
Puddler 11 and stirring wheel 10 constitute the agitating device of pump, and stirring wheel 10 is contained in the lower end of puddler 11, stirring
The upper end of bar 11 is provided with upper screwed hole 31, screws in the lower end of axle 18, and the lower end of puddler 11 is provided with lower screwed hole 32, this device
Precipitate in cesspool can be stirred.
Claims (10)
1. a suction nozzle proof submersible sand discharging pump more than, including the submersible motor (1) assembled the most successively, grease chamber (4), pump cover (5),
The pump housing (8) and suction cover (14), wear under the axle (18) of described submersible motor to the pump housing, and pump cover, the pump housing and suction cover constitute pump chamber,
The axle of described submersible motor is positioned at pump chamber position and is provided with outlet pipe equipped with impeller (7), the side of the pump housing；It is characterized in that: described
Pump cover (5) be tubulose, upper orifice, lower nozzle are adpting flange, pipe shaft has at least three lateral aperture and is connected to horizontal tube, water
The flat pipe mouth of pipe is side flange (21) external side suction tube (6).
Many suction nozzles proof submersible sand discharging pump the most according to claim 1, is characterized in that: described side suction tube (6) is water before this
Pipe curved under putting down backward, the lower end tube wall of pipe has side inlet hole.
Many suction nozzles proof submersible sand discharging pump the most according to claim 1 and 2, is characterized in that: described impeller (7) is laterally zygomorphic
Unshrouded impeller, pump cover (5) lower section of described pump chamber is provided with height-adjustable upper side grinding plate (16), the top of suction cover (14) sets
Having height-adjustable lower side grinding plate (15), the gradient of described upper side grinding plate lower surface is consistent with the gradient of impeller upper surface, institute
The gradient stating lower side grinding plate upper surface is consistent with the gradient of impeller lower surface.
Many suction nozzles proof submersible sand discharging pump the most according to claim 3, is characterized in that: described upper side grinding plate (16) adjustable-height
Structure be: the end face of upper side grinding plate is evenly equipped with at least three screwed hole, corresponding to described upper side grinding plate screwed hole position on pump cover
The place of putting has through hole and is installed with regulation bolt (17), and the structure of regulation bolt is: hypomere is the screw thread coordinating upper side grinding plate screwed hole
Section, centre are bulge loop, epimere is the thread segment being furnished with nut, and upper head is square toes；Described lower side grinding plate (15) scalable is high
The structure of degree is: the bottom surface of lower side grinding plate is evenly equipped with at least three screwed hole, corresponding to described lower side grinding plate screw thread on suction cover
Hole location has through hole and is installed with regulation bolt (17), and the structure of regulation bolt is: hypomere is to coordinate upper side grinding plate screwed hole
Thread segment, centre are bulge loop, epimere is the thread segment being furnished with nut, and upper head is square toes.
Many suction nozzles proof submersible sand discharging pump the most according to claim 3, is characterized in that: the lower end of described suction cover (14) is equipped with loudspeaker
The main suction tube of shape, the lower surface of described suction cover has in annular groove is provided with the fixing blade stretched, described submersible motor
The lower end of axle is equipped with puddler, corresponding to fixing the lower position of blade equipped with rotating knife, the lower end of puddler on puddler
Equipped with stirring wheel.
Many suction nozzles proof submersible sand discharging pump the most according to claim 6, is characterized in that: the lower end of the axle of described submersible motor equipped with
The attachment structure of puddler is threaded.
Many suction nozzles proof submersible sand discharging pump the most according to claim 6, is characterized in that: the structure of described rotating knife is: a wheel hub
(29), it is provided with two blades (30) radially symmetrically, wheel hub is also evenly equipped with at least three clamp screw pit radially.
Many suction nozzles proof submersible sand discharging pump the most according to claim 4, is characterized in that: the lower end of described suction cover (14) is equipped with loudspeaker
The main suction tube of shape, the lower surface of described suction cover has in annular groove is provided with the fixing blade stretched, described submersible motor
The lower end of axle is equipped with puddler, corresponding to fixing the lower position of blade equipped with rotating knife, the lower end of puddler on puddler
Equipped with stirring wheel.
Many suction nozzles proof submersible sand discharging pump the most according to claim 8, is characterized in that: many suction nozzles according to claim 6
Proof submersible sand discharging pump, is characterized in that: the lower end of the axle of described submersible motor is threaded equipped with the attachment structure of puddler.
Many suction nozzles proof submersible sand discharging pump the most according to claim 9, is characterized in that: the structure of described rotating knife is: a wheel hub
(29), it is provided with two blades (30) radially symmetrically, wheel hub is also evenly equipped with at least three clamp screw pit radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610676283.0A CN106122042A (en) | 2016-08-16 | 2016-08-16 | A kind of many suction nozzles proof submersible sand discharging pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610676283.0A CN106122042A (en) | 2016-08-16 | 2016-08-16 | A kind of many suction nozzles proof submersible sand discharging pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106122042A true CN106122042A (en) | 2016-11-16 |
Family
ID=57278555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610676283.0A Pending CN106122042A (en) | 2016-08-16 | 2016-08-16 | A kind of many suction nozzles proof submersible sand discharging pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106122042A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237761A (en) * | 2017-08-11 | 2017-10-10 | 上海上涵自动化科技有限公司 | Anti-clogging sewage pump |
| CN107559238A (en) * | 2017-08-07 | 2018-01-09 | 江苏大学 | A kind of import guiding device for improving canned motor pump cavitation performance |
| CN111350656A (en) * | 2018-12-24 | 2020-06-30 | 华中科技大学 | Submarine sewage pump with high reliable sealing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202520564U (en) * | 2012-03-12 | 2012-11-07 | 江苏新跃泵业制造有限公司 | Abrasion-resistant and corrosion-resistant chemical centrifugal pump |
| CN202768424U (en) * | 2012-09-25 | 2013-03-06 | 上海水泵集团有限公司 | Submersible sewage pump |
| CN202833184U (en) * | 2012-09-25 | 2013-03-27 | 邵阳市三良泵业有限公司 | Under liquid surface sewage pump |
| CN204082575U (en) * | 2014-09-10 | 2015-01-07 | 上海汇业机械科技有限公司 | diving cutting dredge pump |
| CN206206195U (en) * | 2016-08-16 | 2017-05-31 | 广州市白云泵业集团有限公司 | A kind of many suction nozzle proof submersible sand discharging pumps |
-
2016
- 2016-08-16 CN CN201610676283.0A patent/CN106122042A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202520564U (en) * | 2012-03-12 | 2012-11-07 | 江苏新跃泵业制造有限公司 | Abrasion-resistant and corrosion-resistant chemical centrifugal pump |
| CN202768424U (en) * | 2012-09-25 | 2013-03-06 | 上海水泵集团有限公司 | Submersible sewage pump |
| CN202833184U (en) * | 2012-09-25 | 2013-03-27 | 邵阳市三良泵业有限公司 | Under liquid surface sewage pump |
| CN204082575U (en) * | 2014-09-10 | 2015-01-07 | 上海汇业机械科技有限公司 | diving cutting dredge pump |
| CN206206195U (en) * | 2016-08-16 | 2017-05-31 | 广州市白云泵业集团有限公司 | A kind of many suction nozzle proof submersible sand discharging pumps |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559238A (en) * | 2017-08-07 | 2018-01-09 | 江苏大学 | A kind of import guiding device for improving canned motor pump cavitation performance |
| CN107559238B (en) * | 2017-08-07 | 2019-08-27 | 江苏大学 | A kind of import guiding device improving canned motor pump cavitation performance |
| CN107237761A (en) * | 2017-08-11 | 2017-10-10 | 上海上涵自动化科技有限公司 | Anti-clogging sewage pump |
| CN111350656A (en) * | 2018-12-24 | 2020-06-30 | 华中科技大学 | Submarine sewage pump with high reliable sealing |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161116 |
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| RJ01 | Rejection of invention patent application after publication |