CN113027780A - Silent submersible pipeline pump - Google Patents
Silent submersible pipeline pump Download PDFInfo
- Publication number
- CN113027780A CN113027780A CN202110432052.6A CN202110432052A CN113027780A CN 113027780 A CN113027780 A CN 113027780A CN 202110432052 A CN202110432052 A CN 202110432052A CN 113027780 A CN113027780 A CN 113027780A
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- Prior art keywords
- chamber
- motor
- water
- water inlet
- shell
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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
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
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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
- F04D13/0606—Canned motor 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
- F04D29/007—Details, component parts, or accessories 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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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
- F04D29/08—Sealings
- F04D29/086—Sealings 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid 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
- F04D29/5806—Cooling the drive system
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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
- F04D29/5886—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling by injection
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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
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 silent submersible pipeline pump, which comprises: the base shell is internally provided with a water inlet chamber and a water outlet chamber, and the outer wall of the base shell is respectively provided with a water inlet communicated with the water inlet chamber and a water outlet communicated with the water outlet chamber; the bottom end of the cylindrical pump shell is fixedly communicated with the top end of the water outlet chamber, and the top end of the cylindrical pump shell is fixedly connected with a first top cover; the motor is arranged in the cylindrical pump shell, a backflow water chamber communicated with the water outlet chamber is arranged between the cylindrical pump shell and the cylindrical pump shell, the bottom end of the motor is fixed to the top end of the water inlet chamber, the top end of the motor is fixed to the bottom end of the first top cover, a heat dissipation water chamber is arranged in the motor, a first communication hole for communicating the water inlet chamber with the heat dissipation water chamber is formed in the bottom end of the motor, and a second communication for communicating the heat dissipation water chamber with the backflow water chamber is formed in the top end of; and the impeller is arranged in the water inlet chamber, and the impeller and the motor share one driving rotating shaft. The pipeline pump has the advantages of long service life, low noise, simple structure and low cost.
Description
Technical Field
The invention relates to the technical field of pipeline pumps, in particular to a silent submersible pipeline pump.
Background
The pipeline pump is the important equipment that realizes the fluid pressure boost in the pipeline, and for the life of the motor in the extension pipeline pump, its inside can be equipped with water-cooling and fan auxiliary air-cooling, carries out cooling to the stator and the rotor of motor to make the motor can long-time operation. However, the requirement of cooling of the internal cooling water on water quality is high, and the cooling water with impurities enters the space between the stator and the rotor, so that the impurities are easily accumulated, a cooling channel is blocked, the motor is abraded, and the service life of the motor is shortened; meanwhile, when the cooling is assisted through the fan, the rotation of the cooling fan can generate large noise, so that the noise pollution is improved, the comfort level of workers is reduced, and the silent shielding pump is high in manufacturing cost.
Therefore, how to provide a silent submersible pipeline pump with long service life, low noise and low cost is a problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a silent submersible pipeline pump which is long in service life, low in noise and low in cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a silent submersible tubing pump comprising:
the water inlet chamber and the water outlet chamber are independent, a water inlet and a water outlet are respectively arranged on the outer wall of the base shell, the water inlet is communicated with the water inlet chamber, and the water outlet is communicated with the water outlet chamber;
the bottom end of the cylindrical pump shell is fixedly connected and communicated with the top end of the water outlet chamber, and the top end of the cylindrical pump shell is fixedly connected with a first top cover;
the motor is arranged in the cylindrical pump shell, a backflow water chamber communicated with the water outlet chamber is arranged between the motor and the cylindrical pump shell, the bottom end of the motor is fixedly connected with the top end of the water inlet chamber, the top end of the motor is fixedly connected with the bottom end of the first top cover, a heat dissipation water chamber is arranged in the motor, a first communication hole is formed in the bottom end of the motor, the water inlet chamber is communicated with the heat dissipation water chamber through the first communication hole, a second communication hole is formed in the top of the motor, and the heat dissipation water chamber is communicated with the backflow water chamber through the second communication hole;
the impeller is arranged in the water inlet chamber, and the impeller and the motor share one driving rotating shaft.
According to the technical scheme, compared with the prior art, the invention discloses a silent submersible pipeline pump, wherein water enters a water inlet chamber through a water inlet and enters a heat dissipation water chamber through a first communication hole to cool a stator and a rotor in a motor, and then the water in the heat dissipation water chamber enters a reflux water chamber and a water outlet chamber through a second communication hole and then flows out through a water outlet. This tubing pump overflows the heat dissipation through water and has realized the motor cooling, and cooling efficiency is high, need not the fan and carries out forced air cooling auxiliary cooling, has reduced the noise by a wide margin, has solved simultaneously among the prior art when forming inside water-cooling channel through the clearance between motor stator and the rotor and cools off, and the water that has impurity flows into cooling channel and easily blocks up the effect that the passageway can not play the cooling, and the motor internals that wears and teares in addition reduces motor life's problem. Therefore, the pipeline pump has the advantages of long service life, low noise, simple structure and low cost.
Further, the motor includes:
the bottom end of the cylindrical motor outer shell is fixedly connected with a first bottom cover, the first bottom cover is fixedly connected with the top end of the water inlet chamber, the first bottom cover is provided with the first communication hole, the top end of the cylindrical motor outer shell is fixedly connected with a second top cover, the second top cover is fixedly connected with the first top cover, and the top of the wall of the cylindrical motor outer shell is provided with the second communication hole;
the cylindrical motor inner shell is sleeved inside the cylindrical motor outer shell, the heat dissipation water chamber is arranged between the cylindrical motor inner shell and the cylindrical motor outer shell, the bottom end and the top end of the cylindrical motor inner shell are fixedly connected with the first bottom cover and the second top cover respectively, a stator is fixed on the inner wall of the cylindrical motor inner shell, and a coil on the stator adopts a water-proof line of a water injection or oil injection type, so that the service life of the cylindrical motor inner shell is prolonged;
the drive pivot, drive pivot one end is rotated and is connected second top cap bottom, and the other end is worn to establish first bottom stretch into to the intake chamber, and with the diapire of intake chamber rotates and is connected, the drive pivot is close to the position cover of its one end inherent rotor, the drive pivot is close to the position cover of its other end inherent the impeller.
Adopt the beneficial effect that above-mentioned technical scheme produced to be equipped with the heat dissipation water chamber between tube-shape motor shell body and the tube-shape, can cool off stator and rotor in the motor to the simple structure of this motor, it is with low costs.
Furthermore, a first sliding bearing is fixed at the bottom end of the second top cover, a second sliding bearing is fixed on the bottom wall of the water inlet chamber, one end of the driving rotating shaft is sleeved on the inner ring of the first sliding bearing, and the other end of the driving rotating shaft is sleeved on the inner ring of the second sliding bearing.
The beneficial effect that adopts above-mentioned technical scheme to produce is that, the vibration and the noise that produce are saved for a short time in the slide bearing use, and longer for antifriction bearing life moreover.
Furthermore, a second bottom cover is fixed at a position close to the first bottom cover in the cylindrical motor inner shell, and a thrust bearing is fixed on a position sleeve between the first bottom cover and the second bottom cover on the driving rotating shaft.
The thrust bearing has the beneficial effects that the thrust bearing can limit the radial displacement of the driving rotating shaft, and the stable operation of the driving rotating shaft is ensured.
Furthermore, a third sliding bearing is fixed at the top end of the second bottom cover, and the driving rotating shaft penetrates through the third sliding bearing.
Furthermore, the impellers are multiple and stacked in the water inlet chamber, and the two adjacent impellers are fixedly connected through a connecting bolt.
The beneficial effect that adopts above-mentioned technical scheme to produce is, can be according to actual need, increase or reduce the number of impeller.
Furthermore, a mechanical seal is arranged on the position, between the first bottom cover and the impeller, of the driving rotating shaft.
Adopt the beneficial effect that above-mentioned technical scheme produced to be, avoid the water that contains impurity to enter into the inside motor internals of casing and wearing and tearing motor inside parts in the tube-shape motor through first bottom, reduce motor life.
Furthermore, a plurality of lifting lugs are arranged at the top end of the first top cover.
The beneficial effect that adopts above-mentioned technical scheme to produce is, the removal of the pipeline of being convenient for.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a silent submersible pipeline pump provided by the invention.
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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention discloses a silent submersible pipeline pump, including:
the water inlet device comprises a base shell 1, wherein an independent water inlet chamber 101 and an independent water outlet chamber 102 are arranged inside the base shell 1, a water inlet 103 and a water outlet 104 are respectively arranged on the outer wall of the base shell 1, the water inlet 103 is communicated with the water inlet chamber 101, and the water outlet 104 is communicated with the water outlet chamber 102;
the bottom end of the cylindrical pump shell 2 is fixedly connected and communicated with the top end of the water outlet chamber 102, and the top end of the cylindrical pump shell 2 is fixedly connected with a first top cover 3;
the motor 4 is arranged in the cylindrical pump shell 2, a backflow water chamber 5 communicated with the water outlet chamber 102 is arranged between the motor 4 and the cylindrical pump shell 2, the bottom end of the motor 4 is fixedly connected with the top end of the water inlet chamber 101, the top end of the motor 4 is fixedly connected with the bottom end of the first top cover 3, a heat dissipation water chamber 6 is arranged in the motor 4, a first communication hole 401 is formed in the bottom end of the motor 4, the water inlet chamber 101 is communicated with the heat dissipation water chamber 6 through the first communication hole 401, a second communication hole 402 is formed in the top end of the motor 4, and the heat dissipation water chamber 6 is communicated with the backflow water chamber;
the impeller 7, the impeller 7 is arranged in the water inlet chamber 101, and the impeller 7 and the motor 4 share one driving rotating shaft 46.
Specifically, the motor 4 includes:
the bottom end of the cylindrical motor outer shell 41 is fixedly connected with a first bottom cover 42, the first bottom cover 42 is fixedly connected with the top end of the water inlet chamber 101, a first communication hole 401 is formed in the first bottom cover 42, the top end of the cylindrical motor outer shell 41 is fixedly connected with a second top cover 43, the second top cover 43 is fixedly connected with the first top cover 3, and a second communication hole 402 is formed in the top of the wall of the cylindrical motor outer shell 41;
the cylindrical motor inner shell 44 is sleeved inside the cylindrical motor outer shell 41, a heat dissipation water chamber 6 is arranged between the cylindrical motor inner shell 44 and the cylindrical motor outer shell 41, the bottom end and the top end of the cylindrical motor inner shell 44 are fixedly connected with the first bottom cover 42 and the second top cover 43 respectively, and a stator 45 is fixed on the inner wall of the cylindrical motor inner shell 44;
and one end of the driving rotating shaft 46 is rotatably connected to the bottom end of the second top cover 43, the other end of the driving rotating shaft 46 penetrates through the first bottom cover 42 and extends into the water inlet chamber 101, the driving rotating shaft is rotatably connected with the bottom wall of the water inlet chamber 101, the position of the driving rotating shaft 46 close to one end of the driving rotating shaft is sleeved with the inherent rotor 47, and the position of the driving rotating shaft 46 close to the other end of the driving rotating shaft is sleeved with the inherent impeller 7.
The bottom end of the second top cover 43 is fixed with a first sliding bearing 8, the bottom wall of the water inlet chamber 101 is fixed with a second sliding bearing 9, one end of the driving rotating shaft 46 is sleeved and fixed on the inner ring of the first sliding bearing 8, and the other end is sleeved and fixed on the inner ring of the second sliding bearing 9.
The second bottom cover 10 is fixed in the inner housing 44 of the cylindrical motor near the first bottom cover 42, and the thrust bearing 11 is fixed on the driving shaft 46 between the first bottom cover 42 and the second bottom cover 10.
The top end of the second bottom cover 10 is fixed with a third sliding bearing 12, and the driving shaft 46 is disposed through the third sliding bearing 12.
The impellers 7 are stacked in the water inlet chamber 101, and two adjacent impellers 7 are fixedly connected through a connecting bolt 13.
The mechanical seal 14 is arranged on the driving rotating shaft 46 at a position between the first bottom cover 42 and the impeller 7.
The top end of the first top cover 3 is provided with a plurality of lifting lugs 15.
According to the pipeline pump, the water inlet and the water outlet are connected to the water delivery pipe, water enters the water inlet chamber through the water inlet and enters the heat dissipation water chamber through the first communicating hole to cool the stator and the rotor in the motor, and then the water in the heat dissipation water chamber enters the water return chamber and the water outlet chamber through the second communicating hole and flows out through the water outlet. This tubing pump overflows the heat dissipation through water and has realized the motor cooling, and cooling efficiency is high, need not the fan and carries out forced air cooling auxiliary cooling, has reduced the noise by a wide margin, has solved simultaneously among the prior art when forming inside water-cooling channel through the clearance between motor stator and the rotor and cools off, and the water that has impurity flows into cooling channel and easily blocks up the effect that the passageway can not play the cooling, and the motor internals that wears and teares in addition reduces motor life's problem. Therefore, the pipeline pump has the advantages of long service life, low noise, simple structure and low cost.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A silent submersible tubing pump, comprising:
the water inlet device comprises a base shell (1), wherein an independent water inlet chamber (101) and an independent water outlet chamber (102) are arranged inside the base shell (1), a water inlet (103) and a water outlet (104) are respectively arranged on the outer wall of the base shell (1), the water inlet (103) is communicated with the water inlet chamber (101), and the water outlet (104) is communicated with the water outlet chamber (102);
the bottom end of the cylindrical pump shell (2) is fixedly connected and communicated with the top end of the water outlet chamber (102), and the top end of the cylindrical pump shell (2) is fixedly connected with a first top cover (3);
the motor (4) is arranged in the cylindrical pump shell (2), a backflow water chamber (5) communicated with the water outlet chamber (102) is arranged between the motor (4) and the cylindrical pump shell, the bottom end of the motor (4) is fixedly connected with the top end of the water inlet chamber (101), the top end of the motor (4) is fixedly connected with the bottom end of the first top cover (3), a heat dissipation water chamber (6) is arranged in the motor (4), a first communication hole (401) is formed in the bottom end of the motor (4), the water inlet chamber (101) is communicated with the heat dissipation water chamber (6) through the first communication hole (401), a second communication hole (402) is formed in the top of the motor (4), and the heat dissipation water chamber (6) is communicated with the backflow water chamber (5) through the second communication hole (402);
the impeller (7), impeller (7) set up in intake chamber (101), and impeller (7) and motor (4) share one drive pivot (46).
2. A silent submersible pipe pump according to claim 1, characterized in that the electric motor (4) comprises:
a first bottom cover (42) is fixedly connected to the bottom end of the cylindrical motor outer shell (41), the first bottom cover (42) is fixedly connected with the top end of the water inlet chamber (101), the first bottom cover (42) is provided with the first communicating hole (401), the top end of the cylindrical motor outer shell (41) is fixedly connected with a second top cover (43), the second top cover (43) is fixedly connected with the first top cover (3), and the top of the wall of the cylindrical motor outer shell (41) is provided with the second communicating hole (402);
the cylindrical motor inner shell (44) is sleeved inside the cylindrical motor outer shell (41), the heat dissipation water chamber (6) is arranged between the cylindrical motor inner shell (44) and the cylindrical motor outer shell (41), the bottom end and the top end of the cylindrical motor inner shell (44) are fixedly connected with the first bottom cover (42) and the second top cover (43) respectively, and a stator (45) is fixed on the inner wall of the cylindrical motor inner shell (44);
drive pivot (46), drive pivot (46) one end is rotated and is connected second top cap (43) bottom, and the other end is worn to establish first bottom (42) stretch into to intake chamber (101), and with the diapire of intake chamber (101) rotates and is connected, drive pivot (46) are close to the inherent rotor of position cover (47) of its one end, it is inherent that the position cover that drive pivot (46) are close to its other end impeller (7).
3. The silent submersible pipeline pump according to claim 2, wherein a first sliding bearing (8) is fixed at the bottom end of the second top cover (43), a second sliding bearing (9) is fixed on the bottom wall of the water inlet chamber (101), one end of the driving rotating shaft (46) is fixedly sleeved on the inner ring of the first sliding bearing (8), and the other end of the driving rotating shaft is fixedly sleeved on the inner ring of the second sliding bearing (9).
4. A silent submersible pipe pump according to claim 2, wherein a second bottom cover (10) is fixed inside the cylindrical motor inner housing (44) at a position close to the first bottom cover (42), and a thrust bearing (11) is fixed on the driving shaft (46) at a position between the first bottom cover (42) and the second bottom cover (10).
5. The silent submersible pipeline pump according to claim 4, wherein a third sliding bearing (12) is fixed at the top end of the second bottom cover (10), and the driving rotating shaft (46) is arranged through the third sliding bearing (12).
6. A silent submersible pipe pump according to claim 1, wherein the impellers (7) are plural and stacked in the water inlet chamber (101), and adjacent two impellers (7) are fixedly connected by a connecting bolt (13).
7. A silent submersible pipe pump according to claim 2, characterized in that the drive shaft (46) is provided with a mechanical seal (14) at a location between the first bottom cover (42) and the impeller (7).
8. A silent submersible pump according to claim 1, characterized in that the first cover (3) is provided with a plurality of lifting lugs (15) at its top end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432052.6A CN113027780A (en) | 2021-04-21 | 2021-04-21 | Silent submersible pipeline pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432052.6A CN113027780A (en) | 2021-04-21 | 2021-04-21 | Silent submersible pipeline pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113027780A true CN113027780A (en) | 2021-06-25 |
Family
ID=76457951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110432052.6A Pending CN113027780A (en) | 2021-04-21 | 2021-04-21 | Silent submersible pipeline pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113027780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645874A (en) * | 2022-02-15 | 2022-06-21 | 安徽新沪屏蔽泵有限责任公司 | Pump assembly |
-
2021
- 2021-04-21 CN CN202110432052.6A patent/CN113027780A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645874A (en) * | 2022-02-15 | 2022-06-21 | 安徽新沪屏蔽泵有限责任公司 | Pump assembly |
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