CN208203676U - Multistage multi - Google Patents
Multistage multi Download PDFInfo
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- CN208203676U CN208203676U CN201721817559.9U CN201721817559U CN208203676U CN 208203676 U CN208203676 U CN 208203676U CN 201721817559 U CN201721817559 U CN 201721817559U CN 208203676 U CN208203676 U CN 208203676U
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- taper pipe
- pipe section
- section
- jet
- pipeline section
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Abstract
The utility model relates to a kind of Multistage multis, the the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section of nozzle are equipped with including front end, the inner hole of its first Taper Pipe section constitutes level-one jet media channel, annular gap between second Taper Pipe section and the first Taper Pipe section, which is constituted, is sucked medium channel, annular gap between third Taper Pipe section and the second Taper Pipe section constitutes secondary jets medium channel, and front port, the rear port of jet stream import pipeline section and the external port of suction inlet pipeline section of flaring pipeline section are respectively equipped with respective connecting flange.The utility model significantly expands power jet and the contact area for being sucked medium, and power jet is greatly improved to the Friction thrust for being sucked medium, improves jet stream to the suction for being sucked medium, improves suction flow.
Description
Technical field
The utility model relates to a kind of Multistage multi, use jet stream inhale the mode of penetrating carry out fluid conveying and
Mixing.
Background technique
It is existing use jet stream inhale the mode of penetrating carry out fluid conveying and mixed equipment be mainly Venturi tube or with Venturi tube original
The jet pump that science and engineering is made, tube body are divided into three parts, and front is diffuser, are equipped with outlet, for connecting output channel, centre is
Trunnion is equipped with and inhales loophole, and for connecting the pipeline for being penetrated medium by suction, rear portion is reducing pipe, is equipped with import, provides for connection high
The high-pressure medium pipeline of jet flow.In use, the jet media from pressure piping forms flow velocity very after reducing pipe, in trunnion
High jet stream, the medium of being penetrated by suction for inhaling loophole connection enter trunnion under the action of jet flow negative pressure, are mixed to form with jet media
Blending agent is projected from outlet together, into output channel, it is thus achieved that higher pressure conveying or mixed purpose.It is this to set
Standby defect is: by the limitation of equipment and relevant device, under certain occasion, smooth cone lacks Tribo-attractive power,
It is difficult to meet the requirement of output pressure and transfer efficiency.The very smooth cone medium of Venturi tube fluidic vectoring thrust penetrates medium to suction
Suction is insufficient.
In addition, although the jet pipe multistage of some jet pumps is located at the side of the pump housing and extends in the pump housing, extended segment
Certain blocking is formd to the intracorporal mixture for being sucked medium or being sucked medium and jet media is pumped, causes to be sucked
The medium or mixture for being sucked medium and jet media is few to the contact area of jet stream cone and to form frictional force few, causes
Jet pump jet stream low efficiency.
Utility model content
For the drawbacks described above for overcoming the prior art, the utility model provides a kind of Multistage multi, to increase
Large stream increases suction flow to the suction for being sucked medium.
Technical solution adopted by the utility model: a kind of Multistage multi comprising front end is equipped with pipe
Mouthful the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section, the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section
Axis is located along the same line, and backward, the first Taper Pipe section is located at the second Taper Pipe for biggish one end forward for lesser one end
Behind section, front end is extended in the second Taper Pipe section and there are annular gaps between the second Taper Pipe section, described
Second Taper Pipe section is located at behind the third Taper Pipe section, and front end extends in the third Taper Pipe section and bores with the third
There are annular gap between pipeline section, the inner hole of the first Taper Pipe section constitutes level-one jet media channel, the second Taper Pipe section
Annular gap between the first Taper Pipe section, which is constituted, is sucked medium channel, between the third Taper Pipe section and the second Taper Pipe section
Annular gap constitutes secondary jets medium channel, and the front end of the third Taper Pipe section is connected with flaring pipeline section, the flaring pipeline section
Front port constitute the outlet of jet pump, be equipped with corresponding connecting flange, the rear portion of the pump housing is equipped with jet stream import pipeline section, the pump housing
Side is equipped with suction inlet pipeline section, and the inlet side of level-one jet media channel and secondary jets medium channel is all connected with described
Jet stream import pipeline section, the rear port of the jet stream import pipeline section constitute the jet stream import of jet pump, are equipped with corresponding connecting flange,
Described to be sucked the inlet side connection suction inlet pipeline section for connecing medium channel, the external port of the suction inlet pipeline section is constituted
It is sucked and connects medium entrance, be equipped with corresponding connecting flange.
In use, being connect this jet pump with associated conduit by respective flange, connected by the import of jet stream import pipeline section
The jet stream pipeline used and be used as power is connect, jet stream is introduced, medium pipeline is sucked by the connection of suction inlet pipeline section, suction is sucked Jie
Matter, level-one jet media eject forward from the first Taper Pipe section nozzle, will be sucked being taken out in medium channel using negative pressure
It inhales medium to suck and mix, form level-one blending agent stream and continues flow forward, the jet stream in secondary jets medium channel is situated between
Matter ejects forward in the annular gap between third Taper Pipe section and the second Taper Pipe section, is formed and is aspirated to level-one blending agent
Level-one blending agent is sucked and is mixed by active force, is formed second level blending agent stream and is continued flow forward, in third Taper Pipe section
It continuess to mix in the flaring pipeline section of front end connection, is finally flowed out from diffuser front end.
The utility model has the beneficial effects that the utility model using Multi-stage jet and diagonal cross jet stream mouth structure and by
The mode of suction medium ectonexine wall jet includes the weir of outside nozzle, changes local jet direction and to being sucked medium
It carries out mixing and intersects suction force, significantly expand contact area, increase substantially the Friction thrust of jet body and suction body, so that
The mixing suction force of jet pump significantly increases, and preferably meets the requirement of a variety of blending agents conveying of higher efficiency.Due to adopting
Carry out inside and outside cross-mixing suction to being sucked medium with the mode of multi-stage multi-pipe jet pump, secondary jets nozzle in tandem
Upper formation staged intersects mixed flow pressure-raising effect.Because being sucked contact area stepwise increase inside and outside medium, this complexity
Hybrid jet stream significantly improves the pressure of ejector outlet medium.Simultaneously as jet stream pipe outlet, which is added, intersects oblique dentation knot
Structure has expanded jet media and the contact area for being sucked medium, improves jet pump working efficiency；Due to being sucked pipe outlet
It adds and intersects oblique dentalation, increase the contact area for being sucked medium and jet media, improve jet stream efficiency again；Again because
The oblique dentalation of the intersection that jet stream pipe outlet is added adds dentalation with suction channel outlet and matches, awave circle
All curves make jet media obtain biting connecions increase with the bent contact area for being sucked medium, further increase jet stream efficiency
Or reduce jet stream energy consumption.Step-type multi-step multitube jet stream, makes up the mixing for being sucked medium or being sucked medium and jet media
It increases substantially the suction capactity of jet pump in pipeline or the intracorporal flow velocity loss of pump, the interior oblique mixing jet of external chiasma and is taken out
The soakage for inhaling medium, the medium conveying for meeting higher efficiency requires, and the utility model is capable of forming sufficiently high output
Pressure, especially when sucking medium is steam exhaust, due to being converted to liquid after the mixing pressurization of same jet media, volume obviously subtracts
It is few, the volume and flow velocity of blending agent are thereby reduced, by the way of the application multi-stage multi-pipe high-efficiency jet, is constantly filled into
Jet media, advantageously reduce because steam exhaust condensation after volume become smaller bring flow velocity decline, while step-type multi-step intersect it is oblique
Filling into jet stream increases the medium momentum in jet pump step by step, is conducive to improve the media flow state in jet pump, mention
Thus the utilizing status of high power not only increases suction capactity, and also assures output pressure.In addition staged is intersected oblique
Jet stream is filled into further such that jet stream by the multistage that inter_curve area is layered and increased inside and outside medium is inhaled into mixing jet
Medium momentum in pump increases, and is conducive to improve the media flow state in jet pump again, then improve the utilizing status of power,
Thus not only the oblique mixing jet of staged intersection improves suction capactity, but also guarantees and increase output pressure.Applicant
Experiment repeatedly, using the Multistage multi of the utility model, in the parameter requests phase such as output pressure and aspiration
With in the case where, the pressure head of jet pump can be greatly lowered, reduce power consumption about 50% or more, multi-stage multi-pipe high-efficiency jet
The staged of pump intersect oblique mixing jet, be sucked medium inside and outside level come into full contact with and nozzle dentalation expand contact
The forced area of Friction thrust makes full use of the pressure and flow velocity of jet media, advantageously reduces mixing turbulent flow and smooth power, mentions
High suction force and suction effect, flash steam is reduced to industrial production, steam exhaust, waste heat discharge cause energy waste and environmental pollution its
Effect will be apparent, and industrial waste steam waste heat discharge, which is greatly reduced, to environmental protection requirement large area has abatement energy waste
It kills two birds with one stone effect with environmental pollution.
Detailed description of the invention
Fig. 1 is the schematic front view of the utility model；
Fig. 2 is the nozzle partial enlarged view of the utility model the first Taper Pipe section and the second Taper Pipe section；
Fig. 3 is A-A cross-sectional view shown in this Fig. 2；
Fig. 4 be the utility model relates to medium flow field mix schematic diagram.
Specific embodiment
Referring to figures 1-4, Multistage multi provided by the utility model includes that front end is equipped with nozzle
One Taper Pipe section 8, the second Taper Pipe section 9 and third Taper Pipe section 10, the axis of the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section
Line is located along the same line, and is that backward, the first Taper Pipe section is located at the second cone for biggish one end forward for lesser one end
Behind pipeline section, front end is extended in the second Taper Pipe section and there are annular gap, institutes between the second Taper Pipe section
The second Taper Pipe section is stated to be located at behind the third Taper Pipe section, front end extend in the third Taper Pipe section and with the third
There are annular gap 5 between Taper Pipe section, the inner hole of the first Taper Pipe section constitutes level-one jet media channel, second Taper Pipe
Annular gap between section and the first Taper Pipe section, which is constituted, is sucked medium channel, between the third Taper Pipe section and the second Taper Pipe section
Annular gap constitute secondary jets medium channel, the front end of the third Taper Pipe section is connected with flaring pipeline section 6, the diffuser
The front port of section constitutes the outlet of jet pump, is equipped with corresponding connecting flange, and the rear portion of the pump housing is equipped with jet stream import pipeline section 1, pump
The side of body is equipped with suction inlet pipeline section 3, and the inlet side of level-one jet media channel and secondary jets medium channel connects
The jet stream import pipeline section is connect, the rear port of the jet stream import pipeline section constitutes the jet stream import of jet pump, and the jet stream import was both
It is the import in level-one jet media channel and the import of secondary jets medium channel, is equipped with corresponding connecting flange, the quilt
The inlet side that suction connects medium channel connects the suction inlet pipeline section, and the external port composition of the suction inlet pipeline section is sucked
Medium entrance is connect, corresponding connecting flange is equipped with.
The rear end of the first Taper Pipe section can connect level-one jet media conveying pipeline section 2, be situated between with the level-one jet stream
Matter conveying pipeline section is connected, and the jet stream inlet tube section is located at behind level-one jet media conveying pipeline section, with described one
Grade jet media conveying pipeline section be linked together, be achieved in level-one jet media channel inlet side and the jet stream import
The connection of pipeline section.
The rear end of the second Taper Pipe section, which can connect, is sucked medium delivery pipe section 4, and described to be sucked medium defeated
Pipeline section is sent to be connected, the medium delivery pipe section that is sucked covers in the outside of level-one jet media conveying pipeline section, with institute
State between level-one jet media conveying pipeline section there are annular gap, its rear end be equipped with for the level-one jet media delivery pipe
The sealed connection end plate of section sealing, the inner end of the suction inlet pipeline section be connected to it is described be sucked in medium delivery pipe section, by
The connection of the inlet side Yu the suction inlet pipeline section that connect medium channel is sucked described in this realization.
Jet stream connecting tube 7, the third Taper Pipe can be equipped between the third Taper Pipe section and the jet stream import pipeline section
The rear end of section be equipped with for the second Taper Pipe section and described be sucked integral structure sealing that medium delivery pipe section is linked to be
It is tightly connected pipeline section, the jet stream connecting tube is located at the outside for being sucked medium delivery pipe section, the jet stream connecting tube
Outlet end is connected on the sealed connection pipeline section, is achieved in the inlet side and the jet stream of the secondary jets medium channel
The jet media of import pipeline section is introduced secondary jets medium entrance, forms secondary jets by the connection of import pipeline section.
In general, the same jet apparatus is seen on the whole should not select a variety of pressure mediums, high-pressure medium selects a kind of pressure
Power is easier, so a fluidic communication pipe is added between level-one jet body and secondary jets body, in assurance function premise
Lower simplified overall structure can increase on the pipeline and shut down or control valve, for meeting the multi-stage multi-pipe in a variety of situations
A variety of demands of jet pump outlet ends pressure change.
The sealed connection pipeline section can be sucked to be sucked the isometrical round tube of medium delivery pipe section with described with described
The round tube of medium delivery pipe linking into an integrated entity of section, the sealed joint pipe can also be considered as the suction medium conveying as a result,
Exceed the front extensions of the second Taper Pipe section on pipeline section.
Preferably, the nozzle of the second Taper Pipe section is located at behind the nozzle of the third Taper Pipe section, and diameter is preferably small
Improve suction and mixed effect in the nozzle diameter of third Taper Pipe section preferably to organize each section medium flow field.
Preferably, the jet stream import pipeline section and level-one jet media conveying pipeline section are coaxial, have a diameter larger than described
Level-one jet media conveys the diameter of pipeline section, and the input end of the jet stream connecting tube is connected to the side wall of the jet stream import pipeline section
On, to optimize structure, reduce resistance.
The first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section can be equipped with the regular conical of nozzle in front end,
The main part and the main part for being sucked medium delivery pipe section of the level-one jet stream conveying pipeline section are in tubular.
Preferably, the nozzle of the first Taper Pipe section and/or the nozzle of the second Taper Pipe section can use dentalation, such as
Be preferably provided on the nozzle of the dentalation of slot dentation, zigzag etc., the first Taper Pipe section and/or the second Taper Pipe section part to
The flare tooth 12 that tilted introversion tooth 11 and/or part is inclined outwardly, the introversion tooth is preferably with other teeth (for example, flare
Tooth and/or not inside and outside inclined tooth) it distributes alternately, the flare tooth is preferably with other teeth (for example, introversion tooth and/or not inside and outside
Inclined tooth) it distributes alternately, the dentalation can also be using the oblique dentalation of intersection.
The intilted introversion in part can be equipped on the nozzle of the first Taper Pipe section and/or the nozzle of the second Taper Pipe section
Tooth 11 and/or the flare tooth 12 that is inclined outwardly of part, the introversion tooth is preferably with other teeth (for example, flare tooth and/or not inside and outside
Inclined tooth) it distributes alternately, the flare tooth is preferably alternate with other teeth (for example, introversion tooth and/or not inside and outside inclined tooth)
Distribution.
Preferably, the dentalation can also be using the oblique dentalation of intersection.
By the design of above-mentioned nozzle tooth form, increases the inside and outside contact area of the jet stream cone of fluidic vectoring thrust and improve mixed
It closes Friction thrust and can be improved jet pump suction force and pumping efficiency for reducing kinetic energy itself consumption of high-pressure jet, expand
Contact area and Friction thrust between large stream medium and suction medium.
The nozzle of the third Taper Pipe section can be equipped with water conservancy diversion Mixed Weir, and the water conservancy diversion Mixed Weir can be inward flange in convex
The inside annular protrusion of recessed structure can inwardly protruded annular or edge with sawtooth or slot tooth be in radially wave
The scraggly construction of the annular of shape or other similar edge, the quantity of tooth (or protrusion of other shapes) is excellent on weir
Choosing is mutually filled a vacancy with position with the dentation on the second Taper Pipe section nozzle corresponding.
Due to the setting of water conservancy diversion Mixed Weir, the medium " provoking " is directly or indirectly mixed into and is sucked medium under effect of inertia
In cone, the jet media of whole circumference body is mixed with medium " dog " is sucked, and cross-contact area and Friction thrust obtain
To significantly being promoted, cross-mixing swabbing action is played to medium is sucked, keeps its suction force big, suction effect is good, preceding
Orderly aligned intersection water conservancy diversion Mixed Weir is set afterwards, is mutually cooperateed with the nozzle tooth form of the first, second Taper Pipe section, forms ladder again
Formula pressure-raising effect is capable of the requirement of the medium conveying of further satisfaction higher efficiency.
This Multistage multi, in use, as needed, if it is the situation of less demanding in outlet pressure
Under, in order to reduce the kinetic energy rejection of jet media, by jet media and it can also be sucked media interchange position, effect is also feasible
Reliably.
Above-described embodiment only expresses certain specific embodiment of the utility model, and the description thereof is more specific and detailed,
But it cannot be therefore understands that for a limitation on the scope of the patent of the present invention, made by all utilization the utility model descriptions
Equivalent structure, be applied directly or indirectly in other relevant technical fields, similarly include the utility model patent protect
It protects in range.
It is disclosed by the utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill
Art means are that further limiting for another technological means is outer, can form several different technical solutions in any combination.
Claims (10)
1. a kind of Multistage multi, it is characterised in that be equipped with the first Taper Pipe section, the second cone of nozzle including front end
The axis of pipeline section and third Taper Pipe section, the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section is located along the same line, and
Backward, the first Taper Pipe section is located at behind the second Taper Pipe section, and front end extends to for biggish one end forward for lesser one end
There are annular gap in the second Taper Pipe section and between the second Taper Pipe section, the second Taper Pipe section is located at the third
Behind Taper Pipe section, front end is extended in the third Taper Pipe section and between the third Taper Pipe section there are annular gap,
The inner hole of the first Taper Pipe section constitutes level-one jet media channel, the annular between the second Taper Pipe section and the first Taper Pipe section
Gap constitutes and is sucked medium channel, and the annular gap between the third Taper Pipe section and the second Taper Pipe section constitutes secondary jets and is situated between
Matter channel, the front end of the third Taper Pipe section are connected with flaring pipeline section, and the front port of the flaring pipeline section constitutes going out for jet pump
Mouthful, it is equipped with corresponding connecting flange, the rear portion of the pump housing is equipped with jet stream import pipeline section, and the side of the pump housing is equipped with suction inlet pipeline section,
The inlet side of level-one jet media channel and secondary jets medium channel is all connected with the jet stream import pipeline section, the jet stream
The rear port of import pipeline section constitutes the jet stream import of jet pump, is equipped with corresponding connecting flange, and described be sucked connects medium channel
Inlet side connect the suction inlet pipeline section, the external port composition of the suction inlet pipeline section, which is sucked, connects medium entrance, if
There is corresponding connecting flange.
2. jet pump as described in claim 1, it is characterised in that the rear end of the first Taper Pipe section is connected with level-one jet stream Jie
Matter conveys pipeline section, is connected with level-one jet media conveying pipeline section, the jet stream inlet tube section is located at the level-one and penetrates
Flow medium conveys behind pipeline section, is linked together with level-one jet media conveying pipeline section, is achieved in the level-one jet stream and is situated between
The connection of the inlet side in matter channel and the jet stream import pipeline section.
3. jet pump as claimed in claim 2, it is characterised in that the rear end of the second Taper Pipe section, which is connected with, is sucked medium
Pipeline section is conveyed, is connected with the medium delivery pipe section that is sucked, the medium delivery pipe section that is sucked is covered in the level-one
Jet media conveys the outside of pipeline section, and there are annular gap between level-one jet media conveying pipeline section, its rear end is equipped with
For the sealed connection end plate with level-one jet media conveying segment seal, the inner end of the suction inlet pipeline section is connected to
It is described to be sucked in medium delivery pipe section, it is achieved in the inlet side and the suction inlet pipe for being sucked and connecing medium channel
The connection of section.
4. jet pump as claimed in claim 3, it is characterised in that between the third Taper Pipe section and the jet stream import pipeline section
Equipped with jet stream connecting tube, the rear end of the third Taper Pipe section be equipped with for the second Taper Pipe section and described to be sucked medium defeated
The sealed connection pipeline section for the integral structure sealing for sending pipeline section to be linked to be, the jet stream connecting tube are sucked medium delivery pipe positioned at described
The outside of section, the outlet end of the jet stream connecting tube are connected on the sealed connection pipeline section, are achieved in the secondary jets
The connection of the inlet side of medium channel and the jet stream import pipeline section.
5. jet pump as claimed in claim 4, it is characterised in that the sealed connection pipeline section is and described to be sucked medium defeated
The round tube that pipeline section is isometrical is sent, with the round tube for being sucked medium delivery pipe linking into an integrated entity of section.
6. jet pump as claimed in claim 5, it is characterised in that the jet stream import pipeline section and the level-one jet media are defeated
It send pipeline section coaxial, has a diameter larger than the diameter of the level-one jet media conveying pipeline section, the input end of the jet stream connecting tube connects
It connects on the side wall of the jet stream import pipeline section.
7. jet pump as claimed in claim 6, it is characterised in that the first Taper Pipe section, the second Taper Pipe section and third Taper Pipe section
It is equipped with the regular conical of nozzle in front end, the main part of level-one jet media conveying pipeline section and described is sucked medium
The main part for conveying pipeline section is in tubular.
8. jet pump as claimed in claim 1, it is characterised in that the nozzle of the first Taper Pipe section uses dentation knot
Structure is preferably provided with the intilted introversion tooth in part and/or part on the nozzle of the dentalation of the first Taper Pipe section outward
Inclined flare tooth, the introversion tooth preferably distribute alternately with other teeth, and the flare tooth preferably distributes alternately with other teeth, institute
Stating dentalation can also be using the oblique dentalation of intersection.
9. jet pump as claimed in claim 8, it is characterised in that the nozzle of the second Taper Pipe section is all made of dentalation, institute
It states and is preferably provided with part intilted introversion tooth on the nozzle of the dentalation of the second Taper Pipe section and/or part is inclined outwardly
Flare tooth, the introversion tooth preferably distribute alternately with other teeth, and the flare tooth preferably distributes alternately with other teeth, the dentation
Structure can also be using the oblique dentalation of intersection.
10. jet pump as claimed in claim 9, it is characterised in that the nozzle of the third Taper Pipe section is equipped with water conservancy diversion Mixed Weir,
The water conservancy diversion Mixed Weir is the inside annular protrusion that inward flange is in convex-concave structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721027210 | 2017-08-16 | ||
| CN2017210272105 | 2017-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208203676U true CN208203676U (en) | 2018-12-07 |
Family
ID=64490161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721817559.9U Expired - Fee Related CN208203676U (en) | 2017-08-16 | 2017-12-22 | Multistage multi |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208203676U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360165A (en) * | 2019-07-02 | 2019-10-22 | 江苏瑞洪盐业有限公司 | A kind of twin-stage jet pump design method and device |
| CN110685964A (en) * | 2019-11-13 | 2020-01-14 | 四川大学 | Jet pump capable of automatically and uniformly supplementing air and reducing corrosion |
| CN110685645A (en) * | 2019-09-26 | 2020-01-14 | 中石油煤层气有限责任公司 | Two-stage jet drainage device and method for coal-bed gas well mouth |
-
2017
- 2017-12-22 CN CN201721817559.9U patent/CN208203676U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360165A (en) * | 2019-07-02 | 2019-10-22 | 江苏瑞洪盐业有限公司 | A kind of twin-stage jet pump design method and device |
| CN110685645A (en) * | 2019-09-26 | 2020-01-14 | 中石油煤层气有限责任公司 | Two-stage jet drainage device and method for coal-bed gas well mouth |
| CN110685964A (en) * | 2019-11-13 | 2020-01-14 | 四川大学 | Jet pump capable of automatically and uniformly supplementing air and reducing corrosion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20191222 |