Water-spraying device for fire suppression of electric vehicles which penetrates bottom of battery case

Abstract

The present invention relates to a water-spraying device for the fire suppression of electric vehicles, which penetrates the bottoms of battery cases and, to a water-spraying device for the fire suppression of electric vehicles, which penetrates the bottoms of battery cases, in which the water-spraying device enters a space between the ground and the body of an electric vehicle, penetrates the bottom of a battery case of the electric vehicle to supply firefighting water therethrough, and thus can suppress fire.

Description

Battery case bottom penetration sprinkler for electric vehicle fire suppression

[0001] The present invention relates to a battery case lower penetration water sprinkler for extinguishing a fire in an electric vehicle, and relates to a battery case lower penetration water sprinkler for extinguishing a fire in an electric vehicle, which enters the space between the ground and the body of the electric vehicle, penetrates the lower part of the battery case of the electric vehicle, supplies firefighting water, and extinguishes a fire.

[0002] Recently, due to global oil price hikes and CO2 regulations, fuel efficiency of automobiles has been improved and eco-friendly hybrid and electric vehicles are being developed.

[0003] Electric vehicles are largely comprised of an electric motor, a battery, and a power conversion device (inverter). In particular, the high-voltage battery pack used in electric vehicles is designed to supply the necessary power by repeatedly charging and discharging while the vehicle is in motion.

[0004] These high-voltage battery packs are designed to prevent fires in advance by blowing the fuse or shutting off the relay connected to the inverter when an internal short circuit or overcurrent occurs.

[0005] Meanwhile, if a fire breaks out inside a high-voltage battery pack due to a malfunction in the wires or battery management system (BMS) that make up the battery system, such as an external shock or internal short circuit, the battery will burn completely. That is, the battery cell's negative active material supplies substances like carbon, while the battery's positive active material supplies oxygen. Therefore, once a fire breaks out, the battery will burn completely.

[0006] Because of this, there was a problem that if a fire spread to the electric vehicle itself, including the high-voltage battery pack, the electric vehicle could be completely destroyed.

[0007] Korean Patent Publication No. 10-2012-0136830 and Korean Patent Publication No. 10-2018-0113795 disclose technologies for extinguishing fires in high-voltage battery packs.

[0008] However, the above technologies have the problem of increasing the size of the battery and increasing manufacturing costs as separate fire extinguishing equipment is installed inside the electric vehicle or battery.

[0009] In addition, the batteries of electric vehicles are packaged in small battery cells as modules, and multiple modules are packaged as packs and managed by a battery management system. Since they are isolated from the outside world by cases and cages at each stage of packaging, it is difficult to access the battery, which is the source of ignition, in a short period of time.

[0010] Accordingly, conventionally, fires are extinguished by raising the side of the electric vehicle to continuously waterproof the battery case loaded underneath, by piercing the battery case with a piercing nozzle to inject fire water, by mechanically or by using compressed gas to pierce the battery case to inject water or chemicals, or by submerging the electric vehicle in a large water tank.

[0011] However, the method of extinguishing a fire by raising the side of an electric vehicle to waterproof it or submerging the electric vehicle in a large tank required large equipment to lift the electric vehicle or one side, making it difficult to quickly extinguish the fire.

[0012] In order to solve the above-mentioned problem, the applicant has developed a device (Korean Patent Publication No. 10-2609595) that penetrates the battery case of an electric vehicle using a drill for drilling and then sprays water.

[0013] The applicant has continuously researched and developed a device that sprays water by penetrating the bottom of a battery case, and has developed a penetrating water spray device that is easier to penetrate the bottom of a battery case, can supply a large amount of water in a shorter period of time, and has a simpler structure, and has filed a follow-up application.

[0014] The present invention was created to solve the above problems, and provides a battery case lower penetration water sprinkler device for extinguishing electric vehicle fires, which is capable of easily puncturing the lower surface of an electric vehicle battery case by entering the space between the body of an electric vehicle and the ground where a fire has occurred and supplying a relatively large amount of firefighting water in a shorter period of time, thereby enabling rapid fire extinguishment.

[0015] In order to solve the above problems, the present invention provides a fire suppression device for an electric vehicle battery case, which includes a support frame including a base plate and an elevation plate that can be raised and lowered above the base plate; a perforation spray unit that is mounted on the elevation plate and is raised to contact a battery case of an electric vehicle and perforates the battery case while discharging fire water into the battery case; and an elevation control unit that controls the elevation of the elevation plate or controls the position of the support frame and the perforation spray unit above the battery case; wherein the perforation spray unit is mounted on a lower surface of the elevation plate so as to close a through hole formed in the elevation plate from below, and has a receiving space open in the direction of the fire water passage hole, a fire hose is connected, and a fire hose connection port that is formed to communicate with the receiving space; It is preferable to provide a perforation shaft which is rotatable and is connected to a drive shaft of a drive motor, and has a lower portion that is received by the fire water inflow chamber, extends upward through the lift plate, and has a hollow portion formed vertically and longitudinally on the inside so that the fire water introduced into the receiving space is sent upwardly; a hole cutter which has a lower portion mounted on the upper portion of the perforation shaft, has a discharge port formed vertically and penetrating through the inside communicating with the hollow portion, and has a plurality of cutting blades arranged around the discharge port on the upper portion, and has a plurality of auxiliary cutting grooves formed spirally extending in the direction of rotation while being introduced from an outer circumferential surface protruding upward with respect to the perforation shaft.

[0016] The hole cutter is detachably inserted and coupled to the upper portion of the perforation shaft and includes a shaft coupling portion having a first through-hole portion of the discharge port formed through a diameter larger than the hollow, and a perforation portion having an outer diameter larger than the shaft coupling portion, in which the cutting blade and the auxiliary cutting groove are formed, and a second through-hole portion of the discharge port formed through a diameter larger than the first through-hole portion is formed, and it is preferable that the upper portion of the second through-hole portion, in which the cutting blade is formed around the circumference, is formed to have an inner diameter that becomes narrower as it goes upward.

[0017] The above auxiliary cutting groove is preferably formed so that the depth of insertion decreases toward one side of the width facing the direction in which the perforation shaft rotates, and is positioned adjacent to the upper end of the cutting blade so that the width of the other side of the width becomes narrower toward the top.

[0018] The above auxiliary cutting groove may be formed by a spirally extended inlet surface with a constant width and positioned to be introduced from the outer surface of the hole cutter toward the center, a first side extending along the other side of the width of the inlet surface but being perpendicular to the inlet surface, and a second side extending along one side of the width of the inlet surface but forming an obtuse angle with the inlet surface and introduced with a shorter length than the first side.

[0019] The battery case lower penetration sprinkler device for suppressing fire in an electric vehicle of the present invention further comprises a reducer having a gear connected to a drive shaft of the drive motor and mounted on the lifting plate so as to cover the fire water passage hole from above; the perforation shaft penetrates the reducer in the vertical direction so as to be coupled with the gear and rotate together, and comprises a shaft body having a lower portion inserted into the receiving space spaced upwardly from a bottom surface of the receiving space and having a diameter smaller than the receiving space, and having the hollow formed on the inside; and a cutter engaging portion protruding upward from the reducer, having a lower portion of the hole cutter inserted and fixed therein, and having a engaging groove formed in communication with the upper end of the hollow; and it is preferable that the hollow be formed such that the diameter of the lower portion increases as it goes downward.

[0020] The battery case lower penetration sprinkler device for extinguishing fires in electric vehicles of the present invention enters the space between the body of the electric vehicle and the ground, perforates the lower surface of the battery case, and injects firefighting water, thereby enabling rapid fire extinguishment without changing the position of the electric vehicle.

[0021] In addition, the battery case lower penetration water sprinkler device for suppressing electric vehicle fire of the present invention can raise the perforation water sprinkler unit located at the lower part of the battery case by a simple operation of rotating the handle of the lifting operation unit at a distance from the electric vehicle, thereby perforating the battery case and injecting fire water, thereby improving safety and usability efficiency.

[0022] In addition, the battery case lower penetration water sprinkler device for suppressing electric vehicle fires of the present invention has a structure in which a perforation tool is rotatably mounted on a reduction gear connected to a driving motor, and the lower part of the perforation tool enters a fire water inlet chamber mounted on the lower part of the elevator plate to receive fire water, so that it has the advantage of being able to supply fire water by perforating the battery case with a simpler structure.

[0023] The battery case lower penetration sprinkler device for suppressing fires in electric vehicles of the present invention has a receiving space of a fire water inflow chamber having a larger diameter than a perforation shaft and a bottom surface spaced apart from the lower end of the perforation shaft, so that a large amount of fire water can be easily supplied, and a cylindrical hole cutter can be used to perforate the battery case of the electric vehicle to discharge a large amount of fire water, thereby further increasing fire suppression efficiency.

[0024] FIG. 1 is a partial perspective view showing a state in which a battery case lower penetration sprinkler device for suppressing electric vehicle fire according to one embodiment of the present invention enters the lower side of the electric vehicle.

[0025] Figure 2 is a partial perspective view of the battery case lower penetration sprinkler device for electric vehicle fire suppression of Figure 1.

[0026] Figure 3 is a partially enlarged perspective view showing the perforation cutter of the lower penetration sprinkler device for electric vehicle fire suppression of Figure 1 in an elevated state.

[0027] Figure 4 is a side view of the battery case lower penetration sprinkler device for electric vehicle fire suppression of Figure 1.

[0028] Figure 5 is a side cross-sectional view of the battery case lower penetration sprinkler device for electric vehicle fire suppression of Figure 1.

[0029] Figure 6 is a cross-sectional side view of the perforation cutter of Figure 3,

[0030] Figure 7 is a plan view of the perforation cutter of Figure 3,

[0031] FIG. 8 is a partial cross-sectional view of a battery case lower penetration sprinkler for electric vehicle fire suppression according to another embodiment of the present invention.

[0032] FIG. 9 is a partial cross-sectional view of a battery case lower penetration water spray device for suppressing electric vehicle fire according to another embodiment of the present invention.

[0033] Hereinafter, with reference to the attached drawings, a battery case lower penetration sprinkler device for suppressing electric vehicle fire according to the present invention will be described in detail.

[0034] Figures 1 to 7 illustrate a battery case lower penetration water spray device (10) for suppressing electric vehicle fires according to one embodiment of the present invention.

[0035] According to one embodiment of the present invention, a battery case lower penetration sprinkler device (10) for suppressing fire in an electric vehicle comprises: a perforation sprinkler unit (31) that is elevable between the ground and the battery case (3) of the electric vehicle (1) and is elevated to contact the electric vehicle (1) and discharges fire water while perforating the battery case (3); a support frame (11) that supports the elevation of the perforation sprinkler unit (31); and an elevation control unit (71) that controls the elevation of the perforation sprinkler unit (31) or controls the positions of the support frame (11) and the perforation sprinkler unit (31) on the lower side of the battery case (3).

[0036] The support frame (11) comprises a base plate (12) in the shape of a square plate and in contact with the ground; a plurality of lifting guide bars (15) that are fixed at the lower portions at each corner of the base plate (12) and extend upward in parallel; a lifting plate (18) that is in the shape of a square plate corresponding to the base plate (12) and has a plurality of lifting guide bars (15) that penetrate the corners and a perforation spray unit (31) mounted at the center and can be raised and lowered in parallel with the base plate (12); an upper plate (21) that is supported at the upper end of the lifting guide bar (15) in the shape of a square plate and has a cutter penetration hole (22) formed at the center; a pair of lifting pieces (24) that extend in parallel from the lower surface of the lifting plate (18) toward the base plate (12) with the perforation spray unit (31) interposed therebetween; A pair of first rotation support pieces (27) are provided, which extend upwards in parallel from the base plate (12) at an alternating position with the lift pieces (24), but whose upper parts face the lift pieces (24) laterally.

[0037] The base plate (12) is bent so that the side entering the lower part of the electric vehicle is inclined upward.

[0038] The elevator plate (18) has a guide bar penetration hole (not shown) through which an elevator guide bar (15) passes on the corner side, and a fire extinguisher passage hole (19) is formed through the center side in the length and width directions.

[0039] On the upper surface of the top plate (21), a number of tapered spikes (23) are formed with a diameter that becomes narrower as they go upward.

[0040] The perforation sprinkler unit (31) includes a fire water inflow chamber (32) mounted on the lower surface of the lift plate (18) to close the fire water passage hole (19) from below; a reducer (37) coupled with a driving motor (64) and mounted on the upper surface of the lift plate (18) to cover the fire water passage hole (19) from above; A drilling tool (42) is provided, which includes a drilling shaft (43) which is penetrated into a reducer (37), has a lower portion that penetrates an elevator plate (18) and is received into a fire water inflow chamber (32), and an upper portion that protrudes with respect to the reducer and is rotatable by the driving force of a driving motor (64), and has a hollow portion (45) formed therein so that fire water introduced into the fire water inflow chamber (32) is discharged upward, and a hole cutter (51) which is mounted on the upper portion of the drilling shaft (43) and has a discharge port (52) formed therein that is connected to the hollow portion (45) so that when the elevator plate (18) is raised, the battery case (3) is perforated and the fire water introduced into the hollow portion (45) is discharged into the battery case (3) of an electric vehicle (1).

[0041] The fire water inflow chamber (32) is mounted on the center side of the lower surface of the elevator plate (18) so as to close the fire water passage hole (19) from below. The fire water inflow chamber (32) has a receiving space (34) open toward the fire water passage hole (19), and a fire hose (7) is connected thereto, and a fire hose connection port (35) communicating with the receiving space (34) is formed.

[0042] The fire hose (7) may be connected to a fire hydrant (8) as shown in Fig. 1, or may be connected to a fire truck (9) to supply fire water into the fire water inlet chamber (32).

[0043] The reducer (37) is equipped with a gear unit (38) including a worm gear (39) coupled with a drive shaft (65) of a drive motor (64) and a worm wheel (40) meshed with the worm gear, and is mounted on the upper surface center side of the elevator plate (18) so as to cover the fire water passage hole from above.

[0044] The driving motor (64) is a DC motor, and the power required for driving is supplied from the motor driving battery (5).

[0045] The perforation shaft (43) is installed through the worm wheel (40) and rotates together with the reducer (37) and passes through it in the vertical direction. The hollow portion (45) of the perforation shaft (43) is penetrated vertically along the length direction on the inside so that the fire water introduced into the receiving space (34) is forced upward. In addition, the hollow portion (45) is formed so that the diameter increases toward the bottom, that is, the side located within the fire water inflow chamber (32). This is to facilitate the fire water supplied to the fire water inflow chamber (32) to flow smoothly into the hollow portion (45).

[0046] A perforation shaft (43) has a shaft body (44) that is inserted into a receiving space (34), has a lower portion spaced upward from the bottom surface of the receiving space (34) and has a diameter smaller than the receiving space (34), has a hollow portion (45) formed on the inside, and is penetrated and mounted on a worm wheel (40); and a cutter coupling portion (47) that protrudes upward from a reducer (37), has a lower portion of a hole cutter (51) inserted and fixed, and has a coupling groove (48) formed that is connected to the upper end of the hollow portion (45).

[0047] In addition, the perforation shaft (43) is provided with a coupling rib (46) that protrudes from the upper outer surface of the shaft body (44) and extends parallel to the longitudinal direction so as to rotate together with the worm wheel (40) and is fitted into a mounting groove (41) formed on the inside of the worm wheel (40).

[0048] The hole cutter (51) is mounted at the bottom on the top of the perforation shaft (43), and a discharge port (52) communicating with a hollow (45) is formed vertically and downwardly, and a plurality of cutting blades (57) are arranged around the discharge port (52) at the top, and a plurality of auxiliary cutting grooves (58) are formed that are introduced from an outer surface protruding upward from the perforation shaft (43) and spirally extend in the direction of rotation.

[0049] A hole cutter (51) is detachably inserted and connected to the upper portion of a perforation shaft (43) and has a shaft coupling portion (55) in which a first through-hole (53) of a discharge port (52) is formed with a diameter larger than the upper diameter of the hollow (45); and a perforation portion (56) in which a cutting blade (57) and an auxiliary cutting groove (58) are formed and a second through-hole (54) of a discharge port (52) is formed with a diameter larger than the first through-hole (53).

[0050] It is preferable that the upper part of the second penetration portion (54) formed with a plurality of cutting blades (57) around the periphery be formed so that the inner diameter becomes narrower as it goes upwards so that the power to discharge fire water temporarily increases.

[0051] It is preferable that the perforation (56) be formed with an outer circumferential diameter in the range of 25 to 50 mm.

[0052] As an example, the upper side formed with a constant diameter of the hollow (45) is formed with a diameter of 10 mm, the first through-hole (53) is formed with a diameter of 12 mm, and the second through-hole (54) is formed with a diameter of 32 mm, but the upper side, where a plurality of cutting blades (57) are formed around the circumference, can be formed to narrow to a diameter of 25 mm to the end.

[0053] The auxiliary cutting groove (58) is formed so that the depth of insertion decreases toward one side of the width facing the direction in which the perforation shaft (43) rotates, and is positioned adjacent to the upper end of the cutting blade (57) so that the width of the other side of the width becomes narrower toward the top.

[0054] The auxiliary cutting groove (58) is formed by a spirally extended inlet surface (59) that is positioned to be introduced from the outer surface of the perforation (56) toward the center with a constant width; a first side surface (60) that extends along the other side of the width of the inlet surface (59) but is perpendicular to the inlet surface (59); and a second side surface (61) that extends along one side of the width of the inlet surface (59) but forms an obtuse angle with the inlet surface (59) and is introduced with a shorter length than the first side surface (60).

[0055] The lifting operation unit (71) has one longitudinal end rotatably connected to a pair of lifting members (22), and the other longitudinal end spaced apart from the longitudinal end by a predetermined distance is rotatably connected to a rotation support member (27), and is formed to protrude from the support frame (11) located below the battery case (3) of the electric vehicle (1) and to be rotated by a user by being gripped.

[0056] Specifically, the lifting operation unit (71) has a pair of first rotation bars (72) whose longitudinal ends are rotatably connected to the lifting member (24) and whose longitudinal ends are rotatably connected to the first rotation support member (27) at a predetermined distance from the longitudinal end, a first connecting bar (75) connecting the other ends of the pair of first rotation bars (72), and a handle portion (78) that extends from the first connecting bar (75) in a direction away from the fire extinguisher receiving chamber (32) and protrudes laterally or forwards and backwards with respect to the electric vehicle (1) when the hole cutter (51) is positioned below the battery case (3) of the electric vehicle (1).

[0057] The first rotation bar (72) is formed by penetrating one side in the longitudinal direction and extending in the longitudinal direction so that a first shaft (25) protruding from the lower end of the lift member (24) extends through it and a first shaft coupling hole (73) in the form of a long hole extending in the longitudinal direction is formed, and a second shaft coupling hole (29) is formed by penetrating in a circular shape at a predetermined distance from the first shaft coupling hole (73) on the other side in the longitudinal direction so that a second shaft (28) penetratingly mounted on the first rotation support member (27) passes through it.

[0058] Meanwhile, the battery case lower penetration water sprinkler (10) for suppressing electric vehicle fire according to one embodiment of the present invention may be equipped with an operating unit that is fixed to the handle portion (78) side or provided separately for driving the driving motor (64), although not shown.

[0059] The above-mentioned operating unit can control the power supply required to drive the driving motor (64) or the rotation speed of the driving shaft (65) of the driving motor (64). Although not shown, a remote control may be applied to the operating unit, and in this case, a receiving device that receives the operating command signal of the operating unit and transmits it to the driving motor (64) is mounted on one side of the driving motor (64).

[0060] The operation of a battery case lower penetration sprinkler device (10) for suppressing electric vehicle fires according to one embodiment of the present invention having a structure as described above is described.

[0061] A user who wishes to extinguish a fire in an electric vehicle (1) positions a support frame (11) equipped with a perforation sprinkler unit (31) into the space between the body (2) of the electric vehicle (1) where the fire broke out and the ground through the broken handle (78).

[0062] Then, as the driving motor (64) is driven and the drilling tool (42) rotates together with the worm wheel (40), the fire water supplied from the fire hose (7) flows into the fire water inlet chamber (38) and is discharged through the hollow (45) of the drilling shaft (43) to the discharge port (52) of the hole cutter (51), the handle portion (78) of the lifting operation portion (71) is lowered to raise the lifting plate (18).

[0063] The hole cutter (51) that rotates while rising together with the elevator plate (18) perforates the lower part of the body (2) and battery case (3) of the electric vehicle (1), and the fire extinguishing fluid discharged from the discharge port (52) is injected into the battery case (3).

[0064] According to one embodiment of the present invention, a battery case lower penetration sprinkler (10) for extinguishing a fire in an electric vehicle enters the space between the body (2) of an electric vehicle (1) and the ground, perforates the lower surface of the battery case (3), and injects firefighting water, so that fire extinguishment can be performed quickly without changing the position of the electric vehicle.

[0065] In addition, the battery case lower penetration sprinkler device (10) for suppressing fire in an electric vehicle according to one embodiment of the present invention can raise the perforation sprinkler unit (31) located below the battery case (3) by a simple operation of rotating the handle part (74) of the lifting operation part (71) at a distance from the electric vehicle (1), thereby perforating the battery case (3) and injecting fire water, thereby improving safety and usability.

[0066] According to one embodiment of the present invention, a battery case lower penetration water sprinkler device (10) for suppressing fire in an electric vehicle has a structure in which a perforation tool is rotatably mounted on a reduction gear connected to a driving motor, and the lower part of the perforation tool is immersed in a fire water inlet chamber (32) mounted on the lower part of an elevator plate to receive fire water, thereby having the advantage of being able to supply fire water by perforating the battery case (3) with a simpler structure.

[0067] According to one embodiment of the present invention, a fire suppression device (10) for suppressing a fire in an electric vehicle battery case has a receiving space (34) of a fire water inflow chamber (32) having a larger diameter than a perforation shaft (43) and a bottom surface spaced apart from the lower end of the perforation shaft (43), so that a large amount of fire water can be easily supplied, and a large amount of fire water can be discharged by perforating the battery case (3) of the electric vehicle with a cylindrical hole cutter, thereby further increasing the fire suppression efficiency.

[0068] FIG. 8 illustrates a battery case lower penetration sprinkler (110) for suppressing electric vehicle fires according to another embodiment of the present invention. Components having the same function as those in the previously illustrated drawings are indicated by the same reference numerals.

[0069] A battery case lower penetration sprinkler device (110) for suppressing fires in an electric vehicle according to another embodiment of the present invention has the same structure as the battery case lower penetration sprinkler device (10) for suppressing fires in an electric vehicle according to one embodiment of the present invention, except that a hollow inflow guide ring (49) is further provided in the perforation shaft (43) and a hollow inflow guide protrusion (36) is further provided in the fire water inflow chamber (32).

[0070] The perforation shaft (43) further includes a hollow inlet induction ring (49) that protrudes in a ring shape on the lower outer surface of the shaft body (44) accommodated in the accommodation space (34) and whose outer diameter decreases as it goes toward the bottom.

[0071] The hollow inflow induction ring (49) guides the fire water flowing into the upper side of the fire hose connection port (35) downward into the receiving space (34) and rotates it in the circumferential direction along the inner surface of the receiving space (34) formed in a circular shape.

[0072] A fire water inflow chamber (32) is provided with a chamber body (33) that is connected to a lifting plate (18) and has a receiving space (34) and a fire hose connection port (35) formed therein; and a hollow inflow induction projection (36) that protrudes upward from the center of the bottom surface forming the receiving space (34) of the chamber body (33) with an outer diameter smaller than a hollow (45), but whose upper end is positioned lower than a perforation shaft (43) and whose outer diameter decreases as it goes upward.

[0073] The hollow inflow induction projection (36) is guided to move to the lower part of the receiving space (34) by the hollow inflow induction ring (49) and induces the fire water rotating in the circumferential direction to flow toward the hollow (45) side.

[0074] FIG. 9 illustrates a battery case lower penetration sprinkler (210) for suppressing electric vehicle fires according to another embodiment of the present invention. Components having the same function as those in the previously illustrated drawings are indicated by the same reference numerals.

[0075] A battery case lower penetration sprinkler device (210) for suppressing fires in an electric vehicle according to another embodiment of the present invention has the same structure as a battery case lower penetration sprinkler device (10) for suppressing fires in an electric vehicle according to an embodiment of the present invention, except that it further includes a flow prevention unit (90) that can prevent flow when perforating the battery case (3) and spraying fire water by fixing the support frame (11) to the ground when the lifting operation unit (71) rotates so that the hole cutter (51) comes into contact with the battery case (3) of the electric vehicle (1).

[0076] The movement prevention unit (90) is a first movement prevention projection (91) that protrudes downward from the first connecting bar (75) located on the outside of the support frame (11) so that the hole cutter (51) comes into contact with the battery case (3) when the lifting operation unit (71) rotates, a pair of second rotation bars (93) each of which is rotatably mounted on one side of a pair of lifting pieces (24) and extends parallel to each other in a direction away from the lifting operation unit (71), a pair of second rotation support pieces (95) that protrude upward from the base plate (12) so that the opposite sides of the pair of first rotation support pieces (27) are positioned and are rotatably connected to each other at the other ends of the second rotation bars (93), and a second connecting bar (97) that connects each other end of the second rotation bars (93) so that the outer diameter is reduced downward. It has a second anti-flow projection (99) that protrudes and comes into contact with the ground when the elevator plate (18) rises.

[0077] It is preferable that the first flow-preventing protrusions (91) are provided in pairs and protrude downwardly and parallel from the first connecting bar (75), and it is preferable that the second flow-preventing protrusions (99) are provided in pairs and protrude downwardly and parallel from the second connecting bar (97), and are provided in pairs and protrude downwardly and parallel from the second connecting bar (97).

[0078] According to another embodiment of the present invention, a battery case lower penetration water spray device (210) for suppressing fire in an electric vehicle has an advantage in that when the lifting plate (12) is raised and the hole cutter (51) perforates the battery case (3) to spray fire water, the device can be stably fixed on the ground by the movement prevention unit (90).

Claims

1. A support frame including a base plate and a lifting plate that can be raised and lowered above the base plate; A perforation spray unit mounted on the above-mentioned board, which is raised to contact the battery case of the electric vehicle and perforates the battery case while discharging fire water into the battery case; It has an elevation control unit that controls the elevation of the elevation plate or controls the position of the support frame and the perforation sprinkler unit on the lower side of the battery case; The above perforation spray unit A fire water inflow chamber which is mounted on the lower surface of the above-mentioned elevator plate to close the fire water passage hole formed in the above-mentioned elevator plate from below and has a receiving space open in the direction of the fire water passage hole, to which a fire hose is connected, and a fire hose connection port which is formed to communicate with the receiving space; A perforation shaft having a lower portion that is received by the above fire water inflow chamber and extends upward through the above-mentioned elevator plate, and a hollow portion formed vertically along the length of the inner surface so that the fire water introduced into the above-mentioned receiving space is conveyed upward, and is rotatable by being connected to the drive shaft of the drive motor; A lower portion is mounted on the upper portion of the above-mentioned perforation shaft, and a discharge port communicating with the hollow is formed vertically and downwardly on the inside, and a plurality of cutting blades are arranged around the discharge port on the upper portion, and a hole cutter is provided with a plurality of auxiliary cutting grooves formed spirally in the rotational direction while being introduced from an outer circumference protruding upward with respect to the above-mentioned perforation shaft; A lower penetration sprinkler device for suppressing fire in an electric vehicle battery case, characterized in that 2. In the first paragraph, the hole cutter A shaft coupling portion that is detachably inserted into the upper portion of the perforation shaft and has a first through-hole portion of the discharge port formed with a diameter larger than the upper diameter of the hollow portion; It includes a perforation portion having an outer diameter larger than the shaft coupling portion, in which the cutting blade and the auxiliary cutting groove are formed, and a second perforation portion of the discharge port is formed with a diameter larger than the first perforation portion. The upper part of the second penetration portion formed around the cutting blade A fire suppression device for an electric vehicle battery case, characterized by a penetration-forming device with an inner diameter that becomes narrower as it goes upward.

3. In paragraph 1, the auxiliary cutting groove A fire suppression device for a battery case lower penetration sprinkler for an electric vehicle, characterized in that the depth of penetration is formed to decrease toward one side of the width facing the direction in which the perforation shaft rotates, and the other side of the width becomes narrower toward the top of the cutting blade.

4. In the third paragraph, the auxiliary cutting groove An extended inlet surface with a constant width and positioned so as to be introduced from the outer surface of the above hole cutter toward the center, A first side extending along the width of the above-mentioned inlet surface and being perpendicular to the above-mentioned inlet surface, A fire suppression battery case lower penetration sprinkler device for electric vehicles, characterized in that it is formed by a second side extending along one side of the width of the above inlet surface, forming an obtuse angle with the above inlet surface, and being inlet with a shorter length than the first side.

5. In paragraph 1, It further comprises a reducer having a built-in gear connected to the drive shaft of the above drive motor and mounted on the above lift plate to cover the above fire water passage hole from above; The above perforation shaft A shaft body having a lower portion inserted into the receiving space and spaced upwardly from the bottom surface of the receiving space and having a smaller diameter than the receiving space, and having a hollow formed on the inside thereof, and a cutter coupling portion protruding upwardly from the reducing gear, into which the lower portion of the hole cutter is inserted and fixed, and having a coupling groove formed in communication with the upper end of the hollow, is provided. The above hollow A fire suppression battery case lower penetration sprinkler device for electric vehicles, characterized in that the lower part is formed so that the diameter increases as it goes downward.

6. In the fifth paragraph, the perforation shaft A hollow inlet induction ring whose outer diameter decreases as it goes down from the outer surface of the lower part accommodated in the above accommodation space is further provided, The above fire water inlet chamber A fire suppression battery case lower penetration sprinkler device for electric vehicles, characterized in that it further comprises a hollow inflow induction protrusion that protrudes upward from the center of the bottom surface forming the above-mentioned receiving space with an outer diameter smaller than the above-mentioned hollow, but whose upper end is positioned lower than the above-mentioned perforation shaft and whose outer diameter decreases as it goes upward.

7. In the first paragraph, the support frame A pair of lifting members extending downwardly and parallel from the lower surface of the lifting plate with the fire extinguishing chamber in between, and a pair of first rotation support members extending upwardly and parallel to each other from the base plate at a position intersecting with the lifting members, with the upper portions facing the lifting members laterally, are further provided. The above elevator control unit A pair of first rotation bars, each longitudinal end of which is rotatably connected to a pair of lifting members and each longitudinal end of which is rotatably connected to the first rotation support member, a first connecting bar connecting the other ends of the pair of first rotation bars, and a handle portion extending away from the first connecting bar to the firefighter receiving chamber and capable of being gripped by a user, The above hole cutter is further provided with a movement prevention unit that can fix the support frame to the ground when the lifting operation unit rotates so that the above hole cutter comes into contact with the battery case. The above flow prevention unit A first flow prevention projection that protrudes downward from the first connecting bar so that the outer diameter is reduced and that contacts the ground when the lifting operation unit rotates so that the hole cutter contacts the battery case; A second rotation bar, each of which is rotatably mounted on one side of the pair of above-mentioned elevators and extending parallel to each other in a direction away from the above-mentioned elevator control unit, A pair of second pivot support pieces protruding upwardly and parallel from the base plate and positioned on opposite sides of the first pivot support pieces and each other side of the second pivot bar being rotatably connected, A fire suppression battery case lower penetration sprinkler device for electric vehicles, characterized in that a second flow prevention projection is provided that protrudes downward with a reduced outer diameter from a second connecting bar connecting each other end of the second rotating bar and comes into contact with the ground when the elevator plate is raised.

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