CN111594454B - Direct-connection vertical double-suction pump - Google Patents
Direct-connection vertical double-suction pump Download PDFInfo
- Publication number
- CN111594454B CN111594454B CN202010437357.1A CN202010437357A CN111594454B CN 111594454 B CN111594454 B CN 111594454B CN 202010437357 A CN202010437357 A CN 202010437357A CN 111594454 B CN111594454 B CN 111594454B
- Authority
- CN
- China
- Prior art keywords
- suction chamber
- pump
- water
- impeller
- shaft
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000007789 sealing Methods 0.000 claims description 28
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- F04D29/08—Sealings
- F04D29/086—Sealings 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
- F04D29/40—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a direct-connection vertical double-suction pump, which comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a water return pipe part, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot, wherein the upper suction chamber is connected with the lower suction chamber; the impeller and the motor are of a direct-connection structure, the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; the water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber. The invention has small occupied area, saves space, can eliminate the transmission energy loss caused by the transmission of the coupler, and can further improve the efficiency of the unit.
Description
Technical Field
The invention relates to a double-suction pump, in particular to a direct-connection type vertical double-suction pump which has small occupied area, saves space, can eliminate transmission energy loss caused by transmission of a coupling and can further improve the efficiency of a unit.
Background
In general machinery, the pump products are consumers with high power consumption, so that under the large environment of energy conservation and emission reduction, if the efficiency of the water pump can be improved, a large amount of electric energy consumption can be saved, and the purposes of energy conservation and consumption reduction are achieved. The specific rotation speed is an important parameter of the water pump and reflects the relation among the flow rate, the rotation speed and the lift of the water pump. In the case of a centrifugal pump, when the specific rotational speed is within a certain range, the efficiency is high, and if the specific rotational speed is too large or too small, the efficiency of the water pump is lowered. Therefore, if the single-stage single-suction centrifugal pump with larger specific rotation speed can be designed into the single-stage double-suction centrifugal pump with moderate specific rotation speed, the efficiency of the water pump can be improved to a certain extent, thereby achieving the purposes of energy conservation and emission reduction.
Disclosure of Invention
Aiming at the problems, the main purpose of the invention is to provide the direct-connection type vertical double-suction pump which has small occupied area, saves space, can eliminate the transmission energy loss caused by the transmission of the coupler and can further improve the efficiency of a unit.
The invention solves the technical problems by the following technical proposal: a direct-connection vertical double-suction pump; the direct-connection vertical double suction pump comprises: the water pump comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a water return pipe component, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot.
The motor is connected with the pump cover through a first fastener; the pump cover is connected with the pump body through a second fastener; the impeller and the motor are of a direct connection structure and share one shaft; the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; and a water return pipe component is arranged at a position close to the outlet of the pump body.
The water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber.
In a specific embodiment of the present invention: a first sealing ring is arranged between the pump body and the impeller, and a second sealing ring is arranged between the pump cover and the impeller; an O-shaped sealing ring is arranged between the pump cover and the pump body; a water blocking ring is arranged below the motor.
In a specific embodiment of the present invention: the shaft and the impeller are locked and fixed through a locking nut.
In a specific embodiment of the present invention: the outer diameter of the water retaining ring is 15-30mm larger than the inner diameter, and the thickness of the water retaining ring is 5-15mm.
In a specific embodiment of the present invention: the first fastener has a gauge of M16 or a number of 4 or 8.
In a specific embodiment of the present invention: the thickness range of the first sealing ring is as follows: 20-50mm, the width range is: 10-15mm.
In a specific embodiment of the present invention: the second sealing ring and the pump cover are cast into a whole, the second sealing ring and the pump cover are connected through two reinforcing ribs, the thickness range of the second sealing ring is 30-70mm, and the width range is 40-100mm.
In a specific embodiment of the present invention: the cross section diameter of the O-shaped sealing ring is 7mm, and the inner diameter is 410-570mm.
In a specific embodiment of the present invention: a serrated pressure relief groove is formed in the spigot; the depth and width ranges of the pressure relief groove are: 0.8-1.5mm.
In a specific embodiment of the present invention: the thickness range of the baffle is as follows: 15-30mm.
The invention has the positive progress effects that: the direct-connection vertical double-suction pump provided by the invention has the following advantages: the invention is a direct connection type double suction pump, the vertical double suction pump is not direct connection type, the similar products are generally provided with a coupler, and the invention cancels the coupler.
The invention has the advantages that the notch is provided with the serrated pressure relief groove, the middle part of the lower suction chamber is cast with the water guide cone, the baffle is cast on one side of the lower suction chamber, which is close to the water outlet section, and the water inlet section is designed into a cone shape, so that the overflow area can be increased, the flow velocity can be reduced, the hydraulic loss can be reduced, and the efficiency can be improved.
The invention has small occupied area, saves space, can eliminate the transmission energy loss caused by the transmission of the coupler, and can further improve the efficiency of the unit.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a partial enlarged view of fig. 1.
Fig. 3 is a schematic structural view (at a) of fig. 1 and 2, in which a serrated pressure relief groove is formed on the spigot.
The following are names corresponding to the reference numerals in the present invention:
The water retaining ring 2, the first fastening piece 3, the pump cover 4, the pump body 5, the impeller 6, the first sealing ring 7, the sliding bearing 8, the shaft 9, the lock nut 10, the key 11, the water return pipe component 12, the second sealing ring 13, the second fastening piece 14, the O-shaped sealing ring 15, the water inlet section 16, the upper suction chamber 17, the volute chamber 18, the lower suction chamber 19, the water guide cone 20, the baffle 21, the water outlet section 22, the spigot 23 and the pressure relief groove 24.
Detailed Description
The following description of the preferred embodiments of the present invention is given with reference to the accompanying drawings, so as to explain the technical scheme of the present invention in detail.
The invention provides a direct-connection type vertical double suction pump, wherein fig. 1 is a schematic diagram of the whole structure of the pump, fig. 2 is a partial enlarged view of fig. 1, fig. 3 is a schematic diagram (A) of the structure of the notch with saw-tooth pressure relief grooves processed on the seam allowance in fig. 1 and 2, and as shown in fig. 1-3, the direct-connection type vertical double suction pump provided by the invention comprises: the water retaining ring 2, the first fastening piece 3, the pump cover 4, the pump body 5, the impeller 6, the first sealing ring 7, the sliding bearing 8, the shaft 9, the lock nut 10, the key 11, the water return pipe component 12, the second sealing ring 13, the second fastening piece 14, the O-shaped sealing ring 15, the water inlet section 16, the upper suction chamber 17, the volute chamber 18, the lower suction chamber 19, the water guide cone 20, the baffle 21, the water outlet section 22 and the spigot 23.
The water inlet section 16 is communicated with the upper suction chamber 17 and the lower suction chamber 19; the volute chamber 18 is communicated with the upper suction chamber 17 and the lower suction chamber 19; the water outlet section 16 is communicated with the volute chamber 18; a water guide cone 20 is cast in the middle of the lower suction chamber 19, a baffle 21 is cast on one side of the lower suction chamber 19 close to the water outlet section 22, and a spigot 23 is arranged on the inner wall of the volute chamber 18 communicated with the upper suction chamber 17.
The motor 1 is connected with the pump cover 4 through a first fastener 3; the pump cover 4 is connected with the pump body 5 through a second fastening piece 14; the impeller 6 and the motor 1 are in a direct connection structure and share one shaft 9; the shaft 9 and the impeller 6 are driven by a key 11, and the shaft 9 and the impeller 6 are locked and fixed by a locking nut 10; a sliding bearing 8 is arranged in the pump body 5, and the lower end of the shaft 9 is fixed through the sliding bearing 8 so as to prevent the pump shaft from swinging during operation; a first sealing ring 7 is arranged between the pump body 5 and the impeller 6, a second sealing ring 13 is arranged between the pump cover 4 and the impeller 6, and the two sealing rings have the function of reducing leakage of high-pressure water in the pump body to an inlet of the impeller; a water return pipe part 12 is arranged at a position close to the outlet of the pump body and is used for guiding high-pressure water in the pump body to the position of the mechanical seal 16 so as to lubricate and cool the mechanical seal; an O-shaped sealing ring 15 is arranged between the pump cover 4 and the pump body 5 so as to prevent high-pressure water in the pump body from leaking along a gap between the pump body and the pump cover; below the motor 1 is mounted a water deflector 2, which serves to prevent small amounts of liquid leaking from the mechanical seal 16 from entering the motor interior along the shaft.
A serrated pressure relief groove is formed in the spigot; a serrated pressure relief groove 24 is formed in the spigot 23; the depth and width ranges of the pressure relief groove are: 0.8-1.5mm. The thickness range of the baffle 21 is: 15-30mm.
The pressure relief groove 24 serves to reduce leakage of high pressure water from the volute chamber along the spigot into the upper suction chamber, thereby reducing leakage loss and improving volumetric efficiency.
According to the invention, the thickness and the size of the water retaining ring 2 are changed along with the thickness of the shaft diameter, the inner diameter cross section of the water retaining ring 2 is arc-shaped so as to ensure that the water retaining ring is in tight fit with the shaft, the outer diameter is 15-30mm larger than the inner diameter, and the thickness is 5-15mm.
The first fastening member 3 in the invention has the specification of M16 or M20, and the number of the first fastening member is 4 or 8, and the number and the size depend on the power of the motor.
The first sealing ring 7 is made of heat-treated wear-resistant materials, and has a thickness ranging from 20 mm to 50mm and a width ranging from 10mm to 15mm.
The lock nut 10 is made of stainless steel, so that the lock nut can be prevented from being difficult to disassemble due to rust and shaft locking, the lock nut is fully made of fine threads to increase locking capacity, the thread pitch is 2mm, and the large diameter of the threads is slightly smaller than the shaft diameter to ensure convenient installation.
The keys 11 are all made of stainless steel, the specification and the size of the keys are changed along with the shaft diameter, the width range of the keys is 16-22mm, the height range of the keys is 10-14mm, and the length of the keys is 85mm.
The water return pipe part 12 is used for guiding high-pressure water at the outlet of the pump body to the position of the mechanical seal to flush the mechanical seal so as to prevent the mechanical seal from being damaged due to dry friction, the water return pipe part 12 is made of a metal hose, and the inner diameter is 12mm.
The second sealing ring 13 is cast integrally with the pump cover 4 and is connected by two reinforcing ribs, the purpose of which is to facilitate assembly, and the thickness range is 30-70mm and the width range is 40-100mm.
The second fasteners 14 are M16 in size, 8 or 12 in number, which number varies with the size of the impeller diameter;
In the invention, the O-shaped sealing ring 15 is made of rubber II-2, the cross section diameter is 7mm, the inner diameter is 410-570mm, and the size of the inner diameter is changed along with the size of the impeller diameter.
The saw-tooth pressure relief grooves are formed in the rabbets, so that leakage loss of working medium can be reduced; a water guide cone is cast in the middle of the lower suction chamber to play a role in guiding flow, so that hydraulic loss is reduced; a baffle plate is cast on one side of the lower suction chamber close to the water outlet section, so that vortex formation at the inlet of the impeller can be prevented; the water inlet section is designed into a cone shape, so that the flow area can be increased, the flow speed can be reduced, the hydraulic loss can be reduced, and the efficiency can be improved.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (3)
1. A direct-connection vertical double-suction pump; the method is characterized in that: the direct-connection vertical double suction pump comprises: the device comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a water return pipe component, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot;
the motor is connected with the pump cover through a first fastener; the pump cover is connected with the pump body through a second fastener; the impeller and the motor are of a direct connection structure and share one shaft; the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; a water return pipe part is arranged at a position close to the outlet of the pump body;
The water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber;
A first sealing ring is arranged between the pump body and the impeller, and a second sealing ring is arranged between the pump cover and the impeller; an O-shaped sealing ring is arranged between the pump cover and the pump body; a water blocking ring is arranged below the motor;
the shaft and the impeller are locked and fixed through a locking nut;
The outer diameter of the water retaining ring is 15-30mm larger than the inner diameter, and the thickness of the water retaining ring is 5-15mm;
The thickness range of the first sealing ring is as follows: 20-50mm, the width range is: 10-15mm;
The second sealing ring and the pump cover are cast into a whole, the second sealing ring and the pump cover are connected through two reinforcing ribs, the thickness range of the second sealing ring is 30-70mm, and the width range is 40-100mm;
A serrated pressure relief groove is formed in the spigot; the depth and width ranges of the pressure relief groove are: 0.8-1.5mm;
The thickness range of the baffle is as follows: 15-30mm.
2. The direct connection vertical double suction pump according to claim 1, wherein the first fastener has a gauge of M16 or a number of 4 or 8.
3. The direct connection type vertical double suction pump according to claim 1, wherein the cross-sectional diameter of the O-ring is 7mm and the inner diameter is 410-570mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437357.1A CN111594454B (en) | 2020-05-21 | 2020-05-21 | Direct-connection vertical double-suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437357.1A CN111594454B (en) | 2020-05-21 | 2020-05-21 | Direct-connection vertical double-suction pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111594454A CN111594454A (en) | 2020-08-28 |
| CN111594454B true CN111594454B (en) | 2024-05-17 |
Family
ID=72186092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010437357.1A Active CN111594454B (en) | 2020-05-21 | 2020-05-21 | Direct-connection vertical double-suction pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594454B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209278142U (en) * | 2018-12-28 | 2019-08-20 | 张玉新 | Diving high-efficiency double suction pump |
| CN212563804U (en) * | 2020-05-27 | 2021-02-19 | 上海凯泉泵业（集团）有限公司 | Vertical double suction pump body |
| CN212563669U (en) * | 2020-05-21 | 2021-02-19 | 上海凯泉泵业（集团）有限公司 | Vertical double entry pump of direct-connected type |
| CN113294347A (en) * | 2021-06-30 | 2021-08-24 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump and design method thereof |
| CN115388010A (en) * | 2022-06-28 | 2022-11-25 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump with suction chamber hydraulic structure and design method |
-
2020
- 2020-05-21 CN CN202010437357.1A patent/CN111594454B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209278142U (en) * | 2018-12-28 | 2019-08-20 | 张玉新 | Diving high-efficiency double suction pump |
| CN212563669U (en) * | 2020-05-21 | 2021-02-19 | 上海凯泉泵业（集团）有限公司 | Vertical double entry pump of direct-connected type |
| CN212563804U (en) * | 2020-05-27 | 2021-02-19 | 上海凯泉泵业（集团）有限公司 | Vertical double suction pump body |
| CN113294347A (en) * | 2021-06-30 | 2021-08-24 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump and design method thereof |
| CN115388010A (en) * | 2022-06-28 | 2022-11-25 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump with suction chamber hydraulic structure and design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111594454A (en) | 2020-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108869379B (en) | Centrifugal pump sealing ring with axial guide vanes | |
| CN209990691U (en) | End suction type direct connection double-suction pump | |
| CN111594454B (en) | Direct-connection vertical double-suction pump | |
| CN212563669U (en) | Vertical double entry pump of direct-connected type | |
| US10330110B2 (en) | Pump impeller | |
| CN203394792U (en) | Energy-saving multistage deep well submersible and centrifugal pump | |
| CN201627724U (en) | Vertical multi-stage centrifugal pump | |
| CN105805046A (en) | Device for improving internal flow stability of diagonal flow pump | |
| CN115263762A (en) | Single-stage double-suction centrifugal pump with additional sealing cavity structure | |
| US20230400026A1 (en) | Open impeller for submergible pump configured for pumping liquid comprising abrasive matter | |
| CN103835987A (en) | Low-temperature deep-well pump | |
| CN208546323U (en) | A kind of sand-proof type injection immersible pump | |
| KR100438083B1 (en) | Pump by using a disuse tire | |
| CN113294347A (en) | Vertical double-suction pump and design method thereof | |
| RU94644U1 (en) | MULTI-STAGE PUMP | |
| CN217206894U (en) | Multi-stage centrifugal pump | |
| WO2008038306A2 (en) | An improved ceramic integral vanes impeller | |
| CN216589136U (en) | Anti-blocking, anti-scaling and anti-foreign matter deposition blade guide wheel structure and centrifugal pump | |
| CN212389537U (en) | Automobile water pump assembly | |
| CN221423537U (en) | Centrifugal pump impeller and centrifugal pump | |
| CN220979935U (en) | Double-volute pump body and vertical centrifugal pump | |
| KR200294950Y1 (en) | Pump by using a disuse tire | |
| CN210343852U (en) | Mixed-flow pump body | |
| CN215719575U (en) | Water pump for conveying bilge oil sewage in diving chamber | |
| CN212898973U (en) | Anti-blocking corrosion-resistant efficient self-sucking pump |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |