Automatic foam spraying system suitable for offshore oil platform

Abstract

The utility model discloses an automatic foam spraying system suitable for an offshore oil platform. The automatic foam spraying system comprises a deluge valve, a foam proportioning mixer and a spraying unit which are sequentially communicated through a fire-fighting water main pipeline, the deluge valve is connected with the instrument control system; the foam proportioning mixer is communicated with the foam tank; the instrument control system comprises a self-operated regulating valve and an electromagnetic valve which are sequentially communicated with an instrument air source through an instrument air pipeline, and the electromagnetic valve is communicated with the instrument air source of the deluge valve; the spraying unit is arranged at the terminal end of the fire-fighting water main pipeline, and the starting end of the fire-fighting water main pipeline is connected into the fire-fighting water looped network; the spraying unit comprises a plurality of branch pipelines communicated with the fire-fighting water main pipeline, and each branch pipeline is provided with at least one spraying head. The deluge valve and the foam system are combined, automatic foam spraying is achieved, fire disasters of crude oil processing facilities of the offshore platform can be effectively controlled, fire spreading is prevented, and personal / economic losses caused by fire accidents are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of fire safety equipment for offshore oil platforms, and in particular relates to an automatic foam spraying system suitable for offshore oil platforms. Background Art

[0002] At present, offshore platforms mainly protect their equipment by configuring automatic fire water sprinklers, fire water / foam hose stations and portable fire extinguishers. The flash point of crude oil is lower than 60°C, and fire water sprinklers cannot completely extinguish fires. Their main function is to cool equipment. In addition, the density of seawater is greater than that of crude oil. For fires caused by the burning of crude oil, seawater cannot isolate the crude oil from the air. Instead, it will carry the crude oil around, causing the fire area to further expand and spread. Fire water / foam hose stations can only be operated manually and can only be used to control small fires in the early stages. In addition, the volume of foam liquid filled in the hose station is very small, and the spraying time is short. After the fire expands, personnel cannot get close to operate the foam hose station. Utility Model Content

[0003] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide an automatic foam spraying system suitable for offshore oil platforms.

[0004] The utility model is realized by the following technical solutions:

[0005] An automatic foam spray system suitable for offshore oil platforms comprises a deluge valve, a foam proportioning mixer and a spray unit which are sequentially connected through a fire water main line; the deluge valve is electrically connected to an instrumentation and control system; the foam proportioning mixer is interconnected with a foam tank; the instrumentation and control system comprises a self-operated regulating valve and a solenoid valve which are sequentially connected to an instrument air source through an instrument air line, and the solenoid valve is connected to the instrument air source of the deluge valve through the instrument air line; the spray unit is arranged at the terminal of the fire water main line, and the starting end of the fire water main line is connected to a fire water ring network; the spray unit comprises a plurality of branch lines which are connected to the fire water main line, and at least one nozzle is arranged on each branch line.

[0006] In the above technical solution, isolation valves and pressure gauges are arranged upstream and downstream of the foam proportioning mixer and upstream of the deluge valve.

[0007] In the above technical solution, the isolation valve and pressure gauge upstream of the foam proportioner are arranged between the deluge valve and the foam proportioner, and the isolation valve and pressure gauge downstream of the foam proportioner are arranged between the foam proportioner and the spray unit.

[0008] In the above technical solution, a check valve is arranged between the self-operated regulating valve and the solenoid valve.

[0009] In the above technical solution, an air source isolation valve and an air source pressure gauge are arranged between the self-operated regulating valve and the instrument air source.

[0010] In the above technical solution, a solenoid valve pressure gauge is arranged between the solenoid valve and the deluge valve.

[0011] In the above technical solution, the fire water main pipeline and branch pipelines are both seawater corrosion-resistant pipelines.

[0012] In the above technical scheme, the foam proportioning mixer includes a tubular shell and a water spray chamber and a diffusion tube arranged in the shell and interconnected with each other; the water spray chamber is a hollow cylindrical structure, and its bottom end is fixed to the inner wall of the shell; the end face of the water inlet side of the water spray chamber forms a conical surface extending to the water outlet side, and the lowest point of the conical surface forms a water inlet, and a nozzle is arranged at the water inlet; the end face of the water outlet side of the water spray chamber forms a conical surface extending to the water outlet side, and the lowest point of the conical surface forms a water outlet; the diffusion tube is a conical tube that gradually expands in diameter from the water inlet side to the water outlet side; the large diameter end of the diffusion tube is fixed to the inner wall of the shell; the water spray chamber is connected to the foam tank through the foam liquid outlet pipe, and the water spray chamber end port of the foam liquid outlet pipe is provided with an orifice plate; the space enclosed by the water spray chamber, the diffusion tube and the shell is connected to the foam tank through the pressure water inlet pipe.

[0013] In the above technical solution, the water spray chamber is arranged on the water inlet side of the shell.

[0014] In the above technical solution, the shell at the upper end of the shell water spray chamber expands outwards.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides an automatic foam spraying system suitable for offshore oil platforms, which combines a deluge valve with a foam system to realize automatic foam spraying, can effectively extinguish fires in crude oil processing facilities on offshore platforms, prevent the fire from spreading, and reduce personal / economic losses caused by fire accidents in offshore facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the principle of the instrumentation and control system in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the proportional mixer in the utility model.

[0020] in:

[0021] 1. Deluge valve; 2. Foam tank; 3. Foam proportioning mixer; 4. Instrumentation and control system; 5. Fire water main line; 6. Nozzle; 7. Self-operated regulating valve; 8. Solenoid valve; 9. Pressure gauge; 10. Isolation valve; 11. Check valve; 12. Instrument gas pipeline; 13. Solenoid valve pressure gauge; 14. Gas source isolation valve; 15. Gas source pressure gauge; 16. Shell; 17. Nozzle; 18. Diffuser; 19. Mixing chamber; 20. Foam liquid outlet pipe; 21. Orifice plate; 22. Pressure water inlet pipe; 23. Water spray chamber.

[0022] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0024] like Figure 1 As shown, an automatic foam spraying system for an offshore oil platform comprises a deluge valve 1, a foam proportioning mixer 3 and a spraying unit which are sequentially connected through a fire water main line 5;

[0025] The deluge valve 1 is connected to the instrumentation and control system 4;

[0026] The foam proportioning mixer 3 is communicated with the foam tank 2;

[0027] The isolation valve 10 and the pressure gauge 9 are arranged upstream and downstream of the foam proportioning mixer 3 and upstream of the shower valve 1; and the isolation valve 10 and the pressure gauge 9 upstream of the foam proportioning mixer 3 are arranged between the shower valve 1 and the foam proportioning mixer 3; the isolation valve 10 and the pressure gauge 9 downstream of the foam proportioning mixer 3 are arranged between the foam proportioning mixer 3 and the spray unit;

[0028] like Figure 3 As shown, the foam proportioning mixer 3 includes a tubular shell 16 and a water spraying chamber 23 and a diffusion pipe 18 which are arranged in the shell 16 and are interconnected; the water spraying chamber 23 is arranged on the water inlet side of the shell 16;

[0029] The two ends of the shell 16 are provided with pipe fittings for connecting with the fire water main line 5; the shell 16 at the upper end of the water spray chamber 23 is expanded outward;

[0030] The water spray chamber 23 is a hollow cylindrical structure, and its bottom end is fixed to the inner wall of the housing 16; the end face of the water inlet side of the water spray chamber 23 forms a conical surface extending toward the water outlet side, and the lowest point of the conical surface forms a water inlet, and the water inlet is provided with a nozzle 17; the end face of the water outlet side of the water spray chamber 23 forms a conical surface extending toward the water outlet side, and the lowest point of the conical surface forms a water outlet;

[0031] The diffuser 18 is a tapered tube that gradually expands in diameter from the water inlet side to the water outlet side; the large diameter end of the diffuser 18 is fixed to the inner wall of the shell 16; the shell 16 on the water outlet side of the diffuser 18 forms a mixing chamber 19;

[0032] The water spray chamber 23 is connected to the foam tank 2 through the foam liquid outlet pipe 20, and an orifice plate 21 is provided at the water spray chamber end of the foam liquid outlet pipe 20;

[0033] The space enclosed by the water spray chamber 23, the diffusion pipe 18 and the shell 16 is connected to the foam tank 2 through the pressure water inlet pipe 22;

[0034] The pressurized fire water enters the inlet of the foam proportioning mixer 3 through the fire water main line 5, and the water is sprayed toward the diffuser 18 through the nozzle 17, forming a low-pressure area between the nozzle 17 outlet and the diffuser 18. A part of the pressurized water flowing through the pressure water pipe enters the foam liquid storage tank through the pressure water inlet pipe 22, and the foam liquid is pressed out from the foam liquid outlet pipe 20, passes through the orifice plate 21 into the low-pressure area, and is mixed with the pressurized water flow in the mixing chamber 19 to form a foam mixed liquid output;

[0035] like Figure 2 As shown, the instrumentation control system 4 includes a self-operated regulating valve 7 and a solenoid valve 8 which are sequentially connected to the instrument gas source through an instrument gas pipeline 12. The solenoid valve 8 is connected to the instrument gas source of the deluge valve 1 through the instrument gas pipeline 12. The instrumentation control system 4 receives the fire condition electrical signal and controls the on / off of the instrument gas source of the deluge valve 1 by powering on / off the solenoid valve 8.

[0036] The solenoid valve 8 is connected to the fire and gas control system on the platform to receive the fire signal from the fire and gas control system; the fire and gas control system does not belong to this system;

[0037] A check valve 11 is provided between the self-operated regulating valve 7 and the solenoid valve 8;

[0038] An air source isolation valve 14 and an air source pressure gauge 15 are provided between the self-operated regulating valve 7 and the instrument air source;

[0039] A solenoid valve pressure gauge 13 is provided between the solenoid valve 8 and the deluge valve 1;

[0040] The spray unit is arranged at the terminal of the fire water main line 5, and the starting end of the fire water main line 5 is connected to the fire water ring network; the spray unit includes a plurality of branch lines connected to the fire water main line 5, and each branch line is provided with at least one sprinkler 6;

[0041] The fire water main line 5 and the branch line are both seawater corrosion-resistant pipelines. In this embodiment, the fire water main line 5 and the branch line are copper-nickel pipelines;

[0042] The foam tank 2 stores a certain proportion of foam mixed liquid. In this embodiment, the foam tank 2 contains AFFF foam fire extinguishing agent with a mixing ratio of 3%.

[0043] The foam tank 2 is designed as a pressure vessel; the number and distribution positions of the spray heads 6 in the spray unit are designed according to the spraying requirements of the protected object.

[0044] The use of the utility model:

[0045] When a fire is confirmed in the protection area, the system is activated, the deluge valve 1 is opened, and the fire water is mixed with the foam liquid in the foam tank 2 in proportion in the foam proportioning mixer 3, and then automatically sprays the fire through the sprinkler 6 to extinguish the fire.

[0046] The utility model adds a foam liquid supply device on the basis of the original wet automatic water sprinkler fire extinguishing system, realizes a rapid response to petroleum fire, is highly efficient and energy-saving, has high reliability and strong pertinence; the use of environmentally friendly foam mixed liquid has little impact on the environment, and will not produce toxic residues or cause serious pollution to the atmosphere; the residues left by the foam are easy to clean up and will not cause excessive damage to the fire-extinguished area; except for the sprinkler head, other facilities are designed as a skid, saving manufacturing cost and installation cost.

[0047] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0049] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. An automatic foam spraying system suitable for offshore oil platforms, characterized by: The invention comprises a deluge valve (1), a foam proportioning mixer (3) and a spray unit which are sequentially connected through a fire water main line (5); the deluge valve (1) is connected to an instrument control system (4); the foam proportioning mixer (3) and a foam tank (2) are mutually connected; the instrument control system (4) comprises a self-operated regulating valve (7) and a solenoid valve (8) which are sequentially connected to an instrument gas source through an instrument gas pipeline (12); the solenoid valve (8) is connected to the instrument gas source of the deluge valve (1) through the instrument gas pipeline (12); the spray unit is arranged at the terminal of the fire water main line (5), and the starting end of the fire water main line (5) is connected to a fire water ring network; the spray unit comprises a plurality of branch lines which are connected to the fire water main line (5), and each branch line is provided with at least one spray head (6).

2. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: An isolation valve (10) and a pressure gauge (9) are arranged upstream and downstream of the foam proportioning mixer (3) and upstream of the deluge valve (1).

3. The automatic foam spraying system suitable for offshore oil platforms according to claim 2 is characterized in that: The isolation valve (10) and the pressure gauge (9) upstream of the foam proportioning mixer (3) are arranged between the deluge valve (1) and the foam proportioning mixer (3), and the isolation valve (10) and the pressure gauge (9) downstream of the foam proportioning mixer (3) are arranged between the foam proportioning mixer (3) and the spray unit.

4. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: A check valve (11) is arranged between the self-operated regulating valve (7) and the solenoid valve (8).

5. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: An air source isolation valve (14) and an air source pressure gauge (15) are provided between the self-operated regulating valve (7) and the instrument air source.

6. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: A solenoid valve pressure gauge (13) is arranged between the solenoid valve (8) and the deluge valve (1).

7. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: The fire water main pipeline (5) and branch pipelines are both seawater corrosion-resistant pipelines.

8. The automatic foam spraying system suitable for offshore oil platforms according to claim 1 is characterized in that: The foam proportioning mixer (3) comprises a tubular shell (16), and a water spraying chamber (23) and a diffusion pipe (18) which are arranged in the shell (16) and are interconnected. The water spray chamber (23) is a hollow cylindrical structure, the bottom end of which is fixed to the inner wall of the housing (16); the end surface of the water inlet side of the water spray chamber (23) forms a conical surface extending toward the water outlet side, and the lowest point of the conical surface forms a water inlet, and the water inlet is provided with a nozzle (17); the end surface of the water outlet side of the water spray chamber (23) forms a conical surface extending toward the water outlet side, and the lowest point of the conical surface forms a water outlet; The diffusion tube (18) is a tapered tube whose diameter gradually expands from the water inlet side to the water outlet side; the large-diameter end of the diffusion tube (18) is fixed to the inner wall of the shell (16); The water spray chamber (23) is connected to the foam tank (2) through the foam liquid outlet pipe (20), and an orifice plate (21) is provided at the water spray chamber end of the foam liquid outlet pipe (20); The space enclosed between the water spray chamber (23), the diffusion pipe (18) and the shell (16) is connected to the foam tank (2) through the pressure water inlet pipe (22).

9. The automatic foam spraying system suitable for offshore oil platforms according to claim 8 is characterized in that: The water spray chamber (23) is arranged on the water inlet side of the housing (16).

10. The automatic foam spraying system suitable for offshore oil platforms according to claim 8 is characterized in that: The shell (16) at the upper end of the water spray chamber (23) of the shell (16) expands outwards.

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