Multi-flame powder combustion eruption device

Abstract

The invention discloses a multi-flame powder combustion eruption device. The multi-flame powder combustion eruption device is characterized in that a quantitative blanking powder bin is communicated with an eruption pipe through a pneumatic pipeline; the spraying pipe is provided with a spraying guide cavity, the plasma generator discharges gas in the spraying guide cavity to form a plasma arc area, and the plasma arc area and the cavity wall of the spraying guide cavity have a distance which enables the plasma arc area and the cavity wall of the spraying guide cavity not to make contact. The plasma arc region is a free arc region or a compressed arc region; powder in the powder bin is quantitatively discharged into the pneumatic pipeline, the pneumatic pipeline conveys the powder into the eruption guide cavity, and airflow drives the powder to pass through the plasma arc area and then is sprayed out of an eruption opening of the eruption guide cavity. The plasma generator controls the working temperature of the plasma arc area according to the material and particle size of the powder. And the firework effect of various flame colors can be displayed. The energy loss is effectively reduced, the heating speed is high, the temperature uniformity is good, and the energy consumption is low; the device has the advantages of simple structure, safety and reliability.

Description

Technical Field

[0001] The invention relates to a powder combustion eruption device which forms an eruption effect imitating fireworks. Background Art

[0002] In the prior art, Chinese patent documents CN105241316A, CN105258576A, CN105371707A, CN105854317A, CN107121022A, etc. disclose a cold flame spraying device, which is intended to replace the traditional cold light fireworks emitted by gunpowder, and no longer requires gunpowder to eliminate safety hazards.

[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 heats and transports the powder by mixing high-pressure and high-temperature air with the powder.

[0004] The temperature of ordinary fireworks gunpowder when burning is generally around 2000℃. After adding brightening agent, the burning temperature can reach 3000℃, so the fireworks can display fireworks effects of various flame colors.

[0005] The disadvantage of the existing equipment is that it cannot use metal powders with low melting points, such as magnesium and aluminum, which are easy to explode after heating and cause danger; nor can it use metal powders with high melting points, such as copper, because the materials used to make the equipment (iron: melting point 1535℃, steel: melting point 1515℃) cannot reach temperatures above 2000℃. Therefore, the existing equipment can only use titanium powder as raw material, which is easy to burn and presents white flames, and the existing devices can only display monotonous white fireworks. Summary of the invention

[0006] In order to solve the above disadvantages, the technical problem to be solved by the present invention is to provide a powder combustion spraying device that can display fireworks effects with various flame colors. In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A multi-flame color powder combustion and spraying device, characterized in that it comprises a powder silo for quantitative feeding, a pneumatic pipeline, a spraying pipe and a plasma generator, wherein the powder silo is connected to the spraying pipe through the pneumatic pipeline;

[0008] The ejection tube is provided with an ejection guide cavity, the plasma generator discharges to the gas in the ejection guide cavity to form a plasma arc zone, the plasma arc zone and the cavity wall of the ejection guide cavity have a distance so that the two do not contact each other; the plasma arc zone is a free arc zone or a compressed arc zone; the powder in the powder silo is quantitatively fed into the pneumatic pipeline, the pneumatic pipeline transports the powder into the ejection guide cavity, and the airflow drives the powder through the plasma arc zone and then ejects it from the ejection port of the ejection guide cavity; the plasma generator controls the working temperature of the plasma arc zone according to the material and particle size of the powder.

[0009] The beneficial effects of the present invention are:

[0010] 1. The advantage of plasma is that the eddy current is concentrated, which directly concentrates the energy in the arc area, avoiding high temperature damage to the eruption device, and making it possible to ignite and erupt metal powder with a high melting point;

[0011] Second, the powder is directly and instantly heated in the plasma arc zone and ejected immediately without the need for a heat transfer medium, which can prevent the powder from burning out or entering an incandescent state and failing to achieve the original metal combustion color;

[0012] 3. The pneumatic driving method of the powder through the plasma arc zone for instantaneous heating and immediate ejection makes the powder have better fluidity. It is very suitable for fireworks ingredients such as magnesium, aluminum and other metal powders that are easy to explode after heating, and effectively prevents explosions caused by powder aggregation and heating.

[0013] Fourth, the operating temperature range of the plasma arc zone is 1000-10000℃. After passing through the arc zone, the powder is heated to 500-5000℃, ignited and ejected. It can ignite all fireworks metal powders (such as titanium, copper, potassium, aluminum, lithium, etc.) and fireworks raw material powders such as barium salts, strontium salts, sodium salts and copper salts on the market. It also supports the heating, ignition and eruption of traditional fireworks ingredients. In traditional fireworks ingredients, the components that increase temperature, promote combustion and generate gas can be removed, making the firing safer. The powder in traditional fireworks can support the eruption and ignition of large-size pellets.

[0014] 5. The powder silo and the spray pipe are connected by a pneumatic pipeline to achieve a split combination, which separates the raw materials from the heating area and eliminates the danger of fire transmission to the silo end;

[0015] 6. This device solves the problem of uncontrolled powder after ignition. This device controls the amount of powder at the ejection port through a quantitative feeding hopper. Combined with direct instantaneous heating and immediate ejection, it can achieve rhythmic interval ejection according to the set fireworks ejection process, thereby improving the dynamic performance, stability and response speed of the device. When the ejection is not needed, the hopper and plasma generator, hopper and / or pneumatic duct wind source are directly closed, and there is no need to maintain a certain temperature all the time, which reduces the aging of components and greatly saves energy.

[0016] Therefore, the device of the present invention can display fireworks effects with various flame colors. It also effectively reduces energy loss, has fast heating speed, good temperature uniformity, and low energy consumption; the device has the advantages of simple structure, safety and reliability. Since the device does not need to preheat the powder, the device is simpler, such as no electromagnetic valve is required on the pneumatic pipeline.

[0017] The plasma generator is selected from arc plasma generator, industrial frequency arc plasma generator, high frequency induction plasma generator, low pressure plasma generator, combustion plasma generator and Tesla coil plasma generator.

[0018] In the above technical solution, the free arc zone refers to the arc zone where the gas is not completely ionized, the energy is not highly concentrated, and the arc is not compressed by the outside world, that is, the arc column cross section increases with the increase of power, and the current density in the arc column is nearly constant, which means that the current is evenly distributed. The temperature is maintained between 2000℃ and 8000℃, and this high temperature area ensures the stability of the arc.

[0019] The compressed arc zone refers to the arc formed by gas discharge between the cathode and the anode being compressed by the external airflow, the wall of the device or the external magnetic field, which makes the arc column thinner and the arc temperature higher. The arc with highly concentrated energy constitutes the compressed arc zone.

[0020] Preferably, the diameter of the ejection port is set between 5 and 80 mm, which is conducive to comprehensively setting parameters such as air flow rate, temperature, particle size, etc. to achieve a better firing and ejection effect.

[0021] Preferably, the distance between the plasma arc zone and the cavity wall of the eruption guide cavity is set between 5 and 50 mm, so as to take into account both cavity wall protection and eruption effect.

[0022] Preferably, the powder is metal powder, and the plasma generator adopts a non-high-frequency arc-starting method. When the pneumatic pipeline conveys the metal powder into the ejection tube, the delivered metal powder is close to the electrode of the plasma generator. The metal powder is not only a burning material, but also used to start the arc. When the delivered metal powder is close to the electrode, the arc is instantly ignited. There is no need to set up a special arc-starting device, the arc-starting is reliable, and the equipment structure is simplified.

[0023] The particle size of the powder is controlled according to the air flow rate and the plasma temperature. For better spraying effect, preferably, the particle size of the powder is between 1 and 300 meshes. Furthermore, when an arc plasma generator is used, the particle size of the powder is between 1 and 50 meshes. When a high-frequency induction plasma generator is used, the particle size of the powder is between 10 and 300 meshes.

[0024] Preferably, the powder silo adopts a metal powder mixed silo, which supports the mixing of metal powders with different melting points. Mixed metal powders with different proportions and / or different particle sizes can be customized according to the effect for mixed ignition and eruption, achieving colorful eruption effects.

[0025] Preferably, the plasma generator adopts a high-frequency induction plasma generator, which adopts an electrodeless induction coupling coil. The induction coupling coil surrounding the eruption guide cavity inputs the energy of the high-frequency power supply into the continuous airflow in the eruption guide cavity for high-frequency discharge, and the powder is directly ignited and ejected in the eruption guide cavity. The generator can produce extremely pure plasma without electrode loss problems, and generally has a long service life of about 2000 to 3000 hours.

[0026] Preferably, the spraying device is mounted on a rotating bracket and driven to rotate by a driving member to shape the fireworks that spray out powder.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time.

[0028] 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

[0029] Figure 1Schematic diagram of the principle structure of Example 1; the attached drawings are marked with explanations: 1. Powder silo; 2. Feeding port; 3. Feeding motor; 4. Mixed powder silo; 5. Rotating motor; 6. Spiral feeding mechanism; 7. Powder conveying pipe; 8. First fan; 9. Safety control module; 10. Control module; 11. Ejection port; 12. Housing; 13. Plasma arc zone; 14. Ejection guide chamber; 15. Electrode; 16. Rotating bracket; 17. Electrode connecting line; 18. Second fan.

[0030] Figure 2 This is a schematic diagram of the local structure of the free arc zone of Example 2 (including the corresponding local schematic diagram of Example 1 for comparison and explanation). Notes on the accompanying drawings: 22. plasma arc zone; 21. eruption guide cavity;

[0031] Figure 3 Schematic diagram of the principle structure of Example 3; the attached drawings are marked with explanations: 51. Powder silo; 52. Feeding port; 53. Feeding motor; 54. Mixing powder silo; 55. Rotating motor; 56. Spiral feeding mechanism; 57. Powder conveying pipe; 58. Air compressor; 59. Safety control module; 60. Control module; 61. Ejection port; 62. Housing; 63. Plasma arc zone; 64. Ejection guide chamber; 65. Electrode; 66. Rotating bracket; 67. Electrode connecting line; 68. Plasma generator.

[0032] Figure 4 Schematic diagram of the principle structure of Example 4; the attached drawings are marked with the following explanations: 401. powder silo; 402. feeding port; 403. feeding motor; 404. mixing powder silo; 405. rotating motor; 406. spiral feeding mechanism; 407. powder conveying pipe; 408. air compressor; 409. safety control module; 410. control module; 411. eruption port; 412. housing; 413. plasma arc zone; 414. eruption guide chamber; 415. coil; 416. rotating bracket; 417. electrode connecting line; 418. plasma generator.

[0033] Figure 5 Schematic diagram of the principle structure of Example 5; the attached drawings are marked with explanations: 101. powder ejection port; 102. housing; 103. plasma arc zone; 104. eruption guide chamber; 105. powder input port; 106. rotating bracket; 107. electrode; 108. fan; 109. rotating motor; 110. plasma generator; 111. electrode connecting line; 112. safety control module; 113. control module; 201. large powder silo; 202. feeding port; 203. feeding motor; 204. spiral feeding mechanism; 205. housing; 206. powder conveying pipe; 207. powder output port; 208. fan power supply; 209. safety control module; 210. control module. DETAILED DESCRIPTION

[0034] Example 1: See attached Figure 1 , reflecting a specific structure of the present invention. The multi-flame color powder combustion eruption device includes two single-material powder silos 1 and one mixed powder silo 4, and the powder silo is provided with a spiral unloading mechanism 6 driven by a feeding motor 3 to realize quantitative unloading. It also includes a pneumatic pipeline, an eruption tube and a plasma generator: the powder conveying pipe 7 and the first fan 8 form a pneumatic pipeline; an eruption guide cavity 14 is provided in the eruption tube, and an electrode 15 of a plasma generator is provided at the bottom of the eruption guide cavity 14, and the electrode 15 is externally connected to the plasma generator through an electrode connecting line 17 (not shown in the figure); each powder silo is connected to the eruption guide cavity 14 of the eruption tube through the powder conveying pipe 7, which reliably separates the raw material from the heating area, and the one-way irreversible air delivery method completely eliminates the danger of fire transmission to the silo end.

[0035] After the plasma generator is powered on, a plasma arc zone 13 is formed by gas discharge in the eruption guide cavity 14 through the electrode 15. In the example, the plasma arc zone 13 is a compressed arc zone, which is formed by the free arc compression of the airflow sent from the bottom of the eruption guide cavity 14 by the second fan 18, and the diffusion angle is 4 to 6 degrees, especially 5 degrees. The straightness of the compressed arc zone is very good. The eruption guide cavity 14 is a shape corresponding to the cylindrical arc zone. The plasma arc zone 13 and the cavity wall of the eruption guide cavity 14 have a spacing that prevents the two from contacting. The spacing is set between 5 and 50 mm to take into account the protection of the cavity wall and the eruption effect. The cavity wall of the eruption guide cavity 14 can be made of refractory materials such as carbon bricks or ceramics, especially around the electrode 15. The plasma vortex is concentrated, and the energy is directly concentrated in the arc zone, avoiding high temperature damage to the eruption tube, so that the ignition and eruption of metal powder with a high melting point can be achieved.

[0036] The powder in each powder silo is quantitatively fed into the powder conveying pipe 7 of the pneumatic pipeline, and the first fan 8 blows the powder into the eruption guide cavity 14. The airflow in the eruption guide cavity 14 drives the powder to pass through the plasma arc area 13 and is instantly ignited, and is immediately ejected from the eruption port 11 of the eruption guide cavity. Since no heat transfer medium is required during ignition, it can prevent the powder from burning out or entering an incandescent state and failing to achieve the original metal combustion color. In addition, the powder has good fluidity in the above process, and has good applicability to metal powders such as magnesium and aluminum that are easily explosive after heating, or other explosive fireworks ingredients, and effectively prevents explosions caused by powder aggregation and heating.

[0037] In the example, the diameter of the ejection port 11 is set between 5 and 80 mm, which is conducive to comprehensively setting parameters such as air velocity, temperature, and particle size to achieve a better ejection effect.

[0038] The operating temperature range of the plasma arc zone 13 is 1000-10000°C. By adjusting the current input of the plasma generator, the operating temperature of the plasma arc zone 13 can be controlled according to the material and particle size of the powder. The powder is heated to 500-5000°C by the arc zone and is instantly ignited and ejected. It can ignite all fireworks metal powders (such as titanium, copper, potassium, aluminum, lithium, etc.) and fireworks raw material powders such as barium salts, strontium salts, sodium salts and copper salts on the market. It 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 traditional fireworks ingredients, making the firing safer. The powder in traditional fireworks can support the eruption and ignition of large-particle pellets.

[0039] In the example, since the plasma arc is formed by compression of a free arc, the flame flow speed is large and can reach more than 300m / s, so it has good directivity and powerful spray, and is suitable for large outdoor activities. Due to the high temperature, large-particle powder can be ignited instantly. Large-particle powder has the characteristics of long burning time and brighter brightness, and the eruption height can reach 6 meters to 30 meters or more.

[0040] The particle size of the powder is controlled according to the air flow rate and the plasma temperature. For better spraying effect, in the example, the particle size of the powder is between 1 and 300 meshes. In the example, according to the type of plasma generator selected, the applicable powder particle size can also be adjusted. When an arc plasma generator is used, the particle size of the powder is between 1 and 50 meshes. When a high-frequency induction plasma generator is used, the particle size of the powder is between 10 and 300 meshes.

[0041] Due to the different melting points of metal powders, for example, if aluminum and iron are mixed and ignited for eruption, the aluminum will often burn out before the iron is ignited. Therefore, the powder silo of the existing device does not support the mixing of metal powders with different melting points. In the example, the mixed powder silo 4 is a metal powder mixed silo that supports the mixing of metal powders with different melting points. Mixed metal powders of different proportions and / or different particle sizes can be customized according to the effect for mixed ignition and eruption, achieving a colorful eruption effect.

[0042] In the example, the spray gun is mounted on a rotating bracket 16, and is driven by a rotating motor 5 to rotate and swing slightly to shape the fireworks of the sprayed powder. The air duct between the spray gun and the second fan 18, the powder delivery pipe 7, the electrode connection line 17, etc. can be a spiral tube and / or a hose to avoid motion interference during swinging.

[0043] The example effectively solves the problem of uncontrolled powder after ignition. The device controls the amount of powder in the ejection port 11 through a powder silo with quantitative feeding, and combines the direct instantaneous heating and immediate ejection of plasma to achieve rhythmic interval ejection according to the set fireworks ejection process, thereby improving the dynamic performance, stability and response speed of the device. When the ejection is not needed, the plasma generator, silo and / or pneumatic duct wind source can be directly turned off, and there is no need to maintain a certain temperature all the time, which reduces the aging of components and greatly saves energy.

[0044] Therefore, the device of the present invention can display fireworks effects with various flame colors. It also effectively reduces energy loss, has fast heating speed, good temperature uniformity, and low energy consumption; the device has the advantages of simple structure, safety and reliability. Since the device does not need to preheat the powder, the device is simpler, such as no electromagnetic valve is required on the pneumatic pipeline.

[0045] The control module 10 in the example includes a display screen and an operation panel of the electrical control system. The control module 10 adjusts the current and voltage of the plasma generator according to the requirements (such as the material, particle size and other characteristics of the powder used, the set stage eruption and firing rhythm, etc.) to control the temperature of the plasma generation, control the speed of the fan, control the speed of the powder quantitative feeding mechanism, control the rotating motor 5, etc. In the example, the control module 10 also includes a safety control module 9, such as automatically disconnecting the power supply when the eruption device is overturned or the temperature of the device or circuit is too high; for example, when the device is erupting, it detects that someone is approaching (the person is less than 1 meter away from the device) to automatically disconnect the power supply to protect the safety of personnel or equipment.

[0046] Example 2: See attached Figure 2 , reflecting another specific structure of the present invention. The difference from Example 1 is that the plasma arc zone 22 in the example is a free arc arc zone, which is conical in shape, and its diffusion angle is 44 to 46 degrees, especially 45 degrees. The free arc is used as the heat source for ignition, which has a larger flame area, increases the contact amount of the powder, and achieves the advantage of full combustion. Due to its low temperature, it is suitable for powders with a smaller ignition point. At the same time, the low temperature also has a good protective effect on the plasma mechanism. Since the free arc does not need to be compressed, the second fan 18 of Example 1 can be omitted, and the size of the ejection guide cavity 21 is set corresponding to the plasma arc zone 22.

[0047] In the example, the height of the plasma arc zone 22 formed by the free arc zone is 25 mm. If the plasma arc zone is replaced by a compressed arc zone of corresponding specifications, its height is 60 mm. Others are the same as in Example 1 and will not be described in detail.

[0048] Example 3: See attached Figure 3, reflecting another specific structure of the present invention. The difference from Example 1 is that 1. The example is a small device with a built-in plasma generator 68. 2. The pneumatic pipeline uses an air compressor 58, and of course a fan can also be used, and the two can be replaced with each other. 3. The powder conveying pipe 57 in the example is connected from the bottom of the eruption guide cavity 64, which can not only convey powder, but also serve as compressed air blowing in the plasma arc zone 63. The rest is the same as Example 1 and will not be repeated.

[0049] Example 4: See attached Figure 4 , reflecting another specific structure of the present invention. The difference from Example 1 is that, in the example, the plasma generator 418 adopts a high-frequency induction plasma generator, and the high-frequency induction plasma generator adopts an electrodeless inductively coupled coil 415. The coil 415 surrounding the eruption guide cavity 414 inputs the energy of the high-frequency power supply of the plasma generator 418 into the continuous airflow in the eruption guide cavity 414 for high-frequency discharge, and the powder is directly ignited and ejected in the eruption guide cavity 414. The generator can produce extremely pure plasma, without the problem of electrode loss, and generally has a long service life of about 2000 to 3000 hours.

[0050] Example 5: See attached Figure 5 , reflecting another specific structure of the present invention. It is suitable for heating, igniting and erupting metal powder and traditional fireworks ingredients. The difference from Example 1 is that in the example, the device is divided into two separate parts: a large powder silo 201 part, a plasma generator 110 and an eruption guide chamber 104 part. The powder output port 207 of the powder delivery pipe 206 is connected to the powder input port 105 through a pipeline, so that the two separate parts are combined through the powder delivery pipe 206. It is better to separate the inflammable and explosive traditional fireworks ingredients from the heating area, connect them through the air duct, and eliminate the danger of spontaneous combustion.

[0051] 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 multi-flame powder combustion spraying device, characterized in that: It includes a powder silo for quantitative feeding, a pneumatic pipeline, a spraying pipe and a plasma generator, wherein the powder silo is connected with the spraying pipe through the pneumatic pipeline; The ejection tube is provided with an ejection guide cavity, and the plasma arc zone is formed by the plasma generator discharging to the gas in the ejection guide cavity, and the plasma arc zone and the cavity wall of the ejection guide cavity have a distance so that the two do not contact each other; the plasma arc zone is a free arc zone or a compressed arc zone; the powder in the powder silo is quantitatively fed into the pneumatic pipeline, and the pneumatic pipeline transports the powder into the ejection guide cavity, and the airflow drives the powder through the plasma arc zone and then ejects it from the ejection port of the ejection guide cavity; the plasma generator controls the working temperature of the plasma arc zone according to the material and particle size of the powder.

2. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The operating temperature range of the plasma arc zone is 1000-10000° C. After passing through the arc zone, the powder is heated to 500-5000° C., ignited and ejected.

3. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The diameter of the ejection port is set between 5 and 80 mm.

4. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The distance between the plasma arc zone and the cavity wall of the eruption guide cavity is set between 5 and 50 mm.

5. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The powder is metal powder, the plasma generator adopts a non-high-frequency arc ignition method, and when the pneumatic pipeline transports the metal powder into the spray pipe, the delivered metal powder is close to the electrode of the plasma generator.

6. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The particle size of the powder is between 1 and 300 meshes.

7. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: When an arc plasma generator is used, the particle size of the powder is between 1 and 50 meshes; when a high-frequency induction plasma generator is used, the particle size of the powder is between 10 and 300 meshes.

8. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The powder silo adopts a metal powder mixed silo, which supports the mixed loading of metal powders with different melting points.

9. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The plasma generator adopts a high-frequency induction plasma generator, and the high-frequency induction plasma generator adopts an electrodeless induction coupling coil. The induction coupling coil surrounding the eruption guide cavity inputs the energy of the high-frequency power supply into the continuous airflow in the eruption guide cavity to perform high-frequency discharge, and the powder is directly ignited and ejected in the eruption guide cavity.

10. A multi-flame powder combustion spraying device as claimed in claim 1, characterized in that: The spraying device is installed on the rotating bracket and is driven to rotate by the driving member.

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