Multi-medium composite adjustable multi-resonant chamber fire-fighting nozzle and regulation method

Abstract

This invention provides a multi-media composite adjustable multi-resonant cavity indoor fire nozzle and its control method, relating to the field of nozzle technology. The nozzle includes a reversing valve, a cavity shell, a resonant cavity shell, an integrated shell frame, and an inlet medium control component. The first mounting end of the integrated shell frame is connected to the first mounting end of the cavity shell; the second mounting end of the integrated shell frame is connected to the internal connection end of the first resonant cavity shell; the outer wall of the second connection end of the first resonant cavity shell is connected to the internal connection end of the second resonant cavity shell; the outer wall of the second connection end of the second resonant cavity shell is connected to the internal connection end of the third resonant cavity shell; and the outer wall of the second connection end of the third resonant cavity shell is connected to the outlet end of the cavity shell. This invention identifies the fire situation using a multispectral imaging camera and controls the reversing valve based on pressure feedback to adjust the number of resonant cavities involved in the operation, achieving maximum jet impact force and multi-phase medium conversion, thereby improving the fire extinguishing rate and fire control effect.

Description

Technical Field

[0001] This invention relates to the field of nozzle technology, specifically to a multi-media composite adjustable multi-resonant cavity indoor fire nozzle and its control method. Background Technology

[0002] Fire nozzles are key components in indoor firefighting operations, playing a vital role in controlling fire and extinguishing flames. However, conventional fire nozzles use a single medium, have low impact force and poor cohesion, making it difficult to meet the needs of efficient fire suppression.

[0003] In existing literature, the multi-resonant cavity cavitation jet nozzle with publication number CN107051761A utilizes a multi-stage locking structure combined with multiple resonant cavities to efficiently generate a strong-scale cavitation effect, enhancing the cavitation jet's effectiveness. However, this nozzle uses a relatively single extinguishing medium, making it difficult to handle complex fire situations such as oil and electrical fires. Furthermore, the fixed number of resonant cavities results in poor structural control flexibility under actual operating conditions such as inlet pressure fluctuations and pressure reductions, hindering the stable maintenance of optimal jet impact efficiency. The hydraulically controlled fire monitor with publication number CN117379740A allows for adjustable jet intensity and switching of jet patterns, but its direct current jet effect is far inferior to pulsed jets. Its single-medium nature also makes it difficult to handle complex fire situations such as oil and electrical fires. Additionally, the large size of the fire monitor head limits its application to outdoor use, making it unsuitable for real-time sensing and intelligent analysis of fire conditions in complex indoor environments. It struggles to automatically and quickly adjust extinguishing strategies and equipment parameters based on fire type and scale, compromising extinguishing efficiency and effectiveness in complex fire situations.

[0004] Therefore, this invention addresses the problems of single media and poor polymerization degree in current indoor fire nozzles, and proposes a multi-media composite adjustable multi-resonant cavity indoor fire nozzle and control method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention aims to provide a multi-media composite adjustable multi-resonant cavity indoor fire nozzle and its control method. This method utilizes a multispectral imaging camera to collect real-time spectral characteristics of the fire, analyzes the fire type, and transmits data such as fire type and fire scale to a data processing module. It then adjusts the ratio of water and nitrogen-dry powder extinguishing media. Simultaneously, using high-pressure water as a power source, the number of participating resonant cavities and the length of each cavity are adjusted based on real-time water pressure monitoring, flexibly altering the jet characteristics. Four directional valves work in tandem to drive the chambers of a multi-stage annular hydraulic cylinder axially, indirectly adjusting the initial cavity length of the corresponding resonant cavities. Through the coordinated positioning of limit bolts, the number of resonant cavities can be adjusted in combination, allowing for on-demand adjustment of jet impact force and spray intensity to match the jet parameters required for the current fire situation. Ultimately, this achieves precise conversion between jet impact force and multi-phase media, effectively responding to various types of fires.

[0006] Specifically, on one hand, the present invention provides a multi-media composite adjustable multi-resonant cavity indoor fire nozzle, which includes a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a cavity shell, a first resonant cavity shell, a second resonant cavity shell, a third resonant cavity shell, an integrated shell frame, and an inlet medium control assembly. The inlet medium control assembly includes a water medium valve, a nitrogen dry powder particle valve, and a multi-inlet flow stabilizer. The multi-inlet flow stabilizer includes a nitrogen dry powder inlet, a water medium outlet, a first support flow stabilizer, and a second support flow stabilizer. The nitrogen dry powder inlet and the water medium outlet are coaxially arranged inside the multi-inlet flow stabilizer. The first support flow stabilizer and the second support flow stabilizer are both located inside the water medium outlet, and the first support flow stabilizer is located at the junction of the front end hole and the rear end hole of the water medium outlet, while the second support flow stabilizer is located at the tail end of the water medium outlet, thereby realizing coaxial stable flow input of multi-phase media. The multi-inlet current stabilizer is located inside the integrated housing frame, and its outlet end is connected to the outlet end of the integrated housing frame. The first mounting end of the integrated housing frame is connected to the first mounting end of the cavity shell. The second mounting end of the integrated housing frame is connected to the internal connection end of the first resonant cavity shell. The outer wall of the second connection end of the first resonant cavity shell is connected to the internal connection end of the second resonant cavity shell. The outer wall of the second connection end of the second resonant cavity shell is connected to the internal connection end of the third resonant cavity shell. The outer wall of the second connection end of the third resonant cavity shell is connected to the outlet end of the cavity shell. The first resonant cavity shell, the second resonant cavity shell, and the third resonant cavity shell are nested sequentially inside the integrated shell frame, forming three independent and series-connected resonant cavities. The space between the outer wall of the integrated shell frame and the interior of the first resonant cavity shell is the first resonant cavity. The space between the outer wall of the second connecting end of the first resonant cavity shell and the interior of the second resonant cavity shell is the second resonant cavity. The space between the outer wall of the second connecting end of the second resonant cavity shell and the interior of the third resonant cavity shell is the third resonant cavity. The three resonant cavities have different diameters and are nested within the finite axial length of the integrated shell frame. Different numbers of resonant cavities are matched according to the pressure at the water medium inlet to achieve the step-by-step enhancement of multi-stage pressure pulses.

[0007] Preferably, the space enclosed by the outer wall of the integrated housing frame, the interior of the cavity shell, and the first side of the first connecting end of the first resonant cavity housing is the left chamber of the multi-stage annular hydraulic cylinder; the space enclosed by the second side of the first connecting end of the first resonant cavity housing, the outer wall of the second connecting end of the first resonant cavity housing, the interior of the cavity shell, and the first side of the first connecting end of the second resonant cavity housing is the middle left chamber of the multi-stage annular hydraulic cylinder; the space enclosed by the second side of the first connecting end of the second resonant cavity housing, the outer wall of the second connecting end of the second resonant cavity housing, the interior of the cavity shell, and the first side of the first connecting end of the third resonant cavity housing is the middle right chamber of the multi-stage annular hydraulic cylinder; and the space enclosed by the second side of the first connecting end of the third resonant cavity housing, the outer wall of the second connecting end of the third resonant cavity housing, and the interior of the cavity shell is the right chamber of the multi-stage annular hydraulic cylinder.

[0008] Preferably, it also includes a data processing module, which is located between the outer wall of the multi-inlet flow stabilizer and the inner wall of the integrated housing frame, and the reversing valve is located in the groove of the outer wall of the integrated housing frame.

[0009] Preferably, in the multi-inlet flow stabilizer, the water medium inlet is a variable diameter conical orifice, consisting of a front end orifice and a rear end orifice, with a diameter ratio of 2:1 between the front end and the rear end orifice, and the nitrogen dry powder inlet is a constant diameter cylindrical orifice.

[0010] Preferably, it also includes a multispectral imaging camera, and the second mounting end of the cavity housing is connected to the multispectral imaging camera.

[0011] Preferably, the outer wall of the first connecting end of the first resonant cavity housing is connected to the first connecting end inside the cavity housing through a sealing ring, the outer wall of the first connecting end of the second resonant cavity housing is connected to the second connecting end inside the cavity housing through a sealing ring, and the outer wall of the first connecting end of the third resonant cavity housing is connected to the third connecting end inside the cavity housing through a sealing ring.

[0012] Preferably, the first fixed end of the first connecting end of the first resonant cavity housing is connected to the third mounting end of the integrated housing frame through a first limiting bolt, the first fixed end of the first connecting end of the second resonant cavity housing is connected to the second fixed end of the first connecting end of the first resonant cavity housing through a second limiting bolt, and the first fixed end of the first connecting end of the third resonant cavity housing is connected to the second fixed end of the first connecting end of the second resonant cavity housing through a third limiting bolt.

[0013] On the other hand, the present invention provides a method for controlling the above-mentioned multi-medium composite adjustable multi-resonant cavity indoor fire nozzle, specifically including the following steps: S1. In the initial state, the right position of the first reversing valve, the second reversing valve and the third reversing valve are energized, the left position of the fourth reversing valve is energized, the first resonant cavity, the second resonant cavity and the third resonant cavity are closed, and the multispectral imaging camera is activated. If the multispectral imaging camera detects a fire with a single combustion feature, proceed to S2. If the multispectral imaging camera detects a fire composed of two combustion features, proceed to S3. S2. If the multispectral imaging camera only detects solid combustion features, the data processing module opens the water medium valve and simultaneously adjusts the energization of the first, second, third, and fourth reversing valves according to the pressure feedback from the pressure sensor located at the water medium valve, thereby controlling the opening of different numbers of resonant cavities to ensure the final impact force; when the multispectral imaging camera only detects liquid or gas combustion features, the data processing module opens the nitrogen dry powder particle valve. S3. If the multispectral imaging camera simultaneously identifies combustion characteristics of solids and liquids or solids and gases, the ratio of water to nitrogen dry powder particles is adjusted according to the significance of the combustion characteristics of the solids, liquids, or gases. S4. Based on S2 or S3, if the multispectral imaging camera identifies the characteristics of solid, liquid or gas extinguishing in the fire, the data processing module closes the water medium valve and the nitrogen dry powder valve respectively, and controls the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve to restore the first resonant cavity, the second resonant cavity and the third resonant cavity to their initial state.

[0014] Preferably, the specific operation process of controlling the opening of different numbers of resonant cavities based on the energization of the pressure regulating reversing valve fed back by the pressure sensor is as follows: When the inlet pressure is less than or equal to 4 MPa, the left position of the first directional valve is energized, the second and third directional valves remain in the neutral position, and the right position of the fourth directional valve is energized. At this time, the first resonant cavity is open. When the inlet pressure is between 4 and 7 MPa, the left positions of the first and second directional valves are energized, the third directional valve remains in the neutral position, and the right position of the fourth directional valve is energized. At this time, the first and second resonant cavities are open. When the inlet pressure is greater than or equal to 7 MPa, the left positions of the first, second, and third directional valves are energized, and the right position of the fourth directional valve is energized. At this time, the first, second, and third resonant cavities are open.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention employs a multi-inlet coordinated spray structure, capable of simultaneously delivering three media: water, nitrogen, and dry powder particles. This invention not only broadens the applicability of the device, enabling it to efficiently handle various fire scenarios such as solid surface fires, liquid pool fires, and electrical fires, but also leverages the synergistic fire extinguishing mechanism of the three media—the cooling effect of water, the asphyxiating and isolating effect of nitrogen, and the chemical inhibition effect of dry powder particles—to enhance the fire extinguishing rate and fire control effect, resulting in superior fire extinguishing efficiency and scenario adaptability.

[0016] 2. This invention uses high-pressure water as a power source, and can flexibly adjust the number of resonant cavities participating in the jet and the length of each cavity without disassembly, replacement or additional addition of resonant cavities. It can accurately match parameters according to the actual water pressure conditions and fire type, thereby obtaining the optimal jet impact force and fire extinguishing effect.

[0017] 3. This invention has controllability characteristics. It collects fire data in real time through a multispectral imaging camera, analyzes the data through a data processing module to determine the fire type, and adjusts the ratio of the working medium by adjusting the water medium valve and the nitrogen-dry powder particle valve. The pressure sensor synchronously monitors the water pressure of the power source, and the monitored data is also transmitted to the data processing module to issue commands to the four reversing valves, thereby controlling the number and length of the resonant cavity and achieving rapid fire extinguishing.

[0018] 4. This invention employs a static sealing ring between the integrated housing frame and the cavity shell, and a sealing ring between the resonant cavity shells. This ensures high-pressure sealing while allowing each resonant cavity shell to generate necessary micro-movements or axial displacements under pulse pressure, avoiding stress concentration or sealing failure caused by rigid connections. The multi-inlet current stabilizer is built into the integrated housing frame, and the frame also serves as the connection hub between the cavity shell and the resonant cavity shell, reducing external pipelines and additional joints, resulting in a compact overall structure. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention; Figure 2 This is a schematic diagram of the operation of the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention without a resonant cavity; Figure 3 This is a schematic diagram of the operation of a single resonant cavity in the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention; Figure 4 This is a schematic diagram of the operation of the dual resonant cavity in the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention; Figure 5 This is a diagram showing the installation of the limiting bolts in the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention; Figure 6This is a schematic diagram of the multi-inlet flow stabilizer in the multi-medium composite adjustable multi-resonant cavity indoor fire nozzle of the present invention.

[0020] Key reference numerals: 101. First reversing valve; 102. Second reversing valve; 2. First static sealing ring; 3. First dynamic sealing ring; 4. Cavity shell; 5. Second dynamic sealing ring; 601. Sealing ring; 7. Third limiting bolt; 8. Third dynamic sealing ring; 9. Fourth dynamic sealing ring; 10. Third resonant cavity shell; 11. Multispectral imaging camera; 12. Second resonant cavity shell; 13. First resonant cavity shell; 14. Second limiting bolt; 15. Integrated shell frame; 103. Third reversing valve; 104. Fourth reversing valve; 16. Multi-inlet flow stabilizer; 1601. Nitrogen dry powder inlet; 1602. Water medium inlet; 1603. First support flow stabilizer; 1604. Second support flow stabilizer; 17. Second static sealing ring; 18. First limiting bolt; 19. Data processing module. Detailed Implementation

[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0022] This invention provides a multi-media composite adjustable multi-resonant cavity indoor fire nozzle. It precisely adjusts the water, nitrogen-dry powder ratio, and the number of resonant cavities according to the fire situation, adjusting the jet impact force and spray intensity as needed. Addressing the problems of conventional nozzles, such as a single extinguishing medium and fixed resonant cavity structure, this invention uses high-pressure water as a power source. A multispectral imaging camera 11 identifies the fire situation, and a data processing module 19 controls the water-nitrogen-dry powder mixing ratio in real time. Based on pressure feedback, it collaboratively controls multiple reversing valves, driving multi-stage annular hydraulic cylinders to adjust the number of resonant cavities, achieving maximum jet impact force and precise conversion between multi-phase media.

[0023] like Figure 1 As shown, a multi-media composite adjustable multi-resonant cavity indoor fire nozzle includes a first reversing valve 101, a second reversing valve 102, a third reversing valve 103, a fourth reversing valve 104, a cavity shell 4, a first resonant cavity shell 13, a second resonant cavity shell 12, a third resonant cavity shell 10, an integrated shell frame 15, and an inlet medium control assembly. Specifically, the inlet medium control assembly includes a water medium valve, a nitrogen dry powder particle valve, and a multi-inlet flow stabilizer 16. It also includes a first static sealing ring 2, a first dynamic sealing ring 3, a second dynamic sealing ring 5, a sealing ring 601, a third limiting bolt 7, a third dynamic sealing ring 8, a fourth dynamic sealing ring 9, a multispectral imaging camera 11, a second limiting bolt 14, a second static sealing ring 17, a first limiting bolt 18, a data processing module 19, and a control mechanism.

[0024] In a preferred embodiment of the present invention, the control mechanism is fixedly installed on the outside of the multi-inlet flow stabilizer 16, including a valve body bracket and switching valves. The switching valves are a water jet switching valve and a nitrogen dry powder particle switching valve, and are connected to the data processing module 19 via a data line to realize real-time transmission of control commands. The data processing module 19 is directly connected to the control mechanism components through a built-in data cable, and simultaneously establishes a signal transmission path with the multispectral imaging camera 11 sensing device through a through-hole, which ensures both the timeliness of data interaction and the protection of the cavity shell.

[0025] like Figure 6 As shown, the multi-inlet flow stabilizer 16 integrates the nitrogen dry powder inlet 1601, the water medium inlet 1602, the first support flow stabilizer 1603, and the second support flow stabilizer 1604 into one unit. The nitrogen dry powder inlet 1601 and the water medium inlet 1602 are concentrically nested, thus constructing a structure with internal and external dual flow channels. The water medium inlet 1602 is a variable-diameter conical orifice, with a larger diameter at the front end and a smaller diameter at the rear end along the fluid flow direction, and the diameter reduction ratio between the front and rear ends is 2:1. The nitrogen dry powder inlet 1601 is a constant-diameter cylindrical orifice, meaning that the diameter before and after the inlet remains consistent. Meanwhile, the water medium inlet 1602 is equipped with a first support flow stabilizer 1603 and a second support flow stabilizer 1604. The first support flow stabilizer 1603 and the second support flow stabilizer 1604 effectively modulate the originally turbulent and disordered water flow, transforming it into a stable and smooth water flow. The first support flow stabilizer 1603 is located at the junction of the front end hole and the rear end hole, and its function is to make initial adjustments to the turbulent water flow at the inlet. The second support flow stabilizer 1604 is located at the tail end inside the water medium inlet, and it undertakes the task of making secondary adjustments to the turbulent water flow. In addition to the water flow adjustment function, the first support flow stabilizer 1603 and the second support flow stabilizer 1604 also serve as a support structure, connecting and supporting the nitrogen dry powder inlet 1601 and the water medium inlet 1602, ensuring the stability of the multi-inlet flow stabilizer 16.

[0026] The multi-inlet flow stabilizer 16 is located inside the integrated housing frame 15. The outlet end of the multi-inlet flow stabilizer 16 is connected to the outlet end of the integrated housing frame 15 through the second static sealing ring 17. The data processing module 19 is located between the outer wall of the multi-inlet flow stabilizer 16 and the inner wall of the integrated housing frame 15. The first reversing valve 101, the second reversing valve 102, the third reversing valve 103 and the fourth reversing valve 104 are respectively located in the grooves of the outer wall of the integrated housing frame 15.

[0027] The first mounting end of the integrated housing frame 15 is connected to the first mounting end of the cavity shell 4 via the first static sealing ring 2. The second mounting end of the cavity shell 4 is connected to the multispectral imaging camera 11. The first resonant cavity shell 13, the second resonant cavity shell 12, and the third resonant cavity shell 10 are distributed sequentially from left to right inside the cavity shell 4. The outer wall of the first connecting end of the first resonant cavity shell 13 is connected to the first connecting end inside the cavity shell 4 via the sealing ring 601. The outer wall of the first connecting end of the second resonant cavity shell 12 is connected to the second connecting end inside the cavity shell 4 via the sealing ring 601. The third resonant cavity shell 10... The outer wall of the first connecting end is connected to the third connecting end inside the cavity shell 4 through the sealing ring 601. The second mounting end of the integrated shell frame 15 is connected to the inner connecting end of the first resonant cavity shell 13 through the first dynamic sealing ring 3. The outer wall of the second connecting end of the first resonant cavity shell 13 is connected to the inner connecting end of the second resonant cavity shell 12 through the second dynamic sealing ring 5. The outer wall of the second connecting end of the second resonant cavity shell 12 is connected to the inner connecting end of the third resonant cavity shell 10 through the third dynamic sealing ring 8. The outer wall of the second connecting end of the third resonant cavity shell 10 is connected to the outlet end of the cavity shell 4 through the fourth dynamic sealing ring 9.

[0028] like Figure 6 As shown, the first fixed end of the first connecting end of the first resonant cavity housing 13 is connected to the third mounting end of the integrated housing frame 15 via a first limiting bolt 18. The first fixed end of the first connecting end of the second resonant cavity housing 12 is connected to the second fixed end of the first connecting end of the first resonant cavity housing 13 via a second limiting bolt 14. The first fixed end of the first connecting end of the third resonant cavity housing 10 is connected to the second fixed end of the first connecting end of the second resonant cavity housing 12 via a third limiting bolt 7. The thickness of the screw head of the third limiting bolt 7 controls the minimum distance between the third resonant cavity housing 10 and the outer shell 4. The third limiting bolt 7 constrains the relative movement between the third resonant cavity housing 10 and the second resonant cavity housing 12. The second limiting bolt 14 constrains the relative movement between the first resonant cavity housing 13 and the second resonant cavity housing 12. The first limiting bolt 18 constrains the relative movement between the first resonant cavity housing 13 and the integrated housing frame 15.

[0029] exist Figure 1In this context, the space enclosed by the outer wall of the integrated housing frame 15, the interior of the cavity shell 4, and the first side of the first connecting end of the first resonant cavity shell 13 constitutes the left chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the outer wall of the integrated housing frame 15 and the interior of the first resonant cavity shell 13 constitutes the first resonant cavity. The space enclosed by the second side of the first connecting end of the first resonant cavity shell 13, the outer wall of the second connecting end of the first resonant cavity shell 13, the interior of the cavity shell 4, and the first side of the first connecting end of the second resonant cavity shell 12 constitutes the left chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the outer wall of the second connecting end of the first resonant cavity shell 13 and the first side of the first connecting end of the second resonant cavity shell 12 constitutes the left chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the interior of the second resonant cavity is the second resonant cavity. The space enclosed by the second side of the first connecting end of the second resonant cavity housing 12, the outer wall of the second connecting end of the second resonant cavity housing 12, the interior of the cavity shell 4, and the first side of the first connecting end of the third resonant cavity housing 10 is the right chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the outer wall of the second connecting end of the second resonant cavity housing 12 and the interior of the third resonant cavity housing 10 is the third resonant cavity. The space enclosed by the second side of the first connecting end of the third resonant cavity housing 10, the outer wall of the second connecting end of the third resonant cavity housing 10, and the interior of the cavity shell 4 is the right chamber of the multi-stage annular hydraulic cylinder.

[0030] Specifically, the first, second, and third resonant cavities are all annular cavity structures, connected by cavity channels. The chamfered corners at the outlets of each channel allow for tight contact with the inner wall of the next-level resonant cavity. All resonant cavities are arranged sequentially along the nozzle axis, and adjacent resonant cavities are sealed together using sealing rings. The three resonant cavities have different diameters, enabling them to generate different pulse frequencies under varying inlet pressures. By using them individually, in pairs, or simultaneously, the optimal striking frequency and striking force can be achieved for different inlet pressures.

[0031] The four sets of directional valves are respectively connected to the left chamber, the middle left chamber, the middle right chamber, and the right chamber of the multi-stage annular hydraulic cylinder. The four inlet positions are determined by the cavity structure and the limiting bolts, ensuring that the four chambers are not interconnected. Each set of directional valves is connected to its corresponding chamber via a high-pressure oil pipe. Figure 5 As shown, the movement distance between each chamber is limited by four evenly distributed limiting bolts. In this way, the number of resonant cavities participating in the operation and the cavity length of each resonant cavity can be switched.

[0032] The P ports of all four directional valves are connected to the high-pressure water flow from the power source, the T ports are all connected to the oil tank, and the A ports are connected to the left chamber, the middle left chamber, the middle right chamber, and the right chamber of the multi-stage annular hydraulic cylinder, respectively, to control the changes in the length of the three resonant cavities. Pressure sensors collect data on the power source pressure, and multispectral imaging camera 11 collects data on the fire scene and transmits it to the data processing, analysis, and control module. The data processing, analysis, and control module processes and analyzes the received data and controls the inlet switching valves and directional valves, thereby achieving precise control of the jet medium distribution and the number and length of the resonant cavities.

[0033] like Figure 1 As shown, in order to ensure the smooth movement and sealing of the nozzle device, the axes of the multi-inlet flow stabilizer 16, the first resonant cavity, the second resonant cavity, the third resonant cavity, the left chamber of the multi-stage annular hydraulic cylinder, the middle left chamber of the multi-stage annular hydraulic cylinder, the middle right chamber of the multi-stage annular hydraulic cylinder, and the right chamber of the multi-stage annular hydraulic cylinder are on the same axis.

[0034] like Figure 1 As shown, the control method of the multiphase composite multi-resonant cavity pulse cavitation nozzle device mainly has two aspects. First, the multispectral imaging camera 11 captures fire information in real time and transmits the information to the data processing module 19. The data processing module 19 automatically determines the required jet medium type and medium ratio based on the specific information such as the fire type and distance received. Then, it turns on the power source and the corresponding switch valve. The configured jet medium is connected from the multi-inlet flow stabilizer 16 and flows sequentially through the first resonant cavity, the internal channel of the first resonant cavity shell 13, the second resonant cavity, the internal channel of the second resonant cavity shell 12, the third resonant cavity, and the internal channel of the third resonant cavity shell 10, and is ejected from the outlet of the third resonant cavity shell 10. Secondly, the pressure sensor collects the pressure information of the power source and feeds it back to the data processing module 19. Based on the pressure data, the data processing module 19 dynamically adjusts the number and length of the resonant cavities involved in the operation. By controlling the high-pressure water flow from the high-pressure water source through the first reversing valve 101, the second reversing valve 102, the third reversing valve 103, and the fourth reversing valve 104 into the chamber of the multi-stage annular hydraulic cylinder, the module controls the extension and retraction of the first resonant cavity housing 13, the second resonant cavity housing 12, and the third resonant cavity housing 10, achieving precise control of the maximum impact force of the jet. The specific control process is as follows: S1. In the initial state, the right position of the first reversing valve 101, the second reversing valve 102 and the third reversing valve 103 are energized, the left position of the fourth reversing valve 104 is energized, the first resonant cavity, the second resonant cavity and the third resonant cavity are closed, and the multispectral imaging camera 11 is activated. If the multispectral imaging camera 11 detects a fire with a single combustion feature, then proceed to S2. If the multispectral imaging camera 11 detects a fire composed of two combustion features, then proceed to S3.

[0035] S2. When the multispectral imaging camera 11 detects solid combustion characteristics, namely the temperature field distribution of 600-1200K, the orange-red flame characteristics in the visible light band, and the obvious CO2 combustion radiation peak at 4.3μm in the mid-infrared, and simultaneously identifies the continuous hot smoke plume and 3-15Hz flame flicker characteristics unique to solid combustion, determining it to be a Class A solid combustible open flame condition, the data processing module 19 adjusts the water medium valve and nitrogen dry powder particle valve to adjust the ratio of water to nitrogen dry powder particles to 1:0. Simultaneously, based on the pressure feedback from the pressure sensor, it adjusts the energization of the reversing valve, thereby controlling the opening of different numbers of resonant cavities. The specific judgment process is as follows: When the inlet pressure is less than or equal to 4 MPa, the left position of the first directional valve 101 is energized, the second directional valve 102 and the third directional valve 103 remain in the neutral position, and the right position of the fourth directional valve 104 is energized. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder and flows out from the right chamber. The first resonant cavity housing 13 extends, and at this time, the first resonant cavity is opened. Figure 3 As shown, the jet medium water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, flows sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the internal channel of the second resonant cavity housing 12 and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0036] When the inlet pressure is 4~7MPa, the first directional valve 101 and the second directional valve 102 are energized in their left positions, the third directional valve 103 remains in its neutral position, and the fourth directional valve 104 is energized in its right position. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder and the middle left chamber of the multi-stage annular hydraulic cylinder, and flows out from the right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13 and the second resonant cavity housing 12 extend out. At this time, the first and second resonant cavities are open, as shown... Figure 4 As shown, water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, flows sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the second resonant cavity, the internal channel of the second resonant cavity housing 12, and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0037] When the inlet pressure is greater than or equal to 7 MPa, the left positions of the first reversing valve 101, the second reversing valve 102, and the third reversing valve 103 are energized, and the right position of the fourth reversing valve 104 is energized. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder, the left chamber of the multi-stage annular hydraulic cylinder, and the right chamber of the multi-stage annular hydraulic cylinder, and flows out from the right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13, the second resonant cavity housing 12, and the third resonant cavity housing 10 extend, and at this time, the first resonant cavity, the second resonant cavity, and the third resonant cavity are simultaneously opened. Water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, flows sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the second resonant cavity, the internal channel of the second resonant cavity housing 12, the third resonant cavity, and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0038] When the multispectral imaging camera 11 detects liquid or gas combustion characteristics, specifically the 700-1400K high-temperature radiation region, where ultraviolet radiation is significantly enhanced, and the near-infrared and mid-infrared bands exhibit steep radiation patterns of liquid / gas combustion, with concentrated flame morphology and prominent blue-white components, and no obvious solid smoldering characteristics, and determines it to be a Class B flammable liquid or Class C combustible gas combustion condition, the data processing module 19 adjusts the ratio of water to nitrogen dry powder particles involved in the operation by regulating the water medium valve and the nitrogen dry powder particle valve. For example, with a ratio of 0:1, simultaneously energizing the right positions of the first directional valve 101, the second directional valve 102, and the third directional valve 103, and energizing the left position of the fourth directional valve 104, water flows in from the right chamber of the multi-stage annular hydraulic cylinder, flows in from the left chamber and the inner left chamber of the multi-stage annular hydraulic cylinder, and flows out from the inner right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13, the second resonant cavity housing 12, and the third resonant cavity housing 10 retract, at which point the first, second, and third resonant cavities are all closed. Figure 2 As shown, nitrogen dry powder flows in from the nitrogen dry powder inlet 1601 of the multi-inlet flow stabilizer 16, flows through the internal channels of the first resonant cavity housing 13, the second resonant cavity housing 12 and the third resonant cavity housing 10 in sequence, and is ejected from the outlet of the third resonant cavity housing 10.

[0039] S3. When the multispectral imaging camera 11 simultaneously captures the broad-spectrum thermal radiation and plume characteristics of Class A solid combustion, and the strong ultraviolet and high-temperature peak radiation of Class B / C liquid / gas combustion, the temperature field exhibits a mixed distribution of high and low temperatures, and the spectral characteristics combine the dual spectra of solid open flame and gas-liquid combustion, it is determined to be a complex fire condition with multiple types of combustibles coexisting. The ratio of water and nitrogen dry powder media used in the operation is determined based on the characteristics of the mixed combustibles at the fire scene. The specific operation process is as follows: When the features captured by the multispectral imaging camera 11 are mainly solid broadband thermal radiation, orange-red flames, strong mid-infrared CO2 peaks, low-frequency scintillation, and thick smoke plumes, while the ultraviolet and high-temperature peak signals of liquids are weak, it is determined that solid fires account for a higher proportion and liquid fires account for a lower proportion. The data processing module 19 adjusts the ratio of water to nitrogen dry powder particles to 7:3 by regulating the water medium valve and the nitrogen dry powder particle valve.

[0040] When the multispectral imaging camera 11 simultaneously and evenly captures the broad spectrum plume characteristics of solid combustion and the strong ultraviolet and high-temperature peak radiation of liquid, the temperature field shows alternating high and low temperatures, and the dual spectral signals coexist synchronously, it is determined that the proportion of solid and liquid fires is basically balanced. The data processing module 19 adjusts the ratio of water to nitrogen dry powder particles to 1:1 by regulating the water medium valve and the nitrogen dry powder particle valve.

[0041] When the multispectral imaging camera 11 captures a dominant characteristic of liquid combustion—strong ultraviolet radiation and high-temperature peak spectra—while solid thermal radiation, plume, and CO2 characteristics are significantly weakened, and flame fluctuations intensify, it is determined that the proportion of liquid fires is relatively high. The data processing module 19 adjusts the ratio of water to nitrogen dry powder particles to 3:7 by regulating the water medium valve and the nitrogen dry powder particle valve.

[0042] Simultaneously, the number of resonant cavities is adjusted based on the pressure information of the power source collected by the pressure sensor. The specific control process is as follows: When the inlet pressure is less than or equal to 4 MPa, the left position of the first directional valve 101 is energized, the second directional valve 102 and the third directional valve 103 remain in the neutral position, and the right position of the fourth directional valve 104 is energized. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder and flows out from the right chamber. The first resonant cavity housing 13 extends, and the first resonant cavity is opened. The jet medium water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, and nitrogen dry powder flows in from the nitrogen dry powder inlet 1601. The jet medium flows sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the internal channel of the second resonant cavity housing 12, and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0043] When the inlet pressure is 4~7MPa, the left positions of the first reversing valve 101 and the second reversing valve 102 are energized, the third reversing valve 103 remains in the middle position, and the right position of the fourth reversing valve 104 is energized. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder and the middle left chamber of the multi-stage annular hydraulic cylinder, and flows out from the right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13 and the second resonant cavity housing 12 extend, and at this time, the first resonant cavity and the second resonant cavity are open. Water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, and nitrogen dry powder flows in from the nitrogen dry powder inlet 1601, flowing sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the second resonant cavity, the internal channel of the second resonant cavity housing 12, and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0044] When the inlet pressure is greater than or equal to 7 MPa, the left positions of the first reversing valve 101, the second reversing valve 102, and the third reversing valve 103 are energized, and the right position of the fourth reversing valve 104 is energized. Water flows in from the left chamber of the multi-stage annular hydraulic cylinder, the left chamber of the multi-stage annular hydraulic cylinder, and the right chamber of the multi-stage annular hydraulic cylinder, and flows out from the right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13, the second resonant cavity housing 12, and the third resonant cavity housing 10 extend, and at this time, the first resonant cavity, the second resonant cavity, and the third resonant cavity are simultaneously opened. Water flows in from the water medium port 1602 of the multi-inlet flow stabilizer 16, and nitrogen dry powder flows in from the nitrogen dry powder inlet 1601, flowing sequentially through the first resonant cavity, the internal channel of the first resonant cavity housing 13, the second resonant cavity, the internal channel of the second resonant cavity housing 12, the third resonant cavity, and the internal channel of the third resonant cavity housing 10, and is ejected from the outlet of the third resonant cavity housing 10.

[0045] S4. When the multispectral imaging camera 11 detects that the temperature in the fire area has dropped to near the ambient temperature, the flame characteristic band radiation signal has significantly attenuated and disappeared, there is no flame flickering or high-temperature heat radiation area, and the smoke gradually dissipates, and it is determined to be a fire extinguishing condition, the water medium valve is closed, the nitrogen dry powder particle valve is closed, the right position of the first reversing valve 101, the second reversing valve 102 and the third reversing valve 103 is energized, the left position of the fourth reversing valve 104 is energized, water flows in from the right chamber of the multi-stage annular hydraulic cylinder, and flows out from the left chamber, the middle left chamber and the middle right chamber of the multi-stage annular hydraulic cylinder. The first resonant cavity housing 13, the second resonant cavity housing 12 and the third resonant cavity housing 10 retract. At this time, the first resonant cavity, the second resonant cavity and the third resonant cavity are all closed, returning to the initial state.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-media composite adjustable multi-resonant chamber internal fire sprinkler characterized by: It includes a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a cavity shell, a first resonant cavity shell, a second resonant cavity shell, a third resonant cavity shell, an integrated shell frame, and an inlet medium control assembly. The inlet medium control assembly includes a water medium valve, a nitrogen dry powder particle valve, and a multi-inlet flow stabilizer. The multi-inlet flow stabilizer includes a nitrogen dry powder inlet, a water medium outlet, a first support flow stabilizer, and a second support flow stabilizer. The nitrogen dry powder inlet and the water medium outlet are coaxially arranged inside the multi-inlet flow stabilizer. Both the first and second support flow stabilizers are located inside the water medium outlet. The first support flow stabilizer is located at the junction of the front and rear holes of the water medium outlet, and the second support flow stabilizer is located at the tail of the water medium outlet, thereby realizing coaxial stable flow input of multiphase media. The multi-inlet current stabilizer is located inside the integrated housing frame, and the outlet end of the multi-inlet current stabilizer is connected to the outlet end of the integrated housing frame; the first mounting end of the integrated housing frame is connected to the first mounting end of the cavity shell; the second mounting end of the integrated housing frame is connected to the internal connection end of the first resonant cavity shell, the outer wall of the second connection end of the first resonant cavity shell is connected to the internal connection end of the second resonant cavity shell, the outer wall of the second connection end of the second resonant cavity shell is connected to the internal connection end of the third resonant cavity shell, and the outer wall of the second connection end of the third resonant cavity shell is connected to the outlet end of the cavity shell; The first resonant cavity shell, the second resonant cavity shell, and the third resonant cavity shell are nested sequentially inside the integrated shell frame, forming three independent and series-connected resonant cavities. The space between the outer wall of the integrated shell frame and the interior of the first resonant cavity shell is the first resonant cavity. The space between the outer wall of the second connecting end of the first resonant cavity shell and the interior of the second resonant cavity shell is the second resonant cavity. The space between the outer wall of the second connecting end of the second resonant cavity shell and the interior of the third resonant cavity shell is the third resonant cavity. The three resonant cavities have different diameters and are nested within the finite axial length of the integrated shell frame. Different numbers of resonant cavities are matched according to the pressure at the water medium inlet to achieve the step-by-step enhancement of multi-stage pressure pulses.

2. The multi-media composite tunable multi-resonant chamber internal deluge nozzle of claim 1, wherein: The space enclosed by the outer wall of the integrated shell frame, the interior of the cavity shell, and the first side of the first connecting end of the first resonant cavity shell is the left chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the second side of the first connecting end of the first resonant cavity shell, the outer wall of the second connecting end of the first resonant cavity shell, the interior of the cavity shell, and the first side of the first connecting end of the second resonant cavity shell is the middle left chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the second side of the first connecting end of the second resonant cavity shell, the outer wall of the second connecting end of the second resonant cavity shell, the interior of the cavity shell, and the first side of the first connecting end of the third resonant cavity shell is the middle right chamber of the multi-stage annular hydraulic cylinder. The space enclosed by the second side of the first connecting end of the third resonant cavity shell, the outer wall of the second connecting end of the third resonant cavity shell, and the interior of the cavity shell is the right chamber of the multi-stage annular hydraulic cylinder.

3. The multi-media composite tunable multi-resonant chamber internal deluge nozzle of claim 1, wherein: It also includes a data processing module, which is located between the outer wall of the multi-inlet flow stabilizer and the inner wall of the integrated housing frame, while the reversing valve is located in a groove on the outer wall of the integrated housing frame.

4. The multi-media composite tunable multi-resonant chamber internal deluge nozzle of claim 1, wherein: In the multi-inlet flow stabilizer, the water medium inlet is a variable diameter conical orifice, consisting of a front end orifice and a rear end orifice, with a diameter ratio of 2:1 between the front end and the rear end orifice. The nitrogen dry powder inlet is a constant diameter cylindrical orifice.

5. The multi-media composite adjustable multi-resonant chamber internal deluge nozzle of claim 3, wherein: It also includes a multispectral imaging camera, a second mounting end of the cavity housing, and a connection to the multispectral imaging camera.

6. The multi-medium composite adjustable multi-resonant cavity indoor fire nozzle according to claim 1, characterized in that: The outer wall of the first connecting end of the first resonant cavity housing is connected to the first connecting end inside the cavity shell through a sealing ring; the outer wall of the first connecting end of the second resonant cavity housing is connected to the second connecting end inside the cavity shell through a sealing ring; and the outer wall of the first connecting end of the third resonant cavity housing is connected to the third connecting end inside the cavity shell through a sealing ring.

7. The multi-medium composite adjustable multi-resonant cavity indoor fire nozzle according to claim 1, characterized in that: The first fixed end of the first connecting end of the first resonant cavity housing is connected to the third mounting end of the integrated housing frame through the first limiting bolt. The first fixed end of the first connecting end of the second resonant cavity housing is connected to the second fixed end of the first connecting end of the first resonant cavity housing through the second limiting bolt. The first fixed end of the first connecting end of the third resonant cavity housing is connected to the second fixed end of the first connecting end of the second resonant cavity housing through the third limiting bolt.

8. A method for controlling a multi-medium composite adjustable multi-resonant cavity indoor fire nozzle as described in claim 1, characterized in that: Specifically, the following steps are included: S1. In the initial state, the right position of the first reversing valve, the second reversing valve and the third reversing valve are energized, the left position of the fourth reversing valve is energized, the first resonant cavity, the second resonant cavity and the third resonant cavity are closed, and the multispectral imaging camera is activated. If the multispectral imaging camera detects a fire with a single combustion feature, proceed to S2. If the multispectral imaging camera detects a fire composed of two combustion features, proceed to S3. S2. If the multispectral imaging camera only detects solid combustion features, the data processing module opens the water medium valve and simultaneously adjusts the energization of the first, second, third, and fourth reversing valves according to the pressure feedback from the pressure sensor located at the water medium valve, thereby controlling the opening of different numbers of resonant cavities to ensure the final impact force; when the multispectral imaging camera only detects liquid or gas combustion features, the data processing module opens the nitrogen dry powder particle valve. S3. If the multispectral imaging camera simultaneously identifies combustion characteristics of solids and liquids or solids and gases, the ratio of water to nitrogen dry powder particles is adjusted according to the significance of the combustion characteristics of the solids, liquids, or gases. S4. Based on S2 or S3, if the multispectral imaging camera identifies the characteristics of solid, liquid or gas extinguishing in the fire, the data processing module closes the water medium valve and the nitrogen dry powder valve respectively, and controls the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve to restore the first resonant cavity, the second resonant cavity and the third resonant cavity to their initial state.

9. The method for controlling a multi-medium composite adjustable multi-resonant cavity indoor fire nozzle according to claim 8, characterized in that: The specific operation process of controlling the opening of different numbers of resonant cavities by energizing the pressure regulating reversing valve based on the feedback from the pressure sensor is as follows: When the inlet pressure is less than or equal to 4 MPa, the left position of the first directional valve is energized, the second and third directional valves remain in the neutral position, and the right position of the fourth directional valve is energized. At this time, the first resonant cavity is open. When the inlet pressure is between 4 and 7 MPa, the left positions of the first and second directional valves are energized, the third directional valve remains in the neutral position, and the right position of the fourth directional valve is energized. At this time, the first and second resonant cavities are open. When the inlet pressure is greater than or equal to 7 MPa, the left positions of the first, second, and third directional valves are energized, and the right position of the fourth directional valve is energized. At this time, the first, second, and third resonant cavities are open.

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