CN114576206A - Automatic desilting visual guide vane body device of vertical axial-flow pump - Google Patents
Automatic desilting visual guide vane body device of vertical axial-flow pump Download PDFInfo
- Publication number
- CN114576206A CN114576206A CN202210251380.0A CN202210251380A CN114576206A CN 114576206 A CN114576206 A CN 114576206A CN 202210251380 A CN202210251380 A CN 202210251380A CN 114576206 A CN114576206 A CN 114576206A
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- pump
- guide vane
- pipe
- calandria
- bearing
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- 230000000007 visual effect Effects 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000010977 unit operation Methods 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 description 15
- 239000003921 oil Substances 0.000 description 12
- 230000003068 static effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 1
Images
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
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/548—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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/02—Self-priming 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)
Abstract
A visual guide vane body device for automatically dredging a vertical axial flow pump. The visual guide vane body device for automatically dredging the vertical axial-flow pump is simple in structure, convenient to clean and capable of improving efficiency. The pump comprises a pump body, wherein a vertical pump shaft is arranged in the pump body, and a water guide bearing is arranged at the bottom of the pump shaft and is positioned in a bearing nest of a guide vane body; still include the drainage subassembly, the drainage subassembly includes calandria one, calandria two and a plurality of pipeline dredging machine, calandria one is the annular, calandria two is the riser of perpendicular setting, the pump body is located the annular mouth of calandria one, calandria two intercommunication calandria one, a plurality of pipeline dredging machine are the annular equipartition and establish in the outside of the pump body, the top of calandria one is arranged in through the support to the pipeline dredging machine, the person in charge of pipeline dredging machine passes the pump body and stretches into the bearing nest bottom of guide vane body, be equipped with the branch pipe in the person in charge, the branch pipe is located the pump body and communicates calandria outward. The invention has convenient control and stable operation, saves time and labor without manual disassembly and cleaning, and eliminates the hidden trouble of unit operation.
Description
Technical Field
The invention relates to the field of large-scale pump bodies, in particular to an automatic dredging visual guide vane body device of a vertical axial-flow pump.
Background
The hydraulic hub project for Jiangdu mainly comprises 4 water pumping stations in large-scale shops, 12 large and medium-sized water gates, power transmission and transformation projects and drainage riverways. The engineering integrates the functions of water pumping, drought resistance, flood drainage, flood discharge and the like, and plays a great social benefit. As a national level water conservancy project management unit and a water conservancy safety standardization first level unit, the health-care water-saving anti-flood and flood-draining system can guarantee the flood control and flood drainage safety of Hua river and Yishu Siyu basin in Jiangsu province, and simultaneously undertake the industrial and agricultural production and domestic water safety of 50 counties (cities and districts) in Subei 7 city and the Jinghang canal shipping safety guarantee task.
The four stations in Jiangdu are improved and then are provided with 7 ZLQ30-7.8 type hydraulic fully-regulated vertical axial-flow pumps, wherein the bearing nest of the guide vane body can generate a water inlet phenomenon, and the lubricating and cooling performance of a water guide bearing of a unit is influenced, so that the unit operation is greatly influenced. Particularly, when the amount of water seeped into the moving and static rings is large during the operation of the unit, the water level in the bearing nest of the guide vane body continuously rises, and water enters the oil basin when the water level exceeds the upper plane of the water guide oil basin 20. Therefore, the water-guiding oil-lubricated bearing is filled with river water, the lubrication effect of the water-guiding bearing is influenced, and impurities such as silt in the river water can accelerate the abnormal abrasion of the bearing. And the water inlet fault of the water-guiding oil-lubricating bearing occasionally occurs during the shutdown.
Taking four stations as an example, the water inlet fault of the water guide bearing occurs 2 times per year on average.
The method mainly comprises two modes, namely, in the condition of time pressure, accumulated water in an oil basin is pumped out through an oil drain pipe on one side, and then oil is replenished through an oil filling pipe. Thus, two people are typically required to complete within a working day. And secondly, under the condition that time is allowed, the manhole is opened, the movable and static rings are further checked, the reason for increasing the water leakage amount at the positions of the movable and static rings is found, the rubber rings of the movable and static rings are replaced when necessary, and the missing static ring seat spring is supplemented. Thus, six people are typically required to complete three working days.
Under the condition, a single machine can pump water for 129.6 ten thousand m ^3 in 3 days, and once the problem occurs in the flood season, the flood prevention safety is seriously damaged. In order to avoid the repeated occurrence of the problem, the four stations adopt periodical manual disassembly for sludge cleaning, thereby wasting time and labor. And the pipelines generate certain deposition in about 2 months on average, thereby reducing the reliability.
Disclosure of Invention
Aiming at the problems, the invention provides the visual guide vane body device for automatically dredging the vertical axial-flow pump, which has the advantages of simple structure, convenience in cleaning and efficiency improvement.
The technical scheme of the invention is as follows: the water guide pump comprises a pump body, wherein a vertical pump shaft is arranged in the pump body, and a water guide bearing is arranged at the bottom of the pump shaft and is positioned in a bearing socket of a guide vane body;
also comprises a drainage component, the drainage component comprises a first pipe bank, a second pipe bank and a plurality of pipeline dredging machines,
the first calandria is annular, the second calandria is a vertical pipe which is vertically arranged,
the pump body is positioned in the annular opening of the first calandria, the second calandria is communicated with the first calandria,
a plurality of pipeline dredging machines are uniformly distributed on the outer side of the pump body in a ring shape,
the pipeline dredging machine is characterized in that the first exhaust pipe is arranged above the pipeline dredging machine through a support, a main pipe of the pipeline dredging machine penetrates through the pump body and stretches into the bottom of a bearing nest of the guide vane body, a branch pipe is arranged on the main pipe, and the branch pipe is located outside the pump body and is communicated with the first exhaust pipe.
The self-priming pump is arranged outside the pump body, one end of the self-priming pump is connected with the upper end drain pipe, the other end of the self-priming pump is connected with the lower end drain pipe,
a channel is arranged between the pump body and the bearing nest of the guide vane body, and the water drainage pipe at the upper end is positioned in the channel.
The channel is located above the main pipe.
The upper end drain pipe is a telescopic pipe.
Also comprises a drop-in type liquid level transmitter and a controller, wherein the drop-in type liquid level transmitter is arranged in the bearing nest of the guide vane body,
the throwing type liquid level transmitter is connected with a controller, and the controller is connected with a pipeline dredging machine and a self-sucking pump.
Also comprises an underwater high-definition camera and a liquid crystal display touch screen,
the underwater high-definition camera is arranged in the bearing nest of the guide vane body,
the underwater high-definition camera is connected with a liquid crystal display touch screen, and the liquid crystal display touch screen is arranged in a control box outside the pump body.
The controller is located in the control box.
Still include supplementary dredging machine, supplementary dredging machine sets up along the circumference of calandria one, supplementary dredging machine's the person in charge intercommunication calandria one.
The plurality of pipe openers comprises at least four.
In the working process of the invention, the drainage assembly is arranged outside the pump body, so that accumulated water and sludge can be conveniently drained.
When the drainage component moves, the pipeline dredging machine injects water into the bearing nest of the guide vane body through the main pipe, so that the sludge is softened and loosened conveniently, the sludge deposition in the bearing nest is avoided, and the sludge is not easy to discharge.
When the sludge is discharged, accumulated water and sludge in the bearing nest of the guide vane body enter the branch pipe through the main pipe, then enter the first discharge pipe and finally enter the second discharge pipe to be discharged.
The invention has convenient control and stable operation, saves time and labor without manual disassembly and cleaning, and eliminates the hidden trouble of unit operation.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
figure 2 is a schematic view of the construction of the drain assembly,
figure 3 is a schematic view of the connection structure of the pipe opener,
FIG. 4 is a partial structural schematic view of a bearing pocket in a vane body,
in the figure, 1 is a pump body, 2 is a pump shaft, 3 is a water guide bearing, 4 is a guide vane body, 40 is a bearing nest, 5 is a first calandria, 6 is a second calandria, 7 is a pipeline dredging machine, 8 is a support, 9 is a main pipe, 10 is a branch pipe, 11 is a self-priming pump, 12 is an upper end drain pipe, 13 is a lower end drain pipe, 14 is a channel, 15 is a throwing type liquid level transmitter, 16 is an underwater high-definition camera, 17 is a liquid crystal display touch screen, 18 is a control box, 19 is an auxiliary dredging machine, and 20 is an oil basin.
Detailed Description
The invention is shown in figures 1-4, and comprises a pump body 1, wherein a vertical pump shaft is arranged in the pump body 1, a water guide bearing 3 is arranged at the bottom of the pump shaft 2, and the water guide bearing is positioned in a bearing socket of a guide vane body;
also comprises a drainage component, the drainage component comprises a first calandria 5, a second calandria 6 and a plurality of pipeline dredging machines 7,
the first calandria 5 is annular, the second calandria 6 is a vertical pipe which is vertically arranged,
the pump body 1 is connected with an annular pipeline of a first calandria 5, the second calandria 6 is communicated with the first calandria,
a plurality of pipeline dredging machines 7 are uniformly distributed on the outer side of the pump body in a ring shape,
the pipe dredging machine 7 is arranged above the calandria 6 through the support 8, the main pipe 9 of the pipe dredging machine 5 penetrates the pump body 1 and stretches into the bearing nest bottom of the guide vane body, the main pipe 9 is provided with a branch pipe 10, and the branch pipe 10 is arranged outside the pump body and is communicated with the calandria 5.
In the working process of the invention, the drainage assembly is arranged outside the pump body, so that accumulated water and sludge can be conveniently drained.
When the drainage component moves, the pipeline dredging machine is used for injecting water into the bearing nest of the guide vane body through the main pipe, so that the sludge is softened and loosened, the sludge deposition in the bearing nest is avoided, and the sludge is not easy to discharge.
When the sludge is discharged, accumulated water and sludge in the bearing nest of the guide vane body enter the branch pipe through the main pipe, then enter the first discharge pipe and finally enter the second discharge pipe to be discharged.
When the drainage device is used, the main pipe of the pipeline dredging machine and the first drainage pipe can be obliquely arranged, so that accumulated water can be conveniently drained to the first drainage pipe and then drained to the second drainage pipe. When the pipeline dredging machine injects water, accumulated water and sludge can be flushed to the main pipe to be discharged, and the pipeline dredging machine is convenient and reliable. The pipeline dredging machine can be staggered to open, so that the subsequent discharge action is facilitated.
The self-priming pump 11 is arranged outside the pump body, one end of the self-priming pump is connected with an upper end drain pipe 12, the other end of the self-priming pump is connected with a lower end drain pipe 13,
a channel 14 is arranged between the pump body and the bearing nest of the guide vane body, and the drain pipe 12 is connected with a pipeline on one side of the channel 14.
The self-sucking pump is arranged, so that the water level of the bearing nest is conveniently forced to be reduced, and the self-sucking pump is suitable for the condition that the water level of the bearing nest does not exceed the water level of the upper end surface of the water guide oil basin and does not enter the oil basin.
Meanwhile, the device is suitable for the condition that the sludge in the accumulated water is less and the blockage cannot occur.
The channel 14 is located above the main pipe 9.
Thus, the two are staggered, and at the same time, the channel is used for placing the line of the subsequent monitoring system.
The upper end drain pipe 12 is a telescopic pipe.
When the input type liquid level transmitter measures that the water level in the bearing nest continuously rises, the PLC sends out an instruction, and the self-priming pump is started to forcibly discharge and reduce the water level of the bearing nest.
When the telescopic action is set, different cleaning actions can be carried out, and when a small amount of accumulated water is at the bottom of the bearing nest of the guide vane body, the guide vane body stretches into the bottom to suck out the accumulated water. When oil exists above the accumulated water, the length of the suction pipe is adjusted to suck out the oil, so that the oil-water separation operation is facilitated.
Also comprises a drop-in liquid level transmitter 15 and a controller, wherein the drop-in liquid level transmitter 15 is arranged in a bearing nest 40 of the guide vane body,
the input type liquid level transmitter 15 is connected with a controller, and the controller is connected with a pipeline dredging machine and a self-sucking pump.
Like this, set up input liquid level changer, be convenient for gather the liquid level signal to control dredging machine and self priming pump action guarantee safe water level, ensure that water can not get into the oil pan, adapt to different operating modes.
Also comprises an underwater high-definition camera 16 and a liquid crystal display touch screen 17,
the underwater high-definition camera 16 is arranged in the bearing nest 40 of the guide vane body,
the underwater high-definition camera 16 is connected with a liquid crystal display touch screen 17, and the liquid crystal display touch screen is arranged in a control box 18 outside the pump body.
Image acquisition is carried out through high definition camera under water, can see on the liquid crystal display touch-sensitive screen that the water level in the bearing nest is and whether have the situation such as lubricating oil leakage in real time. The touch screen can also display the water level value measured by the liquid level transmitter in real time.
The controller is located within the control box 18.
Like this, realize the real-time automatic monitoring of signal, effectively avoided original 2 hours to tour hysteresis quality that a water leads oily lubricated bearing hidden danger discoveries.
Still include supplementary dredging machine 19, supplementary dredging machine 19 sets up along the circumference of calandria 5, supplementary dredging machine's the person in charge intercommunication calandria 5.
Set up supplementary dredging machine, be convenient for not hard up the silt in calandria one, avoid calandria one to take place blocking phenomenon, improve the desilting reliability.
The number of pipe canalators 7 comprises at least four.
Can become flexible according to operating condition and clear up the inside silt of pipeline, improve desilting efficiency.
The invention can automatically detect the water level value of the bearing pit in real time, realize real-time video detection, greatly improve the capability of finding the hidden water inlet danger of the water-guiding oil-lubricating bearing, automatically carry out self-priming pump to control water drainage, and effectively ensure that the engineering benefit is maximally exerted during the drainage period.
The disclosure of the present application also includes the following points:
(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;
(2) the embodiments and features of the embodiments disclosed herein can be combined with each other to arrive at new embodiments without conflict;
the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.
Claims (9)
1. A vertical axial-flow pump automatic dredging visual guide vane body device comprises a pump body, wherein a vertical pump shaft is arranged in the pump body, a water guide bearing is arranged at the bottom of the pump shaft, and the water guide bearing is positioned in a bearing nest of a guide vane body;
it is characterized by also comprising a drainage component, wherein the drainage component comprises a first pipe bank, a second pipe bank and a plurality of pipeline dredging machines,
the first calandria is annular, the second calandria is a vertical pipe which is vertically arranged,
the pump body is positioned in the annular opening of the first calandria, the second calandria is communicated with the first calandria,
a plurality of pipeline dredging machines are uniformly distributed on the outer side of the pump body in a ring shape,
the pipeline dredging machine is characterized in that the first exhaust pipe is arranged above the pipeline dredging machine through a support, a main pipe of the pipeline dredging machine penetrates through the pump body and stretches into the bottom of a bearing nest of the guide vane body, a branch pipe is arranged on the main pipe, and the branch pipe is located outside the pump body and is communicated with the first exhaust pipe.
2. The visual guide vane device for automatic desilting of the vertical axial-flow pump according to claim 1, characterized in that the device further comprises a self-priming pump, the self-priming pump is arranged outside the pump body, one end of the self-priming pump is connected with the upper end drain pipe, the other end is connected with the lower end drain pipe,
a channel is arranged between the pump body and the bearing nest of the guide vane body, and the water drainage pipe at the upper end is positioned in the channel.
3. The visual guide vane device of claim 2, wherein the channel is located above the main pipe.
4. The visual guide vane device of vertical axial-flow pump automatic desilting of claim 3, characterized in that, the upper end drain pipe is the flexible pipe.
5. The visual guide vane body device for automatically dredging the vertical axial-flow pump according to any one of claims 2-4, characterized by further comprising a drop-in type liquid level transmitter and a controller, wherein the drop-in type liquid level transmitter is arranged in a bearing socket of the guide vane body,
the throwing type liquid level transmitter is connected with a controller, and the controller is connected with a pipeline dredging machine and a self-sucking pump.
6. The visual guide vane body device for automatically dredging a vertical axial-flow pump according to claim 5, further comprising an underwater high-definition camera and a liquid crystal display touch screen,
the underwater high-definition camera is arranged in the bearing nest of the guide vane body,
the underwater high-definition camera is connected with a liquid crystal display touch screen, and the liquid crystal display touch screen is arranged in a control box outside the pump body.
7. The vertical axial flow pump automatic dredging visual guide vane body device according to claim 6, wherein the controller is located in the control box.
8. The visual guide vane body device for automatic dredging of the vertical axial-flow pump according to claim 1, further comprising an auxiliary dredging machine, wherein the auxiliary dredging machine is arranged along the circumferential direction of the first discharge pipe, and a main pipe of the auxiliary dredging machine is communicated with the first discharge pipe.
9. The visual guide vane device of claim 1, wherein the plurality of pipe openers comprises at least four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251380.0A CN114576206B (en) | 2022-03-15 | 2022-03-15 | Automatic desilting visual guide vane device of vertical axial flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210251380.0A CN114576206B (en) | 2022-03-15 | 2022-03-15 | Automatic desilting visual guide vane device of vertical axial flow pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114576206A true CN114576206A (en) | 2022-06-03 |
| CN114576206B CN114576206B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210251380.0A Active CN114576206B (en) | 2022-03-15 | 2022-03-15 | Automatic desilting visual guide vane device of vertical axial flow pump |
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| Country | Link |
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| CN (1) | CN114576206B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030588A (en) * | 1996-07-17 | 1998-02-03 | Hitachi Ltd | Preceding stand-by vertical pump |
| US5752785A (en) * | 1994-09-14 | 1998-05-19 | Hitachi, Ltd. | Drainage pump station and drainage operation method for drainage pump station |
| CN102818028A (en) * | 2012-08-27 | 2012-12-12 | 福建南电股份有限公司 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
| CN108087180A (en) * | 2018-01-09 | 2018-05-29 | 河南新飞纪元节能科技股份有限公司 | Vertical postposition bulb vertical axis stretches axial-flow hydrogenerator group |
| CN111155498A (en) * | 2020-03-27 | 2020-05-15 | 黄河水利水电开发总公司 | Sand blowing and dredging system and method for top cover of water turbine |
| CN112392731A (en) * | 2020-07-07 | 2021-02-23 | 上海连成集团苏州股份有限公司 | Axial-flow pump with washing function |
| CN212615138U (en) * | 2020-04-20 | 2021-02-26 | 杭州力源发电设备有限公司 | Top cover drainage pressure equalizing cavity structure of water turbine |
| CN212898771U (en) * | 2020-07-20 | 2021-04-06 | 黄河水利水电开发总公司 | A dash silt device for hydroelectric set top cap |
| CN113931279A (en) * | 2020-07-14 | 2022-01-14 | 浙江长兴飞洋建筑工程有限公司 | Municipal works plumbing shaft |
-
2022
- 2022-03-15 CN CN202210251380.0A patent/CN114576206B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5752785A (en) * | 1994-09-14 | 1998-05-19 | Hitachi, Ltd. | Drainage pump station and drainage operation method for drainage pump station |
| JPH1030588A (en) * | 1996-07-17 | 1998-02-03 | Hitachi Ltd | Preceding stand-by vertical pump |
| CN102818028A (en) * | 2012-08-27 | 2012-12-12 | 福建南电股份有限公司 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
| CN108087180A (en) * | 2018-01-09 | 2018-05-29 | 河南新飞纪元节能科技股份有限公司 | Vertical postposition bulb vertical axis stretches axial-flow hydrogenerator group |
| CN111155498A (en) * | 2020-03-27 | 2020-05-15 | 黄河水利水电开发总公司 | Sand blowing and dredging system and method for top cover of water turbine |
| CN212615138U (en) * | 2020-04-20 | 2021-02-26 | 杭州力源发电设备有限公司 | Top cover drainage pressure equalizing cavity structure of water turbine |
| CN112392731A (en) * | 2020-07-07 | 2021-02-23 | 上海连成集团苏州股份有限公司 | Axial-flow pump with washing function |
| CN113931279A (en) * | 2020-07-14 | 2022-01-14 | 浙江长兴飞洋建筑工程有限公司 | Municipal works plumbing shaft |
| CN212898771U (en) * | 2020-07-20 | 2021-04-06 | 黄河水利水电开发总公司 | A dash silt device for hydroelectric set top cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114576206B (en) | 2024-07-02 |
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