Automatic fire extinguishing device for flammable liquid storage tank

Abstract

The utility model discloses an automatic fire extinguishing device for flammable liquid storage tank, including storage tank, be provided with the floating type fire extinguishing device in the storage tank, the floating type fire extinguishing device includes annular injector, bamboo joint telescopic ware, float box and locking device, the bottom of storage tank is connected through vertical bamboo joint telescopic ware float box's bottom, and annular injector sets up at the upside of float box, under the initial state, locking device locks float box in the bottom in the storage tank, and bamboo joint telescopic ware is in the contraction state, through float box with liquid level elevation, bamboo joint telescopic ware synchronous telescopic with float box, ensure that annular injector always close liquid surface, thereby make the fire extinguishing agent that sprays to the storage tank in the dead angleless cover entire liquid surface, through infrared temperature detection device and locking bolt drive arrangement and solenoid valve's linkage, realize quick unlocking and fire extinguishing agent's injection, through physical buoyancy drive annular injection device rises, greatly avoid annular injector under high temperature environment damage.

Description

Technical Field

[0001] This utility model belongs to the technical field of safety equipment for industrial storage tanks, and more specifically, it is an automatic fire extinguishing device for storage tanks of flammable liquids. Background Technology

[0002] Fire protection devices for storage tanks containing flammable liquids such as petroleum and ethanol have always been indispensable in industrial production processes. Traditional fire protection devices mostly rely on external sprinkler systems or fixed fire extinguishing devices on the tank top. External systems require manual firefighting, which can easily cause casualties. When the liquid level in the tank drops, the fixed fire extinguishing device cannot adapt to the liquid level change, and the extinguishing agent cannot cover the liquid surface, resulting in low fire extinguishing efficiency. Moreover, when the storage tank catches fire, the fixed fire extinguishing device is scorched by the high temperature of the outer flame on the liquid surface, which can easily cause the fire extinguisher to fail in the fire environment. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an automatic fire extinguishing device for flammable liquid storage tanks. Through buoyancy drive and mechanical linkage design, it reduces the risk of explosion in fire and can greatly avoid damage to the annular sprayer in high temperature environment. Under the premise of ensuring that the fire extinguisher can work safely in the event of a fire, it can complete adaptive fire extinguishing for different liquid levels.

[0004] Technical Solution: To achieve the above objectives, this utility model provides an automatic fire extinguishing device for flammable liquid storage tanks, comprising a storage tank, wherein a floating fire extinguishing device is installed inside the storage tank. The floating fire extinguishing device includes an annular sprayer, a bamboo-joint telescopic device, a float box, and a locking device. The bottom of the storage tank is connected to the bottom of the float box via a vertical bamboo-joint telescopic device. The annular sprayer is located on the upper side of the float box. In the initial state, the locking device locks the float box to the bottom inside the storage tank, and the bamboo-joint telescopic device is in a retracted state.

[0005] Furthermore, with the locking device unlocked, the float rises to the surface of the liquid in the storage tank, the annular sprayer sprays fire extinguishing foam obliquely downwards onto the surface of the liquid in the storage tank above the surface of the liquid in the storage tank, and the vertical bamboo joint telescopic device is in the extended state.

[0006] Furthermore, the locking device includes a telescopic latch and a locking groove. The bottom of the float box is provided with a lifting plate. The bottom of the storage tank is provided with a placement groove corresponding to the lifting plate. A sliding groove is provided on the arc-shaped groove wall of the placement groove. The latch is sealed and slidably fitted in the sliding groove and slides relative to the sliding groove through a latch driving device. The locking groove is provided on the circumferential surface of the lifting plate corresponding to the latch.

[0007] Furthermore, the annular injector includes a diverter, an annular tube, and several flow tubes. The input end of the diverter is coaxially connected to the float box via a connecting pipe. The annular tube is coaxially arranged around the diverter. Several flow tubes are arranged in a circular array on the circumference of the diverter, and the diverter is connected to the annular tube via several flow tubes. Several nozzles are arranged in a circular array on the annular tube corresponding to each flow tube.

[0008] Furthermore, a foam fire extinguishing device is installed inside the float box, and a solenoid valve is installed at one end of the connecting pipe inside the float box. When the solenoid valve is in the open or closed state, the foam fire extinguishing device is in communication with each nozzle.

[0009] Furthermore, it also includes an infrared temperature detection device, which is installed at intervals around the storage tank via a bracket. The infrared temperature detector is electrically connected to the solenoid valve and the latch drive device.

[0010] Beneficial effects: This utility model provides an automatic fire extinguishing device for flammable liquid storage tanks. The float rises and falls with the liquid level, and the bamboo-joint telescopic device extends and retracts synchronously with the float, ensuring the annular sprayer remains close to the liquid surface. This allows the extinguishing agent sprayed into the storage tank to cover the entire liquid surface without any blind spots. The device uses an infrared temperature detection device to monitor the tank temperature in real time, and the linkage between the infrared temperature detection device, the locking tongue drive device, and the solenoid valve enables rapid unlocking and extinguishing agent spraying. The annular sprayer is driven upwards by physical buoyancy, reducing the use of electronic components and the risk of explosion during a fire. Furthermore, it greatly reduces the risk of damage to the annular sprayer in high-temperature environments. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the automatic cooling and fire prevention device of this utility model in a high-position state.

[0012] Figure 2 This is a schematic diagram of the automatic cooling and fire prevention device of this utility model in a low-position state.

[0013] Figure 3 This is a cross-sectional view of an automatic fire extinguishing device for a flammable liquid storage tank according to the present invention;

[0014] Figure 4 This is a sectional view along line A;

[0015] Figure 5 This is a magnified view of part B. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figures 1-3 As shown, an automatic fire extinguishing device for a flammable liquid storage tank includes a storage tank 1, which is fixed to the ground. The storage tank 1 is filled with flammable liquids such as fuel oil and ethanol. A floating fire extinguishing device 26 is installed inside the storage tank 1. The floating fire extinguishing device 26 includes a ring-shaped sprayer 3, a bamboo-joint expansion joint 6, a float box 5, and a locking device 25. Two bamboo-joint expansion joints 6 are symmetrically arranged on the bottom 17 of the storage tank 1 about the axis of the storage tank 1. The bottom 17 of the storage tank 1 is connected by two vertical... The bamboo-joint telescopic device 6 is connected to the bottom of the float box 5. The bottom of the float box 5 is provided with a lifting plate 4. The bottom 17 of the storage tank 1 is provided with a circular placement groove 10 corresponding to the lifting plate 4. The locking device 25 is provided in the placement groove 10. The annular injector 3 is coaxially arranged on the upper side of the float box 5. An airbag 8 is provided on the side of the lifting plate 4 away from the annular injector 3. In the initial state, the locking device 25 locks the float box 5 to the bottom of the placement groove 10 in the storage tank 1, and the bamboo-joint telescopic device 6 is in the retracted state. With the locking device 25 unlocked, the airbag 8 and the float 5 can drive the lifting plate 4 and the annular sprayer 3 to move upward along the axis of the storage tank 1 until the float 5 floats to the surface of the liquid in the storage tank 1. The annular sprayer 3 is above the surface of the liquid in the storage tank 1 and sprays fire extinguishing foam obliquely downward toward the surface of the liquid in the storage tank 1. The two vertical bamboo joint expansion joints 6 are in the extended state, and the two bamboo joint expansion joints 6 guide the upward movement of the float 5.

[0018] Both the float box 5 and the lifting plate 4 are made of materials with a density close to or lower than that of the solution in the storage tank 1. The float box 5 is equipped with a foam fire extinguishing device. When the storage tank 1 catches fire, the foam fire extinguishing device in the float box 5 generates rapidly expanding cooling foam. The cooling foam generated in the float box 5 is sprayed into the storage tank 1 through the annular sprayer 3, thereby cooling the solution in the storage tank 1.

[0019] like Figures 4-5As shown, the annular sprayer 3 includes a diverter 18, an annular pipe 19, and several flow pipes 20. The diverter 18 is connected to the float box 5 via a connecting pipe 22 on the side near the placement tank 10. A normally closed solenoid valve 23 is provided at one end of the connecting pipe 22 inside the float box 5. The annular pipe 19 is coaxially arranged around the diverter 18. Several flow pipes 20 are arranged in a circular array on the circumference of the diverter 18, and the diverter 18 is connected to the annular pipe 19 via several flow pipes 20. Several nozzles 21 are arranged in a circular array on the annular pipe 19 corresponding to each flow pipe 20. When the storage tank 1 catches fire, the solenoid valve 23 is in the open / closed state, and the foam extinguishing device is in communication with each nozzle 21. The cooling foam generated in the float 5 enters the diversion chamber of the distributor 18 through the connecting pipe 22, and flows evenly into the annular pipe 19 through several flow pipes 20. Finally, it is sprayed into the storage tank 1 from the nozzles 21, thereby uniformly cooling the solution in the storage tank 1. The cooling foam sprayed into the storage tank 1 will gather on the surface of the solution in the storage tank 1 and form an isolation film, thereby preventing the flammable liquid in the storage tank 1 from directly contacting the air, thus accelerating the fire extinguishing speed. In this process, the impact force of the cooling foam sprayed from the nozzles 21 on the solution in the storage tank 1 can drive the solution in the storage tank 1 to form a swirling flow, so that the cooling foam can cool the solution in the storage tank 1 more evenly.

[0020] The locking device 25 includes a telescopic locking tongue 7 and a locking groove 12. A sliding groove 11 is provided on the arc-shaped groove wall of the placement groove 10. The locking tongue 7 is sealed and slidably fitted in the sliding groove 11 and slides relative to the sliding groove 11 through the locking tongue driving device. The depth of the sliding groove 11 is not less than the length of the locking tongue 7. The locking groove 12 is opened on the circumference of the lifting plate 4 corresponding to the locking tongue 7. In the initial state, one end of the locking tongue 7 extends out of the sliding groove 11 and is limited and fitted in the locking groove 12, thereby preventing the airbag 8 and the float 5 from driving the lifting plate 4 and the annular injector 3 to move upward along the axis of the storage tank 1 under normal conditions. Thus, when the storage tank 1 catches fire, the lifting plate 4, the annular injector 3, and the float 5 described in this solution can cool and extinguish the solution in the storage tank 1 at the first time, while not directly contacting the open flame at the highest temperature on the surface of the solution in the storage tank 1 at the first time, thereby avoiding damage to the annular injector 3 and the float 5 by the extremely high temperature of the outer flame of the open flame.

[0021] The locking tongue drive device includes a lead screw 14 and a lead screw drive motor 15. The locking tongue 7 has a threaded hole 13. A lead screw 14, threaded into the threaded hole 13, is disposed in the sliding groove 11. A through lead screw hole 17 is provided at the bottom of the sliding groove 11 corresponding to the lead screw 14. The lead screw 14 is coaxially rotatably fitted in the lead screw through hole 17, and one end of the lead screw 14 near the locking tongue 7 protrudes from the sliding groove 11. The lead screw drive motor 15 is disposed on the circumferential surface of the storage tank 1, and the drive shaft of the lead screw drive motor 15 is coaxially aligned with the lead screw through hole 17. One end of the screw 14 is threaded into the threaded hole 13, and the other end is coaxially connected to the drive shaft 16 of the screw drive motor 15 through the hole 17 via a lead screw. When the storage tank 1 catches fire, the screw drive motor 15 starts and drives the lead screw 14 to rotate rapidly in the forward direction, thereby causing the locking tongue 7 to move in the direction close to the sliding groove 11 until the end of the locking tongue 7 located in the sliding groove 11 makes contact with the bottom of the sliding groove 11. At this time, the end of the locking tongue 7 away from the sliding groove 11 separates from the locking groove 12 on the lifting plate 4, thereby causing the airbag 8 and the float 5 to drive the lifting plate 4 and the annular injector 3 to move upward along the axis of the storage tank 1.

[0022] like Figure 1 As shown, it also includes an infrared temperature detection device 2. The infrared temperature detector 2 is installed at intervals around the storage tank 1 via a bracket 9. The infrared temperature detector 2 monitors the temperature change of the storage tank 1 in real time, and the infrared temperature detector 2 is electrically connected to the lead screw drive motor 15 and the solenoid valve 23 in the latch drive device. When the infrared temperature detector 2 detects that the temperature of the storage tank 1 is abnormal or at the ignition temperature, the infrared temperature detector 2 transmits the data to the control system. The control system controls the lead screw drive motor 15 to start and drive the lead screw 14 to rotate rapidly in the forward direction, and the control system controls the solenoid valve 23 to be in the open / closed state.

[0023] The working principle of the automatic fire extinguishing device for flammable liquid storage tanks described in this solution is as follows: When the infrared temperature detector 2 detects an abnormal temperature or that the storage tank 1 is at an ignition temperature, the infrared temperature detector 2 transmits the data to the control system. The control system controls the lead screw drive motor 15 to start and drive the lead screw 14 to rotate rapidly in the forward direction. At the same time, the control system controls the solenoid valve 23 to be in the open / closed state. The end of the lead screw 14 away from the locking lead screw drive motor 15 is threaded into the threaded hole 13, thereby causing the locking tongue 7 to move along the direction close to the sliding groove 11 until the locking tongue 7 is located at one end of the sliding groove 11 and engages with the sliding groove 11. When the bottom of the tank is in contact with the limit switch, the end of the locking tongue 7 away from the sliding groove 11 is separated from the locking groove 12 on the lifting plate 4, thereby causing the airbag 8 and the float box 5 to drive the lifting plate 4 and the annular jet 3 to move upward along the axis of the storage tank 1. The cooling foam generated in the float box 5 enters the diversion chamber of the diverter 18 through the connecting pipe 22, and flows evenly into the annular pipe 19 through several flow pipes 20. Finally, it is sprayed into the storage tank 1 from the nozzles 21, thereby uniformly cooling the solution in the storage tank 1. The cooling foam sprayed into the storage tank 1 will gather on the surface of the solution in the storage tank 1 and form an isolation film.

[0024] The above are the preferred embodiments described in this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An automatic fire extinguishing device for flammable liquid storage tanks, characterized in that: The system includes a storage tank (1), which is equipped with a floating fire extinguishing device (26). The floating fire extinguishing device (26) includes an annular sprayer (3), a bamboo joint telescopic device (6), a float box (5), and a locking device (25). The bottom (17) of the storage tank (1) is connected to the bottom of the float box (5) through the vertical bamboo joint telescopic device (6). The annular sprayer (3) is located on the upper side of the float box (5). In the initial state, the locking device (25) locks the float box (5) to the bottom of the storage tank (1), and the bamboo joint telescopic device (6) is in a retracted state.

2. An automatic fire extinguishing device for flammable liquid storage tanks according to claim 1, characterized in that: With the locking device (25) unlocked, the float (5) floats to the surface of the liquid in the storage tank (1), the annular sprayer (3) sprays fire extinguishing foam at an angle downwards onto the surface of the liquid in the storage tank (1) above the surface of the liquid, and the vertical bamboo joint telescopic device (6) is in the extended state.

3. An automatic fire extinguishing device for flammable liquid storage tanks according to claim 1, characterized in that: The locking device (25) includes a telescopic locking tongue (7) and a locking groove (12). The bottom of the float (5) is provided with a lifting plate (4). The bottom (17) of the storage tank (1) is provided with a placement groove (10) corresponding to the lifting plate (4). A sliding groove (11) is provided on the arc-shaped groove wall of the placement groove (10). The locking tongue (7) is sealed and slidably fitted in the sliding groove (11) and slides relative to the sliding groove (11) through the locking tongue driving device. The locking groove (12) is provided on the circumferential surface of the lifting plate (4) corresponding to the locking tongue (7).

4. An automatic fire extinguishing device for a flammable liquid storage tank according to claim 3, characterized in that: The annular injector (3) includes a diverter (18), an annular pipe (19), and several flow pipes (20). The input end of the diverter (18) is coaxially connected to the float (5) through a connecting pipe (22). The annular pipe (19) is coaxially arranged around the diverter (18). Several flow pipes (20) are arranged in a circular array on the circumferential surface of the diverter (18). The diverter (18) is connected to the annular pipe (19) through several flow pipes (20). Several nozzles (21) are arranged in a circular array on the annular pipe (19) corresponding to each flow pipe (20).

5. An automatic fire extinguishing device for a flammable liquid storage tank according to claim 4, characterized in that: The floating box (5) is equipped with a foam fire extinguishing device. The connecting pipe (22) is equipped with a solenoid valve (23) at one end of the floating box (5). When the solenoid valve (23) is in the open or closed state, the foam fire extinguishing device is connected to each nozzle (21).

6. An automatic fire extinguishing device for a flammable liquid storage tank according to claim 1, characterized in that: It also includes an infrared temperature detector (2), which is installed around the storage tank (1) at intervals by a bracket (9). The infrared temperature detector (2) is electrically connected to the solenoid valve (23) and the infrared temperature detector (2) is electrically connected to the latch drive device.

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