CN109296533A - Water-ring vacuum pump - Google Patents
Water-ring vacuum pump Download PDFInfo
- Publication number
- CN109296533A CN109296533A CN201811476563.2A CN201811476563A CN109296533A CN 109296533 A CN109296533 A CN 109296533A CN 201811476563 A CN201811476563 A CN 201811476563A CN 109296533 A CN109296533 A CN 109296533A
- Authority
- CN
- China
- Prior art keywords
- water
- connector sleeve
- ring
- disk
- water ring
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 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
- 238000007789 sealing Methods 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007738 vacuum evaporation 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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/005—Details concerning the admission or discharge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of water-ring vacuum pumps.It solves the problems, such as that existing water-ring vacuum pump power is single.Its water ring suction and discharge disk includes shell disk, connecting shaft, impeller, air intake duct and escape pipe, cavity is equipped in shell disk, impeller be set in connecting shaft and eccentric setting in the cavity, the rotation of connecting shaft both ends is located at shell disk both ends and extends to outside cavity, and the two sides of shell disk are respectively set in air intake duct and escape pipe；Water ring suction and discharge disk, which is sequentially connected, constitutes water ring air-breathing group, is connected between the connecting shaft of adjacent water ring suction and discharge disk by connector；The connecting shaft of water ring air-breathing group one end is connected by shaft coupling with the output shaft of driving motor, is fixedly installed end cap on the water ring air-breathing group other end.The workpiece that the present invention extracts gas is sequentially connected by several water ring suction and discharge disks to be constituted, and the water ring vacuum pump for selecting polytypic is avoided.It is designed rationally, easy to use.
Description
Technical field
The present invention relates to the rotary piston type pumps with fluid ring or the like for being specially adapted for elastic fluid, especially
A kind of water-ring vacuum pump.
Background technique
It is known that water ring pump is initially used as self-priming water pump, be then gradually available for petroleum, chemical industry, machinery, mine, light industry,
Many industrial departments such as medicine and food.In industrial many technical process, such as vacuum filter, vacuum water diversion, vacuum
Feeding, vacuum evaporation, vacuum concentration, vacuum conditioning and vacuum outgas etc., water ring pump is widely used.Due to vacuum application
Technology is developed by leaps and bounds, and water ring pump is valued by the people always in terms of black vacuum acquisition.
In chemical and medicine industry field, water-ring vacuum pump currently on the market is constant power size, therefore according to production
The difference of situation needs spare various types of vacuum pumps, therefore production cost is larger, and the vacuum pump of polytypic is idle to be also resulted in
The wastes of resources costs.
Summary of the invention
It is an object of the invention to overcome the shortcomings of that existing water-ring vacuum pump power is single, and provide a kind of structure design
Rationally, water-ring vacuum pump easy to use.
Technical solution used by the present invention solves the above problems is: a kind of water-ring vacuum pump comprising driving motor,
Shaft coupling, it is characterised in that: it further includes several water ring suction and discharge disks and end cap, and the water ring suction and discharge disk includes shell
Body disc, connecting shaft, impeller, air intake duct and escape pipe are provided with the rounded cavity in section in the shell disk, described
Impeller is fixed be set in connecting shaft and eccentric setting in the cavity, the connecting shaft both ends are rotatably arranged on shell disk
Both ends simultaneously extend to outside cavity, and the two sides corresponding position of shell disk is respectively set in air intake duct and escape pipe；The water ring is inhaled
Exhaust disk, which is sequentially connected, constitutes water ring air-breathing group, is connected between the connecting shaft of adjacent water ring suction and discharge disk by connector；
The connecting shaft of described water ring air-breathing group adjacent driving motor one end is connected by shaft coupling with the output shaft of driving motor, water
Ring air-breathing group is far from being fixedly installed end cap on one end of driving motor.
Further, the sealed connecting component includes the first connector sleeve, the second connector sleeve and sealing rubber ring, described
End cap, water ring suction and discharge disk both ends and shaft coupling are provided with ring flange, and the one of first connector sleeve, the second connector sleeve
End, which respectively corresponds, to be sealedly and fixedly connected on adjacent ring flange, and first connector sleeve, the second connector sleeve are far from ring flange
One end between be cooperatively connected, and the sealing rubber ring is separately positioned on the first connector sleeve and the second connector sleeve far from ring flange
One end between；Adjacent ring flange is connected and fixed by bolt part.
Further, be provided with pressure gauge on the side outer wall of first connector sleeve, and the pressure gauge with
The inner cavity of first connector sleeve and the second connector sleeve is connected.
Further, it is provided with inspection hole on side outer wall of first connector sleeve far from pressure gauge, described
Inspection hole on releasable connection have plug.
Further, the connector is a connector sleeve, and polygon connecting hole is offered on one end of the connector sleeve,
The wherein end of a connecting shaft of adjacent water ring suction and discharge disk is fixedly connected with the connector sleeve, adjacent water ring suction and discharge disk
The end of another connecting shaft is equipped with polygon connection-peg, the connecting hole releasable connection of the connection-peg and connector sleeve.
Further, the driving motor and water ring suction and discharge disk are fixed on the base by bolt part.
The workpiece that gas is extracted in water-ring vacuum pump of the invention is sequentially connected structure by several water ring suction and discharge disks
At, therefore the water ring suction and discharge disk of respective numbers can be chosen according to actual needs when in use, the water ring for avoiding polytypic is true
The spare and idle waste of sky pump.Each component is attached by sealed connecting component simultaneously, water ring suction and discharge are effectively ensured
The cavity leakproofness of disk.Compared with prior art, structure of the invention design is rationally, easy to use.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of embodiment of the invention；
Fig. 2 is the structural schematic diagram of water ring suction and discharge disk of the invention；
Fig. 3 is sealed connecting component structural schematic diagram of the invention；
Fig. 4 is the enlarged cross-sectional view of the line A-A along Fig. 3.
Marked in the figure: 1. driving motors, 2. shaft couplings, 3. water ring suction and discharge disks, 31. shell disks, 32. connecting shafts, 33. leaves
Wheel, 34. air intake ducts, 35. escape pipes, 4. end caps, 5. sealed connecting components, 51. first connector sleeves, 511. inspection holes, 52. second connect
Female connector, 53. sealing rubber rings, 54. ring flanges, 6. pressure gauges, 7. pedestals, 8. connectors (connector sleeve), 81. connecting holes, 9. grafting
Head, 10. plugs.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
As shown in Figure 1, a kind of water-ring vacuum pump of the present embodiment, including driving motor 1, shaft coupling 2, several water ring suctions
Gas disk 3 and end cap 4.
As shown in Fig. 2, each water ring suction and discharge disk 3 include shell disk 31, connecting shaft 32, impeller 33, air intake duct 34 with
And escape pipe 35 is provided with the rounded cavity in section in Fig. 2 in shell disk 31, impeller 33 nonrotationally fixes the company of being set in
In spindle 42 and eccentric setting in the cavity, 32 both ends of connecting shaft are rotatably supported in the both ends of shell disk 31 and extend to cavity
Outside, the two sides corresponding position of shell disk 41 is respectively set in air intake duct 34 and escape pipe 35.
As shown in Figure 1, water ring suction and discharge disk 3, which is sequentially connected, constitutes water ring air-breathing group.With reference to Fig. 3, adjacent water ring suction
The connecting shaft 32 of gas disk 3 is connected by connector 8.In Fig. 1, Fig. 2, in 1 one end of water ring air-breathing group adjacent driving motor
Connecting shaft 32 is connected by shaft coupling 2 with the output shaft of driving motor 1.On the one end of water ring air-breathing group far from driving motor 1
It is fixedly installed end cap 4.Driving motor 1 is drivingly connected axis 32 by shaft coupling 2 and rotates, so that 32 impeller 33 of connecting shaft is revolved
Turn, forms vacuum in the cavity of shell disk 31, pass through 35 outlet of 34 air-breathing of air intake duct and escape pipe.
For the ease of assembling and using, as shown in Figure 1, driving motor 1 and water ring suction and discharge disk 3 are solid by bolt part
It is scheduled on pedestal 7.
It should be noted that the quantity of water ring suction and discharge disk 3 can be chosen according to actual needs, in the present embodiment, water ring is inhaled
The quantity for being vented disk 3 is three.
In order to guarantee the connection sealing between each component, as shown in figure 3, end cap 4, water ring suction and discharge disk 3 and shaft coupling 2
Between pass sequentially through sealed connecting component 5 connection.
It should be noted that as shown in figure 3, in the present embodiment, sealed connecting component 5 includes the first connector sleeve 51, second
Connector sleeve 52 and sealing rubber ring 53.With reference to Fig. 1, Fig. 2, Fig. 3, on end cap 4,3 both ends of water ring suction and discharge disk and shaft coupling 2
Equal sealing welding is connected to ring flange 54.In Fig. 3, the first connector sleeve 51, the second connector sleeve 52 one end respectively correspond sealing welding
On adjacent ring flange 54, matched between the first connector sleeve 51, second one end of connector sleeve 52 far from ring flange 54 using seam allowance
Close connection, sealing rubber ring 53 be separately positioned on one end seam allowance of the first connector sleeve 51 and the second connector sleeve 52 far from ring flange 54 it
Between.Adjacent ring flange 54 is connected and fixed by bolt part tension, thus by the first connector sleeve 51 and the second connector sleeve 52
Chamber forms a seal chamber.
For the ease of the sealing performance between observation end cap 4, water ring suction and discharge disk 3 and shaft coupling 2, as shown in figure 3,
Pressure gauge 6, and pressure gauge 6 and the first connector sleeve 51 and the second connector sleeve 52 are provided on the side outer wall of first connector sleeve 51
Inner cavity be connected.By air-breathing or inflation into the inner cavity of the first connector sleeve 51 and the second connector sleeve 52, produce it with the external world
Angry pressure difference is simultaneously shown in pressure gauge 6, when the inner cavity of the first connector sleeve 51 and the second connector sleeve 52 and water ring suction and discharge disk 3
When generating leakage between cavity, then the air pressure that can lead to the inner cavity of the first connector sleeve 51 and the second connector sleeve 52 generates variation, then deposits
A possibility that the connecting shaft 32 and 31 junction leakproofness of shell disk of water ring suction and discharge disk 3 are destroyed, then overhauled (the
The leakproofness of the inner cavity of one connector sleeve 51 and the second connector sleeve 52 itself may also lead to air pressure change), effectively find the problem in time,
Specific aim is handled.
In order to further detect pressure gauge 6 whether effectively, as shown in figure 3, the first connector sleeve 51 far from pressure gauge 6 one
Inspection hole 511 is provided on the outer wall of side, releasable connection is sealed on inspection hole 511 plug 10.When removing plug 10, pressure
The aobvious value of table 6 changes, then illustrates that pressure gauge 6 is effective；It is on the contrary then invalid.
It should be further noted that as shown in Figure 3, Figure 4, connector 8 is a connector sleeve, in one end of the connector sleeve 8
On offer polygon connecting hole 81, the wherein end of a connecting shaft 32 of adjacent water ring suction and discharge disk and connector sleeve 8 weld, phase
Border on the river ring suction and discharge disk another connecting shaft 32 end be equipped with polygon connection-peg 9, the connection of connection-peg 9 and connector sleeve 8
81 releasable connection of hole.
The workpiece that gas is extracted in water-ring vacuum pump of the invention is sequentially connected structure by three water ring suction and discharge disks 3
At, while the quantity of its water ring suction and discharge disk can also be chosen according to actual needs, avoid the standby of the water ring vacuum pump of polytypic
With and idle waste.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can make various modifications or additions to the described embodiments or by a similar method
Substitution, content without departing from description of the invention or beyond the scope defined by this claim should belong to this
The protection scope of invention.
Claims (7)
1. a kind of water-ring vacuum pump comprising driving motor, shaft coupling, it is characterised in that: it further includes several water ring suctions
Gas disk and end cap, the water ring suction and discharge disk include shell disk, connecting shaft, impeller, air intake duct and escape pipe, described
Shell disk in be provided with the rounded cavity in section, the impeller fixation is set in connecting shaft and is eccentrically set on chamber
In vivo, the connecting shaft both ends are rotatably arranged on the both ends of shell disk and extend to outside cavity, air intake duct and escape pipe point
Not She Zhi shell disk two sides corresponding position；The water ring suction and discharge disk, which is sequentially connected, constitutes water ring air-breathing group, adjacent water
It is connected between the connecting shaft of ring suction and discharge disk by connector；The connection of described water ring air-breathing group adjacent driving motor one end
Axis is connected by shaft coupling with the output shaft of driving motor, and water ring air-breathing group on one end of driving motor far from being fixedly installed
End cap.
2. a kind of water-ring vacuum pump according to claim 1, it is characterised in that: the end cap, water ring suction and discharge disk
And sealed connecting component connection is passed sequentially through between shaft coupling.
3. a kind of water-ring vacuum pump according to claim 2, it is characterised in that: the sealed connecting component includes first
Connector sleeve, the second connector sleeve and sealing rubber ring, the end cap, water ring suction and discharge disk both ends and shaft coupling are provided with method
Blue disk, first connector sleeve, the second connector sleeve one end respectively correspond and be sealedly and fixedly connected on adjacent ring flange, institute
The first connector sleeve for stating, the second connector sleeve between one end of ring flange far from being cooperatively connected, and the sealing rubber ring is set respectively
It sets between the one end of the first connector sleeve and the second connector sleeve far from ring flange；Adjacent ring flange is connected solid by bolt part
It is fixed.
4. a kind of water-ring vacuum pump according to claim 3, it is characterised in that: in the side of first connector sleeve
Pressure gauge is provided on outer wall, and the pressure gauge is connected with the inner cavity of the first connector sleeve and the second connector sleeve.
5. a kind of water-ring vacuum pump according to claim 4, it is characterised in that: in first connector sleeve far from pressure
It is provided with inspection hole on the side outer wall of power table, releasable connection has plug on the inspection hole.
6. a kind of water-ring vacuum pump according to claim 1, it is characterised in that: the connector is a connector sleeve,
Polygon connecting hole, the wherein end of a connecting shaft of adjacent water ring suction and discharge disk and institute are offered on one end of the connector sleeve
The connector sleeve stated is fixedly connected, and the end of another connecting shaft of adjacent water ring suction and discharge disk is equipped with polygon connection-peg, described
Connection-peg and connector sleeve connecting hole releasable connection.
7. a kind of water-ring vacuum pump according to claim 1, it is characterised in that: the driving motor and water ring are inhaled
Exhaust disk is fixed on the base by bolt part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476563.2A CN109296533A (en) | 2018-12-05 | 2018-12-05 | Water-ring vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476563.2A CN109296533A (en) | 2018-12-05 | 2018-12-05 | Water-ring vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109296533A true CN109296533A (en) | 2019-02-01 |
Family
ID=65142467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811476563.2A Pending CN109296533A (en) | 2018-12-05 | 2018-12-05 | Water-ring vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296533A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292292A (en) * | 2023-05-11 | 2023-06-23 | 沈阳铱宁重工机械制造有限公司 | Water ring type vacuum pump |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB691425A (en) * | 1950-06-03 | 1953-05-13 | Otto Siemen | Improvements in or relating to two stage liquid-ring air-pumps |
| FR1235237A (en) * | 1958-10-08 | 1960-07-01 | Siemens Ag | Large Capacity Double Acting Two Stage Liquid Ring Gas Pump |
| US3228587A (en) * | 1962-10-17 | 1966-01-11 | Siemen & Hinsch Gmbh | Liquid-ring gas pumps |
| JPS52109611A (en) * | 1976-03-11 | 1977-09-14 | Kubota Ltd | Connecting method of enclosed liquid type vacuum pump |
| CN201437783U (en) * | 2009-07-30 | 2010-04-14 | 靖江市连成泵业有限公司 | Low rotational speed multilevel brimstone pump |
| CN101929479A (en) * | 2009-06-24 | 2010-12-29 | 边疆 | Method for removing pump pipe differential pressure with high adaptivity |
| CN202811403U (en) * | 2012-08-29 | 2013-03-20 | 崇左森隆林化科技有限公司 | Two-stage water ring pump |
| CN203430810U (en) * | 2013-08-23 | 2014-02-12 | 烟台沃尔姆真空技术有限公司 | Two-stage water-ring vacuum pump |
| CN203770060U (en) * | 2014-03-07 | 2014-08-13 | 胜瑞兰工业设备（苏州）有限公司 | Multi-head mass flow combined mechanical diaphragm pump |
| CN204646642U (en) * | 2015-04-16 | 2015-09-16 | 天津工程机械研究院 | The radial plunger pump pump housing |
| CN106286286A (en) * | 2016-08-25 | 2017-01-04 | 陈兆红 | Vane type parallel-connected pumps |
| CN107816341A (en) * | 2017-10-26 | 2018-03-20 | 宝鸡石油机械有限责任公司 | A kind of hydraulic-driven Modular pump pressure break sledge |
| CN207583631U (en) * | 2017-11-30 | 2018-07-06 | 浙江理工大学 | Study the mechanics experimental apparatus in centrifugal multistage pump multiple centrifugal pump front shroud of impeller gap |
| CN108397389A (en) * | 2018-03-15 | 2018-08-14 | 潘晓江 | A kind of vacuum pump and its multistage vacuum pump |
| CN209115334U (en) * | 2018-12-05 | 2019-07-16 | 威海天宇新材料科技有限公司 | Water-ring vacuum pump |
-
2018
- 2018-12-05 CN CN201811476563.2A patent/CN109296533A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB691425A (en) * | 1950-06-03 | 1953-05-13 | Otto Siemen | Improvements in or relating to two stage liquid-ring air-pumps |
| FR1235237A (en) * | 1958-10-08 | 1960-07-01 | Siemens Ag | Large Capacity Double Acting Two Stage Liquid Ring Gas Pump |
| US3228587A (en) * | 1962-10-17 | 1966-01-11 | Siemen & Hinsch Gmbh | Liquid-ring gas pumps |
| JPS52109611A (en) * | 1976-03-11 | 1977-09-14 | Kubota Ltd | Connecting method of enclosed liquid type vacuum pump |
| CN101929479A (en) * | 2009-06-24 | 2010-12-29 | 边疆 | Method for removing pump pipe differential pressure with high adaptivity |
| CN201437783U (en) * | 2009-07-30 | 2010-04-14 | 靖江市连成泵业有限公司 | Low rotational speed multilevel brimstone pump |
| CN202811403U (en) * | 2012-08-29 | 2013-03-20 | 崇左森隆林化科技有限公司 | Two-stage water ring pump |
| CN203430810U (en) * | 2013-08-23 | 2014-02-12 | 烟台沃尔姆真空技术有限公司 | Two-stage water-ring vacuum pump |
| CN203770060U (en) * | 2014-03-07 | 2014-08-13 | 胜瑞兰工业设备（苏州）有限公司 | Multi-head mass flow combined mechanical diaphragm pump |
| CN204646642U (en) * | 2015-04-16 | 2015-09-16 | 天津工程机械研究院 | The radial plunger pump pump housing |
| CN106286286A (en) * | 2016-08-25 | 2017-01-04 | 陈兆红 | Vane type parallel-connected pumps |
| CN107816341A (en) * | 2017-10-26 | 2018-03-20 | 宝鸡石油机械有限责任公司 | A kind of hydraulic-driven Modular pump pressure break sledge |
| CN207583631U (en) * | 2017-11-30 | 2018-07-06 | 浙江理工大学 | Study the mechanics experimental apparatus in centrifugal multistage pump multiple centrifugal pump front shroud of impeller gap |
| CN108397389A (en) * | 2018-03-15 | 2018-08-14 | 潘晓江 | A kind of vacuum pump and its multistage vacuum pump |
| CN209115334U (en) * | 2018-12-05 | 2019-07-16 | 威海天宇新材料科技有限公司 | Water-ring vacuum pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292292A (en) * | 2023-05-11 | 2023-06-23 | 沈阳铱宁重工机械制造有限公司 | Water ring type vacuum pump |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190201 |