CN214194771U - Secondary circulating cooling water supply system of hydropower station - Google Patents
Secondary circulating cooling water supply system of hydropower station Download PDFInfo
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- CN214194771U CN214194771U CN202022714884.0U CN202022714884U CN214194771U CN 214194771 U CN214194771 U CN 214194771U CN 202022714884 U CN202022714884 U CN 202022714884U CN 214194771 U CN214194771 U CN 214194771U
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- supply system
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Abstract
The utility model discloses a secondary circulating cooling water supply system of a hydropower station, which comprises a cooler tank with the height higher than the downstream tail water level and a cooler detachably connected inside the cooler tank, wherein a liquid level sensor is arranged inside the cooler tank, and the bottom of the liquid level sensor is connected with a drain pipe and leads to a downstream tail water channel; the cooler grooves are respectively connected with a self-flowing water supply pipeline with one end connected to the pressure steel pipe and a pressurized water supply pipeline with one end connected to the downstream tail water channel; all be provided with motorised valve and flow control valve on artesian water supply pipe and the pressurization water supply pipe, each motorised valve can freely switch over according to the power station head, each flow control valve can be according to level sensor's liquid level signal comes the control to get into the discharge of water in the cooler tank. The water supply system of the utility model is simple and reliable, and can effectively solve the problem of the overhaul of the cooler; and this scheme can freely switch according to different power station flood peak scopes, and the application is stronger.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering field, concretely relates to power station secondary circulative cooling water supply system.
Background
In order to prevent silt and aquatic organisms from entering a water supply pipeline to block an air cooler or an oil cooler, a secondary circulation cooling water supply system, namely a water supply mode of a water pump and an intermediate water tank, is generally adopted in the water supply system of the water power station technology of the silt-rich river at home and abroad at present. The system comprises a water source, a water supply pipeline, a circulating water pool, a water pump, a cooler, a valve, an automation element and the like, wherein the cooler is usually arranged in a flow channel (an underground workshop) or on a concrete platform above a tail water outlet (a ground workshop). The working principle of the system is that water in a circulating water tank is pressurized and sent to each user of the unit by a water pump, then the water is cooled by a cooler and flows into the circulating water tank, so that a circulating water supply system is formed, and river water in a flow channel or a tail water channel is primary water and can be used as a cold source for heat exchange.
The technical water supply mode solves the problem that silt and aquatic organisms block the air cooler or the oil cooler of the unit, but the overhaul of the cooler always troubles the operators of the power station: for an underground plant, the overhaul condition is met after the runner is emptied by combining the overhaul of a unit with the overhaul of a cooler every time; for ground plants, a diver needs to be sent to dive underwater to take over the cooler and disassemble the foundation, and the convenience and the flexibility are poor.
Based on the circumstances, the utility model provides a power station secondary circulative cooling water supply system can effectively solve above problem.
SUMMERY OF THE UTILITY MODEL
To the not enough of existence among the prior art, the utility model aims to provide a power station secondary circulative cooling water supply system. The water supply system of the utility model is simple and reliable, and can effectively solve the problem of the overhaul of the cooler; and this scheme can freely switch according to different power station flood peak scopes, and the application is stronger.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a secondary circulation cooling water supply system of a hydropower station comprises a cooler tank with the elevation higher than the downstream tail water level and a cooler detachably connected inside the cooler tank, wherein a liquid level sensor is arranged inside the cooler tank, and the bottom of the cooler tank is connected with a drain pipe and leads to a downstream tail water channel; the cooler grooves are respectively connected with a self-flowing water supply pipeline with one end connected to the pressure steel pipe and a pressurized water supply pipeline with one end connected to the downstream tail water channel; all be provided with motorised valve and flow control valve on artesian water supply pipe and the pressurization water supply pipe, each motorised valve can freely switch over according to the power station head, each flow control valve can be according to level sensor's liquid level signal comes the control to get into the discharge of water in the cooler tank.
As an optimal technical scheme of the utility model, the water supply pipe that flows automatically is including parallelly connected water supply pipe one that flows automatically and water supply pipe two that flows automatically, be provided with the relief pressure valve on the water supply pipe two that flows automatically for the cooling water decompresses and flows into the cooler tank behind the design pressure.
As a preferred technical scheme of the utility model, cooler tank top is connected with and accesss to the overflow pipe of drain pipe.
As an optimized technical proposal of the utility model, the cooler is fixed in the cooler groove through the buckle type foundation.
As an optimized technical scheme of the utility model, the minimum mouth of pipe elevation of drain pipe is higher than the highest tail water level in low reaches.
As an optimized technical scheme of the utility model, the pipe diameter of flowing water supply pipe and pressurized water supply pipe all is greater than the drain pipe diameter.
As the utility model discloses a preferred technical scheme, cooler tank both sides have set firmly the steel cat ladder, and personnel get into the cooler tank during easy access.
As an optimized technical scheme of the utility model, the cooler connects to unit user and circulating water pond through inlet tube and outlet pipe respectively.
As an optimized technical scheme of the utility model, be provided with the water pump on the pressurization water supply pipe.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model improves the convenience and the economy of the overhaul of the cooler, can greatly shorten the overhaul time of the cooler, provides favorable conditions for the continuous and stable operation of the power station, and is particularly suitable for the hydropower station of a sediment-rich river; meanwhile, the switching among different branches is realized through the electric valve, and the switching device can be applied to a power station with a large water head amplitude or a power station of a certain water head section.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is given with reference to the accompanying examples, but it should be understood that the drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in FIG. 1, the cooler 9 is arranged inside the cooler tank 8, the bottom of the cooler 9 is provided with a detachable buckle type foundation 18 for fixing the cooler 9, the water inlet pipe 16 of the cooler 9 is connected with a unit user, and the water outlet pipe 20 is connected with a circulating water pool; the cooler tank 8 is provided on both sides with steel ladders 17 and level sensors 10 are arranged in place.
The top of the cooler groove 8 is provided with an overflow pipe 11, the bottom of the cooler groove is provided with a drain pipe 19, the overflow pipe 11 and the drain pipe 19 are connected through welding, and finally discharged into a downstream river channel after being gathered, and the lowest pipe orifice elevation of the overflow pipe is required to be higher than the highest tail water level of the downstream. Since both the cooler tank 8 and the drain pipe 19 are at a higher elevation than the downstream tail water level, the water in the cooler tank 8 can flow to the downstream tail water by gravity.
The water supply pipeline of the cooler tank 8 comprises a self-flowing water supply pipeline and a pressurized water supply pipeline, and the self-flowing water supply pipeline comprises a first self-flowing water supply pipeline 1 and a second self-flowing water supply pipeline 4 which are connected in parallel; the gravity water supply pipeline 1, the gravity water supply pipeline two 4 and the pressure water supply pipeline 12 are respectively provided with an electric valve (2, 5, 14) and a flow regulating valve (3, 7, 13), each electric valve can be freely switched according to a water head of a power station, and each flow regulating valve can control water flow entering the cooler groove 8 according to a liquid level signal of the liquid level sensor 10. Specifically, the second gravity water supply pipeline 4 is further provided with a pressure reducing valve 6, so that the cooling water is reduced in pressure to a design pressure and then flows into the cooler groove 8.
The primary cooling water adopts self-flowing water supply:
the water source comes from the upper reaches, and when the system normally worked, once cooling water passed through from flowing water supply pipe 1, and motorised valve 2 was the open mode this moment, and motorised valve 5 and motorised valve 14 are closed state, and flow control valve 3 adjusts the discharge of intaking in the groove according to level sensor 10's liquid level signal to guarantee that the water level harmony height in cooler 9 top satisfies the designing requirement. When the water level is lowered, the opening degree of the flow regulating valve 3 is increased; when the water level rises, the opening degree of the flow regulating valve 3 is reduced; when the water level continues to rise, the opening degree of the flow regulating valve 3 continues to be reduced, and simultaneously the water flow can be discharged through the overflow pipe 11. The overflow pipe 11 and the drain pipe 19 are collected and finally discharged into a downstream river channel, and the lowest nozzle height of the overflow pipe is higher than the highest tail water level of the downstream river channel. When the water level in the cooler tank 8 is finally stabilized at the designed water level, the opening degree of the flow regulating valve 3 can be kept unchanged.
When the cooler 9 overhauls, close motorised valve 2, treat that the inside water of cooler tank 8 passes through the whole evacuation back of drain pipe 19, the maintainer enters into the cooler tank 8 bottom from both sides steel cat ladder 17, with buckle formula basis 18 and cooler inlet tube 16, outlet pipe 20 flange dismantlement back, utilizes the lifting hook and the hoisting accessory at cooler 9 top to hang out cooler 9.
The primary cooling water adopts gravity flow pressure reduction water supply:
when the system works normally, the primary cooling water passes through the second gravity flow water supply pipeline 4, the electric valve 5 is in an open state, the electric valves 2 and 14 are in a closed state, and the primary cooling water is decompressed to a design pressure through the pressure reducing valve 6 on the second gravity flow water supply pipeline 4 and then flows into the cooler tank 8.
When the cooler 9 is overhauled, the electric valve 5 is closed, and after the water in the cooler tank 8 is completely drained through the drain pipe 19, the maintainer enters the bottom of the cooler tank 8 from the steel ladder stands 17 on two sides to carry out overhauling operation.
The primary cooling water is supplied by a water pump:
the water source is from the downstream tail water, when the system normally works, the primary cooling water passes through the pressurized water supply pipeline 12, the electric valve 14 is in an open state, the electric valves 2 and 5 are in a closed state, and the primary cooling water is conveyed from the tail water to the cooler tank 8 in a pressurized mode through the water pump 15.
When the cooler 9 is overhauled, the electric valve 14 is closed, and after the water in the cooler tank 8 is completely drained through the drain pipe 19, the maintainer enters the bottom of the cooler tank 8 from the steel ladder stands 17 on two sides to carry out overhauling operation.
According to the utility model discloses a description and attached drawing, the skilled person makes or uses very easily the utility model discloses a power station secondary circulative cooling water supply system to can produce the positive effect that the utility model discloses record.
Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are used for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (9)
1. The utility model provides a power station secondary circulative cooling water supply system which characterized in that: the device comprises a cooler tank with the elevation higher than the downstream tail water level and a cooler detachably connected inside the cooler tank, wherein a liquid level sensor is arranged inside the cooler tank, and the bottom of the cooler tank is connected with a drain pipe and leads to a downstream tail water channel; the cooler grooves are respectively connected with a self-flowing water supply pipeline with one end connected to the pressure steel pipe and a pressurized water supply pipeline with one end connected to the downstream tail water channel; all be provided with motorised valve and flow control valve on artesian water supply pipe and the pressurization water supply pipe, each motorised valve can freely switch over according to the power station head, each flow control valve can be according to level sensor's liquid level signal comes the control to get into the discharge of water in the cooler tank.
2. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the gravity flow water supply pipeline comprises a first gravity flow water supply pipeline and a second gravity flow water supply pipeline which are connected in parallel, and a pressure reducing valve is arranged on the second gravity flow water supply pipeline, so that cooling water is decompressed to design pressure and then flows into a cooler groove.
3. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: an overflow pipe leading to the drain pipe is connected to the top of the cooler groove.
4. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the cooler is fixed in the cooler slot by a snap-in foundation.
5. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the lowest pipe orifice elevation of the drain pipe is higher than the highest tail water level in the downstream.
6. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the pipe diameters of the gravity water supply pipeline and the pressure water supply pipeline are both larger than the pipe diameter of the drain pipe.
7. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the cooler tank both sides have set firmly the steel cat ladder, and personnel get into the cooler tank when the easy access.
8. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: the cooler is connected to the unit user and the circulating water tank through a water inlet pipe and a water outlet pipe respectively.
9. The secondary circulation cooling water supply system of the hydropower station according to claim 1, characterized in that: and a water pump is arranged on the pressurized water supply pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022714884.0U CN214194771U (en) | 2020-11-20 | 2020-11-20 | Secondary circulating cooling water supply system of hydropower station |
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| CN202022714884.0U CN214194771U (en) | 2020-11-20 | 2020-11-20 | Secondary circulating cooling water supply system of hydropower station |
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| CN214194771U true CN214194771U (en) | 2021-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117536179A (en) * | 2024-01-09 | 2024-02-09 | 陕西省水利电力勘测设计研究院 | Water supply valve system and design method thereof |
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2020
- 2020-11-20 CN CN202022714884.0U patent/CN214194771U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117536179A (en) * | 2024-01-09 | 2024-02-09 | 陕西省水利电力勘测设计研究院 | Water supply valve system and design method thereof |
| CN117536179B (en) * | 2024-01-09 | 2024-05-03 | 陕西省水利电力勘测设计研究院 | Water supply valve system and design method thereof |
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