CN112283118A - Sewage treatment circulating pump - Google Patents
Sewage treatment circulating pump Download PDFInfo
- Publication number
- CN112283118A CN112283118A CN202011158491.4A CN202011158491A CN112283118A CN 112283118 A CN112283118 A CN 112283118A CN 202011158491 A CN202011158491 A CN 202011158491A CN 112283118 A CN112283118 A CN 112283118A
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- CN
- China
- Prior art keywords
- circulating pump
- sewage treatment
- housing
- passive
- dredging
- 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.)
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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
- 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
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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
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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
- F04D29/66—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
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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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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention discloses a sewage treatment circulating pump, which comprises a main body, a circulating pump stabilizing base, a sewage treatment filter screen, a circulating pump driving mechanism, a circulating pump passive dredging mechanism, a passive dredging mechanism control terminal and a circulating pump stabilizing housing, wherein the top end of the sewage treatment circulating pump body is provided with the circulating pump driving mechanism, the outer side of the sewage treatment circulating pump body is provided with the circulating pump stabilizing housing, the bottom end of the circulating pump stabilizing housing is provided with the circulating pump stabilizing base, the side surface of the circulating pump stabilizing housing is provided with the sewage treatment filter screen, the inner side of the circulating pump stabilizing housing is provided with the passive dredging mechanism control terminal, and the side surface of the sewage treatment filter screen is provided with the circulating pump passive dredging mechanism. Meanwhile, passive dredging can be realized, and the use and maintenance cost of the equipment is greatly reduced to a certain extent.
Description
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a sewage treatment circulating pump.
Background
With the development of economy, the topics about water pollution are continuously raised, particularly the problem of groundwater pollution, surface water pollution is obvious, groundwater pollution is quite feared, 70% of 13 billion population in China drinks groundwater, more than 400 cities in more than 660 cities use groundwater as drinking water sources, 90% of municipal groundwater in the country is polluted by introduction, and the other group of data also shows that groundwater is seriously challenged, 9 provinces such as Beijing and Shanghai in 2011 evaluate 857 monitoring wells in the district that the water quality is I and II, the monitoring wells of IV and V are more than 2%, the monitoring wells of IV and V are more than 76.8%, nine provinces are in China, the best water quality belongs to Hainan province, mainly II, and the monitoring wells of Shanghai and Beijing are mostly III, Heilongjiang and Jiangsu are the highest water quality of IV, Jilin and Niaolin, Guangdong, Ningxia four provinces district generally only reaches the level of V type, the water pollution condition is constantly aggravated, make sewage treatment and regeneration industry receive unprecedented concern, the gross profit rate of district all over the next two years all keeps about 70%, some areas have exceeded 100% even, industry development potential is very big, water pollution mainly relates to the field and has building, agriculture, transportation, the energy, the petrochemical industry, environmental protection, city view, medical treatment, each field such as food and beverage, in order to avoid groundwater to continue to pollute, it is especially important that city sewage comes out prominent, traditional sewage treatment is through filtering and screening layer upon layer, rubbish and impurity that will not be degradable are screened out, can discharge the field with city sewage treatment and discharge into the river course again.
The traditional sewage circulating pump is small in power and easy to block, the actual efficiency of sewage treatment is influenced, the mode efficiency of transferring sewage to a sewage treatment plant in the daily sewage treatment process of a city through a natural flowing mode is too low, the increasing sewage discharge amount is difficult to meet, the reduction of the fault rate of the sewage treatment circulating pump is more important for increasing the sewage treatment efficiency, and therefore the problem of how to solve the problem is needed to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a sewage treatment circulating pump which is attractive and elegant in structure, convenient to install and place, capable of effectively avoiding the situation that a circulating pump is blocked, capable of realizing passive dredging and greatly reducing the use and maintenance cost of equipment to a certain extent.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a sewage treatment circulating pump main part includes sewage treatment circulating pump body, circulating pump stabilizing base, the sewage treatment filter screen, circulating pump actuating mechanism, the passive desilting mechanism of circulating pump, passive desilting mechanism control terminal, the housing is stabilized to the circulating pump, sewage treatment circulating pump body top is provided with circulating pump actuating mechanism, the sewage treatment circulating pump body outside is provided with the stable housing of circulating pump, the stable housing bottom of circulating pump is provided with circulating pump stabilizing base, the stable housing side of circulating pump is provided with the sewage treatment filter screen, the stable housing inboard of circulating pump is provided with passive desilting mechanism control terminal, sewage treatment filter screen medial surface is provided with the passive desilting mechanism of.
Preferably, the top end of the circulating pump stabilizing base is provided with a stabilizing base top plate, the inner side of the stabilizing base top plate is provided with a housing locking bolt, and the bottom end of the stabilizing base top plate is provided with a top plate adjusting stay bar.
Preferably, one end head of the sewage treatment filter screen is provided with a stable housing contact port, and the bolt circulating pump on the inner side surface of the stable housing contact port stabilizes the housing.
Preferably, the side surface of the sewage treatment filter screen is provided with a dredging mechanism guide rail, and the inner side of the dredging mechanism guide rail is connected with a circulating pump driven dredging mechanism.
Preferably, the sewage treatment filter screen is arranged in a strip-shaped barrel structure.
Preferably, the top end of the driving mechanism of the circulating pump is provided with a driving mechanism power connection port, the side surface of the power connection port of the driving mechanism is provided with a driving mechanism lifting ring, and the bottom end of the driving mechanism of the circulating pump is provided with an auxiliary fixing structure sleeve.
Preferably, the passive dredging mechanism of the circulating pump is arranged into a cross-shaped structure.
Preferably, the middle part of the passive dredging mechanism of the circulating pump is provided with a passive dredging driving mechanism, the side surface of the passive dredging mechanism of the circulating pump is provided with a dredging moving roller, and the side surface of the dredging moving roller is connected with a guide rail of the dredging mechanism.
Preferably, the bottom end of the control terminal of the passive dredging mechanism is provided with an air suction vibration induction probe rod, the top end of the control terminal of the passive dredging mechanism is provided with a control terminal wiring port, and the side face of the control terminal of the passive dredging mechanism is provided with a dredging mechanism wiring port.
As preferred, the stable housing top of circulating pump is provided with supplementary fixed sleeve recess, and the inboard bottom of the stable housing of circulating pump is provided with circulating pump shock pad, and circulating pump shock pad top is provided with circulating pump assembly, and circulating pump actuating mechanism is connected on circulating pump assembly top, and the stable housing side of circulating pump is provided with the sewage import, and the stable housing top of circulating pump is provided with the sewage export.
Compared with the prior art, the invention has the beneficial effects that:
(1) the stabilizing base of the circulating pump can indirectly raise the height of the water suction port, so that the circulating pump is prevented from being blocked due to the lower position of the water suction port, meanwhile, naturally settled particles are prevented from submerging the sewage treatment circulating pump, and the maintenance frequency is reduced.
(2) The sewage treatment filter screen can cooperate the passive desilting mechanism of circulating pump to realize the clearance to great impurity, avoids appearing the circulating pump and blocks up, influences the treatment effeciency of sewage reality.
(3) The circulating pump driving mechanism can reduce the time of soaking under water to a certain extent, reduce the maintenance frequency of the driving mechanism and increase the sewage treatment efficiency.
(4) The passive desilting mechanism of circulating pump can be through inhaling empty vibration response probe rod perception circulating pump and the condition of inhaling the vacuum appears, clear up the great rubbish of attaching to sewage treatment filter screen surface fast, can reduce maintenance frequency to a certain extent.
(5) The control terminal of the passive dredging mechanism can judge whether the equipment is blocked by garbage according to the air suction vibration sensing probe rod, and sends a working instruction to the passive dredging mechanism of the circulating pump to recover the normal work of the sewage treatment circulating pump.
(6) The stable housing of circulating pump can make overall structure place more steady, makes actuating mechanism be in higher position simultaneously, reduces driving motor's damage frequency, can improve the treatment effeciency of actual sewage to a certain extent.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a stable base structure of the circulation pump of the present invention;
FIG. 3 is a schematic view of a sewage treatment screen according to the present invention;
FIG. 4 is a schematic structural diagram of a driving mechanism of the circulation pump according to the present invention;
FIG. 5 is a schematic structural view of a passive dredging mechanism of the circulating pump of the present invention;
FIG. 6 is a schematic structural diagram of a control terminal of the passive dredging mechanism of the present invention;
fig. 7 is a schematic view of the stable housing structure of the circulation pump of the present invention.
In the figure: 1. a sewage treatment circulating pump body; 2. a circulating pump stabilizing base; 3. a sewage treatment filter screen; 4. a circulating pump driving mechanism; 5. a circulating pump driven dredging mechanism; 6. a passive dredging mechanism control terminal; 7. a circulating pump stabilizing housing; 8. stabilizing the base top plate; 9. a housing locking bolt; 10. a top plate adjusting stay bar; 11. stabilizing the housing contact port; 12. a dredging mechanism guide rail; 13. the driving mechanism is connected with an electric port; 14. a drive mechanism hoist ring; 15. an auxiliary fixed structure sleeve; 16. a passive dredging driving mechanism; 17. a movable roller for dredging; 18. a control terminal wiring port; 19. a dredging mechanism wiring port; 20. auxiliary fixing sleeve grooves; 21. a circulation pump shock-absorbing liner; 22. a circulating pump assembly; 23. a sewage inlet; 24. a sewage outlet; 25. the air suction vibration induction probe rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, the main part includes sewage treatment circulating pump body 1, circulating pump stable base 2, sewage treatment filter screen 3, circulating pump actuating mechanism 4, the passive desilting mechanism 5 of circulating pump, passive desilting mechanism control terminal 6, housing 7 is stabilized to the circulating pump, 1 top of sewage treatment circulating pump body is provided with circulating pump actuating mechanism 4, 1 outside of sewage treatment circulating pump body is provided with circulating pump stable housing 7, 7 bottoms of circulating pump stable housing are provided with circulating pump stable base 2, 7 sides are provided with sewage treatment filter screen 3 to the circulating pump stable housing, 7 inboards are provided with passive desilting mechanism control terminal 6 to the circulating pump stable housing, 3 medial surfaces of sewage treatment filter screen are provided with the passive desilting mechanism 5 of circulating pump.
As shown in fig. 2, a stabilizing base top plate 8 is arranged at the top end of the circulating pump stabilizing base 2, a housing locking bolt 9 is arranged on the inner side of the stabilizing base top plate 8, and a top plate adjusting support rod 10 is arranged at the bottom end of the stabilizing base top plate 8.
As shown in figure 3, one end head of the sewage treatment filter screen 3 is provided with a stable housing contact port 11, the sewage treatment filter screen 3 is arranged into a strip-shaped barrel-shaped structure, a bolt circulating pump stable housing 7 is arranged on the inner side surface of the stable housing contact port 11, a dredging mechanism guide rail 12 is arranged on the side surface of the sewage treatment filter screen 3, and the inner side of the dredging mechanism guide rail 12 is connected with the passive dredging mechanism 5 of the circulating pump.
As shown in fig. 4, a driving mechanism power connection port 13 is arranged at the top end of the circulating pump driving mechanism 4, a driving mechanism lifting ring 14 is arranged on the side surface of the driving mechanism power connection port 13, and an auxiliary fixing structure sleeve 15 is arranged at the bottom end of the circulating pump driving mechanism 4.
As shown in figure 5, the passive dredging mechanism 5 of the circulating pump is arranged to be in a cross structure, the passive dredging driving mechanism 16 is arranged in the middle of the passive dredging mechanism 5 of the circulating pump, the dredging moving roller 17 is arranged on the side surface of the passive dredging mechanism 5 of the circulating pump, and the side surface of the dredging moving roller 17 is connected with the guide rail 12 of the dredging mechanism.
As shown in fig. 6, the bottom end of the passive dredging mechanism control terminal 6 is provided with an air suction vibration induction probe 25, the top end of the passive dredging mechanism control terminal 6 is provided with a control terminal wiring port 18, and the side surface of the passive dredging mechanism control terminal 6 is provided with a dredging mechanism wiring port 19.
As shown in fig. 7, the top end of the circulating pump stabilizing housing 7 is provided with an auxiliary fixing sleeve groove 20, the bottom end of the inner side of the circulating pump stabilizing housing 7 is provided with a circulating pump damping liner 21, the top end of the circulating pump damping liner 21 is provided with a circulating pump assembly 22, the top end of the circulating pump assembly 22 is connected with a circulating pump driving mechanism 4, the side surface of the circulating pump stabilizing housing 7 is provided with a sewage inlet 23, and the top end of the circulating pump stabilizing housing 7 is provided.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a sewage treatment circulating pump which characterized in that: the main body comprises a sewage treatment circulating pump body (1), a circulating pump stabilizing base (2), a sewage treatment filter screen (3), a circulating pump driving mechanism (4), a circulating pump passive dredging mechanism (5), a passive dredging mechanism control terminal (6) and a circulating pump stabilizing housing (7), the top end of the sewage treatment circulating pump body (1) is provided with a circulating pump driving mechanism (4), a circulating pump stabilizing housing (7) is arranged on the outer side of the sewage treatment circulating pump body (1), the bottom end of the circulating pump stabilizing housing (7) is provided with a circulating pump stabilizing base (2), a sewage treatment filter screen (3) is arranged on the side surface of the circulating pump stabilizing housing (7), a passive dredging mechanism control terminal (6) is arranged on the inner side of the circulating pump stable housing (7), and a circulating pump driven dredging mechanism (5) is arranged on the inner side surface of the sewage treatment filter screen (3).
2. The sewage treatment circulation pump of claim 1, wherein: the top end of the circulating pump stabilizing base (2) is provided with a stabilizing base top plate (8), the inner side of the stabilizing base top plate (8) is provided with a housing locking bolt (9), and the bottom end of the stabilizing base top plate (8) is provided with a top plate adjusting support rod (10).
3. The sewage treatment circulation pump of claim 1, wherein: sewage treatment filter screen (3) one end head is provided with stabilizes housing contact port (11), stabilize housing contact port (11) medial surface bolt circulation pump and stabilize housing (7).
4. The sewage treatment circulation pump of claim 1, wherein: the side of the sewage treatment filter screen (3) is provided with a dredging mechanism guide rail (12), and the inner side of the dredging mechanism guide rail (12) is connected with a circulating pump driven dredging mechanism (5).
5. The sewage treatment circulation pump of claim 1, wherein: the sewage treatment filter screen (3) is of a strip-shaped barrel-shaped structure.
6. The sewage treatment circulation pump of claim 1, wherein: the circulating pump driving mechanism (4) top is provided with actuating mechanism and connects electric port (13), actuating mechanism connects electric port (13) side and is provided with actuating mechanism rings (14), circulating pump driving mechanism (4) bottom is provided with supplementary fixed knot structure sleeve (15).
7. The sewage treatment circulation pump of claim 1, wherein: the passive dredging mechanism (5) of the circulating pump is arranged into a cross structure.
8. The sewage treatment circulation pump of claim 1, wherein: the passive dredging mechanism (5) middle part of circulating pump is provided with passive dredging actuating mechanism (16), the passive dredging mechanism (5) side of circulating pump is provided with desilting removal gyro wheel (17), desilting removal gyro wheel (17) side is connected desilting mechanism guide rail (12).
9. The sewage treatment circulation pump of claim 1, wherein: passive desilting mechanism control terminal (6) bottom is provided with inhales empty vibration response probe rod (25), passive desilting mechanism control terminal (6) top is provided with control terminal wiring port (18), passive desilting mechanism control terminal (6) side is provided with desilting mechanism wiring port (19).
10. The sewage treatment circulation pump of claim 1, wherein: the circulating pump stabilizes housing (7) top and is provided with supplementary fixed sleeve recess (20), the inboard bottom of housing (7) is stabilized to the circulating pump is provided with circulating pump shock attenuation liner (21), circulating pump shock attenuation liner (21) top is provided with circulating pump subassembly (22), circulating pump actuating mechanism (4) is connected on circulating pump subassembly (22) top, housing (7) side is stabilized to the circulating pump is provided with sewage import (23), housing (7) top is stabilized to the circulating pump is provided with sewage outlet (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158491.4A CN112283118A (en) | 2020-10-26 | 2020-10-26 | Sewage treatment circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158491.4A CN112283118A (en) | 2020-10-26 | 2020-10-26 | Sewage treatment circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283118A true CN112283118A (en) | 2021-01-29 |
Family
ID=74373061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011158491.4A Pending CN112283118A (en) | 2020-10-26 | 2020-10-26 | Sewage treatment circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112283118A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04179601A (en) * | 1990-07-12 | 1992-06-26 | Sekisui Plastics Co Ltd | Refuse disposal method |
| JPH0734504A (en) * | 1993-07-20 | 1995-02-03 | Matsushita Electric Ind Co Ltd | Garbage conveyance device |
| CN202348702U (en) * | 2011-11-17 | 2012-07-25 | 杭州银江环保科技有限公司 | Submersible type pipeline pump |
| CN103527495A (en) * | 2013-09-18 | 2014-01-22 | 天津好为节能环保科技发展有限公司 | Non-negative-pressure water pump with filtering device |
| CN204082695U (en) * | 2014-08-07 | 2015-01-07 | 杭州中环化工设备有限公司 | Blower fan automatic flushing device |
| CN110238139A (en) * | 2019-07-03 | 2019-09-17 | 苏州力佳达电子科技有限公司 | Pipe dredging underwater robot with ultrasonic wave addi-tional crusher |
| CN210003576U (en) * | 2019-02-28 | 2020-01-31 | 北京铂阳顶荣光伏科技有限公司 | kinds of filter screen check out test set and fan system |
| CN210715165U (en) * | 2019-09-23 | 2020-06-09 | 山西解州合盛兴泵业有限公司 | Low-consumption axial-flow pump capable of automatically identifying rotation capacity of structure |
| CN211288109U (en) * | 2019-12-28 | 2020-08-18 | 内蒙古城市规划市政设计研究院有限公司 | Pneumatic self-priming pump for domestic garbage treatment |
-
2020
- 2020-10-26 CN CN202011158491.4A patent/CN112283118A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04179601A (en) * | 1990-07-12 | 1992-06-26 | Sekisui Plastics Co Ltd | Refuse disposal method |
| JPH0734504A (en) * | 1993-07-20 | 1995-02-03 | Matsushita Electric Ind Co Ltd | Garbage conveyance device |
| CN202348702U (en) * | 2011-11-17 | 2012-07-25 | 杭州银江环保科技有限公司 | Submersible type pipeline pump |
| CN103527495A (en) * | 2013-09-18 | 2014-01-22 | 天津好为节能环保科技发展有限公司 | Non-negative-pressure water pump with filtering device |
| CN204082695U (en) * | 2014-08-07 | 2015-01-07 | 杭州中环化工设备有限公司 | Blower fan automatic flushing device |
| CN210003576U (en) * | 2019-02-28 | 2020-01-31 | 北京铂阳顶荣光伏科技有限公司 | kinds of filter screen check out test set and fan system |
| CN110238139A (en) * | 2019-07-03 | 2019-09-17 | 苏州力佳达电子科技有限公司 | Pipe dredging underwater robot with ultrasonic wave addi-tional crusher |
| CN210715165U (en) * | 2019-09-23 | 2020-06-09 | 山西解州合盛兴泵业有限公司 | Low-consumption axial-flow pump capable of automatically identifying rotation capacity of structure |
| CN211288109U (en) * | 2019-12-28 | 2020-08-18 | 内蒙古城市规划市政设计研究院有限公司 | Pneumatic self-priming pump for domestic garbage treatment |
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Application publication date: 20210129 |
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