CN116196572B - Fire extinguishing system and oil tank - Google Patents

Abstract

The application discloses a fire-fighting system and an oil tank with the fire-fighting system, wherein the fire-fighting system comprises a floating disc, a floating platform, a mixed liquid pipe, a plurality of foam conveying pipes, a plurality of floating bodies, a controller, an alarm device and a plurality of smoke sensors, and the floating platform is detachably arranged on the floating disc; the mixed liquid pipe is arranged on the floating platform, the upper end of the mixed liquid pipe is positioned above the floating platform and is provided with a foam generator, and the output end of the foam generator is provided with a foam distributor; the foam conveying pipes are radially arranged on the foam distributor, all the foam conveying pipes are positioned above the floating platform and the floating disc, and a plurality of foam spraying sub-pipes are arranged on all the foam conveying pipes; the floating body is connected with the foam conveying pipe and can be propped against the upper surface of the floating disc. The floating body floats the foam conveying pipe, the foam distributor, the foam generator, part of the structures of the mixed liquid pipe and the floating platform, so that the foam can be sprayed on the liquid surface, thereby extinguishing the fire source on the liquid surface and improving the safety of the oil tank.

Description

Fire extinguishing system and oil tank

Technical Field

The application relates to the technical field of containers, in particular to a fire-fighting system and an oil tank.

Background

The floating roof of the floating roof storage tank is a floating top cover floating on the surface of the liquid storage, and floats up and down along with the input and output of the liquid storage, an annular space is arranged between the floating roof (floating disc) and the tank wall, and a sealing ring is arranged in the annular space, so that the liquid in the tank is isolated from the atmosphere when the top cover floats up and down, and the evaporation loss of the liquid storage in the storage process is greatly reduced. The floating roof storage tank with the liquid storage being oil is also called an oil tank, and the oil is generally characterized by inflammability, explosiveness and volatility, and is easy to cause fire, so the oil tank has very high requirements on fire protection. The fire types of the oil tank are generally classified into seal ring point type local/ring type belt fire, floating disc chuck semi-liquid level fire, full liquid level fire, flowing fire and the like.

At present, foam spraying equipment is generally arranged on the top of the tank wall of the oil tank or on the floating disc, however, when a fire disaster occurs, the situation of sinking the disc can occur due to corrosion of the chuck and the floating roof, improper operation and other reasons, and then the fire disaster of the whole liquid level is caused, at the moment, the foam spraying equipment arranged on the floating disc fails, and the foam spraying equipment arranged on the top of the tank wall of the oil tank is far away from a fire source, so that the fire extinguishing effect is greatly reduced, and the fire can be extinguished only by manpower, and the efficiency is low and the loss is large.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a fire-fighting system which can be used for extinguishing fire on the whole liquid level, can extinguish fire in time and has good fire-extinguishing effect.

The application also provides an oil tank with the fire-fighting system.

According to the fire protection system, the embodiment of the first aspect of the application comprises a floating disc, a floating platform, a mixed liquid pipe, a plurality of foam conveying pipes, a plurality of floating bodies, a controller, an alarm device and a plurality of smoke sensors, wherein the floating disc is arranged in a tank body, a stepped through hole is formed in the central axis of the floating disc, and the stepped through hole is large in upper part and small in lower part; the floating platform penetrates through the stepped through hole, the floating disc is detachably connected with the floating platform through a plurality of connecting mechanisms, the floating platform is separated from the floating disc when the floating disc is immersed into the liquid level of the tank body, and a mounting hole is formed in the central axis of the floating platform; the mixed liquid pipe is connected with the floating platform and penetrates through the mounting hole, the upper end of the mixed liquid pipe is positioned above the floating platform and provided with a foam generator, the output end of the foam generator is provided with a foam distributor, and the lower end of the mixed liquid pipe is connected with a mixed liquid supply device; the foam conveying pipes are radially arranged on the foam distributor, all the foam conveying pipes are positioned above the floating platform and the floating disc, and a plurality of foam spraying branch pipes are arranged on all the foam conveying pipes; the number of the floating bodies is multiple, and the floating bodies are connected with the foam conveying pipe and can prop against the upper surface of the floating disc; the smoke sensor is arranged above the floating disc and opposite to the foam conveying pipe, and the controller is electrically connected with the alarm device and the smoke sensor.

Has at least the following beneficial effects: when the floating disc is submerged, the fire disaster develops into a fire disaster with a full liquid level, the floating disc is immersed into the liquid level of the tank body, the connecting mechanism is disengaged, the floating body is separated from the floating disc, the floating body has buoyancy, the floating body floats up the foam conveying pipe, the foam distributor, the foam generator, the part of the mixed liquid pipe and the floating platform, the foam generator, the foam distributor and the foam conveying pipe are still positioned above the liquid level, the mixed liquid pipe, the foam generator, the foam distributor and the foam conveying pipe can still work normally, and the foam conveyed by the foam conveying pipe is sprayed on the liquid level through the foam spraying branched pipe, so that the fire source of the liquid level is extinguished, and the safety of the oil tank is improved.

According to some embodiments of the application, all the foam conveying pipes are provided with a first switch valve in a region close to the foam dispenser, the first switch valve is a normally open electronic valve, and the controller is electrically connected with the first switch valve.

According to some embodiments of the application, the foam delivery tube comprises a first section and a second section, wherein one end of the first section is provided with the first switch valve and is connected with the foam dispenser, and one end of the second section is slidably inserted into the other end of the first section.

According to some embodiments of the present application, the upper surface of the floating disc is bent downward with a point where the central axis of the floating disc is located as a center, the upper surface of the floating platform is lower than or flush with the lowest point of the upper surface of the floating disc, a water accumulation groove is formed at the central axis of the floating platform, the mounting hole is formed at the central axis of the bottom of the water accumulation groove, the mixing liquid pipe is provided with a plurality of water-gas switching holes in a region corresponding to the water accumulation groove, a deformable elastic baffle ring is arranged in the mixing liquid pipe, one end of the elastic baffle ring is in sealing connection with the inner wall of the mixing liquid pipe, the water-gas switching holes are located above the elastic baffle ring and can drain to the mixing liquid pipe, when the mixing liquid pipe drains, the other end of the elastic baffle ring is deformed downward under the action of water pressure and gradually contracts to form a funnel-shaped structure, when the mixing liquid supply device supplies the mixing liquid to the mixing liquid pipe, the other end of the elastic baffle ring is deformed upward under the action of the mixing liquid pressure and gradually contracts to form an inverted water-gas switching hole, one end of the elastic baffle ring is in sealing connection with the inner wall of the mixing liquid pipe, the elastic baffle ring forms a negative pressure switching hole, and the negative pressure switching hole forms a pressure structure between the elastic baffle ring and the mixing liquid pipe and the inner wall.

According to some embodiments of the application, the mixed liquid pipe comprises an upper pipe and a lower pipe which are connected, the water-gas switching hole is arranged at the lower end of the upper pipe, one end of the elastic baffle ring is provided with an outer edge, and the outer edge is arranged between the upper pipe and the lower pipe to limit and fix the elastic baffle ring.

According to some embodiments of the application, a hose is connected to the lower end of the liquid mixing pipe, the hose is disposed in the tank, a tee is connected to the lower end of the hose, a first end of the tee is used for being connected to the tank and extending into the tank, the hose is communicated with the first end of the tee, a second switch valve and a third switch valve are respectively connected to the second end and the third end of the tee, and the third switch valve is connected to the liquid mixing supply device.

According to some embodiments of the application, the connecting mechanism comprises a bolt horizontally arranged on the floating disc, and a pin hole for the bolt to be inserted is arranged on the floating platform in a region corresponding to the bolt.

According to some embodiments of the application, the connecting mechanism further comprises a first connecting rod, a floater and a second connecting rod, wherein two ends of the first connecting rod are respectively hinged with the floating disc and the floater, and two ends of the second connecting rod are respectively connected with the bolt and the floater.

According to some embodiments of the application, the floating platform and the floating disc are respectively provided with a first U-shaped block and a second U-shaped block which are inverted, the floating platform and the first U-shaped block enclose a limiting hole for limiting the bolt, and the floating disc and the second U-shaped block enclose the pin hole.

According to some embodiments of the application, the stepped through hole comprises a first section, a second section and a third section which are arranged from top to bottom, the second section is in an inverted truncated cone shape, and the first section and the third section are both in a column shape.

According to a second aspect of the application, the oil tank comprises a tank body and the fire protection system according to the first aspect of the application, wherein the floating disc is arranged in the tank body and can float on the liquid surface of the tank body.

Has at least the following beneficial effects: the oil tank has all the advantageous effects brought by the fire fighting system of the above embodiment, and the description thereof will not be repeated here.

According to some embodiments of the application, the seal ring further comprises a seal ring, wherein the seal ring comprises a bag body which is annular and is connected with the outer edge of the floating disc, the bag body is filled with water, and the bag body is abutted with the inner wall of the tank body.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The application is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of a fire protection system and an oil tank according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of the structure of a floating platform and a mixed liquor pipe in the fire fighting system according to the embodiment of the application;

FIG. 4 is a schematic cross-sectional view of a floating platform and a mixing fluid pipe when the fire protection system according to the embodiment of the application is used for draining water;

FIG. 5 is a schematic cross-sectional view of a floating platform and a liquid mixture pipe when the fire protection system of the embodiment of the application is used for conveying liquid mixture;

FIG. 6 is an enlarged schematic view of a portion of FIG. 5B;

reference numerals: the floating disc 100, the stepped through hole 110, the latch 120, the first link 130, the float 140, the second link 150, the floating platform 200, the mounting hole 210, the water accumulation tank 220, the mixed liquid pipe 300, the water gas switching hole 310, the upper pipe 320, the first flange 321, the lower pipe 330, the second flange 331, the second switching valve 340, the third switching valve 350, the negative pressure area 360, the foam generator 400, the foam distributor 410, the foam delivery pipe 500, the first switching valve 510, the foam injection branch pipe 520, the first section 530, the second section 540, the float 600, the snap ring 700, the outer edge 710, the telescopic mechanism 800, and the tank 900.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 and 2, the present application discloses a fire fighting system including a floating disc 100, a floating platform 200, a mixing fluid pipe 300, a plurality of foam delivery pipes 500, a plurality of floating bodies 600, a controller, an alarm device, and a plurality of smoke sensors. The floating disc 100 is arranged in the tank body 900, a stepped through hole 110 is formed in the central axis of the floating disc 100, and the stepped through hole 110 is large in upper part and small in lower part; the floating platform 200 is arranged through the stepped through hole 110 in a penetrating way, the floating disc 100 is detachably connected with the floating platform 200 through a plurality of connecting mechanisms, when the floating disc 100 is immersed into the liquid level of the tank 900, the floating platform 200 is separated from the floating disc 100, and the installation hole 210 is formed in the central axis of the floating platform 200.

Referring to fig. 3 to 4, a mixing fluid pipe 300 is connected with the floating platform 200 and penetrates through the mounting hole 210, the upper end of the mixing fluid pipe 300 is positioned above the floating platform 200 and provided with a foam generator 400, the output end of the foam generator 400 is provided with a foam dispenser 410, and the lower end of the mixing fluid pipe 300 is connected with a mixing fluid supply device. The foam conveying pipes 500 are radially arranged on the foam distributor 410, all the foam conveying pipes 500 are positioned above the floating platform 200 and the floating disc 100, and a plurality of foam spraying branched pipes 520 are arranged on all the foam conveying pipes 500. The number of the floating bodies 600 is plural, and the floating bodies 600 are connected with the foam transfer pipe 500 and can be abutted against the upper surface of the floating disc 100. The smoke sensor is arranged above the floating disc 100 and opposite to the foam conveying pipe 500, and the controller is electrically connected with the alarm device and the smoke sensor.

The combined upper surface of the oil tank inner cavity/floating disc 100 and the sealing ring is divided into a plurality of sector areas, each area is correspondingly provided with at least one foam conveying pipe 500 and at least one smoke sensor, when a fire disaster occurs in a certain area, the smoke sensors can timely detect signals, the smoke sensors transmit fire signals to the controller, the controller sends instruction signals to the alarm device, the alarm device works normally, and sound and light alarm is sent out, so that personnel are reminded of the fire disaster. The mixed liquid supply means supplies the mixed liquid to the foam generator 400, and the mixed liquid forms foam in the foam generator 400, and then the foam enters each foam delivery pipe 500 through the foam dispenser 410, and is then sprayed on the tank through the foam spraying branch pipe 520 on the foam delivery pipe 500.

When the floating plate 100 is submerged, the floating platform 200 is detachably penetrated through the stepped through hole 110, the connecting mechanism disconnects the floating platform 200 and the floating plate 100, the floating body 600 is connected with the foam conveying pipe 500, the floating body 600 has buoyancy, the floating body 600 floats the foam conveying pipe 500, the foam distributor 410, the foam generator 400, part of the structures of the mixed liquid pipe 300 and the floating platform 200, the foam generator 400, the foam distributor 410 and the foam conveying pipe 500 are still positioned above the liquid level, the mixed liquid pipe 300, the foam generator 400, the foam distributor 410 and the foam conveying pipe 500 can still work normally, and the foam conveyed by the foam conveying pipe 500 is sprayed on the liquid level through the foam spraying branched pipe 520, so that the fire source is extinguished, and the safety of the oil tank is improved.

It will be appreciated that the number of foam ducts 500 and the number of foam branches 520 on the foam ducts 500 may depend on the actual size of the tank/pan 100, and that the larger the tank/pan 100, the greater the number of foam ducts 500 and the number of foam branches 520 on the foam ducts 500, subject to the foam being ejected by the foam branches 520 to cover the full liquid surface.

The number of floating bodies 600 is half or one or two times the number of foam transfer pipes 500. In this embodiment, the number of floating bodies 600 is four, and the number of foam transfer pipes 500 is eight. The number of floating bodies 600 should also be set according to the amount of water discharged from the floating bodies 600 and the total weight of the floating platform 200, the foam transfer pipe 500, the foam dispenser 410, the foam generator 400, and the mixing fluid pipe 300. The smoke sensor is connected with the foam conveying pipe 500 or the floating disc 100 or the floating platform 200 or the tank 900 through the supporting rod, and is positioned above the foam conveying pipe 500.

All foam conveying pipes 500 are provided with a first switch valve 510 in a region close to the foam distributor 410, the first switch valve 510 is a normally open electronic valve, a controller is electrically connected with the first switch valve 510, the controller can send instructions to the first switch valve 510, and the first switch valve 510 acts, so that the switching of the open state and the closed state of the first switch valve 510 is completed.

The first switch valve 510 is an electronic valve that is normally open, and the controller is not required to send an instruction to the first switch valve 510, and the first switch valve 510 is opened, so that the first switch valve 510 cannot be opened when the controller is prevented from being failed or a line between the controller and the first switch valve 510 is prevented from being failed, and further, the foam conveying pipe 500 and the foam injection branch pipe 520 cannot work. When the oil tank is in fire, the first switch valve 510 on the foam conveying pipe 500 corresponding to the area without fire receives the signal for closing the first switch valve 510, and the foam conveying pipe 500 corresponding to the area without fire is closed, so that the foam is prevented from being conveyed to the area without fire by mistake, and the functions of accurately extinguishing fire and saving resources and cost are achieved.

It will also be appreciated that the portion of the foam delivery pipe 500 is provided with the foam injection branch pipe 520 only above the gasket between the corresponding tank 900 and the float 100, and that the foam delivered by the portion of the foam delivery pipe 500 is used to extinguish the fire source in the vicinity of the gasket, i.e., to extinguish the gasket-type localized/looped belt fire. When a sealing ring type partial/ring type fire occurs, the first switching valve 510 on the portion of the foam conveying pipe 500 is maintained to be opened without maintaining the first switching valve 510 on the other portion of the foam conveying pipe 500 to be opened, that is, without conveying foam to the other portion of the foam conveying pipe 500, so that the area where the sealing ring type partial/ring type fire occurs is ensured to have enough foam, thereby achieving rapid fire extinguishing and resource saving effects.

The fire protection system further comprises a plurality of infrared sensors arranged at the top of the tank body 900, a temperature sensor and a gas sensor arranged on the foam conveying pipe 500 and a liquid level sensor arranged on the floating body 600, wherein the infrared sensors, the temperature sensor, the gas sensor and the liquid level sensor are electrically connected with the controller. The infrared sensors face the areas of the oil tank, when a fire disaster occurs in a certain area, abnormal signals generated by the infrared sensors are fed back to the controller, so that the controller judges whether the fire disaster occurs or not, and then the opening of the alarm device is controlled. The temperature sensor and the gas sensor are respectively used for detecting whether the temperature and the gas of each area are abnormal or not, and the controller is helped to judge whether the area has a fire disaster or a risk after the potential occurrence. The liquid level sensor is used for detecting whether the floating disc 100 of the oil tank is sunk into the liquid level, all or part of the liquid level sensor is sunk into the liquid level, the liquid level sensor sends a signal to the controller, and when an instruction sent by the liquid level sensor indicates that the set threshold value is reached, the controller judges that the oil tank is sunk into the oil tank.

The upper surface of the floating disc 100 is bent downward with the point of the central axis of the floating disc 100 as the center, and the upper surface of the floating platform 200 is lower than or flush with the lowest point of the upper surface of the floating disc 100, so that the water on the upper surface of the floating disc 100 flows onto the floating platform 200. Referring to fig. 3 and 4, a water accumulation groove 220 is formed at a central axis of the floating platform 200, a mounting hole 210 is formed at a central axis of a groove bottom of the water accumulation groove 220, a plurality of water-gas switching holes 310 are formed in a region of the mixed liquid pipe 300 corresponding to the water accumulation groove 220, and water on the floating platform 200 can flow into the water accumulation groove 220 and enter the mixed liquid pipe 300 through the water-gas switching holes 310.

The mixing liquid pipe 300 is internally provided with a deformable elastic baffle ring 700, one end of the elastic baffle ring 700 is in sealing connection with the inner wall of the mixing liquid pipe 300, and the water-gas switching hole 310 is positioned above the elastic baffle ring 700 and can drain water to the mixing liquid pipe 300. Referring to fig. 4, when the mixing fluid pipe 300 drains, the other end of the snap ring 700 is deformed downward by the water pressure and gradually contracts to form a funnel-shaped structure. The water on the floating platform 100 and the floating platform 200 can sequentially enter the water accumulation tank 220, the water-air switching hole 310 and the mixed liquid pipe 300, and the mixed liquid pipe 300 discharges the water, so that the water is prevented from accumulating on the floating platform 200 and the floating platform 100, and the floating platform 200 and the floating platform 100 are prevented from bearing overweight to cause a sinking accident, and the water is rainwater or water sprayed by fire extinguishment. Or initially, the snap ring 700 is an upstanding funnel structure.

Referring to fig. 5 and 6, when the mixed liquid supply apparatus supplies the mixed liquid to the mixed liquid pipe 300, since the snap ring 700 is elastically deformable, the other end of the snap ring 700 is deformed upward and gradually contracted by the mixed liquid pressure to form an inverted funnel structure, the water gas switching hole 310 faces the snap ring 700, the snap ring 700 forms a venturi structure with the mixed liquid pipe 300 and forms a negative pressure region 360 between the outer wall of the snap ring 700 and the inner wall of the mixed liquid pipe 300, and the water gas switching hole 310 supplements gas to the negative pressure region 360. The mixed liquid pipe 300 sucks air and gas, and the air and the mixed liquid are mixed to have a certain foaming effect.

The mixing liquid pipe 300 includes an upper pipe 320 and a lower pipe 330 connected to each other, the water-gas switching hole 310 is provided at the lower end of the upper pipe 320, and the water-gas switching hole 310 is close to the bottom of the water accumulation tank 220. One end of the elastic baffle ring 700 is provided with an outer edge 710, the outer edge 710 is arranged between the upper tube 320 and the lower tube 330, and the upper tube 320 and the lower tube 330 clamp the outer edge 710, so that the elastic baffle ring 700 is limited and fixed.

Referring to fig. 6, the lower end surface of the upper tube 320 is provided with a first flange 321, the upper end surface of the lower tube 330 is provided with a second flange 331, and the outer rim 710 is located between the first flange 321 and the second flange 331. The fire protection system has a plurality of fasteners that simultaneously penetrate the first flange 321, the outer rim 710, and the second flange 331 and connect the first flange 321, the outer rim 710, and the second flange 331 together. The mixing fluid tube 300 adopts a split manner of the upper tube 320 and the lower tube 330, and is convenient for installing, detaching, checking and replacing the elastic baffle ring 700.

In another embodiment, the water-gas switching hole 310 is provided with a one-way air curtain or a one-way valve structure, so that water in the water tank 220 can enter the mixed liquid pipe 300 through the water-gas switching hole 310, and the mixed liquid in the mixed liquid pipe 300 cannot be discharged to the water tank 220 through the water-gas switching hole 310.

The mixed liquid pipe 300 has the functions of draining and conveying mixed liquid, and the two functions do not need to be carried out simultaneously, the mixed liquid pipe 300 realizes dual purposes, the mixed liquid pipe 300 is fully utilized, the arrangement of pipelines is reduced, materials are saved, the structure is simplified, and the installation of a fire-fighting system is facilitated.

The lower extreme of mixing liquid pipe 300 is connected with the hose, and the hose is located in the jar body 900, can avoid the hose to expose outside jar body 900, and then reduces the risk that the hose takes place to damage.

Referring to fig. 1, a tee is connected to a lower end of a hose, a first end of the tee is connected to the tank 900 and extends into the tank 900, the hose is connected to the first end of the tee, a second switch valve 340 and a third switch valve 350 are connected to a second end and a third end of the tee, respectively, and the third switch valve 350 is connected to a mixed liquid supply device. When the second switching valve 340 is opened and the third switching valve 350 is closed, water may be discharged through the mixing liquid pipe 300, the hose and the second switching valve 340; when the second switching valve 340 is closed and the third switching valve 350 is opened, the mixed liquor may be transferred to the foam generator 400 through the third switching valve 350, the hose and the mixed liquor pipe 300.

It is to be understood that the third switch valve 350 is connected with a foam mixed liquid tank through a connecting pipe, and a one-way valve, a mixed liquid pump and a foam injection device are sequentially arranged on the connecting pipe from the third switch valve 350 to the foam mixed liquid tank. The connecting pipe, the foam mixed liquid tank, the one-way valve, the mixed liquid pump and the foam injection device form a mixed liquid supply device. The mixed liquor pump delivers the mixed liquor of the foam mixed liquor tank to the hose through the connection pipe, and then sequentially delivers the mixed liquor to the mixed liquor pipe 300 and the foam generator 400, and the mixed liquor forms foam in the foam generator 400. The foam injection device is used for being externally connected with other foam mixed liquid tanks or fire engines. The one-way valve has the function of preventing the mixed liquid from flowing reversely or water from entering the foam mixed liquid tank.

The second switch valve 340 and the third switch valve 350 are electronic valves, and the controller is electrically connected with the second switch valve 340, the third switch valve 350 and the mixed liquid pump. Of course, in order to avoid that the mixed liquor pipe 300 cannot normally work when the controller, the second switching valve 340 and the third switching valve 350 fail, that is, the second end and the third end of the tee cannot normally be opened or closed, a first bypass pipe and a second bypass pipe are respectively arranged on the second end and the third end of the tee, and a fourth switching valve and a fifth switching valve which are manually operated are respectively arranged on the first bypass pipe and the second bypass pipe.

The fire extinguishing system further comprises a spraying mechanism and a water collecting tank, the spraying mechanism is arranged on the outer wall of the tank body 900, a water spraying port of the spraying mechanism faces the outer wall of the tank body 900, the spraying mechanism sprays water to the tank body 900, the temperature of the tank body 900 and the temperature of oil in the tank body 900 can be reduced, and fire extinguishing is facilitated. The water collecting tank is annular and is used for winding the periphery of the foundation arranged on the tank body 900, and water reserved on the tank body 900 flows into the water collecting tank to avoid water accumulation in the area where the oil tank is located. When oil leakage occurs in the oil tank, the water collecting tank also plays a role in collecting oil.

The spraying mechanism comprises a water distribution pipe, the water distribution pipe is annular and sleeved at the top of the tank body 900, a plurality of nozzles facing the outer wall of the tank body 900 are arranged on the water distribution pipe, the water distribution pipe is connected with a plurality of water pipes, one ends of the water pipes are communicated with an external water source, a water pump is arranged on the water pipes, the water pump is electrically connected with a controller, and when a fire disaster occurs, the controller controls the water pump to work.

Referring to fig. 1 and 2, the floating body 600 is connected with the foam delivery pipe 500 through the telescopic mechanism 800, when the floating disc 100 is submerged and the floating platform 200 is separated from the floating disc 100, the length of the telescopic mechanism 800 becomes larger when the floating body 600 falls on the liquid surface, and the distance between the floating body 600 and the foam delivery pipe 500 is increased, so that the foam generator 400, the foam dispenser 410 and the foam delivery pipe 500 are far away from the liquid surface and are more stable, even the floating platform 200 still floats on the liquid surface, the foam generator 400, the foam dispenser 410 and the foam delivery pipe 500 are prevented from falling into the liquid surface, and normal operation of the foam generator 400, the foam dispenser 410 and the foam delivery pipe 500 is ensured.

Another liquid level sensor is arranged on the side face of the floating body 600, the other liquid level sensor is electrically connected with the controller, when the floating body 600 falls on the liquid level, the other liquid level sensor detects a liquid level signal and transmits the signal to the controller, and when the liquid level reaches a set value, the controller can judge that the floating disc 100 has a sinking disc accident.

The telescopic mechanism 800 is a cylinder, the cylinder body and the piston rod of the cylinder are respectively connected with the floating body 600 and the foam conveying pipe 500, and a solid fuel and a gas generator are arranged in the piston of the cylinder and are electrically connected with the controller. The solid fuel is sodium azide. The liquid level sensor detects a liquid level signal and transmits the signal to the controller, when the controller judges that the floating disc 100 sinks, the controller sends an instruction signal to the gas generator, the gas generator generates ignition action according to the signal instruction, the ignited solid fuel generates gas, and the gas charges the piston of the cylinder, so that the total degree of the cylinder is prolonged.

Of course, the telescoping mechanism 800 may be replaced with a connecting rod or post. The floating body 600 may be a square body shaped case or a cylindrical barrel. The lower end of the floating body 600 is provided with supporting feet, which enable the body of the floating body 600 to be separated from the floating disc 100, so that the body of the floating body 600 is prevented from affecting the flow of water on the floating disc 100.

Referring to fig. 2, the connection mechanism includes a latch 120 horizontally disposed on the floating plate 100, and a pin hole into which the latch 120 is inserted is provided on the floating platform 200 at a region corresponding to the latch 120. After the bolts 120 are inserted into the pin holes, the floating platform 200 and the floating disc 100 can be connected together, so that the floating platform 200 is prevented from being separated from the floating disc 100 accidentally. Of course, normally, under the weight of the floating platform 200, the mixing liquid pipe 300, the foam generator 400, the foam dispenser 410 and the foam delivery pipe 500, the floating platform 200 is positioned to press against the floating disc 100.

The connection mechanism further comprises a first connecting rod 130, a float 140 and a second connecting rod 150, wherein two ends of the first connecting rod 130 are respectively hinged with the floating disc 100 and the float 140, and two ends of the second connecting rod 150 are respectively connected with the bolt 120 and the float 140. When the float pan 100 is submerged in the liquid level of the tank 900, oil enters the upper surface of the float pan 100 and the float 140 will adhere to the oil. Because the floating disc 100 at one end of the first link 130 is hinged, the floating disc 100 is sunk, the float 140 is lifted up relative to the floating disc 100, and the float 140 pulls the latch 120 through the second link 150, so that the latch 120 is separated from the pin hole, and the floating platform 200 is separated from the floating disc 100.

It should be understood that the connection mechanism corresponds to a crank sliding mechanism, the first link 130 is a crank, the float 140 serves as a power source to drive the first link 130 to swing on the floating disc 100, and the latch 120 corresponds to a slider.

In another embodiment, the connection mechanism includes a latch 120, a float 140, a pulley and a pull rope, the pulley is disposed on the floating disc 100, one end of the pull rope bypasses the pulley and is connected with the latch 120, the other end of the pull rope is connected with the float 140, when the float 140 rises relative to the floating disc 100, the latch 120 is pulled by the float 140 through the pull rope, so that the latch 120 is separated from the pin hole, and the floating platform 200 is separated from the floating disc 100.

Of course, the connection mechanism may be a connection assembly, the connection assembly has a certain structural strength, when the floating disc 100 sinks, the floating body 600 supports the floating platform 200 and the structural components arranged on the floating platform 200, at this time, the floating platform 200 is subjected to two forces, namely, the forces acting on the connection assembly, and when the forces are excessive, the connection assembly is disconnected, so that the floating platform 200 can be separated from the floating disc 100. Therefore, the connection assembly is reasonably selected, and the connection assembly has proper structural strength and can be broken when the floating disc 100 sinks. The connection assembly may be a connection plate and a bolt.

It will be appreciated that the foam dispenser 410 or the foam delivery tube 500 is provided with a linear driving mechanism, which is abutted to the latch 120 through a link mechanism, and the linear driving mechanism can drive the latch 120 to withdraw from the pin hole through the link mechanism. The linear driving mechanism is electrically connected with the controller, and when a sinking disc accident occurs, the controller sends an instruction to the linear driving mechanism, and the linear driving mechanism drives the bolt 120 to move so that the bolt 120 is separated from the pin hole. The linear drive mechanism may be an electric push rod or a rack and pinion mechanism.

It should be understood that the floating platform 200 and the floating disc 100 are respectively provided with a first inverted U-shaped block and a second inverted U-shaped block, the floating platform 200 and the first U-shaped block enclose a limiting hole for limiting the latch 120, and the first U-shaped block also plays a guiding role, so that the latch 120 can only move in the axial direction of the limiting hole, and the floating disc 100 and the second U-shaped block enclose a pin hole. The first U-shaped block and the second U-shaped block are simple in structure and convenient to process.

The stepped through hole 110 comprises a first section, a second section and a third section which are arranged from top to bottom, the second section is in an inverted truncated cone shape, the second section can perform the functions of rectifying and aligning the floating platform 200, and the first section and the third section are columnar and can prevent the floating platform 200 from moving in the horizontal direction on the floating disc 100.

An elastic sealing layer is arranged between the floating disc 100 and the floating platform 200, and seals a gap between the floating disc 100 and the floating platform 200, so that oil gas is prevented from escaping through the gap between the floating disc 100 and the floating platform 200.

The water accumulation groove 220 has an inverted truncated cone-shaped space or a cylindrical space. The mounting hole 210 is a stepped hole with a large upper part and a small lower part. Fasteners penetrate through the first flange 321, the outer edge 710 and the second flange 331 at the same time and are in threaded connection with hole shoulders of the stepped holes, thereby fixing the upper pipe 320, the outer edge 710 and the lower pipe 330 on the floating platform 200. The fastener is a bolt or a screw.

Because the sidewall of the can 900 is deformed when a fire occurs, the foam delivery pipe 500 may be caught on the sidewall of the can 900 when the sidewall of the can 900 is concavely deformed too much. The foam transportation pipe 500 comprises a first section 530 and a second section 540, wherein one end of the first section 530 is provided with a first switch valve 510 and is connected with the foam distributor 410, one end of the second section 540 is slidably inserted into the other end of the first section 530, when the side wall of the tank body 900 abuts against the second section 540, the second section 540 is retracted into the first section 530, the whole length of the foam transportation pipe 500 is reduced, the foam transportation pipe 500 is prevented from being opened on the side wall of the tank body 900, and the floating body 600, the foam transportation pipe 500, the foam distributor 410, the foam generator 400, part of the structure of the mixed liquid pipe 300 and the floating platform 200 can be lifted along with the liquid level.

The application also discloses an oil tank, which comprises a tank body 900 and the fire protection system, wherein the floating disc 100 is arranged in the tank body 900, and the floating disc 100 can float on the liquid surface of the tank body 900.

The outer edge of the floating disc 100 is provided with a sealing ring, and the sealing ring is abutted with the inner wall of the tank body 900. The sealing ring comprises a bag body which is annular and is connected with the outer edge of the floating disc 100, water or other liquid is filled in the bag body, and the bag body is abutted with the inner wall of the tank body 900. The capsule body is made of elastic materials, such as rubber, so that the capsule body can deform.

It will be appreciated that the tank 900 is provided with conventional mechanisms such as an anti-rotation mechanism, an oil inlet and outlet pipe, a disc ladder, a floating ladder, a drain pipe, and the like, and the floating disc 100 is also provided with conventional mechanisms such as a manhole, a breather valve, a pillar, an annular cofferdam, and the like.

The oil tank has all the advantageous effects brought by the fire fighting system of the above embodiment, and the description thereof will not be repeated here.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Of course, the present application is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present application, and these equivalent modifications or substitutions are included in the scope of the present application as defined in the appended claims.

Claims (11)

1. A fire protection system, comprising:

the floating disc is arranged in the tank body, a stepped through hole is formed in the central axis of the floating disc, and the stepped through hole is large and small in the upper part and small in the lower part;

the floating platform penetrates through the stepped through hole and is detachably connected with the floating platform through a plurality of connecting mechanisms, when the floating platform is immersed into the liquid level of the tank body, the floating platform is separated from the floating platform, and a mounting hole is formed in the central axis of the floating platform;

the mixed liquid pipe is connected with the floating platform and penetrates through the mounting hole, the upper end of the mixed liquid pipe is positioned above the floating platform and provided with a foam generator, the output end of the foam generator is provided with a foam distributor, and the lower end of the mixed liquid pipe is connected with a mixed liquid supply device;

the foam conveying pipes are radially arranged on the foam distributor, all the foam conveying pipes are positioned above the floating platform and the floating disc, and all the foam conveying pipes are provided with a plurality of foam injection branch pipes;

the floating bodies are connected with the foam conveying pipes and can prop against the upper surface of the floating disc;

the device comprises a controller, an alarm device and a plurality of smoke sensors, wherein the smoke sensors are arranged above the floating disc and are opposite to the foam conveying pipe, and the controller is electrically connected with the alarm device and the smoke sensors.

2. The fire protection system of claim 1, wherein: all foam conveyer pipes all are equipped with first ooff valve in being close to foam distributor's region, first ooff valve is normally open's electron valve, the controller with first ooff valve electric connection.

3. The fire protection system of claim 2, wherein: the foam conveying pipe comprises a first section and a second section, wherein one end of the first section is provided with a first switch valve and is connected with the foam distributor, and one end of the second section is slidably inserted into the other end of the first section.

4. The fire protection system of claim 1, wherein: the upper surface of floating disc uses the central axis place's of floating disc point as the center and downwards bends, the upper surface of floating platform is less than or the parallel and level is located the minimum of floating disc upper surface, the axis department of floating platform has seted up the ponding groove, the mounting hole is seted up in the axis department of ponding groove's tank bottom, the mixed liquid pipe is equipped with a plurality of aqueous vapor switching holes in the region that corresponds the ponding groove, be equipped with flexible snap ring in the mixed liquid pipe, just the one end of snap ring with the inner wall sealing connection of mixed liquid pipe, the aqueous vapor switching hole is located the snap ring top and can be gone into the mixed liquid pipe drainage, when the mixed liquid pipe drainage, the other end of snap ring is down warp and gradually shrink under the hydraulic pressure and form the funnel-shaped structure, when mixed liquid supply device goes into the mixed liquid pipe supply mixed liquid, the other end of snap ring can be down warp and gradually shrink under the effect of mixed liquid and form the funnel-shaped structure, aqueous vapor switching hole orientation the snap ring with the inner wall sealing connection of mixed liquid pipe, the snap ring forms with the negative pressure between the mixed liquid switching hole and the mixed liquid pipe the negative pressure district.

5. The fire protection system of claim 4, wherein: the mixed liquid pipe comprises an upper pipe and a lower pipe which are connected, the water-gas switching hole is formed in the lower end of the upper pipe, one end of the elastic baffle ring is provided with an outer edge, and the outer edge is arranged between the upper pipe and the lower pipe to limit and fix the elastic baffle ring.

6. The fire protection system of claim 1, wherein: the lower extreme of mixed liquid pipe is connected with the hose, the hose is located in the jar body, the lower extreme of hose is connected with the tee bend, three-way first end be used for with jar body coupling and stretch into in the jar body, the hose with three-way first end intercommunication, be connected with second ooff valve and third ooff valve on three-way second end and the third end respectively, the third ooff valve is connected mixed liquid supply device.

7. The fire protection system of claim 1, wherein: the connecting mechanism comprises a bolt horizontally arranged on the floating disc, and a pin hole for the bolt to be inserted is formed in the floating platform in a region corresponding to the bolt.

8. The fire protection system of claim 7, wherein: the connecting mechanism further comprises a first connecting rod, a floater and a second connecting rod, wherein two ends of the first connecting rod are respectively hinged with the floating disc and the floater, and two ends of the second connecting rod are respectively connected with the bolt and the floater.

9. The fire protection system of claim 7 or 8, wherein: the floating platform and the floating disc are respectively provided with a first U-shaped block and a second U-shaped block which are inverted, the floating platform and the first U-shaped block enclose a limiting hole for limiting the bolt, and the floating disc and the second U-shaped block enclose a pin hole.

10. The fire protection system of claim 1, wherein: the stepped through hole comprises a first section, a second section and a third section which are arranged from top to bottom, the second section is in an inverted round table shape, and the first section and the third section are all in column shapes.

11. Oil tank, its characterized in that: comprising a tank and a fire protection system according to any one of claims 1 to 10, the floating disc being arranged in the tank, the floating disc being floatable on the liquid surface of the tank.