Combustible gas pipeline leakage jet flame simulation and water mist fire extinguishing device

Abstract

The present application relates to a combustible gas pipeline leakage jet flame simulation and water mist fire extinguishing device, comprising: a jet flame simulation device for simulating different jet flames in the case of combustible gas passing; a plurality of water mist sprayers are located at the top of the jet flame simulation device and are arranged circumferentially around the jet flame for spraying water mist on the jet flame for fire extinguishing. The present application has the advantages of compact structure, flexible organization of multiple leakage jet flames, and flexible adjustment of water mist particle size and spray angle.

Description

Technical Field

[0001] This invention relates to the field of combustible gas pipeline leak jet flame combustion and its extinguishing technology, specifically to a combustible gas pipeline leak jet flame simulation and fine water mist extinguishing device. Background Technology

[0002] Against the backdrop of national energy conservation and emission reduction, the safe and efficient utilization of fuel combustion has become a hot topic of concern. In the overall fuel combustion technology roadmap, clean gaseous fuels such as natural gas are often transported long distances via pipelines for residential use. However, pipeline transportation carries the risk of pipeline leaks and ruptures, especially with the country's strong advocacy for the use of zero-carbon fuels such as hydrogen and ammonia. The pipeline transportation of hydrogen and ammonia carries even more serious risks of leaks and ruptures. Combustible gas leaks often occur over large areas at extremely rapid rates. If the initial jet flame is not effectively and promptly contained, it can easily lead to major fires, explosions, poisoning, and other serious accidents, often resulting in significant casualties and economic losses.

[0003] Therefore, while strengthening the technical capabilities related to pipeline transportation, it is also necessary to pay attention to the problems of flammable gas ignition and fire extinguishing once a flammable gas leak occurs in the pipeline.

[0004] In order to conduct a systematic study on the ignition and extinguishing performance of combustible gases after pipeline leakage, and with the help of systematic measurement methods in the laboratory, it is urgent to build a jet flame experimental device that can flexibly simulate various typical pipeline leakage conditions under laboratory conditions, as well as a fine water mist fire extinguishing device with flexible adjustment performance. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a flammable pipeline leak jet flame simulation and fine water mist fire extinguishing device, which has the advantages of compact structure, flexible organization of various leak jet flames, and flexible adjustment of fine water mist particle size and spray angle.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The combustible pipeline leakage jet flame simulation and fine water mist fire extinguishing device of the present invention includes: a jet flame simulation device for simulating different jet flames when combustible gas is introduced; and a fine water mist sprayer, wherein a plurality of fine water mist sprayers are located on the top of the jet flame simulation device and arranged around the jet flame circumferentially for spraying fine water mist onto the jet flame for fire extinguishing.

[0007] The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device is preferably provided in that the jet flame simulation device includes: an inlet main pipe; an inlet pipe connected to one side of the inlet main pipe; branch pipes, the first ends of several branch pipes being connected to the other side of the inlet main pipe respectively, and the second ends of several branch pipes being connected to an end main pipe respectively; and an end main pipe connected to the second ends of the branch pipes; wherein, each branch pipe is provided with several leak simulators, and the leak simulators are used to simulate different jet flames.

[0008] The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, includes a leak simulator comprising a rotating cylinder, positioning rings, and an adjusting ring assembly; the two ends of the rotating cylinder are respectively fitted onto adjacent short sections on both sides of the branch pipe, and the cylinder wall of the rotating cylinder is provided with a perforated window; two positioning rings are fitted onto the rotating cylinder at intervals and are tightly fitted or fixedly connected to the rotating cylinder; the adjusting ring assembly is fitted onto the rotating cylinder and located between the two positioning rings; the outer wall of the adjusting ring assembly is provided with leak ports of different shapes; when the leak ports of different shapes are opposite the perforated window, different flame jet ports are formed.

[0009] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, includes an adjusting ring assembly comprising a proximal adjusting ring, an intermediate adjusting ring, and a distal adjusting ring; the proximal adjusting ring, the intermediate adjusting ring, and the distal adjusting ring are arranged adjacent to each other in order of increasing distance from the inlet manifold; the rear end of the proximal adjusting ring and the front end of the intermediate adjusting ring, and the rear end of the intermediate adjusting ring and the front end of the distal adjusting ring are respectively connected by a stepped connection; correspondingly, the leak outlet includes a proximal multi-structure leak outlet, an intermediate multi-structure leak outlet, and a distal multi-structure leak outlet; the proximal multi-structure leak outlet, the intermediate multi-structure leak outlet, and the distal multi-structure leak outlet respectively include circular openings of different sizes, rectangular openings of different sizes, S-shaped openings, crescent-shaped openings, and triangular openings.

[0010] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, the fine water mist injector includes a central column cone, an inner layer separator, an outer shell, an inner layer swirling gas distributor, an outer layer swirling gas distributor, an inner layer direct current gas distributor, and an outer layer direct current gas distributor. A central water flow channel is provided through the center of the central column cone; The inner layer separator is coaxially sleeved outside the central column cone, and an inner layer swirling air channel is formed between the inner wall of the inner layer separator and the outer wall of the central column cone. The outer shell is coaxially sleeved on the inner partition body, and an outer swirling air channel is formed between the inner wall of the outer shell and the outer wall of the inner partition body. The inner swirling gas distributor is sleeved on the upper part of the outer shell and is tangentially connected to the cross section of the inner swirling gas channel; The outer swirling gas distributor is sleeved on the upper part of the outer shell and is tangentially connected to the cross section of the outer swirling gas channel; The inner layer DC gas distributor is sleeved outside the lower part of the outer shell and is radially connected to the cross section of the inner layer swirling gas channel; The outer layer DC gas distributor is sleeved on the lower part of the outer shell and is radially connected to the cross section of the outer layer swirling gas channel.

[0011] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device is preferably provided in the following way: the central column cone includes a first cone structure and a first column structure integrally arranged from top to bottom; the inner layer separator includes a shaped body structure and a second column structure integrally arranged from top to bottom, the shaped body structure having an inner cone surface and an outer cone surface; the outer shell includes a second cone structure and a third column structure integrally arranged from top to bottom.

[0012] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, has a cone angle of α for the first cone structure; The cone angle of the inner cone surface of the irregular body structure is α; The cone angle of the outer cone surface of the irregular body structure is β; The cone angle of the second cone structure is β; Among them, 20°<α<60°, 1.5α<β<3α.

[0013] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, the inner swirling gas distribution body includes an inner swirling body with an inner swirling gas ring cavity and an inner swirling gas tangential flow channel, the inner swirling gas ring cavity being tangentially connected to the inner swirling gas channel through the inner swirling gas tangential flow channel; The outer swirling gas distribution body includes an outer swirling body with an outer swirling gas annular cavity and an outer swirling gas tangential flow channel. The outer swirling gas annular cavity is tangentially connected to the outer swirling gas channel through the outer swirling gas tangential flow channel. The inner layer DC gas distributor includes an inner layer DC body with an inner layer DC gas ring cavity and an inner layer DC gas radial flow channel. The inner layer DC gas ring cavity is radially connected to the inner layer swirling gas channel through the inner layer DC gas radial flow channel. The outer DC gas distribution body includes an outer DC body with an outer DC gas ring cavity and an outer DC gas radial flow channel. The outer DC gas ring cavity is radially connected to the outer swirling gas channel through the outer DC gas radial flow channel.

[0014] The combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device, preferably, further includes a swirling airflow pipeline and a direct airflow pipeline in the fine water mist injector; The swirling airflow pipeline includes two swirling air branch pipes and a swirling air inlet pipe. The first ends of the two swirling air branch pipes are respectively connected to the inner swirling air ring cavity and the outer swirling air ring cavity. The second ends of the two swirling air branch pipes merge together and are connected to the swirling air inlet pipe. Swirling air valves are respectively provided on the two swirling air branch pipes. The DC airflow pipeline includes two DC air branch pipes and a DC air inlet pipe. The first ends of the two DC air branch pipes are respectively connected to the inner DC air ring cavity and the outer DC air ring cavity. The second ends of the two DC air branch pipes merge together and are connected to the DC air inlet pipe. A DC air valve is provided on each of the two DC air branch pipes.

[0015] The combustible gas pipeline leakage jet flame simulation and fine water mist fire extinguishing device is preferably further comprising a circular end cap and a water inlet pipe; the circular end cap is disposed on the tail end of the central column cone, the inner layer partition and the outer shell forming an integral whole; the water inlet pipe is inserted into the circular end cap and communicates with the central water flow channel.

[0016] The present invention has the following advantages due to the adoption of the above technical solutions: (1) The jet flame simulation device described in this invention can flexibly select and arbitrarily combine the leakage port units to construct a variety of leakage port shapes, and can simulate a variety of leakage jet flames that are close to the actual pipeline leakage conditions. (2) By starting and stopping each adjacent leak simulator and adjusting the spray angle, the combustion behavior of multiple leak jet flame groups can be simulated, such as multiple parallel leak jet flames, multiple cross leak jet flames, etc. (3) The fine water mist jetter described in this invention can be used to adjust the cone angle of the fine water mist sprayed online. Specifically, the airflow ratio between the inner and outer airflows can be adjusted to adjust the atomization cone angle in the range of α to β. (4) The fine water mist jetter described in this invention can be used to flexibly adjust the droplet size of the sprayed fine water mist. Specifically, by adjusting the momentum ratio between the swirling airflow and the direct airflow in the inner and outer channels, the overall airflow swirling intensity at the nozzle outlet can be adjusted to adjust the shearing and breaking effect on the water flow, thereby achieving online flexible adjustment of the droplet size. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings: Figure 1 This is a top view of the jet flame simulation device in this invention; Figure 2 yes Figure 1 The leaked simulator's main view; Figure 3 yes Figure 2 Sectional view along the AA direction; Figure 4 yes Figure 2 BB-direction section view; Figure 5 yes Figure 2 A schematic diagram of the adjustment ring assembly unfolded circumferentially. Figure 6 yes Figure 2 A schematic diagram of the rotating cylinder unfolding circumferentially; Figure 7 This is a schematic diagram of constructing multiple parallel leaking jet flames in this invention; Figure 8 This is a schematic diagram of constructing a multi-stream cross-leaking jet flame in this invention; Figure 9 This is an axial sectional view of the fine water mist jetter in this invention; Figure 10 This is a first-direction side view of the fine water mist jetter in this invention; Figure 11 This is a second-direction side view of the fine water mist jetter in this invention; Figure 12 This is a CC cross-sectional view of the fine water mist jetter in this invention; Figure 13 This is a DD cross-sectional view of the fine water mist jetter in this invention; Figure 14 This is a cross-sectional view of the EE section of the fine water mist jet generator in this invention; Figure 15 This is a cross-sectional view of the fine water mist jet injector in this invention. Figure 16 This is a schematic diagram of the atomization cone angle distribution of the fine water mist jet in this invention; Figure 17 This is a schematic diagram of the overall layout of the jet flame simulation device and fine water mist injector of the present invention.

[0018] The markings in the attached diagram are as follows: 1-Jet flame simulation device; 11-Branch pipe; 12-Leakage simulator; 121-Rotating cylinder; 1211-Perforated window; 122-Positioning ring; 123-Proximal adjustment ring; 1231-Proximal multi-structure leak port; 124-Intermediate adjustment ring; 1241-Intermediate multi-structure leak port; 125-Distant adjustment ring; 1251-Distant multi-structure leak port; 126-Sealing ring; 13-End main pipe; 14-Inlet main pipe; 15-Inlet pipe; 2-Fine water mist injector; 21-Central water flow channel; 22-Central column cone; 23-Inner swirling air channel; 24-Inner swirling air distributor; 241-Inner swirling air annular cavity; 242-Inner swirling air tangential channel; 25-Outer swirling air distributor; 251-Outer swirling air annular cavity; 252-Outer swirling air tangential channel; 26-Inner direct current air distributor; 261-Inner direct current air annular cavity; 262-Inner direct current air radial channel; 27-Outer layer 271-Outer layer direct current air distribution body; 272-Outer layer direct current air radial flow channel; 28-Swirl airflow pipeline; 281-Swirl air valve; 282-Swirl air branch pipe; 283-Swirl air inlet pipe; 29-Direct current airflow pipeline; 291-Direct current air valve; 292-Direct current air branch pipe; 293-Direct current air inlet pipe; 210-Inner layer separator; 211-Outer layer swirling air channel; 212-Outer shell; 213-Water inlet pipe. Detailed Implementation

[0019] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0020] This invention provides a device for simulating jet flames and extinguishing fires with fine water mist in the event of a combustible pipeline leak. The device includes: a jet flame simulation apparatus for simulating different jet flames when combustible gas is introduced; and several fine water mist injectors, each located on top of the jet flame simulation apparatus and arranged circumferentially around the jet flame, for spraying fine water mist onto the jet flame for fire extinguishing. This invention offers advantages such as a compact structure, flexible organization of various leak jet flames, and flexible adjustment of the fine water mist particle size and spray angle.

[0021] like Figure 17 As shown, the combustible pipeline leak jet flame simulation and fine water mist fire extinguishing device provided by the present invention includes: Jet flame simulation device 1 is used to simulate different jet flames when combustible gas is introduced; Fine water mist sprayers 2, several fine water mist sprayers are located on top of the jet flame simulation device 1 and are arranged around the jet flame to spray fine water mist onto the jet flame for fire extinguishing.

[0022] In the above embodiments, preferably, as follows: Figure 1 As shown, the jet flame simulation device 1 includes: an inlet main pipe 14; an inlet pipe 15 connected to one side of the inlet main pipe 14; branch pipes 11, the first ends of several branch pipes 11 are respectively connected to the other side of the inlet main pipe 14, and the second ends of several (three in this embodiment) branch pipes 11 are respectively used to connect to the end main pipe 13; the end main pipe 13 is connected to the second end of the branch pipes 11; wherein, several leakage simulators 12 are provided on each branch pipe 11, and the leakage simulators 12 are used to simulate different jet flames.

[0023] In the above embodiments, preferably, as follows: Figures 2 to 4 As shown, the leakage simulator 12 includes a rotating cylinder 121, a positioning ring 122, and an adjusting ring assembly; both ends of the rotating cylinder 121 are respectively fitted onto adjacent short sections on both sides of the branch pipe 11, and the cylinder wall of the rotating cylinder 121 is provided with a perforated window 1211 (see...). Figure 6 ); Two positioning rings 122 are spaced apart and sleeved on the outside of the rotating cylinder 121, and are tightly fitted or fixedly connected to the rotating cylinder 121; The adjusting ring assembly is sleeved outside the rotating cylinder 121 and located between the two positioning rings 122; the outer wall of the adjusting ring assembly is provided with leakage ports of different shapes (see...). Figure 5 Different flame jets are formed when the leaks of different shapes are opposite the perforated window 1211.

[0024] In the above embodiments, preferably, as follows: Figure 2 and Figure 3 As shown, the regulating ring assembly includes a proximal regulating ring 123, an intermediate regulating ring 124, and a distal regulating ring 125; The proximal regulating ring 123, the intermediate regulating ring 124 and the distal regulating ring 125 are arranged adjacent to each other in order of distance from the inlet manifold 14; the rear end of the proximal regulating ring 123 and the front end of the intermediate regulating ring 124, and the rear end of the intermediate regulating ring 124 and the front end of the distal regulating ring 125 are respectively connected by a step-like manner. Accordingly, such as Figure 5 As shown, the leakage outlet includes a near-end multi-structure leakage outlet 1231, an intermediate multi-structure leakage outlet 1241, and a far-end multi-structure leakage outlet 1251; The proximal multi-structure leakage port 1231, the intermediate multi-structure leakage port 1241 and the distal multi-structure leakage port 1251 respectively include circular ports of different sizes, rectangular ports of different sizes, S-shaped ports, crescent-shaped ports and triangular ports.

[0025] It should be noted that when the two ends of the rotating cylinder 121 are respectively fitted onto two adjacent short sections of the branch pipe 11, an annular boss protruding outward is provided at the connecting end of the branch pipe 11. The maximum outer diameter of the boss is equal to the inner diameter of the intermediate cavity of the rotating cylinder 121. Correspondingly, an annular boss protruding inward is provided at both ends of the rotating cylinder 121. The minimum inner diameter of the boss is equal to the outer diameter of the branch pipe 11. At the connection between the two ends of the rotating cylinder 121 and the branch pipe 11, one end of the annular boss protruding outward in the branch pipe 11 extends coaxially into the interior of the rotating cylinder 121, and the annular boss protruding outward in the branch pipe 11 and the annular boss protruding inward at both ends of the rotating cylinder 121 are arranged adjacent to each other along the axial direction. In addition, the jet flame simulation device 1 also includes a sealing ring 126; sealing rings 126 are respectively provided at the following locations: adjacent to the outer wall of the annular boss of the branch pipe 11 and the inner wall of the middle area of ​​the rotating cylinder 121; adjacent to the outer wall of the branch pipe 11 and the inner wall of the annular boss of the rotating cylinder 121; the connection area between the left and right ends of the leakage simulator 12 and the branch pipe 11; between the adjacent overlapping surfaces of the proximal adjusting ring 123, the middle adjusting ring 124 and the distal adjusting ring 125; in the area near the left positioning ring 122 and located between the inner wall of the proximal adjusting ring 123 and the outer wall of the rotating cylinder 121; and in the area near the right positioning ring 122 and located between the inner wall of the distal adjusting ring 125 and the outer wall of the rotating cylinder 121. The sealing rings are used to seal the combustible gas. In addition, a dodecagonal nut-shaped boss is fixedly provided on the outer side of the rotating cylinder 121 near the inlet pipe 15. The purpose of the dodecagonal nut-shaped boss is to facilitate the use of external tools (such as wrenches) to adjust the angle of each leakage simulator 12.

[0026] In the above embodiments, preferably, as follows: Figure 9 and Figure 10 As shown, the fine water mist injector 2 includes a central column cone 22, an inner layer separator 210, an outer shell 212, an inner layer swirling air distributor 24, an outer layer swirling air distributor 25, an inner layer direct current air distributor 26, and an outer layer direct current air distributor 27. A central water flow channel 21 is provided through the center of the central column cone 22; the inner layer partition 210 is sleeved around the central column cone 22 along the central axis, and an inner layer swirling air channel 23 is formed between the inner wall of the inner layer partition 210 and the outer wall of the central column cone 22; the outer layer shell 212 is sleeved around the inner layer partition 210 along the central axis, and an outer layer swirling air channel 211 is formed between the inner wall of the outer layer shell 212 and the outer wall of the inner layer partition 210. The inner swirling gas distributor 24 is fitted on the upper part of the outer shell 212 and is tangentially connected to the cross section of the inner swirling gas channel 23; the outer swirling gas distributor 25 is fitted on the upper part of the outer shell 212 and is tangentially connected to the cross section of the outer swirling gas channel 211; the inner direct-flow gas distributor 26 is fitted on the lower part of the outer shell 212 and is radially connected to the cross section of the inner swirling gas channel 23; the outer direct-flow gas distributor 27 is fitted on the lower part of the outer shell 212 and is radially connected to the cross section of the outer swirling gas channel 211.

[0027] In the above embodiments, preferably, the central column cone 22 includes a first cone structure and a first column structure integrally arranged from top to bottom; the inner layer separator 210 includes an irregular shape structure and a second column structure integrally arranged from top to bottom, the irregular shape structure having an inner cone surface and an outer cone surface; the outer shell 212 includes a second cone structure and a third column structure integrally arranged from top to bottom.

[0028] In the above embodiments, preferably, the cone angle of the first cone structure is α; the cone angle of the inner cone surface of the irregular body structure is α; the cone angle of the outer cone surface of the irregular body structure is β; and the cone angle of the second cone structure is β; wherein, 20° < α < 60°, 1.5α < β < 3α.

[0029] In the above embodiments, preferably, as follows: Figure 12 As shown, the inner swirling gas distribution body 24 includes an inner swirling body with an inner swirling gas ring cavity 241 and an inner swirling gas tangential flow channel 242. The inner swirling gas ring cavity 241 is tangentially connected to the inner swirling gas channel 23 through the inner swirling gas tangential flow channel 242. like Figure 13 As shown, the outer swirling gas distribution body 25 includes an outer swirling body with an outer swirling gas annular cavity 251 and an outer swirling gas tangential flow channel 252. The outer swirling gas annular cavity 251 is tangentially connected to the outer swirling gas channel 211 through the outer swirling gas tangential flow channel 252. like Figure 14 As shown, the inner layer DC gas distribution body 26 includes an inner layer DC body with an inner layer DC gas ring cavity 261 and an inner layer DC gas radial flow channel 262. The inner layer DC gas ring cavity 261 is radially connected to the inner layer swirling gas channel 23 through the inner layer DC gas radial flow channel 162. like Figure 15 As shown, the outer layer DC gas distributor 27 includes an outer layer DC body with an outer layer DC gas ring cavity 271 and an outer layer DC gas radial flow channel 272. The outer layer DC gas ring cavity 271 is radially connected to the outer layer swirling gas channel 211 through the outer layer DC gas radial flow channel 272.

[0030] In the above embodiments, preferably, as follows: Figure 11As shown, the fine water mist jetter 2 also includes a swirling airflow pipe 28 and a direct airflow pipe 29; The swirling airflow pipe 28 includes two swirling air branch pipes 282 and a swirling air inlet pipe 283. The first ends of the two swirling air branch pipes 282 are respectively connected to the inner swirling air ring cavity 241 and the outer swirling air ring cavity 251. The second ends of the two swirling air branch pipes 282 merge together and are connected to the swirling air inlet pipe 283. Swirl gas valves 281 are installed on the two swirl gas branch pipes 282 respectively to regulate the flow rate of each gas stream; The DC airflow pipeline 29 includes two DC air branch pipes 292 and a DC air inlet pipe 293. The first ends of the two DC air branch pipes 292 are respectively connected to the inner DC air ring cavity 261 and the outer DC air ring cavity 271. The second ends of the two DC air branch pipes 292 merge together and are connected to the DC air inlet pipe 293. A direct air valve 291 is installed on each of the two direct air branch pipes 292 to regulate the flow rate of each air stream.

[0031] In the above embodiment, preferably, the fine water mist sprayer 2 further includes a circular end cap and a water inlet pipe 213; the circular end cap is placed on the tail end of the central column cone 22, the inner layer separator 210 and the outer shell 212 forming an integral whole; the water inlet pipe 213 is inserted on the circular end cap and communicates with the central water flow channel 21.

[0032] It should be noted that openings are present at the tips of the central column cone 22, the inner separator 210, and the outer shell 212 to form fine water mist spray nozzles. Figure 16 This is a schematic diagram of the atomization cone angle distribution of a fine water mist sprayer.

[0033] The working process of this invention is as follows: Combustible gas is introduced into the inlet pipe 15 of the jet flame simulation device. The combustible gas leaks out from the leak port of the leak simulator 12 and forms a flame when it is close to the fire source, thereby simulating a jet flame. The shape and angle of the flame can be achieved by adjusting the rotating cylinder 121 and the adjusting ring assembly of the leak simulator 12. During fire extinguishing, water is introduced through the water inlet pipe 213 of the fine water mist sprayer, and air is introduced through the swirling airflow pipe 28 and the direct airflow pipe 29, thereby breaking the water flow in the inner swirling airflow channel 23 and the outer swirling airflow channel 211 to form water mist. The water mist is sprayed out from the water mist spray nozzle to extinguish the flames.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for simulating a jet flame from a flammable pipeline leak and extinguishing it with fine water mist, characterized in that, include: A jet flame simulation device is used to simulate different jet flames when combustible gas is introduced. A fine water mist sprayer, several fine water mist sprayers are located on the top of the jet flame simulation device and arranged around the jet flame, for spraying fine water mist onto the jet flame to extinguish the fire; The jet flame simulation device includes: Entrance manager; An inlet pipe is connected to one side of the main inlet pipe; Branch pipes, the first end of several branch pipes is connected to the other side of the inlet main pipe respectively, and the second end of several branch pipes is used to connect to the end main pipe respectively; The end main pipe is connected to the second end of the branch pipe; Each of the branch pipes is equipped with several leakage simulators, which are used to simulate different jet flames; The leak simulator includes a rotating cylinder, a positioning ring, and an adjusting ring assembly; The two ends of the rotating cylinder are respectively fitted onto the adjacent short sections on both sides of the branch pipe, and the cylinder wall of the rotating cylinder is provided with a hollow window; The two positioning rings are spaced apart and sleeved on the outside of the rotating cylinder, and are tightly fitted or fixedly connected to the rotating cylinder; The adjusting ring assembly is sleeved outside the rotating cylinder and located between the two positioning rings; the outer wall of the adjusting ring assembly is provided with leakage ports of different shapes; Different flame jet nozzles are formed when the leaks of different shapes are opposite the perforated window; The regulating ring assembly includes a proximal regulating ring, an intermediate regulating ring, and a distal regulating ring; The proximal regulating ring, the intermediate regulating ring, and the distal regulating ring are arranged adjacent to each other in order of distance from the inlet manifold; the rear end of the proximal regulating ring and the front end of the intermediate regulating ring, and the rear end of the intermediate regulating ring and the front end of the distal regulating ring are respectively connected by a stepped manner.

2. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 1, characterized in that, The leak outlets include a near-end multi-structure leak outlet, an intermediate multi-structure leak outlet, and a far-end multi-structure leak outlet; The proximal multi-structure leakage port, the intermediate multi-structure leakage port, and the distal multi-structure leakage port include circular ports of different sizes, rectangular ports of different sizes, S-shaped ports, crescent-shaped ports, and triangular ports, respectively.

3. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 1, characterized in that, The fine water mist jet injector includes a central column cone, an inner layer separator, an outer shell, an inner swirling air distributor, an outer swirling air distributor, an inner direct current air distributor, and an outer direct current air distributor. A central water flow channel is provided through the center of the central column cone; The inner layer separator is coaxially sleeved outside the central column cone, and an inner layer swirling air channel is formed between the inner wall of the inner layer separator and the outer wall of the central column cone. The outer shell is coaxially sleeved on the inner partition body, and an outer swirling air channel is formed between the inner wall of the outer shell and the outer wall of the inner partition body. The inner swirling gas distributor is sleeved on the upper part of the outer shell and is tangentially connected to the cross section of the inner swirling gas channel; The outer swirling gas distributor is sleeved on the upper part of the outer shell and is tangentially connected to the cross section of the outer swirling gas channel; The inner layer DC gas distributor is sleeved outside the lower part of the outer shell and is radially connected to the cross section of the inner layer swirling gas channel; The outer layer DC gas distributor is sleeved on the lower part of the outer shell and is radially connected to the cross section of the outer layer swirling gas channel.

4. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 3, characterized in that, The central column cone includes a first cone structure and a first column structure integrally formed from top to bottom; The inner layer separator includes an irregularly shaped structure and a second column structure integrally formed from top to bottom, wherein the irregularly shaped structure has an inner conical surface and an outer conical surface; The outer shell includes a second conical structure and a third columnar structure integrally formed from top to bottom.

5. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 4, characterized in that, The cone angle of the first cone structure is α; The cone angle of the inner cone surface of the irregular body structure is α; The cone angle of the outer cone surface of the irregular body structure is β; The cone angle of the second cone structure is β; Among them, 20°<α<60°, 1.5α<β<3α.

6. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 3, characterized in that, The inner swirling gas distribution body includes an inner swirling body with an inner swirling gas ring cavity and an inner swirling gas tangential flow channel. The inner swirling gas ring cavity is tangentially connected to the inner swirling gas channel through the inner swirling gas tangential flow channel. The outer swirling gas distribution body includes an outer swirling body with an outer swirling gas annular cavity and an outer swirling gas tangential flow channel. The outer swirling gas annular cavity is tangentially connected to the outer swirling gas channel through the outer swirling gas tangential flow channel. The inner layer DC gas distributor includes an inner layer DC body with an inner layer DC gas ring cavity and an inner layer DC gas radial flow channel. The inner layer DC gas ring cavity is radially connected to the inner layer swirling gas channel through the inner layer DC gas radial flow channel. The outer DC gas distribution body includes an outer DC body with an outer DC gas ring cavity and an outer DC gas radial flow channel. The outer DC gas ring cavity is radially connected to the outer swirling gas channel through the outer DC gas radial flow channel.

7. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 3, characterized in that, The fine water mist sprayer also includes a swirling airflow pipe and a direct airflow pipe; The swirling airflow pipeline includes two swirling air branch pipes and a swirling air inlet pipe. The first ends of the two swirling air branch pipes are respectively connected to the inner swirling air ring cavity and the outer swirling air ring cavity. The second ends of the two swirling air branch pipes merge together and are connected to the swirling air inlet pipe. Swirling air valves are respectively provided on the two swirling air branch pipes. The DC airflow pipeline includes two DC air branch pipes and a DC air inlet pipe. The first ends of the two DC air branch pipes are respectively connected to the inner DC air ring cavity and the outer DC air ring cavity. The second ends of the two DC air branch pipes merge together and are connected to the DC air inlet pipe. A DC air valve is provided on each of the two DC air branch pipes.

8. The combustible gas pipeline leak jet flame simulation and fine water mist fire extinguishing device according to claim 3, characterized in that, The fine water mist sprayer also includes a circular end cap and a water inlet pipe; The circular end cap is provided on the tail end where the central column cone, the inner partition, and the outer shell form an integral whole; The water inlet pipe is inserted into the circular end cap and is connected to the central water flow channel.

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