CN113339324B - Pump device for draining and transferring water through two-way flow channels and design method - Google Patents
Pump device for draining and transferring water through two-way flow channels and design method Download PDFInfo
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- CN113339324B CN113339324B CN202110763139.1A CN202110763139A CN113339324B CN 113339324 B CN113339324 B CN 113339324B CN 202110763139 A CN202110763139 A CN 202110763139A CN 113339324 B CN113339324 B CN 113339324B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 57
- 238000009792 diffusion process Methods 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 230000010349 pulsation Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/566—Fluid-guiding means, e.g. diffusers adjustable specially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow pumps
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a pump device for drainage and water transfer of a bidirectional runner and a design method. The water pump comprises a bidirectional water inlet flow passage, a bidirectional water outlet flow passage, a first control gate, a second control gate, a third control gate and a fourth control gate which are arranged at the bidirectional water inlet flow passage and the bidirectional water outlet flow passage, and further comprises a movable elbow pipe, a pump section, an upper cover and a pump shaft, wherein the pump section is arranged between the bidirectional water inlet flow passage and the bidirectional water outlet flow passage, the pump shaft is positioned at the center of the pump section, the upper cover is positioned above the bidirectional water outlet flow passage, the top of the pump shaft extends out of the upper cover, one end of the movable elbow pipe is connected with the pump section, the other end of the movable elbow pipe is provided with a bidirectional water outlet flow passage outlet, and the movable elbow pipe can rotate around the pump shaft by 180 degrees in a water pump well, so that the direction of the elbow pipe outlet always faces the opening side of the control gate in the water outlet flow passage. The invention overcomes the defects of large hydraulic loss, large hydraulic pulsation and the like in the prior bidirectional flow channel pump device.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering pumps, and particularly relates to a pump device for draining and transferring water through a bidirectional runner and a design method.
Background
The bidirectional runner pump station bears the dual functions of diversion irrigation and drainage in the coastal lake area. Through 4 gates of control two-way runner, advance water from arbitrary side of both sides respectively, carry to arrange through the water pump, then go out water from arbitrary side of both sides, still can utilize upper strata or lower floor to carry out the gravity drainage and irrigation (patent number 02286342.7, patent number 201210561707.0) when not needing the water pump to carry water, have one station multi-purpose, take up an area of little, investment saving, simple structure, construction installation maintenance advantage such as convenient, obtained more and more extensive application.
However, the hydraulic loss of the water outlet flow channel caused by the current bidirectional flow channel structure is very large, so that the efficiency of the whole pump device is very low, and the further popularization and application of the flow channel form are prevented. The adopted bidirectional water outlet flow passage forms are all part of recovery of kinetic energy by adopting a diffusion horn pipe matched with a water guide cone, so that part of kinetic energy is converted into pressure energy, then water flow enters a water outlet pressure box culvert after the flow speed is reduced to a certain degree, and the pressure box culvert has no kinetic energy recovery function. The height and the diameter of the diffusion horn pipe and the water guide cone of the bidirectional water outlet flow channel are limited by the height and the width of the flow channel, so that the water flow diffusion space of the part is limited, the water flow cannot be diffused gradually, the equivalent diffusion angle is large, the hydraulic loss is large, and the efficiency of the whole pump device cannot be effectively improved.
Meanwhile, due to uneven flow velocity distribution caused by the existing bidirectional flow passage structural form, the pressure of the bidirectional water outlet flow passage at the closing side of the gate is larger than that at the opening side of the gate, so that the water guide cone, the water pump shaft and the like bear the action of unbalanced surrounding pulsating pressure during operation, and the phenomenon of eccentric wear of the guide bearing and the filler can be caused under the action, so that the stable and efficient operation of the unit is seriously influenced. Due to the defects of the prior bidirectional flow channel pump station, the further popularization and application of the bidirectional flow channel pump station are limited, so that the bidirectional flow channel device is rarely adopted in the important water conservancy junction pump station needing long-term operation at present. Therefore, the current bidirectional flow channel form can not be widely popularized and applied at all.
Disclosure of Invention
The invention aims to overcome the defects existing in the prior two-way runner pump device, keep the functions of a two-way runner unchanged, and provide a pump device structure for draining and regulating water of the two-way runner and a design method. The bidirectional water outlet flow passage adopts a movable elbow, the elbow can rotate 180 degrees, and the direction of the elbow is adjusted according to the outflow direction required by water flow. The flow channel molded lines are designed by adopting the unidirectional flow channels, so that the hydraulic loss of the flow channels is small, and the efficiency of the pump device can be improved to a great extent. Meanwhile, the pressure distribution in the flow channel is uniform, and the running stability of the pump device can be improved.
The technical scheme adopted by the invention is as follows: the pump device for draining and water-regulating of the bidirectional runner comprises a bidirectional water inlet runner, a bidirectional water outlet runner, a first control gate, a second control gate, a third control gate and a fourth control gate which are arranged at the bidirectional water inlet runner and the bidirectional water outlet runner, a movable elbow pipe, a pump section, an upper cover and a pump shaft, wherein the pump section is arranged between the bidirectional water inlet runner and the bidirectional water outlet runner, the pump shaft is positioned in the center of the pump section, the upper cover is positioned above the bidirectional water outlet runner, the top of the pump shaft extends out of the upper cover, one end of the movable elbow pipe is connected with the pump section, the other end of the movable elbow pipe is provided with a bidirectional water outlet runner outlet, the movable elbow pipe can rotate 180 degrees around the pump shaft in a water pump well, the direction of the elbow pipe outlet always faces the opening side of the control gate in the water outlet runner, the movable elbow pipe is connected with the upper cover, a plurality of supports are fixed on the circumference of a flange of the upper cover, a through hole is reserved at the top of each support, and the movable handle passes through the through hole and is fixed on the support. And a jack is arranged on the lower seat ring flange of the upper cover at an interval of 90 degrees, the upper end of the jack is propped against a boss reserved on the upper cover flange, and an annular ball channel is arranged between the upper cover flange and the lower seat ring flange.
And the upper cover is provided with a manhole.
2 Brackets are fixed on the circumference of the flange of the upper cover at every 90-degree angle.
And a guide bearing and a stuffing box are arranged between the top of the pump shaft and the upper cover.
The rotating diameter of the movable bent pipe is D1-0.02m, wherein D1 is the diameter of a water pump well, and 0.02m is a reserved operation gap.
A design method of a water outlet flow passage flow-through line of a pump device for draining and regulating water in a bidirectional flow passage comprises the following steps:
the design geometric parameters of the water outlet flow passage comprise: flow Q, impeller diameter D, outlet channel inlet diameter D 0, channel outlet height H, channel outlet width B, lower arc radius R 1 of the elbow, upper arc radius R 2 of the elbow, transition radius ri of the elbow, section height H i, section width B i, section i to center line length L i of the channel inlet, section M to center line length L M of the channel inlet, section M height H M, section M width B M, each section line of the channel is perpendicular to the channel center line, the upper arc of the elbow is tangent to the upper edge line at P point, the lower arc of the elbow is tangent to the lower edge line at Q point, the above parameter units: m, wherein,
B＝2.4D
H＝Q/B
R1＝0.8D
R2＝1.2D
(1) Drawing an elevation view of the flow channel according to the parameters, wherein the upper arc of the bent pipe is tangent to the upper edge, the lower arc of the bent pipe is tangent to the lower edge, and the radius ri of the transition circle of each section accords with the linear change rule and ensures smooth transition;
(2) Uniformly distributing and making various flow-through sections along the central line of the flow channel on the flow channel profile elevation view, wherein each section line is perpendicular to the central line of the flow channel, and extracting geometric parameters of each section: calculating the section height hi, the section width bi and the center line length Li from the section i to the flow channel inlet according to the following mathematical relationship, and calculating the section width bi of each plane diagram according to the above parameter units: m:
(3) Checking equivalent diffusion angles between adjacent flow sections by using the following mathematical relationship to control the equivalent diffusion angles between the adjacent sections to be 8-12 DEG:
(4) And connecting the section molded lines after the optimization design by adopting a fitting curve, ensuring smooth transition, mirroring the designed water outlet flow passage molded lines by taking the pump shaft as a symmetry axis, and completing the design of the overcurrent type line of the bidirectional water outlet flow passage.
The beneficial effects of the invention are as follows:
(1) The pump device for draining and regulating water in the bidirectional runner adopts the movable bent pipe with the adjustable direction to change the outflow direction of water flow, and has the advantages of simple structure and good operability.
(2) The movable bent pipe is adopted to greatly prolong the diffusion space of water flow, effectively reduce the hydraulic loss of the water outlet flow channel and greatly improve the efficiency of the pump device. Meanwhile, the structure can effectively avoid hydraulic vibration in the flow channel, and greatly improve the running stability of the unit.
(3) The invention adopts equivalent diffusion angles between adjacent sections to control the change of each parameter, can effectively control the diffusion loss of water flow, and avoids blindness in the design process. Not only effectively expands the diffusion space of water flow, but also reduces the height of the flow channel and shortens the length of the pump shaft, thereby greatly saving the engineering cost. Therefore, the invention has the function of bidirectional flow passage and simultaneously has high efficiency and operation stability of the unidirectional flow passage pump device.
Drawings
FIG. 1 is a longitudinal cross-sectional view of a bi-directional flow pump apparatus of the present invention;
FIG. 2 is a perspective view of the direction A of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1 at I;
FIG. 4 is a longitudinal cross-sectional view of a bi-directional outlet flow passage of the present invention;
FIG. 5 is a plan view of a bi-directional outlet flow channel according to the present invention;
In the figure: the device comprises a first control gate 1, a second control gate 2, a third control gate 3, a fourth control gate 4, a bidirectional water inlet flow channel 5, a bidirectional water outlet flow channel 6, a movable elbow 7, a pump section 8, a guide bearing 9, a stuffing box 10, an upper cover 11, a bracket 12, a movable handle 13, a manhole 14, a jack 15, a boss 16, a ball channel 17, a pump shaft 18, a lower seat ring flange 19 and a fastening bolt 20.
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific examples, which are given for clarity of understanding and are not to be construed as limiting the invention.
As shown in fig. 1-5, the invention comprises a bidirectional water inlet channel 5, a bidirectional water outlet channel 6, a first control gate 1, a second control gate 2, a third control gate 3 and a fourth control gate 4 which are arranged at the bidirectional water inlet channel 5 and the bidirectional water outlet channel 6, a movable elbow 7, a pump section 8, an upper cover 11 and a pump shaft 18, wherein the pump section 8 is arranged between the bidirectional water inlet channel 5 and the bidirectional water outlet channel 6, the pump shaft 18 is positioned at the center of the pump section 8, the upper cover 11 is positioned above the bidirectional water outlet channel 6, the top of the pump shaft 18 extends out of the upper cover 11, one end of the movable elbow 7 is connected with the pump section 8, the other end of the movable elbow 7 is provided with a bidirectional water outlet channel 6, the direction of the elbow outlet always faces the opening side of the control gate in the water outlet channel, the movable elbow 7 is connected with the upper cover 11, a plurality of brackets 12 are fixed on the circumference of the flange of the upper cover 11, a through hole is reserved on the top of each bracket 12, and the movable handle 13 passes through the through hole to be fixed on the brackets 12; the jack 15 is arranged on the lower seat ring flange 19 of the upper cover 11 at intervals of 90 degrees, the upper end of the jack is propped against the boss 16 reserved on the upper cover flange, and a circular ball channel 17 is arranged between the upper cover flange and the lower seat ring flange 19. The upper cover 11 is provided with a manhole 14. 2 brackets 12 are fixed on the circumference of the flange of the upper cover 11 at intervals of 90 degrees. A guide bearing 9 and a stuffing box 10 are arranged between the top of the pump shaft 18 and the upper cover 11.
The bidirectional water inlet runner adopts the existing design method to determine the runner molded line. And determining the molded line of the bidirectional water outlet channel according to the following method.
Firstly, determining known design parameters including flow Q, impeller diameter D, outlet flow channel inlet diameter D 0, flow channel outlet height H and flow channel outlet width B, and then determining the flow channel outlet height H, flow channel outlet width B, arc radius R 1 under an elbow, arc radius R 2 on the elbow and transition radius R i of each section according to the following relation: m:
B＝2.4D
H＝Q/B
R1＝(0.6～0.9)D
R2＝(0.9～1.2)D
According to the parameters, an elevation view of the flow channel can be drawn, the upper arc of the bent pipe is tangent to the upper edge, the lower arc of the bent pipe is tangent to the lower edge, the radius r i of the transition circle of each section accords with the linear change rule, and smooth transition is ensured. Uniformly distributing and making various flow-through sections along the central line of the flow channel on the flow channel profile elevation view, wherein each section line is perpendicular to the central line of the flow channel, and extracting geometric parameters of each section: the section height h i, the section width b i and the section i to the center line length L i of the flow channel inlet are calculated according to the following mathematical relationship, the section width b i of the plan view is calculated according to the following parameter units: m:
Finally, checking the equivalent diffusion angle between the adjacent flow sections by using the following mathematical relationship, so that the equivalent diffusion angle between the adjacent sections is controlled to be 8-12 degrees, the hydraulic diffusion loss of the flow channel can be controlled to be smaller, and the geometric dimension of the flow channel can be ensured to have certain economical efficiency, so that the flow channel is not too long and too wide. If the following mathematical relationship is not met, the geometric dimensions need to be readjusted, and computer programming design can be adopted, so that the calculation workload can be greatly saved.
And finally, connecting the section molded lines after the optimal design by adopting a fitting curve, and ensuring smooth transition. And mirroring the designed water outlet flow channel molded line by taking the pump shaft as a symmetry axis, thus finishing the design of the flow passing type line of the bidirectional water outlet flow channel.
And carrying out structural design on the flow channel molded line after the optimization design. The rotating diameter of the movable elbow is determined to be (D 1 -0.02) m, wherein D 1 is the diameter of a water pump well, and 0.02m is a reserved operation gap. The movable elbow can rotate 180 degrees around the pump shaft in the water pump well, so that the direction of the outlet of the elbow always faces the opening side of the control gate in the water outlet flow channel.
The upper cover 11 of the middle-sized and small-sized pump station is connected with the lower seat ring flange 19 through fastening bolts, and the movable bent pipe can be connected and fastened with the flange surface of the guide vane body by adopting the fastening bolts 20 for the middle-sized and large-sized pump station so as to improve the stability of the structure.
During specific operation, the 4 first control gates-the fourth control gates (1, 2, 3 and 4) are closed firstly, and then accumulated water in the flow channel is pumped and discharged by utilizing the drainage pump of the pump station, so that the water level in the flow channel is reduced below the flange surface of the guide vane outlet. Then, each fastening bolt of the movable elbow is removed, and when the connecting bolts between the movable elbow and the guide vane body are removed, the connecting bolts need to enter the interior of the runner from the runner inlet 14. After all the fixing bolts are taken down, the upper cover 11 is slowly and vertically jacked up by 2-4 cm by adopting 4 jacks 15, and a plurality of balls with proper diameters and the same specification are uniformly distributed in the ball channel 17 for reducing friction resistance during rotation. Then slowly discharging force from 4 jacks simultaneously, dropping the upper cover 11, pushing the 4 movable handles 13 to adjust the turning direction of the movable bent pipe 7, jacking the upper cover 11 after the direction adjustment is completed, taking out the balls, then dropping the upper cover 11 and fixing, and tightening all fixing bolts to finish the turning operation of the movable bent pipe.
The design method of the bidirectional water outlet runner firstly carries out design according to the unidirectional runner, then mirrors the designed unidirectional runner, the middle bent pipe adopts the movable bent pipe, and finally, the high efficiency and the stability of the unidirectional runner can be achieved, and the function of the bidirectional runner can be realized. The design method of the invention effectively reduces the hydraulic loss of the flow channel, has definite design target, is reasonable and feasible, and is more beneficial to adopting programmed design in combination with a computer. The structure design is simple and reliable, the operability is strong, the function of the bidirectional flow channel is better realized by matching with the flow channel design, and the operation benefit and the operation reliability of the pump station are improved.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (2)
1. The utility model provides a pump device for water transfer is transferred in two-way runner drainage, includes two-way runner (5), two-way runner (6), sets up in two-way runner (5), two-way runner (6) department's first control gate (1), second control gate (2), third control gate (3) and fourth control gate (4), its characterized in that: the water pump further comprises a movable elbow (7), a pump section (8), an upper cover (11) and a pump shaft (18), wherein the pump section (8) is arranged between the bidirectional water inlet flow channel (5) and the bidirectional water outlet flow channel (6), the pump shaft (18) is positioned at the center of the pump section (8), the upper cover (11) is positioned above the bidirectional water outlet flow channel (6), the top of the pump shaft (18) extends out of the upper cover (11), one end of the movable elbow (7) is connected with the pump section (8), the other end of the movable elbow is provided with a bidirectional water outlet flow channel (6) outlet, the movable elbow (7) can rotate around the pump shaft (18) by 180 degrees in a water pump well, the direction of the elbow outlet always faces the opening side of a control gate in the water outlet flow channel, the movable elbow (7) is connected with the upper cover (11), a plurality of brackets (12) are fixed on the circumference of a flange of the upper cover (11), a through hole is reserved at the top of each bracket (12), and a movable handle (13) is fixed on the bracket (12) through the through hole; a jack (15) is arranged on a lower seat ring flange (19) of the upper cover (11) at an interval of 90 degrees, the upper end of the jack is propped against a boss (16) reserved on the upper cover flange, and a circular ball channel (17) is arranged between the upper cover flange and the lower seat ring flange (19);
A manhole (14) is formed in the upper cover (11);
2 brackets (12) are fixed on the circumference of the flange of the upper cover (11) at intervals of 90 degrees;
a guide bearing (9) and a stuffing box (10) are arranged between the top of the pump shaft (18) and the upper cover (11);
the rotating diameter of the movable elbow pipe (7) is D1-0.02m, wherein D1 is the diameter of a water pump well, and 0.02m is a reserved operation gap.
2. The method for designing the outflow channel overcurrent type line of the pump device for draining and regulating water through the bidirectional flow channels according to claim 1, wherein the method comprises the following steps of: the method comprises the following steps:
the design geometric parameters of the water outlet flow passage comprise: flow Q, impeller diameter D, outlet channel inlet diameter D 0, channel outlet height H, channel outlet width B, lower arc radius R 1 of the elbow, upper arc radius R 2 of the elbow, transition radius ri of the elbow, section height H i, section width B i, section i to center line length L i of the channel inlet, section M to center line length L M of the channel inlet, section M height H M, section M width B M, each section line of the channel is perpendicular to the channel center line, the upper arc of the elbow is tangent to the upper edge line at P point, the lower arc of the elbow is tangent to the lower edge line at Q point, the above parameter units: m, wherein,
B＝2.4D
H＝Q/B
R1＝0.8D
R2＝1.2D
(1) Drawing an elevation view of the flow channel according to the parameters, wherein the upper arc of the bent pipe is tangent to the upper edge, the lower arc of the bent pipe is tangent to the lower edge, and the radius ri of the transition circle of each section accords with the linear change rule and ensures smooth transition;
(2) Uniformly distributing and making various flow-through sections along the central line of the flow channel on the flow channel profile elevation view, wherein each section line is perpendicular to the central line of the flow channel, and extracting geometric parameters of each section: calculating the section height hi, the section width bi and the center line length Li from the section i to the flow channel inlet according to the following mathematical relationship, and calculating the section width bi of each plane diagram according to the above parameter units: m:
(3) Checking equivalent diffusion angles between adjacent flow sections by using the following mathematical relationship to control the equivalent diffusion angles between the adjacent sections to be 8-12 DEG:
(4) And connecting the section molded lines after the optimization design by adopting a fitting curve, ensuring smooth transition, mirroring the designed water outlet flow passage molded lines by taking the pump shaft as a symmetry axis, and completing the design of the overcurrent type line of the bidirectional water outlet flow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110763139.1A CN113339324B (en) | 2021-07-06 | 2021-07-06 | Pump device for draining and transferring water through two-way flow channels and design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110763139.1A CN113339324B (en) | 2021-07-06 | 2021-07-06 | Pump device for draining and transferring water through two-way flow channels and design method |
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| CN113339324A CN113339324A (en) | 2021-09-03 |
| CN113339324B true CN113339324B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110763139.1A Active CN113339324B (en) | 2021-07-06 | 2021-07-06 | Pump device for draining and transferring water through two-way flow channels and design method |
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| CN114151360A (en) * | 2021-12-16 | 2022-03-08 | 合肥恒大江海泵业股份有限公司 | Submersible pump station structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597200A (en) * | 1945-08-22 | 1948-01-20 | B F Sturtevant Co | Improvements relating to the air cooling of heat exchange surfaces in moving vehicles |
| CA2418230A1 (en) * | 2002-01-29 | 2003-07-29 | Snecma Moteurs | Blade control device with variable blade angle and pinch attachment |
| CN103911972A (en) * | 2012-12-28 | 2014-07-09 | 广东河海泵业机械有限公司 | Novel flap valve control system |
| CN206667365U (en) * | 2017-03-22 | 2017-11-24 | 扬州大学 | A kind of underground pump station structure of well formula installation |
| CN109728523A (en) * | 2018-12-14 | 2019-05-07 | 国网内蒙古东部电力有限公司赤峰供电公司 | A kind of packaged type distribution box with antitheft explosion prevention function |
-
2021
- 2021-07-06 CN CN202110763139.1A patent/CN113339324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597200A (en) * | 1945-08-22 | 1948-01-20 | B F Sturtevant Co | Improvements relating to the air cooling of heat exchange surfaces in moving vehicles |
| CA2418230A1 (en) * | 2002-01-29 | 2003-07-29 | Snecma Moteurs | Blade control device with variable blade angle and pinch attachment |
| CN103911972A (en) * | 2012-12-28 | 2014-07-09 | 广东河海泵业机械有限公司 | Novel flap valve control system |
| CN206667365U (en) * | 2017-03-22 | 2017-11-24 | 扬州大学 | A kind of underground pump station structure of well formula installation |
| CN109728523A (en) * | 2018-12-14 | 2019-05-07 | 国网内蒙古东部电力有限公司赤峰供电公司 | A kind of packaged type distribution box with antitheft explosion prevention function |
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| CN113339324A (en) | 2021-09-03 |
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