CN112253471A - High-temperature high-pressure multi-stage pump - Google Patents
High-temperature high-pressure multi-stage pump Download PDFInfo
- Publication number
- CN112253471A CN112253471A CN202011156758.6A CN202011156758A CN112253471A CN 112253471 A CN112253471 A CN 112253471A CN 202011156758 A CN202011156758 A CN 202011156758A CN 112253471 A CN112253471 A CN 112253471A
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- CN
- China
- Prior art keywords
- multistage pump
- pump
- multistage
- stage pump
- high pressure
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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
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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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage 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
- 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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
- F04D15/0083—Protection against sudden pressure change, e.g. check valves
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
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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
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a high-temperature high-pressure multistage pump, which comprises a main body, a high-pressure multistage pump body, a multistage pump drive control mechanism, a multistage pump rotating shaft housing, a multistage pump high-temperature safety shield and a multistage pump damping base, high pressure detection self-sealing mechanism, multistage pump auxiliary control ware, this top of high pressure multistage pump is provided with multistage pump drive control mechanism, multistage pump drive control mechanism bottom is provided with multistage pump pivot housing, the multistage pump pivot housing outside is provided with multistage pump high temperature safety guard, multistage pump pivot housing bottom is provided with multistage pump vibration damping mount, multistage pump pivot housing top side is provided with high pressure detection self-sealing mechanism, high pressure detection self-sealing mechanism side is provided with multistage pump auxiliary control ware, the device simple structure, installation operation is convenient, unnecessary collides with when can greatly reduced installation is torn open and is examined, reduce the high temperature high pressure by-pass unsafe factor.
Description
Technical Field
The invention relates to the technical field of high-pressure fluid driving equipment, in particular to a high-temperature high-pressure multistage pump.
Background
High temperature high pressure multistage pump generally is applicable to the power generation boiler field, the transport fluid possesses the characteristics of high temperature high pressure, traditional boiler water pump power is little, break down easily under high temperature environment, the boiler influences the normal output and the operation of equipment, because the water pump that can appear often to have high pressure output transships, the unable condition of normally closing can appear, if the seepage appears under high temperature high pressure state, just very easily take place unsafe factor, can use comparatively safe multistage pump in the great water room boiler field of discharge, but the multistage pump noise is big, easy the breaking of colliding with of appearing when overhauing, and mostly be remote control, be difficult to timely when equipment takes place the superpressure and make the counter-measure, so how to solve above-mentioned problem and become the difficult problem that present urgent need to solve.
Disclosure of Invention
The invention aims to provide a multistage pump which is simple in structure, convenient to install, operate and use, capable of greatly reducing unnecessary collision during installation and disassembly and inspection and reducing unsafe factors attached to high temperature and high pressure.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high temperature high pressure multistage pump main part includes the high pressure multistage pump body, multistage pump drive control mechanism, multistage pump pivot housing, multistage pump high temperature safety guard, multistage pump vibration damping mount, high pressure detection self-sealing mechanism, multistage pump auxiliary control ware, high pressure multistage pump body top is provided with multistage pump drive control mechanism, multistage pump drive control mechanism bottom is provided with multistage pump pivot housing, multistage pump pivot housing outside is provided with multistage pump high temperature safety guard, multistage pump pivot housing bottom is provided with multistage pump vibration damping mount, multistage pump pivot housing top side is provided with high pressure detection self-sealing mechanism, high pressure detection self-sealing mechanism side is provided with multistage pump auxiliary control ware.
Preferably, a multi-stage pump driving motor is arranged at the top end of the multi-stage pump driving control mechanism, a driving motor comprehensive power junction box is arranged on the side face of the multi-stage pump driving motor, an emergency manual brake switch is arranged on the side face of the driving motor comprehensive power junction box, and the bottom end of the multi-stage pump driving motor is connected with the top end of a multi-stage pump rotating shaft housing.
Preferably, a multi-stage pump output rotor is arranged on the inner side of the multi-stage pump rotating shaft housing, a sealing mechanism mounting groove hole is formed in the side face of the multi-stage pump rotating shaft housing, arc chamfers are arranged on the inner sides of two ends of the multi-stage pump rotating shaft housing, a fluid inlet/outlet port is formed in the side faces of two ends of the multi-stage pump rotating shaft housing, and a damping base contact port is formed in the bottom end of the multi-stage.
Preferably, the multistage pump high-temperature safety shield is arranged in a barrel-shaped multi-lobe structure.
Preferably, the inner side of the high-temperature safety shield of the multistage pump is provided with a heat-resistant noise-reducing material, the outer side of the heat-resistant noise-reducing material is provided with a metal wrapping layer, the outer side of the metal wrapping layer is provided with a high-temperature isolation coating, and the side face of the high-temperature safety shield of the multistage pump is provided with a shield locking lug plate.
Preferably, the bottom end of the multistage pump damping base is provided with a base damping cushion, and the bottom end of the base damping cushion is provided with a wear-resistant contact bottom plate.
Preferably, a bearing flange is arranged at the top end of the multistage pump damping base and is connected with the damping base contact port.
Preferably, a controller fixing port is arranged at the top end of the high-pressure detection automatic closing mechanism, an external pipeline for high-pressure detection is arranged at the bottom end of the controller fixing port, a fluid pressure indicator is arranged at the other end of the external pipeline for high-pressure detection, an electronic alarm mechanism is arranged on the side surface of the fluid pressure indicator, and a pipeline closing stop valve is arranged on the inner side of the external pipeline for high-pressure detection.
Preferably, a controller power supply wiring is arranged at the top end of the auxiliary controller of the multi-stage pump, and an overpressure information transmitting mechanism is arranged on the side face of the auxiliary controller of the multi-stage pump.
Preferably, an auxiliary information processing terminal is arranged inside the multi-stage pump auxiliary controller.
Compared with the prior art, the invention has the beneficial effects that:
(1) the multi-stage pump driving control mechanism can realize remote control and manual operation, avoids unnecessary trouble during maintenance, reduces the maintenance difficulty, and simultaneously avoids unsafe factors possibly caused by misoperation.
(2) The multistage pump rotating shaft housing can reduce the impact force of high-pressure fluid on the inner shell, and meanwhile, the arc chamfer angle can also improve the flow velocity of the fluid and reduce vibration.
(3) Multistage pump high temperature safety guard shield can avoid the high temperature to scald, and the installation and the dismantlement of being convenient for simultaneously can also play the effect of making an uproar of falling when keeping apart the high temperature.
(4) Multistage pump vibration damping mount can avoid directly colliding with when hoist and mount and dismantlement, avoids causing the cracked effect of unnecessary casing, possesses the noise reduction simultaneously and reduces vibrations.
(5) The high-pressure detection automatic closing mechanism can rapidly feed back information through the auxiliary controller of the multi-stage pump and close the external pipeline for high-pressure detection under the condition that the multi-stage pump has overpressure, and the high-pressure detection automatic closing mechanism can restore to a normal working state after the overpressure problem is solved, so that the larger economic loss is effectively avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the drive control mechanism of the multi-stage pump of the present invention;
FIG. 3 is a schematic view of the structure of the multi-stage pump shaft housing of the present invention;
FIG. 4 is a schematic view of the multi-stage pump high temperature safety shield of the present invention;
FIG. 5 is a schematic view of the multi-stage pump damping mount according to the present invention;
FIG. 6 is a schematic structural view of the high pressure detection self-sealing mechanism of the present invention;
FIG. 7 is a schematic diagram of an auxiliary controller of a multi-stage pump according to the present invention
In the figure: 1. a high pressure multi-stage pump body; 2. a multistage pump drive control mechanism; 3. a multi-stage pump rotating shaft housing; 4. a multi-stage pump high temperature safety shield; 5. a multi-stage pump damping mount; 6. a high-pressure detection automatic closing mechanism; 7. a multi-stage pump auxiliary controller; 8. a multi-stage pump drive motor; 9. a drive motor integrated power junction box; 10. an emergency manual brake switch; 11. a multi-stage pump output rotor; 12. the sealing mechanism is provided with a slotted hole; 13. chamfering with an arc; 14. a fluid inlet port; 15. a shock mount contact port; 16. a heat resistant noise reducing material; 17. a metal wrapping layer; 18. a high temperature barrier coating; 19. the guard shield locks the ear plate; 20. a base damping cushion; 21. a wear resistant contact base plate; 22. a load-bearing flange; 23. a controller fixed port; 24. an external pipeline for high-pressure detection; 25. a fluid pressure indicator gauge; 26. an electronic alarm mechanism; 27. a pipeline closing stop valve; 28. a controller power connection; 29. an overpressure information transmitting mechanism; 30. an auxiliary information processing terminal.
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 body comprises a high-pressure multi-stage pump body 1, a multi-stage pump drive control mechanism 2, a multi-stage pump rotating shaft housing 3, a multi-stage pump high-temperature safety shield 4, a multi-stage pump damping mount 5, a high-pressure detection automatic closing mechanism 6 and a multi-stage pump auxiliary controller 7, the multi-stage pump drive control mechanism 2 is arranged on the top end of the high-pressure multi-stage pump body 1, the multi-stage pump rotating shaft housing 3 is arranged at the bottom end of the multi-stage pump drive control mechanism 2, the multi-stage pump high-temperature safety shield 4 is arranged on the outer side of the multi-stage pump rotating shaft housing 3, the multi-stage pump damping mount 5 is arranged at the bottom end of the multi-stage pump rotating shaft housing 3, the.
As shown in fig. 2, a multistage pump driving motor 8 is arranged at the top end of the multistage pump driving control mechanism 2, a driving motor comprehensive power junction box 9 is arranged on the side surface of the multistage pump driving motor 8, an emergency manual brake switch 10 is arranged on the side surface of the driving motor comprehensive power junction box 9, and the bottom end of the multistage pump driving motor 8 is connected with the top end of the multistage pump rotating shaft housing 3.
As shown in fig. 3, a multi-stage pump output rotor 11 is arranged on the inner side of the multi-stage pump rotating shaft housing 3, a sealing mechanism mounting slot 12 is arranged on the side surface of the multi-stage pump rotating shaft housing 3, arc chamfers 13 are arranged on the inner sides of two ends of the multi-stage pump rotating shaft housing 3, a fluid inlet/outlet port 14 is arranged on the side surface of two ends of the multi-stage pump rotating shaft housing 3, and a damping base contact port 15 is arranged at the bottom end of the multi-.
As shown in fig. 4, the multi-stage pump high-temperature safety shield 4 is set to be a barrel-shaped multi-petal structure, the inner side of the multi-stage pump high-temperature safety shield 4 is provided with a heat-resistant noise-reducing material 16, the outer side of the heat-resistant noise-reducing material 16 is provided with a metal wrapping layer 17, the outer side of the metal wrapping layer 17 is provided with a high-temperature isolation coating 18, and the side surface of the multi-stage pump high-temperature safety shield 4 is provided with.
As shown in fig. 5, the bottom end of the multistage pump damping mount 5 is provided with a mount damping cushion 20, the bottom end of the mount damping cushion 20 is provided with a wear-resistant contact bottom plate 21, the top end of the multistage pump damping mount 5 is provided with a bearing flange 22, and the bearing flange 22 is connected with the damping mount contact port 15.
As shown in fig. 6, a controller fixing port 23 is provided at the top end of the high-pressure detection automatic closing mechanism 6, an external pipeline 24 for high-pressure detection is provided at the bottom end of the controller fixing port 23, a fluid pressure indicator 25 is provided at the other end of the external pipeline 24 for high-pressure detection, an electronic alarm mechanism 26 is provided at the side of the fluid pressure indicator 25, and a pipeline closing stop valve 27 is provided at the inner side of the external pipeline 24 for high-pressure detection.
As shown in fig. 7, a controller power supply connection 28 is provided at the top end of the auxiliary controller 7 for the multi-stage pump, an overpressure information transmitting mechanism 29 is provided at the side of the auxiliary controller 7 for the multi-stage pump, and an auxiliary information processing terminal 30 is provided at the inner side of the auxiliary controller 7 for the multi-stage pump.
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. A high-temperature high-pressure multistage pump is characterized in that: the main body comprises a high-pressure multi-stage pump body (1), a multi-stage pump drive control mechanism (2), a multi-stage pump rotating shaft housing (3), a multi-stage pump high-temperature safety shield (4), a multi-stage pump damping base (5), a high-pressure detection automatic closing mechanism (6) and a multi-stage pump auxiliary controller (7), the top end of the high-pressure multi-stage pump body (1) is provided with a multi-stage pump driving control mechanism (2), the bottom end of the multi-stage pump driving control mechanism (2) is provided with a multi-stage pump rotating shaft housing (3), a multistage pump high-temperature safety shield (4) is arranged on the outer side of the multistage pump rotating shaft housing (3), the bottom end of the multistage pump rotating shaft housing (3) is provided with a multistage pump damping base (5), the side surface of the top end of the multistage pump rotating shaft housing (3) is provided with a high-pressure detection automatic closing mechanism (6), and a multistage pump auxiliary controller (7) is arranged on the side surface of the high-pressure detection automatic closing mechanism (6).
2. A high temperature and high pressure multistage pump according to claim 1, wherein: the multi-stage pump drive control mechanism (2) top is provided with multi-stage pump driving motor (8), multi-stage pump driving motor (8) side is provided with driving motor and synthesizes electric power terminal box (9), driving motor synthesizes electric power terminal box (9) side and is provided with urgent manual brake switch (10), multi-stage pump pivot housing (3) top is connected to multi-stage pump driving motor (8) bottom.
3. A high temperature and high pressure multistage pump according to claim 1, wherein: multistage pump pivot housing (3) inboard is provided with multistage pump output rotor (11), multistage pump pivot housing (3) side is provided with closing mechanism installation slotted hole (12), multistage pump pivot housing (3) both ends inboard is provided with circular arc chamfer (13), multistage pump pivot housing (3) both ends side is provided with fluid and advances a port (14), multistage pump pivot housing (3) bottom is provided with vibration damping mount contact port (15).
4. A high temperature and high pressure multistage pump according to claim 1, wherein: the high-temperature safety shield (4) of the multistage pump is of a barrel-shaped multi-petal structure.
5. A high temperature and high pressure multistage pump according to claim 1, wherein: multistage pump high temperature safety guard shield (4) inboard is provided with heat-resisting material (16) of making an uproar that fall, heat-resisting material (16) of making an uproar outside of making an uproar that falls is provided with metal wrapping layer (17), metal wrapping layer (17) outside is provided with high temperature barrier coating (18), multistage pump high temperature safety guard shield (4) side is provided with guard shield locking otic placode (19).
6. A high temperature and high pressure multistage pump according to claim 1, wherein: multistage pump vibration damping mount (5) bottom is provided with base shock attenuation cushion (20), base shock attenuation cushion (20) bottom is provided with wear-resisting contact bottom plate (21).
7. A high temperature and high pressure multistage pump according to claim 1, wherein: the multi-stage pump damping base (5) top is provided with bearing flange (22), damping base contact port (15) are connected to bearing flange (22).
8. A high temperature and high pressure multistage pump according to claim 1, wherein: the high pressure detects self-sealing mechanism (6) top and is provided with controller fixed port (23), controller fixed port (23) bottom is provided with external pipeline (24) for the high pressure detection, the high pressure detects and is provided with fluid pressure indicator (25) with external pipeline (24) other end, fluid pressure indicator (25) side is provided with electronic alarm mechanism (26), the high pressure detects and is provided with pipeline sealing stop valve (27) with external pipeline (24) inboard.
9. A high temperature and high pressure multistage pump according to claim 1, wherein: the top end of the auxiliary controller (7) of the multi-stage pump is provided with a controller power supply wiring (28), and the side surface of the auxiliary controller (7) of the multi-stage pump is provided with an overpressure information transmitting mechanism (29).
10. A high temperature and high pressure multistage pump according to claim 1, wherein: and an auxiliary information processing terminal (30) is arranged on the inner side of the multistage pump auxiliary controller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011156758.6A CN112253471A (en) | 2020-10-26 | 2020-10-26 | High-temperature high-pressure multi-stage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011156758.6A CN112253471A (en) | 2020-10-26 | 2020-10-26 | High-temperature high-pressure multi-stage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253471A true CN112253471A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011156758.6A Pending CN112253471A (en) | 2020-10-26 | 2020-10-26 | High-temperature high-pressure multi-stage pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN112253471A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0664398B1 (en) * | 1994-01-21 | 1998-07-22 | WILO GmbH | Centrifugal pump with backflow prevention valve |
| CN2809277Y (en) * | 2005-02-01 | 2006-08-23 | 上海阿波罗机械制造有限公司 | Automatic monitoring device for non-seal self-priming pump |
| CN204226218U (en) * | 2014-05-09 | 2015-03-25 | 江苏华洋水箱给水设备有限公司 | Multistage pump |
| CN204532852U (en) * | 2015-02-26 | 2015-08-05 | 王强 | A kind of High Temperature High Pressure Vertical Heat water pump |
| CN204921393U (en) * | 2015-07-23 | 2015-12-30 | 上海弛泉泵阀(集团)有限公司 | Vertical multistage pump |
| US20180073509A1 (en) * | 2016-09-13 | 2018-03-15 | Grundfos Holding A/S | Centrifugal pump assembly |
| CN210033877U (en) * | 2019-04-12 | 2020-02-07 | 山东淄泵泵业有限公司 | Intelligent environment-friendly variable speed pump system based on Internet of things |
-
2020
- 2020-10-26 CN CN202011156758.6A patent/CN112253471A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0664398B1 (en) * | 1994-01-21 | 1998-07-22 | WILO GmbH | Centrifugal pump with backflow prevention valve |
| CN2809277Y (en) * | 2005-02-01 | 2006-08-23 | 上海阿波罗机械制造有限公司 | Automatic monitoring device for non-seal self-priming pump |
| CN204226218U (en) * | 2014-05-09 | 2015-03-25 | 江苏华洋水箱给水设备有限公司 | Multistage pump |
| CN204532852U (en) * | 2015-02-26 | 2015-08-05 | 王强 | A kind of High Temperature High Pressure Vertical Heat water pump |
| CN204921393U (en) * | 2015-07-23 | 2015-12-30 | 上海弛泉泵阀(集团)有限公司 | Vertical multistage pump |
| US20180073509A1 (en) * | 2016-09-13 | 2018-03-15 | Grundfos Holding A/S | Centrifugal pump assembly |
| CN210033877U (en) * | 2019-04-12 | 2020-02-07 | 山东淄泵泵业有限公司 | Intelligent environment-friendly variable speed pump system based on Internet of things |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210122 |