CN102124989A - Impeller-free aerator - Google Patents
Impeller-free aerator Download PDFInfo
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- CN102124989A CN102124989A CN2011100357049A CN201110035704A CN102124989A CN 102124989 A CN102124989 A CN 102124989A CN 2011100357049 A CN2011100357049 A CN 2011100357049A CN 201110035704 A CN201110035704 A CN 201110035704A CN 102124989 A CN102124989 A CN 102124989A
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- water
- fixed mount
- cover body
- water spray
- connecting rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses an impeller-free aerator. The impeller-free aerator comprises a floating body and a water spraying cover body, wherein the water spraying cover body comprises an annular outer cover and an inner ring arranged on the inner side of the outer cover, and a cavity is formed between the outer cover and the inner ring; the tail end edge of the outer cover and the tail end edge of the inner ring are sleeved and connected, and an annular nozzle which is cut along the inner wall of the inner ring is formed between the front end edge of the outer cover and the front end edge of the inner ring; the water spraying cover body is connected to the floating body through a multidirectional suspension which can control the elevation of the water spraying cover body; and the water spraying cover body is connected with a water supply module which can supply water to the cavity between the outer cover and the inner ring. The impeller-free aerator is an impeller-free aerator which is safe in aeration, large in aeration volume, and high in efficiency and of which the aeration water layer is controllable.
Description
Technical field
The present invention relates to a kind of aeration oxygen replenishing machinery, relate in particular to no paddle aerator.
Background technology
Aerator has oxygenation, stirs three aspect effects such as water and aeration.Common having is water jet, Waterwheel-type, pipe leaf formula, gush types such as spray formula, jetting type and vane type, but prevents that with vane type oxygenation the effect that fish raise the nose above water to breathe is best.When the water surface of aerator load was big, the effect of oxygenation was also not obvious, if the little then cost of the load water surface raises, to improve the effect of whole water body dissolved oxygen state more apparent outstanding so paddle aerator is by stirring water.Paddle aerator has the good water-based energy that stirs, and the upwards axial upwelling and the wake of water lift are arranged, and can cause the water circulation circulation of whole pond.And the advantage of jet aerator is there is not impeller, and safety is better.The innovation and creation that relate to aerator are more, as Chinese utility model patent " a kind of jet aerator ", patent No. ZL 200,620 1 10537.4, a kind of jet aerator of being made up of water pump, water inlet pipe, ejector, floating drum carriage, ejector support is disclosed, water pump is installed in the floating drum carriage and bubbles through the water column, and ejector is installed in ejector support lower end and pulls the plug.This jet aerator can be installed in any position in fish pond, and available mode of traction moves aerator in the fish pond.Yet there is the little shortcoming of oxygenation water body in it.
Summary of the invention
The objective of the invention is to provides a kind of oxygenation safety, oxygenation water body volume is big, efficient is high, the oxygenation water layer is controlled no paddle aerator at prior art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: no paddle aerator, comprise buoyancy aid, and also have the water spray cover body; The water spray cover body contains the outer cover of annular and is installed in the interior ring of outer cover inboard, and has cavity between outer cover and the interior ring; The terminal bead of outer cover is connected with the terminal bead fit of interior ring, has the annular jet of wall opening in the interior ring between the front end bead of outer cover and the front end bead of interior ring; The multidirectional suspension of water spray cover body through controlling this water spray cover body elevation angle is connected on the buoyancy aid; The water spray cover body is connected with can be to the water supply assembly of the water supply of the cavity between outer cover and the interior ring.The double-deck hollow structure that the water spray cover body adopts externally supplies water after assembly supplies water, and is by annular jet that water is spouting along interior ring inwall.Owing to be higher than water velocity around the water spray cover body front end edge mouth from annular jet ejection water water velocity, therefore form negative pressure, these water that are positioned at around the front end bead are together brought into and ejection rearward.Promptly be that a large amount of water of water spray cover body front end is inhaled into and from the rear ejection, plays the effect that promotes that water body flows on the macroscopic view, and because water spray cover body diameter is big, so water flux density also adopts common mode bigger.Multidirectional suspension is used to control the elevation angle of water spray cover body and horizontal plane, can as required the water spray cover body be adjusted to suitable direction like this, and the different depth water layer is carried out oxygenation.Realized that also the weep that produces with the water supply assembly causes the flowing of a large amount of water of water spray cover body front end, efficiency of energy utilization is higher.Therefore the water spray cover body can not cause damage to fish owing to there is not impeller.
For optimizing technique scheme, the measure of taking also comprises:
Multidirectional suspension comprises preceding fixed mount and the back fixed mount that be arranged in parallel, also comprises supporting leverage and making preceding fixed mount and back fixed mount do the movable rod system of opposing parallel displacement; Multidirectional suspension is provided with the imperial crown gear stop of angle between energy multistage regulation and control movable rod system and the preceding fixed mount.Effect that adopt to support leverage is firm whole multidirectional suspension, prevents when oxygenation because the instability that the recoil of current causes is vibrated.Movable rod system, preceding fixed mount, back fixed mount and the tie point that is fixed on the water spray cover body of below on the side, form a similar parallelogram sturcutre, therefore under the situation that changes one of them angle, identical change is also made at its diagonal angle, it is parallel to make opposite side remain, thereby be limited in more than the water surface by imperial crown gear stop and realize angle between movable rod system and the preceding fixed mount, and then the water spray cover body that is positioned at is under water carried out the control of water spraying direction.
The circulus that preceding fixed mount lower end has is socketed on the joint pin of water spray cover body; The circulus that back fixed mount lower end has is socketed on the joint pin of water spray cover body.Before fixed mount and the back circulus that all has of fixed mount be socketed on the joint pin, make the water cover body freely to rotate, thus with the different elevations angle to the oxygenation of spraying water of different water layers.
Support leverage and contain spacing support bar, load-bearing support bar and auxiliary support bar; The load-bearing support bar is connected with preceding fixed mount, and the end of load-bearing support bar is fixed on the buoyancy aid.What the load-bearing support bar played is the effect of fixing, and the position of preceding fixed mount is remained on state perpendicular to buoyancy aid.And change the position of auxiliary support bar accordingly, according to the character of parallelogram, back fixed mount also remains perpendicular to buoyancy aid, yet has but changed the elevation angle of water spray cover body indirectly.
Movable rod system comprises spacing connecting rod and reinforces connecting rod; The two ends that reinforce connecting rod are shaped on circulus and preceding fixed mount of difference socket movingly and back fixed mount; The top of fixed mount and the top of back fixed mount before the two ends difference socket movingly of spacing connecting rod, and spacing connecting rod is parallel with the reinforcing connecting rod.Spacing connecting rod has formed the top margin of the parallelogram sturcutre of the multidirectional suspension of the present invention, and preceding fixed mount and back fixed mount are two hypotenuses, and the joint pin of water spray cover body is formed to be the base.Reinforce connecting rod and be used to reinforce parallelogram sturcutre.
Imperial crown gear stop has limiting tooth, position-limited groove, fixing slot and spiral firmware; Fixing slot can fix spacing connecting rod, fixed mount position-limited groove can cooperate fixing under the restriction of spiral firmware before.The radial position-limited groove that is shaped on the imperial crown gear stop, and bossing is limiting tooth between the position-limited groove, the position of fixed mount before being used to limit, by the conversion of angle between spacing connecting rod in the fixing slot and the preceding fixed mount, and then realization is to the setting at the water spray cover body water spray elevation angle.
Buoyancy aid is fixed by the connecting rod group.
The water supply assembly comprises water pump, filter bowl, conduit; Water pump is an immersible pump, and water inlet is coated with filter bowl; Be evenly equipped with ellipse hole on the filter bowl; The water injection pipe of immersible pump on conduit connection water spray cover body.Filter bowl with through hole can prevent that fishes and shrimps are inhaled into water pump, prevents economic loss.The water supply assembly also can be made up of water pump, conduit, aqueduct, filter screen; Water pump is installed on the buoyancy aid, and the port of water pump aqueduct is provided with filter screen; The water injection pipe of water pump on conduit connection water spray cover body.By water pump is installed on the buoyancy aid, can prevent that the greasy dirt of water pump from entering water body, help ecologic breeding.Filter screen can prevent the suction of fishes and shrimps, therefore also can adopt above-mentioned structure with filter bowl of through hole.
Because the present invention does not have paddle aerator and has adopted and have the water spray cover body; The water spray cover body contains the outer cover of annular and is installed in the interior ring of outer cover inboard, and has cavity between outer cover and the interior ring; The terminal bead of outer cover is connected with the terminal bead fit of interior ring, has the annular jet of wall opening in the interior ring between the front end bead of outer cover and the front end bead of interior ring; The multidirectional suspension of water spray cover body through controlling this water spray cover body elevation angle is connected on the buoyancy aid; The water spray cover body is connected with can be to the structures such as water supply assembly of the water supply of the cavity between outer cover and the interior ring, it has the following advantages: the double-deck hollow structure that the water spray cover body adopts externally supplies water after assembly supplies water, and is by annular jet that water is spouting along interior ring inwall.Owing to be higher than water velocity around the water spray cover body front end edge mouth from annular jet ejection water water velocity, therefore form negative pressure, these water that are positioned at around the front end bead are together brought into and ejection rearward.Promptly be that a large amount of water of water spray cover body front end is inhaled into and from the rear ejection, plays the effect that promotes that water body flows on the macroscopic view, and because water spray cover body diameter is big, so water flux density also adopts common mode bigger.Multidirectional suspension is used to control the elevation angle of water spray cover body and horizontal plane, can as required the water spray cover body be adjusted to suitable direction like this, and the different depth water layer is carried out oxygenation.Realized that also the weep that produces with the water supply assembly causes the flowing of a large amount of water of water spray cover body front end, efficiency of energy utilization is higher.
Description of drawings
Fig. 1 is the embodiment of the invention 1 main sectional structure schematic diagram of looking;
Fig. 2 is the embodiment of the invention 1 a right TV structure schematic diagram;
Fig. 3 is the embodiment of the invention 1 a plan structure schematic diagram;
Fig. 4 is the embodiment of the invention 1 perspective view;
Fig. 5 is near the sectional perspective structural representation the embodiment of the invention 1 imperial crown gear stop;
Fig. 6 is the embodiment of the invention 2 main sectional structure schematic diagrames of looking.
Embodiment
Below in conjunction with attached embodiment the present invention is described in further detail.
Drawing reference numeral explanation: water spray cover body 1, interior ring 11, outer cover 12, annular jet 13, water injection pipe 14, joint pin 15, multidirectional suspension 2, preceding fixed mount 21, back fixed mount 22, support leverage 23, spacing support bar 23a, load-bearing support bar 23b, auxiliary support bar 23c, movable rod is 24, spacing connecting rod 24a, reinforce connecting rod 24b, imperial crown gear stop 25, limiting tooth 25a, position-limited groove 25b, fixing slot 25c, spiral firmware 25d, water supply assembly 3, water pump 31, filter bowl 32, conduit 33, aqueduct 34, filter screen 35, buoyancy aid 4, connecting rod group 41.
Embodiment 1: referring to figs. 1 through Fig. 5, no paddle aerator comprises buoyancy aid 4, also has water spray cover body 1; Water spray cover body 1 contains the outer cover 12 of annular and is installed in the interior ring 11 of outer cover 12 inboards, and has cavity between outer cover 12 and the interior ring 11; The terminal bead of outer cover 12 is connected with the terminal bead fit of interior ring 11, has between the front end bead of outer cover 12 and the front end bead of interior ring 11 along the annular jet 13 of interior ring 11 interior wall openings; The multidirectional suspension 2 of water spray cover body 1 through controlling this water spray cover body 1 elevation angle is connected on the buoyancy aid 4; Water spray cover body 1 is connected with can be to the water supply assembly 3 of the water supply of the cavity between outer cover 12 and the interior ring 11.The double-deck hollow structure that water spray cover body 1 adopts externally supplies water after assembly 3 supplies water, and is by annular jet 13 that water is spouting along interior ring 11 inwalls.Owing to be higher than water velocity around the water spray cover body 1 front end bead from annular jet 13 ejection water water velocities, therefore form negative pressure, these water that are positioned at around the front end bead are together brought into and ejection rearward.Promptly be that a large amount of water of water spray cover body 1 front end is inhaled into and from the rear ejection, plays the effect that promotes that water body flows on the macroscopic view, and because water spray cover body 1 diameter is big, so water flux density also adopts common mode bigger.Multidirectional suspension 2 is used to control the elevation angle of water spray cover body 1 and horizontal plane, can as required water spray cover body 1 be adjusted to suitable direction like this, and the different depth water layer is carried out oxygenation.Also realized causing with the weep that water supply assembly 3 produces the flowing of a large amount of water of water spray cover body 1 front end, efficiency of energy utilization is higher.
The circulus that preceding fixed mount 21 lower ends have is socketed on the joint pin 15 of water spray cover body 1; The circulus that back fixed mount 22 lower ends have is socketed on the joint pin 15 of water spray cover body 1.Before fixed mount 21 and the back circulus that all has of fixed mount 22 be socketed on the joint pin 15, make water spray cover body 1 freely to rotate, thus with the different elevations angle to the oxygenation of spraying water of different water layers.
Support leverage 23 and contain spacing support bar 23a, load-bearing support bar 23b and auxiliary support bar 23c; Load-bearing support bar 23b is connected with preceding fixed mount 21, and the end of load-bearing support bar 23b is fixed on the buoyancy aid 4.What load-bearing support bar 23b played is the effect of fixing, and the position of preceding fixed mount 21 is remained on state perpendicular to buoyancy aid 4.And change the position of auxiliary support bar 23c accordingly, according to the character of parallelogram, back fixed mount 22 also remains perpendicular to buoyancy aid 4, yet has but changed the elevation angle of water spray cover body 1 indirectly.
Movable rod is 24 to comprise spacing connecting rod 24a and reinforce connecting rod 24b; The two ends that reinforce connecting rod 24b are shaped on circulus and preceding fixed mount 21 of difference socket movingly and back fixed mount 22; The top of fixed mount 21 and the top of back fixed mount 22 before the two ends difference socket movingly of spacing connecting rod 24a, and spacing connecting rod 24a is parallel with reinforcing connecting rod 24b.Spacing connecting rod 24a has formed the top margin of the parallelogram sturcutre of the multidirectional suspension 2 of the present invention, and preceding fixed mount 21 and back fixed mount 22 are two hypotenuses, and the joint pin of water spray cover body 1 15 is formed to be the base.Reinforce connecting rod 24b and be used to reinforce parallelogram sturcutre.
Imperial crown gear stop 25 has limiting tooth 25a, position-limited groove 25b, fixing slot 25c and spiral firmware 25d; Fixing slot 25c can fix spacing connecting rod 24a, fixed mount 21 position-limited groove 25b can cooperate fixing under spiral firmware 25d restriction before.The radial position-limited groove 25b that is shaped on the imperial crown gear stop 25, and bossing is limiting tooth 25a between the position-limited groove 25b, the position of fixed mount 21 before being used to limit, by the conversion of angle between spacing connecting rod 24a in the fixing slot 25c and the preceding fixed mount 21, and then realization is to the setting at the water spray cover body 1 water spray elevation angle.
The solid pool mode of spraying for the multidirectional oxygenation of horizontal direction, can be with reference to Chinese utility model patent " floating type voluntarily Jet-flow oxygen increasing machine ", patent No. CN87211114U, solid pool mode wherein can be used for the Gu Bo of the present invention at cultivating pool, because the moment of horizontal direction of the present invention is also uneven, therefore can utilize its principle to do adaptive laying, thereby realize that vertical direction passes through artificial regulatory, horizontal bedding is realized floating type voluntarily oxygenation by torque difference, because length is limit, and repeats no more.
Embodiment 2: with reference to Fig. 6, present embodiment is done certain change on the basis of embodiment 1, specifically is that water supply assembly 3 comprises water pump 31, conduit 33, aqueduct 34, filter screen 35; Water pump 31 is installed on the buoyancy aid 4, and the port of water pump 31 aqueducts 34 is provided with filter screen 35; The water injection pipe 14 of water pump 31 on conduit 33 connection water spray cover bodies 1.By water pump 31 is installed on the buoyancy aid 4, can prevent that the greasy dirt of water pump 31 from entering water body, help ecologic breeding.Filter screen 35 can prevent the suction of fishes and shrimps, therefore also can adopt above-mentioned structure with filter bowl 32 of through hole.Wireway with water surface air communication can also be set near annular jet 13, under near the suction function annular jet 13, water surface air can be introduced in the water, and together be sprayed backward, with the effect of further increase oxygenation with current.
Although described the present invention in conjunction with preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can implement the displacement and the modification of various changes, coordinate to the theme of listing here, so protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed.
Claims (9)
1. do not have paddle aerator, comprise buoyancy aid (4), it is characterized in that: have water spray cover body (1); Described water spray cover body (1) contains the outer cover (12) of annular and is installed in the inboard interior ring (11) of outer cover (12), and has cavity between outer cover (12) and the interior ring (11); The terminal bead of described outer cover (12) is connected with the terminal bead fit of interior ring (11), has between the front end bead of the front end bead of described outer cover (12) and interior ring (11) along the annular jet (13) of described interior ring (11) interior wall opening; The multidirectional suspension (2) of described water spray cover body (1) through controlling this water spray cover body (1) elevation angle is connected on the described buoyancy aid (4); Described water spray cover body (1) is connected with can be to the water supply assembly (3) of the water supply of the cavity between described outer cover (12) and the interior ring (11).
2. no paddle aerator according to claim 1, it is characterized in that: described multidirectional suspension (2) comprises preceding fixed mount (21) and the back fixed mount (22) that be arranged in parallel, also comprises the movable rod system (24) that supports leverage (23) and can make described preceding fixed mount (21) and back fixed mount (22) do the opposing parallel displacement; It can the described movable rod of multistage regulation and control be the imperial crown gear stop (25) of angle between (24) and the described preceding fixed mount (21) that described multidirectional suspension (2) is provided with.
3. no paddle aerator according to claim 2 is characterized in that: the circulus that fixed mount (21) lower end has before described is socketed on the joint pin (15) of described water spray cover body (1); The circulus that fixed mount (22) lower end, described back has is socketed on the joint pin (15) of described water spray cover body (1).
4. no paddle aerator according to claim 2 is characterized in that: described support leverage (23) contains spacing support bar (23a), load-bearing support bar (23b) and auxiliary support bar (23c); Described load-bearing support bar (23b) is connected with preceding fixed mount (21), and the end of load-bearing support bar (23b) is fixed on the described buoyancy aid (4).
5. no paddle aerator according to claim 2 is characterized in that: described movable rod system (24) comprises spacing connecting rod (24a) and reinforces connecting rod (24b); The two ends of described reinforcing connecting rod (24b) are shaped on circulus and described preceding fixed mount (21) of difference socket movingly and back fixed mount (22); The top of fixed mount (21) and the top of back fixed mount (22) before the two ends difference socket movingly of described spacing connecting rod (24a) is described, and spacing connecting rod (24a) is parallel with described reinforcing connecting rod (24b).
6. no paddle aerator according to claim 4 is characterized in that: described imperial crown gear stop (25) has limiting tooth (25a), position-limited groove (25b), fixing slot (25c) and spiral firmware (25d); Described fixing slot (25c) can fix described spacing connecting rod (24a), fixed mount (21) before described position-limited groove (25b) can cooperate fixing described under described spiral firmware (25d) restriction.
7. no paddle aerator according to claim 1 is characterized in that: described water supply assembly (3) comprises water pump (31), filter bowl (32), conduit (33); Described water pump (31) is an immersible pump, and water inlet is coated with described filter bowl (32); Described filter bowl is evenly equipped with ellipse hole on (32); The water injection pipe (14) of described immersible pump on conduit (33) the described water spray cover body of connection (1).
8. no paddle aerator according to claim 1 is characterized in that: described water supply assembly (3) comprises water pump (31), conduit (33), aqueduct (34), filter screen (35); Described water pump (31) is installed on the described buoyancy aid (4), and the port of water pump (31) aqueduct (34) is provided with filter screen (35); The water injection pipe (14) of described water pump (31) on conduit (33) the described water spray cover body of connection (1).
9. no paddle aerator according to claim 1 is characterized in that: described buoyancy aid (4) is fixing by connecting rod group (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110035704A CN102124989B (en) | 2011-01-26 | 2011-01-26 | Impeller-free aerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110035704A CN102124989B (en) | 2011-01-26 | 2011-01-26 | Impeller-free aerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102124989A true CN102124989A (en) | 2011-07-20 |
| CN102124989B CN102124989B (en) | 2012-10-03 |
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ID=44263446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110035704A Expired - Fee Related CN102124989B (en) | 2011-01-26 | 2011-01-26 | Impeller-free aerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102124989B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107540080A (en) * | 2017-09-27 | 2018-01-05 | 江苏天雨环保集团有限公司 | It is a kind of to be aerated plug flow device without impeller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211114U (en) * | 1987-07-27 | 1988-09-14 | 南京农机学会 | Automatic float type shooting flow oxygen enriched machine |
| CN87214816U (en) * | 1987-10-26 | 1988-10-26 | 福州大学 | Jet-stream oxygen-increasing machine |
| JPH0474596A (en) * | 1990-07-16 | 1992-03-09 | Masao Maruyama | Aeration tank |
| CN2887057Y (en) * | 2006-05-11 | 2007-04-11 | 重庆大学 | A jet-flow type oxygen supplying machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4074596B2 (en) * | 2004-03-18 | 2008-04-09 | 日立マクセル株式会社 | Rechargeable battery or rechargeable battery pack |
-
2011
- 2011-01-26 CN CN201110035704A patent/CN102124989B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211114U (en) * | 1987-07-27 | 1988-09-14 | 南京农机学会 | Automatic float type shooting flow oxygen enriched machine |
| CN87214816U (en) * | 1987-10-26 | 1988-10-26 | 福州大学 | Jet-stream oxygen-increasing machine |
| JPH0474596A (en) * | 1990-07-16 | 1992-03-09 | Masao Maruyama | Aeration tank |
| CN2887057Y (en) * | 2006-05-11 | 2007-04-11 | 重庆大学 | A jet-flow type oxygen supplying machine |
Non-Patent Citations (1)
| Title |
|---|
| 《中国优秀硕士学位论文全文数据库 工程科技II辑》 20071231 刘晖霞 环形射流泵产生空化的机理及其改善的研究 C029-96 , 第6期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107540080A (en) * | 2017-09-27 | 2018-01-05 | 江苏天雨环保集团有限公司 | It is a kind of to be aerated plug flow device without impeller |
| CN107540080B (en) * | 2017-09-27 | 2023-12-01 | 江苏天雨环保集团有限公司 | Impeller-free aeration plug flow device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102124989B (en) | 2012-10-03 |
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Granted publication date: 20121003 Termination date: 20130126 |