Handheld firework setting-off device based on powder combustion and eruption

Abstract

The invention discloses a handheld firework setting-off device based on powder combustion eruption. The handheld firework setting-off device comprises a handheld part, a pressure fuel containing cavity is connected with an ejector through an air outlet valve, a mixing pipe connected with the ejector is provided with an air inlet, and the handheld firework setting-off device is further provided with a powder bin for providing powder into the mixing pipe; the mixing pipe is provided with a combustion chamber, a turbulator is further arranged in the combustion chamber, and the sectional area of the combustion chamber is larger than that of an inner cavity of the mixing pipe. The combustion chamber is connected with the jet orifice and is internally provided with an igniter; a nozzle of the ejector feeds fuel ejection flow into the mixing pipe, the fuel ejection flow sucks air and powder into the mixing pipe to form mixed airflow, and the mixed airflow is ejected out of the ejection opening after being ignited by the igniter in the combustion chamber. And the firework effect presented by fireworks is completely simulated. The equipment structure is effectively simplified, and a small handheld device can be manufactured easily.

Description

Technical Field

[0001] The invention relates to a handheld fireworks setting off device which is formed by powder combustion and eruption. Background Art

[0002] In the prior art, Chinese patent documents such as publication (announcement) numbers: CN105241316A, CN105258576A, CN105371707A, CN105854317A, and CN107121022A disclose a cold flame eruption device. It is intended to replace the traditional flame ejection consisting of gunpowder emission, eliminating the need for gunpowder and eliminating safety hazards. In this series of patent documents, the combustion heating outside the wall of the feed pipe is the key factor for powder excitation and ignition to achieve cold flame eruption. Other similar products of applicants, such as "a device for emitting and controlling colored cold fireworks - Publication (Announcement) No.: CN106767189A" adopts "heating coil heating"; "a heating element device and stage cold fireworks equipment - Publication (Announcement) No.: CN216482556U" adopts "a heating module is sheathed on the outer wall of the tube for conveying metal powder"; "a gunpowder-free environmentally friendly fireworks machine - Publication (Announcement) No.: CN109000519A" adopts "the outer surface of the conveying tube is also provided with a heating ring and a heat preservation ring from the inside to the outside". All of them adopt similar powder excitation and ignition means.

[0003] In order to solve the problems of high ineffective energy consumption and monotonous color of a single device in the above-mentioned device, Chinese patent document CN108827088A discloses "a powder combustion and spraying device imitating cold light and flame effect", which preheats and conveys the powder by mixing high-pressure and high-temperature air with the powder.

[0004] However, the above-mentioned existing devices all have the following disadvantages: First, the existing devices all need to preheat the powder to achieve the fireworks eruption, and many components are required to complete the eruption, resulting in a complex device structure that is difficult to miniaturize and cannot be used for handheld ignition.

[0005] Secondly, the flow of powder between components requires coordination of the structures and movements of the components, which reduces the working reliability. For example, residual metal powder in the conveying channel can easily cause blockage after getting wet and agglomerating.

[0006] Thirdly, the existing device can only present the star effect of powder burning (referred to as sparks), while the spray fireworks can present the combination of sparks and flames (or flames), so the existing device cannot completely simulate the fireworks effect presented by fireworks.

[0007] Therefore, the existing device still needs to be improved. Summary of the invention

[0008] In order to solve the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a fireworks device based on powder combustion and eruption, which can realize fireworks eruption without preheating powder, effectively simplify the equipment structure to realize handheld ignition; effectively improve work reliability; can present a combination of sparks and flames, and completely simulate the fireworks effect presented by fireworks. In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is a handheld fireworks ignition device based on powder combustion and eruption, characterized in that it includes a handheld part and a pressure fuel chamber, the pressure fuel chamber is connected to an ejector through an air outlet valve, the ejector is connected to a mixing tube, the mixing tube is provided with an air inlet, and is also provided with a powder silo for providing powder to the mixing tube; the mixing tube is provided with a combustion chamber, the combustion chamber is also provided with a spoiler, and the cross-sectional area of ​​the combustion chamber is larger than the inner cavity of the mixing tube; the combustion chamber is connected to the injection port, and an igniter is provided in the combustion chamber; the nozzle of the ejector sends the fuel injection flow into the mixing tube, and the fuel injection flow sucks air and powder into the mixing tube to form a mixed airflow, and the mixed airflow is ejected from the injection port after being ignited by the igniter in the combustion chamber.

[0009] In the above technical solution, the fuel is a combustible liquid or a combustible gas, etc. The powder includes fireworks metal powder (such as titanium, copper, potassium, aluminum, lithium, etc.) and fireworks raw material powders such as barium salt, strontium salt, sodium salt and copper salt, and also supports the heating, ignition and eruption of traditional fireworks ingredients. The components that increase temperature, promote combustion and generate gas can be removed from the traditional fireworks ingredients, making the fireworks safer.

[0010] The cross-sectional area of ​​the combustion chamber is larger than the inner cavity of the mixing tube, which can effectively enlarge the channel. A small part of the mixed gas flow is directed to the periphery of the jet main channel to form a low-speed mixed gas flow that is easy to be ignited by the spark of the igniter, and then the entire mixed gas flow is ignited. The spoiler disturbs the mixed gas to form a low-speed gas flow that is easy to ignite in the combustion chamber.

[0011] In one embodiment, the spoiler has an intermediate channel arranged concentrically with the mixing tube, a flow splitting gap is provided at the connection portion between the intermediate channel and the mixing tube, the intermediate channel has the same diameter as the mixing tube, and a plurality of axial grooves are distributed on the peripheral side wall of the intermediate channel, so as to ensure the ignition of the spoiler and facilitate the large-scale high-speed eruption of powder and flame.

[0012] In one embodiment, the spoiler has an expansion part connecting the intermediate channel and the mixing tube, and a diversion hole is provided on the expansion part, so as to ensure the ignition of the spoiler and facilitate the large-scale high-speed eruption of powder and flame.

[0013] In one embodiment, the spoiler in the combustion chamber has a cap body that covers the port of the mixing tube, the cap body is provided with a main nozzle, and the cap body around the main nozzle is provided with a plurality of diverter holes. A small portion of the mixed airflow is guided into the combustion chamber around the main nozzle through the diverter holes, ignited by the igniter, and ejected from the injection port at the upper end of the combustion chamber.

[0014] In one embodiment, the nozzle of the ejector is arranged at the center of the mixing tube, and the side wall of the mixing tube is provided with an inlet for air and powder, so as to effectively utilize the negative pressure effect generated by the high-speed fuel ejection flow to realize powder transportation and mixing with air and fuel for ignition and eruption.

[0015] In one embodiment, the mixing tube is connected to a conical tube, an air inlet is centrally arranged in the conical tube, an annular gap between the conical tube and the air inlet constitutes a nozzle of the ejector, and a powder inlet is arranged on the side wall of the mixing tube. The negative pressure effect generated by the high-speed fuel ejection flow is effectively utilized to realize powder transportation and mixing with air and fuel for ignition and eruption.

[0016] In one embodiment, the powder silo is a gravity-type powder silo, and the powder in the powder silo falls due to its own gravity and is sucked into the mixing tube by negative pressure.

[0017] In one embodiment, a powder storage part made of porous material is provided in the powder silo. Porous materials include porous materials or wire mesh balls. Porous materials are also called foam materials, such as sponges, foams, honeycomb materials, polymer foam materials, foaming molding materials, foamed ceramics or glass, foamed metals, etc. It is beneficial for the powder in the powder silo to enter the mixing chamber in a slow-release manner. The powder storage part can completely or partially fill the inner cavity of the powder silo. When the powder silo is partially filled, the shape, size, position, etc. of the powder storage part can be arbitrarily set as needed. Further, the powder storage part has a hollow cavity running through its body. The fuel jet draws air and powder into the mixing tube through the hollow cavity. Furthermore, a port of the hollow cavity is connected to the powder inlet of the mixing tube.

[0018] In one embodiment, the handheld portion is provided with a button corresponding to the ignition of the igniter and the opening of the outlet valve. The operation button can realize the linkage between the ignition action of the igniter and the opening action of the outlet valve, such as the button mechanism of a lighter, such as a disposable lighter, a windproof lighter, etc.

[0019] In one embodiment, the handheld fireworks device comprises a gun-shaped body, which comprises a gun handle, a gun barrel, and a trigger, wherein the gun handle constitutes the hand-held part; an ejector and a mixing tube are arranged in the gun barrel, wherein the mixing tube is provided with a combustion chamber and a spoiler, and the mixing tube is provided with an air inlet; a powder silo for providing powder to the mixing tube is installed on the gun barrel; the injection port is close to the muzzle; a pressure fuel chamber is arranged on the gun-shaped body, and the trigger is pressed to realize the linkage between the ignition action of the igniter and the opening action of the air outlet valve, and an ignition head of the igniter is arranged in the combustion chamber; and the mixed air flow is ejected from the muzzle after being ignited by the ignition head in the combustion chamber. Furthermore, a powder storage part made of porous material or foam material is filled in the powder silo in the shape of a bullet, and the powder storage part has a hollow cavity running through its body, and the front and rear ports of the bullet are arranged corresponding to the front and rear ports of the hollow cavity, the front port of the hollow cavity is connected to the powder inlet of the mixing tube, and the rear port of the hollow cavity is open.

[0020] In one embodiment, the gravity-type powder silo is provided with a baffle switch to control the discharge of the silo, and the gun-shaped body is provided with a manually reciprocating holster, and the baffle switch reciprocates with the holster to increase the fun.

[0021] In one embodiment, a powder leakage mechanism is provided at the bottom of the gravity powder silo, and the powder is caused to fall from the powder leakage mechanism and enter the mixing tube by the vibration of the igniter. The powder leakage mechanism, such as a mesh screen or other similar powder leakage mechanisms, can replace the material discharge control switch.

[0022] The beneficial effects of the present invention are: the Bernoulli principle is applied to the fireworks device composed of powder combustion and eruption for the first time, the fuel is ejected at an ultra-high speed through the ejection device, a relative negative pressure can be formed on the air flow channel of the mixing tube to "suck" the air and powder in, and fully mix with the fuel, react violently and burn, the high temperature formed by the flame makes the gas expand more, the pressure increases, and the flame and the ignited powder are ejected at a higher speed at the same time, which can present a combination of sparks and flames (or flames), completely simulating the fireworks effect presented by fireworks. Fireworks eruption can be achieved without preheating the powder, no additional wind source, heat source and power source are required, the equipment structure is effectively simplified, and it is conducive to the production of small handheld devices, especially for fireworks ejection toys that imitate the appearance and operation of firearms, or lighters with fireworks ejection effects.

[0023] In the eruption ignition tube, the fuel, air and powder are fully mixed, can be directly ignited and ejected at high speed, the temperature of the flame is between 280 and 1800℃, and can ignite most of the fireworks metal powders on the market (such as titanium, copper, potassium, aluminum, lithium, etc.) and fireworks raw material powders such as barium salts, strontium salts, sodium salts and copper salts. The powder is between 1 and 3000 meshes, and the corresponding mesh powder is selected according to the needs. The smaller the powder, the larger the surface area per unit volume, so that the powder is ignited between 300 and 1500℃. At the same time, it also supports the ignition and eruption of traditional fireworks ingredients; therefore, it can display cold light fireworks and fireworks effects with a variety of flame colors.

[0024] The igniter can be any device that generates sparks or electric sparks, preferably electronic pulse ignition or piezoelectric ceramic ignition.

[0025] The device can realize the eruption of simulated fireworks without electrical or mechanical drive, and has the advantages of simple and compact structure, low cost and easy maintenance.

[0026] It can work in harsh environments such as high temperature, high pressure, strong magnetic field, etc., and has strong anti-interference ability.

[0027] The fireworks-like eruption equipment using this technical solution can be large or medium-sized eruption equipment placed on the ground, and it is also convenient to produce small handheld eruption device products through miniaturization, especially fireworks toys that imitate the appearance and operation of firearms.

[0028] The high-speed fuel jet forms a negative pressure zone above the nozzle, and the surrounding oxygen supply is insufficient. At this time, it is difficult to ignite the fuel fluid with a very high flow rate, effectively preventing the flashback phenomenon and effectively ensuring safety. In a preferred embodiment, a one-way valve can also be set on the fuel pipeline.

[0029] The device of the present invention can display cold light fireworks and firework effects of various flame colors, has the advantages of rapid ignition, good uniformity of ejection speed, simple structure, safety and reliability, and the ejected fuel rises with the hot air during combustion, so that the burning powder is carried to a higher and farther place.

[0030] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time.

[0031] In the description of this specification, the description of reference terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. When an element is referred to as "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structural principle of Example 1;

[0033] Figure 2 It is a schematic diagram of the partial structural principle of Example 1 (including a schematic diagram of the top view of the powder silo 61);

[0034] Figure 3 Schematic diagram of the combined enlarged structure of the mixing tube, combustion chamber and spoiler of Example 1 Figure 1 ;

[0035] Figure 4 Schematic diagram of the combined enlarged structure of the mixing tube, combustion chamber and spoiler of Example 1 Figure 2 ;

[0036] Figure 5 The combined partial cross-sectional enlarged structure diagram of the mixing tube, combustion chamber and spoiler of Example 1 Figure 1 ;

[0037] Figure 6 The combined partial cross-sectional enlarged structure diagram of the mixing tube, combustion chamber and spoiler of Example 1 Figure 2 ;

[0038] Figure 7 It is a schematic diagram of the enlarged structure of the middle channel, axial groove and ring body of the spoiler of Example 1;

[0039] Figure 8 It is a schematic diagram of the enlarged structure of the axial groove and the ring body combination of the spoiler of Example 1;

[0040] Fig. 9 This is a schematic diagram of the ejector structure of Example 2;

[0041] Fig.10 Schematic diagram of the spoiler structure of Example 3;

[0042] Fig.11 is a schematic diagram of the spoiler structure of Example 4;

[0043] Fig.12 This is a schematic diagram of the overall structure of Example 5;

[0044] Fig.13 It is a schematic diagram of the partial structural principle of Example 5;

[0045] Fig.14 This is a schematic diagram of the overall structure of Example 6;

[0046] Fig.15 This is a schematic diagram of the partial structural principle of Example 6;

[0047] Fig.16 This is a schematic diagram of the overall structure of Example 7;

[0048] Fig.17 It is a schematic diagram of the partially enlarged structural principle of Example 7;

[0049] Fig.18 is a schematic structural diagram of Example 8;

[0050] Fig.19 is a schematic structural diagram of Example 9;

[0051] Fig. 20 is a schematic structural diagram of Example 10;

[0052] Fig.21 is a schematic structural diagram of Example 11;

[0053] Fig. 22 is a schematic structural diagram of Example 12;

[0054] Fig.23 It is a schematic diagram of the separation structure of the pressure fuel chamber and the gun-shaped body in Example 13;

[0055] Fig.24 This is a schematic diagram of the combined structure of the pressure fuel chamber and the gun-shaped body of Example 13. DETAILED DESCRIPTION

[0056] Example 1: See attached Figure 1-8, reflecting a specific structure of the present invention. The handheld fireworks setting off device based on powder combustion and eruption includes a gun-shaped body, which includes a gun handle 75, a gun barrel, and a trigger 66 constituting a handheld part, and also includes a pressure fuel chamber 64, and the pressure fuel chamber 64 is connected to the ejector 63 through an outlet valve 71 and a conduit 69. It also includes a mixing tube 111 connected to the ejector 63, and the mixing tube 111 is provided with an air inlet 62, and a powder silo 61 for providing powder to the mixing tube 111. In the example, the powder discharge port is also set at the air inlet 62, and air and powder are input at the same time. In other embodiments, the powder discharge port and the air inlet can also be set separately.

[0057] In the example, the mixing tube 111 above the air inlet 62 is provided with a combustion chamber 108, and the cross-sectional area of ​​the combustion chamber 108 is larger than the inner cavity of the mixing tube 111; the open end of the combustion chamber 108 is a jet port. The combustion chamber 108 is made of ceramic material. The cross-sectional area of ​​the combustion chamber 118 is larger than the cross-sectional area of ​​the inner cavity of the mixing tube 111, which can effectively increase the passage, and a small part of the mixed airflow is diverted to the surroundings of the main jet channel, forming a low-speed mixed airflow that is easy to be ignited by the spark of the ignition head 115 of the igniter 65, thereby igniting the entire mixed airflow.

[0058] In the example, a spoiler 109 is further provided in the combustion chamber 108. The function of the spoiler 109 is to disrupt the mixed gas to form a low-speed airflow that is easy to ignite in the combustion chamber. Various known structures that can achieve the function of disrupting the airflow can be used to form an irregular area of ​​airflow density in the combustion chamber, consume a small part of the fluid kinetic energy, and reduce its flow rate for easy ignition.

[0059] In the example, the spoiler 109 has an intermediate channel 117 that is concentrically arranged with the mixing tube 111. The connecting portion of the intermediate channel 117 and the mixing tube 111 is provided with a diversion gap 118, which guides a small part of the mixed airflow into the combustion chamber 108 around the intermediate channel 117, the main jet channel. In the example, the intermediate channel 117 has the same diameter as the mixing tube 111, which ensures the turbulent ignition while facilitating the large-scale high-speed eruption of powder and flame. In the example, a number of axial grooves 119 are evenly distributed on the outer peripheral side wall of the intermediate channel 117 to regulate the flow direction of the diverted airflow and avoid powder retention. In the example, the outer peripheral ring body 120 of the axial groove 119 blocks the airflow to facilitate ignition.

[0060] An ignition head 115 of the piezoelectric igniter 65 is arranged in the combustion chamber 108 .

[0061] The gun barrel is provided with an ejector 63, a mixing tube 111 and a combustion chamber 108 thereof and a spoiler, and a powder silo 61 is installed on the gun barrel; the injection port is close to the muzzle.

[0062] In the example, the powder silo 61 is filled with a powder storage part made of porous material or foam material. Porous materials or foam materials include sponges, foams, honeycomb materials, polymer foam materials, foamed molding materials, foamed ceramics or glass, foamed metals, etc. Powder is stored in the porous structure of the powder storage part. The powder storage part has a hollow cavity 68 that runs through its body. The lower port of the hollow cavity 68 is connected to the powder inlet of the mixing tube, namely the air inlet 62. Each time the fuel jet flow 78 passes under the air inlet 62, a relative negative pressure is generated. The negative pressure draws the outside air into the mixing tube through the air inlet 62 and the lower port of the hollow cavity. The airflow formed by the outside air carries part of the powder in the porous structure of the hollow cavity 68 into the mixing tube. The remaining powder in the porous structure is disturbed and the flow is redistributed. The next airflow can also take away part of the powder. This operation is carried out in sequence, so it is beneficial for the powder in the powder silo to enter the mixing chamber in a slow-release manner. When no more powder enters the mixing tube, a new powder silo 61 can be replaced, and the replaced powder silo can be refilled with powder for recycling.

[0063] In other embodiments, the powder silo 61 may be a gravity-type powder silo, and the powder in the powder silo falls due to its own gravity and is sucked into the mixing tube by negative pressure.

[0064] The pressure fuel chamber 64 is arranged on the gun-shaped body, in the example, in the gun barrel, and in other embodiments, it can also be arranged in the gun handle 75. In one embodiment, the hand-held part is provided with a button corresponding to the hand-held part, and the button controls the ignition of the igniter and the opening of the outlet valve. The operation button can realize the linkage of the ignition action of the igniter and the opening action of the outlet valve. For example, the button mechanism of a lighter, the lighter can be a disposable lighter, a windproof lighter, etc.

[0065] Pulling the trigger 66 drives the piezoelectric igniter 65 to ignite, and outputs the ignition to the ignition head 115 through the wire 70; at the same time, the trigger 66 drives the outlet valve 71 to open; the fuel in the pressure fuel chamber 64 enters the ejector 63 through the outlet valve 71 and the conduit 69, and the nozzle 116 of the ejector 63 delivers the fuel ejection flow 78 into the mixing tube 111, and the fuel ejection flow 78 draws air and powder into the mixing tube 111 to form a mixed flow, which is ignited by the ignition head 115 in the combustion chamber 108 and then ejected from the injection port and the muzzle.

[0066] A powder storage bottle 76 is also housed within the gun-shaped body.

[0067] Example 2: See attached Fig. 9, reflecting another specific structure of the ejector of the present invention. The difference from Example 1 is that the mixing tube 201 is connected to the tapered tube 202, an air inlet 203 is centrally arranged in the tapered tube 202, an annular gap 204 between the tapered tube 202 and the air inlet 203 constitutes the nozzle of the ejector, the pressure fuel chamber is connected to the inner cavity of the tapered tube 202 through the conduit 207, and the fuel ejection flow is sent into the mixing tube 201 through the nozzle formed by the annular gap 204.

[0068] The side wall of the mixing tube 201 is provided with a powder feed port 205, which is connected to a powder hopper 206. The negative pressure effect generated by the high-speed fuel jet flow is effectively utilized to realize powder transportation and mixing with the air sucked in by the air inlet 203 and the fuel jet flow to ignite and erupt.

[0069] In other embodiments, the powder feed port 205 may also be disposed within the air inlet 203 .

[0070] Example 3: See attached Fig.10 , reflecting another specific structure of the spoiler of the present invention. The difference from Example 2 is that the spoiler has a pipe expansion part 303, the pipe expansion part 303 connects the middle channel 301 and the mixing tube 302, and a diverter hole 304 is provided on the pipe expansion part 303. A small part of the mixed airflow is guided into the combustion chamber 305 around the middle channel 301 through the pipe expansion part 303 and its diverter hole 304, ignited by the ignition head 306, and ejected from the injection port at the upper end of the combustion chamber 305. The purpose of ensuring the ignition of the spoiler can also be achieved, and at the same time, it is conducive to the large-scale high-speed eruption of powder sparks and flames after the mixed air is ignited.

[0071] Example 4: See attached Fig.11 , reflecting another specific structure of the spoiler of the present invention. The difference from Example 2 is that the spoiler in the combustion chamber 403 has a cap body 406 that covers the port of the mixing tube 401, and a main nozzle 404 is centrally arranged on the cap body 406, and a plurality of diverter holes 405 are arranged on the cap body around the main nozzle 404. A small part of the mixed airflow is guided into the combustion chamber 403 around the main nozzle 404 through the diverter holes 405, ignited by the ignition head 402, and ejected from the injection port at the upper end of the combustion chamber 403. The purpose of ensuring spoiler ignition can also be achieved.

[0072] Example 5: See attached Figure 12-13 , reflecting another specific structure of the present invention. The difference from Example 1 is that the gun-shaped body is a revolver style, and its bullet 601 is set as a powder silo. The hollow powder silo in the shape of a bullet is filled with a powder storage member made of porous material or foam material, such as a sponge filled with metal powder. The sponge can be in any shape and can be squeezed and compressed.

[0073] The powder storage part has a hollow cavity running through its body, and the front port 606 and the rear port 602 of the bullet 601 are arranged corresponding to the front and rear ports of the hollow cavity, the front port 606 is connected to the powder inlet of the mixing tube 605 through the conduit 607, and the rear port 602 is open for air to enter. Pull the trigger 603 to release the fuel in the pressure fuel chamber 604 and ignite it.

[0074] In the example, each hollow powder silo in the shape of a bullet 601 can be filled with different metal powders; the rotation of a revolver can be simulated, and powder silos in different bullet shapes can be switched to produce different cold light flower effects, increasing the fun.

[0075] Example 6: See attached Figure 14-15 , reflecting another specific structure of the present invention. The difference from Example 1 is that the example uses a gravity powder silo 81, which can use the gravity of the powder itself to discharge the powder into the mixing tube 83 through the discharge channel 86, and powder transportation can be achieved without a powder storage member made of porous or foam materials. According to the required amount of powder, the size, length and shape of the discharge channel 86 are adjusted to achieve quantitative discharge; the discharge amount can also be adjusted by the discharge adjustment knob to achieve adjustable quantitative discharge, without the need for an additional power source, to achieve automatic and continuous quantitative discharge control.

[0076] In the example, the mixing tube 83 and its combustion chamber, spoiler, ejector and other combustion and ejection components are combined in a cylinder or a cuboid, which is suitable for installation at the front end of any type of gun barrel, and cooperates with the trigger 85, the pressure fuel chamber 84 and its control valve and guide tube and other ignition and control components, and is suitable for all gun-type bodies with similar appearance.

[0077] Example 7: See attached Figure 16-17 , reflecting another specific structure of the present invention. The difference from Example 6 is that the gravity powder silo 91 is provided with a baffle switch 92 to control the silo discharge port, and the gun-shaped body is provided with a manually reciprocating holster 93, and the baffle switch 92 reciprocates with the holster 93. Pulling the holster 93 and the baffle switch 92 once opens the silo discharge port once, and the powder falls into the mixing tube. Pulling the trigger can ignite and complete a fireworks spray, which increases the fun.

[0078] In other embodiments, the bottom discharge port of the gravity powder silo is provided with a powder leakage mechanism such as a mesh screen. The vibration of the ignition of the igniter causes the powder to fall from the powder leakage mechanism and enter the mixing tube. The powder leakage mechanism can replace the discharge control switch.

[0079] Example 8: See attached Fig.18, reflecting another specific structure of the present invention. The difference from Example 6 is that the powder silo 10 with a slender ring structure surrounding the mixing tube effectively reduces the space occupied by the silo, and is particularly suitable for slender cylindrical cavities, such as gun barrels, and is suitable for use in small and micro fireworks devices.

[0080] Example 9: See attached Fig.19 , reflecting another specific structure of the present invention. In this example, the following components are included: 21 combustion chamber; 22. spoiler; 23. mixing tube; 24. air inlet; 25. ejector; 26. ignition head; 27. ignition wire; 28. powder storage; 29. ​​positioning member; 30. expansion tube. The difference from Example 1 is that the mixing tube 23 in the example is provided with an expansion tube 30 as a powder silo, and a powder storage member 28 made of porous material or foam material is arranged in the expansion tube 30, such as a sponge for absorbing and storing powder, and the powder storage member 28 is positioned in the expansion tube by the positioning member 29. The hollow cavity of the powder storage member 28 constitutes a component of the airflow channel of the mixing tube 23. The nozzle of the ejector 25 delivers the fuel jet into the mixing tube 23, and the fuel jet draws the powder in the powder storage 28 into the mixing tube 23, and together with the air sucked in by the air inlet 24, it forms a mixed airflow, which is ignited by the ignition head 26 in the combustion chamber 21 and then ejected from the injection port.

[0081] Example 10: See attached Fig. 20 , reflecting another specific structure of the present invention. The characteristic of the example is that the sight 31 of the gun-shaped body is used as a powder silo. In the example, the amount of powder discharge can be adjusted by the knob on the sight 31.

[0082] Example 11: See attached Fig.21 , reflecting another specific structure of the present invention. The characteristic of the example is that the bullet clip 32 of the gun-shaped body is used as a powder silo. The gun-shaped body in the example is a Gatling gun style. It can be applied to other gun bodies and can be used as a combination of different gun models.

[0083] Example 12: See attached Fig. 22 , reflecting another specific structure of the present invention. The characteristic of the example is that the powder silo 35 and its accessories, the ejector and its fuel release valve 34, the pressure fuel chamber 33, etc. are arranged in a straight line, which is convenient for installation in a straight inner cavity, such as a gun barrel.

[0084] Example 13: See attached Fig.24 , 23 , reflecting another specific structure of the present invention. In this example, the following components are included: 801. replaceable powder silo; 802. air inlet; 803. ejection and injection combustion assembly; 804. pressure fuel chamber; 805. push-to-ignite assembly; 806. fuel control assembly.

[0085] The characteristic of the example is that the pressure fuel chamber 804 and the gun-shaped body are detachably connected to facilitate replacement.

[0086] The fuel release action of the fuel control component 806 and the ignition action of the push-to-ignite component 805 can be controlled separately.

[0087] The fuel control assembly 806 can adjust the fuel gas flow size or injection rate.

[0088] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and describes these embodiments in detail in conjunction with the accompanying drawings in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. 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 violating the connotation of the present invention. Therefore, the present invention is only limited by the claims and their full scope and equivalents, and is not limited by the specific embodiments disclosed.

Claims

1. A handheld fireworks device based on powder combustion and eruption, characterized in that: It includes a handheld part and a pressure fuel chamber, which is connected to an ejector through an air outlet valve, and the ejector is connected to a mixing tube. The mixing tube is provided with an air inlet and a powder silo for providing powder to the mixing tube. The mixing tube is provided with a combustion chamber, and a spoiler is also provided in the combustion chamber, and the cross-sectional area of ​​the combustion chamber is larger than the inner cavity of the mixing tube. The combustion chamber is connected to the injection port, and an igniter is provided in the combustion chamber. The nozzle of the ejector sends a fuel injection flow into the mixing tube, and the fuel injection flow sucks air and powder into the mixing tube to form a mixed flow, which is ignited by the igniter in the combustion chamber and then ejected from the injection port.

2. A handheld fireworks device based on powder combustion and eruption as claimed in claim 1, characterized in that: The spoiler has an intermediate channel arranged concentrically with the mixing tube, a diversion gap is arranged at the connection portion between the intermediate channel and the mixing tube, the intermediate channel has the same diameter as the mixing tube, and a plurality of axial grooves are distributed on the peripheral side wall of the intermediate channel.

3. A handheld fireworks device based on powder combustion and eruption as claimed in claim 1, characterized in that: The spoiler has a pipe expansion portion communicating with the intermediate channel and the mixing tube, and a flow diversion hole is arranged on the pipe expansion portion.

4. A handheld fireworks device based on powder combustion and eruption as claimed in claim 1, characterized in that: The spoiler in the combustion chamber is provided with a cap body for covering the port of the mixing tube, a main nozzle is arranged on the cap body, and a plurality of flow diversion holes are arranged on the cap body around the main nozzle.

5. A handheld fireworks device based on powder combustion and eruption as described in any one of claims 1 to 4, characterized in that: The nozzle of the ejector is arranged at the center of the mixing tube, and the side wall of the mixing tube is provided with inlets for air and powder.

6. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, characterized in that: The mixing tube is connected to the conical tube, an air inlet is arranged in the center of the conical tube, an annular gap between the conical tube and the air inlet constitutes the nozzle of the ejector, and a powder inlet is arranged on the side wall of the mixing tube.

7. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, characterized in that: The powder silo is a gravity-type powder silo, and the powder in the powder silo falls due to its own gravity and is sucked into the mixing tube by negative pressure.

8. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, characterized in that: The powder silo is provided with a powder storage part made of porous material.

9. A handheld fireworks device based on powder combustion and eruption as claimed in claim 8, characterized in that: The powder reservoir has a hollow cavity extending through its body.

10. A handheld fireworks device based on powder combustion and eruption as claimed in claim 9, characterized in that: One port of the hollow cavity is connected to the powder inlet of the mixing tube.

11. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, 9 and 10, characterized in that: The handheld part is correspondingly provided with a button, and the button controls the ignition of the igniter and the opening of the air outlet valve.

12. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, 9 and 10, characterized in that: The handheld fireworks setting off device comprises a gun-shaped body, which comprises a gun handle, a gun barrel and a trigger, wherein the gun handle constitutes the hand-held part; an ejector and a mixing tube are arranged in the gun barrel, wherein the mixing tube is provided with a combustion chamber and a spoiler, and wherein the mixing tube is provided with an air inlet; a powder silo for providing powder to the mixing tube is installed on the gun barrel; the injection port is close to the muzzle; a pressure fuel chamber is arranged on the gun-shaped body, and the trigger is pressed to realize the linkage between the ignition action of the igniter and the opening action of the air outlet valve, and an ignition head of the igniter is arranged in the combustion chamber; and the mixed air flow is ejected from the muzzle after being ignited by the ignition head in the combustion chamber.

13. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, 9 and 10, characterized in that: A powder storage component made of porous material or foam material is filled in a powder silo in the shape of a bullet. The powder storage component has a hollow cavity running through its body. The front and rear ports of the bullet are arranged correspondingly to the front and rear ports of the hollow cavity. The front port of the hollow cavity is connected to the powder inlet of the mixing tube, and the rear port of the hollow cavity is open.

14. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, characterized in that: The gravity powder silo is provided with a baffle switch to control the unloading of the silo, and the gun-shaped body is provided with a manual reciprocating holster, and the baffle switch reciprocates with the holster.

15. A handheld fireworks device based on powder combustion and eruption as claimed in any one of claims 1 to 4, characterized in that: A powder leakage mechanism is arranged at the bottom of the gravity powder silo, and the vibration of ignition by the igniter is used to make the powder fall from the powder leakage mechanism and enter the mixing tube.

16. A hand-held fireworks device based on powder combustion and eruption, which is used for fireworks jet toys that imitate the appearance and operation of firearms, or lighters with fireworks jet effects.

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