Fire extinguishing system for fire truck and fire truck

Abstract

The present invention discloses a fire extinguishing system for a fire truck and a fire truck, the fire extinguishing system comprises: an inert gas generator for generating inert gas; a first delivery pipeline, the inlet end of the first delivery pipeline is connected to the outlet end of the inert gas generator; a fire extinguishing agent injection assembly, the inlet end of the fire extinguishing agent injection assembly is connected to the outlet end of the first delivery pipeline; a first pressure detector for detecting the internal pressure of the fire extinguishing agent injection assembly; a throttle valve connected to the first delivery pipeline; a controller, which is connected to the first pressure detector and the throttle valve in communication and is configured to: control the inert gas generator to input inert gas into the fire extinguishing agent injection assembly; determine that the pressure inside the fire extinguishing agent injection assembly reaches a first preset pressure value; control the throttle valve to open a working mode to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly. The fire extinguishing system for a fire truck and the fire truck can stably provide inert gas to the fire extinguishing agent injection assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and in particular to a fire extinguishing system for a fire fighting truck and a fire fighting truck. Background Art

[0002] The fire extinguishing system used in fire trucks includes a fire extinguishing agent container and an inert gas generator. When extinguishing a fire, the head valve of the inert gas generator is opened and the inert gas (such as nitrogen) is used as the power to provide pressure to the powder fire extinguishing agent container, push the powder fire extinguishing agent, and transport it to the powder injection device through a pipeline. Then, the powder fire extinguishing agent is aimed at the fire source through manual or automatic adjustment to achieve the purpose of extinguishing solid, oil, gas and electrical fires.

[0003] However, in the prior art, when the inert gas generator directly drives the fire extinguishing agent to spray, as the inert gas generator continuously fills the fire extinguishing agent container with gas, the pressure of the fire extinguishing agent container gradually increases, and the flow rate of the inert gas generator gradually decreases. Finally, when the pressure of the fire extinguishing agent container is equivalent to the maximum pressure of nitrogen provided by the inert gas generator, the inert gas generator stops the inert gas release measure, which will cause the inert gas generator to be forced to shut down. When the subsequent fire extinguishing operation begins, the inert gas generator is still in a shutdown state and cannot continue to provide stable inert gas for the fire extinguishing operation. Summary of the invention

[0004] The purpose of the present invention is to provide a fire extinguishing system for a fire truck and a fire truck, which have the advantages of simple control and can stably provide inert gas for the fire extinguishing agent injection component in the fire extinguishing system.

[0005] In order to achieve the above object, the present invention provides a fire extinguishing system for a fire truck in a first aspect, characterized in that the fire extinguishing system comprises:

[0006] An inert gas generator, used to generate inert gas;

[0007] a first delivery pipeline, wherein an inlet end of the first delivery pipeline is connected to an outlet end of the inert gas generator;

[0008] A fire extinguishing agent injection assembly, the inlet end of the fire extinguishing agent injection assembly is connected to the outlet end of the first delivery pipeline;

[0009] A first pressure detector, used to detect the internal pressure of the fire extinguishing agent injection assembly;

[0010] A throttle valve connected to the first delivery pipeline;

[0011] A controller is connected in communication with the first pressure detector and the throttle valve and is configured to:

[0012] Controlling the inert gas generator to input inert gas into the fire extinguishing agent injection assembly;

[0013] Determining that the pressure inside the fire extinguishing agent injection assembly reaches a first preset pressure value;

[0014] Control the throttle valve to open the working mode to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly.

[0015] In an embodiment of the present invention, the controller is further configured to:

[0016] After the throttle valve is turned on in the working mode, determining that the pressure inside the fire extinguishing agent injection assembly reaches a second preset pressure value;

[0017] Control the fire extinguishing agent injection assembly to perform fire extinguishing operations;

[0018] Controls the throttle valve closing working mode.

[0019] In an embodiment of the present invention, the fire extinguishing system further includes a second pressure detector and a flow detector both disposed on the first delivery pipeline and communicatively connected to the controller, and the controller is further configured to:

[0020] After determining that the fire extinguishing agent injection assembly performs a fire extinguishing operation, obtaining a first detection value of the second pressure detector and a second detection value of the flow detector;

[0021] Determining that the first detection value is not within a first preset range and / or the second detection value is not within a second preset range;

[0022] The inert gas generator is adjusted according to the first detection value and / or the second detection value, so that the first detection value is within a first preset range and the second detection value is within a second preset range.

[0023] In an embodiment of the present invention, a fire extinguishing agent injection assembly includes a fire extinguishing agent holding tank, a second delivery pipe, a first switch valve and an injection member for injecting the fire extinguishing agent, the first pressure detector is arranged on the fire extinguishing agent holding tank, the outlet end of the first delivery pipe is connected to the inlet end of the fire extinguishing agent holding tank, the outlet end of the fire extinguishing agent holding tank is connected to the inlet end of the injection member through the second delivery pipe, and the first switch valve is arranged in the second delivery pipe.

[0024] In an embodiment of the present invention, the throttle valve includes a housing with an airflow channel formed therein and a switch assembly for opening or closing the airflow channel, the airflow channel is connected to the first delivery pipeline, and the switch assembly is communicatively connected to the controller.

[0025] In an embodiment of the present invention, the throttle valve also includes a baffle and a first elastic blocking component. The baffle is arranged in the airflow channel and is used to separate the airflow channel into a first branch and a second branch. The interior of the shell also forms a first installation cavity below the baffle. The first elastic blocking component is arranged in the first installation cavity and is used to connect the first branch and the second branch under the triggering action of the switch component.

[0026] In an embodiment of the present invention, the first elastic blocking assembly includes a first spring and a sealing plate vertically arranged in the first mounting cavity, the sealing plate is arranged above the first spring and is used to resist the lower end of the blocking plate, and the switch assembly includes a power member communicated with the controller and a push rod for applying pressure to the sealing plate when the power member performs a driving function.

[0027] In an embodiment of the present invention, the switch assembly also includes a push member and a second spring, the upper end of the push member is drivingly connected to the power member, the lower end of the push member is connected to the upper end of the second spring, and the lower end of the second spring is used to apply pressure to the push rod.

[0028] In an embodiment of the present invention, a second cavity and a third cavity located below the second cavity are also formed inside the shell, an elastic diaphragm is provided between the second cavity and the third cavity, the air flow channel is located below the third cavity, the lower end of the second spring abuts against the upper end surface of the elastic diaphragm, and the upper end of the push rod abuts against the lower end surface of the elastic diaphragm.

[0029] A second aspect of the present invention provides a fire truck, which includes the above-mentioned fire extinguishing system for a fire truck.

[0030] It can be known from the above technical scheme that the fire extinguishing system includes an inert gas generator, a first delivery pipeline, a fire extinguishing agent injection assembly, a first pressure detector, a throttle valve and a controller, wherein the controller is configured to: control the inert gas generator to input inert gas into the fire extinguishing agent injection assembly; determine that the pressure inside the fire extinguishing agent injection assembly reaches a first preset pressure value; control the throttle valve to open the working mode to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly. A portion of the inert gas in the first delivery pipeline can be released to the outside atmosphere (or other containers) to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly, avoid the situation where the pressure inside the fire extinguishing agent injection assembly and the first delivery pipeline suddenly decreases, causing the inert gas generator to be forced to shut down, so that the inert gas generator is always in a stable gas transmission state to the outside, providing continuous and safe inert gas output for the injection of fire extinguishing agents in subsequent fire extinguishing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0032] Figure 1 Schematic diagram of the composition of the fire extinguishing system in an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the structure of the throttle valve in the embodiment of the present invention when the throttle valve is not exhausting gas;

[0034] Figure 3 It is a schematic structural diagram of the throttle valve exhaust in an embodiment of the present invention.

[0035] Description of Reference Numerals

[0036] 1-inert gas generator; 2-first delivery pipeline; 3-extinguishing agent injection assembly; 301-extinguishing agent holding tank; 302-second delivery pipeline; 303-first switch valve; 304-injection member; 4-first pressure detector; 5-throttle valve; 501-air flow channel; 5011-first branch channel; 5012-second branch channel; 502-housing; 503-switch assembly; 5031-power member; 5032-push rod; 5033-reciprocating member; 5034-second spring; 504-blocking plate; 505-first elastic blocking assembly; 5051-first spring; 5052-sealing pressing plate; 506-first installation cavity; 507-second cavity; 508-third cavity; 509-elastic diaphragm; 6-controller; 7-second pressure detector; 8-flow detector; 9-second switch valve. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0038] When the inert gas generator 1 in the fire extinguishing system inputs inert gas to the fire extinguishing agent injection assembly 3, since the entire fire extinguishing system is in a fully closed state, as the pressure inside the fire extinguishing agent injection assembly 3 rises, the inert gas generator 1 will sacrifice flow rate to increase pressure. After the inert gas is input into the fire extinguishing agent injection assembly 3, as time goes by, the pressure inside the fire extinguishing agent injection assembly 3 gradually rises and will reach the pressure setting value of the inert gas generator 1. After that, the inert gas generator 1 will no longer provide inert gas to the outside. At this time, the following two situations will occur: First, if the fire extinguishing agent injection assembly 3 performs the fire extinguishing operation in time, the pressure inside the fire extinguishing agent injection assembly 3 and in the first delivery pipeline 2 will suddenly decrease, and the inert gas generator 1 will be shut down, and it will not be able to provide continuous protection for subsequent fire extinguishing operations; Second, if the fire extinguishing agent injection assembly 3 performs the fire extinguishing operation in time, the inert gas generator 1 will no longer provide inert gas to the outside, and the inert gas generator 1 will be forced to shut down. When the fire extinguishing agent injection assembly 3 needs to perform the fire extinguishing operation, it takes a certain amount of time for the inert gas generator 1 to start and stabilize the gas production state, and it still cannot provide continuous protection for subsequent fire extinguishing operations.

[0039] In order to solve the above technical problems, the embodiments of the present invention provide a novel fire extinguishing system for a fire truck, such as Figure 1 As shown, the fire extinguishing system includes:

[0040] An inert gas generator 1, used for generating an inert gas;

[0041] a first delivery pipeline 2, wherein an inlet end of the first delivery pipeline 2 is connected to an outlet end of the inert gas generator 1;

[0042] A fire extinguishing agent injection assembly 3, the inlet end of the fire extinguishing agent injection assembly 3 is connected to the outlet end of the first delivery pipeline 2;

[0043] A first pressure detector 4, used to detect the internal pressure of the fire extinguishing agent injection assembly 3;

[0044] A throttle valve 5 connected to the first delivery pipeline 2;

[0045] The controller 6 is in communication with the first pressure detector 4 and the throttle valve 5 and is configured to perform the following steps:

[0046] Step S101: controlling the inert gas generator 1 to input inert gas into the fire extinguishing agent injection assembly 3;

[0047] Step S102: Determine whether the pressure inside the fire extinguishing agent spraying assembly 3 reaches a first preset pressure value;

[0048] Step S103: Control the throttle valve 5 to start the working mode to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly 3.

[0049] In this embodiment, the inert gas provided by the inert gas generator 1 is nitrogen; a second switch valve 9 for opening or closing the first delivery pipeline 2 is provided on the first delivery pipeline 2, and the second switch valve 9 is communicated with the controller 6 and is a one-way ball valve, which can prevent the inert gas in the first delivery pipeline 2 from flowing back into the inert gas generator 1; the first pressure detector 4 detects the internal pressure of the fire extinguishing agent injection assembly 3 and sends the detection result to the controller 6.

[0050] Specifically, a first preset pressure value is pre-stored in the controller 6. After the controller 6 controls the inert gas generator 1 to input the inert gas into the fire extinguishing agent injection assembly 3, the first pressure detector 4 detects the pressure inside the fire extinguishing agent injection assembly 3 in real time and sends it to the controller 6. The controller 6 compares the pressure detected by the first pressure detector 4 with the first preset pressure value. If the pressure inside the fire extinguishing agent injection assembly 3 reaches the first preset pressure value, the throttle valve 5 is controlled to open the working mode, so that a part of the inert gas in the first delivery pipeline 2 can be released to the outside atmosphere (or other containers) to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly 3, and avoid the situation where the pressure inside the fire extinguishing agent injection assembly 3 and the first delivery pipeline 2 suddenly decreases, causing the inert gas generator 1 to be forced to shut down, so that the inert gas generator 1 is always in a stable gas transmission state, so as to provide continuous and safe inert gas output for the injection of fire extinguishing agent (the fire extinguishing agent in this embodiment includes but is not limited to various types of powders such as ultrafine dry powder, ordinary dry powder, cement powder, etc.) in subsequent fire extinguishing operations.

[0051] In one embodiment of the present invention, the controller 6 is further configured to perform the following steps:

[0052] Step S201: after the throttle valve 5 is turned on in the working mode, determining that the pressure inside the fire extinguishing agent spraying assembly 3 reaches a second preset pressure value;

[0053] Step S202: Control the fire extinguishing agent spraying assembly 3 to perform fire extinguishing operations;

[0054] Step S203: Control the throttle valve 5 to close the working mode.

[0055] Specifically, the fire extinguishing agent injection assembly 3 includes a fire extinguishing agent holding tank 301 and an injection member 304 for injecting the fire extinguishing agent. The first pressure detector 4 is arranged on the fire extinguishing agent holding tank 301 to detect the pressure inside the fire extinguishing agent holding tank 301. After the controller 6 controls the throttle valve 5 to release part of the inert gas in the first delivery pipeline 2, the first pressure detector 4 continuously detects the pressure inside the fire extinguishing agent injection assembly 3 in real time and sends it to the controller 6. The controller 6 compares the pressure detected by the first pressure detector 4 with the second preset pressure value. If the pressure inside the fire extinguishing agent injection assembly 3 reaches the second preset pressure value, it means that the pressure inside the fire extinguishing agent holding tank 301 meets the injection condition of the fire extinguishing agent. Then, the fire extinguishing agent injection assembly 3 is controlled to perform the fire extinguishing operation (i.e., the fire extinguishing agent is injected outward through the injection member 304). At this time, the pressure inside the fire extinguishing agent injection assembly 3 and the first delivery pipeline 2 will continue to decrease. Therefore, it is no longer necessary to release part of the inert gas in the first delivery pipeline 2 through the throttle valve 5. The controller 6 controls the throttle valve 5 to close the working mode.

[0056] In one embodiment of the present invention, the fire extinguishing system further includes a second pressure detector 7 and a flow detector 8 both disposed on the first delivery pipeline 2 and in communication with the controller 6. The controller 6 is further configured to perform the following steps:

[0057] Step S301: after determining that the fire extinguishing agent injection assembly 3 performs a fire extinguishing operation, obtaining a first detection value of the second pressure detector 7 and a second detection value of the flow detector 8;

[0058] Step S302: Determine that the first detection value is not within a first preset range and / or the second detection value is not within a second preset range;

[0059] Step S303: adjusting the inert gas generator 1 according to the first detection value and / or the second detection value, so that the first detection value is within a first preset range and the second detection value is within a second preset range.

[0060] Specifically, the second pressure detector 7 is used to detect the pressure of the inert gas in the first delivery pipeline 2 (i.e., the first detection value) in real time, and send the above detection result to the controller 6 after the detection is completed; the flow detector 8 is used to detect the flow of the inert gas in the first delivery pipeline 2 (i.e., the second detection value) in real time, and send the above detection result to the controller 6 after the detection is completed; the first preset range and the second preset range are pre-stored in the controller 6 and can be called out when needed.

[0061] After the fire extinguishing agent injection assembly 3 performs the fire extinguishing operation, the controller 6 controls the second pressure detector 7 and the flow detector 8 to detect the pressure and flow of the inert gas in the first delivery pipeline 2. If it is determined according to the above two detection results that the first detection value is not within the first preset range and / or the second detection value is not within the second preset range, it means that the pressure and / or flow of the inert gas provided by the inert gas generator 1 cannot meet the fire extinguishing requirements. At this time, the controller 6 adjusts the inert gas generator 1 according to the first detection value and / or the second detection value obtained by the detection, that is, adjusts the inert gas output efficiency of the inert gas generator 1, so that the pressure and flow of the inert gas output to the first delivery pipeline 2 meet the fire extinguishing requirements, so as to provide the fire extinguishing agent injection assembly 3 with continuous and stable pressure and flow of inert gas.

[0062] In one embodiment of the present invention, the fire extinguishing system also includes a display device (not shown in the figure) connected to the controller 6, and the display device is a touch screen. The staff can adjust the first preset pressure value, and / or the second preset pressure value, and / or the first preset range and / or the second preset range through the display device to make the fire extinguishing system more in line with actual usage requirements.

[0063] In one embodiment of the present invention, the fire extinguishing agent injection assembly 3 includes a fire extinguishing agent storage tank 301, a second delivery pipeline 302, a first switch valve 303 and an injection member 304 for injecting the fire extinguishing agent, wherein the fire extinguishing agent storage tank 301 stores the fire extinguishing agent; the first pressure detector 4 is arranged on the fire extinguishing agent storage tank 301 to detect the pressure in the fire extinguishing agent storage tank 301; the outlet end of the first delivery pipeline 2 is connected to the inlet end of the fire extinguishing agent storage tank 301, and the outlet end of the fire extinguishing agent storage tank 301 is connected to the inlet end of the fire extinguishing agent storage tank 301 through the second delivery pipeline The delivery pipeline 302 is connected to the inlet end of the injection member 304, and the first switch valve 303 (the first switch valve 303 is a one-way ball valve) is arranged in the second delivery pipeline 302 and is communicated with the controller 6. The first switch valve 303 is used to open or close the second delivery pipeline 302. When performing a fire extinguishing operation, the controller 6 controls the first switch valve 303 to open, and the fire extinguishing agent in the fire extinguishing agent holding tank 301 enters the injection member 304 after passing through the second delivery pipeline 302, and is then sprayed out by the injection member 304 to achieve fire extinguishing.

[0064] In one embodiment of the present invention, Figure 2-Figure 3As shown, the throttle valve 5 includes a housing 502 with an airflow channel 501 formed therein and a switch assembly 503 for opening or closing the airflow channel 501, the airflow channel 501 is connected to the first delivery pipeline 2, and the switch assembly 503 is in communication connection with the controller 6. Specifically, one end of the airflow channel 501 is connected to the first delivery pipeline 2, and the other end of the airflow channel 501 is connected to the outside atmosphere (or other container); when part of the inert gas in the first delivery pipeline 2 needs to be released, the controller 6 controls the switch assembly 503 to open the airflow channel 501, so that part of the inert gas in the first delivery pipeline 2 is discharged into the outside atmosphere (or other container) through the airflow channel 501.

[0065] In one embodiment of the present invention, the throttle valve 5 also includes a baffle 504 and a first elastic blocking component 505. The baffle 504 is arranged in the air flow channel 501 and is used to separate the air flow channel 501 into a first branch 5011 and a second branch 5012. The interior of the shell 502 is also formed with a first installation cavity 506 located below the baffle 504. The first elastic blocking component 505 is arranged in the first installation cavity 506 and is used to connect the first branch 5011 and the second branch 5012 under the triggering action of the switch component 503. Specifically, the setting direction of the baffle 504 is consistent with the cross-sectional direction of the airflow channel 501, the width of the first installation cavity 506 is smaller than the length of the airflow channel 501, the lower end of the first elastic blocking component 505 abuts against the bottom wall of the first installation cavity 506, and the upper end of the first elastic blocking component 505 abuts against the lower end surface of the baffle 504. When the switch component 503 does not play a triggering role, the first elastic blocking component 505 is in an extended state, the first branch channel 5011 and the second branch channel 5012 are not connected, and part of the inert gas in the first delivery pipeline 2 cannot be discharged into the outside atmosphere (or other containers) through the throttle valve 5; when the switch component 503 plays a triggering role, the first elastic blocking component 505 is in a compressed state, the first branch channel 5011 and the second branch channel 5012 are connected, and part of the inert gas in the first delivery pipeline 2 can be discharged into the outside atmosphere (or other containers) through the throttle valve 5.

[0066] In one embodiment of the present invention, the first elastic blocking component 505 includes a first spring 5051 and a sealing plate 5052 vertically arranged in the first mounting cavity 506, the sealing plate 5052 is arranged above the first spring 5051 and is used to resist the lower end of the blocking plate 504, and the switch component 503 includes a power member 5031 communicated with the controller 6 and a push rod 5032 for applying pressure to the sealing plate 5052 when the power member 5031 performs a driving function. Specifically, the push rod 5032 is vertically arranged above the sealing pressing plate 5052 and can move up and down. When it is not necessary to release part of the inert gas in the first conveying pipeline 2, the controller 6 does not send a control instruction to the power member 5031. At this time, the first spring 5051 is in an extended state, the sealing pressing plate 5052 is abutted on the lower end surface of the baffle 504, and the first branch channel 5011 and the second branch channel 5012 are not connected; when it is necessary to release part of the inert gas in the first conveying pipeline 2, the controller 6 sends a control instruction to the power member 5031, the power member 5031 realizes the driving function, the push rod 5032 moves downward and applies pressure to the sealing pressing plate 5052, the first spring 5051 is compressed, the first branch channel 5011 and the second branch channel 5012 are connected, and part of the inert gas in the first conveying pipeline 2 can be discharged into the outside atmosphere (or other containers) through the air flow channel 501.

[0067] In one embodiment of the present invention, the switch assembly 503 further includes a pusher 5033 and a second spring 5034. The upper end of the pusher 5033 is drivingly connected to the power member 5031, and the lower end of the pusher 5033 is connected to the upper end of the second spring 5034. The lower end of the second spring 5034 is used to apply pressure to the push rod 5032. Specifically, in one embodiment, the power member 5031 is a driving motor. The upper end of the pusher 5033 is threadedly connected to the driving end of the power member 5031. When the power member 5031 performs the driving function, the pusher 5033 moves downward and squeezes the second spring 5034. The second spring 5034 presses the push rod 5032 downward, so that the push rod 5032 moves downward and applies pressure to the sealing pressing sheet 5052, thereby connecting the first branch channel 5011 and the second branch channel 5012. Alternatively, in other embodiments, the power member 5031 may also be an electric telescopic rod, a pneumatic telescopic rod or a hydraulic telescopic rod, and the upper end of the pusher 5033 is fixed to the telescopic end of the power member 5031 to achieve squeezing of the second spring 5034.

[0068] In one embodiment of the present invention, a second cavity 507 and a third cavity 508 located below the second cavity 507 are also formed inside the shell 502, an elastic diaphragm 509 is provided between the second cavity 507 and the third cavity 508, the air flow channel 501 is located below the third cavity 508, the lower end of the second spring 5034 abuts against the upper end surface of the elastic diaphragm 509, and the upper end of the push rod 5032 abuts against the lower end surface of the elastic diaphragm 509. Specifically, the third cavity 508 and the air flow channel 501 are separated by a blocking wall, and the push rod 5032 includes a sheet portion and a rod portion. The sheet portion rests on the lower end surface of the elastic diaphragm 509, the upper end of the rod portion is connected to the sheet portion, and the lower end of the rod portion passes through the blocking wall and rests on the sealing pressing plate 5052. When the pusher 5033 moves downward, the second spring 5034 presses the elastic diaphragm 509 downward, and the elastic diaphragm 509 transfers the pressure to the push rod 5032. The setting of the elastic diaphragm 509 increases the effective area of ​​the lower end of the second spring 5034 and the upper end of the push rod 5032, which can enhance the effect of force transmission and prevent the second spring 5034 from being distorted (or bent) under pressure and unable to apply vertical downward pressure to the push rod 5032.

[0069] Another embodiment of the present invention provides a new type of fire truck, which includes the fire extinguishing system for a fire truck in the above embodiment.

[0070] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fire extinguishing system for a fire truck, characterized in that: The fire extinguishing system comprises: An inert gas generator (1) for generating an inert gas; A first delivery pipeline (2), the inlet end of the first delivery pipeline (2) being connected to the outlet end of the inert gas generator (1); A fire extinguishing agent injection assembly (3), wherein the inlet end of the fire extinguishing agent injection assembly (3) is connected to the outlet end of the first delivery pipeline (2); A first pressure detector (4) for detecting the internal pressure of the fire extinguishing agent injection assembly (3); a throttle valve (5), connected to the first delivery pipeline (2) and capable of releasing a portion of the inert gas in the first delivery pipeline (2) to the outside atmosphere; A controller (6) is in communication with the first pressure detector (4) and the throttle valve (5) and is configured to: Controlling the inert gas generator (1) to input the inert gas into the fire extinguishing agent injection assembly (3); Determining that the pressure inside the fire extinguishing agent injection assembly (3) reaches a first preset pressure value; Controlling the throttle valve (5) to open a working mode so as to reduce the flow rate of the inert gas input into the fire extinguishing agent injection assembly (3); After the throttle valve (5) turns on the working mode, determining that the pressure inside the fire extinguishing agent injection assembly (3) reaches a second preset pressure value; Controlling the fire extinguishing agent injection assembly (3) to perform fire extinguishing operations; The throttle valve (5) is controlled to close the working mode.

2. The fire extinguishing system for a fire truck according to claim 1, characterized in that: The fire extinguishing system further comprises a second pressure detector (7) and a flow detector (8) both arranged on the first delivery pipeline (2) and in communication connection with the controller (6), and the controller (6) is further configured to: After determining that the fire extinguishing agent injection assembly (3) performs the fire extinguishing operation, obtaining a first detection value of the second pressure detector (7) and a second detection value of the flow detector (8); Determining that the first detection value is not within a first preset range and / or the second detection value is not within a second preset range; The inert gas generator (1) is adjusted according to the first detection value and / or the second detection value, so that the first detection value is within the first preset range and the second detection value is within the second preset range.

3. The fire extinguishing system for a fire truck according to claim 1, characterized in that: The fire extinguishing agent injection assembly (3) comprises a fire extinguishing agent storage tank (301), a second delivery pipeline (302), a first switch valve (303) and an injection member (304) for injecting the fire extinguishing agent, the first pressure detector (4) is arranged on the fire extinguishing agent storage tank (301), the outlet end of the first delivery pipeline (2) is connected to the inlet end of the fire extinguishing agent storage tank (301), the outlet end of the fire extinguishing agent storage tank (301) is connected to the inlet end of the injection member (304) via the second delivery pipeline (302), and the first switch valve (303) is arranged on the second delivery pipeline (302).

4. The fire extinguishing system for a fire truck according to any one of claims 1 to 3, characterized in that: The throttle valve (5) comprises a housing (502) having an air flow channel (501) formed therein and a switch assembly (503) for opening or closing the air flow channel (501); the air flow channel (501) is connected to the first delivery pipeline (2); and the switch assembly (503) is communicatively connected to a controller (6).

5. The fire extinguishing system for a fire truck according to claim 4, characterized in that: The throttle valve (5) further comprises a baffle (504) and a first elastic blocking component (505); the baffle (504) is arranged in the air flow channel (501) and is used to separate the air flow channel (501) into a first branch channel (5011) and a second branch channel (5012); a first installation cavity (506) located below the baffle (504) is also formed inside the housing (502); the first elastic blocking component (505) is arranged in the first installation cavity (506) and is used to connect the first branch channel (5011) and the second branch channel (5012) under the triggering action of the switch component (503).

6. The fire extinguishing system for a fire truck according to claim 5, characterized in that: The first elastic blocking component (505) includes a first spring (5051) and a sealing pressing plate (5052) vertically arranged in the first installation cavity (506); the sealing pressing plate (5052) is arranged above the first spring (5051) and is used to resist the lower end of the blocking plate (504); the switch component (503) includes a power member (5031) communicatively connected to the controller (6) and a push rod (5032) for applying pressure to the sealing pressing plate (5052) when the power member (5031) performs a driving function.

7. The fire extinguishing system for a fire truck according to claim 6, characterized in that: The switch assembly (503) also includes a push member (5033) and a second spring (5034), the upper end of the push member (5033) is drivingly connected to the power member (5031), the lower end of the push member (5033) is connected to the upper end of the second spring (5034), and the lower end of the second spring (5034) is used to apply pressure to the push rod (5032).

8. The fire extinguishing system for a fire truck according to claim 7, characterized in that: The shell (502) further comprises a second cavity (507) and a third cavity (508) located below the second cavity (507). An elastic diaphragm (509) is provided between the second cavity (507) and the third cavity (508). The air flow channel (501) is located below the third cavity (508). The lower end of the second spring (5034) abuts against the upper end surface of the elastic diaphragm (509), and the upper end of the push rod (5032) abuts against the lower end surface of the elastic diaphragm (509).

9. A fire truck, characterized in that: The fire truck comprises a fire extinguishing system for a fire truck according to any one of claims 1-8.

Images