CN211900833U - Prevent fuel feeding system that evacuates - Google Patents
Prevent fuel feeding system that evacuates Download PDFInfo
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- CN211900833U CN211900833U CN201922387244.0U CN201922387244U CN211900833U CN 211900833 U CN211900833 U CN 211900833U CN 201922387244 U CN201922387244 U CN 201922387244U CN 211900833 U CN211900833 U CN 211900833U
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Abstract
The utility model discloses a fuel feed system who prevents evacuation, include: the fuel tank is arranged underground, the daily fuel tank and the fuel pump are arranged on the ground, an oil supply pipe and an oil return pipe are arranged between the fuel tank and the daily fuel tank, the fuel pump is arranged on the oil supply pipe, and an oil supplement pipe is arranged between the daily fuel tank and an oil inlet of the fuel pump; when the fuel tank is firstly supplied with fuel to the daily fuel tank, the daily fuel tank is filled with fuel through the fuel pump, when the daily fuel tank is filled with fuel to a preset low liquid level, the fuel pump is stopped to work, then the fuel supplementing pipe is opened, the fuel supplying pipe from the fuel pump to the fuel tank is supplemented with fuel by the self weight of the daily fuel tank, when the liquid level of the daily fuel tank is observed not to descend any more, the fuel pump is filled with fuel in the fuel supplying pipe between the fuel tanks, and air can be discharged. The utility model provides a problem that fuel oil system managed to find time guarantees that the fuel pump normally works, realizes regularly supplementing oil to daily oil tank ration, guarantees emergent diesel generating set continuous operation work under the emergency situation.
Description
Technical Field
The utility model belongs to the technical field of nuclear power plant's fuel is supplied with, a prevent fuel feeding system of evacuation is related to.
Background
Aiming at the requirement that the nuclear power plant emergency diesel generating set needs to guarantee the continuous power supply of the nuclear power plant emergency load under the rated working condition, a set of fuel oil guarantee supply system is provided. The system equipment supplies and supplements oil to the daily oil tank by pumping oil from the underground oil storage tank through the fuel oil transfer pump so as to ensure the continuous oil supply of the daily oil tank and further realize the power supply requirement of 180h of continuous operation of the emergency diesel generator set.
According to the overall solidification scheme of a nuclear power site, a daily oil tank and a fuel pump are arranged in an overground room, the height difference between the daily oil tank and an underground fuel tank is 4-4.5 meters, and the transverse distance difference is 10-13 meters. Because the connecting pipelines of the daily oil tank, the fuel pump and the underground fuel tank are long and have height difference, when the fuel pump works for the first time (namely, the fuel pump supplies fuel from the underground fuel tank to the daily oil tank), air exists in the pipelines, and the phenomenon of evacuation exists, so that continuous fuel oil discharge cannot be ensured.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
The utility model aims at: the utility model provides a prevent fuel feeding system that evacuates, when fuel pump and underground fuel tank connecting line is longer and have the difference in height, avoid the fuel pump to have the air in the pipeline when following the underground fuel tank for the first time and supply oil to the sun with the oil tank, have to find time the phenomenon and can't guarantee that the fuel goes out oil in succession.
(II) technical scheme
In order to solve the technical problem, the utility model provides a prevent fuel feeding system that evacuates, it includes: the fuel tank is arranged underground, the daily fuel tank and the fuel pump are arranged on the ground, an oil supply pipe and an oil return pipe are arranged between the fuel tank and the daily fuel tank, the fuel pump is arranged on the oil supply pipe, and an oil supplement pipe is arranged between the daily fuel tank and an oil inlet of the fuel pump; when the fuel tank is firstly supplied with fuel to the daily fuel tank, the daily fuel tank is firstly filled with fuel through the fuel pump, when the daily fuel tank is filled with fuel to a preset low liquid level, the fuel pump is stopped to work, then the fuel supplementing pipe is opened, the fuel supplying pipe from the fuel pump to the fuel tank is supplemented with fuel by the self weight of the daily fuel tank, when the liquid level of the daily fuel tank is observed not to descend any more, the fuel supplying pipe from the fuel pump to the fuel tank is filled with fuel, and air is discharged.
(III) advantageous effects
The fuel supply system for preventing evacuation provided by the technical scheme is additionally provided with the set of auxiliary oil supply pipeline, the problem that a fuel system is evacuated can be solved on the premise of not changing the overall arrangement of a nuclear power site, the normal work of a fuel pump is ensured, the regular and quantitative oil supply to a daily oil tank is realized, and the continuous operation work of an emergency diesel generator set under the emergency condition is ensured.
Drawings
Fig. 1 is a schematic diagram of the evacuation-proof fuel supply system of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the utility model discloses prevent fuel supply system that evacuates includes: the fuel tank is arranged underground, the daily fuel tank and the fuel pump are arranged on the ground, an oil supply pipe and an oil return pipe are arranged between the fuel tank and the daily fuel tank, the fuel pump is arranged on the oil supply pipe, and an oil supplement pipe is arranged between the daily fuel tank and an oil inlet of the fuel pump; when the fuel tank is firstly supplied with fuel to the daily fuel tank, the daily fuel tank is firstly filled with fuel through the fuel pump, when the daily fuel tank is filled with fuel to a preset low liquid level, the fuel pump is stopped to work, then the fuel supplementing pipe is opened, the fuel supplying pipe from the fuel pump to the fuel tank is supplemented with fuel by the self weight of the daily fuel tank, when the liquid level of the daily fuel tank is observed not to descend any more, the fuel supplying pipe from the fuel pump to the fuel tank is filled with fuel, and air is discharged.
The two fuel pumps are connected in parallel to an oil supply pipe between the fuel tank and the daily fuel tank, one fuel pump serves as a main fuel pump, the other fuel pump serves as a standby fuel pump, the main fuel pump works under normal conditions, the standby fuel pump is standby, and the standby fuel pump is started when the main fuel pump has an accident.
The fuel supply pipe between the fuel tank and the fuel pump is provided with a filter for filtering the fuel fed into the fuel pump.
The oil supply pipe between the fuel tank and the filter is provided with a first valve, and one end of the oil supply pipe, which is connected into the daily oil tank, is provided with a second valve.
The daily oil tank is provided with a liquid level meter and a fireproof ventilation cap.
The fuel tank is provided with a fuel filling joint, a liquid level meter, a fuel measuring cap and a fireproof ventilation cap.
The fuel supply system also comprises a control cabinet which is connected with the fuel pump and used for controlling the fuel pump to work.
The oil inlet of the fuel pump is connected with a rubber hose through a quick connector, and the rubber hose is introduced into the oil drum for oil return.
Through the system, when the fuel tank is used for supplying fuel to the sunward fuel tank for the first time, the fuel can be always supplied with oil through first oil supplement, and the situation that the fuel pump evacuates during working is guaranteed.
According to the above technical scheme, the utility model discloses can satisfy the nuclear power plant overall arrangement and the designing requirement in the aspect of the design such as reliability, guarantee nature, security and environmental suitability, when nuclear power plant loses normal power, for the continuous 180h operation power supplies of emergency load, provide necessary emergency power supply guarantee for nuclear power plant normal operating, also for other nuclear power plants put into production on schedule, the continuous development provides demonstration effect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. An anti-evacuation fuel delivery system, comprising: the fuel tank is arranged underground, the daily fuel tank and the fuel pump are arranged on the ground, the fuel supply pipe and the oil return pipe are arranged between the fuel tank and the daily fuel tank, the fuel pump is arranged on the fuel supply pipe, and the oil supplementing pipe is arranged between the daily fuel tank and the fuel pump oil inlet.
2. The pump-down resistant fuel supply system of claim 1, wherein two of said fuel pumps are provided and connected in parallel in a fuel supply line between the fuel tank and the day tank, one of said fuel pumps being a primary fuel pump and the other being a backup fuel pump, the primary fuel pump operating normally with the backup fuel pump in reserve, the backup fuel pump being activated in the event of an accident condition with the primary fuel pump.
3. The anti-empty fuel supply system of claim 2, wherein the fuel supply line between the fuel tank and the fuel pump is provided with a filter for filtering fuel fed to the fuel pump.
4. The evacuation resistant fuel supply system of claim 3, wherein a first valve is provided in the fuel supply line between the fuel tank and the filter, and a second valve is provided in the end of the fuel supply line that enters the day tank.
5. The evacuation resistant fuel supply system of claim 4, wherein a liquid level gauge and a fire-resistant vent cap are provided on said day tank.
6. The evacuation resistant fuel supply system of claim 5, wherein said fuel tank is provided with a fuel fill fitting, a liquid level gauge, a fuel metering cap, and a fire vent cap.
7. The evacuation resistant fuel supply system of claim 6, further comprising a control cabinet coupled to the fuel pump for controlling operation of the fuel pump.
8. The pump-down resistant fuel supply system of claim 7 wherein a rubber hose is connected to the fuel pump at the fuel inlet via a quick connector, the rubber hose passing into the oil drum for return of oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387244.0U CN211900833U (en) | 2019-12-26 | 2019-12-26 | Prevent fuel feeding system that evacuates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387244.0U CN211900833U (en) | 2019-12-26 | 2019-12-26 | Prevent fuel feeding system that evacuates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211900833U true CN211900833U (en) | 2020-11-10 |
Family
ID=73295234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922387244.0U Active CN211900833U (en) | 2019-12-26 | 2019-12-26 | Prevent fuel feeding system that evacuates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211900833U (en) |
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2019
- 2019-12-26 CN CN201922387244.0U patent/CN211900833U/en active Active
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