An automatic fire extinguishing device for an electrochemical energy storage cabin

Abstract

The present invention discloses an automatic fire extinguishing device for an electrochemical energy storage cabin, and the present invention relates to the technical field of fire extinguishing equipment for energy storage cabins. The automatic fire extinguishing device for the electrochemical energy storage cabin includes an energy storage cabin body and a mounting plate fixedly connected to the cavity wall of the energy storage cabin body. On the side of the mounting plate away from the cavity wall of the energy storage cabin body, an expandable fire extinguishing mechanism is fixedly connected. The expandable fire extinguishing mechanism includes a mounting box fixedly connected to the outside of the mounting plate. The upper end of a hose is communicated with a jet pipe, the lower end of the hose is fixedly connected to the upper end surface of a bottom plate, and a plurality of nozzle assemblies are equidistantly embedded on the outside of the hose. An isolation component is jointly installed inside the bottom plate and the mounting box. Through the expansion of the hose, the present invention arranges a plurality of nozzle assemblies in sequence along the longitudinal direction, so that heptafluoropropane can be sprayed into the energy storage cabin from different heights, ensuring that heptafluoropropane can quickly fill the energy storage cabin in a short time during a fire, and improving the fire extinguishing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing equipment for energy storage cabins, and specifically to an automatic fire extinguishing device for an electrochemical energy storage cabin. Background Art

[0002] Energy storage, as the name implies, is to first store excess energy and then call it when needed. Under the "dual carbon" goal, the supporting construction of a new type of power system facility has become a new trend in the current domestic industry development. With the application of new energy, the construction of energy storage power stations and related energy storage equipment has increased significantly. Among them, the electrochemical energy storage system using lithium batteries is the most widely used. In the electrochemical energy storage cabin, a battery cluster composed of several lithium batteries is installed. Lithium batteries have a high energy density and a long service life, but they are prone to battery thermal runaway during the cyclic charging process, which will cause serious harm to the entire energy storage cabin and energy storage power station. Thermal runaway refers to the overheating, ignition, and explosion phenomena caused by the heat release chain reaction of a single battery, resulting in a sharp change in the self-temperature rise rate of the battery. Therefore, fire extinguishing equipment is needed to ensure safety and extinguish the fire source in time when the energy storage cabin catches fire.

[0003] Currently, most of the fire extinguishing methods use the total flooding method of heptafluoropropane. However, due to the fact that the nozzles are fixed at a single position point in this fire extinguishing method, the spraying height is single. During the period from when the fire breaks out in the energy storage cabin and the nozzles start to spray heptafluoropropane until the fire source is completely extinguished, it takes a certain amount of time for heptafluoropropane to completely fill the energy storage cabin, and it is very easy to miss the opportunity to control the fire situation in the early stage, and the fire extinguishing effect is average. Summary of the Invention

[0004] The present invention provides an automatic fire extinguishing device for an electrochemical energy storage cabin, which solves the technical problems that the spraying height of the traditional energy storage cabin fire extinguishing device is single, and the fire extinguishing gas cannot quickly fill the inside of the energy storage cabin when a fire breaks out, resulting in an average fire extinguishing effect.

[0005] An automatic fire extinguishing device for an electrochemical energy storage cabin provided by the present invention includes an energy storage cabin body and a mounting plate fixedly connected to the cavity wall of the energy storage cabin body. On the side of the mounting plate away from the cavity wall of the energy storage cabin body, an expandable fire extinguishing mechanism is fixedly connected. The expandable fire extinguishing mechanism includes a mounting box fixedly connected to the outside of the mounting plate, a plurality of gas spraying pipes equidistantly embedded in the side wall of the mounting box away from the mounting plate, a bottom plate arranged at the bottom of the mounting box through a triggering unit, a plurality of rotating shafts fixedly connected to the inside of the mounting box through wheel frames and corresponding to the gas spraying pipes, a winding wheel rotatably connected to the outside of the rotating shafts, and a hose wound around the outside of the winding wheel. The upper end of the hose is communicated with the gas spraying pipe, the lower end of the hose is fixedly connected to the upper end surface of the bottom plate, and a plurality of nozzle assemblies are equidistantly embedded in the outside of the hose. A separation component is jointly installed inside the bottom plate and the mounting box.

[0006] In a possible implementation, the nozzle assembly includes a circular tube fitted outside the hose, a top column slidably connected to the outside of the circular tube, and a return spring fixedly connected between the outer wall of the top column and the inside of the circular tube. A ring-shaped valve plate is fixedly connected to the inner cavity of the circular tube near its end side, and a disc-shaped plug is fixedly connected to the end of the top column for cooperating with the ring-shaped valve plate.

[0007] In a possible implementation, the isolation assembly includes a strip-shaped storage box fixedly connected to the lower opening of the cavity wall of the installation box, a flame-retardant cloth folded and placed inside the strip-shaped storage box, and a blocking block fixedly connected to the upper end surface of the bottom plate and located directly below the strip-shaped storage box, and the lower part of the flame-retardant cloth is fixedly connected to the upper end surface of the blocking block.

[0008] In a possible implementation, the triggering unit includes a baffle slidably connected to the lower end surface of the installation box for blocking and limiting the bottom plate, a tube fixed to the side of the installation box by a fixing rod, and a piston slidably connected to the inside of the tube. A connecting rod is fixedly connected between the side end surface of the piston and the upper end surface of the baffle.

[0009] In a possible implementation, a number of L-shaped rods corresponding to the air injection pipes are equidistantly arranged on one side of the installation box away from the installation plate. The end of the vertical section of the L-shaped rod is rotatably connected to a fan blade through a rotating shaft, and a number of flow deflecting pieces are fixedly connected equidistantly in the circumferential direction outside the fan blade.

[0010] In a possible implementation, an elastic piece is fixedly connected to the side of the vertical section of the L-shaped rod away from the installation box, and a dialing block for dialing the elastic piece is fixedly connected to the end of the rotating shaft.

[0011] In a possible implementation, a counterweight bar is fixedly connected to the lower end surface of the bottom plate.

[0012] In a possible implementation, an air inlet pipe is communicated with the upper part of the air injection pipe.

[0013] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0014] In the present invention, the nozzle assembly is longitudinally arranged by quickly unfolding the hose wound around the reel, so that when a fire breaks out in the energy storage cabin, heptafluoropropane can be sprayed into the energy storage cabin from different heights, enabling heptafluoropropane to quickly fill the inside of the energy storage cabin in a short time and improving the fire extinguishing effect.

[0015] In the present invention, when the bottom plate drops, the flame-retardant cloth is driven to unfold to isolate the battery cluster on fire inside the energy storage cabin, preventing the spread of the fire source and facilitating the fire extinguishing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0017] Figure 1 Schematic structural diagram of the automatic fire extinguishing device for the electrochemical energy storage cabin provided by the present invention.

[0018] Figure 2 Schematic cross-sectional structural diagram of the installation box from a side view provided by the present invention.

[0019] Figure 3 Provided by the present invention Figure 2 Enlarged schematic diagram of part A structure in

[0020] Figure 4 Schematic cross-sectional structural diagram of the deployed fire extinguishing mechanism provided by the present invention.

[0021] Figure 5 Provided by the present invention Figure 4 Enlarged schematic diagram of part B structure in

[0022] Figure 6 Schematic cross-sectional structural diagram of the nozzle assembly provided by the present invention.

[0023] Among them, the above-mentioned drawings include the following reference numerals: 1, energy storage cabin body; 2, mounting plate; 3, deployed fire extinguishing mechanism; 31, installation box; 32, air injection pipe; 33, trigger unit; 331, baffle; 332, tube; 333, piston; 334, connecting rod; 34, bottom plate; 35, reel; 36, hose; 37, nozzle assembly; 371, round tube; 372, top column; 373, return spring; 374, annular valve piece; 375, disc-shaped plug; 38, isolation component; 381, strip-shaped storage box; 382, flame retardant cloth; 4, fan blade; 5, flow deflector; 6, elastic sheet; 7, dialing block; 8, air inlet pipe. Detailed implementation manners

[0024] To make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the following will give a detailed description of the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0025] Please refer to Figure 1 、Figure 2 and Figure 4 , the present invention provides a technical solution: an automatic fire extinguishing device for an electrochemical energy storage cabin, comprising an energy storage cabin body 1 and a mounting plate 2 fixedly connected to the inner wall of the energy storage cabin body 1. On the side of the mounting plate 2 away from the inner wall of the energy storage cabin body 1, an unfolding fire extinguishing mechanism 3 is fixedly connected. The unfolding fire extinguishing mechanism 3 includes a mounting box 31 fixedly connected to the outside of the mounting plate 2, a plurality of air injection pipes 32 equidistantly embedded in the side wall of the mounting box 31 away from the mounting plate 2, a bottom plate 34 arranged at the bottom of the mounting box 31 through a trigger unit 33. A counterweight bar is fixedly connected to the lower end face of the bottom plate 34 to increase the weight of the bottom plate 34, so that the bottom plate 34 can descend smoothly and vertically when falling, avoiding shaking and offset during the descending process. A plurality of rotating shafts fixedly connected to the inside of the mounting box 31 through wheel brackets and corresponding to the air injection pipes 32, a reel 35 rotatably connected to the outside of the rotating shaft, and a hose 36 wound around the outside of the reel 35. The upper end of the hose 36 is communicated with the air injection pipe 32, the lower end of the hose 36 is fixedly connected to the upper end face of the bottom plate 34, and a plurality of nozzle assemblies 37 equidistantly embedded in the outside of the hose 36. An isolation component 38 is jointly installed inside the bottom plate 34 and the mounting box 31. The upper part of the air injection pipe 32 is communicated with an air inlet pipe 8.

[0026] Please refer to Figure 6 , the nozzle assembly 37 includes a circular tube 371 embedded in the outside of the hose 36, a top column 372 slidably connected to the outside of the circular tube 371, and a return spring 373 fixedly connected between the outer wall of the top column 372 and the inside of the circular tube 371. A ring-shaped valve plate 374 is fixedly connected to the inner cavity of the circular tube 371 near its end. A disk-shaped blocking piece 375 for cooperating with the ring-shaped valve plate 374 is fixedly connected to the end of the top column 372. When the hose 36 is wound around the outside of the reel 35, the top column 372 abuts against the outer wall of the adjacent hose 36. At this time, the top column 372 retracts into the circular tube 371, and the disk-shaped blocking piece 375 coincides with the ring-shaped valve plate 374, so that the circular tube 371 is in a closed state, and the circular tube 371 is not communicated with the hose 36, which can prevent the leakage of heptafluoropropane from the nozzle assembly 37 when the hose 36 is not unfolded.

[0027] Please refer to Figure 3 , the trigger unit 33 includes a baffle 331 slidably connected to the lower end face of the mounting box 31 for blocking and limiting the bottom plate 34, a tube 332 fixedly connected to the side of the mounting box 31 through a fixing rod, and a piston 333 slidably connected to the inside of the tube 332. A connecting rod 334 is fixedly connected between the side end face of the piston 333 and the upper end face of the baffle 331.

[0028] The air inlet pipe 8 is connected to an external container storing HFC-227ea. When a fire occurs inside the energy storage cabin, the high temperature inside the cabin is transmitted to the trigger unit 33 to make it operate. The tube 332 in the trigger unit 33 is heated. Under the action of thermal expansion and contraction, the gas inside the tube 332 expands and pushes the piston 333 to move. The piston 333 then drives the baffle 331 to move through the connecting rod 334 until the baffle 331 is completely moved out from the bottom of the bottom plate 34. The bottom plate 34 loses the limit of the baffle 331 and falls rapidly under the action of gravity, thereby driving the hose 36 wrapped around the outside of the reel 35 to be released. The top column 372 in the released hose 36 moves under the push of the return spring 373, driving the disc-shaped plug 375 and the annular valve plate 374 to stagger. The circular tube 371 and the hose 36 are connected until the bottom plate 34 drops to the bottom of the energy storage compartment and the hose 36 is fully unfolded. At the same time, the external pump body starts to run to pass HFC-227ea into the air inlet pipe 8, and then into the jet pipe 32. Part of the HFC-227ea is sprayed from the jet pipe 32 to the upper part of the inner cavity of the energy storage compartment, and the other part of the HFC-227ea enters the hose 36 and is then sprayed from the circular tube 371 to the energy storage compartment. The circular tubes 371 arranged longitudinally at different heights in the hose 36 are used to spray HFC-227ea into the energy storage compartment from different heights. Therefore, when a fire occurs in the energy storage compartment, the HFC-227ea can be quickly filled in the energy storage compartment in a short time, and the fire point can be isolated from oxygen at the first time to complete the fire extinguishing process, thereby improving the fire extinguishing effect.

[0029] See also Figure 2 The isolation assembly 38 includes a strip storage box 381 fixedly connected to the lower opening of the cavity wall of the installation box 31, a flame-retardant cloth 382 folded and placed inside the strip storage box 381, and a blocking block fixedly connected to the upper end surface of the bottom plate 34 and located directly below the strip storage box 381, and the lower part of the flame-retardant cloth 382 is fixedly connected to the upper end surface of the blocking block. The bottom plate 34 will also drive the blocking block to drop synchronously during the process of losing the limit of the trigger unit 33. The blocking block then drives the flame-retardant cloth 382 to unfold from the strip storage box 381. After the bottom plate 34 drops to the bottom of the energy storage cabin, the flame-retardant cloth 382 is fully unfolded to separate the battery and the energy storage cabin wall panel, thereby avoiding the heat source inside the energy storage cabin after a fire from radiating outward, which is convenient for fire extinguishing.

[0030] See also Figure 2 and Figure 5 In this embodiment, a plurality of L-shaped rods corresponding to the air injection pipes 32 are equidistantly arranged on one side of the installation box 31 away from the installation plate 2, the end of the vertical section of the L-shaped rod is rotatably connected to the fan blade 4 through a rotating shaft, a plurality of diverter plates 5 are fixedly connected to the outer circumference of the fan blade 4 at equal intervals, an elastic plate 6 is fixedly connected to one side of the vertical section of the L-shaped rod away from the installation box 31, and a diverter block 7 for diverting the elastic plate 6 is fixedly connected to the end of the rotating shaft.

[0031] When HFC-227ea is sprayed out from the jet pipe 32, it will also drive the fan blades 4 to rotate. The rotation of the fan blades 4 will disperse the sprayed HFC-227ea. The rotation of the fan blades 4 will drive the diverter plate 5 to rotate, and the dispersed HFC-227ea will be thrown out through the diverter plate 5. At the same time, the rotating fan blades 4 will also drive the diverter block 7 to rotate through the rotating shaft. The rotating diverter block 7 will intermittently drive the elastic plate 6 to swing back and forth, thereby driving the HFC-227ea sprayed out from the jet pipe 32 to swing, so that the HFC-227ea can quickly spread and fill the energy storage compartment, further enhancing the fire extinguishing effect.

[0032] During operation, when a fire occurs in the energy storage cabin, the temperature in the energy storage cabin continues to rise, thereby triggering the trigger unit 33 to operate. Then the bottom plate 34 detaches from the installation box 31 and falls, thereby driving the hose 36 to unfold. Through the unfolded hose 36, a number of nozzle assemblies 37 longitudinally arranged in the energy storage cabin can spray heptafluoropropane from different heights into the energy storage cabin, so that heptafluoropropane can be quickly filled in the energy storage cabin in a short time after the fire occurs, and the fire source can be quickly extinguished, thereby improving the fire extinguishing effect. When the bottom plate 34 falls, it will also drive the flame retardant cloth 382 to unfold, isolating the fire point inside the energy storage cabin, thereby facilitating the fire extinguishing work.

[0033] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An automatic fire extinguishing device for an electrochemical energy storage cabin, comprising an energy storage cabin body (1) and a mounting plate (2) fixedly connected to the cavity wall of the energy storage cabin body (1), characterized in that: On one side of the mounting plate (2) away from the cavity wall of the energy storage tank body (1), an expandable fire extinguishing mechanism (3) is fixedly connected; The expandable fire extinguishing mechanism (3) includes: A mounting box (31) fixedly connected to the outside of the mounting plate (2), a plurality of air injection pipes (32) equidistantly embedded in the side wall of the mounting box (31) away from the mounting plate (2), a bottom plate (34) arranged at the bottom of the mounting box (31) through a triggering unit (33), a plurality of rotating shafts fixedly connected to the inside of the mounting box (31) through wheel frames and corresponding to the air injection pipes (32), a winding wheel (35) rotatably connected to the outside of the rotating shaft, and a hose (36) wound around the outside of the winding wheel (35); The upper end of the hose (36) is communicated with the air injection pipe (32), and the lower end of the hose (36) is fixedly connected to the upper end surface of the bottom plate (34); A plurality of spray head assemblies (37) equidistantly embedded in the outside of the hose (36); An isolation component (38) is jointly installed inside the bottom plate (34) and the mounting box (31); The spray head assembly (37) includes a circular tube (371) embedded in the outside of the hose (36), a top column (372) slidably connected to the outside of the circular tube (371), and a return spring (373) fixedly connected between the outer wall of the top column (372) and the inside of the circular tube (371). A ring-shaped valve piece (374) is fixedly connected to the inner cavity of the circular tube (371) near its end side, and a disc-shaped blocking piece (375) for cooperating with the ring-shaped valve piece (374) is fixedly connected to the end of the top column (372).

2. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 1, characterized in that: The isolation component (38) includes a strip-shaped storage box (381) fixedly connected to the lower opening of the cavity wall of the mounting box (31), a flame-retardant cloth (382) folded and placed inside the strip-shaped storage box (381), and a blocking block fixedly connected to the upper end surface of the bottom plate (34) and directly below the strip-shaped storage box (381), and the lower part of the flame-retardant cloth (382) is fixedly connected to the upper end surface of the blocking block.

3. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 1, wherein: The triggering unit (33) includes a baffle (331) slidably connected to the lower end surface of the mounting box (31) for blocking and limiting the bottom plate (34), a tube barrel (332) fixedly connected to the side of the mounting box (31) through a fixed rod, and a piston (333) slidably connected to the inside of the tube barrel (332). A connecting rod (334) is fixedly connected between the side end surface of the piston (333) and the upper end surface of the baffle (331).

4. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 1, wherein: On one side of the mounting box (31) away from the mounting plate (2), a plurality of L-shaped rods corresponding to the air injection pipes (32) are equidistantly arranged. The end of the vertical section of the L-shaped rod is rotatably connected to a fan blade (4) through a rotating shaft, and a plurality of flow deflecting pieces (5) are equidistantly fixedly connected to the outer circumference of the fan blade (4).

5. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 4, wherein: An elastic piece (6) is fixedly connected to the side of the vertical section of the L-shaped rod away from the mounting box (31), and a dialing block (7) for dialing the elastic piece (6) is fixedly connected to the end of the rotating shaft.

6. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 1, characterized in that: A counterweight bar is fixedly connected to the lower end surface of the bottom plate (34).

7. The automatic fire extinguishing device for an electrochemical energy storage cabin according to claim 1, wherein: An air inlet pipe (8) is communicated with the upper part of the air injection pipe (32).

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