Pressure stabilizing device of fire fighting water system of offshore unmanned platform

Abstract

The utility model discloses a pressure stabilizing device of a fire fighting water system of an offshore unmanned platform, the pressure stabilizing device of the fire fighting water system of the offshore unmanned platform comprises a main pressure stabilizing pump and a standby pressure stabilizing pump, the main pressure stabilizing pump and the standby pressure stabilizing pump are both connected to a main pipe network, the main pipe network is provided with a pressure transmitter, and the pressure transmitter is connected with a control box. The control box is connected with the main stabilized pressure pump and the standby stabilized pressure pump so that the main stabilized pressure pump and the standby stabilized pressure pump can be switched for use, a main pipe network isolation valve is arranged on the main pipe network, and the main pipe network isolation valve needs to be closed when the main stabilized pressure pump and the standby stabilized pressure pump are switched for use. According to the pressure stabilizing device of the fire fighting water system of the offshore unmanned platform, the pressure transmitter is arranged on the main pipe network, the pressure transmitter detects the pressure of fire fighting water in the main pipe network and feeds back the pressure to the control box, the control box selects to open or close the main pressure stabilizing pump and the standby pressure stabilizing pump according to the pressure, automatic operation is achieved, remote control can be achieved, and the pressure stabilizing device is convenient to use. The system has the characteristics of high automation level and conformity with an unmanned platform.

Description

Technical Field

[0001] The utility model belongs to the field of marine petroleum engineering, in particular to a pressure stabilizing device for a fire water system of an unmanned offshore platform. Background Art

[0002] At present, the fire water systems of unmanned offshore platforms all use dry pipe networks. The main reason is that the production facilities of unmanned platforms are simple and there is no supporting system to provide a reliable and stable water source for the fire water system to stabilize the pressure.

[0003] Dry firefighting pipe networks can cause two problems: First, the fire water system's response time is prolonged. After a fire breaks out, the fire pump must first fill the main pipe network before it can spray firefighting water, adding 1-2 minutes to the response time. Second, due to the lack of water pressure in the main pipe network, the fire zone valves (deluge valves) cannot remain closed, resulting in the unmanned platform being unable to spray zoned water, which in turn increases the fire pump's displacement.

[0004] Therefore, it is urgent to design a pressure stabilizing device for the fire water system of an unmanned offshore platform to solve the above-mentioned problem of fire water system pressure stabilization. Utility Model Content

[0005] In order to solve the technical problem that the response time of the fire water system is prolonged as mentioned in the background technology, after a fire occurs, the fire pump needs to fill the main network first before it can spray water for fire fighting. The main network has no water pressure, and the fire zone valve cannot remain closed, resulting in the unmanned platform being unable to perform zone spraying. A pressure stabilizing device for the fire water system of an offshore unmanned platform is provided to solve the problem of pressure stabilization of the fire water system.

[0006] To achieve the above objectives, the specific technical solutions of the pressure stabilizing device of the fire water system of the unmanned offshore platform of the present invention are as follows:

[0007] A pressure stabilizing device for a fire water system of an unmanned offshore platform includes a main pressure stabilizing pump and a backup pressure stabilizing pump. Both the main pressure stabilizing pump and the backup pressure stabilizing pump are connected to a main network. A pressure transmitter is provided on the main network. The pressure transmitter is connected to a control box. The control box is connected to the main pressure stabilizing pump and the backup pressure stabilizing pump to switch between the main pressure stabilizing pump and the backup pressure stabilizing pump. A main network isolation valve is provided on the main network. When the main pressure stabilizing pump and the backup pressure stabilizing pump are switched, the main network isolation valve needs to be closed.

[0008] Furthermore, the main pressure-stabilizing pump and the backup pressure-stabilizing pump are respectively connected to a first pressure-stabilizing pump water suction port and a second pressure-stabilizing pump water suction port to pump out water and eliminate waterproofing.

[0009] Furthermore, the main pressure stabilizing pump and the backup pressure stabilizing pump are both connected to the main network through pipelines.

[0010] Furthermore, a first main network isolation valve is provided on the main network between the main pressure stabilizing pump and the backup pressure stabilizing pump. The first main network isolation valve is closed to inspect and repair the main pressure stabilizing pump or the backup pressure stabilizing pump.

[0011] Furthermore, a plurality of second main network isolation valves are provided on the main network, and the second main network isolation valves are closed to inspect the main network.

[0012] Furthermore, the pressure transmitter is connected to the main network. When the pressure in the main network is lower than the set point low value, the pressure transmitter should send a signal and the control box will start the main pressure regulating pump.

[0013] Furthermore, if the pressure in the main network fails to reach the set low value within 15 seconds after the main pressure stabilizing pump is started, the pressure transmitter sends a signal and the control box starts the backup pressure stabilizing pump.

[0014] Furthermore, the first pressure-stabilizing pump water inlet and the second pressure-stabilizing pump water inlet are both located below sea level.

[0015] Furthermore, a first check valve is provided on the pipeline connecting the main pressure stabilizing pump and the main network.

[0016] Furthermore, a second check valve is provided on the pipeline connecting the standby pressure-stabilizing pump and the main network.

[0017] The pressure stabilizing device of the fire water system of the unmanned offshore platform of the present invention has the following advantages:

[0018] By installing a pressure transmitter on the main network, the pressure transmitter detects the fire water pressure in the main network and feeds it back to the control box. The control box then switches the main and backup pressure-stabilizing pumps on or off according to the pressure, achieving automatic operation. It can also be remotely controlled, achieving a high level of automation and meeting the characteristics of unmanned platforms. This application has few components and mature technology. Two pressure-stabilizing pumps, one main and one backup, are installed, achieving high stability and reliability at a low cost. The components and equipment are commonly found on offshore platforms, making them easy to purchase and adaptable to the corrosive environment at sea, thereby improving the inherent safety level of unmanned platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a pressure stabilizing device for a fire water system of an unmanned offshore platform according to the present invention.

[0020] Description of the marks in the figure:

[0021] 1. Main pressure-stabilizing pump; 2. Backup pressure-stabilizing pump; 3. Main network; 4. Pressure transmitter; 5. Control box; 6. Isolation valve of the first main network; 7. Isolation valve of the second main network; 8. Water intake of the first pressure-stabilizing pump; 9. Water intake of the second pressure-stabilizing pump; 10. First check valve; 11. Second check valve; 12. Sea level. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] 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 from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0024] Please refer to the attached Figure 1 The utility model describes a pressure stabilizing device for a fire water system of an unmanned offshore platform.

[0025] like Figure 1 As shown, the pressure stabilizing device of the fire water system of the unmanned offshore platform in the present invention includes a main pressure stabilizing pump 1 and a backup pressure stabilizing pump 2. The main pressure stabilizing pump 1 and the backup pressure stabilizing pump 2 are both connected to the main network 3. The main network 3 is provided with a pressure transmitter 4. The pressure transmitter 4 is connected to the control box 5. The control box 5 is connected to the main pressure stabilizing pump 1 and the backup pressure stabilizing pump 2 to switch between the main pressure stabilizing pump 1 and the backup pressure stabilizing pump 2. The main network 3 is provided with a main network isolation valve. The main network isolation valve needs to be closed when switching between the main pressure stabilizing pump 1 and the backup pressure stabilizing pump 2.

[0026] By installing a pressure transmitter 4 on the main network 3, the pressure transmitter 4 detects the fire water pressure in the main network 3 and feeds it back to the control box 5. The control box 5 then switches on or off the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2 according to the pressure, achieving automatic operation. It can also be remotely controlled, with a high level of automation that meets the characteristics of an unmanned platform. This application has few components and mature technology. Two pressure-stabilizing pumps, one main and one backup, are installed, offering high stability and reliability at low cost. The components and equipment are commonly found on offshore platforms, making them easy to purchase and adaptable to the corrosive environment at sea, thereby improving the inherent safety level of the unmanned platform.

[0027] Further, if Figure 1As shown, the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2 are respectively connected to the first pressure-stabilizing pump water suction port 8 and the second pressure-stabilizing pump water suction port 9 to pump out water; the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2 are both connected to the main network 3 through pipelines; the main network 3 between the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2 is provided with a first main network isolation valve 6, which is closed to repair the main pressure-stabilizing pump 1 or the backup pressure-stabilizing pump 2.

[0028] In this embodiment, preferably, the main pressure-stabilizing pump 1 is connected to the first pressure-stabilizing pump water inlet 8 through a pipeline, and the standby pressure-stabilizing pump 2 is connected to the second pressure-stabilizing pump water inlet 9 through a pipeline. Seawater is extracted through the first pressure-stabilizing pump water inlet 8 and the second pressure-stabilizing pump water inlet 9. The materials of the main pressure-stabilizing pump 1 and the standby pressure-stabilizing pump 2 are both resistant to seawater corrosion.

[0029] It is suitable for the environment of Class 1, Class 1 hazardous area, and its sealing grade is at least IP56. The control box 5 has remote and local control interfaces, which can expand the interface of the wireless receiving device to realize the local and remote control functions of the pressure regulating pump.

[0030] The main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2 are respectively connected to the main network 3 through pipelines. A first main network isolation valve 6 is provided on the main network 3 between the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2. When the main pressure-stabilizing pump 1 or the backup pressure-stabilizing pump 2 needs to be repaired, the first main network isolation valve 6 on the main network 3 is closed, and then the main pressure-stabilizing pump 1 or the backup pressure-stabilizing pump 2 is repaired.

[0031] Further, if Figure 1 As shown, the main network 3 is further provided with a plurality of second main network isolation valves 7. The second main network isolation valves 7 are closed to inspect the main network 3. A pressure transmitter 4 is connected to the main network 3. When the pressure in the main network 3 is lower than the set point low value, the pressure transmitter 4 should send a signal to the control box 5 to start the main pressure-stabilizing pump 1. If the pressure in the main network 3 does not reach the set point low value within 15 seconds after the main pressure-stabilizing pump 1 is started, the pressure transmitter 4 sends a signal to the control box 5 to start the backup pressure-stabilizing pump 2.

[0032] In this embodiment, a plurality of second main network isolation valves 7 are provided at intervals on the main network 3. Preferably, when the main network 3 pipeline needs to be repaired or inspected, the second main network isolation valves 7 of the main network 3 are closed accordingly, and the main network 3 is then inspected in sections.

[0033] A pressure transmitter 4 is provided on the main network 3. Preferably, the pressure transmitter 4 monitors the fire water pressure of the main network 3. When the fire water pressure of the main network 3 is lower than the set point low value, the pressure transmitter 4 should send a signal and the control box 5 starts the main pressure stabilizing pump 1.

[0034] Pressure transmitter 4 can adjust its setpoint according to project requirements. Typically, there are two setpoints: a high of 7 barg and a low of 6 barg. The accuracy of pressure transmitter 4 should be no less than 0.25%. When the pressure within the fire water main network 3 falls below the low setpoint, pressure transmitter 4 should signal the start of the main pressure-stabilizing pump 1. If the pressure within the main network 3 fails to reach the low setpoint of 7 barg within 15 seconds of starting the main pressure-stabilizing pump 1, the transmitter should signal the start of the backup pressure-stabilizing pump 2. When the pressure within the network reaches the high setpoint, the pressure-stabilizing pump 2 will stop.

[0035] Further, if Figure 1 As shown, the first pressure-stabilizing pump water inlet 8 and the second pressure-stabilizing pump water inlet 9 are both located below sea level 12; a first check valve 10 is provided on the pipeline connecting the main pressure-stabilizing pump 1 and the main network 3; a second check valve 11 is provided on the pipeline connecting the standby pressure-stabilizing pump 2 and the main network 3.

[0036] In this embodiment, preferably, the first pressure-stabilizing pump water intake 8 and the second pressure-stabilizing pump water intake 9 are always located below sea level 12 to ensure the water demand of the main pressure-stabilizing pump 1 and the backup pressure-stabilizing pump 2; a first check valve 10 is provided on the pipeline connecting the main pressure-stabilizing pump 1 and the main network 3, and a second check valve 11 is provided on the pipeline connecting the backup pressure-stabilizing pump 2 and the main network 3, thereby preventing the fire water from flowing back to the main pressure-stabilizing pump 1 or the backup pressure-stabilizing pump 2.

[0037] The utility model is a pressure stabilizing device for the fire water system of an unmanned offshore platform. The pressure transmitter 4 is installed on the main network 3. The pressure transmitter 4 detects the fire water pressure in the main network 3 and feeds it back to the control box 5. The control box 5 selects to open or close the main pressure stabilizing pump 1 and the backup pressure stabilizing pump 2 according to the pressure, achieving automatic operation. It can also be remotely controlled, with a high level of automation, which conforms to the characteristics of an unmanned platform. This application has few components and mature technology. Two pressure stabilizing pumps, one main and one backup, are installed, with high stability and reliability, and low cost. The components and equipment are all common equipment and components on offshore platforms, making them easy to purchase and adaptable to the corrosive environment at sea, thereby improving the inherent safety level of the unmanned platform.

[0038] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure stabilizing device for a fire water system of an unmanned offshore platform, characterized in that: It includes a main pressure-stabilizing pump and a backup pressure-stabilizing pump. Both the main pressure-stabilizing pump and the backup pressure-stabilizing pump are connected to the main network. A pressure transmitter is provided on the main network. The pressure transmitter is connected to the control box. The control box is connected to the main pressure-stabilizing pump and the backup pressure-stabilizing pump to switch between the main pressure-stabilizing pump and the backup pressure-stabilizing pump. A main network isolation valve is provided on the main network. The main network isolation valve needs to be closed when switching between the main pressure-stabilizing pump and the backup pressure-stabilizing pump.

2. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 1, characterized in that: The main pressure-stabilizing pump and the standby pressure-stabilizing pump are respectively connected to the first pressure-stabilizing pump water suction port and the second pressure-stabilizing pump water suction port to pump out water.

3. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 2, characterized in that: The main pressure stabilizing pump and the backup pressure stabilizing pump are both connected to the main network through pipelines.

4. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 3 is characterized in that: A first main network isolation valve is provided on the main network between the main pressure stabilizing pump and the standby pressure stabilizing pump. The first main network isolation valve is closed to inspect and repair the main pressure stabilizing pump or the standby pressure stabilizing pump.

5. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 4, characterized in that: The main network is also provided with a plurality of second main network isolation valves, which are closed to inspect the main network.

6. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 1, characterized in that: The pressure transmitter is connected to the main network. When the pressure in the main network is lower than the set point low value, the pressure transmitter should send a signal and the control box will start the main pressure regulating pump.

7. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 6, characterized in that: If the pressure in the main network fails to reach the set low value within 15 seconds after the main pressure-stabilizing pump is started, the pressure transmitter sends a signal and the control box starts the backup pressure-stabilizing pump.

8. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 2, characterized in that: The first pressure-stabilizing pump water inlet and the second pressure-stabilizing pump water inlet are both located below sea level.

9. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 6, characterized in that: A first check valve is provided on the pipeline connecting the main pressure-stabilizing pump and the main network.

10. The pressure stabilizing device for the fire water system of an unmanned offshore platform according to claim 7, characterized in that: A second check valve is provided on the pipeline connecting the standby pressure-stabilizing pump and the main network.

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