A fresh water pressure-stabilizing water supply system for seawater fire fighting system

Abstract

The utility model discloses a freshwater pressure-stabilizing water supply system for a seawater fire fighting system, which belongs to the technical field of LNG receiving stations, and includes a fire fighting freshwater storage tank and a fire fighting water main ring network. A main pipeline and a spare pipeline are arranged between the fire fighting freshwater storage tank and the fire fighting water main ring network. The two ends of the main pipeline are respectively connected to the fire fighting freshwater storage tank and the fire fighting water main ring network, one end of the spare pipeline is connected to the main pipeline, and the end of the spare pipeline away from the main pipeline is connected to the fire fighting water main ring network. A cut-off valve is arranged on the spare pipeline, and the cut-off valve has a cut-off state and a connected state. The freshwater pressure-stabilizing water supply system provided by the utility model is reasonably designed, and there is no need to set up a spare pipeline separately. The area occupied by the freshwater pump room is reduced, the investment in fixed assets is saved, the space utilization rate is high, and it is conducive to a more reasonable arrangement of the process equipment of the freshwater pump room, and it is easy to promote and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of LNG receiving stations, and in particular relates to a fresh water pressure-stabilizing water supply system for a seawater fire fighting system. Background Art

[0002] The freshwater pressure-stabilizing water supply system of the LNG receiving station is an auxiliary process system that provides the required pressure-maintaining and pressure-stabilizing freshwater for the seawater firefighting system. The space in the freshwater firefighting pump room is very limited, and the process equipment and its affiliated pipelines are arranged very compactly. When arranging the freshwater pressure-stabilizing water supply system, the problem of insufficient space or interference is often encountered, and the building area of ​​the freshwater firefighting pump room has to be expanded, resulting in a significant increase in investment costs. The medium transported by the firefighting test pump pipeline is also fresh water taken from the firefighting freshwater storage tank, but the pipeline of the firefighting test pump is only used under test conditions.

[0003] Therefore, from the perspective of reducing costs, increasing efficiency and improving asset utilization, it is urgent to design a freshwater pressure-stabilizing water supply system for the seawater fire-fighting system to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a freshwater pressure-stabilizing water supply system for a seawater fire fighting system, which has the advantages of saving investment in fixed assets and high space utilization, and solves the problems mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, the specific technical scheme of the fresh water pressure stabilizing water supply system of the seawater fire fighting system of the utility model is as follows:

[0006] A freshwater pressure-stabilizing water supply system for a seawater fire fighting system comprises a fire fighting freshwater storage tank and a fire fighting water main ring network, a main pipeline and a spare pipeline are arranged between the fire fighting freshwater storage tank and the fire fighting water main ring network, two ends of the main pipeline are respectively connected with the fire fighting freshwater storage tank and the fire fighting water main ring network, one end of the spare pipeline is connected with the main pipeline, and one end of the spare pipeline away from the main pipeline is connected with the fire fighting water main ring network, a cut-off valve is arranged on the spare pipeline, and the cut-off valve has a cut-off state and a connected state;

[0007] When the isolating valve is in the isolating state, the spare pipeline is not connected to the main pipeline; when the isolating valve is in the connecting state, the spare pipeline is connected to the main pipeline.

[0008] Furthermore, the main line includes a fire-fighting pressure-stabilizing main pump, a first inlet pipe is connected to the suction end of the fire-fighting pressure-stabilizing main pump, the end of the first inlet pipe away from the fire-fighting pressure-stabilizing main pump is connected to the fire-fighting fresh water storage tank, a first outlet pipe is connected to the discharge end of the fire-fighting pressure-stabilizing main pump, the end of the first outlet pipe away from the fire-fighting pressure-stabilizing main pump is connected to the fire-fighting water main ring network.

[0009] Furthermore, the backup pipeline includes a fire-fighting pressure-stabilizing standby pump, a first inlet branch is connected to the suction end of the fire-fighting pressure-stabilizing standby pump, an end of the first inlet branch away from the fire-fighting pressure-stabilizing standby pump is connected to the first inlet pipe, a second outlet pipe is connected to the discharge end of the fire-fighting pressure-stabilizing standby pump, an end of the second outlet pipe away from the fire-fighting pressure-stabilizing standby pump is connected to the fire water main ring network.

[0010] Furthermore, the isolating valve is arranged on the first inlet branch, and the inlet end and the outlet end of the isolating valve are both connected to the first inlet branch. When the isolating valve is in the isolating state, the first inlet pipe is not connected to the first inlet branch. When the isolating valve is in the connecting state, the first inlet pipe is connected to the first inlet branch.

[0011] Furthermore, the isolation valve is connected to the first inlet pipe and the first inlet branch pipe via flanges.

[0012] Furthermore, a test pipeline is provided between the fire fresh water storage tank and the fire water main ring network, and both ends of the test pipeline are connected to the fire fresh water storage tank and the fire water main ring network respectively.

[0013] Furthermore, the test pipeline includes a fire test pump, a second inlet pipe is connected to the suction end of the fire test pump, the end of the second inlet pipe away from the fire test pump is connected to the fire fresh water storage tank, a third outlet pipe is connected to the discharge end of the fire test pump, and the end of the third outlet pipe away from the fire test pump is connected to the fire water main ring network.

[0014] Further, the test pipeline is connected to the spare pipeline.

[0015] Furthermore, the second inlet pipe is connected to a second inlet branch pipe, and one end of the second inlet branch pipe away from the second inlet pipe is connected to the first inlet branch pipe.

[0016] The utility model has the following advantages: the fresh water pressure-stabilizing water supply system is reasonably designed, there is no need to set up a separate spare pipeline, the area occupied by the fresh water pump room is reduced, the investment in fixed assets is saved, the space utilization rate is high, it is conducive to a more reasonable arrangement of the process equipment of the fresh water pump room, and it is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the fresh water pressure-stabilizing water supply system of the utility model;

[0018] Explanation of markings in the figure: 1. Main pipeline; 11. Fire-fighting pressure-stabilizing main pump; 12. First inlet pipe; 13. First outlet pipe; 2. Spare pipeline; 21. Fire-fighting pressure-stabilizing spare pump; 22. First inlet branch pipe; 23. Second outlet pipe; 24. Isolation valve; 3. Test pipeline; 31. Fire-fighting test pump; 32. Second inlet pipe; 33. Third outlet pipe; 34. Second inlet branch pipe; 4. Fire-fighting fresh water storage tank; 5. Fire-fighting water main ring network. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 The utility model describes a fresh water pressure-stabilizing water supply system of a seawater fire fighting system.

[0022] At present, the layout of the fresh water pressure-stabilizing water supply system often encounters the problem of insufficient space or interference, and the building area of ​​the fresh water fire pump room has to be expanded, which leads to a significant increase in investment costs. The medium transported by the fire test pump pipeline is also fresh water taken from the fire fresh water storage tank, but the pipeline of the fire test pump is only used under test conditions.

[0023] Therefore, the fresh water pressure-stabilizing water supply system includes a fire fresh water storage tank 4 and a fire water main ring network 5. A main pipeline 1 and a backup pipeline 2 are arranged between the fire fresh water storage tank 4 and the fire water main ring network 5. The two ends of the main pipeline 1 are respectively connected to the fire fresh water storage tank 4 and the fire water main ring network 5, one end of the backup pipeline 2 is connected to the main pipeline 1, and the end of the backup pipeline 2 away from the main pipeline 1 is connected to the fire water main ring network 5, so there is no need to separately set up a connecting pipeline between the backup pipeline 2 and the fire fresh water storage tank 4, so that the occupied area of ​​the fresh water pump room is reduced, the investment in fixed assets is saved, the space utilization rate is high, it is conducive to a more reasonable arrangement of the process equipment of the fresh water pump room, and it is easy to promote and use.

[0024] A shutoff valve 24 is provided on the backup pipeline 2, and the shutoff valve 24 has a shutoff state and a connected state; when the shutoff valve 24 is in the shutoff state, the backup pipeline 2 is not connected with the main pipeline 1; when the shutoff valve 24 is in the connected state, the backup pipeline 2 is connected with the main pipeline 1.

[0025] The main pipeline 1 includes a fire-fighting pressure-stabilizing main pump 11, and a first inlet pipe 12 is connected to the suction end of the fire-fighting pressure-stabilizing main pump 11. The end of the first inlet pipe 12 away from the fire-fighting pressure-stabilizing main pump 11 is connected to the fire-fighting fresh water storage tank 4. A first outlet pipe 13 is connected to the discharge end of the fire-fighting pressure-stabilizing main pump 11, and the end of the first outlet pipe 13 away from the fire-fighting pressure-stabilizing main pump 11 is connected to the fire-fighting water main ring network 5. After the fire-fighting pressure-stabilizing main pump 11 is started, the fire-fighting pressure-stabilizing main pump 11 sucks the fresh water in the fire-fighting fresh water storage tank 4 into the fire-fighting pressure-stabilizing main pump 11 through the first inlet pipe 12, and then the fresh water in the fire-fighting pressure-stabilizing main pump 11 is discharged into the fire-fighting water main ring network 5 through the first outlet pipe 13.

[0026] The backup pipeline 2 includes a fire-fighting pressure-stabilizing standby pump 21, and a first inlet branch pipe 22 is connected to the suction end of the fire-fighting pressure-stabilizing standby pump 21. The end of the first inlet branch pipe 22 away from the fire-fighting pressure-stabilizing standby pump 21 is connected to the first inlet pipe 12, and a second outlet pipe 23 is connected to the discharge end of the fire-fighting pressure-stabilizing standby pump 21. The end of the second outlet pipe 23 away from the fire-fighting pressure-stabilizing standby pump 21 is connected to the fire-fighting water main ring network 5. After the fire-fighting pressure-stabilizing standby pump 21 is started, the fire-fighting pressure-stabilizing standby pump 21 sucks the fresh water in the fire-fighting fresh water storage tank 4 into the fire-fighting pressure-stabilizing standby pump 21 through the first inlet branch pipe 22 and the first inlet pipe 12, and then the fresh water in the fire-fighting pressure-stabilizing standby pump 21 is discharged into the fire-fighting water main ring network 5 through the second outlet pipe 23.

[0027] The isolation valve 24 is arranged on the first inlet branch pipe 22. The inlet end and the outlet end of the isolation valve 24 are both connected to the first inlet branch pipe 22. When the isolation valve 24 is in the isolation state, the first inlet pipe 12 is not connected to the first inlet branch pipe 22. When the isolation valve 24 is in the connected state, the first inlet pipe 12 is connected to the first inlet branch pipe 22. At this time, water can be discharged into the fire water main ring network 5 through the main pipeline 1 and the backup pipeline 2.

[0028] When the standby pipeline 2 is temporarily out of service due to a fault or maintenance, the isolation valve 24 is closed, and fresh water directly enters the fire water main ring network 5 through the main pipeline 1.

[0029] Preferably, the isolation valve 24 is connected to both the first inlet pipe 12 and the first inlet branch pipe 22 via flanges.

[0030] A test pipeline 3 is provided between the fire fresh water storage tank 4 and the fire water main ring network 5, and both ends of the test pipeline 3 are connected to the fire fresh water storage tank 4 and the fire water main ring network 5 respectively.

[0031] The test pipeline 3 includes a fire test pump 31, and a second inlet pipe 32 is connected to the suction end of the fire test pump 31. The end of the second inlet pipe 32 away from the fire test pump 31 is connected to the fire fresh water storage tank 4. A third outlet pipe 33 is connected to the discharge end of the fire test pump 31. The end of the third outlet pipe 33 away from the fire test pump 31 is connected to the fire water main ring network 5, so that when testing, the fresh water in the fire fresh water storage tank 4 is sucked into the fire test pump 31 through the second water inlet pipe, and then the fresh water in the fire test pump 31 is discharged into the fire water main ring network 5 through the third outlet pipe 33.

[0032] The test pipeline 3 is connected to the spare pipeline 2 .

[0033] Preferably, the second inlet pipe 32 is connected to a second inlet branch pipe 34, and one end of the second inlet branch pipe 34 away from the second inlet pipe 32 is connected to the first inlet branch pipe 22. When the main line 1 and the backup line 2 are working normally, the isolation valve 24 is opened, and the main line 1, the backup line 2 and the test line 3 are all connected. At this time, water can be discharged into the fire water main ring network 5 through the main line 1, the backup line 2 and the test line 3. When the backup line 2 is temporarily unable to work due to a fault or maintenance, the isolation valve 24 is closed, and fresh water directly enters the fire water main ring network 5 through the main line 1. When the main pipeline 1 is temporarily unable to work due to a fault or maintenance, the isolation valve 24 is closed, and the fire pressure stabilizing standby pump 21 draws the fresh water in the fire fresh water storage tank 4 into the fire pressure stabilizing standby pump 21 through the second inlet branch pipe 34 and the second inlet pipe 32. Then the fresh water in the fire pressure stabilizing standby pump 21 is discharged into the fire water main ring network 5 through the second outlet pipe 23, so that the test pipeline 3 can also supply the fresh water pressure stabilizing water supply system, and there is no need to set up a separate connecting pipeline between the fire pressure stabilizing standby pump 21 and the fire fresh water storage tank 4.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A freshwater pressure-stabilizing water supply system for a seawater fire fighting system, characterized in that: It includes a fire fresh water storage tank and a fire water main ring network. A main pipeline and a spare pipeline are arranged between the fire fresh water storage tank and the fire water main ring network. Both ends of the main pipeline are respectively connected to the fire fresh water storage tank and the fire water main ring network. One end of the spare pipeline is connected to the main pipeline. The end of the spare pipeline away from the main pipeline is connected to the fire water main ring network. A cut-off valve is arranged on the spare pipeline. The cut-off valve has a cut-off state and a connected state. When the isolating valve is in the isolating state, the spare pipeline is not connected to the main pipeline; when the isolating valve is in the connecting state, the spare pipeline is connected to the main pipeline.

2. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 1 is characterized in that: The main pipeline includes a fire-fighting pressure-stabilizing main pump, a first inlet pipe is connected to the suction end of the fire-fighting pressure-stabilizing main pump, an end of the first inlet pipe away from the fire-fighting pressure-stabilizing main pump is connected to the fire-fighting fresh water storage tank, a first outlet pipe is connected to the discharge end of the fire-fighting pressure-stabilizing main pump, an end of the first outlet pipe away from the fire-fighting pressure-stabilizing main pump is connected to the fire-fighting water main ring network.

3. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 2 is characterized in that: The backup pipeline includes a fire pressure stabilizing standby pump, a first inlet branch pipe is connected to the suction end of the fire pressure stabilizing standby pump, an end of the first inlet branch pipe away from the fire pressure stabilizing standby pump is connected to the first inlet pipe, a second outlet pipe is connected to the discharge end of the fire pressure stabilizing standby pump, an end of the second outlet pipe away from the fire pressure stabilizing standby pump is connected to the fire water main ring network.

4. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 3 is characterized in that: The isolating valve is arranged on the first inlet branch pipe, and the inlet end and the outlet end of the isolating valve are both connected to the first inlet branch pipe. When the isolating valve is in the isolating state, the first inlet pipe is not connected to the first inlet branch pipe. When the isolating valve is in the connecting state, the first inlet pipe is connected to the first inlet branch pipe.

5. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 4 is characterized in that: The isolation valve is connected to the first inlet pipe and the first inlet branch pipe through flanges.

6. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 1, characterized in that: A test pipeline is provided between the fire fresh water storage tank and the fire water main ring network, and both ends of the test pipeline are connected to the fire fresh water storage tank and the fire water main ring network respectively.

7. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 6, characterized in that: The test pipeline includes a fire test pump, a second inlet pipe is connected to the suction end of the fire test pump, the end of the second inlet pipe away from the fire test pump is connected to the fire fresh water storage tank, a third outlet pipe is connected to the discharge end of the fire test pump, and the end of the third outlet pipe away from the fire test pump is connected to the fire water main ring network.

8. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 7, characterized in that: The test line is connected to the spare line.

9. The fresh water pressure-stabilizing water supply system of the seawater fire fighting system according to claim 4 or 8, characterized in that: The second inlet pipe is connected to a second inlet branch pipe, and one end of the second inlet branch pipe away from the second inlet pipe is connected to the first inlet branch pipe.

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