A moisture-proof and explosion-proof modular firecracker packaging structure

Abstract

The utility model relates to a firecracker packaging technical field, especially a kind of modular firecracker packaging structure of moisture-proof and explosion-proof.It is as follows: a kind of modular firecracker packaging structure of moisture-proof and explosion-proof, including rear shell, front shell, plug block, ball and spring etc.;Rear shell and front shell are symmetrically distributed, and the rear shell front part is symmetrically linear array fusion with multiple plug blocks, and the rear part of front shell is symmetrically provided with the plug slot of corresponding plug block clamping cooperation, each plug slot is slidably connected with ball, and each ball is connected with spring between front shell.The utility model is inclined to guide setting by plug block and plug slot and the self-locking mechanism of ball and spring, realizes the quick plug-in and fixed between front shell and rear shell, ensures the sealing, moisture-proof and explosion-proof safety of modular firecracker packaging structure, and simultaneously, the disassembly process is simple and fast, and it is convenient to replace module or maintenance.

Description

Technical Field

[0001] This utility model relates to the field of firecracker packaging technology, and in particular to a moisture-proof and explosion-proof modular firecracker packaging structure. Background Technology

[0002] Firecracker encapsulation refers to the process of safely and efficiently sealing gunpowder and other necessary components into the firecracker shell, a crucial step in fireworks manufacturing. This process requires high precision and strict safety control to ensure the stability and safety of the final product. Modular firecracker encapsulation is an innovative design concept aimed at improving the safety, efficiency, and scalability of firecracker manufacturing through standardized components and flexible assembly methods. This structure designs each component of the firecracker (such as the shell, gunpowder pack, fuse, reinforcing materials, etc.) as an independent module, each with standardized specifications and interfaces, facilitating rapid assembly and replacement.

[0003] Gunpowder is extremely sensitive to humidity. If the packaging structure of firecrackers lacks moisture-proof features, moisture in the air will gradually penetrate into the gunpowder, causing it to absorb moisture and clump, thus affecting its combustion performance and, in severe cases, even causing it to completely fail. Under certain conditions (such as high temperature or compression), damp gunpowder may also spontaneously combust due to intensified chemical reactions, potentially leading to an accidental explosion. Furthermore, firecrackers without moisture-proof measures are highly susceptible to deterioration during storage due to changes in ambient humidity, significantly shortening their shelf life and increasing the complexity and maintenance costs of inventory management. During long-distance transportation or in harsh weather conditions, especially in high-temperature and high-humidity environments, firecrackers lacking moisture-proof design are more prone to problems such as gunpowder becoming damp and packaging damage, further increasing the risk of fire or explosion. Simultaneously, if the packaging structure lacks explosion-proof design, it is difficult to effectively protect the internal gunpowder when subjected to impacts, compression, or other external forces, increasing the possibility of premature detonation and seriously threatening safety during production, transportation, and use.

[0004] Therefore, it is necessary to design a moisture-proof and explosion-proof modular firecracker packaging structure to solve the above-mentioned technical problems. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this utility model provides a moisture-proof and explosion-proof modular firecracker packaging structure.

[0006] The technical solution is as follows: A moisture-proof and explosion-proof modular firecracker packaging structure includes a rear shell, a front shell, insert blocks, retaining balls, springs, a filling frame, retaining pieces, a rotating shaft, an eccentric chuck, a knob, and a pull rod. The rear shell and the front shell are symmetrically distributed. Multiple insert blocks are symmetrically and linearly arrayed and fixedly connected to the front part of the rear shell. The rear part of the front shell has symmetrically opened slots that engage with corresponding insert blocks. Each slot has a retaining ball slidably connected to it. Each retaining ball is connected to the front shell by a spring. Each insert block has a retaining hole. The rear shell and the front shell have internal side... Each of the two infill frames is rotatably connected to a filling frame. Multiple vent holes are arranged in a rectangular array on one side of each filling frame. A snap-fit ​​piece is symmetrically fixed to one side of the top of each filling frame. A rotating shaft is symmetrically rotatably connected to one side of the upper part of the rear and front housings. An eccentric chuck is fixedly connected to one side of each of the two rotating shafts on the same side. Each eccentric chuck engages with a corresponding snap-fit ​​piece. A knob is fixedly connected to one side of each rotating shaft. Two knobs on the same side are rotatably connected to the front and rear housings respectively. A pull rod is fixedly connected to one side of the upper part of each of the two filling frames.

[0007] Preferably, the front of each insert has a downward-sloping structure.

[0008] Preferably, it also includes hanging rings, with hanging rings fixedly connected to one side of the top of both the rear housing and the front housing. Both hanging rings have round holes that fit together.

[0009] Preferably, it also includes an explosion-proof iron frame, screw posts and fixing screws. An explosion-proof iron frame is placed on one side of both the front and rear housings. Screw posts are fixedly connected in a symmetrical linear array on the rear side of one of the explosion-proof iron frames. Each screw post is threadedly connected to a fixing screw at the rear. Each fixing screw protrudes from the explosion-proof iron frame on the other side.

[0010] Preferably, the device also includes an exhaust pipe and a filter membrane. Exhaust pipes are fixedly fitted onto both sides of the top of the front and rear housings, and a filter membrane is fixedly connected inside each exhaust pipe.

[0011] Preferably, it also includes a through pipe and a screw cap. The through pipe is snapped between the bottom of the front housing and the bottom of the rear housing. The lower part of the through pipe has a threaded groove, and the bottom of the through pipe is threadedly connected to the screw cap through the threaded groove.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The present invention achieves quick insertion and fixation between the front shell and the rear shell through the inclined guide setting of the plug and slot and the self-locking mechanism of the ball and spring, ensuring the sealing, moisture-proof and explosion-proof safety of the modular firecracker packaging structure. At the same time, the disassembly process is simple and quick, which facilitates the replacement of modules or maintenance, improves the practicality and production efficiency of the product. Moisture-proof and explosion-proof materials can be flexibly configured in the filling frame, which effectively improves the environmental adaptability and safety of the firecracker packaging structure and is suitable for various modular pyrotechnic packaging scenarios.

[0013] 2. This utility model constructs a robust protective layer by combining an explosion-proof iron frame with screw posts and fixing screws, thereby enhancing the overall structure's explosion resistance. It achieves modular assembly, facilitates maintenance and replacement, and effectively improves the buffering and explosion-proof performance of the firecracker packaging structure. It has the advantages of convenient operation, safety and reliability, and strong reusability, and is suitable for various pyrotechnic packaging scenarios.

[0014] 3. This utility model achieves efficient emission and preliminary purification of smoke during the setting off of firecrackers through the exhaust pipe and filter membrane structure set at the top of the front and rear shells. When the gunpowder burns and produces high-temperature and high-pressure gas and smoke, the internal pressure pushes the smoke out along the exhaust pipe. The filter membrane effectively intercepts solid particulate matter, reduces the direct release of harmful substances into the air, reduces environmental pollution, improves the safety and environmental performance of the firecracker packaging structure, and also improves the air quality after setting off the firecrackers, reducing the harm to people's health.

[0015] 4. This utility model achieves quick installation and disassembly through the cooperation of the through tube with the bottom slots of the front and rear housings, facilitating flexible maintenance and replacement of the lead wire channel; the smooth guiding structure of the inner wall of the through tube ensures smooth insertion of the lead wire, avoiding deviation or jamming, and improving ignition reliability; and the threaded connection between the screw cap and the threaded groove at the bottom of the through tube provides multiple protection functions such as dustproof, moistureproof and accidental contact prevention when not in use, improving the safety and ease of operation of the firecracker packaging structure, enhancing the reusability of modular components, and reducing usage costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the rear shell, front shell, and insert block of this utility model.

[0018] Figure 3 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 This is a three-dimensional structural diagram of the rear shell, front shell, and filling frame of this utility model.

[0020] Figure 5 This utility model Figure 4 Enlarged diagram of point B in the middle.

[0021] Figure 6 This is a three-dimensional structural diagram of the right shell, explosion-proof iron frame, and screw posts of this utility model.

[0022] Figure 7 This utility model Figure 6 Enlarged diagram of point C in the middle.

[0023] Figure 8 This utility model Figure 6 Enlarged diagram of point D in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1: Rear housing, 2: Front housing, 3: Insert block, 4: Hanging ring, 5: Ball catcher, 6: Spring, 7: Filler frame, 8: Vent hole, 9: Clip-on piece, 10: Rotary shaft, 11: Eccentric chuck, 12: Knob, 13: Pull rod, 14: Explosion-proof iron frame, 15: Screw post, 16: Fixing screw, 17: Exhaust pipe, 18: Filter membrane, 19: Through pipe, 20: Threaded groove, 21: Screw cap. Detailed Implementation

[0025] Example: A moisture-proof and explosion-proof modular firecracker packaging structure, such as... Figures 1-8 As shown, the device includes a rear housing 1, a front housing 2, insert blocks 3, hanging rings 4, retaining balls 5, springs 6, a filling frame 7, a snap-fit ​​piece 9, a rotating shaft 10, an eccentric chuck 11, a knob 12, and a pull rod 13. The rear housing 1 and the front housing 2 are symmetrically distributed front and back. Six insert blocks 3 are symmetrically arranged in a straight line array on the front side of the rear housing 1, with each insert block 3 having a downward-sloping front end. The rear side of the front housing 2 has symmetrically arranged slots that engage with the corresponding insert blocks 3. Hanging rings 4 are fused to the top of the rear housing 1 and the front housing 2 on their adjacent sides. Both hanging rings 4 have round holes that fit together. Each slot has a slidably connected retaining ball 5, and each retaining ball 5 is connected to the front housing 2 by a spring 6. Each insert block 3 has a retaining hole that is suitable for the diameter of the retaining ball 5. The rear housing 1 and the front housing 2 are rotatably connected to each other on opposite sides. The two filling frames 7 are arranged in a rectangular array with multiple ventilation holes 8 on opposite sides. The top of the two filling frames 7 are symmetrically welded with snap-fit ​​pieces 9 on opposite sides. The upper part of the rear housing 1 and the front housing 2 are symmetrically rotatably connected to each other on opposite sides. The two rotating shafts 10 on the same side of the front and rear are rotatably connected with eccentric chucks 11 on opposite sides. Each eccentric chuck 11 is engaged with the corresponding snap-fit ​​piece 9. Each rotating shaft 10 is rotatably connected with a knob 12 on opposite side of the corresponding eccentric chuck 11. The two knobs 12 on the same side of the front and rear are rotatably connected to the front housing 2 and the rear housing 1, respectively. The upper part of the two filling frames 7 is rotatably connected with pull rods 13 on opposite sides.

[0026] When connecting the rear housing 1 to the front housing 2, the operator pushes the rear housing 1 forward, causing the insert block 3 to be inserted along the slot direction. Because the front end of the insert block 3 is inclined downwards, it naturally compresses the retaining ball 5 downwards during insertion. As the insert block 3 penetrates deeper into the slot, its inclined surface continuously acts on the retaining ball 5, forcing it to retract into the slot and simultaneously compressing the spring 6 connected to it, temporarily disengaging it from the retaining hole position of the insert block 3. When the insert block 3 is fully inserted, i.e., when the rear housing 1 and front housing 2 are in contact, the retaining ball 5 is no longer subjected to the pressure of the inclined surface of the insert block 3. Under the restoring force of the spring 6, the retaining ball 5 quickly rebounds and locks into the retaining hole on the insert block 3, achieving a secure lock. For disassembly, the insert block 3 is pulled out, pressing down on the retaining ball 5, causing it to overcome the resistance of the spring 6 and move downwards, disengaging from the retaining hole on the insert block 3. With the retaining ball 5 disengaged, the rear housing 1 can be easily pulled out backwards, and the insert block 3 exits the slot, completing the connection between the front housing 2 and the rear housing 1. Separation: When it is necessary to place moisture-proof and explosion-proof filler into the filling frame 7, the operator first rotates the knob 12, causing the rotating shaft 10 to rotate synchronously, so that the eccentric chuck 11 disengages from the locking piece 9 it is engaged with. At this time, the filling frame 7 is in a free state. The operator holds the pull rod 13 and pulls it outward. With the leverage of the pull rod 13, the filling frame 7 is rotated outward around its rotation connection point to open, thus exposing the filling space. After the filling frame 7 is fully opened, the operator can put in filling materials with moisture-proof and energy-absorbing functions, such as silica gel desiccant or cushioning sponge, to improve the overall safety and stability of the firecracker packaging structure. After filling, the operator pushes the filling frame 7 back to the initial position along the original rotation path, so that it fits tightly against the corresponding front shell 2 and rear shell 1. As the filling frame 7 closes, the locking piece 9 on it re-enters the range of action of the eccentric chuck 11. At this time, the knob 12 is reversed, and the eccentric chuck 11 rotates and engages with the locking piece 9, achieving a firm lock. After the filling frame 7 is closed and snapped in place, the overall structure returns to a closed state, which not only enhances the sealing strength, but also achieves good moisture-proof, cushioning and explosion-proof effects through the filling material.

[0027] like Figure 1 , Figure 7 and Figure 6 As shown, it also includes an explosion-proof iron frame 14, screw posts 15 and fixing screws 16. An explosion-proof iron frame 14 is placed on the side of the front housing 2 and the rear housing 1 that are far apart from each other. Screw posts 15 are fused to the rear side of the explosion-proof iron frame 14 on the left and right sides in a symmetrical linear array. Each screw post 15 is threaded with a fixing screw 16 on the rear side. Each fixing screw 16 passes through the explosion-proof iron frame 14 located on the rear side.

[0028] Ensure that the front housing 2 and rear housing 1 are correctly assembled and that the internal filling frame 7 is closed and engaged. Inspect the explosion-proof iron frames 14 on both the front and rear sides to ensure that their surfaces are undamaged and that the screw posts 15 are intact. Align the explosion-proof iron frames 14 on the front housing 2 with those on the rear housing 1, ensuring that the screw posts 15 on the explosion-proof iron frames 14 of the front housing 2 can accurately pass through the corresponding holes on the explosion-proof iron frames 14 of the rear housing 1. Remove the fixing screws 16 and screw them one by one into the threaded holes on the back of the screw posts 15. Use a screwdriver or other tools to gradually tighten the fixing screws 16 until they are completely through the rear explosion-proof iron frames 14 and have sufficient tightening force. During the tightening process, be careful to maintain a uniform force to avoid deformation of the screw posts 15 or the explosion-proof iron frames 14 due to overtightening. After all the fixing screws 16 have been securely screwed in and tightened, the front and rear housings 1 and the explosion-proof iron frame 14 form an integral structure, providing an additional protective layer and enhancing the overall explosion-proof performance. If disassembly is required, prepare a suitable screwdriver or other tools suitable for removing the fixing screws 16. Use the screwdriver to rotate each fixing screw 16 counterclockwise to gradually loosen the threaded connection between the screw and the screw post 15. First, you can loosen it slightly by one turn to ensure that all screws are in an adjustable state, and then unscrew them completely one by one. Be careful during the disassembly process to prevent the screws from slipping and being lost. When all the fixing screws 16 have been completely unscrewed, separate the front and rear housings 1 and the explosion-proof iron frame 14. At this time, the explosion-proof iron frame 14 on the front housing 2 and the explosion-proof iron frame 14 on the rear housing 1 are no longer connected and can be removed separately.

[0029] like Figure 1 and Figure 7 As shown, it also includes an exhaust pipe 17 and a filter membrane 18. The exhaust pipe 17 is fixedly sleeved on the top left and right sides of the front housing 2 and the rear housing 1. Each exhaust pipe 17 has a filter membrane 18 glued inside it.

[0030] When a firecracker is ignited, the gunpowder burns rapidly, producing high-temperature, high-pressure gas and a large amount of smoke. This smoke contains solid particles, toxic gases, and other combustion products. During the firecracker's combustion, the internal pressure of the sealed front shell 2 and rear shell 1 rises rapidly, forming a relatively enclosed space. As the combustion reaction proceeds, the internal pressure gradually increases, requiring an outlet to release the pressure. As the internal pressure increases, the high-temperature, high-pressure smoke seeks a path to diffuse outward. The exhaust pipe 17 becomes the main channel for smoke discharge. The internal high pressure pushes the smoke towards the exhaust pipe 17 and discharges it into the external environment through the exhaust pipe 17. The filter membrane 18 can effectively intercept larger particles, such as incompletely burned gunpowder residue and carbon black, preventing them from being directly emitted into the air. Although the smoke treated by the filter membrane 18 still contains a certain amount of harmful components, it has been purified to a certain extent compared to the untreated original smoke. At this time, the discharged smoke has a lower temperature and the pressure has returned to normal levels, reducing potential hazards to the surrounding environment and personnel.

[0031] like Figure 1 and Figure 8 As shown, it also includes a through pipe 19 and a screw cap 21. The through pipe 19 is snapped between the bottom of the front housing 2 and the rear housing 1. The lower part of the through pipe 19 has a threaded groove 20. The bottom of the through pipe 19 is threadedly connected to the screw cap 21 through the threaded groove 20.

[0032] Insert the tube 19 from the bottom upwards into the reserved hole between the front housing 2 and the rear housing 1. Since the bottom of the front housing 2 and the rear housing 1 have matching slot structures, the tube 19 can be quickly locked in place by elastic deformation or sliding buckle after insertion. After installation, the tube 19 remains vertical, forming a safe channel running through it from top to bottom to accommodate the fuse. If the tube 19 needs to be replaced or maintained, simply pull it upwards to disassemble it. Before setting off the firecracker, insert the fuse of the firecracker from the top of the tube 19, allowing it to pass through the entire cavity of the tube 19 and extend to the bottom of the tube 19. The inner wall of the tube 19 is smooth. It also has a certain guiding function to prevent the fuse from deviating or getting stuck, ensuring accurate ignition position. The bottom of the tube 19 is threadedly connected to the cap 21 through the threaded groove 20. Under normal conditions, the cap 21 is in a closed state, which serves to prevent dust, moisture and accidental contact. When it is necessary to ignite the firecracker, the operator needs to rotate the cap 21 clockwise or counterclockwise to unscrew it from the bottom of the tube 19, exposing the end of the fuse. After the end of the fuse is exposed, it can be ignited with a ignition device to detonate the firecracker inside. After the firecracker is set off, if the tube 19 is not damaged, the cap 21 can be screwed back into the threaded groove 20 to seal the bottom of the tube 19 for the next use.

Claims

1. A moisture-proof and explosion-proof modular firecracker packaging structure, characterized in that, The assembly includes a rear housing (1), a front housing (2), insert blocks (3), ball bearings (5), springs (6), a filling frame (7), a snap-fit ​​piece (9), a rotating shaft (10), an eccentric chuck (11), a knob (12), and a pull rod (13). The rear housing (1) and the front housing (2) are symmetrically distributed. The front part of the rear housing (1) is symmetrically connected with multiple insert blocks (3) in a linear array. The rear part of the front housing (2) is symmetrically provided with slots that engage with the corresponding insert blocks (3). Each slot is slidably connected with a ball bearing (5). Each ball bearing (5) is connected to the front housing (2) with a spring (6). Each insert block (3) is provided with a snap-fit ​​hole. The rear housing (1) and the front housing (2) are rotatably connected on one side inside. There is a filling frame (7), and multiple ventilation holes (8) are provided in a rectangular array on one side of the two filling frames (7). The top side of the two filling frames (7) is symmetrically fixed with a snap-fit ​​piece (9). The upper side of the rear shell (1) and the front shell (2) are symmetrically rotatably connected with a rotating shaft (10). The two rotating shafts (10) on the same side are fixedly connected with an eccentric chuck (11). Each eccentric chuck (11) is engaged with the corresponding snap-fit ​​piece (9). The side of each rotating shaft (10) is fixedly connected with a knob (12). The two knobs (12) on the same side are rotatably connected to the front shell (2) and the rear shell (1) respectively. The upper side of the two filling frames (7) is fixedly connected with a pull rod (13).

2. The modular firecracker packaging structure for moisture and explosion protection according to claim 1, characterized in that, Each insert (3) has a downward-sloping front structure.

3. The moisture-proof and explosion-proof modular firecracker packaging structure according to claim 2, characterized in that, It also includes a hanging ring (4). The rear housing (1) and the front housing (2) are both fixedly connected to one side of the top. Both hanging rings (4) have round holes that match each other.

4. The modular firecracker packaging structure for moisture and explosion protection according to claim 3, characterized in that, It also includes an explosion-proof iron frame (14), screw posts (15) and fixing screws (16). An explosion-proof iron frame (14) is placed on one side of the front housing (2) and the rear housing (1). Screw posts (15) are fixedly connected in a symmetrical linear array on the rear side of one of the explosion-proof iron frames (14). Each screw post (15) is threaded with a fixing screw (16) at the rear. Each fixing screw (16) passes through the explosion-proof iron frame (14) on the other side.

5. The moisture-proof and explosion-proof modular firecracker packaging structure according to claim 4, characterized in that, It also includes an exhaust pipe (17) and a filter membrane (18). The exhaust pipe (17) is fixedly sleeved on both sides of the top of the front housing (2) and the rear housing (1). A filter membrane (18) is fixedly connected inside each exhaust pipe (17).

6. The moisture-proof and explosion-proof modular firecracker packaging structure according to claim 5, characterized in that, It also includes a tube (19) and a cap (21). The tube (19) is snapped between the bottom of the front housing (2) and the bottom of the rear housing (1). The tube (19) has a threaded groove (20) at the bottom. The cap (21) is threadedly connected to the bottom of the tube (19) through the threaded groove (20).

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