Contact ignition combustible powder cold light firework effect generating device

Abstract

The utility model discloses a contact ignition combustible powder cold light firework effect generating device which comprises a powder channel provided with an eruption opening, heating pieces are distributed in the powder channel, and the heating pieces 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 utility model relates to a kind of cold light fireworks effect generating device using combustible powder. BACKGROUND

[0002] Traditional cold light fireworks (cold flame) are ignited by gunpowder to excite combustible powder such as metal or metal oxide mixed therein, so as to produce star effect.

[0003] In the prior art, to replace the traditional gunpowder launch composition of fireworks, eliminate safety hazards without gunpowder, many devices simulating cold light fireworks effect have been developed in the industry. Combustible powder ignition and jet composition cold light fireworks emission effect, due to its high safety, has been widely used. In order to realize the ignition of combustible powder, the prior art can be summarized as follows:

[0004] I. Powder preheating + ignition mode: such as CN105241316A, CN105258576A, CN105371707A, CN105854317A, CN107121022A, etc. Chinese patent documents disclose a cold flame jetting device. In this series of patent documents, heating outside the feeding pipe wall is the key factor for powder excitation and ignition to realize cold flame jetting. Other similar patent documents, such as "a color cold fireworks spraying and control device - CN106767189A", use "heating coil heating"; "a heating device and stage cold flame equipment - CN216482556U", uses "a heating module is sleeved on the outer wall of the pipe body conveying metal powder"; "an environmentally friendly fireworks machine without gunpowder - CN109000519A", "the outer surface of the feeding pipe is further provided with a heating ring and a heat preservation sleeve ring from inside to outside". Similar powder excitation and ignition means are used.

[0005] II. Electric arc excitation ignition based on plasma generator: such as CN119687731A "a multi-flame color powder combustion jetting device".

[0006] III. Pressure fuel jet combustion ignition based on Bernoulli principle: such as CN221945035U (authorized publication number) discloses a handheld fireworks setting-off device based on powder combustion jetting; CN222068500U (authorized publication number) discloses a fireworks device based on powder combustion jetting.

[0007] The prior art has the disadvantage that in order to ignite the star effect of the cold light fireworks produced by the metal or metal oxide powder, a high heating temperature needs to be provided, and thus a series of problems are caused, such as high energy consumption of the device, especially high invalid energy consumption, or a large number of necessary components such as igniters, plasma generators, pressure fuel assemblies, and the like, and a relatively complex structure and difficulty in miniaturization, or high energy and flammability, and lack of safety protection. SUMMARY

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

[0009] In order to solve the above-mentioned technical problem, the technical scheme adopted by the present application is a combustible powder cold light fireworks effect generating device ignited by contact, comprising:

[0010] A powder channel provided with a spouting opening, and a heating element is distributed in the powder channel, wherein the heating element is an electric heating element;

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

[0012] A wind power assembly for inputting airflow into the powder channel;

[0013] The combustible powder carried by the airflow is ignited by contacting the heating element when passing through the powder channel and is spouted out of the spouting opening.

[0014] The present application has the beneficial effect that in the prior art, although the electric arc ignition and the pressure fuel jet combustion ignition are direct powder ignition by flame, the structure is complex; the combustible powder in the powder preheating + ignition mode does not directly contact the heating element, and there is a high energy consumption in the heat transfer link, and an igniter is also needed. In the technical scheme of the present application, the combustible powder is directly ignited by contacting the heating element, not only saving the heat transfer link to effectively reduce the energy consumption, but also omitting the necessary ignition assembly in the prior art; without preheating or plasma generator, pressure fuel assembly, and the like, the device structure is relatively simple, and is also beneficial to product miniaturization.

[0015] Preferably, the heating element is an electric heating element.

[0016] Preferably, the heating element is an electric resistance element for electric heating, and the electric resistance element is distributed in a grid shape on the cross section of the powder channel.

[0017] Preferably, the heating element is composed of a plurality of arc-shaped flow guide vanes arranged in the powder channel, and the flow guide vanes are electric resistance vanes for electric heating.

[0018] Preferably, the heating element is a channel with a curved portion, and the channel is an electric resistance body for electric heating.

[0019] Preferably, the heating member is composed of several fence bodies with curved sections, and the fence bodies are electrically heated resistance bodies.

[0020] Preferably, the heating member is composed of several linear bodies arranged along the powder channel in the axial direction.

[0021] Preferably, several levels of heating members are arranged along the powder channel in the axial direction.

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

[0023] Of course, any product implementing the present application does not necessarily need to achieve all the advantages of the preferred solutions described above.

[0024] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like 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 application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can 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 understood by those skilled in the art to which the present application belongs. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or an ordering between or among the indicated technical features. Thus, a feature defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0029] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0032] Figure 3 It is a schematic diagram of the top structure of the heating element of other grid structures.

[0033] Figure 4The overall structure schematic diagram of Example 1.

[0034] Figure 5 The overall structure schematic diagram of Example 3.

[0035] Figure 6 The overall structure schematic diagram of Example 4.

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

[0037] Figures 8-10 The structure schematic diagram of the gun-shaped shell of Example 5.

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

[0039] Figures 12-15 The structure schematic diagram of different numbers of flow guide resistance sheets.

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

[0041] Figure 19 The structure schematic diagram of the heating element with a spiral pipe.

[0042] Figure 20 The structure schematic diagram of the heating element with a curved pipe. DETAILED DESCRIPTION

[0043] Example 1: refer to the attached Figures 1-3 , reflecting a specific structure of the present application. The contact ignition combustible powder cold light firework effect generating device includes a powder channel 6 provided with a spouting opening 9, and a heating element 8 is distributed in the powder channel 6. The heating element 8 is an electric 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 source. The area where the heating element 8 is installed is provided with a heat preservation and insulation layer 7. The double effect of heat preservation and insulation facilitates installation on a fixed structure and helps maintain the temperature of the heating element 8 constant. In the example, the heating element 8 is an electric resistance wire 801 heated by electricity, and the electric resistance wire 801 is distributed in a grid shape on the cross section of the powder channel 6. The electric resistance wire 801 has a gap 802 for the combustible powder to pass through. In other embodiments, the electric resistance wire 801 can also adopt other grid-shaped distribution methods, such as Figure 3 .

[0044] The device also 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 1As shown, the high-positioned powder storage device 2 is connected to the powder channel 6 through a downpipe, and the powder falls into the powder channel 6 by its own weight. The powder storage device 2 is provided with a downpipe switch 3.

[0045] The device also includes a wind component 5 for inputting air flow into the powder channel 6, and the wind component 5 is provided with a wind volume adjusting mechanism to adjust the size or rate of the input air flow. The air flow provided by the wind component 5 carries the combustible powder input from the powder storage device 2 to contact the heating element 8 when passing through the powder channel 6, and the combustible powder is ignited and sprayed out from the spray port 9. A cold light fireworks effect is formed by a large number of star-shaped effects of the combustion of the combustible powder. The wind component 5 can be powered by the power component 4.

[0046] It seems difficult to reliably and stably ignite and continuously burn the combustible powder only by the contact and collision of the combustible powder with the heating element.

[0047] However, we found in experiments that when the air flow carrying the combustible powder contacts and collides with the heating element 8, heat is transferred from the heating element 8 to the powder particles, rapidly increasing the temperature of the powder particles to even exceed the ignition point. The air flow provided by the wind component 5 plays an important role in the ignition process. The air flow can provide oxygen, and the kinetic energy of the air flow acts on the powder particles, increasing the collision frequency between the particles, which helps the heat transfer and the reaction. The collision between the powder particles and the heating element also greatly increases the friction coefficient and the normal pressure, resulting in the generation of local high-temperature friction heat, which also helps the ignition of the powder, meaning that the heating element only needs to provide a relatively low heating temperature, which can reliably ignite the combustible particles with the help of local high-temperature friction heat, which is conducive to reducing energy consumption. Once the local powder is ignited, the combustion reaction will continue within a certain range, because the heat generated during the combustion of the particles will further heat the surrounding powder particles, causing them to also reach the ignition point and participate in the combustion. This chain reaction enables the combustible powder to continuously burn under the action of the heating element and the air flow. Setting an appropriate distribution density of the grid-shaped resistance wire 801 ensures that multiple local powders are ignited, which can ensure that the entire flow of combustible powder carried by the air flow is fully ignited. This avoids waste of powder and ensures the number and density of the sprayed burning stars. The heating element 8 distributed in the powder channel 6 seems to hinder the flow of the combustible powder, but experiments have shown that under the stable and continuous air flow supply of the wind component 5, most of the combustible powder carried by the air flow can overcome the hindrance of the heating element 8 and smoothly queue through the gap 802, thereby passing through the powder channel 6 and forming a stable spray.

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

[0049] For the combustible powder, the ignition point of the metal particles is exemplified as follows: the combustion temperature of titanium powder of 1-100 mesh is approximately 400-700℃, the combustion temperature of titanium powder of 120-400 mesh is approximately 250-500℃; the combustion temperature of iron powder of 40-100 mesh is approximately 600-1000℃, the combustion temperature of iron powder of 120-400 mesh is approximately 400-700℃, the combustion temperature of iron powder of 500-1000 mesh is approximately 280-500℃, and the combustion temperature of nano iron powder is approximately 250-280℃. The ignition point is in direct proportion to the particle size. The heating element 8 in the resistance heating mode can provide a heating temperature of up to 1000℃ within 2-5 seconds. The particle size of the combustible powder can be selected as needed. The particle size, the heating temperature, and the wind force are matched to ensure that the combustible powder is successfully ignited at the right time (e.g., near the ejection port 9).

[0050] Example 2: refer to the attached Figure 4 , which reflects a specific structure of the utility model. The difference from example 1 is that the powder storage device 2 sends the combustible powder into the powder channel 6 through the spiral conveying mechanism 10. The spiral conveying 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 spiral screw of the spiral conveying mechanism 10. Turning on the motor 11 can transport the combustible powder in the powder storage device 2 into the powder channel 6.

[0051] Example 3: refer to the attached Figure 5 , which reflects a specific structure of the utility model. The difference from example 1 is that three heating elements 8 are arranged before and after the powder channel 6.

[0052] Example 4: refer to the attached Figures 6-7 , which reflects a specific structure of the utility model. The difference from example 1 is that the heating element 8 is composed of several fence bodies with curved parts, and the three-dimensional structure is as shown in Figure 7 . The fence body is a resistance body for electric heating, and the combustible powder passes through the gap of the fence body. In order to make the fence body fully contact with the combustible powder, the fence body is arranged as a curved multi-layer structure in the example, and the combustible powder can easily pass through by air conveying, or pass through in turn according to the multi-layer arrangement.

[0053] Other embodiments can also be spiral structures or other structures that increase the contact probability. As shown in Figure 19 , 20 , the heating element is a pipeline with curved parts, twisted parts, or spiral parts, and the pipeline is a resistance body for electric heating.

[0054] Example 5: refer to the attached Figures 8-10, reflecting another specific structure of the utility model. Same including shell 1, powder storage device 2, power supply assembly 4, wind force assembly 5, powder channel 6, heat preservation insulation layer 7, spout 9, spiral conveying mechanism 10 and its motor 11, three fence bodies constitute heating piece 8 and distribute along powder channel 6 before and after. In the example, shell 1 is gun type shell, adopts the trigger 12 of gun as the power supply switch of heating piece 8, wind force assembly 5, motor 11. Figure 9 The heating piece 8 is four, and the heating piece 8 adopts resistance wire of electric heating. Figure 10 Reflecting other structure examples of gun type shell.

[0055] Embodiment 6: refer to attached Figures 11-15 , reflecting a specific structure of the utility model. The difference from embodiment 1 is that, in the example, the heating piece 8 is composed of three arc-shaped flow guide vanes arranged in the powder channel 6, and the flow guide vane is a resistance vane of electric heating. In other embodiments, the number of flow 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 ).

[0056] Embodiment 7: refer to attached Figures 16-18 , reflecting another specific structure of the utility model. The difference from the above embodiment is that, in the example, the heating piece 8 is composed of a plurality of linear bodies 803 distributed along the axial direction of the powder channel 6. The linear body is a resistance body of electric heating. Each linear body 803 is distributed in the circumferential direction of the cross section of the powder channel 6, and the linear body 803 has a gap 802 for the combustible powder to pass through. Figure 17 Reflecting the different settings of the staggered angle of each linear body 803 in the circumferential direction of the cross section of the powder channel 6, the density thereof can be set according to the actual situation of the particle size of the combustible powder, the heating temperature, the wind force, etc. The same is true for the heating piece of other structures. Figure 17 Reflecting the different settings of the width of each linear body 803.

[0057] The above disclosed embodiments of the utility model are only used for helping to set forth the utility model. The embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and combines the drawings to specifically describe these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. However, the utility model can be implemented in many other ways different from those described herein, and the person skilled in the art can make similar improvements without deviating from the connotation of the utility model, so the utility model is limited by the claims and the entire scope and equivalents thereof, and is not limited by the disclosed specific embodiments.

Claims

1. A contact-ignited combustible powder cold light fireworks effect-generating device, characterized in that, The device comprises: a powder channel provided with a discharge port, and a heating element distributed in the powder channel, the heating element being an electric heating element; a powder storage device for feeding combustible powder into the powder channel; an air force assembly for inputting air flow into the powder channel; the combustible powder entrained by the air flow is ignited when contacting the heating element while passing through the powder channel and is discharged from the discharge port.

2. The device for generating a cold light firework effect from combustible powder by contact ignition as described in claim 1, characterized in that, The heating element is an electric resistance heating element.

3. The device for generating a cold light firework effect from combustible powder by contact ignition as described in claim 1, characterized in that, The heating element is an electric resistance element heated by electricity, and the electric resistance element is distributed in a grid shape on the cross section of the powder channel.

4. The device for generating a contact-ignited combustible powder cold light fireworks effect as described in claim 1, characterized in that, The heating element is composed of a plurality of arc-shaped flow guides arranged in the powder channel, and the flow guides are electric resistance guides heated by electricity.

5. The device for generating a cold light firework effect from combustible powder by contact ignition as described in claim 1, characterized in that, The heating element is a channel with a curved portion, and the channel is an electric resistance body heated by electricity.

6. The device for generating a cold light firework effect from combustible powder by contact ignition as described in claim 1, characterized in that, The heating element is composed of a plurality of fence bodies with curved portions, and the fence bodies are electric resistance bodies heated by electricity.

7. The device for generating a contact-ignited combustible powder cold light fireworks effect as described in claim 1, characterized in that, The heating element is composed of a plurality of linear bodies distributed in front of and behind the axis of the powder channel, and each linear body is distributed in a staggered manner in the circumferential direction of the cross section of the powder channel.

8. A device for generating a contact-ignited combustible powder cold light fireworks effect as described in any one of claims 1-7, characterized in that, A plurality of stages of heating elements are arranged in front of and behind the powder channel.

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

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