CN219568780U - Hydropower station water pump water supply system - Google Patents
Hydropower station water pump water supply system Download PDFInfo
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- CN219568780U CN219568780U CN202320500696.9U CN202320500696U CN219568780U CN 219568780 U CN219568780 U CN 219568780U CN 202320500696 U CN202320500696 U CN 202320500696U CN 219568780 U CN219568780 U CN 219568780U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a hydropower station water pump water supply system which comprises a flow guiding device, a water inlet filter screen, a horizontal water taking section, an overflow section, a valve, a centrifugal pump, a water filter, a diversion control device and a hydraulic generator water supply unit, wherein the water inlet filter screen is arranged on the water inlet filter screen; the device is characterized in that a diversion device is covered at a water inlet for diversion, a water inlet filter screen is arranged at the water inlet for filtering water flow, a horizontal water taking section and an overflow section are connected and arranged at the rear end of the water inlet filter screen, the sections are connected to a water filter through a pipeline, a valve and a centrifugal pump are arranged on the pipeline, the rear end of the water filter is connected to a diversion control device through a pipeline, and the diversion control device is connected to a generator water supply unit; the device has the advantages of simple structure, convenient installation, improved operation condition of the water supply system, stable water supply pressure, reduced noise and vibration of the water pump, contribution to occupational health, reduced energy consumption and maintenance workload, suitability for water and electricity engineering, application in hydraulic engineering pump stations, and remarkable social benefit, technical and economic benefit.
Description
Technical Field
The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a hydropower station water pump water supply system.
Background
When the technical water supply of the power station adopts a water pump to take water, the conventional water pump is arranged at the water intake and only provided with a trash rack, for a pressureless self-flowing runner, when the included angle between the water intake section of the water pump and the raw water flow direction is less than or equal to 90 degrees and the raw water flow speed is larger, water enters the water intake pipe in a turbulent mode through the water intake filter screen, meanwhile, the water intake section of the water pump is negative pressure, when a part of pressure in turbulent water drops below saturated vapor pressure, cavitation phase change is carried out on liquid water to generate bubbles, huge destructive force is generated after accumulation, cavitation is formed in a pump body, the water pump is in a severe operation condition for a long time, the cavitation of a water pump impeller is serious, the vibration is large, the water supply pressure is unstable, the noise is high, and the operation efficiency is low. Taking a water station with a level 2 water power station of the holy Cork of Bolivia as an example, the technical water supply pump takes water from a tail water channel of a water turbine, the impeller of the water pump is cavitation before the water pump is used for diversion arrangement, the water pump is severely vibrated and is large, the water supply pressure is unstable, even the water supply under some working conditions is insufficient, the noise of the water pump is high, the operation efficiency is low, and the maintenance period of the water pump is short.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a hydropower station water pump water supply system.
The aim of the utility model is achieved by the following technical scheme: a hydropower station water pump water supply system comprises a flow guiding device, a water inlet filter screen, a horizontal water taking section, a flow passing section, a valve, a centrifugal pump, a water filter, a flow dividing control device and a water generator water supply unit; the device sets up the intake in the tailrace, sets up guiding device 1 in water inlet department and is used for the water conservancy diversion, sets up the water inlet filter screen in water inlet department and filters rivers, then connects at water inlet filter screen 2 rear end and sets up horizontal water intaking section and overflow section, and horizontal water intaking section and overflow section pass through the pipeline connection to the water purifier, and during the course, set up valve, centrifugal pump on the pipeline, be connected to the reposition of redundant personnel controlgear through the pipeline at the rear end of water purifier, reposition of redundant personnel controlgear 7 is connected to generator water supply unit.
Preferably, the flow guiding device is arranged as a U-shaped cover body.
Preferably, the two sides of the U-shaped cover body of the flow guiding device 1 are obliquely arranged, the middle part is horizontally arranged, the connecting lugs of the parallel middle part are arranged outside the edges of the two sides of the U-shaped cover body, and the connecting lugs are provided with bolt holes.
Preferably, the U-shaped cover body of the flow guiding device is sized to cover the two water gaps, a supporting rod is arranged in the middle of the U-shaped cover, and a screw hole is formed in the supporting rod.
Preferably, the diversion device 1 is formed by bending a 10mm thick steel plate; the supporting rod is arranged to be channel steel.
The utility model has the following advantages: the utility model has simple structure, low cost and convenient installation, can improve the running condition of a water supply system, stabilize the water supply pressure, reduce the noise and vibration of the water pump, is beneficial to professional health, reduces energy consumption and reduces overhaul workload; besides being suitable for water and electricity engineering, the water-saving type hydraulic pump station can also be applied to hydraulic pump stations, and has remarkable social benefit and technical and economic benefit; the problems of cavitation erosion, running vibration, unstable water supply system and insufficient system flow of the water pump caused by chaotic distribution of the water intake flow field in the water supply system of the water pump of the hydropower station are solved.
Drawings
FIG. 1 is a flow chart of the present utility model.
Fig. 2 is a schematic structural diagram of the flow guiding device.
Fig. 3 is a structural floor plan of the present utility model.
Fig. 4 is a schematic view of the arrangement structure of the flow guiding device at the elevation 1.
Fig. 5 is a schematic view of the arrangement structure of the flow guiding device at the elevation 2.
In the figure, a 1-flow guiding device, a 2-water inlet filter screen, a 3-horizontal water taking section, a flow passing section, a 4-valve, a 5-centrifugal pump, a 6-water filter, a 7-split control device and an 8-hydraulic generator water supply unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The water supply system of the hydropower station water pump as shown in the figure comprises a flow guiding device 1, a water inlet filter screen 2, a horizontal water taking section, a horizontal flow passing section 3, a valve 4, a centrifugal pump 5, a water filter 6, a diversion control device 7 and a water generator water supply unit 8. The device is provided with a water intake in a tail water channel, and a diversion device 1 is covered at the water intake to conduct diversion on water flow. The water inlet is provided with a water inlet filter screen 2 for filtering water flow, the rear end of the water inlet filter screen 2 is connected with a horizontal water taking section and an overcurrent section 3, the horizontal water taking section and the overcurrent section 3 are connected to a water filter 6 through pipelines, a valve 4 and a centrifugal pump 5 are arranged on the pipelines, the rear end of the water filter 6 is connected to a diversion control device 7 through the pipelines, and the diversion control device 7 is connected to a generator water supply unit 8.
In the scheme, the water supply pump takes water from the tail water channel of the water turbine, and the water is discharged to the tail water after passing through the equipment cooling unit, the system is an open circulation system, and two sets of water taking arrangements are mutually main. Before the water pump diversion device is not installed, the water flow path is as follows: the water pump has the advantages of high efficiency, low maintenance period, and low cost. After the diversion device 1 is arranged, the water flow condition of the water intake water inlet section is improved, the running stability and the energy efficiency of the water pump are improved, the water supply pressure of the system is stable, the maintenance period is prolonged, the overall efficiency, the running reliability and the stability of the water supply system are ensured, and the long-term reliable and stable running of the water turbine is ensured.
The main arrangement content of the system is as follows:
1. when the system is in an open structure and the raw water flow direction and the water intake direction are 90 degrees or less than 90 degrees, the flow field distribution of the water inlet section of the water pump can be better improved by adopting the arrangement of the flow guiding device, so that the overall efficiency, the running reliability and the stability of the water supply system are improved.
2. The water intake guide device of the water pump is of a rear-mounted structure, and the water intake guide device of the water pump can be manufactured and additionally installed in the original arrangement on site.
3. In the embodiment, the water inlet size of the water pump is 200mm, and the outlet pressure of the water pump is 0.35MPa.
4. The guide device is a U-shaped barrel plate type structure cover body, can also be arc-shaped according to field processing conditions, specifically, the two sides of the U-shaped cover body of the guide device 1 are obliquely arranged, the middle part of the guide device is horizontally arranged, the connecting lugs of the parallel middle part are arranged outside the edges of the two sides of the U-shaped cover body, the connecting lugs are provided with bolt holes, one end of the guide device is provided with a hole, the other end of the guide device is closed, the hole faces the water flow direction during installation, and the vertical water inlet area of the hole is preferably 1.25 times or more of the water intake pipe area of the water pump so as to ensure the water intake flow. The upper end and the lower end of the flow guiding device are not sealed, so that sundries in water can be washed away and the water intake of the water pump can be cleaned conveniently.
In the device, the combined use of the guide cover is an important point, the guide device is used for changing the water flow direction of the water inlet of the water pump and the flow state of the water entering the water intake section, so that the water entering the water intake pipe is consistent with the water flow direction of the water intake pipe, the pressure at the water intake of the water pump is increased, the turbulence after the water enters the water intake is reduced and eliminated, and the vibration and cavitation of the water pump are reduced, so that the energy efficiency of the water pump is improved, the operation of the water pump is stabilized, the maintenance period of the water pump is prolonged, and the flow rate of the water pump outlet is ensured, thereby improving the overall efficiency, the operation reliability and the stability of the water supply system. The distribution diagram of the water intake flow field after the diversion device is arranged is shown in figure 2. The water intake guide device of the water pump is a rear-mounted device, can be arranged at the beginning of design, can be additionally arranged after the water pump operates, and is convenient to manufacture and install.
5. For a plurality of water intake, according to the water intake position and size, an independent flow guiding device or a shared flow guiding device can be arranged, in this embodiment, two water intake share one flow guiding device, see fig. 2 or 4, a water pump water intake pipe is 2 phi 250 steel pipes, and 3 phi 250 holes are formed on the flow guiding device; in the scheme, the flow guiding device 1 is made of a 10mm thick steel plate, the geometric specification is 3700x1200x10mm, the installation completion size is 3100x1200x10mm, and low carbon steel is selected. The expansion bolts are made of 00Cr19Ni10, 18 sleeves with the specification of M16-200 and are used for fixing the foundation plate and the flow guiding device, and the embedded bolts can be high-strength bolts; the wedge plate adopts 100x 40-60 specifications, is made of 4 carbon steel blocks, and is used for ground installation and adjustment. The support rod adopts channel steel with the specification of 100x48 and the length of 580mm, and the material is carbon steel 2, so as to strengthen the rigidity of the flow guiding device. The base plate is made of carbon steel 4 blocks with the specification of 150x150x10 mm. The device can be provided with a diversion device by a single water intake, when a plurality of water intake are concentrated, the common diversion device can be arranged by referencing the expansion of the series size, and the width of the diversion device is more than 2000mm, and a supporting rod is arranged in the middle of the inside of the diversion device for supporting.
6. The overflow area of the filter screen at the water inlet of the water pump is twice or more than that of the water intake pipe, the plate filter screen is adopted in the embodiment, the diameter of the filter hole is determined according to engineering requirements and the sundries passing pump size requirements, and the embodiment is 30mm.
7. The water intake section of the water pump is horizontally arranged, so as to ensure the flow state of water flow of the water intake pipe section, reduce hydraulic loss, and the diameter of the water intake pipe is 1.2 times or more than that of the water inlet of the water pump, in the embodiment, the diameter of the water inlet of the water pump is 200mm, and the diameter of the water intake section is 250mm; the bent section adopts a standard elbow, and the reducing pipe is arranged to be opposite to the water inlet of the water pump so as to ensure that water flow enters the impeller chamber of the water pump in an ideal flow state.
8. In order to reduce the arrangement space, the water pump of the embodiment adopts a vertical water pump, and a lifting hook is arranged at the top of the lifting hole so as to be convenient to install.
9. As a water supply item, a water filter is provided at the outlet of the water pump, and the water is filtered and supplied to each water unit of the hydroelectric generator, and as a water conservancy drainage item, the water filter is not needed.
10. The water flow enters the diversion control equipment after passing through the water filter, and is supplied to technical water supply units such as a water supply turbine, a generator and the like, and finally is intensively discharged to the downstream of the tail water channel, so that the whole system process is completed.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (5)
1. A hydropower station water pump water supply system, characterized in that: the device comprises a flow guiding device (1), a water inlet filter screen (2), a horizontal water taking section, a horizontal water flowing section (3), a valve (4), a centrifugal pump (5), a water filter (6), a diversion control device (7) and a water generator water supply unit (8); set up the intake in the tailrace, establish guiding device (1) in water inlet department cover, set up water inlet filter screen (2) in water inlet department, water inlet filter screen (2) rear end connection sets up horizontal water intaking section and overflows section (3), horizontal water intaking section and overflows section (3) and pass through pipe connection to water purifier (6), set up valve (4), centrifugal pump (5) on the pipeline, be connected to reposition of redundant personnel controlgear (7) through pipe connection in the rear end of water purifier (6), reposition of redundant personnel controlgear (7) are connected to generator water supply unit (8).
2. A hydropower station water pump water supply system according to claim 1, wherein: the flow guiding device (1) is arranged as a U-shaped cover body.
3. A hydropower station water pump water supply system according to claim 2, wherein: the U-shaped cover body of guiding device (1) both sides slope sets up, and the mid portion level sets up, is provided with the engaging lug of parallel mid portion outside the edge of the both sides of the U-shaped cover body, is provided with the bolt hole on the engaging lug.
4. A hydropower station water pump water supply system according to claim 2, wherein: the U-shaped cover body of the flow guiding device (1) is sized to cover the two water gaps, a supporting rod is arranged in the middle of the U-shaped cover, and screw holes are formed in the supporting rod.
5. The hydroelectric power station water pump water supply system of claim 4, wherein: the flow guiding device (1) is formed by bending a 10mm thick steel plate; the supporting rod is arranged to be channel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320500696.9U CN219568780U (en) | 2023-03-15 | 2023-03-15 | Hydropower station water pump water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320500696.9U CN219568780U (en) | 2023-03-15 | 2023-03-15 | Hydropower station water pump water supply system |
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| Publication Number | Publication Date |
|---|---|
| CN219568780U true CN219568780U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320500696.9U Active CN219568780U (en) | 2023-03-15 | 2023-03-15 | Hydropower station water pump water supply system |
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| Country | Link |
|---|---|
| CN (1) | CN219568780U (en) |
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- 2023-03-15 CN CN202320500696.9U patent/CN219568780U/en active Active
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