CN113160515B - Sonar-based oil storage tank fire boiling and splash warning technology - Google Patents

Abstract

The invention discloses a sonar-based oil storage tank fire boiling and splashing warning device, which includes two arrangements of a fixed probe at the upper part of the oil layer and a fixed probe at the lower part of the oil layer. Device, fixed pillar, fixed rope, fire foam floating board, float. The sonar-based oil storage tank fire boiling and splashing early warning device provided by the present invention can adopt two different probe arrangements according to the actual situation, and can be used after the oil tank fire occurs and after the conventional fire protection measures are taken. When the fire cannot be effectively extinguished, the sonar probe is used to detect the information of bubbles in the oil to determine whether boiling over and splashing will occur, and before the boiling and splashing occurs, the information is transmitted to the alarm device, which triggers an alarm to remind the staff to evacuate, reducing the casualties.

Description

Sonar-based oil storage tank fire boiling and splash warning technology

technical field

The invention relates to the field of oil storage tank fire warning, in particular to an oil storage tank fire boiling overflow and splash warning device.

Background technique

Crude oil is unprocessed oil extracted from the ground. Crude oil is a mixture of hydrocarbons, the main components of which are hydrocarbons. Crude oil has a high viscosity and contains a certain amount of water to varying degrees. Crude oil contains free water and emulsified water. In a crude oil fire, heat waves will heat and vaporize the water in the crude oil and turn it into water vapor. The steam bubbles are surrounded by the oil film to form a large number of oil bubbles, which will cause the volume to expand violently and exceed the storage tank. When it can hold it, it will overflow outside the pot like a gruel overflowing a pot, causing a boil over. As the combustion continues, the temperature of the heat wave gradually increases and moves downward. When the thermal front encounters the water layer (or a large amount of water), when a large amount of water is rapidly vaporized into water vapor, the volume expands by 1700 times, and its The vapor pressure also increases rapidly. When the water vapor rapidly rushes out of the liquid surface with great pressure, the crude oil on the upper part of the water cushion is thrown into the sky, forming a splash and bringing the flaming oil to the sky, forming a huge fire column. This phenomenon is called splashing. Boiling spills and splashes are extremely harmful in crude oil fires. Boiling spills can cause crude oil to spill over a distance of tens of meters. When large oil tanks store oil for a long time, the overflow area can reach several thousand square meters, thus causing the fire to spread over a large area. . When splashing, the flame of crude oil suddenly flies into the air, the fire column can be as high as 70-80m, and the jet distance of the fire column downwind can reach about 120m. When the flame rolls down, it spreads to the surrounding, easily spreads to the adjacent oil tank, expands the disaster situation, and may cause firefighters to be surrounded by flames suddenly, causing casualties.

In the prior art, the detection of oil storage tank fires usually uses infrared flame detectors and linear beam detection methods. Although the fire can be detected as early as possible, it cannot well predict whether and when the boiling over and splashing of the fire will occur, threatening fire fighting. Personal safety of firefighters.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a sonar-based oil storage tank fire warning device for boiling over and splashing, utilizing the feature that a large number of bubbles will be generated when a boiling over fire occurs, the storage tank can be detected by a sonar probe The water bubbles in the oil are heated and evaporated; the sonar probe signal is received through the display device, and the bubble information is displayed; the alarm device is used to give an alarm in the early stage of the fire, so that the surrounding staff can respond and evacuate in time.

A sonar-based oil storage tank fire boiling and splash warning device includes two arrangements of a fixed probe on the upper part of the oil layer and a fixed probe on the lower part of the oil layer, and is characterized in that it includes a sonar probe, a cooling device, a display device, an alarm device, Fixed pillars, fixed ropes, fire-fighting foam boards, floats.

The sonar probe is mainly fixed on the pillar by a fixed pillar, and the outer side is surrounded by a cooling device. Based on the principle of sound wave transmission, when a fire occurs in an oil storage tank, the bubbles in the oil storage tank that are heated and evaporated can be detected and converted into The signal is transmitted to the display device.

The cooling device is fixed by a fixed support, surrounded by the outside of the sonar probe, and cools the oil temperature around the sonar probe when a fire occurs in the oil storage tank.

The display device is mainly composed of a display main body and a control button. The display main body is located on the upper part of the display device, which is used to receive the feedback signal of the sonar probe and display bubble information; the control button is located at the lower part of the display device and is used to control the Display device switch and oil display position.

After the alarm device is connected to the display device, it is used for receiving signals and giving an alarm to remind personnel to evacuate.

The fixed support is fixed under the fire-fighting foam floating plate, and is mainly used for fixing the sonar probe.

The fire-fighting foam floating board is used to install fixed pillars and rises as the oil level rises.

The float is used to be fixed on the sonar probe and rises with the rise of the water surface at the bottom of the oil storage tank.

The length of the fixed cable is 30-50 cm, and the outer side of the cable is reinforced with heat insulation protection for fixing the float.

The beneficial effects of the present invention are as follows:

(1) A kind of sonar-based oil storage tank fire boiling and splashing warning device provided by the present invention can detect by sonar probe when the oil tank fire occurs, when the fire still cannot be effectively extinguished after conventional fire-fighting measures are taken The number and rising rate of bubbles in the oil can be used to judge whether boiling over and splashing will occur, and the information will be transmitted to the alarm device before the boiling and splashing occurs, which will trigger an alarm to remind the staff to evacuate and reduce casualties.

(2) The present invention is provided with a cooling device, which can cool the surrounding sonar probe through its own condensate circulation to ensure its normal operation.

(3) The display device provided in the present invention can clearly indicate the number of bubbles and the rising rate.

Description of drawings

Fig. 1 is the overall schematic diagram of the device of the present invention;

Fig. 2 is the schematic diagram of the method of arranging probes in the upper part of the oil layer according to the present invention;

FIG. 3 is a schematic diagram of the method of arranging probes in the lower part of the oil layer according to the present invention.

Among them, 11. Sonar probe, 12. Cooling device, 13. Display device, 131. Display main body, 132. Control button, 14. Alarm device;

21. Oil storage tank, 22. Firefighting foam floating board, 23. Fixed pillar;

31. Float, 32. Fixed cable.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The invention discloses a sonar-based oil storage tank fire boiling and splashing early warning device, comprising a sonar probe 11, a cooling device 12, a display device 13, an alarm device 14, a fixed pillar 23, a fixed rope 32, and a fire-fighting foam floating plate 22. Float 31.

Referring to FIG. 1, the sonar probe 11 in the present invention is mainly fixed below the oil surface by the fixed support 23 or fixed at the bottom of the oil storage tank by the fixed cable 32, and the outer side is surrounded by the cooling device 12. Based on the principle of sound wave transmission, in the oil When a fire occurs in the oil storage tank, the air bubbles in the oil storage tank 21 which are heated and evaporated can be detected. By using the sonar method to receive the information of the bubbles generated in the liquid in the oil storage tank 21, it is possible to avoid the problem that the wiring is complicated and the wiring is easily damaged in the high temperature environment in the event of a fire, and the information cannot be effectively transmitted in the information transmission by the wired method;

Referring to FIG. 1, the cooling device 12 in the present invention is surrounded by the outside of the sonar probe. When a fire occurs in the oil storage tank 21, the oil temperature around the sonar probe 11 is cooled, so as to avoid the sonar caused by higher oil temperature when a fire occurs. The problem of the failure of the probe 11; the cooling device 12 has a temperature sensor, which can monitor the oil temperature in real time, and start to work for cooling when the oil temperature reaches the preset value;

1, the display device 13 in the present invention is mainly composed of a display body 131 and a control button 132. The display body 131 is located on the upper part of the display device 13, and is used for receiving the feedback signal of the sonar probe 11 to display the rise of the bubbles Speed and quantity; the control button 132 is located at the lower part of the display device 13 and is used to control the switch of the display device and the display area in the oil storage tank 21 . After receiving the information from the sonar probe 11, the display device 13 reads the information of the bubbles generated by the liquid in the oil storage tank 21, and transmits the information to the alarm before meeting the critical conditions for causing a boiling oversplash fire. system 14;

Referring to FIG. 1, after the alarm device 14 of the present invention is connected to the display device 13, it is used to receive signals and give an alarm to remind personnel to evacuate;

Referring to FIG. 2 , the fixed pillar 23 of the present invention is fixed under the fire-fighting foam floating plate 22, and is used to fix the sonar probe 11 when the probe is arranged on the upper part of the oil layer;

Referring to FIG. 2, the fire-fighting foam floating plate 22 of the present invention floats above the oil level in the oil storage tank 21, and rises as the oil level rises, and a fixed support 23 is fixed below the fire-fighting foam floating plate 22;

Referring to FIG. 3, the float 31 of the present invention is fixed above the sonar probe 11, and rises with the rise of the water surface at the bottom of the oil storage tank;

Referring to FIG. 3 , the fixed cable 32 of the present invention is used to fix the sonar probe 11 when the probe is arranged under the oil layer.

Specifically, an oil storage tank under fire conditions is taken as an example to explain a sonar-based oil storage tank fire boiling and splash warning device provided by the present invention. Since crude oil contains water and its relative density is less than that of water, the water in crude oil will gradually evaporate and accumulate at the bottom of crude oil storage tanks. Once a fire occurs, the temperature of crude oil will continue to rise. When the temperature reaches the ignition point of crude oil, The crude oil starts to burn and generates heat waves, which gradually move to the bottom of the crude oil tank. Since the temperature of the heat wave is much higher than the boiling point of water, the heat wave will vaporize the water accumulated at the bottom of the crude oil storage tank, and a large amount of steam will pass through. Crude oil floats to the liquid surface, and gas bubbles will be formed in the process of upward movement. As the oil temperature increases, the viscosity of the oil will decrease, and the bubbles will be more violently generated. In this way, the volume of crude oil will inevitably expand and overflow outward. At the same time, some crude oil that has not formed foam is also thrown out of the oil storage tank by the steam expansion force below it, causing the crude oil liquid surface to boil violently, resulting in the phenomenon of boiling over. .

In this example, two different probe arrangements can be adopted according to the actual situation. The sonar probe 11 monitors the air bubbles generated inside the oil storage tank 21 in real time when a fire occurs, and transmits the measurement results to the display. Device 13; When there is a fire, the oil temperature inside the oil storage tank 21 will be higher and higher, the viscosity of the oil will decrease, the number of bubbles and the rate of rise will increase, and the sonar probe 11 detects the bubbles The information and the information is transmitted to the display device 13, the display device 13 receives and reads and analyzes the bubble information, when the number of bubbles and the rising rate meet the requirements to cause boiling over and splashing, transmit the information to the alarm device 14 and control The alarm device 14 alarms to remind the personnel to evacuate.

The beneficial effects of the present invention are as follows:

(1) A kind of sonar-based oil storage tank fire boiling and splashing warning device provided by the present invention can detect by sonar probe when the oil tank fire occurs, when the fire still cannot be effectively extinguished after conventional fire-fighting measures are taken The number and rising rate of bubbles in the oil can be used to judge whether boiling over and splashing will occur, and the information will be transmitted to the alarm device before the boiling and splashing occurs, which will trigger an alarm to remind the staff to evacuate and reduce casualties.

(2) The present invention is provided with a cooling device, which can cool the surrounding sonar probe through its own condensate circulation to ensure its normal operation.

(3) The display device provided in the present invention can clearly indicate the number of bubbles and the rising rate.

Claims (6)

1. The utility model provides an oil storage tank conflagration boils and overflows, splash early warning device based on sonar, includes two kinds of arrangement modes of oil reservoir upper portion fixed probe and oil reservoir lower part fixed probe, characterized by: oil reservoir upper portion fixed probe mode includes sonar probe (11), cooling device (12), display device (13), alarm device (14), fire control foam floating plate (22), fixed stay (23), oil reservoir lower part fixed probe mode includes sonar probe (11), cooling device (12), display device (13), alarm device (14), cursory (31), fixed cable (32), this device is based on the sound wave transmission principle, when oil storage tank takes place the conflagration, it produces quantity and rising rate in order to judge whether can take place boiling-over splash to detect bubble production quantity in the oil through sonar probe (11), display device (13) receive sonar probe (11) signal, show bubble information, and with information transmission to alarm device (14) before taking place boiling-over splash, trigger it and send out the police dispatch newspaper.

2. The sonar-based oil storage tank fire boiling overflow and splash early warning device as claimed in claim 1, and the arrangement mode of the fixed probe at the upper part of the oil layer is characterized in that: the sonar probe (11) is fixed on the support by a fixed support (23), the outer side of the sonar probe is surrounded by a cooling device (12), and the fire-fighting foam floating plate (22) is used for installing the fixed support (23) and rises along with the rising of the oil level.

3. The sonar-based oil storage tank fire boiling overflow and splash early warning device as claimed in claim 1, and the arrangement mode of the fixed probe at the lower part of the oil layer is characterized in that: the upper end of the fixed cable (32) is connected with the buoy (31), the lower part of the fixed cable is fixed at the bottom of the storage tank, the outer side of the fixed cable is reinforced with heat insulation protection, and the buoy (31) is fixed above the sonar probe (11) and rises along with the rising of the water surface at the bottom of the oil product storage tank.

4. According to claim 2, oil storage tank conflagration boiling over based on sonar, splash early warning device, the arrangement mode of oil reservoir upper portion fixed probe, characterized by: the cooling device (12) is fixed by a fixed support (23), and when the oil storage tank is in fire, the oil temperature around the sonar probe (11) is cooled.

5. The oil storage tank conflagration boiling over based on claim 1, splash early warning device, characterized by: the display device (13) consists of a display main body (131) and a control key (132), wherein the display main body (131) is positioned at the upper part of the display device (13) and displays bubble information; the control key (132) is positioned at the lower part of the display device (13) and is used for controlling the switch of the display device (13) and the display position in the oil.

6. The sonar-based oil storage tank fire boiling over and splashing early warning device according to claim 1, wherein the device comprises: and the alarm device (14) is connected behind the display device (13) and is used for receiving signals and giving an alarm to remind people of evacuating.

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