CN109026733A - A kind of vertical low cavitation high security magnetic drive pump - Google Patents
A kind of vertical low cavitation high security magnetic drive pump Download PDFInfo
- Publication number
- CN109026733A CN109026733A CN201810940598.0A CN201810940598A CN109026733A CN 109026733 A CN109026733 A CN 109026733A CN 201810940598 A CN201810940598 A CN 201810940598A CN 109026733 A CN109026733 A CN 109026733A
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- Prior art keywords
- sleeve
- magnet rotor
- pump
- separation sleeve
- motor
- 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.)
- Pending
Links
- 238000000926 separation method Methods 0.000 claims abstract description 36
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 238000013016 damping Methods 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
- 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
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
-
- 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
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- 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
- F04D29/18—Rotors
- F04D29/185—Rotors consisting of a plurality of wheels
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal 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
- F04D29/66—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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to magnetic force pump technical fields, especially a kind of vertical low cavitation high security magnetic drive pump, including motor and connection frame, it is fixedly connected between the connection frame and motor, it is connected with shaft coupling vertically in the output of the motor, the shaft coupling is located inside connection frame, the shaft coupling is connected with outer magnet rotor far from one end of motor, the outer magnet rotor internal sleeve is equipped with interior magnet rotor, separation sleeve is installed between the interior magnet rotor and outer magnet rotor, the separation sleeve includes level-one separation sleeve and second level separation sleeve, the second level separation sleeve is connected to the inside of level-one separation sleeve, and the interior magnet rotor internal sleeve is equipped with axle sleeve, pump shaft is fitted with inside the axle sleeve, bearing is set on the pump shaft, the bearing is fixedly mounted on inside bearing block, the bearing seat is below outer magnet rotor.The configuration of the present invention is simple, work efficiency is high, and anti-cavitation performance is strong, while having preferable safety in utilization and damping effect.
Description
Technical field
The present invention relates to magnetic force pump technical fields, more particularly to a kind of vertical low cavitation high security magnetic drive pump.
Background technique
With the rapid development of the industry such as China's oil, chemical industry, the demand to centrifugal pump is higher and higher.Due to chemical plant installations
The performance requirement of chemical pump is continuously improved, and many particular applications propose very high want to the cavitation performance of pump
It asks, needs chemical pump that cavitation does not occur under very low suction pressure.On the other hand, in process industry, the medium of output is most
The features such as being corrosive, be inflammable and explosive, is volatile and toxic.Many technical process are to the high temperature resistant of process pump, corrosion-resistant and close
Sealing property has very strict requirements.Therefore, practical for production, the vapour of pump how is improved under the premise of meeting No leakage
Corrosion can become a major issue.Based on the particular/special requirement of above-mentioned use environment, have the characteristics that the magnetic drive pump of No leakage has become
For optimal selection, but existing magnetic drive pump is easy the medium of vaporization and the practical application of many low entry pressure in conveying
In, cavitation performance is difficult to meet user's requirement, limits the use scope of magnetic drive pump, this is mainly due to magnetic drive pumps itself
Design feature, the presence with the separation sleeve of the inside of magnetic drive pump and the air gap of interior magnet rotor and separation sleeve are even more further to drop
Low anti-cavitation performance, so that net positive suction head increases, cavitation not only influences the working characteristics and service life of pump itself, but also
Influence the reliability and advance of whole device equipment.
Summary of the invention
The purpose of the present invention is to solve the disadvantages that cavitation-resistance difference exists in the prior art, and the one kind proposed is vertical
Low cavitation high security magnetic drive pump.
To achieve the goals above, present invention employs following technical solutions:
Design a kind of vertical low cavitation high security magnetic drive pump, including motor and connection frame, the connection frame and motor it
Between be fixedly connected, shaft coupling is connected in the output of the motor vertically, the shaft coupling is located inside connection frame, the shaft coupling
Device is connected with outer magnet rotor far from one end of motor, and the outer magnet rotor internal sleeve is equipped with interior magnet rotor, the interior magnet rotor with
Separation sleeve is installed between outer magnet rotor, the separation sleeve includes level-one separation sleeve and second level separation sleeve, the second level separation sleeve
It is connected to the inside of level-one separation sleeve, and the interior magnet rotor internal sleeve is equipped with axle sleeve, is fitted with pump shaft inside the axle sleeve, institute
State and be set with bearing on pump shaft, the bearing is fixedly mounted on inside bearing block, the bearing seat below outer magnet rotor,
The bearing block bottom is connected with pump cover, and the inside of the pump cover is equipped with thrust ring, and the thrust ring is set on the outside of pump shaft,
The bottom of the pump cover is connected with the pump housing, and the one end of the pump shaft far from axle sleeve extends to pump body, and end through pump cover
It is successively arranged with sencond stage impeller and one stage impeller, has been connected through a screw thread nut on the pump shaft of the one stage impeller bottom, it is described
Nut offsets with one stage impeller surface, and inner casing, the outer magnet rotor and axis are fixedly connected between the connection frame and pump cover
It holds seat to be respectively positioned on the inside of inner casing, the outside of the connection frame, inner casing and the pump housing is arranged with shell jointly, and the bottom of the shell is set
There is damping device.
Preferably, the damping device includes sleeve, and the sleeve bottom is along the circumferential direction equidistant to be connected with more branch
Foot, the inboard, upright of the sleeve are equipped with damper cylinder, between the damper cylinder and sleeve from down toward lower difference along the circumferential direction etc.
Distance is connected with multiple second springs and the first spring, is symmetrical arranged between the second spring and the first spring, subtracts described
The top horizontal of shake cylinder is connected with support plate, and the shell vertical is mounted at the top of support plate.
Preferably, the outside of the shell is equipped with pressure gauge, is connected inside the pressure gauge and separation sleeve.
Preferably, the motor and connection frame are structure as a whole.
The vertical low cavitation high security magnetic drive pump of one kind proposed by the present invention, beneficial effect are: by inner casing and shell,
So as to improve the safety in utilization of this product, by level-one separation sleeve and second level separation sleeve, turn so as to increase outer magnetic
The sub anti-cavitation performance between interior magnet rotor, the effective service life for increasing this product, passes through one stage impeller and second level leaf
Wheel, to improve the working efficiency of this product.The configuration of the present invention is simple, work efficiency is high, and anti-cavitation performance is strong, has simultaneously
Preferable safety in utilization and damping effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the vertical low cavitation high security magnetic drive pump of one kind proposed by the present invention；
Fig. 2 is the damping device structural schematic diagram of the vertical low cavitation high security magnetic drive pump of one kind proposed by the present invention；
Fig. 3 is enlarged structure schematic diagram at A in Fig. 1.
In figure: motor 1, connection frame 2, outer magnet rotor 3, shell 4, pump shaft 5, pump cover 6, one stage impeller 7, nut 8, stabilizer blade 9,
First spring 10, second spring 11, damper cylinder 12, support plate 13, the pump housing 14, bearing block 15, inner casing 16, shaft coupling 17, sleeve
18, separation sleeve 19, thrust ring 20, bearing 21, interior magnet rotor 22, axle sleeve 23, pressure gauge 24, sencond stage impeller 25.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-3, a kind of vertical low cavitation high security magnetic drive pump, including motor 1 and connection frame 2, connection frame 2 and electricity
It is fixedly connected between machine 1, motor 1 and connection frame 2 are structure as a whole, and are connected with shaft coupling 17, shaft coupling in the output of motor 1 vertically
Device 17 is located inside connection frame 2, and shaft coupling 17 is connected with outer magnet rotor 3 far from one end of motor 1, is arranged inside outer magnet rotor 3
Have interior magnet rotor 22, be installed with separation sleeve 19 between interior magnet rotor 22 and outer magnet rotor 3, separation sleeve 19 include level-one separation sleeve and
Second level separation sleeve, second level separation sleeve is connected to the inside of level-one separation sleeve, and 22 internal sleeve of interior magnet rotor is equipped with axle sleeve 23, axle sleeve
It is fitted with pump shaft 5 inside 23, bearing 21 is set on pump shaft 5, bearing 21 is fixedly mounted on inside bearing block 15, and bearing block 15
In outer 3 lower section of magnet rotor, it is connected with pump cover 6 in 15 bottom of bearing block, the inside of pump cover 6 is equipped with thrust ring 20, thrust ring 20
It is set in 5 outside of pump shaft, the bottom of pump cover 6 is connected with the pump housing 14, and the one end of pump shaft 5 far from axle sleeve 23 is extended to through pump cover 6
Inside the pump housing 14, and end is successively arranged with sencond stage impeller 25 and one stage impeller 7, passes through spiral shell on the pump shaft 5 of 7 bottom of one stage impeller
Line is connected with nut 8, and nut 8 offsets with 7 surface of one stage impeller, and inner casing 16 is fixedly connected between connection frame 2 and pump cover 6,
Outer magnet rotor 3 and bearing block 15 are respectively positioned on 16 inside of inner casing, and the outside of connection frame 2, inner casing 16 and the pump housing 14 is arranged with outer jointly
Shell 4, the outside of shell 4 are equipped with pressure gauge 24, are connected inside pressure gauge 24 and separation sleeve 19, and the bottom of shell 4 is equipped with damping
Device；Motor 1 drives outer magnet rotor 3 to rotate by shaft coupling 17, and magnetic field energy penetrates the air gap and separation sleeve 19, to drive
The interior magnet rotor 22 being connected with one stage impeller 7 and sencond stage impeller 25 makees synchronous rotary, realizes the contactless synchronous transmitting of power, will
The movable sealing structure for being easy leakage is converted into the static seal structure of zero leakage, due to pump shaft 5, interior magnet rotor 22 by the pump housing 14 and every
Completely enclosed from set 19, to thoroughly solve the problems, such as " run, drip, leak ", separation sleeve 19 is isolated by level-one separation sleeve and second level
Set composition, so that the anti-cavitation performance between outer magnet rotor 3 and interior magnet rotor 22 is increased, the effective use for increasing this product
Service life, by one stage impeller 7 and sencond stage impeller 25, to improve the working efficiency of this product, by inner casing 16 and shell 4,
So as to improve the safety in utilization of this product.
Damping device includes sleeve 18, and 18 bottom of sleeve is along the circumferential direction equidistant to be connected with more stabilizer blades 9, sleeve 18
Inboard, upright be equipped with damper cylinder 12, between damper cylinder 12 and sleeve 18 from down toward it is lower respectively it is along the circumferential direction equidistant be connected with it is more
A second spring 11 and the first spring 10 are symmetrical arranged, at the top of damper cylinder 12 between second spring 11 and the first spring 10
Horizontal connection has support plate 13, and shell 4 is vertically mounted on 13 top of support plate；By second spring 11 and the first spring 10, from
And comprehensive damping work can be carried out to damper cylinder 12, damping, buffering effectively is carried out to this product.
Embodiment: motor 1 drives outer magnet rotor 3 to rotate by shaft coupling 17, and magnetic field energy penetrates the air gap and isolation
Set 19 realizes that the nothing of power connects so that the interior magnet rotor 22 being connected with one stage impeller 7 and sencond stage impeller 25 be driven to make synchronous rotary
The synchronous transmitting of touching, converts the movable sealing structure of easy leakage to the static seal structure of zero leakage, due to pump shaft 5, interior magnet rotor
22 are completely enclosed by the pump housing 14 and separation sleeve 19, to thoroughly solve the problems, such as " run, drip, leak ", separation sleeve 19 by level-one every
From set and second level separation sleeve composition, to increase the anti-cavitation performance between outer magnet rotor 3 and interior magnet rotor 22.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of vertical low cavitation high security magnetic drive pump, including motor (1) and connection frame (2), the connection frame (2) and motor
(1) it is fixedly connected between, is connected with vertically shaft coupling (17) in the output of the motor (1), the shaft coupling (17), which is located at, to be connected
It is internal to connect frame (2), which is characterized in that the shaft coupling (17) is connected with outer magnet rotor (3) far from the one end of motor (1), described
Outer magnet rotor (3) internal sleeve is equipped with interior magnet rotor (22), is installed with and is isolated between the interior magnet rotor (22) and outer magnet rotor (3)
It covers (19), the separation sleeve (19) includes level-one separation sleeve and second level separation sleeve, and the second level separation sleeve is connected to level-one isolation
The inside of set, and interior magnet rotor (22) internal sleeve is equipped with axle sleeve (23), is fitted with pump shaft (5) inside the axle sleeve (23),
It is set with bearing (21) on the pump shaft (5), the bearing (21) is fixedly mounted on bearing block (15) inside, the bearing block
(15) it is located at below outer magnet rotor (3), is connected with pump cover (6) in the bearing block (15) bottom, the inside peace of the pump cover (6)
Equipped with thrust ring (20), the thrust ring (20) is set on the outside of pump shaft (5), and the bottom of the pump cover (6) is connected with the pump housing
(14), the one end of the pump shaft (5) far from axle sleeve (23) extends to the pump housing (14) inside through pump cover (6), and end successively covers
Equipped with sencond stage impeller (25) and one stage impeller (7), spiral shell has been connected through a screw thread on the pump shaft (5) of one stage impeller (7) bottom
Female (8), the nut (8) offset with one stage impeller (7) surface, are fixedly connected between the connection frame (2) and pump cover (6)
Inner casing (16), the outer magnet rotor (3) and bearing block (15) are respectively positioned on the inside of inner casing (16), the connection frame (2), inner casing (16)
It is arranged with jointly shell (4) with the outside of the pump housing (14), the bottom of the shell (4) is equipped with damping device.
2. the vertical low cavitation high security magnetic drive pump of one kind according to claim 1, which is characterized in that the damping device
Including sleeve (18), sleeve (18) bottom is along the circumferential direction equidistant to be connected with more stabilizer blades (9), the sleeve (18)
Inboard, upright is equipped with damper cylinder (12), from along the circumferential direction equidistant down toward lower difference between the damper cylinder (12) and sleeve (18)
From multiple second springs (11) and the first spring (10) are connected with, between the second spring (11) and the first spring (10) symmetrically
Setting, is connected with support plate (13), the shell (4) is vertically mounted on support plate in the top horizontal of the damper cylinder (12)
(13) top.
3. the vertical low cavitation high security magnetic drive pump of one kind according to claim 3, which is characterized in that the shell (4)
Outside be equipped with pressure gauge (24), the pressure gauge (24) and separation sleeve (19) inside are connected.
4. the vertical low cavitation high security magnetic drive pump of one kind according to claim 1, which is characterized in that the motor (1)
It is structure as a whole with connection frame (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940598.0A CN109026733A (en) | 2018-08-17 | 2018-08-17 | A kind of vertical low cavitation high security magnetic drive pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940598.0A CN109026733A (en) | 2018-08-17 | 2018-08-17 | A kind of vertical low cavitation high security magnetic drive pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026733A true CN109026733A (en) | 2018-12-18 |
Family
ID=64630883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810940598.0A Pending CN109026733A (en) | 2018-08-17 | 2018-08-17 | A kind of vertical low cavitation high security magnetic drive pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026733A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2656680Y (en) * | 2003-11-11 | 2004-11-17 | 吴波 | Leakproof vertical self-priming pump |
| CN202250896U (en) * | 2011-08-09 | 2012-05-30 | 浙江腾宇泵阀设备有限公司 | High-pressure reverse circulation magnetic pump |
| CN203297106U (en) * | 2013-05-14 | 2013-11-20 | 绍兴蓝德磁力科技有限公司 | Magnetic transmission vertical type pipeline pump |
| CN104047867A (en) * | 2014-06-25 | 2014-09-17 | 江苏大学 | Vertical pipeline multi-stage magnetic driving pump |
| DE102013004682A1 (en) * | 2013-03-19 | 2015-01-08 | Katharina Diener | High and low pressure Pitot tube centrifugal pump hermetically sealed with a special universal permanent magnet clutch from the Pitot tube. Type Rotary Case Jet pump (also called brandel Pitot tube pump) Short name: ITTRC jet pump |
| CN206708032U (en) * | 2017-05-05 | 2017-12-05 | 浙江巨龙泵业有限公司 | A kind of dual-seal type magnetic centrifugal pump |
-
2018
- 2018-08-17 CN CN201810940598.0A patent/CN109026733A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2656680Y (en) * | 2003-11-11 | 2004-11-17 | 吴波 | Leakproof vertical self-priming pump |
| CN202250896U (en) * | 2011-08-09 | 2012-05-30 | 浙江腾宇泵阀设备有限公司 | High-pressure reverse circulation magnetic pump |
| DE102013004682A1 (en) * | 2013-03-19 | 2015-01-08 | Katharina Diener | High and low pressure Pitot tube centrifugal pump hermetically sealed with a special universal permanent magnet clutch from the Pitot tube. Type Rotary Case Jet pump (also called brandel Pitot tube pump) Short name: ITTRC jet pump |
| CN203297106U (en) * | 2013-05-14 | 2013-11-20 | 绍兴蓝德磁力科技有限公司 | Magnetic transmission vertical type pipeline pump |
| CN104047867A (en) * | 2014-06-25 | 2014-09-17 | 江苏大学 | Vertical pipeline multi-stage magnetic driving pump |
| CN206708032U (en) * | 2017-05-05 | 2017-12-05 | 浙江巨龙泵业有限公司 | A kind of dual-seal type magnetic centrifugal pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20240315 |