Display shell capable of generating purple smoke effect
By designing a spherical projectile cavity in the fireworks shell, installing an explosive charge at the center, and filling it with effect charges, and utilizing the staged release of oxidizer and the brightening effect of metal combustion, the problem of insufficient color rendering of purple smoke was solved, achieving high color rendering and stability at night.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LIUYANG YIHELONG FIREWORKS GRP
- Filing Date
- 2025-12-19
- Publication Date
- 2026-04-14
AI Technical Summary
Existing purple smoke effect fireworks have insufficient color rendering in the night sky and are easily affected by light, humidity and temperature, resulting in unstable color rendering.
The explosive charge is installed in the center of the spherical projectile cavity, and the effect charge is filled around the explosive charge. Through staged release of oxidizer, energy transfer adaptation and smoke carrier regulation, combined with the brightening effect of organic dye and metal combustion, the high color rendering and stability of purple smoke are achieved.
It achieves high color rendering and good stability of purple smoke at night. Through multi-mechanism synergistic color rendering, it breaks through the dependence of traditional flame tests on metal ions and enhances nighttime visual clarity.
Smart Images
Figure CN121855338A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a firework shell, and more particularly to a firework shell that produces a purple smoke effect. Background Technology
[0002] Fireworks that produce a smoke effect, commonly known as colored smoke, were originally daytime fireworks used in celebrations, film special effects, or military exercises to generate colored smoke. Their smoke generation mechanism involves the heat generated by the reaction vaporizing the smoke-producing agent, which then condenses upon contact with air to form aerosol smoke. A key characteristic is that the smoke is clearly visible during the day and has vibrant colors. In recent years, their application has been extended to nighttime displays.
[0003] Fireworks, as a comprehensive art form integrating chemistry, physics, and materials science, focuses on achieving specific visual and auditory effects through precise formula design. Its technical challenges often lie in the presentation of specific colors. Traditional purple smoke requires a flame color reaction involving potassium and lithium salts. However, the flame color of potassium salts is easily interfered with by other metal ions during combustion, and lithium salts decompose easily at high temperatures. Furthermore, the sublimation temperature of the purple dye needs to be precisely matched with the combustion temperature of the chemicals, resulting in a low tolerance for process errors. Additionally, it is easily affected by nighttime light, humidity, and temperature, leading to unstable color rendering. Therefore, existing fireworks that produce purple smoke effects all suffer from insufficient color rendering of the purple smoke in the night sky.
[0004] To address the aforementioned drawbacks, the technical problem this invention aims to solve is to provide a firework shell that produces a purple smoke effect, effectively solving the problem of insufficient color rendering of purple smoke in the night sky. To solve this technical problem, the present invention employs a firework shell that produces a purple smoke effect, comprising a spherical projectile filled with an explosive charge and an effect charge, and a paper cup holder containing the propellant. The paper cup holder is equipped with an ignition fuse for igniting the propellant. The spherical projectile and the paper cup holder are connected by a fuse to transmit the ignition between the propellant and the explosive charge. The firework shell is characterized in that the explosive charge is installed at the center of its inner cavity, and the effect charge is filled around the explosive charge within the inner cavity of the spherical projectile. The effective drug is composed of the following components in the indicated weight ratios: 19-21 parts potassium perchlorate, 1-3 parts barium nitrate, 0.1-2 parts sulfur, 1-3 parts magnesium-aluminum alloy, 14-16 parts phenol-formaldehyde resin, 1-3 parts polyvinyl chloride, 4-6 parts starch, 2-4 parts copper oxide, and 19-21 parts 1,4-diamino-2,3-dihydroanthraquinone. The components are mixed evenly using conventional methods and then granulated to obtain the final product. The explosive is composed of the following components in the indicated weight ratios: 4-6 parts potassium nitrate, 14-16 parts ammonium perchlorate, 4-6 parts charcoal, 31-33 parts phenol-formaldehyde resin, 2-4 parts polyvinyl chloride, 14-16 parts sodium oxalate, 9-11 parts rice husk, and 4-6 parts sodium bicarbonate. The components are mixed evenly using general methods and then granulated to obtain the explosive. The propellant is composed of the following components in the indicated weight ratios: 27-29 parts potassium nitrate, 11-13 parts strontium nitrate, 9-11 parts shellac, 4-6 parts strontium carbonate, and 4-6 parts starch; the components are mixed evenly using conventional methods and then granulated to obtain the final product. When the fireworks are set off, the shells are placed inside the launcher barrel, the ignition fuse is lit, and the propellant in the paper cup holder explodes, launching the spherical shell into the air. The fuse ignited by the propellant ignites the detonating charge after a set delay, which explodes the spherical shell. At the same time, the detonating charge ignites the effect charge, producing smoke. The falling smoke creates a spectacular display.
[0005] Preferably, the active ingredient is composed of the following components in the indicated weight ratios: 20 parts potassium perchlorate, 2 parts barium nitrate, 1 part sulfur, 2 parts magnesium-aluminum alloy, 15 parts phenol-formaldehyde resin, 2 parts polyvinyl chloride, 5 parts starch, 3 parts copper oxide, and 20 parts 1,4-diamino-2,3-dihydroanthraquinone. The explosive is composed of the following components in the indicated weight ratio: 5 parts potassium nitrate, 15 parts ammonium perchlorate, 5 parts charcoal, 32 parts phenol-formaldehyde resin, 3 parts polyvinyl chloride, 15 parts sodium oxalate, 10 parts rice husk, and 5 parts sodium bicarbonate. The propellant is composed of the following components in the indicated weight ratios: 28 parts potassium nitrate, 12 parts strontium nitrate, 10 parts shellac, 5 parts strontium carbonate, and 5 parts starch.
[0006] The beneficial effects of this invention are that the purple smoke fireworks shell achieves high color rendering and good stability during nighttime ignition through a three-pronged synergistic design and multi-mechanism color rendering. By combining organic dye color rendering with metal combustion brightening, it overcomes the dependence of traditional flame color reactions on metal ions.
[0007] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0008] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of the firework shell that produces the purple smoke effect in the embodiment. Detailed Implementation
[0010] See appendix Figure 1 This describes a specific structure of the present invention. The firework shell that produces a purple smoke effect consists of a spherical projectile 3 filled with explosive charge 1 and effect charge 2, and a paper cup holder 5 containing propellant 4. The side wall of the paper cup holder 5 is provided with an ignition fuse 6 for igniting the propellant 4. The spherical projectile 3 and the paper cup holder 5 are connected by a fuse 7 to transmit ignition between the propellant 4 and the explosive charge 2. Explosive charge 1 is installed in the center of the inner cavity of the spherical projectile 3, and effect charge 2 is filled around explosive charge 1 in the inner cavity of the spherical projectile 3.
[0011] In the example, the effective drug is composed of the following components in the indicated weight ratios: 20 parts potassium perchlorate, 2 parts barium nitrate, 1 part sulfur, 2 parts magnesium-aluminum alloy, and phenol-formaldehyde resin (the compound's English name is Resinox, and its molecular formula is C). 48 H 42 15 parts of O7, 2 parts of polyvinyl chloride, 5 parts of starch, 3 parts of copper oxide, and 1,4-diamino-2,3-dihydroanthraquinone (the molecular formula of this compound is C). 14 H 12 20 parts of N2O2 (CAS No. 81-63-0) were mixed evenly according to the general method and granulated to obtain the final product.
[0012] The explosive is composed of the following components in the indicated weight ratios: 5 parts potassium nitrate, 15 parts ammonium perchlorate, 5 parts charcoal, 32 parts phenol-formaldehyde resin, 3 parts polyvinyl chloride, 15 parts sodium oxalate, 10 parts rice husk, and 5 parts sodium bicarbonate. The components are mixed evenly using conventional methods and then granulated to obtain the explosive.
[0013] The propellant is composed of the following components in the indicated weight ratios: 28 parts potassium nitrate, 12 parts strontium nitrate, 10 parts shellac, 5 parts strontium carbonate, and 5 parts starch. The components are mixed evenly using conventional methods and then granulated to obtain the final product.
[0014] Based on the projectile specifications and launch height design, in the example, taking a spherical projectile 1 with a diameter of 75mm as an example, its total amount of effect charge is about 300 grams; the total amount of detonating charge is about 10 grams; and the propellant is about 40 grams.
[0015] When ignited, the firework shell is placed inside the launch tube by the lifting rope 8, the ignition fuse is lit, the propellant in the paper cup holder explodes and launches the spherical shell into the air. The fuse ignited by the propellant ignites the detonating charge after a set delay and explodes the spherical shell. At the same time, the detonating charge ignites the effect charge to produce smoke. The smoke falls and hangs down, creating a spectacular display.
[0016] In the above technical solution, the effect agent, the detonating explosive, and the propellant achieve full-process matching of "launch-detonation-colorization" through the graded release of oxidizer, energy transfer adaptation, and smoke carrier regulation.
[0017] 1,4-Diamino-2,3-dihydroanthraquinone is used as the primary color source, with copper / potassium ions assisting in color development, resulting in a synergistic color emission mechanism. The primary color source sublimates at 500-600℃, releasing a 400-450nm violet spectrum upon molecular excitation. Copper oxide combustion generates CuCl2 molecules emitting 420-460nm blue light, and K⁺ in potassium perchlorate produces 404nm violet light, forming a spectral superposition with the primary color. The combustion of magnesium-aluminum alloy produces a white background, enhancing the contrast of the violet smoke and creating a nighttime enhancement effect, significantly lowering the visual threshold. Nighttime visual clarity is high. This invention does not directly employ a flame test mechanism, but rather indirectly enhances the light radiation intensity of the organic dye through the excitation energy provided by the combustion of metal powder (magnesium-aluminum alloy).
[0018] The potassium perchlorate and barium nitrate composite oxidation system controls the combustion rate, while the phenol-formaldehyde resin and polyvinyl chloride inhibit high-temperature decomposition and smoke aggregation, exhibiting good stability. Uniform mixing and granulation of all components ensures color uniformity.
[0019] It should also be noted that smoke effects typically require the combination and ignition of multiple single-color projectiles, such as the "Seven-Colored Auspicious Clouds" display. Given this, and considering requirements for effect matching, ignition coordination, safety supervision, and standardized production, the projectile specifications and propellant dosages of various colored fireworks shells need to be standardized. This places higher demands on the propellant design of each colored shell. Through the collaborative efforts of our technical team, we have successfully completed the design task. The propellant design for each colored fireworks shell is adapted to the standardized projectile specifications and propellant dosages. Standardized specifications simplify the manufacturing and ignition process, improve safety and performance consistency, and greatly facilitate safety supervision and control.
[0020] The embodiments of the present invention disclosed above are merely illustrative of the invention. The embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and describes these embodiments in conjunction with the accompanying drawings to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. However, the invention can be implemented in many ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the invention. Therefore, the invention is limited only by the claims and their full scope and equivalents, and not by the specific embodiments disclosed.
Claims
1. A firework shell that produces a purple smoke effect, comprising a spherical projectile filled with an explosive charge and an effect charge, and a paper cup holder containing the propellant, the paper cup holder being provided with an ignition fuse for igniting the propellant, and the spherical projectile and the paper cup holder being connected by a fuse for ignition; characterized in that, The explosive charge is installed at the center of the spherical projectile's internal cavity, and the effect charge is filled around the explosive charge in the internal cavity of the spherical projectile; The effective drug is composed of the following components in the indicated weight ratios: 19-21 parts potassium perchlorate, 1-3 parts barium nitrate, 0.1-2 parts sulfur, 1-3 parts magnesium-aluminum alloy, 14-16 parts phenol-formaldehyde resin, 1-3 parts polyvinyl chloride, 4-6 parts starch, 2-4 parts copper oxide, and 19-21 parts 1,4-diamino-2,3-dihydroanthraquinone. The components are mixed evenly using conventional methods and then granulated to obtain the final product. The explosive is composed of the following components in the indicated weight ratios: 4-6 parts potassium nitrate, 14-16 parts ammonium perchlorate, 4-6 parts charcoal, 31-33 parts phenol-formaldehyde resin, 2-4 parts polyvinyl chloride, 14-16 parts sodium oxalate, 9-11 parts rice husk, and 4-6 parts sodium bicarbonate. The components are mixed evenly using general methods and then granulated to obtain the explosive. The propellant is composed of the following components in the indicated weight ratios: 27-29 parts potassium nitrate, 11-13 parts strontium nitrate, 9-11 parts shellac, 4-6 parts strontium carbonate, and 4-6 parts starch; the components are mixed evenly using conventional methods and then granulated to obtain the final product. When the fireworks are set off, the shells are placed inside the launcher barrel, the ignition fuse is lit, and the propellant in the paper cup holder explodes, launching the spherical shell into the air. The fuse ignited by the propellant ignites the detonating charge after a set delay, which explodes the spherical shell. At the same time, the detonating charge ignites the effect charge, producing smoke. The falling smoke creates a spectacular display.
2. The firework shell that produces a purple smoke effect as described in claim 1, characterized in that, The effective drug is composed of the following components in the indicated weight ratios: 20 parts potassium perchlorate, 2 parts barium nitrate, 1 part sulfur, 2 parts magnesium-aluminum alloy, 15 parts phenol-formaldehyde resin, 2 parts polyvinyl chloride, 5 parts starch, 3 parts copper oxide, and 20 parts 1,4-diamino-2,3-dihydroanthraquinone. The explosive is composed of the following components in the indicated weight ratio: 5 parts potassium nitrate, 15 parts ammonium perchlorate, 5 parts charcoal, 32 parts phenol-formaldehyde resin, 3 parts polyvinyl chloride, 15 parts sodium oxalate, 10 parts rice husk, and 5 parts sodium bicarbonate. The propellant is composed of the following components in the indicated weight ratios: 28 parts potassium nitrate, 12 parts strontium nitrate, 10 parts shellac, 5 parts strontium carbonate, and 5 parts starch.