WO2021208296A1

WO2021208296A1 - Firecracker device

Info

Publication number: WO2021208296A1
Application number: PCT/CN2020/106322
Authority: WO
Inventors: 周孝文; 雷镇浓; 廖宇
Original assignee: 长沙市斯帕克电子科技有限公司
Priority date: 2020-04-13
Filing date: 2020-07-31
Publication date: 2021-10-21
Also published as: CN111366040A

Abstract

The present invention relates to a firecracker device, comprising: a gas supply assembly, used to provide combustible gas; a firecracker tube assembly, having a combustion chamber formed therein to allow the combustible gas to burn; and a mixing tube, connected between the gas supply assembly and the firecracker tube assembly. A mixing chamber communicating between the gas supply assembly and the combustion chamber is formed in the mixing tube, and an air suction port communicating the mixing chamber to the exterior is provided on the mixing tube. When the combustible gas provided by the gas supply assembly flows through the mixing chamber at a high speed, negative pressure is generated in the mixing chamber, and exterior air enters the mixing chamber by means of the air suction port and mixes with the combustible gas. Finally, a combustible gas flow mixed with the exterior air enters the combustion chamber, and combusts and explodes in the combustion chamber to produce detonation, so as to achieve the effect of simulating the sound of firecrackers. The firecracker device needs only one gas supply assembly to provide combustible gas. When the combustible gas passes through the mixing tube, the combustible gas mixes with the air entering from the air suction port, such that an additional oxygen cylinder is not needed. Therefore, the overall structure is light, convenient to convey.

Description

Firecracker

Technical field

The invention relates to the technical field of firecrackers, in particular to a firecracker device.

Background technique

Firecrackers have a history of more than 2,000 years since their origins. At first, they were mainly used to exorcise evil spirits. Later, people began to use them in traditional festivals, weddings, celebrations, and major events. Because traditional firecrackers are highly dangerous, the exhaust gas generated after setting off has high environmental pollution, and major accidents are prone to occur during production, storage and transportation. Therefore, local governments have issued policies to ban the setting off of fireworks and firecrackers. After the ban, people feel that the festival is festive. The lively atmosphere is getting weaker and weaker. In recent years, in order to make up for this defect, people have begun to make environmentally friendly firecrackers to replace traditional firecrackers. The principle of this firecracker is to adjust a certain ratio of combustible gas (liquefied petroleum gas, acetylene gas, hydrogen, etc.) and oxygen into the barrel explosion chamber to mix. Reach the explosive limit of combustible gas, and then use the ignition device to ignite the mixed gas to produce explosive sound instead of traditional fireworks. However, this kind of firecracker device needs to be equipped with oxygen tanks and liquefied gas tanks, and the whole set of equipment is bulky and inconvenient to carry.

Summary of the invention

Based on this, it is necessary to provide a firecracker device to reduce weight and facilitate transportation.

A firecracker device, the firecracker device comprising:

Gas supply components, used to provide combustible gas;

The barrel assembly has a combustion chamber that allows combustible gas to burn and scream; and

A mixing tube, the mixing tube is connected between the air supply assembly and the barrel assembly, and a mixing chamber communicating between the air supply assembly and the combustion chamber is formed in the mixing tube, the The mixing pipe is provided with an air suction port connecting the mixing cavity and the outside.

In the above firecracker device, when the combustible gas provided by the air supply component flows through the mixing chamber at high speed, negative pressure is generated in the mixing chamber, and the outside air can enter the mixing chamber through the suction port to mix with the combustible gas, and finally mix with the combustible gas of the outside air. The airflow enters the combustion chamber and burns and explodes in the combustion chamber, producing a detonation, which can simulate the sound of firecrackers. In addition, the entire firecracker device only needs a set of gas supply components to provide combustible gas. When the combustible gas passes through the mixing tube, it can be mixed with the air entering from the suction port. There is no need to install additional oxygen cylinders, and the overall structure is simpler. Lighter weight and easier to carry. At the same time, when installing the firecracker device, only one set of air supply components is required, which makes the installation process easier.

In some embodiments, when the combustible gas flows through the mixing tube, the pressure formed in the mixing chamber is less than the external pressure. In order to form a negative pressure in the mixing tube, the outside air can spontaneously enter the mixing chamber from the suction port to mix with the combustible gas.

In some of the embodiments, the mixing tube includes a constricted section, a bellows, and a divergent section, the bellows is connected between the constricted section and the diffuser, and the inner diameter of the constricted section is in the constricted section. It gradually becomes smaller in the direction pointing to the roar, the inner diameter of the diverging section gradually becomes larger in the direction of the roar pointing to the diverging section, and the inner diameter of the roar is less than or equal to the minimum inner diameter of the contraction section , And the inner diameter of the roar is less than or equal to the minimum inner diameter of the diffusion section, and the suction port is opened at the roar. It is equivalent to say that the pipe diameter at the roar of the mixing tube shrinks, and the mixing tube is used as a venturi tube. According to the Venturi principle, when the combustible gas flows through the throat, the flow rate of the combustible gas will increase due to the reduction of the cross-section of the flow, which will generate negative pressure at the throat, and then the outside can be removed through the suction port on the throat. Air is drawn into the mixing chamber.

In some of the embodiments, the gas supply assembly includes a gas tank, a gas pipe, and a nozzle, one end of the gas pipe is connected to the gas tank, the other end of the gas pipe is equipped with a nozzle, and the nozzle of the nozzle extends into the Inside the mixing chamber, and the nozzle diameter of the nozzle is smaller than the diameter of the air pipe. When the combustible gas flow enters the nozzle from the gas pipe and is ejected from the nozzle, and the diameter of the nozzle is smaller, the flow velocity of the combustible gas flow ejected from the nozzle increases, and then enters the mixing chamber at a high speed.

In some of the embodiments, the nozzle includes a connecting section and a spraying section that are both hollow, the connecting section is sleeved in the air pipe, and the end of the spraying section away from the connecting section forms the nozzle, And the inner diameter of the spray section gradually shrinks in the direction in which the connecting section points to the mixing tube. In order to form a nozzle with a smaller diameter, the combustible gas flow flowing through the injection section is accelerated

In some of the embodiments, the air supply assembly further includes a connecting piece, the end of the air pipe away from the nozzle is equipped with the connecting piece, the gas tank is detachably assembled on the connecting piece, and The connecting piece communicates with the gas tank and the gas pipe.

In some of the embodiments, the gas supply assembly further includes a flashback, which is connected between the gas tank and the gas pipe, and the flashback only allows airflow from the gas tank to the gas pipe ；

The flashback includes a housing, a one-way valve core, and a filter element. The one-way valve core is movably arranged in the housing and only allows airflow from the gas tank to the air pipe. The filter element is mounted on Inside the casing and located on the flow path of the combustible gas flowing from the gas tank to the gas pipe.

In some of the embodiments, the air supply assembly further includes a solenoid valve, and the solenoid valve is provided on the air pipe for controlling the on/off of the air pipe;

The air supply assembly further includes a pressure sensor, a controller, and a reminder. The pressure sensor is arranged on the air pipe and located between the air tank and the solenoid valve, and is used to detect the air intake in the air pipe. Pressure, the controller controls the reminder to turn on when the intake pressure is less than a preset pressure.

In some of the embodiments, the barrel assembly includes a barrel and an igniter, the combustion chamber is formed in the barrel, and the igniter is mounted on the barrel and used for discharging into the combustion chamber. .

In some of the embodiments, the bottom wall of the barrel is provided with a drain hole communicating with the combustion chamber; and/or

The barrel assembly further includes a baffle, the baffle is assembled in the barrel and blocked on the ejection path of the combustion gas in the combustion chamber, and the baffle is provided with the baffle in communication with the combustion chamber Air outlet.

Description of the drawings

Figure 1 is a schematic structural diagram of a firecracker device in an embodiment of the present invention;

Figure 2 is a schematic partial cross-sectional view of the firecracker device shown in Figure 1;

Fig. 3 is a partial enlarged schematic diagram of the cross-sectional schematic diagram shown in Fig. 2;

Figure 4 is a schematic diagram of the structure of the baffle in the firecracker device shown in Figure 2;

Fig. 5 is a schematic diagram of the structure of the tempering device in the firecracker device shown in Fig. 1.

100. Firecracker device; 10. Gas supply component; 12, gas tank; 13, connecting piece; 14, gas pipe; 161, connection section; 163, injection section; 17, solenoid valve; 18, voltage regulator; 19, pressure sensor; 30, mixing tube; 31, mixing chamber; 33, suction port; 50, barrel assembly; 51, Combustion chamber; 52, barrel; 53, drainage hole; 54, igniter; 55, baffle; 56, air outlet.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "Radial", "Circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the pointed device or The element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

In the present invention, unless expressly stipulated and defined otherwise, the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. touch. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than that of the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only, and do not mean the only implementation.

Please refer to Figures 1 to 3, Figure 1 shows a schematic structural diagram of a firecracker device 100 in an embodiment of the present invention; Figure 2 shows a schematic partial cross-sectional view of the firecracker device 10 shown in Figure 1; Figure 3 shows Figure 1 A partial enlarged schematic diagram of the cross-sectional schematic diagram shown.

An embodiment of the present invention provides a firecracker device 100, which includes a gas supply assembly 10, a mixing tube 30, and a barrel assembly 50. The air supply assembly 10 is used to provide combustible gas. Cavity 51; the mixing tube 30 is connected between the air supply assembly 10 and the barrel assembly 50, and the mixing tube 30 is formed with a mixing chamber 31 communicating between the air supply assembly 10 and the combustion chamber 51, and the mixing tube 30 is provided with A suction port 33 connecting the mixing chamber 31 and the outside; when the combustible gas provided by the air supply assembly 10 flows through the mixing chamber 31 at high speed, negative pressure is generated in the mixing chamber 31, and outside air can enter the mixing chamber 31 through the suction port 33 It is mixed with combustible gas, and finally the combustible gas stream mixed with outside air enters the combustion chamber 51, and burns and explodes in the combustion chamber 51, generating a detonation, and realizing the effect of simulating the sound of firecrackers.

In addition, the entire firecracker device 100 only needs a set of gas supply assembly 10 to provide combustible gas. When the combustible gas passes through the mixing pipe 30, it can be mixed with the air entering through the suction port 33, and no additional oxygen cylinder is required. The structure is simpler, the weight is lighter, and it is more convenient to carry. At the same time, when installing the firecracker device 100, only one set of air supply assembly 10 is required, which makes the installation process easier.

Further, when the combustible gas flows through the mixing pipe 30, the pressure formed in the mixing pipe 30 is less than the external pressure, that is, negative pressure is formed in the mixing pipe 30, and the outside air can spontaneously enter the mixing chamber 31 and the combustible gas through the suction port 33. Mix it. Understandably, according to the Venturi principle, the increase in fluid flow rate is accompanied by a decrease in fluid pressure. The present invention uses this principle to pass high-speed flowing combustible gas into the mixing tube 30 to generate negative pressure in the mixing chamber 31 , And then suck in the outside air into the mixing chamber 31 through the suction port 33, automatically complete the mixing of combustible gas and air, without setting a separate oxygen cylinder for oxygen supply, simplifying the device structure and improving the convenience of use.

Optionally, the mixing tube 30 includes a constricted section, a bellows and a divergent section. The bellows is connected between the contracted section and the divergent section. The diameter of the constricted section gradually decreases in the direction in which the constricted section points to the bellows. The diameter of the divergent section The roaring channel gradually becomes larger in the direction toward the diverging section, the diameter of the roaring channel is less than or equal to the minimum diameter of the contraction section, and the diameter of the roaring channel is less than or equal to the minimum diameter of the diverging section, and the suction port 33 is opened at the roaring channel. It is equivalent to say that the pipe diameter at the roar of the mixing tube 30 is shrunk, and the mixing tube 30 is made as a venturi tube. According to the Venturi principle, when the combustible gas flows through the throat, the flow rate of the combustible gas will increase due to the reduction in the cross-section of the flow, which will generate negative pressure at the throat, which can be reduced by the suction port 33 opened on the throat. Outside air is sucked into the mixing chamber 31. In this way, using the Venturi principle, the outside air can be sucked into the mixing chamber 31 through the suction port 33 on the mixing tube 30, and the oxygen cylinder for supplying oxygen to the mixing chamber 31 is eliminated, and the overall structure of the firecracker device 100 is simplified.

The air supply assembly 10 includes a gas tank 12, a gas tube 14 and a nozzle 16. One end of the gas tube 14 is connected to the gas tank 12, and the other end of the gas tube 14 is equipped with a nozzle 16 whose nozzle extends into the mixing chamber 31. The diameter of the nozzle is smaller than the diameter of the gas pipe 14. When the combustible gas flow enters the nozzle 16 from the gas pipe 14 and is ejected from the nozzle, and the diameter of the nozzle is smaller, the flow velocity of the combustible gas flow ejected from the nozzle increases, and then enters the mixing chamber 31 at a high speed. A negative pressure is formed in the cavity 31 to absorb outside air through the suction port 33 communicating with the mixing cavity 31.

Specifically, the nozzle 16 includes a hollow connecting section 161 and a spraying section 163. The connecting section 161 is sleeved in the air pipe 14 for connecting the nozzle 16 and the air pipe 14. The end of the spraying section 63 away from the connecting section 161 forms a nozzle. In addition, the inner diameter of the injection section 163 gradually shrinks in the direction where the connecting section 161 points to the mixing tube 30 to form a nozzle with a smaller diameter, thereby accelerating the flow of combustible gas flowing through the injection section 163.

Understandably, in some embodiments, the gas supply assembly 10 includes the aforementioned nozzle 16, and the mixing tube 30 is a straight pipe. The combustible gas is accelerated by the nozzle 16 with a smaller diameter, thereby forming a negative pressure in the mixing chamber 31; in other embodiments In the example, the gas supply assembly 10 does not include the nozzle 16 described above, and the mixing tube 30 is the above-mentioned venturi tube to form a constricted roar on the mixing tube 30, and the flow rate of the combustible gas is increased by the contraction of the roar. Furthermore, a negative pressure is formed in the mixing chamber 31; in some embodiments, the gas supply assembly 10 includes the above-mentioned nozzle 16, and the mixing tube 30 is the above-mentioned Venturi tube, that is, the flow rate of the combustible gas is increased through the nozzle 16 and the venturi The inner tube further increases the flow rate of the combustible gas to achieve the purpose of forming a negative pressure in the mixing chamber 31. In other words, the flow rate of the combustible gas can be increased in the mixing chamber 31, and the location and number of the narrowing structure of the flow cross-section are not limited here.

In some embodiments, the air supply assembly 10 further includes a connecting piece 13. An end of the air inlet pipe 14 away from the nozzle 16 is equipped with a connecting piece 13. The air tank 12 is detachably assembled on the connecting piece 13, and the connecting piece 13 is connected to the air tank 12 With the air pipe 14, the air tank 12 can be assembled simply and quickly through the connecting piece 13. During the assembly process, the gas cylinder 12 can be connected to the connecting member 13 by rotating the gas cylinder 12. Optionally, the connecting member 13 is a bottle opener; the gas in the gas tank 12 is a combustible gas such as butane, acetylene, natural gas, liquefied gas, hydrogen and the like.

Further, the gas supply assembly 10 further includes a flashback 15 which is connected between the gas tank 12 and the gas pipe 14. The flashback 15 only allows the air flow from the gas tank 12 to the gas pipe 14 to prevent burning in the combustion chamber 51. The air flow returns to the gas tank 12 to protect the gas tank 12.

Please refer to FIG. 5, specifically, the flashback 15 includes a housing 151, a one-way valve core 153 and a filter 155. The one-way valve core 153 is movably arranged in the housing 151 and only allows airflow from the gas tank 12 to the air pipe 14. The one-way air pipe 14; the filter 155 is assembled in the housing 151 and is located on the flow path of the combustible gas from the gas tank 12 to the air pipe 14, to filter the impurities in the combustible gas, prevent the impurities in the combustible gas from entering the nozzle 16, and prevent the nozzle 16 is blocked by impurities in combustible gas. Optionally, the filter element 155 is a copper sintered filter element.

Please refer to Figures 1 to 4 again. Further, the air supply assembly 10 further includes a solenoid valve 17. The solenoid valve 17 is provided on the air pipe 14 for controlling the on and off of the air pipe 14, and then by controlling the opening time of the solenoid valve 17 Change the jet volume to achieve different explosion effects. In addition, the air supply assembly 10 further includes a voltage stabilizer 18, which is arranged on the air pipe 14 and is located between the solenoid valve 17 and the tempering device 15, and is used to adjust the airflow to a constant pressure to ensure a stable effect of each explosion.

Furthermore, the air supply assembly 10 further includes a pressure sensor 19, a controller, and a reminder. The pressure sensor 19 is arranged on the air pipe 14 and is located between the air tank 12 and the solenoid valve 17, and is used to detect the intake pressure in the air pipe 14. , The controller controls the reminder to turn on when the intake pressure is less than the preset pressure, and provides the user that the intake pressure in the intake pipe 14 is too low and needs to follow the air exchange tank 12.

In some embodiments, the barrel assembly 50 includes a barrel 52 and an igniter 54. A combustion chamber 51 is formed in the barrel 52. The igniter 54 is mounted on the barrel 52 and used to discharge into the combustion chamber 51 to ignite into the combustion chamber. 51 combustible gas mixed with air to produce an explosion in the barrel and form a detonation, thereby simulating the sound of firecrackers.

Furthermore, the bottom wall of the barrel 52 is provided with a drainage hole 53 communicating with the combustion chamber 51 to prevent rainwater from remaining in the combustion chamber 51 and affecting the explosion effect.

Furthermore, the barrel assembly 50 further includes a baffle 55, which is assembled in the barrel, the baffle 55 is provided with an air outlet 56 communicating with the combustion chamber 51, and the baffle 55 blocks the combustion in the combustion chamber 51 On the path of the gas eruption. When the igniter 54 discharges and ignites the combustible gas, the gas burns rapidly in the combustion chamber 51 and expands to form pressure. When the expanded gas passes through the baffle 55 inside the barrel 52, it is blocked and changes the flow pattern and forms turbulence. The turbulence flows in the barrel. The resonance formed in 52 causes the barrel 52 to make a sound. Compared with the barrel without the baffle 55, a different sound effect can be achieved. That is to say, by setting the baffle 55 in the barrel, it interferes with the flow of the expansion airflow in the barrel, and then produces sounds with different effects. Optionally, the number of the baffle plates 55 may be one piece, or may be multiple pieces spaced apart along the axial direction of the barrel, and the effect of forming a sound can be set as required, which is not limited here.

In the firecracker device 100 provided by the present invention, only one set of air supply assembly 10 is required, and then the combustible gas is doped with the outside air through the mixing tube 30, so that the combustible gas flows through the mixing tube 30 at a high speed to form a negative effect in the mixing chamber 31. The air is sucked into the mixing chamber through the suction port 33 of the mixing pipe 30 to achieve the mixing of combustible gas and air. There is no need to install an additional oxygen tank to supply oxygen, and the firecracker device is simplified. In addition, the air supply assembly 10 is provided with a nozzle 16 which has a nozzle with a smaller diameter. When the combustible gas flows through the nozzle, the flow rate increases, and then enters the mixing chamber 31 at a high speed to form a negative pressure in the mixing chamber 31. In addition, the mixing tube 30 can also be set as a venturi tube, which accelerates the flow of combustible gas through the contracted bellows, and can also reduce the pressure in the mixing chamber 31.

In addition, a number of baffles 55 are provided on the barrel 52 to form explosive sounds with different effects. At the same time, a drain port 53 is opened on the bottom wall of the barrel 52, and when rainwater enters the combustion chamber 51, it can be discharged from the drain port 53 to prevent rainwater from accumulating in the combustion chamber 51 and ensure the combustion effect of combustible gas. Optionally, the combustible gas is one of butane, acetylene, natural gas, liquefied gas, and hydrogen, which will not produce pollutants during combustion, which is more environmentally friendly.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A firecracker device, characterized in that, the firecracker device comprises:

Gas supply components, used to provide combustible gas;

The barrel assembly has a combustion chamber that allows combustible gas to burn and scream; and

A mixing tube, the mixing tube is connected between the air supply assembly and the barrel assembly, and a mixing chamber communicating between the air supply assembly and the combustion chamber is formed in the mixing tube, the The mixing pipe is provided with an air suction port connecting the mixing cavity and the outside.
The firecracker device according to claim 1, wherein when the combustible gas flows through the mixing tube, the pressure formed in the mixing chamber is less than the external pressure.
The firecracker device according to claim 1 or 2, wherein the mixing tube includes a constricted section, a roaring channel and a diverging section, and the roaring channel is connected between the constricted section and the diverging section, and the The inner diameter of the constricted section gradually becomes smaller in the direction in which the constricted section points to the roar, the inner diameter of the divergent section gradually becomes larger in the direction in which the roar points to the divergent section, and the inner diameter of the roar It is less than or equal to the minimum inner diameter of the contraction section, and the inner diameter of the roaring channel is less than or equal to the minimum inner diameter of the diverging section, and the suction port is opened at the roaring channel.
The firecracker device according to claim 1, wherein the gas supply assembly includes a gas tank, a gas pipe, and a nozzle, one end of the gas pipe is connected to the gas tank, and the other end of the gas pipe is equipped with a nozzle, so The nozzle of the nozzle extends into the mixing cavity, and the diameter of the nozzle of the nozzle is smaller than the diameter of the air pipe.
The firecracker device according to claim 4, wherein the nozzle comprises a hollow connecting section and a spraying section, the connecting section is sleeved in the air pipe, and the spraying section is away from the connecting section. One end of the nozzle forms the nozzle, and the inner diameter of the spray section gradually shrinks in the direction in which the connecting section points to the mixing tube.
The firecracker device according to claim 4, wherein the air supply assembly further comprises a connecting piece, the end of the air pipe away from the nozzle is equipped with the connecting piece, and the air tank is detachably assembled on the air pipe. On the connecting piece, and the connecting piece communicates with the gas tank and the air pipe.
The firecracker device according to claim 4, wherein the gas supply assembly further comprises a flashback, and the flashback is connected between the gas tank and the gas pipe, and the flashback only allows the air flow to pass through. The gas tank flows to the trachea;

The flashback includes a housing, a one-way valve core, and a filter element. The one-way valve core is movably arranged in the housing and only allows airflow from the gas tank to the air pipe. The filter element is mounted on Inside the casing and located on the flow path of the combustible gas flowing from the gas tank to the gas pipe.
The firecracker device according to claim 4, wherein the air supply assembly further comprises a solenoid valve, and the solenoid valve is provided on the air pipe for controlling the on and off of the air pipe;

The air supply assembly further includes a pressure sensor, a controller, and a reminder. The pressure sensor is arranged on the air pipe and located between the air tank and the solenoid valve, and is used to detect the air intake in the air pipe. Pressure, the controller controls the reminder to turn on when the intake pressure is less than a preset pressure.
The firecracker device according to claim 1, wherein the barrel assembly includes a barrel and an igniter, the combustion chamber is formed in the barrel, and the igniter is assembled on the barrel and used for Discharge into the combustion chamber.
The firecracker device according to claim 9, wherein the bottom wall of the barrel is provided with a drainage hole communicating with the combustion chamber; and/or

The barrel assembly further includes a baffle, the baffle is assembled in the barrel and blocked on the ejection path of the combustion gas in the combustion chamber, and the baffle is provided with the baffle in communication with the combustion chamber Air outlet.