A power unit for an amphibious fire fighting vehicle

Abstract

The application belongs to the technical field of fire engines, and particularly relates to a power device of an amphibious fire engine, which comprises a fire engine body, a battery protection box fixedly arranged in the fire engine body, a battery pack arranged in the battery protection box, an air cooling mechanism, a water cooling mechanism and a sealing mechanism. The air cooling mechanism provides air cooling for the battery pack when the fire engine body runs on land. The water cooling mechanism provides water cooling for the battery pack when the fire engine body runs on water. The sealing mechanism is arranged in the battery protection box. When the water cooling mechanism works, the electric connection between the battery pack and the air cooling mechanism is disconnected under the action of the water cooling mechanism, the air cooling mechanism stops running, and the water cooling mechanism alone cools the battery pack. The application enables the battery pack to switch the cooling mode on water and disconnects the power support of the original cooling structure, thereby reducing the load of the battery.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fire fighting vehicles, and particularly relates to a power device of an amphibious fire fighting vehicle. BACKGROUND

[0002] A fire fighting vehicle is a tool for fire fighters to go out for rescue work, and the fire fighting task is not only carried out on land, but also occasionally carried out on water, so the fire fighters also need to ride a ship to the water surface to perform the task. However, the probability of water danger is small, and the fire fighters often use the ship less, which may cause delay of water rescue work and cause additional property loss or casualties. An amphibious fire fighting vehicle is born in time, and the power device is essential as a core component of the fire fighting vehicle. Now the vehicle is started by one key, so the battery is necessary for the power device to provide power support for operation, and therefore the battery is an essential part of the power device.

[0003] The existing battery in the power device of the amphibious fire fighting vehicle often maintains the installation mode of the fire fighting vehicle on land, and the heat dissipation structure needs the battery itself to provide power support. However, the resistance of the fire fighting vehicle is large when it works on water, the output power of the battery will be increased accordingly, and the battery needs to provide power output for the heat dissipation mechanism at this time, which will further increase the output power of the battery, and then the service life of the battery will be reduced. SUMMARY

[0004] The purpose of the application is to provide a power device of an amphibious fire fighting vehicle, which can switch the heat dissipation mode on the water surface, and also disconnect the power support of the original heat dissipation structure to reduce the load of the battery.

[0005] The technical scheme adopted by the application is as follows:

[0006] A power device of an amphibious fire fighting vehicle, comprising:

[0007] A fire fighting vehicle body, a battery protection box is fixedly installed inside the fire fighting vehicle body, a battery pack is installed inside the battery protection box, and the battery pack is used to provide power for starting and closing of the fire fighting vehicle body;

[0008] An air cooling mechanism is arranged inside the battery protection box, and the air cooling mechanism provides air cooling heat dissipation for the battery pack when the fire fighting vehicle body runs on land;

[0009] A water cooling mechanism is arranged inside the battery protection box, and the water cooling mechanism provides water cooling heat dissipation for the battery pack when the fire fighting vehicle body runs on water;

[0010] A sealing mechanism is arranged in the interior of the battery protection box, and the sealing mechanism is used for the battery protection box;

[0011] The sealing mechanism is used for blocking the connection between the battery protection box and the air cooling mechanism when the water cooling mechanism works, and the battery pack is isolated from the water flow at this time;

[0012] An electrically conductive assembly is arranged above the air cooling mechanism, and the electrically conductive assembly disconnects the electrical connection between the battery pack and the air cooling mechanism under the action of the water cooling mechanism, and the air cooling mechanism stops running.

[0013] A top cover plate is fixedly installed at the top end of the battery protection box, a plurality of power connection units are fixedly installed at the top end of the top cover plate, a drainage pipe for guiding air and water is fixedly connected to one side of the battery protection box, and the drainage pipe is fixedly embedded in the interior of the fire fighting truck body.

[0014] One end of the drainage pipe is fixedly connected with a gas collecting hopper, the gas collecting hopper is arranged in a funnel shape, and a filter screen for preventing dust and impurities in water is fixedly embedded in the interior of the gas collecting hopper.

[0015] The air cooling mechanism includes a heat dissipation fan, a support rod and an air outlet, the heat dissipation fan is electrically connected with the battery pack, the support rod is fixedly installed in the interior of the battery protection box, one end of the support rod is fixedly connected with one side of the heat dissipation fan, the air outlet is arranged on one side of the battery protection box, and the heat dissipation fan and the port of the drainage pipe are flush with each other.

[0016] The water cooling mechanism includes a water inlet pipe, the water inlet pipe is fixedly installed on the lower surface of the battery protection box, the bottom end of the water inlet pipe penetrates the fire fighting truck body, and the interior of the battery protection box is provided with a cavity in communication with the interior of the water inlet pipe.

[0017] The sealing mechanism includes a surrounding plate, a sealing ring, a fixed magnetic ring and a movable magnetic plate, the surrounding plate is sleeved in the interior of the cavity, the sealing ring is fixedly connected to the upper surface of the surrounding plate, the fixed magnetic ring is fixedly sleeved in the interior of the sealing ring, the movable magnetic plate is arranged in the interior of the sealing ring, the magnetic poles on the opposite side of the movable magnetic plate and the fixed magnetic ring are opposite, and the outer walls of the movable magnetic plate and the surrounding plate are fixedly covered with sealing rings.

[0018] The conductive assembly comprises a guide rod, a conductive rod, a protection rod and a conductive tab, the guide rod is sleeved on the top end of the support rod, the top end of the guide rod is fixedly installed with a support plate, the lower surface of the support plate is fixedly installed with a reset spring fixedly connected with the top end of the support rod, the top end of the support plate is fixedly connected with a connecting ball, the conductive rod penetrates the connecting ball, the support plate, the guide rod and the support rod in sequence and is electrically connected with the cooling fan through an external connecting wire, the protection rod is fixedly installed at the top end inside the battery protection box, the inside of the protection rod is sleeved with a connecting wire electrically connected with the battery pack, the protection rod and the conductive rod are aligned with each other, and the end portions of the connecting wire and the conductive rod are fixedly connected with the conductive tabs.

[0019] The side of the inner wall of the cavity is fixedly connected with a fixed plate, a guide groove is formed in the middle of the fixed plate, and an extrusion rod is sleeved in the guide groove and fixedly connected with the upper surface of the sealing ring.

[0020] The inside of the communication groove is fixedly embedded with a fixed block, and the fixed block is arranged below the turnover plate and close to one side of the counterweight.

[0021] The inside of the communication groove is fixedly embedded with a fixed block, and the fixed block is arranged below the turnover plate and close to one side of the counterweight.

[0022] The technical effects obtained by the application are:

[0023] When the fire fighting vehicle body is working on water, the water cooling mechanism can drive the sealing mechanism to block the drainage pipe and the battery protection box, and the sealing mechanism can also disconnect the conductive assembly by jacking the turnover plate, and then the air cooling mechanism is disconnected with the battery pack, the cooling fan is stopped synchronously, and the water flow into the cavity provides a water cooling and heat dissipation mode for the battery pack, which can automatically switch the air cooling and heat dissipation to the water cooling and heat dissipation, and reduce the output power of the battery pack when working on water.

[0024] The movable magnetic plate and the sealing ring can be synchronously moved between the drainage pipe and the inner wall of the battery protection box under the action of the surrounding plate, then water flows into the drainage pipe and extrudes the movable magnetic plate between the sealing ring and the inner wall of the battery protection box, so that the sealing mechanism can be stably fixed between the drainage pipe and the inner wall of the battery protection box, and the vibration of the fire fighting vehicle body during running will not make the sealing ring move up and down, so that the water flow is always isolated outside the inner wall of the battery protection box. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1This is a schematic diagram of the fire truck body structure provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the connection structure between the fire truck body and the battery protection box provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the battery protection box provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the battery protection box according to an embodiment of the present invention;

[0029] Figure 5 This is the present invention. Figure 4 Enlarged structural diagram at point A in the middle;

[0030] Figure 6 This is the present invention. Figure 4 A schematic diagram of the enlarged structure at point B;

[0031] Figure 7 This is an exploded structural diagram of the sealing assembly according to an embodiment of the present invention;

[0032] Figure 8 This is a front view structural diagram of the conductive component according to an embodiment of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Fire truck body; 2. Battery protection box; 201. Battery pack; 202. Cavity; 203. Surrounding plate; 204. Drainage pipe; 2041. Air collection hopper; 2042. Filter screen; 205. Air outlet; 206. Water inlet pipe; 207. Top cover plate; 208. Connecting groove; 2081. Fixing block; 3. Cooling fan; 301. Support rod; 302. Guide rod; 303. Support plate; 304. Return spring; 305. Connecting ball; 306. Conductive rod; 4. Sealing ring; 401. Fixed magnetic ring; 402. Movable magnetic plate; 403. Pressing rod; 5. Fixing plate; 6. Flip plate; 601. Slot; 7. Counterweight block; 8. Protective rod; 9. Conductive contact piece. Detailed Implementation

[0035] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0036] like Figures 1-3As shown, a kind of amphibious fire engine power device, including fire engine body 1, the inside fixed mounting of fire engine body 1 has battery protection box 2, the inside installation of battery protection box 2 has battery pack 201, battery pack 201 is used to provide the electric quantity for the opening and closing of fire engine body 1, the top of battery protection box 2 is fixedly installed with top cover plate 207, the top of top cover plate 207 is fixedly installed with multiple electric connection units, electric connection unit is electrically connected with each electric unit in the inside of fire engine body 1, one side of battery protection box 2 is fixedly connected with drainage pipe 204 for guiding air and water, drainage pipe 204 is fixedly embedded in the inside of fire engine body 1.

[0037] Wherein, one end of drainage pipe 204 is fixedly connected with gas collector 2041, gas collector 2041 is set as funnel shape, gas collector 2041 can increase the input caliber of drainage pipe 204, so that the external gas can quickly enter the inside of battery protection box 2, filter screen 2042 for preventing dust and water impurities is fixedly embedded in the inside of gas collector 2041, no matter on the ground or water surface, filter screen 2042 can effectively block external impurities, to ensure the cleanliness inside battery protection box 2, also protect the outer surface of battery pack 201 from adhering dust, so that the heat generated by battery pack 201 during work can be timely dissipated.

[0038] Referring to the accompanying drawings Figure 4 The inside of battery protection box 2 is provided with air cooling mechanism, and the air cooling mechanism includes heat dissipation fan 3, supporting rod 301 and air outlet 205.

[0039] It should be noted that the working of heat dissipation fan 3 can extract external airflow to the inside of battery protection box 2 through drainage pipe 204, then the pressure in the inside of battery protection box 2 increases accordingly, then the airflow in the inside of battery protection box 2 is discharged from the inside of battery protection box 2 through air outlet 205, so as to achieve the purpose of heat dissipation for battery pack 201.

[0040] The water cooling mechanism is arranged in the battery protection box 2, and provides water cooling heat dissipation for the battery pack 201 when the fire fighting vehicle body 1 runs on the water surface.

[0041] According to the above structure, when the fire fighting vehicle body 1 runs into the water, the water flow enters the cavity 202 through the water inlet pipe 206, and the cavity 202 is filled with water as the water flow gradually enters, so that the surface temperature of the battery protection box 2 is reduced, and the heat emitted by the battery pack 201 can be quickly neutralized, so that the battery pack 201 realizes water cooling heat dissipation, and this method uses the existing water source, without the need to pump cold water into the cavity 202, and without the need for the battery pack 201 to provide power support.

[0042] Referring to the accompanying drawings Figure 4 and the accompanying drawings Figure 7 The sealing mechanism is arranged in the battery protection box 2, and is used to block the battery protection box 2. The sealing mechanism comprises a surrounding plate 203, a sealing ring 4, a fixed magnetic ring 401 and a movable magnetic plate 402. The surrounding plate 203 is sleeved in the cavity 202, and the density of the surrounding plate 203 is less than the density of water. When the water flow enters the cavity 202, the surrounding plate 203 is subjected to the extrusion force of the water, and at the same time, the surrounding plate 203 has an upward buoyancy, so that the surrounding plate 203 can quickly move upward along the inside of the cavity 202. The sealing ring 4 is fixedly connected to the upper surface of the surrounding plate 203, the fixed magnetic ring 401 is fixedly sleeved in the sealing ring 4, the inner diameter of the sealing ring 4 is less than the inner diameter of the drainage pipe 204, and the movable magnetic plate 402 is arranged in the sealing ring 4. The magnetic poles on the side of the movable magnetic plate 402 opposite to the fixed magnetic ring 401 are opposite. If the side of the movable magnetic plate 402 facing the fixed magnetic ring 401 is S-pole, the side of the fixed magnetic ring 401 facing the movable magnetic plate 402 is N-pole, so that the fixed magnetic ring 401 and the movable magnetic plate 402 always have a magnetic force of mutual attraction, and the outer walls of the movable magnetic plate 402 and the surrounding plate 203 are fixedly covered with sealing rings. The sealing ring is a common rubber sealing ring on the market, which will not be described in detail here.

[0043] When the water cooling mechanism works, the sealing mechanism is used to block the connection between the battery protection box 2 and the air cooling mechanism, so that the battery pack 201 is isolated from the water flow.

[0044] Specifically, after the water flow enters the inside of the cavity 202, it will push up the surrounding plate 203, and the surrounding plate 203 will move up and push up the sealing ring 4, and the sealing ring 4 will finally rise to the position between the drainage pipe 204 and the battery protection box 2. Since the inner diameter of the sealing ring 4 is smaller than the inner diameter of the drainage pipe 204, the port of the drainage pipe 204 and the battery protection box 2 are sealed at this time, so that the water flow cannot flow into the inside of the battery protection box 2 through the drainage pipe 204, and the battery pack 201 is protected from being contacted by the water flow, so that the battery pack 201 can still work normally.

[0045] It needs to be further explained that when the sealing ring 4 reaches the position between the drainage pipe 204 and the battery protection box 2, the water flow will flow from the inside of the drainage pipe 204, and then the water flow will provide a transverse extrusion force for the movable magnetic plate 402. At this time, the movable magnetic plate 402 is forced to move away from the side of the fixed magnetic ring 401 and move into the inside of the battery protection box 2. For details, please refer to the drawings. Figure 4 A limiting ring for blocking the excessive movement of the movable magnetic plate 402 is arranged on the inner wall of the battery protection box 2, so that the movable magnetic plate 402 will finally be clamped between the inner wall of the battery protection box 2 and the sealing ring 4, so that the sealing ring 4 will not move up and down due to the rocking of the fire truck body 1 on the water surface, and the water flow in the inside of the drainage pipe 204 can always provide an extrusion force for the movable magnetic plate 402 when the fire truck body 1 moves forward, thereby ensuring that the sealing ring 4 can stably block the battery protection box 2.

[0046] For details, please refer to the drawings. Figure 6 and the drawings. Figure 8 The upper part of the air cooling mechanism is provided with a conductive assembly arranged in the inside of the battery protection box 2. When the water cooling mechanism works, the conductive assembly is disconnected from the electrical connection between the battery pack 201 and the air cooling mechanism under the action of the water cooling mechanism, and the air cooling mechanism stops running. The water cooling mechanism alone cools the battery pack 201. The conductive assembly includes a guide rod 302, a conductive rod 306, a protection rod 8 and a conductive contact piece 9. The guide rod 302 is sleeved on the top end of the supporting rod 301, and the supporting rod 301 provides an external limitation for the guide rod 302, so that the guide rod 302 can only move in the vertical direction. The top end of the guide rod 302 is fixedly installed with a supporting plate 303, so that the top end of the supporting plate 303 is fixedly connected with a connecting ball 305. The conductive rod 306 penetrates the connecting ball 305, the supporting plate 303, the guide rod 302 and the supporting rod 301 in sequence and is electrically connected with the cooling fan 3 through an external lead wire. The protection rod 8 is fixedly installed at the top end in the inside of the battery protection box 2. The inside of the protection rod 8 is sleeved with a connecting lead wire electrically connected with the battery pack 201. The protection rod 8 and the conductive rod 306 are aligned with each other. The end portions of the connecting lead wire and the conductive rod 306 are fixedly connected with the conductive contact piece 9. When the two conductive contact pieces 9 are attached together, the cooling fan 3 is electrically connected together with the battery pack 201, so that the cooling fan 3 can rotate.

[0047] Referring to the drawings Figure 4 and the drawings Figure 5 One side of the inner wall of the cavity 202 is fixedly connected with a fixed plate 5, a guide groove is formed in the middle of the fixed plate 5, an extrusion rod 403 fixedly connected with the upper surface of the sealing ring 4 is sleeved in the guide groove, the extrusion rod 403 can enhance the stability of the sealing ring 4, so that the torsion of the sealing ring 4 is reduced when it is impacted by water flow, a communication groove 208 is formed in the inside of the battery protection box 2, the inside of the communication groove 208 is rotatably connected with a turnover plate 6, a slot hole 601 is formed in one side of the lower surface of the turnover plate 6, the slot hole 601 is sleeved on the outer surface of the conductive rod 306 in a sliding manner, a counterweight 7 is fixedly connected with one side of the lower surface of the turnover plate 6, and the counterweight 7 is located on the same vertical line as the extrusion rod 403.

[0048] It should be noted that the turnover plate 6 is turned over at the same time, and the slot hole 601 is correspondingly skewed, the slot hole 601 is skewed and slides along the outside of the conductive rod 306, so that the conductive rod 306 does not hinder the rotation of the turnover plate 6, and the width of the slot hole 601 is smaller than the width of the connecting ball 305, so that the resistance of the turnover plate 6 is smaller when it is turned over.

[0049] Further, the sealing ring 4 moves upward at the same time, driving the extrusion rod 403 to rise synchronously, the extrusion rod 403 rises through the guide groove and extrudes the counterweight 7, at this time the counterweight 7 will lift the turnover plate 6 upward, the turnover plate 6 rotates along the inside of the communication groove 208, at the same time the turnover plate 6 will extrude the connecting ball 305 downward, the connecting ball 305 is extruded and supported by the support plate 303, the support plate 303 is extruded and the guide rod 302 is lowered, at the same time the connecting ball 305 also drives the conductive rod 306 to descend, the conductive rod 306 drives one of the conductive contact pieces 9 to separate from the other conductive contact piece 9, finally the cooling fan 3 is disconnected with the battery pack 201, so that the cooling fan 3 can stop working, and then the cooling mode of the battery pack 201 can be automatically switched from air cooling to water cooling after the fire truck body 1 is submerged in water, and the air cooling mechanism can also be closed at the same time.

[0050] Further, the lower surface of the support plate 303 is fixedly installed with a reset spring 304 fixedly connected with the top end of the support rod 301, the reset spring 304 is initially in a state of contraction and force storage, and then the support plate 303 is always subjected to the upward jacking force of the reset spring 304, so that the support plate 303 always has a tendency to move upward, when the fire engine body 1 lands on the shore, the water flow flows out from the inside of the cavity 202, and then the sealing ring 4 is driven to descend synchronously by the surrounding plate 203, the sealing ring 4 drives the extrusion rod 403 to descend, the counterweight 7 pulls one end of the turnover plate 6 to descend, so that the other end of the turnover plate 6 rises, and then the extrusion force above the connecting ball 305 disappears, at this time, the external extrusion force of the reset spring 304 also disappears, finally the reset spring 304 jacks up the support plate 303, so that the conductive rod 306 rises synchronously, finally the conductive rod 306 drives one of the conductive contact pieces 9 to be attached to the other conductive contact piece 9, at this time, the cooling fan 3 is started again.

[0051] As shown in Figure 5 The inside of the communication groove 208 is fixedly embedded with a fixed block 2081, the fixed block 2081 is arranged below the turnover plate 6 and close to one side of the counterweight 7, the fixed block 2081 can limit the turning angle of the turnover plate 6, avoiding excessive turning of the turnover plate 6 to make the conductive rod 306 excessively rise, and protecting the two conductive contact pieces 9 from being excessively pressed and damaged.

[0052] The working principle of the present application is that when the fire engine body 1 performs water operation, the water flow will first flow into the inside of the cavity 202 through the water inlet pipe 206, so that the surrounding plate 203 is forced to rise, then the sealing mechanism is driven to rise synchronously by the surrounding plate 203 and is sealed between the drainage pipe 204 and the battery protection box 2, so that the external water flow cannot enter the inside of the battery pack 201, and the extrusion rod 403 is driven to rise and jacks up the counterweight 7 in the process of rising of the sealing mechanism, the counterweight 7 jacks up the turnover plate 6, the turnover plate 6 turns over at the same time to disconnect the conductive assembly, and then the cooling fan 3 stops running, so that the cooling mode of the battery pack 201 is switched from air cooling to water cooling.

[0053] The above is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A power plant for an amphibious fire fighting vehicle, characterized in that: Include: The fire truck body (1), the inside of the fire truck body (1) is fixedly provided with a battery protection box (2), the inside of the battery protection box (2) is provided with a battery pack (201), and the battery pack (201) is used to provide power for the opening and closing of the fire truck body (1); The air cooling mechanism is arranged in the inside of the battery protection box (2), and the air cooling mechanism provides air cooling for the battery pack (201) when the fire truck body (1) walks on land; The water cooling mechanism is arranged in the inside of the battery protection box (2), and the water cooling mechanism provides water cooling for the battery pack (201) when the fire truck body (1) walks on water; The sealing mechanism is arranged in the inside of the battery protection box (2), and the sealing mechanism is used for sealing the battery protection box (2); When the water cooling mechanism works, the sealing mechanism is used for sealing the connection between the battery protection box (2) and the air cooling mechanism, and at this time, the battery pack (201) is isolated from the water flow; The conductive assembly is arranged above the air cooling mechanism, and when the water cooling mechanism works, the conductive assembly is disconnected from the air cooling mechanism under the action of the water cooling mechanism, and the air cooling mechanism stops running; One side of the battery protection box (2) is fixedly connected with a drainage pipe (204) for air and water guide; The air cooling mechanism includes a heat dissipation fan (3), a support rod (301) and an air outlet (205), the heat dissipation fan (3) is electrically connected with the battery pack (201), the support rod (301) is fixedly installed in the inside of the battery protection box (2), one end of the support rod (301) is fixedly connected with one side of the heat dissipation fan (3), and the air outlet (205) is arranged on one side of the battery protection box (2), and the heat dissipation fan (3) and the port of the drainage pipe (204) are flush with each other; The water cooling mechanism includes a water inlet pipe (206), the water inlet pipe (206) is fixedly installed on the lower surface of the battery protection box (2), the bottom end of the water inlet pipe (206) penetrates the fire truck body (1), and the inside of the battery protection box (2) is provided with a cavity (202) in communication with the inside of the water inlet pipe (206); The sealing mechanism includes a surrounding plate (203), a sealing ring (4), a fixed magnetic ring (401) and a movable magnetic plate (402), the surrounding plate (203) is sleeved in the inside of the cavity (202), the sealing ring (4) is fixedly connected to the upper surface of the surrounding plate (203), the fixed magnetic ring (401) is fixedly sleeved in the inside of the sealing ring (4), the movable magnetic plate (402) is arranged in the inside of the sealing ring (4), and the opposite side magnetic poles of the movable magnetic plate (402) and the fixed magnetic ring (401) are opposite, and the outer walls of the movable magnetic plate (402) and the surrounding plate (203) are fixedly covered with sealing rings; The conductive assembly includes a guide rod (302), a conductive rod (306), a protection rod (8) and a conductive tab (9), the guide rod (302) is sleeved on the top end of the support rod (301), the top end of the guide rod (302) is fixedly installed with a support plate (303), the lower surface of the support plate (303) is fixedly installed with a reset spring (304) fixedly connected with the top end of the support rod (301), the top end of the support plate (303) is fixedly connected with a connecting ball (305), the conductive rod (306) penetrates the connecting ball (305), the support plate (303), the guide rod (302) and the support rod (301) in sequence and is electrically connected with the cooling fan (3) through the external connecting wire, the protection rod (8) is fixedly installed at the top end inside the battery protection box (2), the inside of the protection rod (8) is sleeved with a connecting wire electrically connected with the battery pack (201), the protection rod (8) and the conductive rod (306) are aligned with each other, and the connecting wire and the end portion of the conductive rod (306) are fixedly connected with the conductive tab (9); One side of the inner wall of the cavity (202) is fixedly connected with a fixed plate (5), a guide groove is formed in the middle portion of the fixed plate (5), and an extrusion rod (403) fixedly connected with the upper surface of the sealing ring (4) is sleeved in the guide groove; The inside of the battery protection box (2) is provided with a communication groove (208), the inside of the communication groove (208) is rotatably connected with a turnover plate (6), one side of the turnover plate (6) is provided with a slot hole (601), the slot hole (601) is slidably sleeved on the outer surface of the conductive rod (306), and one side of the lower surface of the turnover plate (6) is fixedly connected with a counterweight (7), the counterweight (7) and the extrusion rod (403) are located on the same vertical line.

2. An amphibious fire fighting vehicle power plant as claimed in claim 1, wherein: The top end of the battery protection box (2) is fixedly installed with a top cover plate (207), a plurality of power connection units are fixedly installed on the top end of the top cover plate (207), and the drainage pipe (204) is fixedly embedded in the inside of the fire truck body (1).

3. An amphibious fire fighting vehicle power plant as claimed in claim 2, wherein: One end of the drainage pipe (204) is fixedly connected with a gas collecting hopper (2041), the gas collecting hopper (2041) is funnel-shaped, and a filter screen (2042) for preventing dust and water impurities is fixedly embedded in the inside of the gas collecting hopper (2041).

4. An amphibious fire fighting vehicle power plant as claimed in claim 1, wherein: The inside of the communication groove (208) is fixedly embedded with a fixed block (2081), the fixed block (2081) is arranged below the turnover plate (6) and close to one side of the counterweight (7).

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