CN210145346U - Equipment for fighting fire of oil tank by carbon dioxide - Google Patents
Equipment for fighting fire of oil tank by carbon dioxide Download PDFInfo
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- CN210145346U CN210145346U CN201920445340.3U CN201920445340U CN210145346U CN 210145346 U CN210145346 U CN 210145346U CN 201920445340 U CN201920445340 U CN 201920445340U CN 210145346 U CN210145346 U CN 210145346U
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Abstract
The utility model discloses a device for fighting oil tank fire by carbon dioxide, belonging to the technical field of fire fighting equipment, comprising a storage tank, a main pipeline, branch pipelines and a ring pipe; the storage tank is used for storing carbon dioxide fire extinguishing media, and the carbon dioxide fire extinguishing media comprise gas-phase carbon dioxide and liquid-phase carbon dioxide; the main pipeline is divided into at least one branch pipeline and is used for conveying the carbon dioxide fire extinguishing medium of the storage tank to the branch pipelines; one end of each branch pipeline is communicated with an annular pipe; the ring pipe is fixed on the oil tank floating roof and used for uniformly conveying carbon dioxide to the equal division point direction of the oil tank sealing ring. The problems that a large-scale petroleum storage tank is slow in fire extinguishing speed, pollutes crude oil, is large in pressure loss of fire extinguishing medium conveyed in a long distance, is easy to ice and block, and is small in fire extinguishing agent storage amount are solved.
Description
Technical Field
The utility model belongs to the technical field of fire-fighting equipment, specifically speaking relates to an equipment of oil tank conflagration is suppressed with carbon dioxide.
Background
Petroleum and liquid products thereof are flammable and explosive dangerous goods, and the large-scale petroleum storage tank inevitably brings great challenges of petroleum storage, transportation and fire protection safety. The oil storage tank mostly adopts an outer floating roof structure, and according to the statistics of 81 fire accidents by the American Petroleum Institute (API), about 72.8% of the fire accidents of the storage tank begin from a primary sealing ring and a secondary sealing ring of the outer floating roof structure. Lightning strikes are a major cause of seal ring fires. In the fire, firstly, flash explosion occurs, and at the moment, part of secondary seal and the foam weir plate are damaged to form a three-surface limited combustion space with a local opening; then the sealing ring is completely ignited; eventually the tank collapses.
From the fire protection condition of large-scale oil storage tank, adopt sealing washer foam extinguishing system to protect more, nevertheless along with the maximization of storage tank, traditional foam extinguishing system is more and more difficult to satisfy the demand that actual conflagration was put out a fire and is saved a life-saving. The main reasons are as follows: firstly, the traditional sealing ring foam fire extinguishing system needs too long time from the system starting to the whole liquid level covering, and the fire load is extremely large after the storage tank is large-sized, so that the traditional sealing ring foam fire extinguishing system is difficult to dispose once the fire extinguishing opportunity in the initial stage of the fire is missed; secondly, the foam extinguishing agent has great pollution to crude oil, once misinjection or leakage occurs, the crude oil stored in the foam extinguishing agent can only be wasted, and the economic loss is serious; thirdly, the fire develops rapidly and often accompanies explosion, which may damage the secondary seal, the foam weir plate, the foam generator or the foam fire extinguishing pipe network, causing the complete or partial failure of the fire extinguishing system.
The gas fire extinguishing system has the characteristics of 'early-time-taking and small-extinguishing' and has no pollution to oil products, but except the carbon dioxide fire extinguishing system, other gas fire extinguishing systems can only be used for total flooding protection, once a secondary seal or a rain baffle is damaged due to explosion, the closed environment in a seal ring is damaged, the fire extinguishing effect of all other gas fire extinguishing systems except the carbon dioxide fire extinguishing system is seriously influenced, in other words, only the carbon dioxide fire extinguishing system with local fire extinguishing capacity can solve the reliability problem of explosion resisting capacity.
In view of this, a fire extinguishing system with quick response, high efficiency fire extinguishing, safety, environmental protection and reliable performance is urgently needed for fire protection of large-scale oil storage tanks.
Disclosure of Invention
The utility model aims at the above-mentioned weak point provide an equipment of using carbon dioxide to put out a fire in oil tank, the purpose of solving large-scale oil storage tank speed of putting out a fire slow, pollute crude oil, long distance transport fire extinguishing medium pressure loss big, easy ice stifled, fire extinguishing agent reserves little scheduling problem. In order to achieve the above object, the utility model provides a following technical scheme:
a device for fighting fire disaster of oil tank with carbon dioxide comprises a storage tank 1, a main pipeline 2, branch pipelines 3 and a ring pipe 4; the storage tank 1 is used for storing carbon dioxide fire extinguishing media with pressure in a set interval, and the carbon dioxide fire extinguishing media comprise gas-phase carbon dioxide 11 and liquid-phase carbon dioxide 12; the main pipeline 2 is divided into at least one branch pipeline 3, and the main pipeline 2 is used for conveying carbon dioxide extinguishing medium in the storage tank 1 to the branch pipeline 3; one end of the branch pipeline 3 is communicated with an annular pipe 4; the ring pipe 4 is fixed on the floating roof of the oil tank 5 and used for uniformly conveying carbon dioxide to the equal division point direction of the sealing ring of the oil tank 5. As can be seen from the above structure, the storage tank 1 is used for storing carbon dioxide fire extinguishing medium with pressure in a set interval, i.e. carbon dioxide fire extinguishing medium is kept in the set pressure interval, and keeps a state to be sprayed at any time, if the storage pressure is lower than the set interval, i.e. the temperature setting is low, the storage capacity of the carbon dioxide fire extinguishing medium is increased, but the spraying pressure is reduced, if the storage pressure is higher than the set interval, i.e. the temperature setting is high, the storage capacity of the carbon dioxide fire extinguishing medium is reduced, but the spraying pressure is increased, which needs to be set according to the size of the oil tank 5; for example, for a long transmission distance of more than 500 meters, through a tail end discharge pressure test and measurement of storage tank reserves, the pressure of the storage tank 1 can be kept between 5.0MPa and 5.3MPa, so that a large reserve of carbon dioxide fire extinguishing medium is ensured, a high-pressure to-be-discharged state is also kept, and the high-pressure to-be-discharged state can avoid the problem of ice blockage of a pipeline; the carbon dioxide extinguishing medium comprises gas-phase carbon dioxide 11 and liquid-phase carbon dioxide 12, and the main pipeline 2 extends into the bottom of the storage tank 1 and is in contact with the liquid-phase carbon dioxide 12; once a fire disaster occurs, the main pipeline 2 releases carbon dioxide, the external pressure is small, and the liquid-phase carbon dioxide 12 is instantly changed into gas-phase carbon dioxide 12, so that the oil tank can quickly extinguish the fire and achieve the purpose of cooling the oil tank; the main pipeline 2 is divided into at least one branch pipeline 3, and when one storage tank 1 is only responsible for one oil tank 5, only one branch pipeline 3 is provided; generally, one storage tank 1 is responsible for four oil tanks 5, and is provided with four branch pipelines 3, and a main pipeline 2 is used for conveying carbon dioxide fire extinguishing medium in the storage tank 1 to the branch pipelines 3; one end of each branch pipeline 3 is communicated with an annular pipe 4; the ring pipe 4 is fixed on the floating roof of the oil tank 5 and can move along with the floating roof of the oil tank 5, and the branch pipelines 3 are partially flexible pipelines, so that the ring pipe 4 can move along with the floating roof of the oil tank 5 conveniently; one end of the branch pipeline 3 is communicated with an annular pipe 4 which can be directly communicated or indirectly communicated; the circular pipe 4 uniformly conveys carbon dioxide to the sealing ring equal-division direction of the oil tank 5, the circular pipe 4 is a pipe forming a closed loop, and compared with a pipeline for expanding a spraying opening by dividing two, dividing four and dividing four into eight of a grading pipeline, the circular pipe 4 has small pressure loss, and the phenomena that the air flow of the grading pipeline blocks to cause larger pressure loss and the flow is reduced to form carbon dioxide ice blockage to influence the spraying and releasing of a fire extinguishing medium cannot occur; carbon dioxide is uniformly delivered to the direction of the equal division point of the sealing ring of the oil tank 5, and the carbon dioxide is sprayed approximately near the equal division point of the sealing ring by selecting an appropriate position according to the structure of the oil tank 5, wherein the equal division point can be 12 equal division points or a plurality of equal division points, and the ignition position near the sealing ring is covered on the whole.
Further, the device also comprises a refrigerating assembly 13, a heating assembly 14, a pressure sensor and a controller; the pressure sensor is used for measuring the pressure of the storage tank 1 and transmitting pressure information to the controller; the controller is used for controlling the refrigeration assembly 13 or the heating assembly 14 to work, so that the pressure of the carbon dioxide fire extinguishing medium in the storage tank 1 is controlled within a certain range. According to the structure, when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is lower than the set minimum value, the controller controls the heating assembly 14 to work, the carbon dioxide extinguishing medium in the storage tank 1 is heated and pressurized until the pressure meets the set interval, and the controller controls the heating assembly 14 to stop working; when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is higher than a set maximum value, the controller controls the refrigeration assembly 13 to work, the carbon dioxide extinguishing medium in the storage tank 1 is cooled and depressurized, and the refrigeration assembly 13 is controlled by the controller to stop working until the pressure meets a set interval; the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is always in a set interval; the refrigerating assembly 13 comprises a refrigerating unit and an evaporation coil, and the evaporation coil and the refrigerating unit form a closed loop; the evaporation coil is contacted with the gas phase space and the liquid phase space; the heating assembly comprises a sleeve and a heater; the heater is arranged in the sleeve in a penetrating way; the sleeve is in contact with the gas phase space and the liquid phase space.
Further, the device also comprises a main control valve 15 and a selection valve 16; the main pipeline 2 is provided with a main control valve 15, and the branch pipelines 3 are provided with a selector valve 16; the main control valve 15 is opened later than the selector valve 16. According to the structure, when a fire disaster occurs, the controller controls the corresponding selector valve 16 to be opened, and the corresponding branch pipeline 3 is conducted; then the main control valve 15 is controlled to be opened, and the main pipeline 2 is conducted; because the pressure bearing capacity of the selector valve 16 is smaller than that of the main control valve 15, the selector valve 16 is opened firstly, and then the main control valve 15 is opened, so that the selector valve 16 with low pressure bearing capacity is protected; the controller controls the corresponding selector valve 16 and the main control valve 15 to open or close, and the controller can directly control or indirectly control through pneumatic control.
Further, the ring pipe 4 is uniformly communicated with radial pipes 6 which have the same number as the equal division points of the sealing rings of the oil tank 5; the radial pipe 6 extends towards the equal division point of the sealing ring of the oil tank 5 by taking the ring pipe 4 as a starting point and is used for uniformly conveying the carbon dioxide in the ring pipe 4 to the sealing ring of the oil tank 5 for full-coverage fire extinguishing. According to the structure, the radial pipe 6 starts from the ring pipe 4, the radial pipe 6 is finally arranged near the equal division point of the sealing ring, the ignition position is completely covered, and the end point of the radial pipe 6 is provided with the special carbon dioxide nozzle.
Further, the equal division points of the oil tank 5 sealing rings are twelve. According to the structure, the more the equal division points of the sealing rings are, namely the more the radial pipes 6 are arranged, the greater the engineering difficulty and the cost are, the less the equal division points of the sealing rings are, namely the less the radial pipes 6 are arranged, the spraying and discharging flow of carbon dioxide is influenced, and ice blockage can be caused; twelve equally-divided points of the sealing rings of the oil tank 5 are the coordination of cost and discharge flow, so that the optimal fire extinguishing effect, the pressure-equalizing discharge effect and the low cost effect are achieved.
Further, a straight pipe 8 which is overlapped with the diameter of the ring pipe 4 is arranged on the ring pipe 4; two ends of the straight pipe 8 are communicated with the ring pipe 4; one end of the branch pipeline 3 is communicated with the ring pipe 4 through a straight pipe 8. According to the structure, one end of the branch pipeline 3 is communicated with the circular pipe 4 through the straight pipe 8, so that the circular pipe 4 can be quickly filled with carbon dioxide, and the carbon dioxide is transmitted to a fire extinguishing point.
Further, the temperature of the carbon dioxide extinguishing medium in the storage tank 1 is kept at 14.2-16.7 ℃, and the pressure is kept at 5.0-5.3 MPa. According to the structure, the storage tank 1 needs to be powered, can not be placed on the floating roof of the oil tank 5 and can only be placed outside the cofferdam of the oil tank 5, for the common large oil tank at present, the problem that the fire is extinguished in a long transmission distance of more than 500 meters is urgently solved, the pressure can be kept between 5.0MPa and 5.3MPa through a terminal spraying pressure test and the measurement of the storage tank storage capacity, the large-storage carbon dioxide fire extinguishing medium is ensured, the high-pressure to-be-sprayed state is also kept, and the ice blockage problem of a pipeline can be avoided in the high-pressure to-be-sprayed state.
The utility model has the advantages that:
the utility model discloses a device for fighting oil tank fire with carbon dioxide, which adopts carbon dioxide to extinguish fire for large-scale oil storage tanks, avoids crude oil pollution, and can recycle waste gas, thus being more environment-friendly; gas-liquid two-phase carbon dioxide is adopted for storage, and the pressure is in an interval range, so that the high storage capacity of a fire extinguishing medium and the spraying pressure for fire extinguishing are ensured, the fire extinguishing effect is improved, and ice blockage is avoided; the circular pipe distribution structure is adopted, and different from an I-shaped grading pipe network with two-in-one, four-in-two and eight-in-four traditional gases, the pressure balance is realized through the circular pipe arranged in the center of the floating plate. Tests prove that after 12 radial pipes led out from the ring pipe are equalized, the pressure difference between the farthest end and the nearest end of the system is less than 0.05 MPa. The innovative design of the ring pipe greatly simplifies the gas fire-extinguishing pipe network, reduces the engineering installation difficulty, and enables the carbon dioxide fire-extinguishing system to have the engineering conditions for installation and application in the floating plate of the large-scale oil storage tank. The utility model discloses an equipment and method for putting out a fire disaster of an oil tank by using carbon dioxide, which solves the problems that a large-scale oil storage tank is slow in fire extinguishing speed, pollutes crude oil, has large pressure loss of long-distance conveying fire extinguishing medium, is easy to ice and block, has small storage capacity of fire extinguishing agent and the like.
Drawings
FIG. 1 is a schematic view of the storage tank of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
in the drawings: 1-storage tank, 2-main pipeline, 3-branch pipeline, 4-ring pipe, 5-oil tank, 6-radial pipe, 8-straight pipe, 11-gas phase carbon dioxide, 12-liquid phase carbon dioxide, 13-refrigeration component, 14-heating component, 15-main control valve and 16-selection valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.
The first embodiment is as follows:
see figures 1-2. A device for fighting fire disaster of oil tank with carbon dioxide comprises a storage tank 1, a main pipeline 2, branch pipelines 3 and a ring pipe 4; the storage tank 1 is used for storing carbon dioxide fire extinguishing media with pressure in a set interval, and the carbon dioxide fire extinguishing media comprise gas-phase carbon dioxide 11 and liquid-phase carbon dioxide 12; the main pipeline 2 is divided into at least one branch pipeline 3, and the main pipeline 2 is used for conveying carbon dioxide extinguishing medium in the storage tank 1 to the branch pipeline 3; one end of the branch pipeline 3 is communicated with an annular pipe 4; the ring pipe 4 is fixed on the floating roof of the oil tank 5 and used for uniformly conveying carbon dioxide to the equal division point direction of the sealing ring of the oil tank 5. As can be seen from the above structure, the storage tank 1 is used for storing the carbon dioxide fire extinguishing medium with the pressure in the set interval, i.e. the carbon dioxide fire extinguishing medium is kept in the set pressure interval and kept in the state to be sprayed at any time, if the pressure is lower than the set interval, the capacity of the carbon dioxide fire extinguishing medium is increased, but the spraying pressure is decreased, if the pressure is higher than the set interval, the capacity of the carbon dioxide fire extinguishing medium is decreased, but the spraying pressure is increased, which needs to be set according to the size of the oil tank 5; for example, for a long transmission distance of more than 500 meters, through a tail end discharge pressure test and measurement of storage tank reserves, the pressure can be kept between 5.0MPa and 5.3MPa, so that a large-reserve carbon dioxide fire extinguishing medium is ensured, a high-pressure to-be-discharged state is also kept, and the high-pressure to-be-discharged state can avoid the problem of ice blockage of a pipeline; the carbon dioxide extinguishing medium comprises gas-phase carbon dioxide 11 and liquid-phase carbon dioxide 12, and the main pipeline 2 extends into the bottom of the storage tank 1 and is in contact with the liquid-phase carbon dioxide 12; once a fire disaster occurs, the main pipeline 2 releases carbon dioxide, the external pressure is small, and the liquid-phase carbon dioxide 12 is instantly changed into gas-phase carbon dioxide 12, so that the oil tank can quickly extinguish the fire and achieve the purpose of cooling the oil tank; the main pipeline 2 is divided into at least one branch pipeline 3, and when one storage tank 1 is only responsible for one oil tank 5, only one branch pipeline 3 is provided; generally, one storage tank 1 is responsible for four oil tanks 5, and is provided with four branch pipelines 3, and a main pipeline 2 is used for conveying carbon dioxide fire extinguishing medium in the storage tank 1 to the branch pipelines 3; one end of each branch pipeline 3 is communicated with an annular pipe 4; the ring pipe 4 is fixed on the floating roof of the oil tank 5 and can move along with the floating roof of the oil tank 5, and the branch pipelines 3 are partially flexible pipelines, so that the ring pipe 4 can move along with the floating roof of the oil tank 5 conveniently; one end of the branch pipeline 3 is communicated with an annular pipe 4 which can be directly communicated or indirectly communicated; the circular pipe 4 uniformly conveys carbon dioxide to the sealing ring equal-division direction of the oil tank 5, the circular pipe 4 is a pipe forming a closed loop, and compared with a pipeline for expanding a spraying opening by dividing two, dividing four and dividing four into eight of a grading pipeline, the circular pipe 4 has small pressure loss, and the phenomena that the air flow of the grading pipeline blocks to cause larger pressure loss and the flow is reduced to form carbon dioxide ice blockage to influence the spraying and releasing of a fire extinguishing medium cannot occur; carbon dioxide is uniformly fed to the direction of the equal division point of the seal ring of the oil tank 5, and an appropriate position is selected according to the structure of the oil tank 5, and the ignition position near the seal ring is covered on the whole surface, wherein the equal division point is approximately near the equal division point of the seal ring, and can be 12 equal division points or a plurality of equal division points.
The refrigerator also comprises a refrigerating component 13, a heating component 14, a pressure sensor and a controller; the pressure sensor is used for measuring the pressure of the storage tank 1 and transmitting pressure information to the controller; the controller is used for controlling the refrigeration assembly 13 or the heating assembly 14 to work, so that the pressure of the carbon dioxide fire extinguishing medium in the storage tank 1 is controlled within a certain range. According to the structure, when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is lower than the set minimum value, the controller controls the heating assembly 14 to work, the carbon dioxide extinguishing medium in the storage tank 1 is heated and pressurized until the pressure meets the set interval, and the controller controls the heating assembly 14 to stop working; when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is higher than a set maximum value, the controller controls the refrigeration assembly 13 to work, the carbon dioxide extinguishing medium in the storage tank 1 is cooled and depressurized, and the refrigeration assembly 13 is controlled by the controller to stop working until the pressure meets a set interval; the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is always in a set interval; the refrigerating assembly 13 comprises a refrigerating unit and an evaporation coil, and the evaporation coil and the refrigerating unit form a closed loop; the evaporation coil is contacted with the gas phase space and the liquid phase space; the heating assembly comprises a sleeve and a heater; the heater is arranged in the sleeve in a penetrating way; the sleeve is in contact with the gas phase space and the liquid phase space.
Also comprises a main control valve 15 and a selection valve 16; the main pipeline 2 is provided with a main control valve 15, and the branch pipelines 3 are provided with a selector valve 16; the main control valve 15 is opened later than the selector valve 16. According to the structure, when a fire disaster occurs, the controller controls the corresponding selector valve 16 to be opened, and the corresponding branch pipeline 3 is conducted; then the main control valve 15 is controlled to be opened, and the main pipeline 2 is conducted; because the pressure bearing capacity of the selector valve 16 is smaller than that of the main control valve 15, the selector valve 16 is opened firstly, and then the main control valve 15 is opened, so that the selector valve 16 with low pressure bearing capacity is protected; the controller controls the corresponding selector valve 16 and the main control valve 15 to open or close, and the controller can directly control or indirectly control through pneumatic control.
The ring pipe 4 is uniformly communicated with radial pipes 6 with the same number as equal division points of the sealing rings of the oil tank 5; the radial pipe 6 extends towards the equal division point of the sealing ring of the oil tank 5 by taking the ring pipe 4 as a starting point and is used for uniformly conveying the carbon dioxide in the ring pipe 4 to the sealing ring of the oil tank 5 for full-coverage fire extinguishing. According to the structure, the radial pipe 6 starts from the ring pipe 4, the radial pipe 6 is finally arranged near the equal division point of the sealing ring, the ignition position is completely covered, and the end point of the radial pipe 6 is provided with the special carbon dioxide nozzle.
The equal division points of the sealing rings of the oil tank 5 are twelve. According to the structure, the more the equal division points of the sealing rings are, namely the more the radial pipes 6 are arranged, the greater the engineering difficulty and the cost are, the less the equal division points of the sealing rings are, namely the less the radial pipes 6 are arranged, the spraying and discharging flow of carbon dioxide is influenced, and ice blockage can be caused; twelve equally-divided points of the sealing rings of the oil tank 5 are the coordination of cost and discharge flow, so that the optimal fire extinguishing effect and the low-cost effect are achieved.
The ring pipe 4 is provided with a straight pipe 8 with the diameter overlapped with that of the ring pipe 4; two ends of the straight pipe 8 are communicated with the ring pipe 4; one end of the branch pipeline 3 is communicated with the ring pipe 4 through a straight pipe 8. According to the structure, one end of the branch pipeline 3 is communicated with the circular pipe 4 through the straight pipe 8, so that the circular pipe 4 can be quickly filled with carbon dioxide, and the carbon dioxide is transmitted to a fire extinguishing point.
The temperature of the carbon dioxide extinguishing medium in the storage tank 1 is kept at 14.2-16.7 ℃, and the pressure is kept at 5.0-5.3 MPa. According to the structure, the storage tank 1 needs to be powered, can not be placed on the floating roof of the oil tank 5 and can only be placed outside the cofferdam of the oil tank 5, for the common large oil tank at present, the problem that the fire is extinguished in a long transmission distance of more than 500 meters is urgently solved, the pressure can be kept between 5.0MPa and 5.3MPa through a terminal spraying pressure test and the measurement of the storage tank storage capacity, the large-storage carbon dioxide fire extinguishing medium is ensured, the high-pressure to-be-sprayed state is also kept, and the ice blockage problem of a pipeline can be avoided in the high-pressure to-be-sprayed state.
A fire detector is arranged on the oil tank 5; the equipment for fighting fire in the oil tank 5 by using carbon dioxide comprises a safety step, a constant pressure step, a fire extinguishing step and an ending step;
the safety steps are as follows: when the fire detector does not detect that the oil tank 5 is in fire, all the selector valves 16 are closed, and all the branch pipelines 3 are not communicated; the main control valve 15 is closed, and the main pipeline 2 is not conducted;
the constant pressure step is as follows: when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is lower than a set minimum value, the controller controls the heating assembly 14 to work, the carbon dioxide extinguishing medium in the storage tank 1 is heated and pressurized until the pressure meets a set interval, and the controller controls the heating assembly 14 to stop working; when the pressure sensor monitors that the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is higher than a set maximum value, the controller controls the refrigeration assembly 13 to work, the carbon dioxide extinguishing medium in the storage tank 1 is cooled and depressurized, and the refrigeration assembly 13 is controlled by the controller to stop working until the pressure meets a set interval; the pressure of the carbon dioxide extinguishing medium in the storage tank 1 is always in a set interval;
the fire extinguishing step is as follows: when the fire detector detects that the oil tank 5 has a fire, the fire detector transmits the detected information of the oil tank 5 to the controller; the controller controls the corresponding selector valve 16 to be opened, and the corresponding branch pipeline 3 is communicated; then the main control valve 15 is controlled to be opened, and the main pipeline 2 is conducted; the carbon dioxide fire extinguishing medium in the storage tank 1 sequentially passes through the main pipeline 2, the branch pipelines 3 and the straight pipe 8 to reach the ring pipe 4; the carbon dioxide fire extinguishing medium is communicated to twelve equally divided points of the sealing rings of the oil tank 5 from twelve radial pipes 6 on the circular pipe 4 to carry out full-coverage fire extinguishing on the sealing rings of the oil tank 5;
the finishing steps are as follows: after the fire extinguishing step, when the fire detector does not detect that the oil tank 5 has a fire, the main control valve 15 is closed, and the main pipeline 2 is not conducted; the corresponding selector valve 16 is closed and the corresponding branch line 3 is not conducted.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (7)
1. The utility model provides an equipment of oil tank fire is suppressed with carbon dioxide which characterized in that: comprises a storage tank (1), a main pipeline (2), branch pipelines (3) and a ring pipe (4); the storage tank (1) is used for storing carbon dioxide fire extinguishing medium with pressure in a set interval, and the carbon dioxide fire extinguishing medium comprises gas-phase carbon dioxide (11) and liquid-phase carbon dioxide (12); the main pipeline (2) is divided into at least one branch pipeline (3), and the main pipeline (2) is used for conveying carbon dioxide extinguishing medium in the storage tank (1) to the branch pipeline (3); one end of the branch pipeline (3) is communicated with a ring pipe (4); the ring pipe (4) is fixed on the floating roof of the oil tank (5) and is used for uniformly conveying carbon dioxide to the direction of equal division points of a sealing ring of the oil tank (5).
2. The apparatus for fighting a fire in an oil tank using carbon dioxide as set forth in claim 1, wherein: the refrigerator also comprises a refrigeration component (13), a heating component (14), a pressure sensor and a controller; the pressure sensor is used for measuring the pressure of the storage tank (1) and transmitting pressure information to the controller; the controller is used for controlling the refrigeration assembly (13) or the heating assembly (14) to work, so that the pressure of the carbon dioxide fire extinguishing medium in the storage tank (1) is controlled within a certain range.
3. The apparatus for fighting a fire in an oil tank using carbon dioxide as set forth in claim 2, wherein: the device also comprises a main control valve (15) and a selection valve (16); a main control valve (15) is arranged on the main pipeline (2), and a selector valve (16) is arranged on the branch pipeline (3); the main control valve (15) is opened later than the selection valve (16).
4. An apparatus for fighting a fire in a tank with carbon dioxide as set forth in claim 3, wherein: radial pipes (6) with the same number as the equal division points of the sealing rings of the oil tank (5) are uniformly communicated with the ring pipe (4); the radial pipe (6) extends towards the equal division point of the sealing ring of the oil tank (5) by taking the circular pipe (4) as a starting point and is used for uniformly conveying the carbon dioxide in the circular pipe (4) to the sealing ring of the oil tank (5) to carry out full-coverage fire extinguishing.
5. The apparatus for fighting a fire in an oil tank using carbon dioxide as set forth in claim 4, wherein: the equal division of the sealing rings of the oil tank (5) is twelve.
6. The apparatus for fighting a fire in an oil tank using carbon dioxide as set forth in claim 5, wherein: a straight pipe (8) with the diameter overlapped with that of the ring pipe (4) is arranged on the ring pipe (4); two ends of the straight pipe (8) are communicated with the ring pipe (4); one end of the branch pipeline (3) is communicated with the ring pipe (4) through a straight pipe (8).
7. An apparatus for fighting a fire in an oil tank with carbon dioxide as set forth in any one of claims 1 to 6, wherein: the temperature of the carbon dioxide extinguishing medium in the storage tank (1) is kept at 14.2-16.7 ℃, and the pressure is kept at 5.0-5.3 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920445340.3U CN210145346U (en) | 2019-04-03 | 2019-04-03 | Equipment for fighting fire of oil tank by carbon dioxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920445340.3U CN210145346U (en) | 2019-04-03 | 2019-04-03 | Equipment for fighting fire of oil tank by carbon dioxide |
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| CN210145346U true CN210145346U (en) | 2020-03-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954241A (en) * | 2019-04-03 | 2019-07-02 | 威特龙消防安全集团股份公司 | A kind of device and method with carbon dioxide Extinguish The Fire On Oil |
| EP4166198A4 (en) * | 2020-06-16 | 2024-06-19 | Jetfreezr Tecnologia Limitada | System and method for fighting fires in flammable liquids stored in atmospheric tanks |
-
2019
- 2019-04-03 CN CN201920445340.3U patent/CN210145346U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954241A (en) * | 2019-04-03 | 2019-07-02 | 威特龙消防安全集团股份公司 | A kind of device and method with carbon dioxide Extinguish The Fire On Oil |
| EP4166198A4 (en) * | 2020-06-16 | 2024-06-19 | Jetfreezr Tecnologia Limitada | System and method for fighting fires in flammable liquids stored in atmospheric tanks |
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