Intelligent control type venturi gas-liquid composite pulse automatic fire extinguishing device and control method

Abstract

The application discloses an intelligent regulation type Venturi gas-liquid composite pulse automatic fire extinguishing device and a control method, which comprises a Venturi gas-liquid mixing nozzle, a high-pressure gas storage bottle unit, an electromagnetic valve, a fire extinguishing agent storage unit, an azimuth regulation execution assembly, an intelligent monitoring and positioning module and a central control unit. The central control unit is configured to drive the azimuth regulation execution assembly to aim the outlet of the Venturi gas-liquid mixing nozzle at a fire source according to a monitoring signal of the intelligent monitoring and positioning module, and control the electromagnetic valve to be opened and closed in a short pulse mode to perform millisecond pulse spraying. The liquid in the fire extinguishing agent storage unit is automatically sucked and atomized by using the negative pressure generated by the nozzle throat during spraying to form a gas-liquid composite fire extinguishing medium. The fire extinguishing agent can be accurately guided to the root of the fire source, the generated gas-liquid composite medium has the rapid suffocation ability of gas and the high-efficiency cooling and anti-reignition ability of liquid, and the single spraying impact force is small.

Description

Technical Field

[0001] This invention relates to the field of fire protection equipment technology, and in particular to an intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device and its control method. Background Technology

[0002] In the field of fire protection equipment, especially for automatic fire extinguishing devices in enclosed and confined spaces such as power distribution cabinets, energy storage compartments, and precision instrument compartments, existing technologies mainly have the following types of solutions and their inherent defects: Traditional automatic fire suppression systems, such as fixed sprinkler or rotary sprinkler systems, mostly employ directional or total flooding spray. The spray direction of these systems is fixed and cannot be dynamically adjusted according to the actual location of the fire source, resulting in a large amount of extinguishing agent being sprayed into non-fire areas, leading to low extinguishing agent utilization. Meanwhile, while existing carbon dioxide (CO2) fire suppression systems can extinguish flames through asphyxiation, their cooling effect is poor, making it difficult to quickly reduce the temperature of the fire, resulting in weak resistance to reignition. Water-based fire suppression systems typically rely on external pressure pumps to provide spray power, making the overall system structure complex, manufacturing costs high, and reliability questionable in emergencies without external power supply, as well as posing significant maintenance challenges.

[0003] More importantly, the existing technologies mentioned above are relatively limited in their methods of generating extinguishing agents, being either purely gaseous (such as CO2) or purely liquid (such as water-based sprays). They cannot spontaneously form a composite extinguishing agent that combines the rapid asphyxiation of gas with the efficient cooling and anti-reignition capabilities of liquid without the need for an external power source (such as a booster pump or electricity). Furthermore, the spraying methods of existing technologies are mostly continuous sprays, which not only result in a serious waste of extinguishing agents, but the strong impact airflow or liquid flow generated can also easily disperse flames or cause secondary damage to fragile components inside precision electronic equipment.

[0004] Therefore, it is necessary to provide an intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device and control method to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent, controllable Venturi gas-liquid composite pulse automatic fire extinguishing device and control method, which aims to solve the technical problems of low extinguishing agent utilization, easy secondary damage to precision equipment, and inability to form a highly efficient composite extinguishing medium without an external power source, which are common in existing fire extinguishing devices. The device has a simple structure and is easy to maintain.

[0006] To achieve the above objectives, the present invention provides an intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device, comprising: A Venturi gas-liquid mixing nozzle, the Venturi gas-liquid mixing nozzle comprising an air inlet and a side liquid suction port; A high-pressure gas storage cylinder unit, wherein the high-pressure gas storage cylinder unit is connected to the gas inlet via a first pipeline; A solenoid valve, which is located on the second pipeline, is used to control the on / off state of high-pressure gas. The fire extinguishing agent storage unit is connected to the side suction port via a second pipeline; A directional control actuator is provided, the control end of which is connected to the Venturi gas-liquid mixing nozzle and is used to adjust the direction of the Venturi gas-liquid mixing nozzle in the horizontal and pitch directions so that its nozzle outlet is aligned with the fire source. An intelligent monitoring and positioning module is used to identify flame signals and determine the spatial location of the fire source in real time. The central control unit is electrically connected to the intelligent monitoring and positioning module, the orientation control and execution component, and the solenoid valve, respectively. The central control unit is configured to: drive the orientation control execution component to align the outlet of the Venturi gas-liquid mixing nozzle with the fire source based on the monitoring signal of the intelligent monitoring and positioning module, and control the solenoid valve to perform short-pulse opening and closing to execute millisecond-level pulse injection; during injection, the high-pressure gas in the high-pressure gas storage cylinder unit flows through the Venturi gas-liquid mixing nozzle, and automatically draws and atomizes the liquid in the extinguishing agent storage unit using the negative pressure generated at its throat to form a gas-liquid composite extinguishing medium.

[0007] In a preferred embodiment, the high-pressure gas storage cylinder unit is a carbon dioxide high-pressure storage cylinder with a rated working pressure of 5.5MPa-5.7MPa.

[0008] In a preferred embodiment, the Venturi gas-liquid mixing nozzle includes a converging section, a throat, and a diffuser section; the air inlet is located at the front end of the converging section, and the lateral liquid suction port is connected to the converging section; wherein, the diameter of the throat is 2.5mm-3.5mm, the diameter of the converging section is 5mm-7mm, the angle of the diffuser section is 8°-12°, and the equivalent diameter of the nozzle outlet of the Venturi gas-liquid mixing nozzle is 4mm.

[0009] In a preferred embodiment, the diameter of the throat is 3.0 mm.

[0010] In a preferred embodiment, the Venturi gas-liquid mixing nozzle, driven by high-pressure gas, has a gas-liquid mixing mass ratio of 3:1 to 7:1.

[0011] In a preferred embodiment, the single pulse injection time of the solenoid valve is 0.01s-0.1s; the central control unit is configured with a single pulse injection time of 0.05s, corresponding to a single high-pressure gas injection volume of 0.04kg-0.05kg, and a single extinguishing agent suction volume of 0.008kg-0.012kg.

[0012] In a preferred embodiment, the orientation control execution component includes a horizontal angular displacement motor and a vertical angular displacement motor; it also includes a horizontal angular displacement sensor for monitoring the operating status of the horizontal angular displacement motor and a vertical angular displacement sensor for monitoring the operating status of the vertical angular displacement motor.

[0013] In a preferred embodiment, the intelligent monitoring and positioning module includes one or more combinations of an infrared flame sensor, a thermal imaging sensor, or a temperature sensor.

[0014] In a preferred embodiment, the extinguishing agent storage unit is equipped with a liquid level sensor; the liquid level sensor is used to detect changes in the liquid level inside and transmit the signal to the central control unit for determining the remaining amount of extinguishing agent or triggering an alarm.

[0015] The present invention also provides a fire extinguishing control method, which is implemented based on the intelligent controllable gas-liquid composite pulse automatic fire extinguishing device described in any of the above embodiments, comprising: Step S10: The intelligent monitoring and positioning module collects environmental information in real time, identifies and locates the fire source; Step S20: The central control unit calculates the location of the fire source and drives the location control actuator to align the nozzle outlet of the Venturi gas-liquid mixing nozzle with the fire source. Step S30: The central control unit controls the solenoid valve to open, executing a single short pulse injection of 0.05s; Step S40: The high-pressure gas in the high-pressure gas storage cylinder unit flows through the Venturi gas-liquid mixing nozzle, forming a negative pressure at the throat, automatically drawing in and atomizing the extinguishing agent in the extinguishing agent storage unit to form a gas-liquid composite extinguishing medium for spraying. Step S50: After a single spray is completed, the solenoid valve closes, and steps S10-S40 are repeated until the fire is extinguished or the extinguishing agent in the extinguishing agent storage unit is exhausted.

[0016] The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device and control method provided by this invention have the following beneficial effects: (1) Through the collaboration of the intelligent monitoring and positioning module and the orientation control execution component, the extinguishing agent can be accurately guided to the root of the fire source, which greatly improves the utilization rate and extinguishing efficiency, and avoids the waste caused by the blind spraying of traditional fixed systems. (2) Utilizing the unique pneumatic structure of the high-pressure gas storage cylinder unit and the Venturi gas-liquid mixing nozzle, no external power supply or hydraulic pump is required. The liquid extinguishing agent can be automatically drawn and finely atomized by the negative pressure generated by the high-pressure gas flowing through the Venturi throat. The system has a simplified structure and high reliability. The generated gas-liquid composite medium has both the rapid suffocation capability of gas and the efficient cooling and anti-reignition capability of liquid. (3) The central control unit controls the solenoid valve with millisecond-level short pulses to achieve "point-shot" rather than "continuous" spraying. The impact force of a single spray is small, which does not disturb precision equipment or blow away the flame, and is environmentally friendly to precision instrument chambers, etc. At the same time, through controllable multiple pulses, one bottle of fire extinguishing agent can deal with multiple fires or reignitions, which significantly improves the continuous operation capability and resource economy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The front view of the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device provided by the present invention; Figure 2 for Figure 1 The right view of the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device shown. Figure 3 for Figure 2 The image shows a cross-sectional view of the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device along direction AA. Figure 4 for Figure 1 The image shows a front view of the Venturi-type gas-liquid hybrid pulse automatic fire extinguishing device with intelligent controllable Venturi gas-liquid mixing nozzle. Figure 5 for Figure 4 The BB-direction cross-sectional view of the Venturi gas-liquid mixing nozzle shown; Figure 6 A block diagram of the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device provided by the present invention.

[0019] The diagram shows: 1. Intelligent monitoring and positioning module; 11. Horizontal angle infrared sensor; 12. Vertical angle infrared sensor; 13. Battery remaining power sensor. 2. Central control unit; 21. Wireless data transmission unit; 3. Orientation control actuation component; 31. Horizontal angular displacement motor; 32. Vertical angular displacement motor; 33. Horizontal rotation mechanism; 34. Horizontal angular displacement sensor; 35. Vertical angular displacement sensor; 4. Venturi-type gas-liquid mixing nozzle; 41. Air inlet; 42. Lateral liquid suction port; 43. Contraction section; 44. Throat; 45. Nozzle outlet; 46. Diffusion section; 47. Pressurization pipe; 5. High-pressure gas storage cylinder unit; 51. First pipeline; 6. Extinguishing agent storage unit; 61. Second pipeline; 62. Liquid level sensor; 7. Solenoid valve. Detailed Implementation

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

[0021] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0023] In an embodiment of the present invention, an intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device is provided. By integrating intelligent monitoring, automatic orientation control, Venturi self-priming gas-liquid mixing and millisecond-level short pulse injection technology, it achieves accurate, rapid and low-damage delivery of extinguishing agent to the fire source, and significantly improves fire extinguishing efficiency and anti-reignition capability. At the same time, it simplifies the system structure and improves its deployment reliability and safety in confined and complex environments.

[0024] like Figures 1-6 As shown, the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device includes: an intelligent monitoring and positioning module 1, a central control unit 2, an orientation control execution component 3, a Venturi gas-liquid mixing nozzle 4, a high-pressure gas storage cylinder unit 5, a fire extinguishing agent storage unit 6, and a solenoid valve 7.

[0025] Among them, combined Figure 4 and Figure 5As shown, the Venturi-type gas-liquid mixing nozzle 4 is a key component for achieving gas-liquid composite fire extinguishing, including an air inlet 41, a side liquid suction port 42, a contraction section 43, a throat 44, a nozzle outlet 45, and a diffuser section 46.

[0026] The high-pressure gas storage cylinder unit 5 is connected to the air inlet 41 via the first pipeline 51 to provide driving high-pressure gas. In this embodiment, the high-pressure gas storage cylinder unit 5 is preferably a carbon dioxide (CO2) high-pressure storage cylinder with a filling capacity of 2 kg and a rated working pressure set between 5.5 MPa and 5.7 MPa, for example, preferably 5.6 MPa. This pressure range ensures both sufficient driving gas flow and long-term safety of the storage cylinder and the entire high-pressure pipeline system.

[0027] The extinguishing agent storage unit 6 is used to store liquid extinguishing agents, such as water-based extinguishing agents and special electrical fire extinguishing agents. The extinguishing agent storage unit 6 is connected to the side suction port 42 of the Venturi gas-liquid mixing nozzle 4 via a second pipeline 61. Furthermore, to monitor the remaining amount of extinguishing agent in the storage unit in real time, a liquid level sensor 62 is installed inside the extinguishing agent storage unit 6. This liquid level sensor 62 can detect changes in the internal liquid level in real time and transmit the liquid level signal to the central control unit 2 to determine the remaining amount of extinguishing agent or trigger a low liquid level alarm, thereby ensuring that the device is always in a usable standby state.

[0028] The solenoid valve 7 is installed on the first pipeline 51, specifically between the high-pressure gas storage cylinder unit 5 and the air inlet 41 of the Venturi gas-liquid mixing nozzle 4. Its control end is electrically connected to the central control unit 2 and is used to control the on and off of the high-pressure gas at high speed and with precision according to the instructions of the central control unit 2, so as to achieve short pulse injection.

[0029] The intelligent monitoring and positioning module 1 is used to identify flame signals in real time and determine the spatial location of the fire source. In this embodiment, to achieve precise three-dimensional positioning of the fire source, the intelligent monitoring and positioning module 1 includes one or more combinations of infrared flame sensors, thermal imaging sensors, or temperature sensors. In an exemplary embodiment, the intelligent monitoring and positioning module 1 includes a set of horizontal angle infrared sensors 11 and a vertical angle infrared sensor 12. The horizontal angle infrared sensor 11 consists of multiple infrared sensors arranged at a certain angle, used to scan and determine the azimuth angle of the fire source in the horizontal direction; the vertical angle infrared sensor 12 is used to determine the pitch angle of the fire source in the vertical direction. Therefore, by fusing the data from the two sensors, the three-dimensional coordinates of the fire source relative to the device can be calculated. It should be noted that this calculation method can refer to the prior art, and the present invention is not limited thereto.

[0030] Combination Figure 6As shown, the central control unit 2 is the control center of the entire device. For example, the central control unit 2 can use an embedded industrial control unit of model STM32F407, which has powerful data processing capabilities and rich peripheral interfaces, and stable and reliable performance. The central control unit 2 is electrically connected to the intelligent monitoring and positioning module 1 (i.e., the horizontal angle infrared sensor 11 and the vertical angle infrared sensor 12), the orientation control execution component 3, the solenoid valve 7, the liquid level sensor 62, and other status sensors (such as the battery remaining power sensor 13). The central control unit 2 is configured to: receive and process the signals from each sensor in real time; drive the orientation control execution component 3 to accurately align the outlet 45 of the Venturi gas-liquid mixing nozzle 4 with the fire source according to the fire source position calculated by the intelligent monitoring and positioning module 1; and after alignment, control the solenoid valve 7 to perform millisecond-level short pulse opening and closing to execute pulse injection. In addition, the central control unit 2 can also communicate remotely with external terminals through the wireless data transmission unit 21.

[0031] Among them, combined Figures 1-3 As shown, the orientation control actuator 3 is the "actuator" for achieving precise pointing. Its control end is fixedly connected to the housing of the Venturi gas-liquid mixing nozzle 4, and is used to adjust the pointing of the nozzle outlet 45 in the horizontal and pitch directions. Specifically, the orientation control actuator 3 includes a horizontal angular displacement motor 31 and a vertical angular displacement motor 32. The horizontal angular displacement motor 31 drives a horizontal rotation mechanism 33 to achieve 360° rotation of the Venturi gas-liquid mixing nozzle 4 in the horizontal direction without dead angles. The vertical angular displacement motor 32 drives the horizontal angular displacement motor 31, the horizontal rotation mechanism 33, and the Venturi gas-liquid mixing nozzle 4 to perform synchronous pitch adjustment in the vertical direction, with an adjustment range of ±90°.

[0032] Furthermore, to form a closed-loop control and ensure pointing accuracy, the orientation control actuator 3 also includes a horizontal angular displacement sensor 34 for monitoring the operating status (i.e., actual rotation angle) of the horizontal angular displacement motor 31, and a vertical angular displacement sensor 35 for monitoring the operating status of the vertical angular displacement motor 32. These displacement sensors feed back the actual position of the motors to the central control unit 2 in real time, and the central control unit 2 makes drive corrections accordingly to ensure that the nozzle outlet 45 can be aligned with the center of the fire source with high precision.

[0033] It should be noted that the Venturi-type gas-liquid mixing nozzle 4 is the core component for realizing self-priming gas-liquid mixing. Its internal flow channel structure consists of three parts: a constriction section 43, a throat 44, and a diffuser section 46. The air inlet 41 is located at the front end of the constriction section 43, while the lateral liquid suction port 42 is precisely opened on the pipe wall of the constriction section 43 and communicates with the internal flow channel of the constriction section 43.

[0034] Regarding structural parameters, after extensive experimental optimization, this embodiment adopts the following preferred dimensions: the inlet diameter of the contraction section 43 is 5mm-7mm, preferably 6mm in this embodiment; the diameter of the throat 44 is 2.5mm-3.5mm, further preferably 3.0mm in this embodiment; the diffusion angle of the diffuser section 46 is 8°-12°, preferably 10° in this embodiment; and the equivalent diameter of the nozzle outlet 45 of the Venturi gas-liquid mixing nozzle 4 is 4mm. These dimensional parameters work together to determine the negative pressure, mixing efficiency, and jet range. Furthermore, to increase the pressure of the gas entering the contraction section 43, a pressurization pipe 47 is also connected to the inlet of the contraction section 43.

[0035] The working principle of this device is as follows: When the central control unit 2 opens the solenoid valve 7, high-pressure CO2 gas with a pressure of 5.6 MPa in the high-pressure gas storage cylinder unit 5 is injected at high speed into the converging section 43 of the Venturi gas-liquid mixing nozzle 4 through the first pipeline 51 and the air inlet 41. As the cross-sectional area of ​​the converging section 43 gradually decreases, according to the fluid continuity equation and Bernoulli's principle, the airflow velocity will increase sharply, while the pressure will decrease sharply. When the airflow reaches the throat 44 with a diameter of only 3.0 mm, its velocity reaches its maximum and its pressure drops to its minimum, thus forming a strong negative pressure zone in the throat 44 and the upstream converging section 43. This negative pressure acts on the extinguishing agent storage unit 6 through the lateral suction port 42 and the second pipeline 61, automatically drawing up the internal liquid extinguishing agent. The drawn-up liquid is instantly torn and broken into extremely small droplets under the strong impact and shearing action of the high-speed airflow, forming a fine water mist. Subsequently, the gas-liquid two-phase mixture enters the diffusion section 46. As the cross-sectional area of ​​the flow channel gradually expands, the flow velocity decreases and the pressure rises, further promoting the uniform mixing of the gas and liquid phases. Finally, it is ejected from the nozzle outlet 45 in the form of a gas-liquid composite fine water mist with a certain velocity and coverage. Throughout the process, the mass ratio of the gas-liquid mixture is stably controlled between 3:1 and 7:1. In this embodiment, 5:1 is preferred. At this ratio, the asphyxiation effect of CO2 and the cooling and anti-reignition effects of the fine water mist achieve optimal synergy.

[0036] It should be noted that, in order to achieve low-damage, high-efficiency, and multi-point fire suppression, the central control unit 2 does not continuously open the solenoid valve 7, but rather uses short-pulse control. The duration of a single pulse injection is set between 0.01s and 0.1s. In this embodiment, the central control unit 2 is preferably configured with a single pulse injection time of 0.05s. Under this pulse width, after precise calculation and calibration, the corresponding single high-pressure CO2 injection amount is approximately 0.04kg-0.05kg (e.g., 0.045kg), and the amount of extinguishing agent drawn in a single instance by the resulting negative pressure is approximately 0.008kg-0.012kg (e.g., 0.010kg). This ensures that each 0.05s pulse constitutes a complete, efficient, and quantitative fire suppression unit.

[0037] Furthermore, based on the above-mentioned device, the present invention also provides a fire extinguishing control method, which is implemented based on the above-mentioned intelligent controllable gas-liquid composite pulse automatic fire extinguishing device. This method includes the following closed-loop operating steps S10-S50.

[0038] Step S10: After the system is powered on, the central control unit 2 continuously receives signals from the horizontal angle infrared sensor 11, the vertical angle infrared sensor 12, the liquid level sensor 62, and the battery remaining power sensor 13. When the horizontal angle infrared sensor 11 and the vertical angle infrared sensor 12 detect flame characteristic signals, the central control unit 2 immediately calculates the horizontal azimuth angle and vertical pitch angle of the fire source relative to the current zero position of the device, thus completing the identification and location of the fire source.

[0039] Step S20: Based on the calculated fire source location, the central control unit 2 first drives the horizontal angular displacement motor 31, which in turn drives the horizontal rotation mechanism 33 and the Venturi gas-liquid mixing nozzle 4 thereon to rotate rapidly to the horizontal direction of the fire source; simultaneously, it drives the vertical angular displacement motor 32 to adjust the pitch angle of the Venturi gas-liquid mixing nozzle. During this process, the horizontal angular displacement sensor 34 and the vertical angular displacement sensor 35 feed back the motor position to the central control unit 2 in real time, forming a closed-loop control until the axis of the nozzle outlet 45 of the Venturi gas-liquid mixing nozzle 4 is precisely aligned with the center of the fire source.

[0040] Step S30: After confirming that the nozzle of the Venturi gas-liquid mixing nozzle 4 is aligned with the fire source, the central control unit 2 immediately sends an opening pulse signal with a width of 0.05s to the solenoid valve 7.

[0041] Step S40: The solenoid valve 7 responds and opens, and the high-pressure CO2 gas flows through the Venturi gas-liquid mixing nozzle 4. According to the Venturi principle, a strong negative pressure is formed at the throat 44, which automatically draws in and finely atomizes the extinguishing agent in the extinguishing agent storage unit 6, instantly forming a directional gas-liquid composite fine water mist, which is sprayed out at high speed from the nozzle outlet 45, accurately hitting the fire source, and achieving a composite extinguishing effect of suffocation, cooling and wetting at the same time.

[0042] Step S50: After the 0.05-second pulse ends, the activation signal from the central control unit 2 disappears, the solenoid valve 7 closes rapidly, and the single spray is completed. The system then immediately returns to step S10 to reassess the fire situation. If the fire source has been extinguished (no flame signal), the system enters standby monitoring mode; if the fire source still exists, the central control unit 2 will repeat steps S20-S40 to perform the next pulse spray. This cycle continues until the intelligent monitoring and positioning module 1 confirms the fire is extinguished, or the extinguishing agent in the extinguishing agent storage unit 6 is depleted (as determined by the signal from the level sensor 62).

[0043] Under the preferred parameters of this embodiment, a 2kg CO2 high-pressure storage cylinder, combined with approximately 0.7L of water-based extinguishing agent, is sufficient to support 30-40 short pulse sprays of 0.05s as described above. The effective coverage distance of each spray can reach 3.0m-3.8m, which is sufficient to meet the protection needs of most typical confined spaces such as power distribution cabinets, energy storage compartments, and precision instrument compartments.

[0044] In summary, the intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device and method disclosed in this invention have the following outstanding beneficial effects: (1) Through the coordinated work of the intelligent monitoring and positioning module 1 and the orientation control execution component 3, dynamic tracking and precise pointing of the fire source are realized, which completely changes the blind spraying mode of the traditional fixed nozzle and greatly improves the utilization rate of the extinguishing agent.

[0045] (2) The negative pressure generated by the high-pressure gas flowing through the Venturi nozzle 4 is used to draw and atomize the liquid extinguishing agent, completely eliminating the need for an external pressurization pump. The system structure is greatly simplified, the reliability is high, and it can spontaneously form a composite extinguishing medium that has the advantages of gas asphyxiation and liquid cooling / anti-reignition.

[0046] (3) The 0.05s millisecond short pulse jet method is adopted, which has a gentle impact force, does not disturb precision equipment or blow away the flame, and avoids secondary damage caused by continuous jetting; at the same time, the generated droplets are fine, non-conductive and have no residue, which is extremely friendly to electronic equipment and the environment.

[0047] (4) The liquid level sensor 62 and the battery remaining power sensor 13 are integrated, enabling the central control unit 2 to fully perceive the status of the device itself, realize low liquid level and low power warning, and ensure the availability and reliability of the device at any time.

[0048] (5) A single bottle of extinguishing agent (2kg CO2 and water-based liquid) can support 30-40 effective pulse sprays, which can not only deal with a single large fire, but also handle multiple small fires or continuously monitor the risk of reignition, significantly improving the continuous operation capability and resource economy.

[0049] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A smart, adjustable Venturi gas-liquid composite pulse automatic fire extinguishing device, characterized in that, include: A Venturi gas-liquid mixing nozzle, the Venturi gas-liquid mixing nozzle comprising an air inlet and a side liquid suction port; A high-pressure gas storage cylinder unit, wherein the high-pressure gas storage cylinder unit is connected to the gas inlet via a first pipeline; A solenoid valve, which is located on the second pipeline, is used to control the on / off state of high-pressure gas. The fire extinguishing agent storage unit is connected to the side suction port via a second pipeline; A directional control actuator is provided, the control end of which is connected to the Venturi gas-liquid mixing nozzle and is used to adjust the direction of the Venturi gas-liquid mixing nozzle in the horizontal and pitch directions so that its nozzle outlet is aligned with the fire source. An intelligent monitoring and positioning module is used to identify flame signals and determine the spatial location of the fire source in real time. The central control unit is electrically connected to the intelligent monitoring and positioning module, the orientation control and execution component, and the solenoid valve, respectively. The central control unit is configured to: drive the orientation control execution component to align the outlet of the Venturi gas-liquid mixing nozzle with the fire source based on the monitoring signal of the intelligent monitoring and positioning module, and control the solenoid valve to perform short-pulse opening and closing to execute millisecond-level pulse injection; during injection, the high-pressure gas in the high-pressure gas storage cylinder unit flows through the Venturi gas-liquid mixing nozzle, and automatically draws and atomizes the liquid in the extinguishing agent storage unit using the negative pressure generated at its throat to form a gas-liquid composite extinguishing medium.

2. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The high-pressure gas storage cylinder unit is a carbon dioxide high-pressure storage cylinder with a rated working pressure of 5.5MPa - 5.7MPa.

3. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The Venturi-type gas-liquid mixing nozzle includes a converging section, a throat, and a diffuser section; the air inlet is located at the front end of the converging section, and the lateral liquid suction port is connected to the converging section; wherein, the diameter of the throat is 2.5mm-3.5mm, the diameter of the converging section is 5mm-7mm, the angle of the diffuser section is 8°-12°, and the equivalent diameter of the nozzle outlet of the Venturi-type gas-liquid mixing nozzle is 4mm.

4. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 3, characterized in that, The diameter of the throat opening is 3.0 mm.

5. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The Venturi-type gas-liquid mixing nozzle, driven by high-pressure gas, achieves a gas-liquid mixing mass ratio of 3:1 to 7:

1.

6. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The solenoid valve has a single pulse injection time of 0.01s-0.1s; the central control unit is configured with a single pulse injection time of 0.05s, corresponding to a single high-pressure gas injection volume of 0.04kg-0.05kg, and a single extinguishing agent suction volume of 0.008kg-0.012kg.

7. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The orientation control execution component includes a horizontal angular displacement motor and a vertical angular displacement motor; it also includes a horizontal angular displacement sensor for monitoring the operating status of the horizontal angular displacement motor and a vertical angular displacement sensor for monitoring the operating status of the vertical angular displacement motor.

8. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The intelligent monitoring and positioning module includes one or more combinations of infrared flame sensors, thermal imaging sensors, or temperature sensors.

9. The intelligent controllable Venturi gas-liquid composite pulse automatic fire extinguishing device as described in claim 1, characterized in that, The fire extinguishing agent storage unit is equipped with a liquid level sensor; the liquid level sensor is used to detect changes in the liquid level inside and transmit the signal to the central control unit to determine the remaining amount of fire extinguishing agent or trigger an alarm.

10. A fire extinguishing control method, implemented based on the intelligent controllable gas-liquid composite pulse automatic fire extinguishing device according to any one of claims 1-9, characterized in that, include: Step S10: The intelligent monitoring and positioning module collects environmental information in real time, identifies and locates the fire source; Step S20: The central control unit calculates the location of the fire source and drives the location control actuator to align the nozzle outlet of the Venturi gas-liquid mixing nozzle with the fire source. Step S30: The central control unit controls the solenoid valve to open, executing a single short pulse injection of 0.05s; Step S40: The high-pressure gas in the high-pressure gas storage cylinder unit flows through the Venturi gas-liquid mixing nozzle, forming a negative pressure at the throat, automatically drawing in and atomizing the extinguishing agent in the extinguishing agent storage unit to form a gas-liquid composite extinguishing medium for spraying. Step S50: After a single spray is completed, the solenoid valve closes, and steps S10-S40 are repeated until the fire is extinguished or the extinguishing agent in the extinguishing agent storage unit is exhausted.

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