Mould pressing firework outer barrel

Abstract

The utility model relates to the technical field of fireworks, and discloses a mould pressing firework outer barrel which comprises an outer barrel body. The outer cylinder body is provided with a plurality of charging cavities for charging pyrotechnic compositions, the charging cavities are vertically arranged, and the upper ends of the charging cavities are open; the bottom of the outer cylinder body is provided with a lead groove used for coiling a lead, and the lead groove is a continuous groove. A plurality of fire stringing grooves are formed in the groove bottom of the lead groove, a plurality of fire transferring hole sets are formed in the groove bottom of each fire stringing groove, and the fire transferring hole sets correspond to the charging cavities in a one-to-one mode; each flash hole group comprises at least one flash hole; the fire transferring holes are respectively communicated with the bottom of the charging cavity and the fire stringing groove; a blocking groove is formed between every two adjacent fire stringing grooves, and the blocking grooves are formed in the wire leading grooves. According to the technical scheme provided by the utility model, the continuous firing of the molded fireworks is simpler, the setting-off effect of the molded fireworks is favorably improved, meanwhile, the economic cost can be reduced, the setting-off safety coefficient of setting-off is improved, and dangerous wastes are prevented from being generated in the recovery process.

Description

Technical Field

[0001] The utility model relates to the technical field of fireworks, and particularly relates to an externally molded firework tube. Background Art

[0002] Externally molded fireworks refer to fireworks made through a die pressing process. Compared with traditional paper tube fireworks, externally molded fireworks greatly improve production efficiency and reduce production costs. Therefore, they have been widely used. The externally molded firework tube refers to the outer shell used to contain pyrotechnic composition during the production of fireworks, usually made through die pressing. The die pressing process can make the externally molded firework tube have uniform dimensions and shapes, thus ensuring good stability and consistency when the fireworks are set off.

[0003] During daily fireworks displays, the design of the fireworks display rhythm is very important for improving the artistry and ornamental value of the fireworks show. Existing externally molded fireworks are usually set off one by one in sequence during the fireworks display, and the firing rhythm cannot be changed through continuous firing. To achieve continuous firing, additional leads are usually required to connect multiple cavities in series, which not only makes the processing procedure more complex but also increases the production cost. Therefore, the utility model proposes an externally molded firework tube to simplify the continuous firing of externally molded fireworks. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an externally molded firework tube to simplify the continuous firing of externally molded fireworks.

[0005] To achieve the above purpose, the externally molded firework tube proposed by the utility model includes an outer tube body; the outer tube body is provided with a plurality of charging cavities for filling pyrotechnic composition, the charging cavities are vertically arranged and open at the upper end; a lead groove for coiling the lead is arranged at the bottom of the outer tube body, and the lead groove is a continuous groove; a plurality of fire connecting grooves are formed at the bottom of the lead groove, and a plurality of fire transmitting hole groups are formed at the bottom of each fire connecting groove, and the fire transmitting hole groups correspond to the charging cavities one by one; each fire transmitting hole group includes at least 1 fire transmitting hole; the fire transmitting holes respectively communicate with the bottom of the charging cavity and the fire connecting groove; a blocking groove is arranged between two adjacent fire connecting grooves, and the blocking groove is formed in the lead groove.

[0006] Preferably, the depth of the blocking groove is greater than the depth of the lead groove, and the width of the blocking groove is greater than the width of the lead groove.

[0007] Preferably, the width of the fire connecting groove is less than the width of the lead groove; the width of the fire transmitting hole is greater than or equal to the width of the fire connecting groove.

[0008] Preferably, the lead wire groove includes a first lead wire groove extending linearly, and a second lead wire groove connecting two adjacent first lead wire grooves; a blocking groove is provided between the first lead wire groove and the second lead wire groove; an arc corner is provided at the corner of the second lead wire groove or the second lead wire groove is an arc-shaped groove.

[0009] Preferably, the series-fire groove includes a first series-fire groove provided in the first lead wire groove and a second series-fire groove provided in the second lead wire groove; a plurality of the fire-transfer hole groups are formed at the bottom of the first series-fire groove; at least one of the fire-transfer hole groups is formed at the bottom of the second series-fire groove; a blocking groove is provided between the first series-fire groove and the second series-fire groove.

[0010] Preferably, a support frame protruding downward is formed at the bottom edge of the outer cylinder body.

[0011] Preferably, the support frame is respectively provided with a wire inlet, a wire outlet and a plurality of ventilation openings in a penetrating manner; the wire inlet and the wire outlet are respectively arranged at both ends of the lead wire groove; the ventilation openings are arranged on the side wall of the support frame where the wire inlet and the wire outlet are not provided.

[0012] Preferably, the heights of the wire inlet and the wire outlet are both equal to the height of the support frame; the height of the ventilation opening is less than the height of the support frame.

[0013] Preferably, the fire-transfer hole groups in the same series-fire groove are arranged at equal intervals.

[0014] Preferably, the charge cavity is a cylindrical cavity; the blocking groove is a circular groove; the fire-transfer hole is a round hole.

[0015] In the technical solution of the present utility model, the lead wire is arranged at the bottom of the outer cylinder body through the lead wire groove. A fire series groove is opened at the bottom of the lead wire groove, and a plurality of fire transmission hole groups corresponding to the charge cavities one by one are opened at the bottom of the fire series groove. Therefore, when the lead wire is ignited, the lead wire will ignite the gunpowder in the charge cavity through the fire transmission hole. The flame of the deflagration of the gunpowder can move along the fire series groove to other fire transmission holes located in the same fire series groove 3, thereby igniting the gunpowder in other charge cavities, and further realizing the continuous firing of fireworks in a plurality of charge cavities; each fire transmission hole group includes at least 1 fire transmission hole. Therefore, the fire transmission hole can ensure that the gunpowder in each corresponding charge cavity is ignited, which is beneficial to the transfer of the flame after the deflagration of the gunpowder between the fire transmission holes in the same fire series groove; a blocking groove is arranged between two adjacent fire series grooves. Therefore, the flame in one fire series groove will be blocked by the blocking groove, so that after the continuous firing of the fireworks corresponding to one fire series groove, the fireworks corresponding to another fire series groove will start to be set off after a certain time interval, thus generating a change in the firing rhythm. In summary, the molded fireworks outer cylinder is simple to process and has a low production cost, which can make the continuous firing of fireworks simpler, and at the same time make the fireworks produce a change in the firing rhythm, which is beneficial to improving the firing effect of the fireworks. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic diagram of the bottom structure of the molded fireworks outer cylinder of the present utility model;

[0018] Figure 2 It is a schematic diagram of the top structure of the molded fireworks outer cylinder of the present utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the molded fireworks outer cylinder of the present utility model along A-A.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1 - outer cylinder body; 2 - lead wire groove; 3 - fire series groove; 4 - fire transmission hole; 5 - blocking groove; 6 - support frame; 7 - inlet; 8 - outlet; 9 - ventilation port; 10 - charge cavity.

[0022] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating 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 utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" 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 may be the internal connection 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 utility model can be understood according to specific situations.

[0027] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0028] The present utility model provides a molded fireworks outer cylinder.

[0029] Please refer to Figures 1 to 3, the molded fireworks outer cylinder includes an outer cylinder body 1; the outer cylinder body 1 is provided with a plurality of charge cavities 10 for filling pyrotechnic compositions, the charge cavities 10 are vertically arranged and open at the upper end; the bottom of the outer cylinder body 1 is provided with a lead groove 2 for coiling the lead wire, and the lead groove 2 is a continuous groove; a plurality of fire-transfer grooves 3 are formed in the bottom of the lead groove 2, and a plurality of fire-transfer hole groups are formed in the bottom of each fire-transfer groove 3, and the fire-transfer hole groups correspond to the charge cavities 10 one by one; each fire-transfer hole group includes at least 1 fire-transfer hole 4; the fire-transfer holes 4 communicate with the bottom of the charge cavity 10 and the fire-transfer groove 3 respectively; a blocking groove 5 is arranged between two adjacent fire-transfer grooves 3, and the blocking groove 5 is formed in the lead groove 2.

[0030] In the technical solution of the present invention, the lead wire is arranged at the bottom of the outer cylinder body 1 through the lead groove 2, the fire-transfer groove 3 is formed in the bottom of the lead groove 2, and a plurality of fire-transfer hole groups corresponding to the charge cavities 10 one by one are formed in the bottom of the fire-transfer groove 3. Therefore, when the lead wire is ignited, the lead wire will ignite the gunpowder in the charge cavity 10 through the fire-transfer hole 4, and the flame of the deflagration of the gunpowder can move along the fire-transfer groove 3 to other fire-transfer holes 4 located in the same fire-transfer groove 3, so as to ignite the gunpowder in other charge cavities 10, and further realize the continuous firing of fireworks in a plurality of charge cavities 10; each fire-transfer hole group includes at least 1 fire-transfer hole 4. Therefore, the fire-transfer hole 4 can ensure that the gunpowder in each corresponding charge cavity 10 is ignited, which is beneficial to the transfer of the flame after the deflagration of the gunpowder between the fire-transfer holes 4 in the same fire-transfer groove 3; a blocking groove 5 is arranged between two adjacent fire-transfer grooves 3. Therefore, the flame in one fire-transfer groove 3 will be blocked by the blocking groove 5, so that after the continuous firing of the fireworks corresponding to one fire-transfer groove 3, the fireworks corresponding to another fire-transfer groove 3 will start to burn after a certain time interval, thus generating a change in the firing rhythm. To sum up, the molded fireworks outer cylinder is simple to process and has a low production cost, can make the continuous firing of fireworks simpler, and at the same time makes the fireworks generate a change in the firing rhythm, which is beneficial to improving the firing effect of the fireworks.

[0031] The number of the fire-transfer hole groups in each fire-transfer groove 3 can be set according to requirements, so as to realize the continuous firing of different numbers of fireworks and make the fireworks burn with different rhythms, and the number of the fire-transfer holes 4 included in each fire-transfer hole group can be different. The length of the fire-transfer groove 3 is set according to the number of the fire-transfer hole groups arranged in the groove. In this embodiment, one of the fire-transfer grooves 3 is provided with 3 fire-transfer hole groups, and the other fire-transfer groove 3 is provided with 4 fire-transfer hole groups. In this embodiment, each fire-transfer hole group includes 2 fire-transfer holes 4. In another embodiment, some of the fire-transfer hole groups include 1 fire-transfer hole 4, and some of the fire-transfer hole groups include 2 fire-transfer holes 4.

[0032] Specifically, the blocking groove 5 can be a circular groove or a rectangular groove; the width of the lead groove 2 is equal to or less than the diameter of the lead, so that the lead can be clamped in the lead groove 2, facilitating the installation of the lead and preventing the lead from falling off easily after installation; after the lead is arranged in the lead groove 2, the lead groove 2 and the blocking groove 5 are sealed with glue, which can prevent the lead from falling off and improve the moisture resistance inside the lead and the molded fireworks outer cylinder at the same time. The glue can be moisture-proof glue.

[0033] Preferably, the depth of the blocking groove 5 is greater than the depth of the lead groove 2, and the width of the blocking groove 5 is greater than the width of the lead groove 2.

[0034] Specifically, the blocking groove 5 can be a circular groove or a rectangular groove. The depth of the blocking groove 5 is greater than the depth of the lead groove 2, and the width of the blocking groove 5 is greater than the width of the lead groove 2, which can make the blocking effect of the blocking groove 5 better and provide more attachment space for the glue, so that the glue can firmly fix the lead while cutting off the channel of gunpowder deflagration and preventing cross-fire between adjacent string-fire grooves 3.

[0035] Preferably, the width of the string-fire groove 3 is less than the width of the lead groove 2; the width of the fire-transfer hole 4 is greater than or equal to the width of the string-fire groove 3.

[0036] Specifically, the width of the string-fire groove 3 is slightly less than the width of the lead groove 2 to prevent the lead from entering the string-fire groove 3 and affecting the transfer of the flame of gunpowder deflagration in the string-fire groove 3. In this embodiment, the width of the string-fire groove 3 is 1 mm less than the width of the lead groove 2. The width of the fire-transfer hole 4 being greater than or equal to the width of the string-fire groove 3 is beneficial to igniting the gunpowder in the charge cavity 10. The width of the fire-transfer hole 4 is less than or equal to the width of the lead groove 2. In one embodiment, the width of the fire-transfer hole 4 is equal to the width of the string-fire groove 3, and in another embodiment, the width of the fire-transfer hole 4 is equal to the width of the lead groove 2.

[0037] Preferably, the lead groove 2 includes a first lead groove extending linearly and a second lead groove connecting two adjacent first lead grooves; the blocking groove 5 is arranged between the first lead groove and the second lead groove; an arc corner is arranged at the corner of the second lead groove or the second lead groove is an arc-shaped groove. This can reduce the folding degree of the lead at the corner of the lead groove 2, prevent the lead from being worn or broken during the folding process, and avoid product quality problems caused by lead breakage.

[0038] Specifically, one end of the second lead groove communicates with one end of one of the first lead grooves, and the other end of the second lead groove communicates with the same end of another adjacent first lead groove. In this embodiment, the multiple first lead grooves are parallel to each other, and the second lead groove is an arc-shaped groove.

[0039] Preferably, the fire series groove 3 includes a first fire series groove provided in the first lead groove and a second fire series groove provided in the second lead groove; a plurality of the fire transfer hole groups are provided at the bottom of the first fire series groove; at least 1 fire transfer hole group is provided at the bottom of the second fire series groove; a blocking groove 5 is provided between the first fire series groove and the second fire series groove.

[0040] Specifically, different numbers of the fire transfer hole groups can be provided between the first fire series grooves and between the first fire series groove and the second fire series groove, so as to make the fireworks display more rhythmical. In this embodiment, one of the first fire series grooves is provided with 3 fire transfer hole groups, another fire series groove is provided with 4 fire transfer hole groups, and one of the second fire series grooves is provided with 1 fire transfer hole group.

[0041] Preferably, a support frame 6 protruding downward is formed at the bottom edge of the outer cylinder body 1. The support frame 6 is used to lift the outer cylinder body 1 off the ground, which is beneficial to moisture-proof and damage-proof. In this embodiment, the height of the support frame 6 is 1 cm.

[0042] Preferably, the support frame 6 is respectively provided with a wire inlet 7, a wire outlet 8 and a plurality of ventilation openings 9; the wire inlet 7 and the wire outlet 8 are respectively arranged at both ends of the lead groove 2; the ventilation openings 9 are arranged on the side wall of the support frame 6 where the wire inlet 7 and the wire outlet 8 are not provided.

[0043] Specifically, the lead enters the lead groove 2 from the wire inlet 7 and leaves the lead groove 2 from the wire outlet 8, which is beneficial to the installation of the lead. In this embodiment, the wire inlet 7 and the wire outlet 8 are located on the same side of the support frame 6.

[0044] Specifically, the ventilation openings 9 are arranged on the other side of the support frame 6. Further, the ventilation openings 9 on the opposite sides of the support frame 6 face each other. In this embodiment, the number of the ventilation openings is 5. On the one hand, the ventilation openings are beneficial to the ventilation at the bottom of the molded fireworks outer cylinder to prevent the fireworks from getting wet; on the other hand, when gunpowder gas leaks out from the bottom surface of the fireworks, the gas pressure can be released in time to avoid accidents caused by the fireworks tipping over.

[0045] Preferably, the heights of the wire inlet 7 and the wire outlet 8 are both equal to the height of the support frame 6; the height of the ventilation opening 9 is less than the height of the support frame 6.

[0046] The heights of the inlet port 7 and the outlet port 8 facilitate the leading wire to enter and exit the support frame 6, and the height of the ventilation port 9 is conducive to ensuring the stability of the molded fireworks outer cylinder while ensuring ventilation. Specifically, the inlet port 7, the outlet port 8, and the ventilation port 9 are all rectangular ports. In this embodiment, the heights of the inlet port 7 and the outlet port 8 are 1 cm, and the height of the ventilation port 9 is 6 mm.

[0047] Preferably, each of the fire-transfer hole groups located in the same fire-transfer groove 3 is arranged at equal intervals.

[0048] Specifically, the charge cavities 10 corresponding to the fire-transfer hole groups in the same fire-transfer groove 3 are arranged at equal intervals, making the arrangement of the charge cavities 10 more reasonable and beautiful. The equal interval arrangement of each fire-transfer hole group is conducive to igniting the gunpowder in the charge cavities 10 corresponding to the other fire-transfer hole groups in the same fire-transfer groove 3, making the fireworks firing in succession more accurate.

[0049] Preferably, the charge cavity 10 is a cylindrical cavity; the blocking groove 5 is a circular groove; the fire-transfer hole 4 is a circular hole. This is not only conducive to the beauty of the molded fireworks outer cylinder, but also makes the production and processing of the molded fireworks outer cylinder simpler and conducive to cost reduction.

[0050] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A molded firework outer tube, characterized in that: The invention comprises an outer cylinder body (1); the outer cylinder body (1) is provided with a plurality of charge cavities (10) for filling pyrotechnic powder, the charge cavities (10) are arranged vertically and have an upper end open; the bottom of the outer cylinder body (1) is provided with a wire guide groove (2) for winding a wire guide, the wire guide groove (2) is a continuous groove; the bottom of the wire guide groove (2) is provided with a plurality of fire-transmitting grooves (3), the bottom of each fire-transmitting groove (3) is provided with a plurality of fire-transmitting hole groups, the fire-transmitting hole groups and the charge cavities (10) correspond one to one; each fire-transmitting hole group comprises at least one fire-transmitting hole (4); the fire-transmitting holes (4) are respectively connected to the bottom of the charge cavity (10) and the fire-transmitting groove (3); a blocking groove (5) is provided between two adjacent fire-transmitting grooves (3), and the blocking groove (5) is provided in the wire guide groove (2).

2. The molded firework outer tube according to claim 1, characterized in that: The depth of the blocking groove (5) is greater than the depth of the lead groove (2), and the width of the blocking groove (5) is greater than the width of the lead groove (2).

3. The molded firework outer tube according to claim 2, characterized in that: The width of the fire string groove (3) is smaller than the width of the lead groove (2); the width of the fire transmission hole (4) is greater than or equal to the width of the fire string groove (3).

4. The molded firework outer tube according to claim 2, characterized in that: The lead wire groove (2) comprises a first lead wire groove extending in a straight line, and a second lead wire groove connecting two adjacent first lead wire grooves; the blocking groove (5) is provided between the first lead wire groove and the second lead wire groove; and the second lead wire groove is provided with an arc corner at a corner thereof or the second lead wire groove is an arc-shaped groove.

5. The molded firework outer tube according to claim 4, characterized in that: The fire string groove (3) comprises a first fire string groove arranged in the first lead groove, and a second fire string groove arranged in the second lead groove; a plurality of the fire transmission hole groups are provided at the groove bottom of the first fire string groove; at least one fire transmission hole group is provided at the groove bottom of the second fire string groove; and the blocking groove (5) is provided between the first fire string groove and the second fire string groove.

6. The molded firework outer tube according to claim 1, characterized in that: A support frame (6) protruding downward is formed on the bottom edge of the outer cylinder body (1).

7. The molded firework outer tube according to claim 6, characterized in that: The support frame (6) is respectively provided with a wire inlet (7), a wire outlet (8) and a plurality of ventilation holes (9); the wire inlet (7) and the wire outlet (8) are respectively arranged at two ends of the lead-in groove (2); and the ventilation holes (9) are arranged on the side wall of the support frame (6) where the wire inlet (7) and the wire outlet (8) are not arranged.

8. The molded firework outer tube according to claim 7, characterized in that: The heights of the line inlet (7) and the line outlet (8) are both equal to the height of the support frame (6); and the height of the vent (9) is less than the height of the support frame (6).

9. The molded firework outer tube according to claim 5, characterized in that: Each of the groups of fire transmission holes located in the same fire string groove (3) is arranged at equal intervals.

10. The molded firework outer tube according to claim 3, characterized in that: The charge cavity (10) is a cylindrical cavity; the blocking groove (5) is a circular groove; and the fire transmission hole (4) is a circular hole.

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