Firework assembly line

Abstract

This utility model relates to a fireworks assembly production line, comprising: a conveyor bus, and a firing gunpowder filling unit, a bottom paper pressing unit, an inner tube filling unit, and a top paper pressing unit arranged sequentially along the conveyor bus; the inner tube filling unit includes a material sorting device, a conveying device, a pushing device, a guiding device, and a pressing device; the material sorting device is used to remove the binding straps from the inner tube of the fireworks and push the inner tubes of the fireworks layer by layer into the conveying device; the conveying device is used to transport the inner tubes of the fireworks to the pushing device; the pushing device is located on one side of the conveying device and is used to push the inner tubes of the fireworks into the guiding device located on the other side of the conveying device; the pressing device is used to press the inner tubes of the fireworks in the guiding device into the outer tube of the fireworks. This application provides a fireworks assembly production line that can realize the automatic untying of the inner tubes of fireworks and the automatic assembly of the inner and outer tubes of fireworks, thereby reducing manual intervention and improving production safety.

Description

Technical Field

[0001] This utility model belongs to the field of fireworks production technology, and in particular relates to a fireworks assembly line. Background Technology

[0002] With the mechanization and large-scale development of the fireworks industry, various automated equipment has been gradually introduced into the production process to replace some traditional manual operations. However, in the actual application of fireworks assembly lines, there are still many manual labor-intensive processes, especially in the filling of fireworks inner tubes. Current processes typically involve stacking several fireworks inner tubes in layers and then securing them into a disc shape using cable ties (for example, stacking the fireworks inner tubes in layers into a regular hexagonal shape using cable ties, and then binding them together to form a hexagonal fireworks inner tube disc). During fireworks assembly, workers need to manually remove the cable ties and then take out each fireworks inner tube one by one for filling.

[0003] The existing methods have the following problems: First, manual removal of cable ties and material handling are inefficient, and the operation can easily cause squeezing or damage to the inner tube of the fireworks, affecting product quality. Second, it is difficult to maintain consistency in the movements when manually handling the inner tube of fireworks, which can easily lead to deviations in the posture of the inner tube or incomplete filling, resulting in unstable quality in subsequent processes such as paper pressing and explosive loading. Third, the manual operation is physically demanding, and the working environment is monotonous and repetitive, which not only affects production efficiency but also easily causes operator fatigue. In addition, in the fireworks assembly line, since fireworks are flammable and explosive, direct manual involvement in filling can also bring potential safety risks.

[0004] Therefore, how to provide a production line that can automatically untie the inner tube of fireworks and automatically assemble the inner and outer tubes of fireworks, so as to reduce manual intervention, reduce labor intensity, improve production consistency, and further ensure the safety of the production process, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] To solve at least one of the above-mentioned technical problems, this utility model provides a fireworks assembly line, comprising: a conveyor bus, and a firing gunpowder filling unit, a bottom paper pressing unit, an inner cylinder filling unit, and a top paper pressing unit arranged sequentially along the conveyor bus; the inner cylinder filling unit includes a material sorting device, a conveying device, a pushing device, a guiding device, and a pressing device; the material sorting device is used to remove the binding straps from the inner cylinder of the fireworks and push the inner cylinder of the fireworks layer by layer into the conveying device; the conveying device is used to transport the inner cylinder of the fireworks to the pushing device; the pushing device is located on one side of the conveying device and is used to push the inner cylinder of the fireworks into the guiding device located on the other side of the conveying device; the pressing device is used to press the inner cylinder of the fireworks in the guiding device into the outer cylinder of the fireworks.

[0006] Furthermore, the material handling device includes: a conveying component, a first pushing component, a clamping component, a lifting component, and a second pushing component;

[0007] A conveying assembly for conveying the inner tube of a firework to a first pushing assembly includes a horizontal conveyor line and feeding clamps spaced apart on the horizontal conveyor line, the feeding clamps having a first cavity that matches the shape of the inner tube of the firework.

[0008] A first pushing component is disposed on the first side of the conveying component, and the first pushing component is provided with a first pusher corresponding to the inner tube of the firework.

[0009] A clamping assembly is disposed on the second side of the conveying assembly and between the lifting assembly. The clamping assembly removes the cable ties on the inner tube of the firework under the push of the first pusher, and then conveys the inner tube of the firework after the cable ties have been removed to the lifting assembly.

[0010] The lifting assembly is equipped with a fifth chamber to accommodate the inner tube of the fireworks, and lifts the inner tube of the fireworks to a predetermined position;

[0011] The second pushing component is positioned above the first pushing component and has a second pusher head at the telescopic end, used to push out the inner tube of the fireworks component layer by layer.

[0012] Furthermore, the clamping assembly includes: a first clamping member and a second clamping member disposed on both sides of the clamping assembly;

[0013] The first clamping member and the second clamping member are symmetrically arranged, and both the first clamping member and the second clamping member include an upper clamping block, a lower clamping block and a clamping drive member;

[0014] The upper clamping block and the lower clamping block are arranged symmetrically at a preset angle;

[0015] The clamping drive unit drives the upper and lower clamping blocks to clamp the inner tube of the firework.

[0016] Furthermore, the lifting components include: a first side plate, a second side plate, and a second clamp;

[0017] The first side plate is disposed between the clamping assembly and the first side of the second clamp, and the bottom is provided with a second cavity adapted to the inner tube of the firework, and the top is provided with a third cavity adapted to the second pusher.

[0018] The second side plate is located on the second side of the second clamp, with its bottom abutting against the second clamp, and a fourth cavity corresponding to the third cavity is provided at the upper end of the second side plate.

[0019] The second clamp is vertically adjustable and positioned between the first and second side plates, and a fifth cavity adapted to the inner tube of the firework is provided on the second clamp.

[0020] Furthermore, the conveying device includes: a first conveyor line that receives and transports the inner tube of the fireworks pushed layer by layer by the second pushing component;

[0021] The second conveyor line is located below the first conveyor line and includes spaced material distribution troughs for receiving the inner tubes of fireworks and conveying them to the pushing device.

[0022] The flow guiding component has one end connected to the end of the first conveyor line and the other end inserted into the buffer component, which is used to guide the inner tube of the fireworks into the buffer component.

[0023] A buffer component, located in the transition area between the first and second conveyor lines and disposed on the second conveyor line, is used to guide the inner tube of the fireworks from the first conveyor line into the material distribution trough of the second conveyor line.

[0024] Furthermore, the feeding device is provided with third pushers at intervals along the conveying direction of the second conveyor line, and the third pushers correspond to the feeding trough;

[0025] The guidance system includes several guidance channels and relay components;

[0026] The guide channel corresponds to the corresponding third pusher; each guide channel includes: a horizontal guide section, an arc transition section and a vertical guide section connected end to end;

[0027] The transfer component is movably installed below the guide channel; the transfer component is equipped with a transfer channel, and each transfer channel corresponds to the corresponding guide channel and the outer tube of the firework.

[0028] The pressing device is used to press the inner tube of the fireworks from the guide channel into the transfer channel, and press the inner tube of the fireworks in the transfer channel into the outer tube of the fireworks.

[0029] Furthermore, the fireworks assembly line also includes an inner cylinder feeding unit;

[0030] The inner cylinder feeding unit and the inner cylinder filling unit are separated by a first explosion-proof wall;

[0031] The inner cylinder feeding unit is used to feed the inner cylinder into the inner cylinder filling unit through the feeding port on the first explosion-proof wall.

[0032] Furthermore, the first blast-proof wall is H-shaped, comprising: transverse walls and side walls;

[0033] The transverse walls are set between the side walls and are equipped with feeding ports corresponding to the inner cylinder filling units;

[0034] The side walls extend vertically along the transverse walls and combine with the transverse walls to form a "U"-shaped space located below the transverse walls and a "U"-shaped space located above the transverse walls.

[0035] The inner cylinder feeding unit is located in the U-shaped space below the transverse wall, and the inner cylinder filling unit is located in the U-shaped space above the transverse wall.

[0036] Furthermore, the fireworks assembly line also includes: a second explosion-proof wall, a third explosion-proof wall, and a fourth explosion-proof wall;

[0037] The second explosion-proof wall is set up around the firing and loading unit;

[0038] The third explosion-proof wall, together with the first and second explosion-proof walls, is set up around the bottom paper unit;

[0039] The fourth explosion-proof wall and the first explosion-proof wall are together enclosed around the paper pressing unit;

[0040] The first, second, third, and fourth explosion-proof walls work together to form a "U"-shaped explosion-proof surface on the side of the inner cylinder filling unit, the nitrate-emitting filling unit, the bottom paper pressing unit, and the top paper pressing unit near the transmission bus.

[0041] Furthermore, the fireworks assembly line also includes: a first visual inspection device, a second visual inspection device, and a third visual inspection device;

[0042] The first visual inspection device is located between the nitric acid filling unit and the bottom paper pressing unit;

[0043] The second visual inspection device is installed between the bottom paper pressing unit and the inner cylinder filling unit;

[0044] The third visual inspection device is located behind the paper pressing unit;

[0045] The first visual inspection device, the second visual inspection device, and the third visual inspection device all include: a visual inspection component and a separation conveyor line;

[0046] The separation conveyor line separates defective products based on the visual inspection results.

[0047] The beneficial effects of this application are as follows:

[0048] This embodiment presents a fireworks assembly line. In operation, the launching gunpowder filling unit quantitatively fills the launching gunpowder to the bottom of the fireworks outer tube to ensure stable launching power upon ignition. The bottom paper pressing unit presses the bottom paper over the launching gunpowder to isolate, seal, and stabilize the propellant layer, preventing loosening or leakage of the launching gunpowder in subsequent operations. The inner tube filling unit accurately inserts the processed fireworks inner tube into the fireworks outer tube sequentially. After completing the inner tube filling, the top paper pressing unit presses the top paper at the opening of the fireworks outer tube to complete the final sealing. These units are sequentially arranged along a conveyor bus, which automatically transports and positions components such as the fireworks outer tube. This not only achieves sequential connection and material transfer between the units but also avoids the instability and inefficiency caused by manual handling. Through the coordinated operation of the conveyor bus and the aforementioned units, the fireworks assembly line can continuously complete the entire assembly process from launching gunpowder filling, bottom paper compaction, and fireworks inner tube assembly, thereby significantly improving automation, assembly efficiency, and product consistency.

[0049] The inner cylinder filling unit's material handling device processes the firework inner cylinder cake, removing the binding straps and pushing the inner cylinders layer by layer to the conveying device, achieving layer-by-layer ejection and conveying of the firework inner cylinders. Subsequently, the conveying device transports the separated firework inner cylinders to the pushing device. When the firework inner cylinder reaches the pushing device, the pushing device pushes the firework inner cylinder from one side of the conveying device, causing it to enter the guiding device located on the other side. The guiding device guides and corrects the posture of the firework inner cylinder, stably guiding it to the predetermined docking position. Finally, the pressing device moves from top to bottom, accurately pressing the firework inner cylinder from the guiding device into the firework outer cylinder, thus completing the final assembly of the firework. Through the above process, an automated process is achieved for the firework inner cylinder, from removing binding straps, layer-by-layer pushing, conveying and positioning, to guiding and pressing into the outer cylinder, avoiding the low efficiency, high labor intensity, and problems such as unstable posture and inaccurate assembly of the firework inner cylinder in manual operation. The feeding device automatically unties and separates the inner tube cakes layer by layer, ensuring the continuity and orderliness of inner tube feeding. The cooperation between the pushing device and the guiding device prevents the inner tube from tipping over and misaligning during transfer, improving assembly accuracy. The pressing device ensures the coaxial pressing of the inner and outer tubes, improving overall assembly quality and production consistency. Therefore, this production line not only improves the automation level and production efficiency of fireworks assembly operations but also significantly reduces manual intervention and safety risks. In summary, this application provides a fireworks assembly production line that can automatically untie the inner tube cakes and automatically assemble the inner and outer tubes of fireworks, reducing manual intervention, lowering labor intensity, improving production consistency, and further ensuring the safety of the production process—a technical problem urgently needing to be solved in this field. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. In the drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0051] Figure 1 This is a schematic diagram of one embodiment of a fireworks assembly line according to the present invention;

[0052] Figure 2 This is a top view schematic diagram of an embodiment of the inner cylinder filling unit of a fireworks assembly production line according to the present invention;

[0053] Figure 3 This is a schematic diagram of one embodiment of the fireworks inner tube cake of this utility model;

[0054] Figure 4 This is a schematic diagram of one embodiment of a material handling device for a fireworks assembly line according to the present invention;

[0055] Figure 5 This is a schematic diagram of one embodiment of a clamping component in a fireworks assembly production line according to the present invention;

[0056] Figure 6 This is a schematic diagram of an embodiment of a lifting component and a second pushing component of a fireworks assembly line according to the present invention;

[0057] Figure 7 This is a schematic diagram of an embodiment of the first side plate of a fireworks assembly line according to the present invention;

[0058] Figure 8 This is a schematic diagram of an embodiment of the second side plate of a fireworks assembly line according to the present invention;

[0059] Figure 9 This is a schematic diagram of an embodiment of the second clamp of a fireworks assembly line according to the present invention;

[0060] Figure 10 This is a schematic diagram of one embodiment of a conveying device in a fireworks assembly line according to the present invention;

[0061] Figure 11 This is a partial structural schematic diagram of an embodiment of the second conveyor line of a fireworks assembly production line according to the present invention.

[0062] Figure 12 This is a partial structural schematic diagram of a conveying device in a fireworks assembly line according to an embodiment of the present invention.

[0063] Figure 13 This is a partial structural schematic diagram of an embodiment of the inner cylinder filling unit of a fireworks assembly production line according to the present invention;

[0064] Figure 14 This is a partial structural schematic diagram of an embodiment of the guiding device and pressing device of a fireworks assembly line according to the present invention;

[0065] Figure 15 This is a partial structural schematic diagram of a guide channel in a fireworks assembly line according to an embodiment of the present invention.

[0066] Figure 16 This is a schematic diagram of an embodiment of a transfer component and a second pressing head in a fireworks assembly line according to the present invention;

[0067] Figure 17 This is a schematic diagram of one embodiment of the first explosion-proof wall of a fireworks assembly line according to the present invention. Detailed Implementation

[0068] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0069] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0070] It should also be noted that if the embodiments of this utility model involve directional indicators, such as up, down, left, right, front, back, etc., these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," "S1," "S2," "step one," "step two," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated or the execution order of the method. Those skilled in the art will understand that anything that does not violate the essential points of the utility model within the scope of its inventive concept should be included within the protection scope of this utility model.

[0071] This utility model provides a fireworks assembly line, for reference... Figures 1-3 The system includes: a conveyor bus 1, and a firing nitrous oxide filling unit 2, a bottom paper pressing unit 3, an inner cylinder filling unit 4, and a top paper pressing unit 5 arranged sequentially along the conveyor bus 1; the inner cylinder filling unit 4 includes a material handling device 41, a conveying device 42, a pushing device 43, a guiding device 44, and a pressing device 45; the material handling device 41 is used to remove the binding strap 61 from the inner cylinder cake 6 of the firework and push the inner cylinder 62 of the firework layer by layer into the conveying device 42; the conveying device 42 is used to transport the inner cylinder of the firework to the pushing device 43; the pushing device 43 is located on one side of the conveying device 42 and is used to push the inner cylinder of the firework 62 into the guiding device 44 located on the other side of the conveying device 42; the pressing device 45 is used to press the inner cylinder of the firework 62 in the guiding device 44 into the outer cylinder of the firework.

[0072] This embodiment presents a fireworks assembly line. In operation, the launching gunpowder filling unit quantitatively fills the launching gunpowder to the bottom of the fireworks outer tube to ensure stable launching power upon ignition. The bottom paper pressing unit presses the bottom paper over the launching gunpowder to isolate, seal, and stabilize the propellant layer, preventing loosening or leakage of the launching gunpowder in subsequent operations. The inner tube filling unit accurately inserts the processed fireworks inner tube into the fireworks outer tube sequentially. After completing the inner tube filling, the top paper pressing unit presses the top paper at the opening of the fireworks outer tube to complete the final sealing. These units are sequentially arranged along a conveyor bus, which automatically transports and positions components such as the fireworks outer tube. This not only achieves sequential connection and material transfer between the units but also avoids the instability and inefficiency caused by manual handling. Through the coordinated operation of the conveyor bus and the aforementioned units, the production line can continuously complete the assembly process from launching gunpowder filling, bottom paper compaction, and fireworks inner tube assembly, thereby significantly improving automation, assembly efficiency, and product consistency.

[0073] The inner cylinder filling unit's material handling device processes the firework inner cylinder cake, removing the binding straps and pushing the inner cylinders layer by layer to the conveying device, achieving layer-by-layer ejection and conveying of the firework inner cylinders. Subsequently, the conveying device transports the separated firework inner cylinders to the pushing device. When the firework inner cylinder reaches the pushing device, the pushing device pushes the firework inner cylinder from one side of the conveying device, causing it to enter the guiding device located on the other side. The guiding device guides and corrects the posture of the firework inner cylinder, stably guiding it to the predetermined docking position. Finally, the pressing device moves from top to bottom, accurately pressing the firework inner cylinder from the guiding device into the firework outer cylinder, thus completing the final assembly of the firework. Through the above process, an automated process is achieved for the firework inner cylinder, from removing binding straps, layer-by-layer pushing, conveying and positioning, to guiding and pressing into the outer cylinder, avoiding the low efficiency, high labor intensity, and problems such as unstable posture and inaccurate assembly of the firework inner cylinder in manual operation. The feeding device automatically unties and separates the inner tube cakes layer by layer, ensuring the continuity and orderliness of inner tube feeding. The cooperation between the pushing device and the guiding device prevents the inner tube from tipping over and misaligning during transfer, improving assembly accuracy. The pressing device ensures the coaxial pressing of the inner and outer tubes, improving overall assembly quality and production consistency. Therefore, this production line not only improves the automation level and production efficiency of fireworks assembly operations but also significantly reduces manual intervention and safety risks. In summary, this application provides a fireworks assembly production line that can automatically untie the inner tube cakes and automatically assemble the inner and outer tubes of fireworks, reducing manual intervention, lowering labor intensity, improving production consistency, and further ensuring the safety of the production process—a technical problem urgently needing to be solved in this field.

[0074] More preferably, refer to Figure 1 The fireworks assembly line also includes: a fireworks outer tube feeding unit 1a and an automatic unloading unit 1b;

[0075] The fireworks outer tube feeding unit 1a is located at the front end of the launching gunpowder filling unit 2;

[0076] The automatic feeding unit 1b is located at the rear end of the paper pressing unit 5.

[0077] In this embodiment, the fireworks outer tube feeding unit is used to transport the fireworks outer tube to the conveyor bus; the automatic unloading unit unloads the finished fireworks from the conveyor bus and into subsequent processes. Adding the fireworks outer tube feeding unit and the automatic unloading unit to the fireworks assembly line enables the entire fireworks assembly process to be completed, from outer tube feeding, firing gunpowder filling, bottom paper compaction, inner tube assembly, top paper sealing to finished fireworks unloading, further improving the automation level of fireworks assembly. Preferably, [reference needed]. Figures 2-9The material handling device 41 includes: a conveying component 411, a first pushing component 412, a clamping component 413, a lifting component 414, and a second pushing component 415;

[0078] The conveying assembly 411 is used to convey the inner tube cake 6 of the firework to the first pushing assembly 412. It includes a horizontal conveyor line 4111 and feeding clamps 4112 spaced on the horizontal conveyor line 4111. The feeding clamps 4112 have a first cavity 4113 that matches the shape of the inner tube cake 6 of the firework.

[0079] The first pushing component 412 is disposed on the first side of the conveying component 411, and the first pushing component 412 is provided with a first pusher 4121 corresponding to the inner tube cake 6 of the firework.

[0080] A clamping assembly 413 is disposed between the second side of the conveying assembly 411 and the lifting assembly 414. The clamping assembly 413 removes the cable tie 61 on the inner tube of the firework 62 under the push of the first pusher 4121, and conveys the inner tube of the firework 62 after the cable tie 61 is removed to the lifting assembly 414.

[0081] The lifting component 414 is provided with a fifth cavity 41431 for accommodating the inner tube of the fireworks 62, and lifts the inner tube of the fireworks 62 to a predetermined position;

[0082] The second pushing component 415 is disposed above the first pushing component 412, and a second pusher 4151 is provided at the telescopic end for pushing out the inner tube 62 of the fireworks in the lifting component 414 layer by layer.

[0083] In this embodiment, a feeding device is used to bundle the inner tube cakes of fireworks (see reference). Figure 3The fireworks inner tube cake 6 includes: cable ties 61 and layered stacked fireworks inner tubes 62 bundled with cable ties 61, which are pushed out layer by layer to complete the material handling of the fireworks inner tube. In use: The horizontal conveyor line and feeding clamp of the conveying component receive and transport the inner tube of the fireworks in parallel. The inner tube is stably contained in the first cavity, ensuring its stable posture and neat stacking during the conveying process, providing accurate positioning for subsequent pushing and clamping. The first pushing component is equipped with a first pusher head corresponding to the inner tube of the fireworks. After the inner tube is transported to the designated position, it pushes the inner tube to the clamping component. During the pushing process, the clamping component reliably clamps the inner tube and the cable ties binding it, preventing the inner tube from shifting. Then, the first pushing component continues to push the inner tube as a whole to the lifting component, while the cable ties binding the inner tube are completely hooked onto the first pusher head, completing the removal of the cable ties. The lifting component lifts the inner tube with the cable ties removed to the predetermined height. After the inner tube is lifted into place, the second pushing component pushes out the inner tube layer by layer, allowing the inner tube to be layered and distributed sequentially. Compared with existing technologies, this embodiment directly pushes out the bundled firework inner tube cakes layer by layer to complete the feeding and sorting. This not only boasts a high degree of automation but also eliminates the need for manual intervention throughout the entire feeding process, effectively reducing the risk of safety accidents caused by misoperation, accidental contact, or electrostatic friction, thus significantly improving the safety and reliability of the production process. Furthermore, the firework inner tube cakes are transported via a horizontal conveyor line and clamped and positioned by a gripping assembly, replacing the traditional robotic arm gripping method. Compared to robotic arms, this technical solution eliminates the need for complex programming and debugging, avoiding the problems of high manufacturing and maintenance costs, easy loss of zero point after power failure, and cumbersome operation associated with robotic arms. This results in a simplified structure, stable operation, and lower cost for the feeding process.

[0084] Preferred, Reference Figure 5 The clamping assembly 413 includes: a first clamping member 4131 and a second clamping member 4132 disposed on both sides of the clamping assembly 413;

[0085] The first clamping member 4131 and the second clamping member 4132 are symmetrically arranged, and both the first clamping member 4131 and the second clamping member 4132 include an upper clamping block 41311, a lower clamping block 41312 and a clamping drive member 41313.

[0086] The upper clamping block 41311 and the lower clamping block 41312 are arranged symmetrically at a preset included angle;

[0087] The clamping drive unit 41313 drives the upper clamping block 41311 and the lower clamping block 41312 to clamp the inner tube cake 6 of the fireworks.

[0088] In this embodiment, the first and second clamping members on both sides of the clamping assembly are symmetrically arranged, and the upper and lower clamping blocks of each clamping member are arranged at a preset angle, forming an angled clamping method under the drive of the clamping drive member. On the one hand, the first and second clamping members have the same structure, which makes the force on the inner tube of the firework uniform during the clamping process, avoiding the displacement and damage that may be caused by unilateral clamping; on the other hand, the clamping blocks and the lower clamping block are arranged symmetrically at a preset angle, which effectively avoids the slippage or damage caused by excessive force at a single point that is easy to occur in the vertical clamping method; it can also more effectively clamp the tie on the outer periphery of the inner tube of the firework, so that the tie can be removed more effectively.

[0089] Example, reference Figure 5 The preset angle between the upper clamping block 41311 and the lower clamping block 41312 is 120° to accommodate the fireworks inner tube 62, which is stacked in a regular hexagonal layer and bound with cable ties 61 to form the fireworks inner tube cake 6.

[0090] Preferred, Reference Figures 6-9 The lifting assembly 414 includes: a first side plate 4141, a second side plate 4142, and a second clamp 4143;

[0091] The first side plate 4141 is disposed between the clamping assembly and the first side of the second clamp 4143, and the bottom is provided with a second cavity 4141a adapted to the inner tube cake 6 of the fireworks, and the top is provided with a third cavity 4141b adapted to the second pusher 4151.

[0092] The second side plate 4142 is disposed on the second side of the second clamp 4143, and its bottom abuts against the second clamp 4143. The upper end of the second side plate 4142 is provided with a fourth cavity 4142a corresponding to the third cavity 4141b.

[0093] The second clamp 4143 is vertically adjustable between the first side plate 4141 and the second side plate 4142, and the second clamp 4143 is provided with a fifth cavity 41431 that is adapted to the inner tube of the firework 6.

[0094] In this embodiment, when the first pushing component pushes the firework inner tube cake held by the clamping component, the cable tie is attached to the first pushing head, and the entire firework inner tube passes through the second cavity of the first side plate and enters the fifth cavity of the second clamp. The third side plate abuts against the second clamp, effectively preventing the firework inner tube from being pushed out or displaced, ensuring lateral stability. Subsequently, the second clamp drives the firework inner tube to rise to the third cavity of the first side plate, and the second pushing head of the second pushing component passes through the third cavity and works with the second clamp to push the firework inner tube out of the fourth cavity row by row, realizing the layer-by-layer feeding of the firework inner tube. This design, through multi-cavity guidance, stable clamping, and collaborative pushing, achieves stable, continuous, and precise layer-by-layer feeding of the firework inner tube, further improving the automation level, safety, and reliability of the feeding process, while effectively preventing the firework inner tube from tilting, shaking, or falling.

[0095] More preferably, refer to Figure 6 and Figure 9 The lateral width of the second pusher 4151 is greater than the maximum lateral width of the fifth cavity 41431;

[0096] On both sides of the fifth cavity 41431, push grooves 41432 adapted to the second push head 4151 are arranged sequentially from bottom to top;

[0097] The vertical width of the push slot 41432 is smaller than the diameter of the inner tube 62 of the fireworks, and the spacing between adjacent push slots 41432 is equal to the diameter of the inner tube 62 of the fireworks.

[0098] In this embodiment, the lateral width of the second pusher is greater than the maximum width of the fifth cavity. It works in conjunction with the pusher slots that are spaced apart from bottom to top to ensure that the second pusher can fully cover, evenly and push out the stacked fireworks inner tubes layer by layer from top to bottom. At the same time, the vertical width of the pusher slots is smaller than the diameter of the fireworks inner tubes, and the slot spacing is equal to the diameter of the fireworks inner tubes. This can effectively limit and guide the fireworks inner tubes, preventing them from tilting, misaligning or being missed. This achieves the layer-by-layer, precise and stable pushing out of the fireworks inner tubes, improving the continuity, reliability and safety of the feeding process.

[0099] Preferred, Reference Figures 10-12 The conveying device 42 includes: a first conveyor line 421, which receives and conveys the inner tube 62 of the fireworks pushed layer by layer by the second pushing component 415;

[0100] The second conveyor line 422 is located below the first conveyor line 421 and includes a material distribution trough 4221 spaced apart for receiving the inner tube of the fireworks 62 and conveying it to the material pushing device 43.

[0101] The flow guiding component 424 has one end connected to the end of the first conveyor line 421 and the other end inserted into the buffer component 423, which is used to guide the inner tube of the firework 62 into the buffer component 423.

[0102] The buffer component 423 is located in the transition area between the first conveyor line 421 and the second conveyor line 422, and is disposed on the second conveyor line 422, for guiding the inner tube of the fireworks from the first conveyor line 421 into the material distribution trough 4221 of the second conveyor line 422.

[0103] In this embodiment, a buffer component is set between the first and second conveyor lines. This allows the inner tubes of the fireworks to be buffered, guided, and limited as they move from the end of the first conveyor line (discharge end) to the beginning of the second conveyor line (inlet end), preventing instability and excessive impact from direct drops. The buffer component can temporarily store multiple inner tubes during accumulation and release them one by one after alignment with the material distribution slots on the second conveyor line, achieving single-piece material distribution. A flow guide component, with one end connected to the end of the first conveyor line and the other end extending into the buffer component, guides the inner tubes of the fireworks into the buffer component. The buffer component, through the flow guide component, guides the inner tubes of the fireworks one by one into the spaced-apart material distribution slots on the second conveyor line, ensuring that the inner tubes accurately enter their corresponding distribution positions, thereby improving the uniformity and reliability of material distribution. Because the buffer component is located in the transition area, it also acts as a buffer, slowing down, orienting, and releasing the inner tubes one by one during movement, effectively preventing accumulation and jamming. The overall structure not only improves the continuity and automation of the conveying and distributing process, but also reduces the need for manual intervention and enhances the safety and stability of the production line operation.

[0104] More preferably, refer to Figure 12 The flow guiding component 424 includes: a guiding section 4241 and an inclined section 4242;

[0105] Guide section 4241 is used to guide the fireworks inner tube 62;

[0106] The inclined section 4242 is positioned above the second conveyor line 421, with its end extending into the buffer assembly 423 and close to the top of the material distribution trough 4221 of the second conveyor line 422.

[0107] In this embodiment, the guide section is used to initially guide the inner tubes of fireworks conveyed on the first conveyor line, ensuring their relatively stable posture when entering the inclined section. The inclined section is located above the second conveyor line, with its end extending into the buffer assembly and close to the top of the distribution trough of the second conveyor line. After entering the inclined section via the guide section, the inner tubes of fireworks change from linear conveying motion to sliding motion along the inclined surface under the guidance of the inclined section, achieving a gradual reduction in speed and a gradual adjustment of posture. When sliding to the end of the inclined section, the inner tubes of fireworks fall directly into the buffer assembly and are finally accurately guided into the distribution trough of the second conveyor line. Guided by the flow guiding assembly, the inner tubes of fireworks slide into the distribution trough of the second conveyor line. The sliding process has controlled speed and direction. The inner tubes of fireworks can be released one by one in the buffer assembly, forming a continuous and controllable transition process, making the three links of conveying, buffering, and distribution closely connected, significantly improving the distribution efficiency and automation level.

[0108] Example, reference Figure 12 The inclined section 4242 can be made of a sloping plate structure, so that the inner tube 62 of the firework slides and rolls into the material distribution trough 4221 under the action of gravity; the inclined section 4242 can also be made of other arc-shaped or curved structures to achieve a better rolling effect.

[0109] More preferably, refer to Figure 12 The inclined section 4242 and the guide section 4241 are rotatably connected, thereby adjusting the tilt angle of the inclined section 4242.

[0110] Preferred, Reference Figures 13-16 The feeding device 43 is provided with a third pusher 431 at intervals along the conveying direction of the second conveyor line 422, and the third pusher 431 corresponds to the material distribution trough 4221.

[0111] The guiding device 44 includes several guiding channels 441 and a transfer component 442. The guiding channels 441 correspond to the corresponding third push head 431. Each guiding channel 441 includes: a horizontal guiding section 4411, an arc-shaped transition section 4412 and a vertical guiding section 4413 connected end to end.

[0112] The transfer component 442 is movably disposed below the guide channel 441. The transfer component 442 is provided with a transfer channel 442a, and each transfer channel 442a corresponds to the corresponding guide channel 441 and the outer tube of the firework.

[0113] The pressing device 45 is used to press the inner firework tube 62 from the guide channel 441 into the transfer channel 442a, and then press the inner firework tube 62 in the transfer channel 442a into the outer firework tube. In this embodiment, the pushing device has third pushers spaced apart along the conveying direction of the second conveyor line, corresponding to the material distribution trough, so that the inner firework tube can be accurately pushed from the material distribution trough to the guide device, ensuring the orderliness of the feeding process. The guide channel of the guide device adopts a three-section structure of horizontal guide section, arc transition section and vertical guide section, so that the inner firework tube can achieve a smooth transition from horizontal to vertical during the conveying process. Through the row-by-row pushing of the third pushers of the pushing component, in coordination with the row-by-row movement of the transfer component, the inner firework tube accurately falls into the transfer channel corresponding to the outer firework tube. After the transfer assembly completes the fireworks loading, it moves above the outer cylinder of the fireworks. The pressing head of the pressing device presses down as a whole, reliably pressing the inner cylinder of the fireworks into the outer cylinder through a downward pressing force. This not only ensures the coaxiality and assembly firmness of the inner and outer cylinders, but also avoids the problems of misalignment, jamming, and low efficiency caused by manual operation. This structure realizes an automated and precise operation process for the inner cylinder of the fireworks, from conveying, pushing, guiding, positioning to pressing into the outer cylinder, further improving the efficiency and consistency of final assembly production.

[0114] More preferably, refer to Figures 13-16 The pressing device 45 includes: a first pressing head 451 and a second pressing head 452;

[0115] The first pressing head 451 is positioned above the guide channel 441;

[0116] The second pressing head 452 is positioned above the transfer component 442;

[0117] The transfer component 442 is movably positioned between the lower part of the guide channel 441 and the upper part of the fireworks outer tube.

[0118] In this embodiment, the first pressing head is located above the guide channel and can press the inner tubes of the fireworks into the transfer channel of the transfer component row by row through the guide channel; after the inner tubes of the fireworks in the transfer channel are filled, it moves to the top of the outer tube of the fireworks, and the second pressing head presses the inner tube of the fireworks into the outer tube of the fireworks as a whole, automatically completing the filling of the inner tube of the fireworks.

[0119] Preferred, Reference Figure 1 and Figure 17 The fireworks assembly line also includes an inner cylinder feeding unit 7;

[0120] The inner cylinder feeding unit 7 and the inner cylinder filling unit 4 are separated by the first explosion-proof wall 71;

[0121] The inner cylinder feeding unit 7 is used to feed the fireworks inner cylinder cake 6 into the inner cylinder filling unit 4 through the feeding port 71a on the first explosion-proof wall 71.

[0122] In this embodiment, a feeding unit is added to the fireworks assembly line, and a first explosion-proof wall is installed between the inner cylinder feeding unit and the inner cylinder filling unit. The inner cylinder is fed into the inner cylinder filling unit through a feeding port on the explosion-proof wall. This structure spatially isolates the feeding and filling operations, effectively reducing the loading of the fireworks inner cylinder and separating the feeding and filling areas. For example, the inner cylinder feeding unit is fed by a robotic arm or other mechanical conveyor or manually. Taking manual feeding as an example, the operator at the inner cylinder feeding unit feeds the fireworks inner cylinder cake into the inner cylinder filling unit through the feeding port, greatly reducing the time the operator spends in the high-risk filling area, effectively reducing the safety threat to the operator from dust, sparks, and accidental explosions during the filling process, and improving the safety of the filling process. At the same time, after isolation by the first explosion-proof wall, if an abnormal explosion occurs during the filling process, it can effectively block the propagation of shock waves and high-temperature flames to the inner cylinder feeding unit and the personnel area, further ensuring operational safety. It is understood that the number of inner cylinder feeding units, inner cylinder filling units, and feeding ports corresponds to each other and can be arbitrarily set by those skilled in the art as needed. More preferably, a fireproof door is provided at the feeding port. When fireworks assembly is being carried out, the fireproof door is closed to isolate the inner cylinder feeding and inner cylinder filling, ensuring the safety of fireworks assembly.

[0123] Preferred, Reference Figure 1 and Figure 17 The first explosion-proof wall 71 is H-shaped and includes: a horizontal wall 711 and side walls 712;

[0124] The transverse wall 711 is set between the side walls 712 and is provided with a feeding port 71a corresponding to the inner cylinder filling unit 4;

[0125] The side wall 712 extends vertically along the transverse wall 711 and combines with the transverse wall 711 to form a "U"-shaped space below the transverse wall 711 and a "U"-shaped space above the transverse wall 711.

[0126] The inner cylinder feeding unit 4 is located in the U-shaped space below the transverse wall 711, and the inner cylinder filling unit 4 is located in the U-shaped space above the transverse wall 711.

[0127] In this embodiment, the transverse wall is positioned between the side walls, and a feeding port corresponding to the inner cylinder filling unit is provided on the transverse wall. This facilitates precise docking of the inner cylinder feeding unit to the inner cylinder filling unit when conveying the fireworks inner cylinder cake, ensuring the continuity and accuracy of the feeding process, while preventing material from falling or getting stuck, and improving feeding stability. Simultaneously, the side walls extend vertically along the transverse wall and combine with it to form a "U"-shaped space below the transverse wall and a "U"-shaped space above the transverse wall. The inner cylinder feeding unit is located in the "U"-shaped space below the transverse wall, and the inner cylinder filling unit is located in the "U"-shaped space above the transverse wall. When sparks, high-temperature gas flow, or abnormal explosions are generated during the filling process of the inner cylinder filling unit, they can be released towards the "U"-shaped opening above the transverse wall, avoiding direct impact on the area where the inner cylinder feeding unit is located. In the event of an anomaly, this can limit the range of shock wave, flame spread, and dust dispersion, improve the explosion-proof and protective effect, and thus effectively protect the area where the inner cylinder feeding unit is located.

[0128] More preferably, refer to Figure 17 An explosion-proof door 712a is installed on the side wall 712 above the transverse wall 711. The explosion-proof door 712a is initially opened for initial equipment installation; it is normally closed to isolate the inner cylinder filling unit 4 from the outside.

[0129] Preferred, Reference Figure 1 and Figure 17 The fireworks assembly line also includes: a second explosion-proof wall 2c, a third explosion-proof wall 3c, and a fourth explosion-proof wall 4c;

[0130] Among them, the second explosion-proof wall 2c is set up around the firing and filling unit 2;

[0131] The third explosion-proof wall 3c, together with the first explosion-proof wall 71 and the second explosion-proof wall 2c, are arranged around the bottom paper unit 3.

[0132] The fourth explosion-proof wall 4c and the first explosion-proof wall 71 are together enclosed around the pressing paper unit 5;

[0133] The first explosion-proof wall 71, the second explosion-proof wall 2c, the third explosion-proof wall 3c and the fourth explosion-proof wall 4c cooperate with each other to form a "U"-shaped explosion relief surface on the side of the inner cylinder filling unit 4, the firing nitrate filling unit 2, the bottom paper pressing unit 3 and the top paper pressing unit 5 near the transmission bus 1.

[0134] In this embodiment, the fireworks assembly line is equipped with a second, third, and fourth explosion-proof wall to isolate units prone to hazardous reactions, such as the pyrotechnic filling unit, the bottom paper pressing unit, and the top paper pressing unit. This effectively limits the explosion propagation range and improves the overall safety level of the production line. Furthermore, the first, second, third, and fourth explosion-proof walls work together to create a U-shaped venting surface near the main transmission line. This effectively guides the high-temperature gas and shock wave generated by the explosion in a predetermined direction, preventing disorderly venting from causing injury to personnel or equipment. More importantly, the explosion-proof walls work together to form a standardized U-shaped structure, facilitating modular layout of the process line and simplifying subsequent adjustments, expansions, and maintenance.

[0135] More preferably, refer to Figure 1 Production channels 81 are provided on the first explosion-proof wall 71, the second explosion-proof wall 2c, and the fourth explosion-proof wall 4c, enabling operators and equipment to carry out necessary material handling, maintenance, and inspection between units, ensuring production continuity and flexible scheduling.

[0136] More preferably, refer to Figure 1 The fireworks outer tube feeding unit 1a and the automatic unloading unit 1b are respectively connected to the conveyor bus 1 via conveyor belts passing through the third explosion-proof wall 3c and the fourth explosion-proof wall 4c.

[0137] In this embodiment, by adding conveyor belts passing through the third and fourth explosion-proof walls at the fireworks outer tube loading and fireworks product unloading positions, and cooperating with the aforementioned first explosion-proof wall, effective isolation is achieved between the fireworks outer tube loading, fireworks inner tube loading, fireworks finished product unloading, and the final assembly area. Even if an abnormal explosion occurs during the final assembly process, the corresponding explosion-proof walls can block the outward spread of flames and shock waves, thereby significantly improving operational safety. Taking the manual operation of fireworks outer tube loading, fireworks inner tube loading, and fireworks finished product unloading as an example, this production line sets up explosion-proof walls at each loading and unloading position and uses a conveyor bus to achieve automatic material transfer, allowing operators to complete loading and unloading actions only outside the explosion-proof isolation area. This achieves separation of man and machine, and separation of man and gunpowder, avoiding direct contact between personnel and the gunpowder handling area, significantly improving the inherent safety of the production process. At the same time, the arrangement of the conveyor belts passing through the explosion-proof walls ensures continuous material transfer between the loading, final assembly, and unloading stages, without affecting the smoothness of process connections, while also meeting the requirements of protective isolation. Preferably, refer to Figure 1 The fireworks assembly line also includes: a first visual inspection device 91, a second visual inspection device 92, and a third visual inspection device 93;

[0138] The first visual inspection device 91 is located between the nitric acid filling unit 2 and the bottom paper pressing unit 3;

[0139] The second visual inspection device 92 is disposed between the bottom paper pressing unit 3 and the inner cylinder filling unit 4;

[0140] The third visual inspection device 93 is located behind the pressing paper unit 5;

[0141] The first visual inspection device 91, the second visual inspection device 92 and the third visual inspection device 93 each include: a visual inspection component and a separation conveyor line;

[0142] The separation conveyor line separates defective products based on the visual inspection results.

[0143] In this embodiment, a first visual inspection device, a second visual inspection device, and a third visual inspection device are added to the fireworks assembly line. These are located between the launching gunpowder filling unit and the bottom paper pressing unit, between the bottom paper pressing unit and the inner cylinder filling unit, and behind the top paper pressing unit, respectively. These devices enable real-time inspection after key processes in the production flow, promptly identifying filling, pressing, or assembly defects to ensure product quality. Each visual inspection device includes a visual inspection component and a separation conveyor line. The visual inspection component can inspect the appearance, size, position, and integrity of the fireworks. The separation conveyor line automatically removes defective products based on the inspection results, preventing them from flowing into subsequent processes and reducing rework and safety hazards. It is worth noting that the key aspect of this application is providing a fireworks assembly line that achieves integrated automated installation of fireworks from a mechanical structure perspective, enabling safe production. Specific visual inspection methods, visual control processes, and visual inspection techniques can all be implemented using programmable logic devices such as PLCs or existing technologies, and will not be elaborated upon here.

[0144] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A fireworks assembly line, characterized in that, include: The system includes a conveyor bus and, along with the conveyor bus, a firing nitrous oxide filling unit, a bottom paper pressing unit, an inner cylinder filling unit, and a top paper pressing unit arranged sequentially. The inner cylinder filling unit includes a material handling device, a conveying device, a pushing device, a guiding device, and a pressing device. The material handling device is used to remove the binding straps from the inner cylinder of the fireworks and push the inner cylinder of the fireworks layer by layer into the conveying device. The conveying device is used to transport the inner tube of the fireworks to the pushing device; the pushing device is located on one side of the conveying device and is used to push the inner tube of the fireworks into the guiding device located on the other side of the conveying device; the pressing device is used to press the inner tube of the fireworks in the guiding device into the outer tube of the fireworks.

2. The fireworks assembly line according to claim 1, characterized in that... The material handling device includes: a conveying component, a first pushing component, a clamping component, a lifting component, and a second pushing component; A conveying assembly for conveying the inner tube of a firework to a first pushing assembly includes a horizontal conveyor line and feeding clamps spaced apart on the horizontal conveyor line, the feeding clamps having a first cavity that matches the shape of the inner tube of the firework. A first pushing component is disposed on the first side of the conveying component, and the first pushing component is provided with a first pusher corresponding to the inner tube of the firework. A clamping assembly is disposed on the second side of the conveying assembly and between the lifting assembly. The clamping assembly removes the cable ties on the inner tube of the firework under the push of the first pusher, and then conveys the inner tube of the firework after the cable ties have been removed to the lifting assembly. The lifting assembly is equipped with a fifth chamber to accommodate the inner tube of the fireworks, and lifts the inner tube of the fireworks to a predetermined position; The second pushing component is positioned above the first pushing component and has a second pusher head at the telescopic end, used to push out the inner tube of the fireworks component layer by layer.

3. The fireworks assembly line according to claim 2, characterized in that, The clamping assembly includes: a first clamping member and a second clamping member disposed on both sides of the clamping assembly; The first clamping member and the second clamping member are symmetrically arranged, and both the first clamping member and the second clamping member include an upper clamping block, a lower clamping block and a clamping drive member; The upper clamping block and the lower clamping block are arranged symmetrically at a preset angle; The clamping drive unit drives the upper and lower clamping blocks to clamp the inner tube of the firework.

4. The fireworks assembly line according to claim 2, characterized in that, The lifting assembly includes: a first side plate, a second side plate, and a second clamp; The first side plate is disposed between the clamping assembly and the first side of the second clamp, and the bottom is provided with a second cavity adapted to the inner tube of the firework, and the top is provided with a third cavity adapted to the second pusher. The second side plate is located on the second side of the second clamp, with its bottom abutting against the second clamp, and a fourth cavity corresponding to the third cavity is provided at the upper end of the second side plate. The second clamp is vertically adjustable and positioned between the first and second side plates, and a fifth cavity adapted to the inner tube of the firework is provided on the second clamp.

5. The fireworks assembly line according to claim 1, characterized in that, The conveying device includes: a first conveyor line that receives and transports the inner tube of the fireworks pushed layer by layer by the second pushing component; The second conveyor line is located below the first conveyor line and includes spaced material distribution troughs for receiving the inner tubes of fireworks and conveying them to the pushing device. The flow guiding component has one end connected to the end of the first conveyor line and the other end inserted into the buffer component, which is used to guide the inner tube of the fireworks into the buffer component. A buffer component, located in the transition area between the first and second conveyor lines and disposed on the second conveyor line, is used to guide the inner tube of the fireworks from the first conveyor line into the material distribution trough of the second conveyor line.

6. The fireworks assembly line according to claim 5, characterized in that, The feeding device is provided with third pushers at intervals along the conveying direction of the second conveyor line, and the third pushers correspond to the material distribution trough. The guidance system includes several guidance channels and relay components; The guide channel corresponds to the corresponding third pusher; each guide channel includes: a horizontal guide section, an arc transition section and a vertical guide section connected end to end; The transfer component is movably installed below the guide channel; the transfer component is equipped with a transfer channel, and each transfer channel corresponds to the corresponding guide channel and the outer tube of the firework. The pressing device is used to press the inner tube of the fireworks from the guide channel into the transfer channel, and press the inner tube of the fireworks in the transfer channel into the outer tube of the fireworks.

7. The fireworks assembly line according to claim 1, characterized in that... It also includes an inner cylinder feeding unit; The inner cylinder feeding unit and the inner cylinder filling unit are separated by a first explosion-proof wall; The inner cylinder feeding unit is used to feed the inner cylinder into the inner cylinder filling unit through the feeding port on the first explosion-proof wall.

8. The fireworks assembly line according to claim 7, characterized in that... The first blast-proof wall is H-shaped, consisting of transverse walls and side walls; The transverse walls are set between the side walls and are equipped with feeding ports corresponding to the inner cylinder filling units; The side walls extend vertically along the transverse walls and combine with the transverse walls to form a "U"-shaped space below the transverse walls and a "U"-shaped space above the transverse walls. The inner cylinder feeding unit is located in the U-shaped space below the transverse wall, and the inner cylinder filling unit is located in the U-shaped space above the transverse wall.

9. The fireworks assembly line according to claim 8, characterized in that, Also includes: Second blast-proof wall, third blast-proof wall and fourth blast-proof wall; The second explosion-proof wall is set up around the firing and loading unit; The third explosion-proof wall, together with the first and second explosion-proof walls, is set up around the bottom paper unit; The fourth explosion-proof wall and the first explosion-proof wall are together enclosed around the paper pressing unit; The first, second, third, and fourth explosion-proof walls work together to form a "U"-shaped explosion-proof surface on the side of the inner cylinder filling unit, the nitrate-emitting filling unit, the bottom paper pressing unit, and the top paper pressing unit near the transmission bus.

10. The fireworks assembly line according to claim 9, characterized in that, Also includes: First visual inspection device, second visual inspection device and third visual inspection device; The first visual inspection device is located between the nitric acid filling unit and the bottom paper pressing unit; The second visual inspection device is installed between the bottom paper pressing unit and the inner cylinder filling unit; The third visual inspection device is located behind the paper pressing unit; The first visual inspection device, the second visual inspection device, and the third visual inspection device all include: a visual inspection component and a separation conveyor line; The separation conveyor line separates defective products based on the visual inspection results.

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