CN201433904Y - Vertical punching multilevel centrifugal pump adopting conical surface structure for fixing impeller - Google Patents
Vertical punching multilevel centrifugal pump adopting conical surface structure for fixing impeller Download PDFInfo
- Publication number
- CN201433904Y CN201433904Y CN2009200527300U CN200920052730U CN201433904Y CN 201433904 Y CN201433904 Y CN 201433904Y CN 2009200527300 U CN2009200527300 U CN 2009200527300U CN 200920052730 U CN200920052730 U CN 200920052730U CN 201433904 Y CN201433904 Y CN 201433904Y
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- impeller
- pump
- vertical punching
- punching press
- centrifugal pump
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- 238000004080 punching Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 210000004907 gland Anatomy 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 abstract 3
- 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 abstract 2
- 230000003068 static effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- 230000003116 impacting effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a vertical punching multilevel centrifugal pump, in particular to vertical punching multilevel centrifugal pump adopting a conical surface structure for fixing an impeller, comprising a pedestal, an impeller, an opening taper sleeve, a compaction nut, a pump body, an inflowing section, a middle section component, a tension rod, a pump cover, a pump shaft, a motor pedestal, a pressurization barrel, a coupler, a sealing pressure cover and an integrated mechanical sealing, wherein the pump shaft is a bared shaft, and the impeller is sleeved on the bared shaft; the opening taper sleeve is sleeved on the pump shaft to be inserted into the hole of the impeller hub; at last, the compaction nut is fixedly connected with the impeller hub the excircle of which is provided with a screw; the impeller and the pump shaft transmit the torsion by the static friction between the taper structure; the excircle conicity of the opening taper sleeve is identical with that of thehole of the impeller hub; the size of the inner hole of the opening taper sleeve is identical with that the pump shaft, and an interval matching is adopted; the tension rod is arranged between the middle section and the middle section; and the middle section is provided with a sliding bearing. The utility model is provided with four rubber compaction blocks for compacting the final stage middle section, thus increasing the pressing force between the middle sections; and the pump adopts an integrated mechanical sealing, thus facilitating the installation and replacement.
Description
Technical field:
The utility model relates to the pump series products, particularly a kind of fixedly vertical punching press multistage centrifugal pump of impeller of cone structure that adopts
Technical background:
The splined structure is adopted in the fixing and moment of torsion transmission on axle of existing vertical punching press multistage centrifugal pump, its impeller; There is following shortcoming in this structure: 1 because axle is gone up the roll extrusion spline or milling key groove becomes splined shaft, and manufacturing efficiency is very slow, and has weakened the rigidity of the intensity of axle.Wearing and tearing appear in the 2 this splined holes that often cause on the impeller that connect, and cause impeller to damage.3 upper splines are processed with roll die, and the roll die expense is higher, the processing of 4 usefulness method for milling, and manufacturing efficiency is low, increases the cost of product.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, a kind of fixedly vertical punching press multistage centrifugal pump of impeller of cone structure that adopts is provided, can guarantee that pump shaft and stage casing assembly have higher intensity and rigidity, improve the reliability of water pump operation, prolong the working life of water pump; Reduce the manufacturing and the loading and unloading difficulty of water pump, be convenient to safeguard, enhance productivity, reduce product cost.
The technical solution of the utility model is as follows:
A kind of fixedly vertical punching press multistage centrifugal pump of impeller of cone structure that adopts, it comprises base, impeller, opening circular cone ringfeder, gland nut, the pump housing, inlet segment, stage casing assembly, pull bar, pump cover, pump shaft, motor base, withstand voltage tube, coupling, sealing gland and integrated mechanical sealing; Pump shaft is an optical axis; Impeller comprises front shroud, back shroud, blade, wear ring and interior pore area cone structure and the screwed wheel hub of cylindrical; The conical surface in hole is consistent on the cylindrical tapering of opening circular cone ringfeder and the impeller hub, and the endoporus of opening circular cone ringfeder is consistent with the base dimension of pump shaft, and adopts Spielpassung; Withstand voltage tube inside is provided with multistage stage casing assembly and impeller, and multi-stage impeller independently is installed on the pump shaft successively, and is fixed on the pump shaft by opening circular cone ringfeder and gland nut, and lays respectively in the assembly of stage casing; Impeller and pump shaft are exactly that stiction by they and cone structure comes transmitting torque; Be provided with pull bar between stage casing assembly and the stage casing assembly; Pump shaft and impeller are rotated by a motoring; Impeller and stage casing assembly all are by punching press, welding fabrication; The stage casing assembly is provided with sliding bearing; Form an inner core after the assembled of stage casing, described withstand voltage tube forms double-shell structure with inner core; The pump housing is provided with water intake and water outlet, the internal communication of water intake and inner core, and the cavity between water outlet and inner core and the withstand voltage tube is communicated with; Four rubber compact heaps of the utility model design compress the final stage stage casing, increase the impacting force between stage casing and the stage casing; This pump adopts integrated mechanical sealing, is convenient to install and change.
Specifically, of the present utility model a kind of adopt cone structure fixedly the vertical punching press multistage centrifugal pump of impeller have the following advantages:
1. change the spline structure of pump shaft and impeller, provide a kind to adopt the fixedly vertical punching press multistage centrifugal pump of impeller of cone structure, increased the intensity of pump shaft and impeller effectively, thereby improved the quality of product, reduce the cost of product simultaneously.
2. the stage casing is provided with compound labyrinth seal structure, reduces backflow leakage, improves the hydraulic efficiency of pump, reduces user cost.
3. the stage casing assembly is provided with sliding bearing, makes pump more steady in operation process.
4. the pump housing is provided with sliding bearing, makes pump more steady in operation process.
5. the water intake of the pump housing and water outlet are respectively equipped with a movable adpting flange, make things convenient for connecting tube.
6. four rubber compact heaps are set, eliminate the influence of other part's machining errors, and compress the final stage stage casing, increase the impacting force between stage casing assembly and the stage casing assembly, stop the liquid at high pressure place to reflux, reduce the volumetric loss of pump, improve the hydraulic efficiency of pump to the low pressure place.
7. pull bar is set, increases the impacting force between stage casing assembly and the stage casing assembly, stop the liquid at high pressure place to reflux, reduce the volumetric loss of pump, improve the hydraulic efficiency of pump to the low pressure place.
8. integrated mechanical sealing is set, easily installs, easily change, favorable sealing property, the life-span is long.
9. the sealing part of the pump housing and withstand voltage tube, pump cover and withstand voltage tube adopts the radial seal of O-ring seals, and pressure is big more, good seal performance, and O-ring seals is reusable.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is illustrated:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the structural representation after impeller and pump shaft are fixed
Fig. 3 is the structural representation of impeller
Fig. 4 is the structural representation of opening circular cone ringfeder
Fig. 5 is the structural representation of gland nut
Fig. 6 is the structural representation of stage casing assembly
Fig. 7 is the enlarged view (being the structural representation of compound labyrinth seal structure) of B view among Fig. 2
Embodiment:
A kind of fixedly vertical punching press multistage centrifugal pump of impeller of cone structure that adopts, it comprises base 1, impeller 7, opening circular cone ringfeder 11, gland nut 23, the pump housing 2, inlet segment 21, stage casing assembly 9, pull bar 6, pump cover 13, pump shaft 10, motor base 17, withstand voltage tube 8, sealing gland 16 and integrated mechanical sealing 15; Pump shaft 10 is an optical axis; Impeller 7 comprises front shroud 71, back shroud 72, blade 73, wear ring 74 and interior pore area cone structure and the screwed wheel hub 75 of cylindrical; The conical surface in hole is consistent on the cylindrical tapering of opening circular cone ringfeder 11 and the impeller hub, and the endoporus of opening circular cone ringfeder 11 is consistent with the base dimension of pump shaft 10, and adopts Spielpassung; Withstand voltage tube 8 inside are provided with multistage stage casing assembly 9 and impeller 7, and multi-stage impeller 7 independently is installed on the pump shaft 10 successively, and is fixed on the pump shaft 10 by opening circular cone ringfeder 11 and gland nut 23, and lays respectively in the stage casing assembly 9; Impeller 7 and pump shaft 10 are exactly that stiction by they and cone structure comes transmitting torque; Be provided with pull bar 6 between stage casing assembly 9 and the stage casing assembly 9; Pump shaft 10 and impeller 7 are by a motor 26 rotary driving; Impeller 7 and stage casing assembly 9 all are by punching press, welding fabrication; Stage casing assembly 9 is provided with sliding bearing 907; Assembly 9 assembling backs in stage casing form an inner core, and described withstand voltage tube 8 forms double-shell structure with inner core; The pump housing 2 is provided with water intake 201 and water outlet 202, the internal communication of water intake 201 and inner core, and the cavity between water outlet 202 and inner core and withstand voltage 8 is communicated with; Four rubber compact heaps 19 of the utility model design compress final stage stage casing 20, increase the impacting force between stage casing assembly 9 and the stage casing assembly 9; This pump adopts integrated mechanical sealing 15, is convenient to install and change.
During assembling impeller 7 is enclosed within on the optical axis 10, be enclosed within opening circular cone ringfeder 11 on the optical axis 10 and insert in the hole of impeller hub 75, at last gland nut 23 and the screwed wheel hub 75 of cylindrical are fastenedly connected, opening circular cone ringfeder 11 is pressed between wheel hub 75 and the optical axis 10.Impeller 7 and pump shaft 10 are exactly that stiction by they and cone structure comes transmitting torque.
During pump work, motor 26 drives pump shaft 10 and impeller 7 rotations by coupling 18, liquid enters impeller 7 through the water intake 201 of the pump housing 2, and liquid flows out through the outlet of impeller 7 and tangentially enters stage casing assembly 9, enters next stage impeller 7 through behind the guide vane 901.Guide vane 901 can effectively reduce resistance and impact force, has improved efficient.Stage casing assembly 9 is provided with compound labyrinth seal structure, effectively reduces backflow leakage, improves the hydraulic efficiency of pump.
Pump cover is provided with four rubber compact heaps 19, eliminates the influence of other part's machining errors, and compresses final stage stage casing 20, increase the impacting force between stage casing assembly 9 and the stage casing assembly 9, stop the liquid at high pressure place to reflux, reduce the volumetric loss of pump, improve the hydraulic efficiency of pump to the low pressure place.
Along with the increase of impeller 7 progression, the pressure that is transferred liquid also increases gradually, and the fluid pressure of the cavity between inner core and the withstand voltage tube 8 is greater than the fluid pressure of inner chamber.Between stage casing assembly 9 after the assembling and stage casing assembly 9, pull bar 6 is set, increases the impacting force between stage casing assembly 9 and the stage casing assembly 9, stop the liquid at high pressure place to reflux, reduce the volumetric loss of pump, improve the hydraulic efficiency of pump to the low pressure place.
At the infall of pump shaft 10, an integrated mechanical sealing 15 is set between the hyperbaric chamber and the external world promptly with pump cover 13.Pump cover 13 is inserted in pump shaft 10 with after base 1 is connected with integrated mechanical sealing 15, with the fixing integrated mechanical sealing 15 of sealing gland 16.The advantage that integrated mechanical sealing 15 is installed is: integrated mechanical sealing 15 is an overall structure, and rotating ring and stationary ring are not separated, the not influence of other accessory sizes during assembling, not fragile and difficult leakage; When maintenance and replacing mechanical seal, do not need whole pump is taken apart, only need take sealing gland 16 and coupling 18 apart, at the neutral gear place of motor shaft and pump shaft 10, can take out integrated mechanical sealing 15 integral body, convenient and swift.
The sealing part of the pump housing 2 and withstand voltage tube 8, pump cover 13 and withstand voltage tube 8 adopts the radial seal of O-ring seals 5, and pressure is big more, and sealability is good more; O-ring seals 5 is a general part, highly versatile; Easily installation and quick detachable, and O-ring seals 5 is reusable.
In sum, the utility model provide a kind of feasible process, rational in infrastructure, effect obviously, a kind of fixedly vertical punching press multistage centrifugal pump of impeller of cone structure that adopts of function admirable, be a kind of novelty, progress and new design with practicability.The above is concrete enforcement example of the present utility model and the know-why used, do not departing from the equivalence change that principle of the present utility model is done, when the effect that it produced is no more than the content that specification and accompanying drawing contain, all should be in scope of the present utility model, explanation hereby.
Claims (12)
1. one kind is adopted the fixedly vertical punching press multistage centrifugal pump of impeller of cone structure, it comprises base (1), impeller (7), opening circular cone ringfeder (11), gland nut (23), the pump housing (2), inlet segment (21), stage casing assembly (9), pull bar (6), pump cover (13), pump shaft (10), motor base (17), withstand voltage tube (8), coupling (18), sealing gland (16) and integrated mechanical sealing (15), it is characterized in that: pump shaft (10) is an optical axis, wheel hub (75) endoporus of impeller (7) is provided with the conical surface, the cylindrical tapering of opening circular cone ringfeder (11) is consistent with the tapering that wheel hub (75) is gone up the hole, the endoporus of opening circular cone ringfeder (11) is consistent with the base dimension of pump shaft (10), and adopts Spielpassung; Impeller (7) is enclosed within on the pump shaft (10), opening circular cone ringfeder (11) is enclosed within pump shaft (10) goes up and insert in the hole of impeller hub (75), at last gland nut (23) and the screwed wheel hub of cylindrical (75) are fastenedly connected.
2. according to the fixing vertical punching press multistage centrifugal pump of impeller of the described employing cone structure of claim 1, it is characterized in that: described impeller (7) is made up of front shroud (71), back shroud (72), blade (73), wear ring (74) and interior pore area tapering and the screwed wheel hub of cylindrical (75), described blade (73) is the import twisted blade, and described blades at different levels (73) are identical.
3. according to the fixing vertical punching press multistage centrifugal pump of impeller of the described employing cone structure of claim 1, it is characterized in that: the cylindrical tapering of described opening circular cone ringfeder (11) is consistent with the tapering that wheel hub (75) is gone up the hole, the endoporus of opening circular cone ringfeder (11) is consistent with the base dimension of pump shaft (10), and adopts Spielpassung.
4. according to the fixing vertical punching press multistage centrifugal pump of impeller of the described employing cone structure of claim 1, it is characterized in that: the inside of described stage casing assembly (9) is provided with guide vane (901), inner support (902), upper bracket (903), lower support frame (904), bearing support (906), sliding bearing (907), fixed block (908), seal ring (909), neck ring (910), upper cavity (911), lower chamber (912); Described fixed block (908), seal ring (909), neck ring (910) are formed a compound labyrinth seal structure with impeller abrasion-proof ring (74) and front shroud (71).
5. according to the fixing vertical punching press multistage centrifugal pump of impeller of the described employing cone structure of claim 1, it is characterized in that: the described pump housing (2) is provided with water intake (201) and water outlet (202), the internal communication of water intake (201) and inner core, water outlet (202) is communicated with cavity between inner core and withstand voltage (8).
6. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 5 described employing cone structures, it is characterized in that: the water intake (201) and the water outlet (202) of the described pump housing (2) are respectively equipped with a movable adpting flange.
7. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 5 described employing cone structures, it is characterized in that: the middle part of the described pump housing (2) is provided with a sliding bearing (3).
8. according to the fixing vertical punching press multistage centrifugal pump of impeller of the described employing cone structure of claim 1, it is characterized in that: the upper end of described withstand voltage tube (8) is equipped with a pump cover (13) and described motor base (17), described motor (26) is installed in the upper end of described motor base (17), and the lower end of described motor base (17) links together by screw rod and described base (1).
9. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 8 described employing cone structures, it is characterized in that: the middle part of described pump cover (13) is provided with a circular hole (131), one integrated mechanical sealing (15) passes this circular hole (131) and is placed on the described pump shaft (10), and described integrated mechanical sealing (15) is fixing by sealing gland (16); The upper end of described pump shaft (10) is passed described circular hole (131) and is linked together by the axle of coupling (18) with described motor (26).
10. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 8 described employing cone structures, it is characterized in that: the side of described pump cover (13) is provided with one or two exhaust ports, and described exhaust port is equipped with outlet valve (14).
11. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 8 described employing cone structures, it is characterized in that: the inside of described pump cover (13) is equipped with rubber compact heap (19) respectively on four angles.
12. according to the fixing vertical punching press multistage centrifugal pump of impeller of claim 1 or 5 or 8 described employing cone structures, it is characterized in that: the described pump housing (2) and withstand voltage tube (8), pump cover (13) and the sealing of withstand voltage tube (8) are provided with the O-ring seals (5) of radial seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200527300U CN201433904Y (en) | 2009-03-16 | 2009-03-16 | Vertical punching multilevel centrifugal pump adopting conical surface structure for fixing impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200527300U CN201433904Y (en) | 2009-03-16 | 2009-03-16 | Vertical punching multilevel centrifugal pump adopting conical surface structure for fixing impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201433904Y true CN201433904Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200527300U Expired - Lifetime CN201433904Y (en) | 2009-03-16 | 2009-03-16 | Vertical punching multilevel centrifugal pump adopting conical surface structure for fixing impeller |
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| CN (1) | CN201433904Y (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011737A (en) * | 2010-12-22 | 2011-04-13 | 重庆工商职业学院 | Mechanical automatic protective centrifugal pump |
| CN102116312A (en) * | 2011-03-09 | 2011-07-06 | 浙江新界泵业股份有限公司 | Impeller for centrifugal pump |
| CN102734179A (en) * | 2012-07-11 | 2012-10-17 | 四川简阳云海泵业有限公司 | Minitype multistage centrifugal pump |
| CN102748320A (en) * | 2012-07-13 | 2012-10-24 | 无锡太博泵业有限公司 | Vertical centrifugal pump base |
| CN104847700A (en) * | 2015-05-28 | 2015-08-19 | 浙江南元泵业有限公司 | Pump shaft position-changeable water incoming and outgoing body structure |
| CN104863901A (en) * | 2015-05-28 | 2015-08-26 | 浙江南元泵业有限公司 | Supporting structure of pump shaft locating-free inflow and outflow water body structure |
| KR101548972B1 (en) * | 2015-02-16 | 2015-09-01 | 주식회사 에스피케이 | Centrifugal pump |
| CN104963873A (en) * | 2015-07-06 | 2015-10-07 | 无锡市新久扬机械制造有限公司 | Vertical multi-stage pump capable of being mounted conveniently |
| CN106122105A (en) * | 2016-08-08 | 2016-11-16 | 浙江南元泵业有限公司 | Centrifugal pump water outlet guide vane structure and manufacture method thereof |
| CN106224285A (en) * | 2016-08-25 | 2016-12-14 | 浙江南元泵业有限公司 | Water pump core arrangement |
| CN106803396A (en) * | 2017-03-18 | 2017-06-06 | 佛山市三水区希望火炬教育科技有限公司 | A kind of special islands and reefs water purification supply-water pump model of teenager's research in defense-related science and technology |
| CN106927292A (en) * | 2015-12-29 | 2017-07-07 | 上海东冠纸业有限公司 | A kind of bobbin cutter paper feeding shaft device |
| CN107061347A (en) * | 2017-04-07 | 2017-08-18 | 兰州兰泵有限公司 | The impeller linking structure and its quick despatch method of a kind of centrifugal multistage pump multiple centrifugal pump |
| CN112761956A (en) * | 2021-01-25 | 2021-05-07 | 广东凌霄泵业股份有限公司 | Multi-stage pump with novel structure |
| CN115199554A (en) * | 2022-07-19 | 2022-10-18 | 上海凯泉泵业（集团）有限公司 | Vertical multi-stage pipeline type centrifugal pump |
| CN115289058A (en) * | 2022-08-17 | 2022-11-04 | 新界泵业(浙江)有限公司 | Radial support impeller |
-
2009
- 2009-03-16 CN CN2009200527300U patent/CN201433904Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011737A (en) * | 2010-12-22 | 2011-04-13 | 重庆工商职业学院 | Mechanical automatic protective centrifugal pump |
| CN102011737B (en) * | 2010-12-22 | 2013-09-18 | 重庆工商职业学院 | Mechanical automatic protective centrifugal pump |
| CN102116312A (en) * | 2011-03-09 | 2011-07-06 | 浙江新界泵业股份有限公司 | Impeller for centrifugal pump |
| CN102116312B (en) * | 2011-03-09 | 2012-10-17 | 浙江新界泵业股份有限公司 | Impeller for centrifugal pump |
| CN102734179A (en) * | 2012-07-11 | 2012-10-17 | 四川简阳云海泵业有限公司 | Minitype multistage centrifugal pump |
| CN102748320A (en) * | 2012-07-13 | 2012-10-24 | 无锡太博泵业有限公司 | Vertical centrifugal pump base |
| KR101548972B1 (en) * | 2015-02-16 | 2015-09-01 | 주식회사 에스피케이 | Centrifugal pump |
| CN104863901A (en) * | 2015-05-28 | 2015-08-26 | 浙江南元泵业有限公司 | Supporting structure of pump shaft locating-free inflow and outflow water body structure |
| CN104847700A (en) * | 2015-05-28 | 2015-08-19 | 浙江南元泵业有限公司 | Pump shaft position-changeable water incoming and outgoing body structure |
| CN104963873A (en) * | 2015-07-06 | 2015-10-07 | 无锡市新久扬机械制造有限公司 | Vertical multi-stage pump capable of being mounted conveniently |
| CN104963873B (en) * | 2015-07-06 | 2017-08-08 | 无锡市新久扬机械制造有限公司 | A kind of MODEL VERTICAL MULTISTAGE PUMP being easily installed |
| CN106927292A (en) * | 2015-12-29 | 2017-07-07 | 上海东冠纸业有限公司 | A kind of bobbin cutter paper feeding shaft device |
| CN106122105A (en) * | 2016-08-08 | 2016-11-16 | 浙江南元泵业有限公司 | Centrifugal pump water outlet guide vane structure and manufacture method thereof |
| CN106224285A (en) * | 2016-08-25 | 2016-12-14 | 浙江南元泵业有限公司 | Water pump core arrangement |
| CN106803396A (en) * | 2017-03-18 | 2017-06-06 | 佛山市三水区希望火炬教育科技有限公司 | A kind of special islands and reefs water purification supply-water pump model of teenager's research in defense-related science and technology |
| CN107061347A (en) * | 2017-04-07 | 2017-08-18 | 兰州兰泵有限公司 | The impeller linking structure and its quick despatch method of a kind of centrifugal multistage pump multiple centrifugal pump |
| CN112761956A (en) * | 2021-01-25 | 2021-05-07 | 广东凌霄泵业股份有限公司 | Multi-stage pump with novel structure |
| CN115199554A (en) * | 2022-07-19 | 2022-10-18 | 上海凯泉泵业（集团）有限公司 | Vertical multi-stage pipeline type centrifugal pump |
| CN115289058A (en) * | 2022-08-17 | 2022-11-04 | 新界泵业(浙江)有限公司 | Radial support impeller |
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