CN220184145U - Nuclear power plant joint pump house temporary water inlet system - Google Patents
Nuclear power plant joint pump house temporary water inlet system Download PDFInfo
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- CN220184145U CN220184145U CN202223061590.8U CN202223061590U CN220184145U CN 220184145 U CN220184145 U CN 220184145U CN 202223061590 U CN202223061590 U CN 202223061590U CN 220184145 U CN220184145 U CN 220184145U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 239000013535 sea water Substances 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000011148 porous material Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to a temporary water inlet system of a combined pump house of a nuclear power plant, which comprises a siphon water pipe; the inlet of the siphon water pipe stretches into the position below the sea water surface, and the outlet of the siphon water pipe is sequentially connected with a temporary steel gate, a water taking channel of a water taking head of a unit and a combined pump room of a nuclear power plant; the water intake channel inlet of the water intake head of the unit is provided with a formal steel gate, and the outlet of the siphon pipe is arranged behind the formal steel gate; an inlet gate valve (3) is arranged at the highest position of the siphon pipe, a vacuum pump (8) is connected to one side, close to sea water, of the inlet gate valve (3), and a submersible pump (1) is connected to one side, close to a combined pump house of a nuclear power plant, of the inlet gate valve (3); the temporary steel gate is of an open pore structure; and an outlet gate valve (9) is arranged at the outlet of the siphon pipe. The temporary water inlet system of the combined pump house of the nuclear power plant can timely introduce seawater into the combined pump house of the nuclear power plant, ensure that important water systems of the plant are put into operation on schedule, and greatly shorten the debugging period of a nuclear island.
Description
Technical Field
The utility model relates to the technical field of nuclear island important factory water system operation, in particular to a temporary water inlet system of a combined pump house of a nuclear power plant.
Background
The important factory water is the final cold source of the nuclear island, and plays an extremely important role in the follow-up debugging work of the nuclear island. Important plant water comes from a nuclear power plant pump room, specifically, seawater is introduced into a water inlet channel of a water taking head of a unit, a steel gate is arranged between the water inlet channel of the water taking head of the unit and the nuclear power plant pump room, and the steel gate does not have the capability of reverse water stopping and can not be opened to introduce the seawater into the water inlet channel, so that the seawater is unidirectionally introduced into the nuclear power plant pump room. The nuclear power plant combined pump house provides important water for an important water system for the plant on schedule, and the important water system for the plant is put into operation on schedule, so that the follow-up debugging work of the nuclear island is ensured.
However, during the engineering construction of the nuclear power plant, the dry construction cofferdam outside the unit water intake head cannot be removed on time, so that seawater cannot be introduced into the water intake canal of the unit water intake head on time, the combined pump house of the nuclear power plant cannot provide important plant water for an important plant water system on time, and the important plant water system cannot be put into operation on time, so that the follow-up debugging work of the nuclear island is affected.
Disclosure of Invention
Based on the above, it is necessary to provide a temporary water inlet system for a combined pump house of a nuclear power plant, which can timely introduce seawater into the combined pump house of the nuclear power plant, ensure that important water systems of the plant are put into operation on schedule, and greatly shorten the debugging period of a nuclear island.
In order to achieve the above object, the present utility model provides the following technical solutions:
a temporary water inlet system of a combined pump house of a nuclear power plant comprises a siphon pipe; the inlet of the siphon water pipe stretches into the position below the sea water surface, and the outlet of the siphon water pipe is sequentially connected with a temporary steel gate, a water taking channel of a water taking head of a unit and a combined pump room of a nuclear power plant; the water intake channel inlet of the water intake head of the unit is provided with a formal steel gate, and the outlet of the siphon pipe is arranged behind the formal steel gate; an inlet gate valve is arranged at the highest position of the siphon pipe, a vacuum pump is connected to one side of the inlet gate valve close to sea water, and a submersible pump is connected to one side of the inlet gate valve close to a combined pump house of a nuclear power plant; the temporary steel gate is of an open pore structure; and an outlet gate valve is arranged at the outlet of the siphon pipe.
Working principle: the temporary water inlet system establishes a siphon effect through vacuumizing, and uses a siphon pipe to guide seawater to the rear of the formal steel gate, and as the formal steel gate does not have the capability of reverse water stop and can not be perforated to guide the seawater into a water taking channel of the water taking head of the unit, the siphon pipe bypasses the formal steel gate to be sequentially connected with the temporary steel gate, a water taking channel of the water taking head of the unit and a combined pump room of the nuclear power plant, and the seawater is sent to the combined pump room of the nuclear power plant through the water taking channel of the water taking head of the unit.
Further, the siphon pipe is formed by welding a spiral steel pipe, and the inner surface and the contact part between the outer surface of the siphon pipe and seawater are coated with anti-corrosion materials.
Further, the inlet of the siphon pipe is provided with a filter screen frame so as to prevent sediment and sundries from being sucked into the siphon pipe.
Further, the highest position of the siphon pipe is provided with an inlet gate valve, one side of the inlet gate valve, which is close to seawater, is provided with a vacuum pump reserved interface, one side of the inlet gate valve, which is far away from seawater, is provided with a water filling interface, and the inlet gate valve is closed to form a sealing space for pipelines at two sides.
Further, the reserved interface of the vacuum pump is connected with the vacuum stop valve through a steel wire hose, and the steam-water separator and the vacuum pump are sequentially connected behind the vacuum stop valve and used for buffering liquid level when the vacuum pump is used for pumping vacuum, so that the vacuum pump is prevented from pumping seawater to damage the seawater, and meanwhile, a liquid seal is formed after the vacuum is established to maintain the vacuum of the siphon water pipe.
Further, a first drain valve is arranged in front of the steam-water separator.
Further, a steel pipe is arranged on one side, far away from the sea water, of the inlet gate valve to serve as a water filling interface, the water filling interface is connected with a submersible pump through a fire fighting belt, the sea water is filled into the siphon water pipe through the submersible pump, and after the whole pipe section is filled with water, the whole pipe section is sealed through a blind plate.
Further, the siphon pipe is provided with an outlet gate valve at the position of 11m which is close to the lowest point of the water taking head of the unit and is used for isolation before water inflow of a pump room, and a second drain valve is arranged in front of the outlet gate valve, so that the water draining and the maintenance are facilitated.
Further, the siphon water pipe is connected with the temporary gate through the expansion joint, so that the normal opening and closing functions of the temporary gate are maintained.
The beneficial technical effects of the utility model are as follows:
according to the temporary water inlet system of the combined pump room of the nuclear power plant, which is disclosed by the utility model, the siphon action is utilized to operate, an external power supply is not needed, and on the premise that a dry construction cofferdam outside a water taking head of a unit cannot be removed on time, seawater is introduced into a water inlet channel of the water taking head of the unit, so that water inlet nodes of the combined pump room of the nuclear power plant are realized 20 days in advance, the on-schedule operation of the important water system of the plant is ensured, and the debugging period of a nuclear island is greatly shortened.
Drawings
FIG. 1 is a schematic diagram of a temporary water intake system of a combined pump house of a nuclear power plant.
In the figure, 1, a submersible pump; 2. a steel pipe; 3. an inlet gate valve; 4. a filter screen frame; 5. a vacuum stop valve; 6. a steam-water separator; 7. a first drain valve; 8. a vacuum pump; 9. an outlet gate valve; 10. a second drain valve.
Detailed Description
In the description of the present utility model, it should be understood that the terms "left", "right", "above", "below", "outside", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The utility model is described in further detail below with reference to the drawings and examples.
Example 1
Referring to fig. 1, the utility model provides a temporary water inlet system of a combined pump house of a nuclear power plant, which comprises a siphon pipe; the inlet of the siphon water pipe stretches into the position below the sea water surface, and the outlet of the siphon water pipe is sequentially connected with a temporary steel gate, a water taking channel of a water taking head of a unit and a combined pump room of a nuclear power plant; the water intake channel inlet of the water intake head of the unit is provided with a formal steel gate, and the outlet of the siphon pipe is arranged behind the formal steel gate; an inlet gate valve 3 is arranged at the highest position of the siphon pipe, a vacuum pump 8 is connected to one side of the inlet gate valve 3 close to sea water, and a submersible pump 1 is connected to one side of the inlet gate valve 3 close to a combined pump house of a nuclear power plant; the temporary steel gate is of an open pore structure; the outlet of the siphon pipe is provided with an outlet gate valve 9.
The siphon pipe is formed by welding 10 spiral steel pipes with nominal diameters of 700mm, and the inner surface and the contact part of the outer surface of the siphon pipe and seawater are subjected to corrosion prevention treatment.
In order to prevent air from entering a siphon pipe to break vacuum in the low tide after 100 years, the inlet of the siphon pipe extends to 6.0m below the sea water surface, and a 100X 100 specification filter screen frame 4 is arranged at the inlet of the siphon pipe to prevent sediment and sundries from being sucked into the siphon pipe.
The highest position of the siphon pipe is provided with an inlet gate valve 3, one side of the inlet gate valve 3 close to seawater is provided with a vacuum pump reserved interface, one side of the inlet gate valve 3 far away from seawater is provided with a water filling interface, and the inlet gate valve 3 is closed to form a sealing space for pipelines at two sides.
The vacuum pump reserved interface is connected with the vacuum stop valve 5 through a steel wire hose with the nominal diameter of 25mm, and the steam-water separator 6 and the vacuum pump 8 are sequentially connected behind the vacuum stop valve 5 and used for buffering liquid level when the vacuum pump 8 vacuumizes, so that the vacuum pump 8 is prevented from sucking seawater to damage the seawater, and meanwhile, a liquid seal is formed after the vacuum is established to maintain the vacuum of the siphon water pipe.
A first drain valve 7 is arranged in front of the steam-water separator 6.
The inlet gate valve 3 is far away from the sea water one side and sets up the steel pipe 2 of nominal diameter 150mm as the interface of watering, connects immersible pump 1 through the fire control area after the interface of watering, uses immersible pump 1 to pour sea water into siphon, uses the blind plate to seal after whole pipeline section fills water.
The siphon pipe is provided with an outlet gate valve 9 at the position which is close to the lowest point-11 m of the water taking head of the unit and is used for isolation before water inflow of a pump room, and a second drain valve 10 is arranged in front of the outlet gate valve 9, so that water drainage is convenient to overhaul.
The siphon water pipe is connected with the temporary gate through the expansion joint, so that the normal opening and closing functions of the temporary gate are maintained.
By using the temporary water inlet system of the combined pump house of the nuclear power plant, siphonage is established through vacuumizing and water injection modes. Closing the inlet gate valve 3, vacuumizing a siphon pipe in front of the inlet gate valve 3 through a vacuum pump 8, closing a vacuum stop valve 5 after the siphon pipe is filled with water, and stopping the vacuum pump 8; and after the inlet gate valve 3 is opened, the siphon water pipe is filled with seawater through the submersible sewage pump, and the siphon water pipe is sealed by a blind plate after being filled with water.
After the temporary water inlet system of the combined pump room of the nuclear power plant establishes vacuum, the inlet gate valve 3 is opened, the outlet gate valve 9 is slowly opened, and seawater is confirmed to enter the combined pump room of the nuclear power plant through a siphon effect, and the outlet gate valve 9 is fully opened.
After the siphon is established by the temporary water inlet system of the combined pump house of the nuclear power plant, water inlet of the combined pump house of the nuclear power plant can be realized without external force, and a continuous seawater source is provided for downstream users.
The temporary water inlet system of the combined pump house of the nuclear power plant has 4431.6m when the flow is high in tide level 3 2761.8m at low tide level 3 And/h, which are all more than 2260m of the running flow of the double pumps of the important plant water 3 /h。
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (9)
1. The temporary water inlet system of the combined pump house of the nuclear power plant is characterized by comprising a siphon water pipe; the inlet of the siphon water pipe stretches into the position below the sea water surface, and the outlet of the siphon water pipe is sequentially connected with a temporary steel gate, a water taking channel of a water taking head of a unit and a combined pump room of a nuclear power plant; the water intake channel inlet of the water intake head of the unit is provided with a formal steel gate, and the outlet of the siphon pipe is arranged behind the formal steel gate; an inlet gate valve (3) is arranged at the highest position of the siphon pipe, a vacuum pump (8) is connected to one side, close to sea water, of the inlet gate valve (3), and a submersible pump (1) is connected to one side, close to a combined pump house of a nuclear power plant, of the inlet gate valve (3); the temporary steel gate is of an open pore structure; and an outlet gate valve (9) is arranged at the outlet of the siphon pipe.
2. The temporary water inlet system of a combined pump house of a nuclear power plant according to claim 1, wherein the siphon pipe is formed by welding a spiral steel pipe, and the inner surface and the contact part of the outer surface of the siphon pipe and seawater are coated with anti-corrosion materials.
3. The temporary water intake system of a combined pump house for a nuclear power plant according to claim 1, characterized in that the siphon water intake is provided with a screen frame (4).
4. The temporary water inlet system of the combined pump house of the nuclear power plant according to claim 1, wherein an inlet gate valve (3) is arranged at the highest position of the siphon pipe, a vacuum pump reserved interface is arranged on one side, close to seawater, of the inlet gate valve (3), a water filling interface is arranged on one side, far away from seawater, of the inlet gate valve (3), and the inlet gate valve (3) is closed to form a sealing space for pipelines on two sides.
5. The temporary water inlet system of a combined pump house of a nuclear power plant according to claim 4, wherein the vacuum pump reserved interface is connected with a vacuum stop valve (5) through a steel wire hose, and the vacuum stop valve (5) is sequentially connected with a steam-water separator (6) and a vacuum pump (8).
6. The temporary water inlet system of a combined pump house for a nuclear power plant according to claim 5, wherein a first drain valve (7) is arranged in front of the steam-water separator (6).
7. The temporary water inlet system of the combined pump house of the nuclear power plant according to claim 4, wherein a steel pipe (2) is arranged on one side, far away from seawater, of the inlet gate valve (3) to serve as a water filling interface, and the water filling interface is connected with a submersible pump (1) through a fire fighting belt.
8. The temporary water inlet system of the combined pump house of the nuclear power plant according to any one of claims 1 to 7, wherein the siphon pipe is provided with an outlet gate valve (9) at a position close to the lowest point-11 m of the water intake head of the unit, and a second drain valve (10) is arranged in front of the outlet gate valve (9).
9. The temporary water intake system of a combined pump house of a nuclear power plant according to claim 8, wherein the siphon pipe is connected with the temporary gate through an expansion joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061590.8U CN220184145U (en) | 2022-11-18 | 2022-11-18 | Nuclear power plant joint pump house temporary water inlet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061590.8U CN220184145U (en) | 2022-11-18 | 2022-11-18 | Nuclear power plant joint pump house temporary water inlet system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220184145U true CN220184145U (en) | 2023-12-15 |
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ID=89109795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223061590.8U Active CN220184145U (en) | 2022-11-18 | 2022-11-18 | Nuclear power plant joint pump house temporary water inlet system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220184145U (en) |
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2022
- 2022-11-18 CN CN202223061590.8U patent/CN220184145U/en active Active
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