Suspension type dry powder fire extinguishing device and fire extinguishing method

Abstract

The invention relates to the technical field of fire-fighting equipment, and provides a suspension type dry powder fire extinguishing device and a fire extinguishing method.The suspension type dry powder fire extinguishing device comprises a pressure-resistant container, an ignition mechanism, a first valve, a controller and a detector, and a containing cavity used for storing fire extinguishing dry powder is formed in the pressure-resistant container; a storage device for supplementing fire extinguishing dry powder is arranged on the pressure-resistant container; the plurality of ignition mechanisms are arranged at the top of the pressure-resistant container and are used for spraying the fire extinguishing dry powder in the accommodating cavity out of the pressure-resistant container after the ignition mechanisms are ignited; the first valve is arranged on the output pipe of the pressure container; the controller is electrically connected with the ignition mechanism and the first valve; the detector is used for feeding back fire extinguishing information to the controller and starting the ignition mechanism. The ignition mechanisms can be started at equal time intervals through the controller, and the effect of sequential ignition is achieved; or, the ignition mechanism can be started in order through continuous detection of the detector, so that continuous spraying of the fire extinguishing dry powder and high fire source restraining capacity are kept.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, specifically to a suspended dry powder fire extinguishing device and fire extinguishing method. Background Technology

[0002] Suspended dry powder fire extinguishing systems are a common type of fire-fighting equipment widely used in industrial, commercial, and transportation sectors, especially in locations where direct water supply is not feasible. This system controls fires by rapidly spraying dry powder extinguishing agents. The chemical inhibition and oxygen isolation properties of the dry powder effectively suppress the spread of fire.

[0003] Existing dry powder fire extinguishing devices are relatively simple in design, usually only equipped with a disposable gunpowder ignition device. After the gunpowder is ignited, the gas generated propels the dry powder extinguishing agent to spray. However, as the gas pressure gradually decreases, the spraying effect also gradually weakens, making it unable to effectively extinguish large fire sources or continuous fires. Summary of the Invention

[0004] One of the objectives of this invention is to provide a suspended dry powder fire extinguishing device to solve the problem that existing dry powder fire extinguishing devices are only one-time fire extinguishing actions and have poor fire extinguishing effects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A suspended dry powder fire extinguishing device, comprising: A pressure-resistant container having a cavity for storing fire extinguishing dry powder, and a storage device for replenishing the fire extinguishing dry powder in the cavity; The ignition mechanism is provided in multiple ways, and the multiple ignition mechanisms are located on the top of the pressure-resistant container, for spraying the fire extinguishing dry powder in the cavity out of the pressure-resistant container after the ignition mechanism is ignited. A first valve is provided on the output pipe of the pressure vessel; A controller, which is electrically connected to the ignition mechanism and the first valve; and The detector is used to provide fire extinguishing information to the controller and activate the ignition mechanism.

[0006] Preferably, the ignition mechanism includes a gunpowder chamber filled with gunpowder, a gas-generating chamber connected to the gunpowder chamber, and an electric ignition unit for igniting the gas-generating chamber, wherein the electric ignition unit is electrically connected to the controller.

[0007] Preferably, it further includes a first vibrator, which is disposed on the outer surface of the pressure vessel.

[0008] Preferably, a second valve is provided on the output tube of the memory, and the second valve is electrically connected to the controller; the memory is located above the pressure vessel.

[0009] Preferably, the memory is provided with a suspension part for suspending itself.

[0010] Preferably, the bottom of the memory and the pressure-resistant container is a conical structure.

[0011] Preferably, the pressure vessel is provided with a splashing disk for spreading the sprayed fire extinguishing dry powder in all directions, and a fixing arm that is spaced apart from the outlet of the pressure vessel, the fixing arm being disposed on the side wall of the pressure vessel.

[0012] Preferably, a second vibrator for vibrating itself is provided outside the memory, or the memory is rigidly connected to the pressure vessel.

[0013] Preferably, the pressure-resistant container is provided with a placement cavity for accommodating the ignition mechanism, the bottom of the placement cavity is provided with a through hole communicating with the cavity, and a cover is provided on the through hole.

[0014] The second objective of this invention is to provide a fire extinguishing method to solve the problem of the poor effectiveness of existing fire extinguishing methods.

[0015] To achieve the above objectives, the present invention adopts the following technical solution: A fire extinguishing method uses the aforementioned suspended dry powder fire extinguishing device, wherein a controller sequentially activates multiple ignition mechanisms at equal time intervals to continuously spray the fire extinguishing dry powder; or, a detector continuously monitors the environment and dynamically adjusts the number of ignition mechanisms or the interval between activations based on the ambient temperature.

[0016] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: 1. In this invention, the suspended dry powder fire extinguishing device can activate the ignition mechanism at equal time intervals through the controller to form a sequential ignition effect; or, it can activate the ignition mechanism in an orderly manner through continuous detection by the detector, thereby maintaining the continuous spraying of fire extinguishing dry powder and a strong ability to suppress fire sources, avoiding the problem of insufficient fire extinguishing effect caused by the instantaneous release of airflow from a single ignition mechanism.

[0017] 2. The design of the memory in this invention allows for timely replenishment of fire extinguishing dry powder during or after fire extinguishing, ensuring the continued effectiveness of the device. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the suspended dry powder fire extinguishing device described in this invention; Figure 2 This is a cross-sectional view of the pressure-resistant container of the suspended dry powder fire extinguishing device described in this invention. Figure 3 This is a cross-sectional view of the ignition mechanism of the suspended dry powder fire extinguishing device described in this invention.

[0019] Explanation of reference numerals in the attached figures: 10. Pressure vessel; 101. First valve; 102. First vibrator; 103. Sputtering disc; 104. Fixing arm; 105. Placement cavity; 1051. Cover; 11. Memory; 111. Second valve; 112. Suspension part; 113. Second vibrator; 12. Ignition mechanism; 121. Gunpowder chamber; 122. Gas generation chamber; 123. Electric ignition unit; 13. Controller; 14. Detector. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0022] When an element is referred to as "fixed to," "set on," or "located on" another element, it can be directly on or indirectly on that other element. When an element is referred to as "connected to," it can be directly connected to or indirectly connected to that other element.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Example 1 Please refer to Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a suspended dry powder fire extinguishing device, including a pressure-resistant container 10, an ignition mechanism 12, a first valve 101, a controller 13, and a detector 14. The pressure-resistant container 10 has a cavity for storing fire extinguishing dry powder, and a memory 11 for replenishing the cavity with fire extinguishing dry powder is provided on the pressure-resistant container 10. Multiple ignition mechanisms 12 are provided, located at the top of the pressure-resistant container 10, and are used to spray the fire extinguishing dry powder from the cavity out of the pressure-resistant container 10 after ignition by the ignition mechanism 12. The first valve 101 is located on the output pipe of the pressure-resistant container 10. The controller 13 is electrically connected to the ignition mechanism 12 and the first valve 101. The first valve 101 can be a solenoid valve, and the controller 13 can be a microcontroller, PLC, or chip, such as an STM32 microcontroller. The detector 14 is used to provide fire extinguishing information to the controller 13 and activate the ignition mechanism 12.

[0025] Specifically, detector 14 can be an SR-505 temperature alarm, which measures the ambient temperature in real time through a sensor. When the temperature exceeds a preset threshold, detector 14 immediately transmits a signal to controller 13 and triggers an alarm. After receiving the signal, controller 13 quickly opens the first valve 101 and starts the ignition mechanism 12.

[0026] In practical use, multiple ignition mechanisms 12 can be sequentially activated at equal time intervals via controller 13. It should be noted that the time interval is a calibrated value obtained through detection. By monitoring the pressure change at the nozzle during the spraying of the extinguishing dry powder, the pressure data is collected and plotted as a curve. The time points of significant change in the curve are extracted to determine the location of a significant pressure drop. This experiment is repeated, and the average time difference of a significant pressure drop is calculated from multiple spraying experiments to obtain the calibrated value of the time interval. After ignition, the ignition mechanism 12 releases airflow. Driven by the airflow, the extinguishing dry powder in the cavity is sprayed out through the output pipe of the pressure-resistant container 10. Because the ignition times of the multiple ignition mechanisms 12 are spaced apart, the airflow can be released in stages, keeping the air pressure relatively constant. This ensures continuous spraying of the extinguishing dry powder and a strong ability to suppress fire sources, avoiding the problem of insufficient extinguishing effect caused by the instantaneous release of airflow from a single ignition mechanism.

[0027] Alternatively, the number or interval of ignition mechanisms 12 can be dynamically adjusted based on the ambient temperature through continuous detection by detector 14, ensuring that the spray intensity of the extinguishing dry powder matches the scale of the fire. For example, when detector 14 detects that the temperature exceeds a preset threshold, controller 13 activates one ignition mechanism 12 to initially suppress the fire; if the temperature continues to rise, controller 13 will activate more ignition mechanisms 12 sequentially, shortening the interval time, increasing the spray intensity, and improving the extinguishing effect.

[0028] During ignition, after the current ignition mechanism 12 is ignited, the next target ignition mechanism 12 is the ignition mechanism 12 that is furthest from the current ignition mechanism 12 and has not yet been ignited. If there are multiple target ignition mechanisms 12, one is randomly selected. When an ignition mechanism 12 is ignited, the extinguishing dry powder in its corresponding area is sprayed and consumed. The distribution of extinguishing dry powder in the adjacent area is easily affected by it, while the area corresponding to the ignition mechanism 12 furthest from it is easier to maintain a sufficient distribution of extinguishing dry powder. At the same time, under this mechanism, it is beneficial to promote the flow of extinguishing dry powder in the pressure vessel 10, ensuring smooth spraying and extinguishing effect.

[0029] Meanwhile, the design of the memory 11 allows for timely replenishment of fire extinguishing dry powder during or after fire extinguishing, ensuring the continued effectiveness of the device.

[0030] like Figure 2 and Figure 3 As shown, in this embodiment, the ignition mechanism 12 includes a gunpowder chamber 121 filled with gunpowder, a gas-generating chamber 122 connected to the gunpowder chamber 121, and an electric ignition unit 123 for igniting the gas-generating chamber 122. The electric ignition unit 123 is electrically connected to the controller 13.

[0031] Specifically, the electric ignition unit 123 can be a semiconductor igniter or a bridge wire (such as a thin metal wire), which can convert the input electrical energy into heat energy to trigger subsequent reactions. The gas-generating chamber 122 contains a gas-generating agent (such as a nitro compound, pyrotechnic agent, etc.), which can instantly release a large amount of high-temperature gas and heat under the high-temperature triggering provided by the electric ignition unit 123, while generating high pressure. The high-temperature and high-pressure gas is then transferred to the gunpowder chamber 121 to ignite the gunpowder and complete the ignition. The airflow generated by the gunpowder combustion rapidly propels the extinguishing dry powder spray to form an effective fire extinguishing coverage.

[0032] like Figure 1 As shown, this embodiment also includes a first vibrator 102, which is disposed on the outer surface of the pressure vessel 10. The first vibrator 102 can be an ultrasonic vibrator, such as an MR-1200Z ultrasonic vibrating box. By applying high-frequency vibration to the outer surface of the pressure vessel 10, the flowability of the fire extinguishing dry powder inside the pressure vessel 10 is promoted, preventing the dry powder from clumping, ensuring smooth spraying and fire extinguishing effect.

[0033] like Figure 1 As shown, in this embodiment, a second valve 111 is provided on the output tube of the memory 11. The second valve 111 can be a solenoid valve, and the second valve 111 is electrically connected to the controller 13. The memory 11 is located above the pressure vessel 10. During or after fire extinguishing, the second valve 111 can be opened by the controller 13 to replenish the fire extinguishing dry powder in the memory 11 into the pressure vessel 10, maintaining a sufficient supply of fire extinguishing dry powder.

[0034] like Figure 1 As shown, in this embodiment, the memory 11 is provided with a suspension part 112 for suspending itself. The suspension part 112 can be used to fix the suspended dry powder fire extinguishing device in the area that needs protection, such as the top of a warehouse.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the bottom of the memory 11 and the pressure container 10 are conical structures. The conical structure design helps the fire extinguishing dry powder to be output from the output pipe, reduces the residue of dry powder in the container, and avoids clogging of dry powder during the output process, thereby improving the spraying efficiency.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, the pressure container 10 is provided with a splashing disk 103 for spreading the sprayed fire extinguishing dry powder in all directions, and a fixing arm 104 that is arranged at intervals between the splashing disk 103 and the outlet of the pressure container 10. The fixing arm 104 is provided on the side wall of the pressure container 10.

[0037] Specifically, the splashing disk 103 has an umbrella-shaped structure, which can effectively disperse the direction of dry powder spray and expand the coverage area. The fixing arm 104 can ensure the stability of the splashing disk 103 and prevent deviation during spraying. The synergistic effect of the splashing disk 103 and the fixing arm 104 makes the fire extinguishing dry powder form a uniform and wide coverage surface during spraying, significantly improving fire extinguishing efficiency and coverage range.

[0038] like Figure 1 As shown, in this embodiment, a second vibrator 113 for vibrating itself is provided outside the memory 11, or the memory 11 is rigidly connected to the pressure container 10.

[0039] Specifically, the second vibrator 113 can be an ultrasonic vibrator, which can be set on the outer surface of the storage container 11. It can further optimize the flowability of dry powder through high-frequency vibration, ensure that the dry powder does not clump in the storage container 11, and improve the immediacy and uniformity of spraying. Alternatively, the storage container 11 can be rigidly connected to the pressure container 10 to form an integral structure. Under the action of the first vibrator 102, the storage container 11 and the pressure container 10 vibrate synchronously.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the pressure-resistant container 10 is provided with a placement cavity 105 for accommodating the ignition mechanism 12. The bottom of the placement cavity 105 is provided with a through hole communicating with the cavity, and a baffle 1051 is provided on the through hole. After the ignition mechanism 12 is ignited, the airflow generated rushes open the baffle 1051, enters the cavity through the through hole, and pushes the fire extinguishing dry powder to be sprayed rapidly.

[0041] Example 2 This embodiment provides a fire extinguishing method using a suspended dry powder fire extinguishing device as described in Embodiment 1. The controller 13 sequentially activates multiple ignition mechanisms 12 at equal time intervals, ensuring continuous spraying of the extinguishing dry powder. The time intervals are calibrated values ​​obtained from detection. Because the ignition times of the multiple ignition mechanisms 12 are spaced apart, the airflow can be released in stages, maintaining a relatively constant air pressure. This ensures continuous spraying of the extinguishing dry powder and a strong ability to suppress fire sources, avoiding the problem of insufficient fire extinguishing effect caused by the instantaneous release of airflow from a single ignition mechanism 12.

[0042] Alternatively, the detector 14 can continuously monitor the environment and dynamically adjust the number or interval of activation of the ignition mechanism 12 according to the ambient temperature to ensure that the spraying force of the extinguishing dry powder matches the scale of the fire, thereby improving the extinguishing effect.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A suspended dry powder fire extinguishing device, characterized in that, include: A pressure-resistant container having a cavity for storing fire extinguishing dry powder, and a storage device for replenishing the fire extinguishing dry powder in the cavity; The ignition mechanism is provided in multiple ways, and the multiple ignition mechanisms are located on the top of the pressure-resistant container, for spraying the fire extinguishing dry powder in the cavity out of the pressure-resistant container after the ignition mechanism is ignited. A first valve is provided on the output pipe of the pressure vessel; A controller, which is electrically connected to the ignition mechanism and the first valve; and The detector is used to provide fire extinguishing information to the controller and activate the ignition mechanism.

2. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: The ignition mechanism includes a gunpowder chamber filled with gunpowder, a gas-generating chamber connected to the gunpowder chamber, and an electric ignition unit for igniting the gas-generating chamber. The electric ignition unit is electrically connected to the controller.

3. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: It also includes a first vibrator, which is disposed on the outer surface of the pressure vessel.

4. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: A second valve is provided on the output tube of the memory, and the second valve is electrically connected to the controller; the memory is located above the pressure vessel.

5. The suspended dry powder fire extinguishing device according to claim 4, characterized in that: The memory is provided with a suspension part for suspending itself.

6. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: The bottom of both the memory and the pressure-resistant container has a conical structure.

7. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: The pressure vessel is provided with a splashing disk that diffuses the sprayed fire extinguishing dry powder in all directions, and a fixing arm that is spaced apart from the outlet of the pressure vessel, the fixing arm being disposed on the side wall of the pressure vessel.

8. The suspended dry powder fire extinguishing device according to claim 1 or 3, characterized in that: The memory is externally provided with a second vibrator for vibrating itself, or the memory is rigidly connected to the pressure vessel.

9. The suspended dry powder fire extinguishing device according to claim 1, characterized in that: The pressure-resistant container is provided with a placement cavity for accommodating the ignition mechanism. The bottom of the placement cavity is provided with a through hole communicating with the cavity, and a cover is provided on the through hole.

10. A fire extinguishing method, characterized in that, Fire extinguishing is performed using the suspended dry powder fire extinguishing device as described in any one of claims 1-9, wherein the controller executes the sequential activation of multiple ignition mechanisms at equal time intervals to continuously spray the fire extinguishing dry powder; or, the detector continuously monitors and dynamically adjusts the number of ignition mechanisms or the interval between activations based on the ambient temperature.

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