A smoking device employing a two-stage cyclone air atomizing nozzle

Abstract

The utility model provides a kind of smoke generator using two-stage cyclone air atomization nozzle, belong to smoke generator technical field, the smoke generator includes micro turbojet engine nozzle and is arranged at the smoke nozzle of micro turbojet engine nozzle export side, the inside of smoke nozzle is provided with atomizing device, the outlet of atomizing device and the outlet of smoke nozzle are set same direction;When working, micro turbojet engine is used as smoke power source, high temperature high pressure high-speed airflow generated from micro turbojet engine turbine export flows out from micro turbojet engine nozzle and enters from smoke nozzle import, smoke agent enters atomizing device, atomizing device is fully atomized after smoke agent and is discharged into smoke nozzle, and after atomization, smoke agent and airflow are fully mixed and are discharged from smoke nozzle outlet, and large-scale smoke screen is formed in short time, solve the problem that existing high-power smoke generator directly forms smoke screen due to smoke agent not passing through atomization, reduce smoke effect, cause smoke agent waste.

Description

Technical Field

[0001] This utility model belongs to the technical field of smoke generating devices, and in particular relates to a smoke generating device using a two-stage swirling air atomizing nozzle. Background Technology

[0002] Existing high-power smoke generating devices generally use micro turbojet engines as power sources. The smoke generating agent is fully mixed, atomized, and evaporated under the action of the high-temperature, high-pressure, and high-speed airflow at the outlet of the micro turbojet engine. The resulting smoke screen is used to block visible light, with a high smoke generation rate and an airflow outlet velocity of hundreds of meters per second. It is minimally affected by natural wind within a range of tens of meters. Existing high-power smoke generating devices generally use direct-injection nozzles to inject the smoke generating agent directly into the high-temperature combustion gas without atomization to form a smoke screen. Because it is difficult for the injected smoke generating agent to be fully mixed with the combustion gas, some of the smoke generating agent is too large and heavy to suspend in the air after being discharged from the smoke generating device, which affects the smoke generation effect and results in waste of the smoke generating agent. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model aims to provide a smoke generating device employing a two-stage swirling air atomizing nozzle. This solves the problem in existing high-power smoke generating devices where the smoke generating agent forms a smoke screen directly without atomization, resulting in excessively large and heavy particles that cannot suspend in the air, thus reducing the smoke generating effect and causing waste of the smoke generating agent.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A smoke generating device employing a two-stage swirling air atomizing nozzle is provided, comprising a micro turbojet engine nozzle and a smoke generating nozzle disposed on the outlet side of the micro turbojet engine nozzle. An atomizing device is disposed inside the smoke generating nozzle for atomizing a smoke generating agent, and the outlet of the atomizing device is disposed in the same direction as the outlet of the smoke generating nozzle.

[0006] In the above technical solution, the basic principle of the smoke generating device is as follows: During operation, the micro turbojet engine serves as the power source for smoke generation. The high-temperature, high-pressure, and high-speed airflow generated by the turbine outlet of the micro turbojet engine enters through the inlet of the smoke generating nozzle. The smoke generating agent enters the atomizing device, which fully atomizes the smoke generating agent and discharges it into the smoke generating nozzle, effectively improving the smoke generation effect. The atomized smoke generating agent is fully mixed with the airflow and discharged from the outlet of the smoke generating nozzle, forming a large-scale smoke screen in a short time.

[0007] Furthermore, as a specific configuration of the atomizing device, the atomizing device includes an annular body disposed inside the smoke-generating nozzle, the axis of the annular body coinciding with the axis of the smoke-generating nozzle, a smoke-generating agent channel being disposed within the inner wall of the annular body, the outlet end of the smoke-generating agent channel being connected to the air outlet end face of the annular body; a smoke-generating agent inlet pipe being disposed on the outer circumferential wall of the annular body, one end of the smoke-generating agent inlet pipe communicating with the smoke-generating agent channel, and the other end passing through the smoke-generating nozzle and communicating with an external smoke-generating agent pumping device;

[0008] The annular body has a first-stage axial air swirl impeller inside and a second-stage axial air swirl impeller at the air outlet end of the annular body. The first-stage axial air swirl impeller and the second-stage axial air swirl impeller rotate in opposite directions.

[0009] The basic principle of the atomizing device is as follows: the smoke generator enters the smoke generator channel through the smoke generator inlet pipe and is discharged at the outlet end of the smoke generator channel. The discharged smoke generator is broken and atomized under the shearing action of two airflows with opposite directions formed by the first-stage axial air swirl blades and the second-stage axial air swirl blades. The atomized smoke generator is fully mixed with the airflow and discharged from the smoke generator nozzle outlet.

[0010] Furthermore, as a specific arrangement of the annular body, the annular body includes an inner ring body and an outer ring body arranged coaxially at intervals. One end of the inner ring body and the outer ring body are sealed and connected, while the other end is not sealed. The interval between the inner ring body and the outer ring body is the smoke-generating agent channel. The first-stage axial air swirl impeller is disposed inside the inner ring body. The second-stage axial air swirl impeller is disposed on the other end face of the outer ring body.

[0011] Furthermore, a flow guide is provided on the outlet end face of the annular body. The flow guide is used to guide the smoke-generating agent in the smoke-generating agent channel to the axial direction of the annular body. The function of the flow guide is to form a reflux zone at the outlet end of the annular body. The reflux zone allows the smoke-generating agent to remain in the annular body for a longer time, enabling the smoke-generating agent to fully exchange momentum and heat with the airflow, thereby further atomizing and evaporating, and effectively improving the smoke generation effect.

[0012] Furthermore, the diameter of the inlet end of the smoke-generating nozzle is smaller than the diameter of the outlet end. This configuration ensures that the airflow velocity at the inlet end of the smoke-generating nozzle is greater than the airflow velocity at the outlet end, thereby allowing the atomized smoke agent to remain within the annular body for a longer period of time.

[0013] Furthermore, a shroud is fitted around the second-stage axial air swirl impeller, with one side of the shroud facing the inlet direction of the smoke-generating nozzle and the other side facing the outlet axis direction of the smoke-generating nozzle.

[0014] Furthermore, the diameter of the inlet end of the annular body is larger than the diameter of the outlet end of the annular body. This configuration accelerates the airflow passing through the annular body, allowing for better atomization and fragmentation of the smoke-generating agent discharged from the outlet end of the smoke-generating agent channel.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a smoke generating device using a dual-stage swirling air atomizing nozzle. By setting an atomizing device inside the smoke generating nozzle, the smoke generating agent is fully atomized, which effectively improves the smoke generating effect. The atomized smoke generating agent is fully mixed with the airflow and discharged from the outlet of the smoke generating nozzle, forming a large-scale smoke screen in a short time. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a smoke generating device employing a two-stage swirling air atomizing nozzle.

[0017] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the smoke-generating nozzle.

[0018] Figure 3 This is an enlarged cross-sectional view of the atomizing device.

[0019] Among them, 1. Micro turbojet engine nozzle; 2. Smoke-generating nozzle; 3. Atomizing device; 4. Annular body; 401. Inner ring body; 402. Outer ring body; 5. Smoke-generating agent channel; 6. Smoke-generating agent inlet pipe; 7. First-stage axial air swirl impeller; 8. Second-stage axial air swirl impeller; 9. Draft shield; 10. Fairing. Detailed Implementation

[0020] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All inventions utilizing the concept of this utility model are protected.

[0021] like Figures 1-2 As shown, this utility model provides a smoke generating device using a two-stage swirling air atomizing nozzle, which includes a micro turbojet engine nozzle 1 and a smoke generating nozzle 2 disposed on the outlet side of the micro turbojet engine nozzle 1. An atomizing device 3 is disposed inside the smoke generating nozzle 2, which is used to atomize the smoke generating agent. The outlet of the atomizing device 3 is arranged in the same direction as the outlet of the smoke generating nozzle 2.

[0022] In the above technical solution, the basic principle of the smoke generating device is as follows: During operation, the micro turbojet engine serves as the power source for smoke generation. The high-temperature, high-pressure, and high-speed airflow generated at the turbine outlet of the micro turbojet engine flows out of the micro turbojet engine nozzle 1 and enters through the inlet of the smoke generating nozzle 2. The smoke generating agent enters the atomizing device 3, which fully atomizes the smoke generating agent and discharges it into the smoke generating nozzle 2, effectively improving the smoke generation effect. The atomized smoke generating agent is fully mixed with the airflow and discharged from the outlet of the smoke generating nozzle 2, forming a large-scale smoke screen in a short time.

[0023] like Figure 3 As shown, in one specific configuration of the atomizing device 3, the atomizing device 3 includes an annular body 4 disposed inside the smoke-generating nozzle 2. The axis of the annular body 4 coincides with the axis of the smoke-generating nozzle 2. A smoke-generating agent channel 5 is disposed in the inner annular body 401 of the wall layer of the annular body 4. The outlet end of the smoke-generating agent channel 5 is connected to the air outlet end face of the annular body 4. A smoke-generating agent inlet pipe 6 is disposed on the outer circumferential wall of the annular body 4. One end of the smoke-generating agent inlet pipe 6 is connected to the smoke-generating agent channel 5, and the other end passes through the smoke-generating nozzle 2 and is connected to an external smoke-generating agent pumping device.

[0024] The annular body 4 is equipped with a first-stage axial air swirl impeller 7 inside, and a second-stage axial air swirl impeller 8 is provided at the air outlet end of the annular body 4. The first-stage axial air swirl impeller 7 and the second-stage axial air swirl impeller 8 rotate in opposite directions.

[0025] The basic principle of the atomizing device 3 is as follows: the smoke generator enters the smoke generator channel 5 through the smoke generator inlet pipe 6 and is discharged at the outlet end of the smoke generator channel 5. The discharged smoke generator is broken and atomized under the shearing action of two airflows with opposite directions formed by the first-stage axial air swirl blade and the second-stage axial air swirl blade. The atomized smoke generator is fully mixed with the airflow and discharged from the outlet of the smoke generator nozzle 2.

[0026] Specifically, as one specific arrangement of the annular body 4, the annular body 4 includes an inner ring body 401 and an outer ring body 402 coaxially spaced apart. One end of the inner ring body 401 and the outer ring body 402 are sealed together, while the other end is not sealed. The interval between the inner ring body 401 and the outer ring body 402 is the smoke-generating agent channel 5. The first-stage axial air swirl impeller 7 is disposed inside the inner ring body 401. The second-stage axial air swirl impeller 8 is disposed on the other end face of the outer ring body 402.

[0027] Preferably, but not limited to, the outlet end face of the annular body 4 is provided with a guide shroud 9. The guide shroud 9 is used to guide the smoke-generating agent in the smoke-generating agent channel 5 to the axial direction of the annular body 4. The function of the guide shroud 9 is to form a reflux zone at the outlet end of the annular body 4. The reflux zone allows the smoke-generating agent to remain in the annular body 4 for a longer time, allowing the smoke-generating agent to fully exchange momentum and heat with the airflow, thereby further atomizing and evaporating, and effectively improving the smoke generation effect.

[0028] Preferably, the diameter of the inlet end of the smoke-generating nozzle 2 is smaller than the diameter of the outlet end of the smoke-generating nozzle 2. This arrangement ensures that the airflow velocity at the inlet end of the smoke-generating nozzle 2 is greater than the airflow velocity at the outlet end of the smoke-generating nozzle 2, further enabling the atomized smoke-generating agent to remain within the annular body 4 for a longer period of time.

[0029] Specifically, a shroud 10 is fitted around the second-stage axial air swirl impeller 8. One side of the shroud 10 is positioned towards the inlet direction of the smoke-generating nozzle 2, and the other side is positioned towards the outlet axis direction of the smoke-generating nozzle 2.

[0030] Furthermore, the diameter of the inlet end of the annular body 4 is larger than the diameter of the outlet end of the annular body 4. This arrangement accelerates the airflow passing through the annular body 4, thereby better breaking down and atomizing the smoke-generating agent discharged from the outlet end of the smoke-generating agent channel 5.

[0031] In summary, the smoke generating device of this utility model, which adopts a two-stage swirling air atomizing nozzle, effectively improves the smoke generating effect by setting an atomizing device 3 inside the smoke generating nozzle 2 to fully atomize the smoke generating agent. The atomized smoke generating agent is fully mixed with the airflow and discharged from the outlet of the smoke generating nozzle 2, forming a large-area smoke screen in a short time.

Claims

1. A smoke-generating device employing a two-stage swirling air atomizing nozzle, characterized in that, It includes a micro turbojet engine nozzle and a smoke-generating nozzle disposed on the outlet side of the micro turbojet engine nozzle. The smoke-generating nozzle is equipped with an atomizing device inside, which is used to atomize the smoke-generating agent. The outlet of the atomizing device is arranged in the same direction as the outlet of the smoke-generating nozzle. The atomizing device includes an annular body disposed inside the smoke-generating nozzle, the axis of the annular body coinciding with the axis of the smoke-generating nozzle, a smoke-generating agent channel being disposed within the inner wall of the annular body, the outlet end of the smoke-generating agent channel being connected to the air outlet end face of the annular body; a smoke-generating agent inlet pipe being disposed on the outer circumferential wall of the annular body, one end of the smoke-generating agent inlet pipe being connected to the smoke-generating agent channel, and the other end passing through the smoke-generating nozzle and being connected to an external smoke-generating agent pumping device; The annular body has a first-stage axial air swirl impeller inside and a second-stage axial air swirl impeller at the air outlet end of the annular body. The first-stage axial air swirl impeller and the second-stage axial air swirl impeller rotate in opposite directions.

2. The smoke generating device employing a two-stage swirling air atomizing nozzle according to claim 1, characterized in that, The annular body includes an inner ring body and an outer ring body that are coaxially spaced apart. One end of the inner ring body and the outer ring body are sealed and connected, while the other end is not sealed. The gap between the inner ring body and the outer ring body is the smoke-generating agent channel. The first-stage axial air swirl impeller is disposed inside the inner ring body. The second-stage axial air swirl impeller is disposed on the other end face of the outer ring body.

3. The smoke generating device employing a two-stage swirling air atomizing nozzle according to claim 1, characterized in that, The annular body has a flow guide shroud on its outlet end face, which is used to guide the smoke-generating agent in the smoke-generating agent channel to the axial direction of the annular body.

4. The smoke generating device employing a two-stage swirling air atomizing nozzle according to claim 1, characterized in that, The diameter of the inlet end of the smoke-generating nozzle is smaller than the diameter of the outlet end of the smoke-generating nozzle.

5. The smoke generating device employing a two-stage swirling air atomizing nozzle according to claim 4, characterized in that, The second-stage axial air swirl impeller is fitted with a shroud, with one side of the shroud facing the inlet direction of the smoke-generating nozzle and the other side facing the outlet axis direction of the smoke-generating nozzle.

6. The smoke generating device employing a two-stage swirling air atomizing nozzle according to any one of claims 1 to 5, characterized in that, The diameter of the inlet end of the annular body is larger than the diameter of the outlet end of the annular body.

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