Fire suppression device

Abstract

The invention discloses a fire suppression device which aims at solving the problems that a traditional foam fire extinguishing device is interrupted in single-time liquid supply, non-adjustable in mixing proportion and poor in underground environment adaptability, efficient fire extinguishing is achieved through the synergistic effect of an intelligent omni-directional moving chassis and dynamic foam mixing control, and the fire suppression device moves to a fire source after fire response. Carrying out mechanical foaming on the pre-stored mixed liquid while moving; after reaching, the multi-stage pump is started, and foams are sprayed in multiple modes through the upper water cannon, the lower water cannon and the handheld interface; when the foam stock is lower than a threshold value, the control assembly automatically starts the fire hydrant to replenish water, the water flow signal sensor triggers the foam stock solution to be injected according to a preset proportion, continuous foaming is achieved through combination with the stirring head, and spraying and replenishing are achieved at the same time. Through real-time liquid level monitoring, accurate proportion mixing and multi-mode spraying, the underground garage fire response speed and fire extinguishing efficiency are remarkably improved, and the core pain points that traditional equipment is interrupted in liquid supply and complex in operation are solved.

Description

Technical Field

[0001] The invention relates to the field of fire-fighting equipment control methods, and in particular to a fire suppression device. Background Art

[0002] In the field of fire protection, traditional foam fire extinguishing devices are widely used, but they have many limitations. Most traditional devices rely on pressure vessels to store foam fire extinguishing agents, which not only makes the devices extremely inconvenient during use, but also leads to a series of maintenance problems. Pressure vessels require regular annual inspections to ensure their safety and reliability. The annual inspection process is cumbersome and costly, which undoubtedly increases the manpower, material and time costs of the user unit.

[0003] In the existing technology, some small foam medium mobile fire-fighting equipment has operational delays and safety risks in underground environments with smoke and obstructed vision; and there is a risk of medium supply interruption, relying on pressure vessels to pre-store foam fire extinguishing agents, which need to be manually replenished after a single exhaustion, delaying the fire-fighting opportunity; especially for electric vehicle battery fires, their high temperature and high spread rate characteristics require the fire-fighting system to have the function of continuously providing fire-fighting medium, but the existing small mobile fire-fighting equipment usually cannot meet this demand, significantly reducing the fire-fighting efficiency; therefore, there is an urgent need for a fire suppression device with dynamic mixing control to solve the core pain points of traditional technologies in terms of response speed, continuous supply of fire-fighting medium and operational safety. Summary of the invention

[0004] The present invention provides a fire suppression device which can effectively solve the above problems.

[0005] The present invention is achieved in that: A fire suppression device, comprising: A frame, a foam generating box arranged on the frame, a water inlet pipe connected to the foam generating box through a first electric valve, a foam stock liquid box connected to the foam generating box through a second electric valve, a water flow signal sensor arranged on the water inlet pipe, a mechanical stirring device arranged on the foam generating box, a spraying assembly including a multi-stage pump arranged on the frame, and a control assembly; Among them, the water inlet pipe is used to connect with an external fire water source; the control component is used to obtain the volume of foam in the foam generating box; the control component is also used to open the first electric valve when the foam is lower than a preset threshold value R, so that the external water source is injected into the foam generating box. After the water flow signal sensor detects the water flow, it controls the opening of the second electric valve, and injects the foam stock solution in the foam stock solution box into the foam generating box according to the preset ratio K of foam stock solution and water, and then stirs it through a mechanical stirring device for mechanical foaming, thereby realizing the generation of new foam while spraying foam and stirring, and uninterrupted supply of foam.

[0006] Further improved, the control component is based on the multi-stage pump running time T and the preset pump flow rate Q pump , calculate the remaining foam volume V in the foam generating box t , when V t ≤R, the first electric valve is opened and the control component will control the second electric valve to open only when the water flow signal sensor detects water flow.

[0007] Further improved, the foam generating box comprises a box body, a baffle is arranged in the box body, so that the box body forms a first cavity and a second cavity, a water hole is arranged on the baffle to connect the first cavity and the second cavity, a water inlet pipe is arranged on the side of the first cavity, a liquid inlet pipe is arranged on the side of the second cavity, the liquid inlet pipe is connected to the foam raw liquid tank, a second electric valve is arranged on the liquid inlet pipe, and an overflow port is arranged on the side of the first cavity near the top. The mechanical stirring device comprises a stirring motor and a stirring head. The stirring head is arranged in the second cavity and driven by the stirring motor. The stirring head is used for performing foaming in the second cavity by mechanical stirring.

[0008] Further improvements include an intelligent omnidirectional mobile chassis, which has two freely switchable remote control walking modes and autonomous walking modes; The remote control walking mode allows the operator to operate through the remote control terminal; The autonomous walking mode can intelligently obtain the location and plan the travel path.

[0009] As a further improvement, a float switch is further provided in the foam generating box. When the liquid level in the foam generating box reaches a threshold value and triggers the float switch, the control component receives a signal from the float switch and controls the first electric valve and the second electric valve to close.

[0010] Further improved, the spray assembly also includes an upper water cannon with an electric telescopic rod, a handheld water cannon interface and a lower water cannon arranged on the side of the frame near the bottom, and a reversing valve is provided at the water outlet end of the multi-stage pump, wherein the upper water cannon is used to spray foam from the top to cover the fire source; the lower water cannon is used for directional spraying at the bottom of the vehicle or the ground; the handheld water cannon interface is used for personnel to connect an external water gun to flexibly suppress the fire at close range.

[0011] As a further improvement, the intelligent omnidirectional mobile chassis is provided with an obstacle avoidance radar, which is used to monitor the surrounding environment in real time, detect surrounding obstacles, and adjust the route in time.

[0012] As a further improvement, the intelligent omnidirectional mobile chassis is provided with at least two front and rear visible light cameras and one thermal imaging camera, which can transmit visible light and thermal imaging images in real time through the control component for the operator to remotely adjust the direction of travel and observe the on-site situation.

[0013] A further improvement is to include a power supply assembly for providing a movable power source to the device.

[0014] As a further improvement, a sewage outlet is also provided on the side of the box body.

[0015] The beneficial effects of the present invention are: Safe, convenient and low maintenance cost: The mechanical stirring foam generating box avoids the potential safety hazards such as explosion of the pressure vessel, making it safer to use. At the same time, there is no need for annual inspection of the pressure vessel, which greatly reduces the maintenance work and cost, making the maintenance and management of the device easier; By monitoring the liquid level in the foam generating box and combining the water flow signal sensor with the dual electric valve linkage, the precise ratio of foam concentrate and water can be achieved to ensure continuous foaming, thus solving the pain point of traditional equipment that requires manual replenishment after a single exhaustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram A provided by an embodiment of the present invention.

[0018] Figure 2 It is a structural diagram B provided by an embodiment of the present invention.

[0019] Figure 3 Schematic diagram A of the foam generating box structure provided by an embodiment of the present invention.

[0020] Figure 4 Schematic diagram B of the foam generating box structure provided in an embodiment of the present invention.

[0021] Reference numerals: 1. Frame; 2. Control component; 31. Foam liquid tank; 32. Foam generating box; 321. Overflow outlet; 322. Drain outlet; 323. Baffle; 324. First cavity; 325. Second cavity; 326. Water hole; 327. Stirring motor; 328. Stirring head; 329. Float switch; 33. Liquid inlet pipe; 34. Second electric valve; 35. Water inlet pipe; 36. Water flow signal sensor; 37. First electric valve; 41. Water supply cannon; 411. Telescopic rod; 42. Handheld water cannon interface; 43. Multi-stage pump; 44. Reversing valve; 45. Water discharge cannon; 5. Power supply component; 7. Intelligent omnidirectional mobile chassis; 71. Obstacle avoidance radar; 72. Visible light camera; 73. Thermal imaging camera. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0023] In the description of the present invention, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Reference Figure 1-4 As shown, an underground garage fire suppression device includes a frame 1, which is frame-type for easy installation and maintenance, a foam generating box 32 arranged on the frame 1, a water inlet pipe 35 connected to the foam generating box 32 through a first electric valve 37, and a foam concentrate tank 31 connected to the foam generating box 32 through a second electric valve 34, and a switchable decorative panel is also provided on the outer side of the frame 1; a control component 2 is used to control the switching of each valve and the start and stop of a multi-stage pump 43, wherein the control component 2 includes a programmable PLC, a display screen, a relay, and a plurality of buttons for switching and adjusting the state, and the relay is used to control the start and stop of the multi-stage pump 43.

[0025] The power supply component 5 provides power for the entire fire suppression device. In this embodiment, a fuel generator is preferably used. The fuel generator has a one-button start function. The control component 2 controls the start of the fuel generator to facilitate the start operation.

[0026] A mechanical stirring foam generating box is adopted. The foam generating box is a non-sealed tank body, which can stir foam on site and stir new foam while spraying. The fire spread is effectively contained by continuously spraying foam until professional firefighters arrive at the scene for more standardized and safe disposal. The foam generating assembly includes a foam stock liquid tank 31 for storing foam stock liquid and a foam generating box 32. The foam generating box 32 is used to mix and stir the foam stock liquid and water for foaming. The foam stock liquid tank 31 is connected to the foam generating box 32 through a water pipe, wherein the foam generating box 32 includes a box body, a baffle 323 is provided in the box body, so that the box body is formed with a first cavity 324 and a second cavity 325, a water hole 326 is provided on the baffle 323 to connect the first cavity 324 and the second cavity 325, a water inlet pipe 35 is provided on the side of the first cavity 324, and the water inlet pipe 35 can be connected to the fire hydrant when in use, and the water source is provided by the fire hydrant, and a liquid inlet pipe 33 is provided on the side of the second cavity 325, and the liquid inlet pipe 33 is connected to the foam stock liquid tank 3 1, the foam stock tank 31 is located above the foam generating tank 32, and the foam stock can flow downward from a high place into the foam generating tank 32, a first electric valve 37 and a water flow signal sensor 36 are provided on the water inlet pipe 35, and a second electric valve 34 is provided on the liquid inlet pipe 33, the two electric valves and the water flow signal sensor 36 are connected to the PLC, and an overflow port 321 is provided near the top of the side of the first cavity 324 to prevent the continuous infusion of water into the tank after the first electric valve 37 fails; the mechanical stirring device includes a stirring motor 327 and a stirring head 328, the stirring head 328 is provided in the second cavity 325 and driven by the stirring motor 327, and the foam stock is stirred and foamed in the second cavity 325, and a float switch 329 is also provided on the inner side of the first cavity 324, and the float switch 329 is electrically connected to the control component 2, and the float switch 329 is triggered when the water level reaches the predetermined maximum water level and transmits the signal to the control component 2, and a sewage outlet 322 is also provided on the side of the box.

[0027] The spray assembly includes a water supply cannon 41, a handheld water cannon interface 42, and a multistage pump 43 provided on the foam generating box 32. The multistage pump 43 is an ultra-long-distance multistage pump 43, which has a large head and can spray foam to a long distance. The water outlet of the multistage pump 43 is connected to a reversing valve 44, which is respectively connected to the water supply cannon 41 and the handheld water cannon interface 42 through a water pipe, and can control the switching of the water supply cannon 41 and the handheld water cannon.

[0028] To facilitate the movement of the device, an intelligent omnidirectional mobile chassis 7 is set at the bottom of the frame. It is driven by a powerful motor, has dual modes of remote control and autonomous walking, and communicates with the PLC. In the remote control mode, the operator can accurately control the forward, backward, steering and other actions of the device through the matching remote control terminal, meeting the operation requirements in long-distance and dangerous environments, making the operator safer; the autonomous walking mode relies on the built-in intelligent algorithm and positioning module, and the chassis can automatically plan the path and move according to the preset route or target point.

[0029] The intelligent omnidirectional mobile chassis 7 is equipped with a high-precision obstacle avoidance radar 71, which monitors the surrounding environment in real time, can detect surrounding obstacles, and adjust the route in time. At the same time, it is equipped with at least two visible light cameras 72 and a thermal imaging camera 73. The visible light camera 72 provides a clear visual picture for environmental monitoring and target recognition, and the thermal imaging camera 73 can detect fire sources, high-temperature objects, etc., and can work normally even in harsh environments such as darkness and smoke.

[0030] In order to facilitate the adjustment of the vertical spray angle of the water cannon 41, a telescopic rod 411 is also provided. The telescopic rod 411 can be an electric telescopic rod 411, but is not limited to the electric telescopic rod 411. The electric telescopic rod 411 is electrically connected to and controlled by the PLC.

[0031] Since the flame of some existing electric vehicle batteries on fire is sprayed downward, the spray assembly can also be equipped with a water cannon 45 connected to the reversing valve 44. The water cannon 45 is arranged on the side of the frame 1 near the bottom, and can spray foam to the bottom of the vehicle.

[0032] The control method of the fire suppression device comprises the following steps: In the standby state, a certain amount of water is pre-filled in the foam generating box 32, and a corresponding proportion of foam stock solution is added; S1. Fire response and fire suppression at the fire point: After the control component 2 receives the fire signal, it can be triggered by the fire signal sent by the smart fire warning system platform or the button on the control component 2. After determining the fire location, the device stirs and foams and moves to the fire point through the intelligent omnidirectional mobile chassis 7. After arriving, it sprays foam to suppress the fire; S2, continuous water supply control: the operator connects the fire hydrant to the foam generating box 32 and controls the water inlet through the first electric valve 37, and the water flow signal sensor 36 can sense whether there is water inflow; S3. Dynamic foam mixing control: When the foam in the foam generating box 32 is lower than the preset threshold value R, the control component 2 opens the first electric valve 37 to inject the fire hydrant water into the foam generating box 32. After the water flow signal sensor 36 detects the water flow, the control component 2 opens the second electric valve 34 to inject the foam solution in the foam solution tank 31 into the foam generating box 32 according to the preset ratio K of foam solution to water, and then stirs it through the stirring head 328 for mechanical foaming, thereby achieving the goal of spraying foam while stirring to generate new foam and supplying foam uninterruptedly.

[0033] Specifically, the method for mixing and filling the foam stock solution and water in step S3 can adopt the following scheme. The foam expansion coefficient F of the foam is constant, which is determined by the foam stock solution with different coefficients and is used in the design of fire water supply systems for various industrial and civil buildings. The state has clarified the flow rate, pressure and layout requirements of the fire hydrant system. When it is applied to different scenes, its flow rate may be different. When arranging the fire suppression device, its parameters are adjusted in advance. When using it, the opening time of the first electric valve 37 is calculated and controlled according to the corresponding water supply flow rate, and the water intake per second Q of the foam generating box 32 is controlled. water And the foam box 32 liquid inlet per second Q foam The control component 2 is based on the running time T1 of the multistage pump 43 and the preset pump flow rate Q pump , and the pre-stored foam volume V0 calculates the remaining foam volume V of the foam generating box 32 t , when V t ≤R, the first electric valve 37 is opened and after the water flow signal sensor 36 detects the water flow, the control component 2 opens the second electric valve 34, and the time length of the water flow after the first electric valve 37 is opened is T2, and the mixing ratio of water and foam concentrate is controlled by controlling the opening time length of the first electric valve 37 and the second electric valve 34, wherein, V t =V0+(Q water +Q foam )×T2×F-T1×Q pump Specifically, the method of mixing and filling the foam stock solution and water in step S3 can also adopt another scheme, the foaming coefficient F of the foam is constant, and the water intake per second of the foam generating box 32 is Q water And the foam box 32 liquid inlet per second Q foam The ratio is preset as K2. In step S3, the control component 2 is based on the running time T1 of the multi-stage pump 43 and the preset pump flow rate Q pump , calculate the remaining foam volume V of the foam generating box 32 t , when V t≤R, the first electric valve 37 is opened and after the water flow signal sensor 36 detects the water flow, the control component 2 opens the second electric valve 34, and the time length for water to flow through after the first electric valve 37 is opened is T2. The difference from the previous control scheme is that the second electric valve 34 used in this scheme needs to be able to adjust the opening of the switch, but the mixing process will be more uniform.

[0034] Specifically, in step S1: after the control component 2 receives the fire signal, it executes the system self-check process, including detecting the liquid level of the foam stock liquid tank 31, the state of the stirring motor 327 and the opening and closing state of each valve, and starting the power supply component 5 according to the preset program; The intelligent omnidirectional mobile chassis 7 is moved to the fire occurrence point, and the foam generating box 32 is pre-stored with a mixed liquid to be stirred. During the movement, the stirring motor 327 is started to drive the stirring head 328 to mechanically foam the mixed liquid; After the stirring is completed and the fire occurs, the multi-stage pump 43 is started to spray foam through the spray assembly to suppress the fire.

[0035] Specifically, the intelligent omnidirectional mobile chassis 7 has two freely switchable remote control walking modes and autonomous walking modes; The remote control walking mode allows the operator to operate through the remote control terminal; The autonomous walking mode can intelligently obtain the location and plan the travel path.

[0036] Specifically, a float switch 329 is also provided in the foam generating box 32. When the liquid level in the foam generating box 32 reaches a threshold, the float switch 329 is triggered. The control component 2 receives a signal from the float switch 329 to control the first electric valve 37 and the second electric valve 34 to close.

[0037] Specifically, the control component 2 starts the multi-stage pump 43, and the operator selects different modes according to the fire situation; Water monitor 41 mode: spray foam from the top to cover the fire source; Water cannon 45 mode: directional spraying at the bottom of the vehicle or the ground; Handheld interface mode: allows personnel to connect an external water gun to flexibly suppress fire at close range.

[0038] Specifically, in the remote control mode, the intelligent omnidirectional mobile chassis 7 transmits visible light and thermal imaging images in real time through the display screen of the control component 2, so that the operator can remotely adjust the travel direction.

[0039] Specifically, the operator can also transmit visible light and thermal imaging images in real time through the display screen of the control component 2, and use the remote control terminal to control the electric telescopic rod 411 to adjust the spray angle of the water cannon 41; real-time transmission of visible light and thermal imaging images assists the operator in remote decision-making and improves the accuracy of operation.

[0040] Specifically, in step S3: when the water level in the foam generating box 32 exceeds the preset threshold level of the float switch 329, the first electric valve 37 is automatically closed to avoid damage to the equipment.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fire suppression device, characterized in that: include: A frame (1), and a foam generating box (32) arranged on the frame (1), a water inlet pipe (35) connected to the foam generating box (32) via a first electric valve (37), a foam stock solution box (31) connected to the foam generating box (32) via a second electric valve (34), a water flow signal sensor (36) arranged on the water inlet pipe (35), a mechanical stirring device arranged on the foam generating box (32), a spraying assembly arranged on the frame (1) and comprising a multi-stage pump (43), and a control assembly (2); The water inlet pipe (35) is used to connect to an external fire water source; the control component (2) is used to obtain the volume of foam in the foam generating box (32); the control component (2) is also used to open the first electric valve (37) when the foam is lower than a preset threshold value R, so that the external water source is injected into the foam generating box (32); after the water flow signal sensor (36) detects the water flow, it controls the opening of the second electric valve (34), injects the foam stock solution in the foam stock solution box (31) into the foam generating box (32) according to a preset ratio K of the foam stock solution to water, and then stirs the foam through a mechanical stirring device to perform mechanical foaming, thereby achieving the goal of spraying foam while stirring to generate new foam, and continuously supplying foam.

2. A fire suppression device according to claim 1, characterized in that: The control component (2) controls the operation time T of the multi-stage pump (43) and the preset pump flow rate Q. pump , calculate the remaining foam volume V in the foam generating box (32) t , when V t When ≤R, the first electric valve (37) is opened and the control component (2) controls the second electric valve (34) to open only when the water flow signal sensor (36) detects water flow.

3. A fire suppression device according to claim 1, characterized in that: The foam generating box (32) comprises a box body, a baffle (323) is provided in the box body, so that the box body forms a first cavity (324) and a second cavity (325), the baffle (323) is provided with a water hole (326) so that the first cavity (324) and the second cavity (325) are connected, a water inlet pipe (35) is provided on the side of the first cavity (324), a liquid inlet pipe (33) is provided on the side of the second cavity (325), the liquid inlet pipe (33) is connected to the foam raw liquid box (31), a second electric valve (34) is provided on the liquid inlet pipe (33), and a water overflow port (321) is provided on the side of the first cavity (324) near the top. The mechanical stirring device comprises a stirring motor (327) and a stirring head (328); the stirring head (328) is arranged in the second cavity (325) and driven by the stirring motor (327); the stirring head (328) is used to perform foaming in the second cavity (325) by means of mechanical stirring.

4. A fire suppression device according to claim 1, characterized in that: It also includes an intelligent omnidirectional mobile chassis (7) having two freely switchable remote control walking modes and an autonomous walking mode; The remote control walking mode allows the operator to operate through the remote control terminal; The autonomous walking mode can intelligently obtain the location and plan the travel path.

5. A fire suppression device according to claim 3, characterized in that: A float switch (329) is also provided in the foam generating box (32). When the liquid level in the foam generating box (32) reaches a threshold value and triggers the float switch (329), the control component (2) receives a signal from the float switch (329) and controls the first electric valve (37) and the second electric valve (34) to close.

6. A fire suppression device according to claim 1, characterized in that: The spray assembly further comprises an upper water cannon (41) provided with an electric telescopic rod (411), a handheld water cannon interface (42), and a lower water cannon (45) provided on the side of the frame (1) near the bottom, wherein a reversing valve (44) is provided at the water outlet end of the multi-stage pump (43), wherein the upper water cannon (41) is used to spray foam from the top to cover the fire source; the lower water cannon (45) is used to spray directional foam at the bottom of the vehicle or the ground; and the handheld water cannon interface (42) is used for personnel to connect an external water gun to flexibly suppress the fire at close range.

7. A fire suppression device according to claim 4, characterized in that: The intelligent omnidirectional mobile chassis (7) is provided with an obstacle avoidance radar (71), and the obstacle avoidance radar (71) is used to monitor the surrounding environment in real time, detect surrounding obstacles, and adjust the travel route in a timely manner.

8. A fire suppression device according to claim 4, characterized in that: The intelligent omnidirectional mobile chassis (7) is provided with at least two visible light cameras (72) at the front and rear and a thermal imaging camera (73), which can transmit visible light and thermal imaging images in real time through the control component (2) for the operator to remotely adjust the direction of travel and observe the on-site situation.

9. A fire suppression device according to claim 4, characterized in that: It also includes a power supply component (5) for providing a movable power source to the device.

10. A fire suppression device according to claim 3, characterized in that: The side of the box body is also provided with a sewage outlet (322).

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