Contact ignition combustible powder cold light firework effect generating device

Abstract

The invention discloses a contact ignition combustible powder cold light firework effect generating device which comprises a powder channel provided with an eruption opening, and heating pieces are distributed in the powder channel and are resistance heating pieces; the powder storage device is used for feeding combustible powder into the powder channel; the wind power assembly is used for inputting airflow into the powder channel; the combustible powder carried by the airflow is in contact with the heating piece when passing through the powder channel, is ignited and is sprayed out from the spraying opening. The combustible powder is directly contacted with the heating body to be ignited, so that the heat transfer link is saved, the energy consumption is effectively reduced, and a necessary ignition component in the prior art is omitted; and preheating or a plasma generator, a pressure fuel assembly and the like are not needed, so that the device is relatively simple in structure, and product miniaturization is facilitated.

Description

Technical Field

[0001] The invention relates to a generating device for generating cold light fireworks effect by using combustible powder. Background Art

[0002] Traditional cold light fireworks (cold fireworks) use the burning of gunpowder to excite combustible powders such as metals or metal oxides mixed in it to produce a star effect.

[0003] In the prior art, in order to replace the traditional fireworks ejection formed by gunpowder emission, the industry has developed many devices that simulate the cold light fireworks effect, and the combustible powder is ignited and ejected to form the cold light fireworks ejection effect. Due to its high safety, it has been widely used. In order to realize the ignition and excitation of combustible powder, the prior art can be summarized into the following methods:

[0004] 1. Powder preheating + ignition mode: A cold flame eruption device disclosed in Chinese patent documents such as publication number: CN105241316A, CN105258576A, CN105371707A, CN105854317A, CN107121022A, etc. In this series of patent documents, heating the outer wall of the feed tube is the key factor for powder excitation and ignition to achieve cold flame eruption. Other similar patent documents, such as "a device for emitting and controlling colored cold fireworks - Publication No.: CN106767189A" adopts "heating coil heating"; "a heating element device and stage cold fireworks equipment - 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 No.: CN109000519A" adopts "the outer surface of the feeding 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 methods.

[0005] Second, the arc excitation ignition based on the plasma generator, such as the "multi-flame powder combustion and spraying device" disclosed in the publication number: CN119687731A.

[0006] 3. Combustion and ignition of a pressurized fuel jet based on the Bernoulli principle. For example, CN 221945035U (authorization announcement number) discloses a handheld fireworks device based on powder combustion and eruption; CN 222068500U (authorization announcement number) discloses a fireworks device based on powder combustion and eruption.

[0007] The disadvantages of the prior art are that in order to ignite and stimulate the star effect of cold light fireworks produced by metal or metal oxide powders, a relatively high heating temperature needs to be provided, which leads to a series of problems: such as high energy consumption of the device, especially high ineffective energy consumption; or there are many necessary components such as igniters, plasma generators, pressure fuel assemblies, etc., the structure is relatively complex and it is difficult to miniaturize; or high energy and flammability result in lack of safety guarantee, etc. Summary of the Invention

[0008] In order to solve the above disadvantages, the technical problem to be solved by the present invention is to provide a device that uses combustible powder to produce a cold light fireworks effect, which can effectively reduce the energy consumption for igniting and stimulating the combustible powder and has a simple structure.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is a contact-ignition cold light fireworks effect generating device for combustible powder, including:

[0010] A powder channel provided with an ejection port, and heating elements are distributed in the powder channel, and the heating elements are electric heating elements;

[0011] A powder storage device for feeding combustible powder into the powder channel;

[0012] A wind force assembly for inputting air flow into the powder channel;

[0013] The combustible powder carried by the air flow is ignited when contacting the heating element while passing through the powder channel and is ejected from the ejection port.

[0014] The beneficial effect of the present invention is that in the prior art, although arc excitation ignition and pressure fuel jet combustion ignition directly ignite the powder with flame, the structure is complex; for the combustible powder in the powder preheating + ignition mode, it does not directly contact the heating body, there is a relatively high energy consumption in the heat transfer link, and an igniter is also required. In the technical solution of the present invention, the combustible powder is directly ignited by contacting the heating body, which not only saves the heat transfer link and effectively reduces the energy consumption, but also omits the necessary ignition components in the prior art; there is no need for preheating or plasma generators, pressure fuel assemblies, etc., making the device structure relatively simple and also conducive to the miniaturization of the product.

[0015] Preferably, the heating body is a resistance heating element.

[0016] Preferably, the heating body is a resistive element heated by electricity, and the resistive element is distributed in a grid shape on the cross section of the powder channel.

[0017] Preferably, the heating body is composed of a plurality of arc-shaped guide vanes arranged in the powder channel, and the guide vanes are resistive sheets heated by electricity.

[0018] Preferably, the heating body is a channel with a bent portion, and the channel is a resistive body heated by electricity.

[0019] Preferably, the heating element is composed of a number of fence bodies with bent portions, and the fence body is a resistive body for electric heating.

[0020] Preferably, the heating element is composed of a number of linear bodies distributed axially before and after along the powder channel, and each linear body is staggeredly distributed in the circumferential direction of the cross-section of the powder channel.

[0021] Preferably, a number of stages of heating elements are arranged before and after along the powder channel.

[0022] Preferably, the powder storage device uses a gravity feeding mechanism or a screw feeding mechanism to feed combustible powder into the powder channel.

[0023] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the advantages of the above-mentioned preferred solutions.

[0024] In the description of this specification, the description with reference to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0026] 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0029] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0031] Figure 2 It is a top view structural schematic diagram of the heating element of Example 1.

[0032] Figure 3 It is a top view structural schematic diagram of the heating element with other grid-like structures.

[0033] Figure 4 It is a schematic diagram of the overall structure of Example 2.

[0034] Figure 5 It is a schematic diagram of the overall structure of Example 3.

[0035] Figure 6 It is a schematic diagram of the overall structure of Example 4.

[0036] Figure 7Schematic three-dimensional structure diagram of the heating element in Example 4.

[0037] Figures 8 - 10 Schematic structure diagram of the gun-shaped housing in Example 5.

[0038] Figure 11 Schematic overall structure diagram of Example 6.

[0039] Figures 12 - 15 Schematic structure diagrams of different numbers of diversion resistance sheets.

[0040] Figures 16 - 18 Schematic structure diagram of Example 7.

[0041] Figure 19 Schematic structure diagram of the heating element with a spiral-section pipe.

[0042] Figure 20 Schematic structure diagram of the heating element with a bent-section pipe. Detailed implementation mode

[0043] Example 1: Refer to the appendix Figures 1 - 3 , which reflects a specific structure of the present invention. The contact-ignited combustible powder cold light fireworks effect generating device includes a powder channel 6 provided with an ejection port 9, and a heating element 8 is distributed in the powder channel 6. The heating element 8 is a resistance heating element. In the example, the heating element 8 is powered by a power supply assembly 4. The power supply assembly 4 can be a battery or an external power supply. A heat insulation layer 7 is correspondingly provided in the area where the heating element 8 is installed. It has the dual functions of heat preservation and heat insulation, is convenient to install on a fixed structure, and at the same time helps to maintain the temperature of the heating element 8 constant. In the example, the heating element 8 is a resistance wire 801 heated by electricity, and the resistance wire 801 is distributed in a grid pattern on the cross-section of the powder channel 6. There are gaps 802 for the combustible powder to pass through between the resistance wires 801. In other implementation modes, the resistance wire 801 can also adopt other grid-like distribution methods, such as Figure 3 shown.

[0044] The device further includes a powder storage device 2 for feeding combustible powder into the powder channel 6. In the example, the powder storage device 2 uses a gravity feeding mechanism to feed combustible powder into the powder channel 6. As Figure 1 shown, the powder storage device 2 located at a high position is connected to the powder channel 6 through a feeding pipe, and the powder falls into the powder channel 6 by its own weight. The powder storage device 2 is provided with a feeding switch 3.

[0045] The device further includes a wind force assembly 5 for inputting an air flow into the powder channel 6. The wind force assembly 5 is provided with an air volume regulating mechanism to regulate the magnitude or rate of the input air flow. The air flow provided by the wind force assembly 5 carries the combustible powder input by the powder storage device 2 and contacts the heating element 8 when passing through the powder channel 6, and is ignited and ejected from the ejection port 9. A cold light fireworks effect composed of a large number of star effects of the combustion of the combustible powder is presented. The wind force assembly 5 can be powered by the power supply assembly 4.

[0046] It seems difficult to reliably achieve stable and reliable ignition and continuous combustion only by the contact and collision of the combustible powder with the heating body.

[0047] However, we found in the experiment that when the combustible powder carried by the air flow contacts and collides with the heating element 8, heat will be transferred from the heating element 8 to the powder particles, causing their temperature to rise rapidly, reaching or even exceeding their ignition point; the air flow provided by the wind force assembly 5 plays an important role in the ignition process. The air flow can provide oxygen, and at the same time, the kinetic energy of the air flow acts on the powder particles, increasing the collision frequency between the particles, which helps the transfer of heat and the progress of the reaction. The collision between the powder particles and the heating element will also greatly increase the friction coefficient and normal pressure, resulting in the generation of local high-temperature frictional heat, which also helps the ignition of the powder, meaning that the heating element only needs to provide a relatively low heating temperature, and can reliably ignite the combustible particles with the cooperation of the local high-temperature frictional heat, which is beneficial to reducing energy consumption. Once a part of the powder is ignited, the combustion reaction will continue within a certain range, because the heat generated during the particle combustion process will further heat the surrounding powder particles, making them also reach the ignition point and participate in the combustion. This chain reaction enables the combustible powder to continue to burn under the action of the heating element and the air flow. Setting an appropriate distribution density of the grid-shaped resistance wire 801 enables multiple parts of the powder to be ignited, which can ensure that the entire combustible powder stream carried by the air flow is fully ignited. Avoid powder waste and ensure the number and density (ignition degree) of the ejected combustion stars. The heating element 8 distributed in the powder channel 6 seems to hinder the flow of the combustible powder, but experiments have proved that under the stable and continuous air flow supply of the wind force assembly 5, the vast majority of the combustible powder carried by the air flow can overcome the obstruction of the heating element 8 and smoothly queue up and pass through the gap 802, so as to form a stable ejection (ejection degree) through the powder channel 6.

[0048] As can be seen from the above, the device can directly heat and ignite the combustible powder without additional ignition components. There is no need for preheating or plasma generators, pressure fuel components, etc., which makes the device structure relatively simple, so that the entire device can be miniaturized.

[0049] In order to balance the requirements in terms of ignition degree and ejection degree, so as to achieve a better cold light fireworks effect. The adjustment method of the device includes two aspects: First, adjust the distribution density setting of the orthographic projection of the heating body on the cross-section of the powder channel; Second, adjust the air volume of the wind power assembly. Judging from the current experimental results, it is better that the distribution density of the orthographic projection of the heating body on the cross-section of the powder channel is between 50% and 100%, such as 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. When the distribution density is relatively high, the passability of the powder can be maintained by arranging multiple heating bodies 8 along the front and back of the powder channel 6.

[0050] Regarding the combustible powder, the ignition points of metal particles are listed as follows: The combustion temperature of titanium powder with a mesh size of 1 to 100 is approximately 400 to 700 °C, and the combustion temperature of titanium powder with a mesh size of 120 to 400 is approximately 250 to 500 °C; The combustion temperature of iron powder with a mesh size of 40 to 100 is approximately 600 to 1000 °C, the combustion temperature of iron powder with a mesh size of 120 to 400 is approximately 400 to 700 °C, the combustion temperature of iron powder with a mesh size of 500 to 1000 is approximately 280 to 500 °C, and the nano iron powder is around 250 °C to 280 °C. The ignition point is directly proportional to the particle size. The heating element 8 in the form of resistance heating can provide a heating temperature reaching 1000 °C within 2 to 5 seconds. The particle size of the combustible powder can be selected as needed. Make the particle size match the heating temperature and the wind power to ensure that the combustible powder is successfully excited at an appropriate time (such as near the ejection port 9).

[0051] Example 2: Refer to the appendix Figure 4 , which reflects a specific structure of the present invention. The difference from Example 1 is that the powder storage device 2 feeds the combustible powder into the powder channel 6 through a screw conveyor mechanism 10. The screw conveyor mechanism 10 is connected to the discharge port of the powder storage device 2. The motor 11 powered by the power supply assembly 4 is connected to the screw of the screw conveyor mechanism 10. Turning on the motor 11 can transport the combustible powder in the powder storage device 2 into the powder channel 6.

[0052] Example 3: Refer to the appendix Figure 5 , which reflects a specific structure of the present invention. The difference from Example 1 is that three-level heating bodies 8 are arranged along the front and back of the powder channel 6.

[0053] Example 4: Refer to the appendix Figures 6 - 7 , which reflects a specific structure of the present invention. The difference from Example 1 is that the heating body 8 is composed of several fence bodies with bending parts, and its three-dimensional structure is as Figure 7As shown, the fence body is a resistive body heated by electricity, and the combustible powder passes through the gaps of the fence body. To ensure sufficient contact between the fence body and the combustible powder, in the example, the fence body is arranged in a curved multi-layer structure, and the combustible powder is transported by air flow and can easily pass through, or queue up and pass through in sequence according to the multi-layer arrangement.

[0054] In other embodiments, it can also be a spiral structure or other structural forms that increase the contact probability. For example Figure 19 , 20 As shown, the heating body is a pipe with a curved part, a twisted part or a spiral part, and the pipe is a resistive body heated by electricity.

[0055] Embodiment 5: Refer to the appendix Figures 8 - 10 , which reflects another specific structure of the present invention. It also includes a housing 1, a powder storage device 2, a power supply component 4, a wind power component 5, a powder channel 6, a heat insulation layer 7, an ejection port 9, a screw conveyor 10 and its motor 11. The heating body 8 composed of three fence bodies is distributed along the front and back of the powder channel 6. In the example, the housing 1 is a gun-shaped shell, and the trigger 12 of the gun is used as the power supply switch for the heating body 8, the wind power component 5 and the motor 11. Figure 9 In Figure 10 there are four heating bodies 8, and the heating bodies 8 adopt resistance wires heated by electricity.

[0056] Embodiment 6: Refer to the appendix Figures 11 - 15 , which reflects a specific structure of the present invention. The difference from Embodiment 1 is that in the example, the heating body 8 is composed of three arc-shaped guide vanes arranged in the powder channel 6, and the guide vanes are resistive sheets heated by electricity. In other embodiments, the number of guide vanes can also be one (such as Figure 12 ), two (such as Figure 13 ), four (such as Figure 14 ), multiple (such as Figure 15 ).

[0057] Embodiment 7: Refer to the appendix Figures 16 - 18 , which reflects another specific structure of the present invention. The difference from the above embodiments is that in the example, the heating body 8 is composed of a number of linear bodies 803 distributed axially along the front and back of the powder channel 6. The linear bodies are resistive bodies heated by electricity. Each linear body 803 is staggeredly distributed in the circumferential direction of the cross-section of the powder channel 6, and there are gaps 802 for the combustible powder to pass through between the linear bodies 803. Figure 17 It reflects different settings of the stagger angle of each linear body 803 in the circumferential direction of the cross-section of the powder channel 6, and its density can be set according to actual situations such as the particle size of the combustible powder, the heating temperature, and the wind power. The same is true for heating bodies with other structures. Figure 17 It reflects different settings of the width of each linear body 803.

[0058] 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 embodiments described. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and combines the accompanying drawings to specifically describe these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize 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 only limited by the claims and their full scope and equivalents, and is not limited by the specific embodiments disclosed.

Claims

1. A contact-ignited combustible powder cold light fireworks effect generating device, characterized in that: The device includes: A powder channel is provided with a spraying port, and a heating element is distributed in the powder channel, and the heating element is an electric heating element; a powder storage device for feeding combustible powder into the powder passage; A wind power component for inputting airflow into the powder channel; The combustible powder carried by the air flow passes through the powder channel and contacts the heating element to be ignited and ejected from the ejection port.

2. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is a resistance heating element.

3. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is a resistor that is heated by electricity, and the resistor is distributed in a grid shape on the cross section of the powder channel.

4. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is composed of a plurality of arc-shaped guide plates arranged in the powder channel, and the guide plates are resistance plates that are electrically heated.

5. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is a channel with a curved portion, and the channel is a resistor body that is heated by electricity.

6. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is composed of a plurality of fence bodies with curved parts, and the fence body is a resistor body that is heated by electricity.

7. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in claim 1, characterized in that: The heating body is composed of a plurality of linear bodies distributed front and back along the axial direction of the powder channel, and each linear body is staggeredly distributed in the circumferential direction of the cross section of the powder channel.

8. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in any one of claims 1 to 7, characterized in that: Several levels of heating bodies are arranged along the front and back of the powder channel.

9. A contact-ignited combustible powder cold light fireworks effect generating device as claimed in any one of claims 1 to 7, characterized in that: The powder storage device uses a gravity feeding mechanism or a spiral feeding mechanism to feed the combustible powder into the powder channel.

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