Multi-stage explosion effect cylinder for combined fireworks

Abstract

The invention discloses a multi-stage explosion effect cylinder for combined fireworks. The multi-stage explosion effect cylinder is formed by sequentially sleeving and combining 3-5 cylinder bodies from top to bottom; the radial size and height of each barrel body are sequentially reduced from bottom to top, and the gravity center of a combination body formed by two or more than two barrel bodies deviates to the bottom end of the combination body; the lower part of the upper cylinder body is embedded, inserted and glued in the upper port of the lower cylinder body; each barrel is filled with effect medicine, and the bottom port of each barrel is closed and provided with a fire lead; the fire passing lead of the lowermost barrel is in fire transmission connection with the propellant powder in the launching barrel, and the fire passing leads of the other barrels are in fire transmission connection with the effect powder in the lower barrel. 3-5 times of burning explosion and corresponding firework effects can be generated, and the set-off effect is effectively enriched; it can be ensured that the secondary barrel body is pushed upwards to avoid the low explosion danger, the barrel explosion phenomenon caused by fire crossing sympathetic detonation is effectively avoided through the sleeving structure of the multiple barrel bodies, and setting-off safety is ensured; and meanwhile, the production of each barrel is compatible with the existing production process, and the production is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to an effect cylinder of a combination firework. BACKGROUND

[0002] In the prior art, the effect cylinder (also known as inner cylinder or effect piece) of a combination firework has only one cylinder body, the cylinder body is filled with effect medicine, the two ends of the cylinder body are closed, and a through-burning fuse is arranged at the lower end of the cylinder body. The effect cylinder is placed above the propellant in the launching cylinder, and the propellant is ignited to burn and explode to push the effect cylinder to be launched into the air. The through-burning fuse is ignited when the propellant burns and explodes, and after a set delay, the through-burning fuse ignites the effect medicine in the effect cylinder to display the corresponding fireworks effect. The disadvantage is that the effect cylinder launched each time can only produce one burn and explosion and the corresponding fireworks effect, which is not conducive to the richness of the effect.

[0003] In the prior art, there are also other types of firecracker products with two layers of charges in one cylinder body to achieve two burns and explosions. For example:

[0004] Double-bang firecracker, also known as "two kicking feet" in folk, is named because the gunpowder is filled in two layers and produces two bangs when fired. The double-bang firecracker has a double-layer gunpowder design in the cylinder body to achieve the double-bang effect. After the cylinder body is ignited on the ground, the first bang (first stage) pushes the firecracker to a high altitude and triggers the second bang (second stage). However, if the first bang is ignited after the firecracker is launched into the air, the direction of the launched firecracker cannot be controlled, and it may be launched towards the ground, causing the second bang to appear low, which is very dangerous. Therefore, it is only suitable for ground firing, and the ignition must be strictly according to the national standard and vertically erected on the ground. It is difficult to be applied to the effect cylinder of a combination firework.

[0005] For example, the "cylinder launching type rocket firework" disclosed in the Chinese Utility Model Patent Document CN2341114Y published on September 29, 1999 has a first bright bead layer 8, a gunpowder layer 9, a second bright bead layer 10 and other multi-layer charges in the cylinder body of the rocket body 11. The first bright bead layer 8 (first stage) ignites the gunpowder layer 9 to continue to push the arrowhead (i.e. sealing material 12) to continue to rise and ignite the second bright bead layer 10 (second stage) when it explodes in the air. Under the action of the tail wing 7 and the arrowhead, the second stage can continue to rise upwards when it is ignited, which can avoid the risk of low explosion. However, the rocket body 11 needs to be provided with a tail wing and a conical arrowhead, which has a complex structure, difficult assembly and different effects, and is only suitable for rocket fireworks. It is also difficult to be applied to the effect cylinder of a combination firework.

[0006] Moreover, the prior art can only achieve two-stage burn and explosion through layered charging, and the two layers of gunpowder are prone to cross-fire and sympathetic detonation, causing quality problems of the explosion cylinder. SUMMARY

[0007] In order to solve the above-mentioned defects, the technical problem to be solved by the present application is to provide a multi-stage opening explosion effect cylinder suitable for being used as a combined firework effect component, which can produce 3-5 times of combustion and explosion and corresponding fireworks effects. In order to solve the above-mentioned technical problem, the technical scheme adopted by the present application is that a multi-stage opening explosion effect cylinder of a combined firework is characterized in that it is composed of 3-5 cylinder bodies which are sequentially and upwardly sleeved; the radial dimension and the height of each cylinder body from bottom to top are sequentially reduced, and the gravity center of the combined body composed of two or more cylinder bodies is deviated to the bottom end of the combined body; the lower part of the upper cylinder body is nested and inserted into the upper end port of the lower cylinder body and is glued; each cylinder body is filled with effect medicine, the bottom port of the cylinder body is closed and a fire passing lead is installed; the fire passing lead of the lowest cylinder body is connected with the transmission of the launching charge in the launching cylinder, and the fire passing leads of the remaining cylinder bodies are connected with the transmission of the effect medicine in the lower cylinder body.

[0008] The beneficial effects of the present application are that, by adopting the technical scheme of the present application, 3-5 times of combustion and explosion and corresponding fireworks effects can be produced, and the combustion effect is effectively enriched; the secondary cylinder body can be pushed upward to avoid low explosion danger, the sleeving structure of the multiple cylinder bodies effectively avoids the explosion cylinder phenomenon caused by stringing and explosion, and the combustion safety is ensured; meanwhile, the production of each cylinder body is compatible with the existing production process, and the production is convenient.

[0009] In order to ensure that there is no low explosion phenomenon, preferably, the delay time of the fire passing lead of each cylinder body from bottom to top is sequentially reduced. Further, the delay time of the fire passing lead of each cylinder body from bottom to top is sequentially reduced by 0.8-1.2 seconds. Especially 0.9-1.1 seconds.

[0010] In one embodiment, the multi-stage opening explosion effect cylinder is composed of a primary cylinder body, a secondary cylinder body and a tertiary cylinder body which are sequentially and upwardly sleeved; the primary cylinder body has an inner diameter of 40 mm, an outer diameter of 45 mm, a height of 120 mm and a fire passing lead burning speed of 70-80 s / m; the secondary cylinder body has an inner diameter of 32 mm, an outer diameter of 38 mm, a height of 50 mm and a fire passing lead burning speed of 40-50 s / m; the tertiary cylinder body has an inner diameter of 25 mm, an outer diameter of 30 mm, a height of 40 mm and a fire passing lead burning speed of 10-20 s / m; the length of the fire passing lead of the three cylinder bodies is 3.5 cm.

[0011] The gluing of the cylinder body can adopt a general adhesive. Preferably, the adhesive used for the gluing is composed of components with the following weight ratio: vinyl acetate 50%; phenolic resin 20%; talcum powder 10%; sodium hydroxide 10%; hydrochloric acid 10%.

[0012] The preparation method of the adhesive comprises the following steps:

[0013] S1 raw material pretreatment: talcum powder is sieved to ensure uniform particle size, and phenolic resin is preheated to reduce viscosity;

[0014] S2 mixing: in the reaction kettle with stirring, add vinyl acetate, slowly add phenolic resin, keep the temperature at 60-70℃, add sodium hydroxide solution;

[0015] S3 reaction control: temperature rise to 80-85℃, reaction for 1-2 hours, during continuous stirring;

[0016] S4 filler addition: after cooling to 60℃, add talcum powder, high-speed dispersion;

[0017] S5 neutralization and adjustment: slowly add hydrochloric acid solution to adjust the pH to 6-7.

[0018] The adhesive using the formula provides better adhesion under static load, ensuring the overall flight of the combination; when the effect drug explodes, the cylinder where the explosion occurs is relatively easy to separate from other inner cylinders.

[0019] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above at the same time.

[0020] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a 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 specification, the illustrative expressions 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 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 a person 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.

[0021] 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.

[0022] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. 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 specified and limited.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, 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.

[0024] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features 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.

[0025] 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 are not the only embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 The schematic diagram of the appearance structure of the multi-stage opening effect cylinder of the embodiment;

[0027] Fig. 2 The schematic diagram of the internal structure of the multi-stage opening effect cylinder of the embodiment;

[0028] Fig. 3 The schematic diagram of the combined assembly structure of the multi-stage opening effect cylinder and the launching cylinder of the embodiment. DETAILED DESCRIPTION

[0029] Referring to the accompanying drawings, a specific structure of the present application is shown. The multi-stage effect tube of the combined firework is composed of three tubes which are connected in sequence from bottom to top. The three tubes are named as follows from bottom to top: the first tube 1 (the lowermost tube), the second tube 2, and the third tube 3 (the uppermost tube). The combination of the three tubes is called the first combination, and the combination of the second tube 2 and the third tube 3 is called the second combination. Figs. 1-3 The radial dimension and height of the three tubes decrease from bottom to top, so that the center of gravity of the combination of two or more tubes is biased to the bottom end of the combination. In the example, the inner diameter (diameter, same below) of the first tube 1 is 40 mm, the outer diameter is 45 mm, the height is 120 mm, and the burning speed of the first ignition fuse 101 is 70-80 s / m (second / meter, same below); the inner diameter of the second tube 2 is 32 mm, the outer diameter is 38 mm, the height is 50 mm, and the burning speed of the second ignition fuse 201 is 40-50 s / m; the inner diameter of the third tube 3 is 25 mm, the outer diameter is 30 mm, the height is 40 mm, and the burning speed of the third ignition fuse 301 is 10-20 s / m; the length of the ignition fuse of the three tubes is 3.5 cm. The delay time of the ignition fuse of the three tubes decreases by 1.05 seconds from bottom to top to ensure that there is no low-burning phenomenon.

[0030] Among the three tubes, the lower part of the second tube 2 is nested, inserted and glued in the upper port of the first tube 1; the lower part of the third tube 3 is nested, inserted and glued in the upper port of the second tube 2.

[0031] The inner cavities of the three tubes are all filled with effect drugs 4, and the bottom ports of the three tubes are all closed by round paper boards 5 with central holes and are installed with ignition fuses, the root ends of which are buried in the effect drugs 4, and the free ends of which are led out through the central holes of the round paper boards 5. The free end of the first ignition fuse 101 is connected with the transmission of the ignition powder 8 in the launching tube 7, the free end of the second ignition fuse 201 is connected with the transmission of the effect drugs in the first tube 1, and the free end of the third ignition fuse 301 is connected with the transmission of the effect drugs in the second tube 2.

[0032] The top port of the first tube 1 is closed by the second tube 2, the top port of the second tube 2 is closed by the third tube 3, and the top port of the third tube 3 is provided with a closing layer 302.

[0033] The nested structure of the above multiple tubes effectively avoids the phenomenon of burst tube caused by string fire and sympathetic detonation, and ensures the safety of burning.

[0034] In the example, in order to ensure that each ignition fuse is ignited by the ignition powder 8 or the effect drugs 4, the bottom end face (below the round paper board 5) of each tube is provided with an ignition powder 9.

[0035]

[0036] ​The structure of each cylinder constituting the multi-stage opening effect cylinder is the same as the existing inner cylinder, and no other auxiliary structure (such as a tail wing and a conical arrow) needs to be arranged, so that the multi-stage opening effect cylinder can be mass processed according to the production mode of the existing inner cylinder and combined, which is compatible with the existing production process and convenient for production.

[0037] When produced, the first-stage assembly is loaded into the launching cylinder 7. When fired, the launching powder 8 is ignited by the ignition lead 11, the launching powder 8 burns to generate gas and does work to push the first-stage assembly to be launched and rise by the launching round paperboard 10, and the overfire lead 101 of the first-stage cylinder 1 is ignited by the launching powder 8 to enter the delay stage; since the gravity center of the first-stage assembly is biased to the bottom end of the assembly, the first-stage assembly forms a posture with the bottom end downward under the action of air resistance when flying in the air; the overfire lead 101 completing the delay ignites the effect drug of the first-stage cylinder 1, and the effect drug burns and explodes to push the second-stage assembly upward and ignite the overfire lead 201 of the second-stage cylinder 2.

[0038] Similarly, the second-stage assembly forms a posture with the bottom end downward under the action of air resistance when flying in the air; the second-stage cylinder 2 burns and explodes to push the third-stage cylinder 3 upward and ignite the overfire lead 301 of the third-stage cylinder 3. The third-stage cylinder 3 burns and explodes.

[0039] As can be seen from the above, the above technical scheme can produce three times of burning and explosion and corresponding fireworks effects, effectively enriching the firing effect; and can ensure that the second-stage assembly and the third-stage cylinder 3 are pushed upward to avoid low-firing danger.

[0040] In other embodiments, four or five cylinder assemblies are combined in the same way, which will not be described here.

[0041] In an example, the adhesive used for the gluing is composed of components in the following weight ratio: 50% of vinyl acetate; 20% of phenolic resin; 10% of talcum powder; 10% of sodium hydroxide; and 10% of hydrochloric acid.

[0042] The preparation method of the adhesive includes the following steps:

[0043] S1, raw material pretreatment: talcum powder is passed through a 200-mesh screen to ensure uniform particle size, phenolic resin is preheated to 40-50 DEG C to reduce viscosity, and sodium hydroxide is prepared into a 10% aqueous solution;

[0044] S2, mixing: in a stirred reaction kettle, add vinyl acetate, slowly add phenolic resin, keep the temperature at 60-70 DEG C, and add the sodium hydroxide solution;

[0045] S3, reaction control: heat to 80-85 DEG C, react for 1-2 hours, continuously stir during the period, the stirring speed is 300-400 rpm; monitor the pH value change, and control the pH value to be in the range of 8-9;

[0046] S4 filler addition: after cooling to 60℃, add talcum powder, high-speed dispersion at 1000-1200 rpm stirring speed for 30 minutes to ensure uniform dispersion of the filler;

[0047] S5 neutralization and adjustment: slowly add 10% hydrochloric acid solution to adjust the pH to 6-7, control the acid addition rate to prevent local overheating

[0048] S6 post-treatment: filter out undispersed particles, vacuum degassing treatment (pressure ~ 0.08 MPa, 30 minutes), check the viscosity (Brookfield viscometer, 25℃) before filling.

[0049] The adhesive using the formula provides good adhesion under static load, ensuring the overall flight of the combination; when the effect medicine explodes, the cylinder that explodes and other inner cylinders are relatively easy to separate. The possible reason is that the impact load allowed by the glued surface is suitable for the impact force of the effect medicine explosion.

[0050] In the present application, the effect medicine 4, propellant 8 and primer 9 can be used according to the known formula. As an exemplary description, the medicine formula used in the following examples is described as follows:

[0051] Propellant: pine charcoal 30%, potassium nitrate 40%, sulfur 30%.

[0052] Ignition medicine: military powder 60%, potassium perchlorate 20%, alloy powder 10%, phenolic resin 10%.

[0053] The effect medicine of the first cylinder uses the crown green flash effect:

[0054] Crown: military powder 50%, pine charcoal 30%, strong glue powder 5%, potassium perchlorate 15.

[0055] Green flash: potassium perchlorate 5%, barium nitrate 60%, special alloy 25%, nano ethyl 10%, sulfur 5%.

[0056] The effect medicine of the second cylinder uses the gold crown effect:

[0057] Gold crown: pine charcoal 30%, potassium perchlorate 5%, military powder 40%, sulfur 5%, yellow light titanium 140-180 mesh 20%.

[0058] The effect medicine of the third cylinder uses the red coconut effect:

[0059] Red coconut: potassium perchlorate 40%, alloy powder 20%, strontium carbonate 20%, resin 6%, paint sheet 4, polyvinyl chloride 10%.

[0060] The above effect high-low delay matching forms a good burning and watching effect.

[0061] Appendix: Overfire fuse length setting in prior art.

[0062] Initial velocity determines the maximum height: the effect cylinder obtains initial velocity (v0) through the explosion of propellant, and does uniform deceleration under the action of gravity (g) and air resistance (F=0.25mg), the maximum height h satisfies:

[0063] For example, the theoretical maximum height of the effect cylinder with initial velocity of 35m / s is about 49m.

[0064] Delay fuse burning speed control: the delay fuse burns at a constant speed (such as 2cm / s, 50s / m), and the relationship between its length (l) and delay time (t) is: l=v×t.

[0065] To ensure that the burning time t matches the time for the effect cylinder to rise to the target height, the height-delay time relationship is: for example, when the theoretical maximum height is 49m, if it is required that the explosion occurs at 96% of the height (47.04m), the remaining speed v=7m / s, corresponding to the flight time difference Δt=2.8s, so at least 5.6cm of fuse (2cm / s×2.8s) is needed. Based on the error compensation mechanism, 20% margin will be reserved in actual design, so the fuse is set to 7cm.

[0066] The above disclosed embodiments of the present application are only used to help explain the present application. The embodiments do not describe all the details, nor limit the present application to only the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and combines the embodiments with the drawings to specifically describe these embodiments, in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the scope of the present application. Therefore, the present application is limited only by the claims and their full scope and equivalents, not by the disclosed specific embodiments.

Claims

1. A multi-stage explosion effect tube of a combination firework, characterized in that: It is composed of 3 to 5 cylinders that are sequentially connected in sequence from top to bottom; the radial size and height of each cylinder decrease from bottom to top, and the center of gravity of the combination composed of two or more cylinders is biased towards the bottom end of the combination; the lower part of the upper cylinder is nested, inserted and glued into the upper port of the lower cylinder; each cylinder is filled with effect medicine, the bottom port of the cylinder is closed and a firing fuse is installed; the firing fuse of the lowest cylinder is connected to the propellant in the launching tube, and the firing fuses of the remaining cylinders are connected to the effect medicine in the lower cylinder.

2. The multi-stage explosion effect tube of a combined firework according to claim 1, characterized in that: The delay time of the fire fuse of each cylinder decreases from bottom to top.

3. The multi-stage explosion effect tube of a combined firework according to claim 1, characterized in that: From bottom to top, the delay time of the fire fuse of each cylinder decreases by 0.8 to 1.2 seconds.

4. The multi-stage explosion effect tube of a combined firework according to claim 1, characterized in that: From bottom to top, the delay time of the fire fuse of each cylinder decreases by 0.9 to 1.1 seconds.

5. The multi-stage explosion effect tube of a combined firework according to claim 1, characterized in that: The multi-stage explosion effect tube is composed of a first-stage tube body, a second-stage tube body, and a third-stage tube body which are sequentially connected in an upper and lower manner; the first-stage tube body has an inner diameter of 40 mm, an outer diameter of 45 mm, and a height of 120 mm, and the burning speed of the overfire fuse is 70 to 80 s / m; the second-stage tube body has an inner diameter of 32 mm, an outer diameter of 38 mm, and a height of 50 mm, and the burning speed of the overfire fuse is 40 to 50 s / m; the third-stage tube body has an inner diameter of 25 mm, an outer diameter of 30 mm, and a height of 40 mm, and the burning speed of the overfire fuse is 10 to 20 s / m; the length of the overfire fuses of the three tubes is 3.5 cm.

6. The multi-stage explosion effect tube of a combined firework according to claim 1, characterized in that: The adhesive used for gluing is composed of the following components in weight ratio: 50% vinyl acetate; 20% phenolic resin; 10% talcum powder; 10% sodium hydroxide; and 10% hydrochloric acid.

7. The multi-stage explosion effect tube of a combined firework according to claim 6, characterized in that: The preparation method of the adhesive comprises the following steps: S1 Raw material pretreatment: talc powder is sieved to ensure uniform particle size, and phenolic resin is preheated to reduce viscosity; S2 Mixing: Add vinyl acetate to a stirred reactor, slowly add phenolic resin, maintain the temperature at 60-70°C, and add sodium hydroxide solution; S3 reaction control: heat to 80-85°C and react for 1-2 hours with continuous stirring; S4 filler addition: After cooling to 60℃, add talcum powder and disperse at high speed; S5 Neutralization and adjustment: Slowly add hydrochloric acid solution to adjust the pH to 6-7.

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