CN101624992A - Vertical centrifugal pump of hydraulic driven type - Google Patents
Vertical centrifugal pump of hydraulic driven type Download PDFInfo
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- CN101624992A CN101624992A CN200910095887A CN200910095887A CN101624992A CN 101624992 A CN101624992 A CN 101624992A CN 200910095887 A CN200910095887 A CN 200910095887A CN 200910095887 A CN200910095887 A CN 200910095887A CN 101624992 A CN101624992 A CN 101624992A
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- centrifugal pump
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- main shaft
- bearing support
- spiral case
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Abstract
The invention discloses a vertical centrifugal pump of a hydraulic driven type, comprising a pump component, a transmission component and a hydraulic driving component. The pump component comprises an impeller (1) and the like which are arranged in a spiral case (2); the transmission component comprises a main shaft (5) and a bearing seat (23) which is arranged above the spiral case (2) and is internally provided with a bearing connected with the main shaft (5); the main shaft (5) sequentially penetrates through the bearing seat (23) and the spiral case (2) and is connected with the impeller (1); a sealing piece is arranged between the main shaft (5) and the bearing seat (23); the hydraulic driving component comprises a hydraulic motor (7) which is respectively communicated with a high-pressure oil pipe (11) and a return oil cavity (9); and the main shaft (5) is connected with the hydraulic motor (7). The vertical centrifugal pump has the advantages of short pump shaft and high electric safety.
Description
Technical field
The present invention relates to a kind of centrifugal pump of fluid motor-driven, especially a kind of vertical chemical centrifugal pump of hydraulic driving with radial force self balancing, it is applicable to the discharge and the conveying of chemical liquid medium in the industries such as oil, chemical industry, boats and ships, papermaking.
Background technique
Industry such as petrochemical industry and papermaking adopts storage tank to store chemical product in a large number; At sea in the transportation process, large-scale chemical transport cargo ship also often utilizes the cargo hold of a plurality of big degree of depth, big volume to come the storage of hazardous chemical product.Above-mentioned chemical product needs to adopt chemical pump to realize the conveying of chemical product in the process of turnover storage tank or cargo hold, is mode the most commonly used and vertical deep-well pump is set on storage tank or cargo hold.
In traditional application process, vertical deep-well pump adopts motor driving mostly, adopts the structural type of major axis vertical submerged pump accordingly.Some were significantly not enough below this motor-driven vertical long shaft submerged pump existed in the hazardous chemical course of conveying: at first, adopt motor drive mode, make and have a large amount of electrical equipments on the deep-well pump, the light current that comprises motor-driven forceful electric power and control system, this brings bigger potential safety hazard undoubtedly for many inflammable and explosive chemical product; Secondly; adopt motor-driven deep-well pump; storage tank or cargo hold for the big degree of depth; have to adopt very long pump shaft (can reach 5～10 meters usually); the amount of deflection of major axis pump rotor is big, the less stable of rotor, and its rate of fault is higher relatively, and makes troubles to installation; therefore, long pump shaft brings hidden danger also for the safety reliability of this class motor driving deep-well pump.For hazardous chemical accumulating occasion, it is comparatively crucial for improving operational safety to solve above-mentioned two problems.
On the other hand, traditional vertical centrifugal pump adopts the worm frame of single outlet more, because the fluid pressure of each section is inhomogeneous in the spiral case, can produce uneven radial force on impeller.In the long application of pump shaft, this uneven responsive to axial force makes axle produce bigger degree of disturbing in axle head, causes the rapid wearing of seal ring and axle sleeve, and causes vibration easily.Even more serious is that for the pump shaft of rotation, radial force or alternate load, bigger radial force can make axle destroy because of tired, have a strong impact on the reliability and the physical life of deep-well pump.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of pump shaft weak point and has the vertical centrifugal pump of hydraulic driven type of electrical security, uses this centrifugal pump can ensure the safe transport of chemical product.
In order to solve the problems of the technologies described above, the invention provides a kind of vertical centrifugal pump of hydraulic driven type, comprise pump assembly, pump assembly comprises the impeller that is positioned at spiral case, suction port links to each other with the inlet of spiral case; Be provided with the outlet of at least one on spiral case, outlet is connected with the medium discharge tube; Vertical centrifugal pump also comprises transmitting assemblies and hydraulic driving assembly;
Transmission part comprises main shaft and is positioned at the bearing support of spiral case top, is provided with the bearing that at least one links to each other with main shaft in bearing support, and main shaft links to each other with impeller after running through bearing support and spiral case successively; Be provided with Sealing between main shaft and the bearing support;
The hydraulic driving assembly comprises oil hydraulic motor, and high-pressure oil pipe and oil back chamber are connected with oil hydraulic motor respectively; Main shaft links to each other with oil hydraulic motor.
Improvement as vertical centrifugal pump of hydraulic driven type of the present invention: also be provided with the overrunning clutch that links to each other with main shaft in the bearing support.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: this centrifugal pump also comprises control unit, and control unit comprises the hydraulic control valve that is arranged on the high-pressure oil pipe.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: control unit also comprises stripping tube and is separately positioned on gas valve and stop valve on the medium discharge tube that stop valve is near the outlet of medium discharge tube; The two ends of stripping tube are connected with the medium discharge tube that is positioned at the stop valve both sides respectively.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: centrifugal pump also comprises black box, in comprising, establishes by black box the cofferdam of cavity and the mechanical sealing base that links to each other with the bearing support sealing and fixing, the cofferdam is sleeved on outside the mechanical sealing base, cofferdam and bearing support are fixedly linked hermetically, form cavity between the internal surface in cofferdam and the outer surface of mechanical sealing base, main shaft links to each other with impeller after running through bearing support, mechanical sealing base, cofferdam and spiral case respectively, the axle envelope is being set between main shaft and the mechanical sealing base, the lower shaft envelope is being set between main shaft and cofferdam.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: black box also comprises detecting tube and gas tube, and detecting tube and gas tube all are connected with cavity.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: high-pressure oil pipe and oil hydraulic motor all are positioned at oil back chamber, suit protecting jacket outside oil back chamber; Oil back chamber is connected with bearing support.
Further improvement as vertical centrifugal pump of hydraulic driven type of the present invention: spiral case is provided with 3 outlets, and the phase angle of these 3 outlets differs 120 °.
Vertical centrifugal pump of hydraulic driven type of the present invention from solving electrical security and the long problem of pump shaft, adopts oil hydraulic motor to drive the pump housing, and oil hydraulic motor and centrifugal pump body is designed to one just; The present invention has also designed the control unit that is used for operating hydraulically operated driven unit, thereby has realized not having electric driving and control; Adopt structure of the present invention, can also shorten the length of pump shaft greatly; Therefore, the present invention has the advantage that rotor stability is strong, safety reliability is good, helps the safe transport of chemical product.
Vertical centrifugal pump of hydraulic driven type of the present invention also from reducing the angle of spiral case radial force to the axle effect, adopts the worm frame of three outlets, and radial force can autobalance when making pump work.
Vertical centrifugal pump of hydraulic driven type of the present invention, also designed a kind of special seal leakage test mode, can derive to reveal thing and make and reveal thing away from being transmitted medium, judge and reveal the position that takes place, thereby avoid electrical equipment such as employing sensor by analyzing the leakage thing of deriving; Can further ensure the Security of use like this.
In sum, vertical centrifugal pump of hydraulic driven type of the present invention has stable drive, be easy to install, be easy to characteristics such as chemical product cleaning and sealingly secure reliability be good, can satisfy the specific (special) requirements of the chemical product in suction storage tank or the cargo hold.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the sectional structure schematic representation (because the drawing restriction is divided into two-part up and down) of vertical centrifugal pump of hydraulic driven type of the present invention;
Fig. 2 is that the master of the last trim ring 20 of axle among Fig. 1 looks schematic representation;
Fig. 3 is the A-A cross-sectional schematic of Fig. 2.
Embodiment
Fig. 1～Fig. 3 comprises pump assembly, transmitting assemblies, hydraulic driving assembly, control unit, black box and cap with splash guard and protective in conjunction with having provided a kind of vertical centrifugal pump of hydraulic driven type.
Cap with splash guard and protective is made up of the top platform of laying successively from top to bottom 12, platform 19 and bottom positioning pedestal 26.
Pump assembly comprises the impeller 1 that is positioned at spiral case 2, and the inlet of spiral case 2 is positioned at the bottom position place of spiral case 2, and suction port 27 is fixedly linked with the inlet of spiral case 2.Spiral case 2 adopts 3 uniform export structures, promptly is provided with 3 outlets on spiral case 2, and the phase angle between these 3 outlets differs 120 °, and above-mentioned 3 outlets medium exhaust outlet 181 by separately respectively are connected with medium discharge tube 18.
The purpose of above-mentioned 3 outlet designs is: because the fluid pressure of each section is inhomogeneous in the spiral case 2, can produce radial force on impeller 1; The design of the spiral case 2 of above-mentioned 3 exit types, radial force autobalance in the time of making pump work.Simultaneously, it is more stable, stressed more even to adopt three outlet volutes to compare two outlet volute structures.
Transmission part comprises main shaft 5, also comprises the bearing support 23 that is positioned at spiral case 2 tops, and bearing support 23 is fixedly linked with platform 19, and spiral case 2 is fixedly linked with bearing support 23.Be provided with trim ring 20 on the axle, upper bearing (metal) 21, overrunning clutch 22 and lower bearing 24 in bearing support 23 from top to bottom successively, trim ring 20 is used for the axially locating of upper bearing (metal) 21 on the axle.The top of main shaft 5 is provided with the shaft shoulder 51, is provided with Upper shaft sleeve 52 and Lower shaft sleeve 53 from top to bottom successively at the outer surface of main shaft 5, and Lower shaft sleeve 53 can adopt silicon nitride or thyrite to make.The shaft shoulder 51 passes last trim ring 20 back and links to each other with upper bearing (metal) 21; Upper shaft sleeve 52 links to each other with lower bearing 24 with overrunning clutch 22 from top to bottom successively.Since Upper shaft sleeve 52 be with the inner ring of overrunning clutch 22 by key joint, and the outer ring of overrunning clutch 22 and bearing support 23 pass through key joint; Therefore overrunning clutch 22 can realize preventing the effect of main shaft 5 counter-rotatings.
Establish the cofferdam 25 and the mechanical sealing base 29 of cavity in black box comprises, mechanical sealing base 29 is positioned at the below of bearing support 23, and mechanical sealing base 29 is fixedly linked hermetically with bearing support 23; Cofferdam 25 is sleeved on outside the mechanical sealing base 29, and cofferdam 25 is fixedly linked hermetically with bearing support 23, forms cavity 28 between the outer surface of the internal surface in cofferdam 25 and mechanical sealing base 29.The main shaft 5 that has Upper shaft sleeve 52 and Lower shaft sleeve 53 passes bearing support 23, mechanical sealing base 29, cofferdam 25 and spiral case 2 backs successively and links to each other with impeller 1.Axle envelope 4 is set, lower shaft envelope 3 between Lower shaft sleeve 53 and cofferdam 25 settings between Upper shaft sleeve 52 and mechanical sealing base 29.Upward axle envelope 4 and lower shaft envelope 3 can adopt the bone RunddichtringO, for example expose framework lip-shaped sealing ring for GB9877.1-88 FB type.
On the axle trim ring 20 as shown in Figures 2 and 3 unobstructed because hydraulic oil will flow in the bearing support 23 as lubricant oil by the gap between bearing support 23 and the upper bearing (metal) 21, so several small through hole 201 are offered in the side of trim ring 20 on axle for lubricant oil is flowed.
The hydraulic driving assembly comprises oil hydraulic motor 7, high-pressure oil pipe 11 and oil back chamber 9; Oil hydraulic motor 7 is installed on the platform 19, and the shaft shoulder 51 links to each other with oil hydraulic motor 7.High-pressure oil pipe 11 and oil hydraulic motor 7 all are positioned at oil back chamber 9, the protecting jacket 10 that shields at oil back chamber 9 outside suits.High-pressure oil pipe 11 is connected with the import of oil hydraulic motor 7, and oil back chamber 9 is connected with the outlet of oil hydraulic motor 7; Therefore the hydraulic oil that flows out from oil hydraulic motor 7 carries out the oil return collection by oil back chamber 9.Be provided with passage 192 on platform 19, oil back chamber 9 is by the intracavity inter-connection of passage 192 with bearing support 23; Like this, the hydraulic oil in the oil back chamber 9 can flow to bearing support 23 interior lubricant oil as upper bearing (metal) 21, overrunning clutch 22 and lower bearing 24 etc.
Control unit comprises the hydraulic control valve 14 that is installed on the top platform 12 and comprises gas valve 16 and stop valve 15; Hydraulic control valve 14 is arranged on the high-pressure oil pipe 11, is used to control the pressure and the flow of hydraulic oil, and then the output torque and the rotating speed of control oil hydraulic motor 7.Flow direction according to medium on medium discharge tube 18 is respectively equipped with gas valve 16 and stop valve 15, and promptly stop valve 15 is near the outlet 182 of medium discharge tube 18.The outlet end of stripping tube 17 links to each other with the outlet 182 (being positioned at the rear side of stop valve 15) of medium discharge tube 18, and the import of the entrance point of stripping tube 17 and medium discharge tube 18 (being medium exhaust outlet 181 and the joint of medium discharge tube 18) links to each other; Be provided with stop valve 171 on stripping tube 17, this stop valve 171 is used to control the switch of stripping tube 17.Detecting tube 8 is connected with cavity 28.Suction port 13 also has been installed on top platform 12; form passage 30 between the internal surface of the outer surface of oil back chamber 9 and protecting jacket 10; on platform 19, be provided with small through hole 191, be provided with small through hole 231, the shaft axis overlaid of small through hole 191 and small through hole 231 at the top of bearing support 23.Because during real work, vertical centrifugal pump of hydraulic driven type of the present invention will immerse and be transmitted in the medium,, therefore between the top of platform 19 and bearing support 23, O-ring seals is set in order to prevent that being transmitted medium enters in small through hole 191 and the small through hole 231.Be provided with small through hole 232 in the bottom of bearing support 23, sleeved 6 at bearing support 23 overcoats, so form air-flow path 31 between the outer surface of the internal surface of sleeve 6 and bearing support 23.Suction port 13, passage 30, small through hole 191, small through hole 231, air-flow path 31, small through hole 232 and cavity 28 are connected successively.Therefore, the gas that is fed by suction port 13 finally enters in the cavity 28 by passage 30, small through hole 191, small through hole 231, air-flow path 31, small through hole 232 successively, is used for the small amount of leakage liquid runs down detecting tube 8 of cavity 28 is blown out.
During vertical centrifugal pump of hydraulic driven type real work of the present invention, be example with the large-scale storage tank, top platform 12 is installed in the top of storage tank, and platform 19 is installed in the middle part of storage tank, and bottom positioning pedestal 26 is installed in the bottom of storage tank; Bottom positioning pedestal 26 only play the guiding role when centrifugal pump is installed, and makes spiral case 2 be positioned at bottom positioning pedestal 26.
Concrete action is as follows:
Drive oil hydraulic motor 7 rotations from the hydraulic oil of hydraulic station output by high-pressure oil pipe 11, and further rotate by the shaft shoulder 51 and main shaft 5 impeller 1 successively.Under action of centrifugal force, be transmitted medium and enter in the spiral case 2 from suction port 27, each outlet from spiral case 2 gathers to medium discharge tube 18 by corresponding medium exhaust outlet 181 then, and finally the outlet 182 from medium discharge tube 18 is discharged from.The oil return of flowing out in the oil hydraulic motor 7 is collected by oil back chamber 9, and the pressure of hydraulic oil and flow are controlled by hydraulic control valve 14, thereby correspondingly controls the output torque and the rotating speed of oil hydraulic motor 7.
Under the normal working, the stop valve 15 on the medium discharge tube 18 is opened, gas valve 16 cuts out, and the stop valve 171 on the stripping tube 17 is closed; Impeller 1 is discharged the medium that is transmitted in the storage tank by oil hydraulic motor 7 rotary driving by medium discharge tube 18 at this moment.
After being transmitted medium and finding time in the storage tank, enter gas and carry the stage.Close stop valve 15, open stop valve 171, feed gas, medium residual in the medium discharge tube 18 is discharged by stripping tube 17 from gas valve 16.At this moment, the impeller 1 of pump low speed rotation under the drive of oil hydraulic motor 7 plays the effect that stops medium back flow.
Hydraulic oil in the oil back chamber 9 enters the inner chamber of bearing support 23 by passage 192, as the lubricant oil of upper bearing (metal) 21, overrunning clutch 22 and lower bearing 24 etc.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (8)
1, a kind of vertical centrifugal pump of hydraulic driven type comprises pump assembly, and described pump assembly comprises the impeller (1) that is positioned at spiral case (2), and suction port (27) links to each other with the inlet of spiral case (2); Be provided with the outlet of at least one on spiral case (2), described outlet is connected with medium discharge tube (18); It is characterized in that: vertical centrifugal pump also comprises transmitting assemblies and hydraulic driving assembly;
Transmission part comprises main shaft (5) and is positioned at the bearing support (23) of spiral case (2) top, be provided with the bearing that at least one links to each other with main shaft (5) in described bearing support (23), described main shaft (5) runs through bearing support (23) successively and links to each other with impeller (1) with spiral case (2) back; Be provided with Sealing between main shaft (5) and the bearing support (23);
The hydraulic driving assembly comprises oil hydraulic motor (7), and high-pressure oil pipe (11) and oil back chamber (9) are connected with oil hydraulic motor (7) respectively; Main shaft (5) links to each other with oil hydraulic motor (7).
2, vertical centrifugal pump of hydraulic driven type according to claim 1 is characterized in that: also be provided with the overrunning clutch (22) that links to each other with main shaft (5) in the described bearing support (23).
3, vertical centrifugal pump of hydraulic driven type according to claim 1 and 2 is characterized in that: described centrifugal pump also comprises control unit, and described control unit comprises the hydraulic control valve (14) that is arranged on the high-pressure oil pipe (11).
4, vertical centrifugal pump of hydraulic driven type according to claim 3, it is characterized in that: described control unit also comprises stripping tube (17) and is separately positioned on gas valve (16) and stop valve (15) on the medium discharge tube (18) that described stop valve (15) is near the outlet (182) of medium discharge tube (18); The two ends of described stripping tube (17) are connected with the medium discharge tube (18) that is positioned at stop valve (15) both sides respectively.
5, vertical centrifugal pump of hydraulic driven type according to claim 4 is characterized in that: described centrifugal pump also comprises black box; In comprising, establishes by described black box the cofferdam (25) of cavity and the mechanical sealing base (29) that links to each other with bearing support (23) sealing and fixing, described cofferdam (25) is sleeved on outside the mechanical sealing base (29), cofferdam (25) is fixedly linked hermetically with bearing support (23), form cavity (28) between the outer surface of the internal surface in cofferdam (25) and mechanical sealing base (29), main shaft (5) runs through bearing support (23) respectively, mechanical sealing base (29), cofferdam (25) links to each other with impeller (1) with spiral case (2) back, axle envelope (4) is set between main shaft (5) and mechanical sealing base (29), lower shaft envelope (3) is set between main shaft (5) and cofferdam (25).
6, vertical centrifugal pump of hydraulic driven type according to claim 5 is characterized in that: described black box also comprises detecting tube (8) and gas tube (13), and described detecting tube (8) and gas tube (13) all are connected with cavity (28).
7, vertical centrifugal pump of hydraulic driven type according to claim 6 is characterized in that: described high-pressure oil pipe (11) and oil hydraulic motor (7) all are positioned at oil back chamber (9), suit protecting jacket (10) outside oil back chamber (9); Oil back chamber (9) is connected with bearing support (23).
8, vertical centrifugal pump of hydraulic driven type according to claim 7 is characterized in that: described spiral case (2) is provided with 3 outlets, and the phase angle of described 3 outlets differs 120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100958876A CN101624992B (en) | 2009-02-17 | 2009-02-17 | Vertical centrifugal pump of hydraulic driven type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100958876A CN101624992B (en) | 2009-02-17 | 2009-02-17 | Vertical centrifugal pump of hydraulic driven type |
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| CN101624992A true CN101624992A (en) | 2010-01-13 |
| CN101624992B CN101624992B (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100958876A Expired - Fee Related CN101624992B (en) | 2009-02-17 | 2009-02-17 | Vertical centrifugal pump of hydraulic driven type |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102330692A (en) * | 2011-09-28 | 2012-01-25 | 福建侨龙专用汽车有限公司 | Built-in replaceable hydraulic motor water pump |
| CN102434465A (en) * | 2011-12-23 | 2012-05-02 | 大连绿鑫泵业有限公司 | Auger cutting type hydraulic driven pump |
| CN102536834A (en) * | 2010-12-20 | 2012-07-04 | 黄工机械集团有限公司 | Single-stage double-suction and double-outlet deep well pump |
| CN103437974A (en) * | 2013-07-23 | 2013-12-11 | 武汉船用机械有限责任公司 | Power transmission device for immersed pump and power transmission tube thereof |
| CN104141618A (en) * | 2014-08-20 | 2014-11-12 | 中国船舶重工集团公司第七0四研究所 | Decoupling testing device for centrifugal pump |
| CN106799985A (en) * | 2017-01-24 | 2017-06-06 | 南京南汽畅通公路机械有限公司 | A kind of hydraulic power drainage system for water drainage car of meeting an urgent need |
| CN108131297A (en) * | 2017-10-31 | 2018-06-08 | 武汉船用机械有限责任公司 | A kind of immersed pump |
| CN109654028A (en) * | 2018-10-30 | 2019-04-19 | 武汉船用机械有限责任公司 | A kind of portable centrifugal pump |
| CN109681439A (en) * | 2019-01-31 | 2019-04-26 | 长沙矿冶研究院有限责任公司 | A kind of deep water water pump with pressure compensation |
| CN111255699A (en) * | 2020-01-17 | 2020-06-09 | 苏州优德通力科技有限公司 | Manual-automatic integrated self-adaptive pump with infrared water level detection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102536834A (en) * | 2010-12-20 | 2012-07-04 | 黄工机械集团有限公司 | Single-stage double-suction and double-outlet deep well pump |
| CN102330692A (en) * | 2011-09-28 | 2012-01-25 | 福建侨龙专用汽车有限公司 | Built-in replaceable hydraulic motor water pump |
| CN102434465A (en) * | 2011-12-23 | 2012-05-02 | 大连绿鑫泵业有限公司 | Auger cutting type hydraulic driven pump |
| CN103437974A (en) * | 2013-07-23 | 2013-12-11 | 武汉船用机械有限责任公司 | Power transmission device for immersed pump and power transmission tube thereof |
| CN103437974B (en) * | 2013-07-23 | 2016-01-20 | 武汉船用机械有限责任公司 | A kind of immersed pump power transmission and power transmission pipe thereof |
| CN104141618A (en) * | 2014-08-20 | 2014-11-12 | 中国船舶重工集团公司第七0四研究所 | Decoupling testing device for centrifugal pump |
| CN104141618B (en) * | 2014-08-20 | 2016-04-13 | 中国船舶重工集团公司第七0四研究所 | The decoupling zero testing apparatus of centrifugal pump |
| CN106799985A (en) * | 2017-01-24 | 2017-06-06 | 南京南汽畅通公路机械有限公司 | A kind of hydraulic power drainage system for water drainage car of meeting an urgent need |
| CN108131297A (en) * | 2017-10-31 | 2018-06-08 | 武汉船用机械有限责任公司 | A kind of immersed pump |
| CN108131297B (en) * | 2017-10-31 | 2020-09-22 | 武汉船用机械有限责任公司 | Immersed pump |
| CN109654028A (en) * | 2018-10-30 | 2019-04-19 | 武汉船用机械有限责任公司 | A kind of portable centrifugal pump |
| CN109681439A (en) * | 2019-01-31 | 2019-04-26 | 长沙矿冶研究院有限责任公司 | A kind of deep water water pump with pressure compensation |
| CN109681439B (en) * | 2019-01-31 | 2024-03-22 | 长沙矿冶研究院有限责任公司 | Deepwater pump with pressure compensation function |
| CN111255699A (en) * | 2020-01-17 | 2020-06-09 | 苏州优德通力科技有限公司 | Manual-automatic integrated self-adaptive pump with infrared water level detection function |
| WO2021142918A1 (en) * | 2020-01-17 | 2021-07-22 | 苏州优德通力科技有限公司 | Manual-automatic integrated self-adaptive pump having infrared water level detection function |
| US11639721B2 (en) | 2020-01-17 | 2023-05-02 | Gp Enterprises Co., Ltd. | Manual-automatic integrated self-adaptive pump with infrared water level detection function |
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| CN101624992B (en) | 2011-01-05 |
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Application publication date: 20100113 Assignee: Huanggong Machinery Group Assignor: Zhejiang University Contract record no.: 2014330000446 Denomination of invention: Vertical centrifugal pump of hydraulic driven type Granted publication date: 20110105 License type: Exclusive License Record date: 20141230 |
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Granted publication date: 20110105 Termination date: 20160217 |