Forming device for combined firework interval type special-shaped cylinder row

Abstract

The utility model discloses a forming device for a combined firework interval type special-shaped cylinder row, a plurality of guide cylinder shifting pieces are arranged above a bearing platform which ascends and descends step by step, each guide cylinder shifting piece is provided with a cavity channel for restraining a single firework cylinder, the front end of each cavity channel is provided with a limiting piece for blocking the front end of a cylinder body, and the lower portion of each cavity channel is open; a telescopic supporting plate is arranged between the guide shifting cylinder piece and the bearing platform; each firework cylinder is fed into a cavity channel of each guide cylinder shifting piece, and the lower side of each firework cylinder is supported when the supporting plate extends out; the guide cylinder shifting piece is hinged to the rack, the pitch changing mechanism is connected with the guide cylinder shifting piece and drives the guide cylinder shifting piece to swing around a hinged part, and all firework cylinders swing along with the guide cylinder shifting piece to obtain a special-shaped cylinder row. And the forming processing of the interval type special-shaped cylinder row can be reliably finished.

Description

Technical Field

[0001] This utility model relates to a forming device for a combination of firework interval-type irregular tube arrays. Background Technology

[0002] Combination fireworks typically consist of several paper firework tubes arranged in a single row, called a tube array. The tubes are then perforated and fitted with fuses; ignition holes are drilled into each tube, and fuses are inserted into these holes, connecting the tubes to form a ignition link. Currently, most tube arrays are vertical, with the tubes arranged parallel to each other. Several vertical tube arrays are then stacked and assembled into a block (called a "combination firework"), resulting in a vertical combination firework. The firework tubes contain propellant and effect components, ignited by the fuse. The equipment used to complete this assembly is commonly referred to in the industry as a "combination firework machine" or "firework assembly machine," and it is a relatively mature and widely used type of fireworks machinery.

[0003] However, besides upright combination fireworks, existing products also include irregularly shaped combination fireworks, which are fireworks products assembled from stacked irregularly shaped tubes. In this invention, the end of the upright or irregularly shaped tube array near the perforated insertion part is called the lower end of the tube array or fireworks tube, and the end away from the perforated insertion part is called the upper end of the tube array or fireworks tube. The arrangement structure of the fireworks tubes in the irregularly shaped tube array is such as fan-shaped, W-shaped, V-shaped, left-leaning, right-leaning, five-finger-shaped, etc.; unlike the upright tube array, the fireworks tubes in the irregularly shaped tube array have a certain tilt angle (launch deflection angle) between each other, the lower ends of each fireworks tube are close together, and there is a gap between the upper ends of adjacent fireworks tubes. Therefore, current assembly equipment can only complete the production of upright combination fireworks and cannot process irregularly shaped fireworks products.

[0004] To achieve the processing of irregularly shaped fireworks products, we have conducted extensive research and development over the past two years. Currently published Chinese patent documents include: CN221527524U, published on August 13, 2024, entitled "A Forming Device for Irregularly Shaped Tubes for Firework Assembly"; CN116929155A, published on October 24, 2023, entitled "An Irregularly Shaped Tube Forming Device for Irregularly Shaped Combined Fireworks"; and CN116907283A, published on October 20, 2023, entitled "An Irregularly Shaped Tube Forming Equipment for Irregularly Shaped Combined Fireworks," etc. This utility model cites the aforementioned patent documents in full.

[0005] However, the previously developed irregular-shaped tube bar forming equipment was all designed for mainstream combination fireworks products, where the lower ends of the tubes in the tube bar were close together without gaps. There is also a relatively niche combination fireworks product on the market, mainly sold to the North American market; its structure is described below.Figure 1 , 2 As shown, the main feature of this tube array is the spacing between the lower ends of each firework tube 1001. The firework tubes are arranged in a fan shape, but could also be arranged in a W-shape, V-shape, left-leaning shape, right-leaning shape, or five-finger shape. A ignition fuse 1002 is installed between each firework tube 1001, and fireproof paper 1003 can be installed between the tube arrays to prevent crossfire. In this invention, this type of tube array is referred to as an interval-type irregular tube array. Currently, there is a lack of equipment capable of processing interval-type irregular tube arrays. Utility Model Content

[0006] To address the aforementioned drawbacks, the technical problem this invention aims to solve is to provide a device capable of processing intermittently shaped firework tubes. The technical solution adopted by this invention is a forming device for intermittently shaped firework tubes, comprising a progressively lifting receiving platform; characterized in that several guide tube components are arranged above the receiving platform, each guide tube component having a cavity for constraining a single firework tube, a limiting component at the front end of the cavity blocking the front end of the tube, and the lower part of the cavity being open; a telescopic support plate is provided between the guide tube components and the receiving platform; each firework tube is fed into the cavity of its respective guide tube component, and the support plate supports the lower side of each firework tube when extended; the guide tube components are hinged to a frame, and a pitch-changing mechanism connects to and drives the guide tube components to swing around the hinge, with each firework tube following the swing of the guide tube components to form the shaped tube array.

[0007] The beneficial effects of this utility model are as follows: During feeding, the support plate extends, and the lower side of the fed firework tube is supported by the support plate, while the left and right sides are constrained by the cavities of the guide tube components, forming a dynamic firework tube positioning system; when the variable pitch mechanism drives the guide tube components to swing around the hinge, each firework tube follows the swing of the guide tube components to form a shaped tube array; then the support plate retracts, the shaped tube array is received by the receiving platform, the receiving platform descends one position, the support plate extends again to feed, and the above process is repeated to process the second shaped tube array, then the support plate retracts again, and the second shaped tube array is stacked and glued on top of the first shaped tube array, and so on until a combined firework is formed. Thus, the forming process of the interval shaped tube array is reliably completed.

[0008] In one embodiment, the variable pitch mechanism includes a transmission plate with a plurality of guide grooves, each guide groove corresponding to the arrangement structure of each firework tube in the irregular tube row; each guide groove is provided with a follower; the transmission plate drive member drives the transmission plate to reciprocate linearly; each guide tube is connected to the follower; the transmission plate drives the guide tube to swing around the hinge part through the guide grooves and the follower.

[0009] Furthermore, in one embodiment, the pitch-changing mechanism further includes several sliding seats mounted on the sliding guide rail, each sliding seat being connected to a pitch-changing linkage, one end of the pitch-changing linkage being connected to the follower, and the other end being hinged to the guide cylinder; the transmission plate sequentially drives the guide cylinder to swing around the hinge portion through the guide groove, the follower, and the pitch-changing linkage.

[0010] Furthermore, in one embodiment, the guide cylinder has a guide tail on one side of the hinge point and the cavity on the other side of the hinge point; the guide cylinder forms a lever structure with the hinge point as the lever fulcrum; the follower is connected to the guide tail, and the transmission plate drives the guide cylinder to swing around the hinge through the guide groove and the follower.

[0011] In one embodiment, the pitch-changing mechanism includes a rotating shaft with a plurality of spiral guide grooves distributed on the outer circumferential surface of the rotating shaft, and a follower provided in each guide groove; each guide cylinder is connected to the follower; the rotating shaft drive drives the rotating shaft to reciprocate, and the rotating shaft drives the guide cylinder to swing around the hinge part through the guide grooves and the follower.

[0012] In one embodiment, the pitch-changing mechanism includes a plurality of first slide blocks mounted on a first slide rail. Adjacent first slide blocks are movably connected by limiting guide posts. A sliding drive member drives each first slide block to reciprocate along the first slide rail, causing each first slide block to move closer or further apart. The limiting guide posts limit the separation distance between adjacent first slide blocks. The length of the separation distance is set in accordance with the inter-cylinder spacing of the irregularly shaped cylinder. The first slide blocks are connected to and drive the guide cylinder to swing around the hinge.

[0013] In one embodiment, the pitch-changing mechanism includes a plurality of second slide blocks mounted on a second slide rail. Each second slide block is connected to a connecting belt via a connection point, and the spacing between each connection point corresponds to the inter-cylinder spacing at the upper end of the irregular-shaped cylinder. The connecting belt is provided with a traction drive component, which drives each second slide block to reciprocate along the second slide rail via the connecting belt, causing each second slide block to move closer together or apart. The spacing between each connection point on the connecting belt limits the separation distance between two adjacent second slide blocks. The second slide blocks connect to and drive the guide cylinder component to swing around the hinge.

[0014] Preferably, the limiting component is an arc-shaped positioning plate or a rod.

[0015] Preferably, the guide cylinder includes a base, and the cavity is formed between the limiting bodies on both sides below the base.

[0016] In one embodiment, the receiving platform is provided with lifting guides at its front and rear ends, and the lifting guides have several limiting grooves distributed on them corresponding to the number of firework tubes in the irregularly shaped tube array.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time.

[0018] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a spaced-out irregular-shaped cylindrical array (fan-shaped);

[0025] Figure 2 This is a schematic diagram of the product structure of a spaced-out irregular cylindrical (fan-shaped) basin assembly;

[0026] Figure 3 This is a schematic diagram of the overall structure of the potting machine in Example 1;

[0027] Figure 4 This is a simplified structural diagram of the potting machine equipment in Example 1;

[0028] Figure 5 This is a schematic diagram of the molding apparatus and its related components in Example 1 (without a firework tube loaded);

[0029] Figure 6 This is a schematic diagram of the guide cylinder component in Example 1;

[0030] Figure 7 Schematic diagrams of five other structural forms of the guide cylinder component;

[0031] Figure 8 A schematic diagram of a structure using an arc-shaped positioning plate for the limiting component;

[0032] Figure 9 This is a schematic diagram of the support plate in Example 1;

[0033] Figure 10 This is a schematic diagram of the pressure strip structure in Example 1;

[0034] Figure 11 This is a schematic diagram of the molding device in Example 1 (including the transmission plate and all pitch linkages);

[0035] Figure 12 This is a schematic diagram of the molding device in Example 1 (with the transmission plate removed, leaving only a variable pitch connecting rod).

[0036] Figure 13 This is a schematic diagram of the molding apparatus in Example 2.

[0037] Figure 14 This is a schematic diagram of the molding device in Example 3 (including the transmission plate);

[0038] Figure 15 This is a schematic diagram of the molding device in Example 3 (with the transmission plate removed).

[0039] Figure 16 This is a schematic diagram of the molding apparatus in Example 4.

[0040] Figure 17 This is a first-view structural schematic diagram of the molding apparatus in Example 5;

[0041] Figure 18 This is a second-view structural schematic diagram of the molding apparatus in Example 5.

[0042] Figure 19 This is a schematic diagram of the feeding state structure of the molding device in Example 6;

[0043] Figure 20 This is a schematic diagram of the swing state structure of the molding device in Example 6. Detailed Implementation

[0044] Example 1: See Appendix Figure 1-12 This illustrates a specific structure of the present invention. In this work scenario, the forming device for the intermittent irregular-shaped tube array of combined fireworks is installed on the assembly machine. The irregular-shaped tube array processed in this example is a fan-shaped tube array.

[0045] The assembly machine includes a hopper 1004. Firework tubes 1001 stored in the hopper 1004 are distributed to various distribution troughs 1005. The fireworks tubes 1001 in each distribution trough 1005 are connected end to end and pushed to the forming device by a tube pusher 1006. During the pushing process, the ignition fuse 1002 is installed by a punching and inserting device 1007, and glue is applied to the fireworks tubes 1001 by a gluing device 1008. In the forming device, the fireworks tubes are processed into irregularly shaped tube arrays. Several irregularly shaped tube arrays are stacked to form a block 1009, which is then pushed to the conveying device 1011 by a tube pusher 1010 for delivery.

[0046] The example also includes a fireproof paper roll 1012 and its paper feeding and cutting mechanism 1013. The cutting mechanism 1013 cuts easy-tear lines on the paper strip, which is then fed onto the irregularly shaped tube and glued to the firework tube. As the irregularly shaped tube descends, it tears the easy-tear lines, and the paper strip adhering to the tube constitutes the fireproof paper 1003. Except for the forming of the spaced irregularly shaped tube, the above process utilizes mature technologies from firework assembly machines and will not be elaborated further.

[0047] The forming device includes a receiving platform 1 that rises and falls in stages. In this example, the platform motor 101 drives the receiving platform 1 to rise and fall in stages along the platform guide rail via a lead screw and nut assembly.

[0048] Several guide tube components 2 are installed above the receiving platform 1. Each guide tube component 2 has a cavity 201 that constrains a single firework tube 1001. A limiting member 3 is provided at the front end of the cavity 201 to block the front end of the tube. The lower part of the cavity 201 is open. In this example, the guide tube component 2 includes a base 202, and the cavity 201 is formed between the limiting members 203 on both sides below the base 202. The lower end of the limiting member 203 can be flush with the bottom side of the firework tube to ensure effective constraint and reliable swing. In this example, the limiting member 203 consists of six rods.

[0049] In other embodiments, the limiting body 203 may also be other cavity structures capable of constraining the side of the firework tube 1001, including but not limited to... Figure 7 The structure shown is such that the base 202 has a hinge shaft 204 and a secondary follower 205 at each end.

[0050] In this example, the limiting member 3 is a rod fixed to the base 202. In other embodiments, the limiting member 3 can also be any other structure capable of blocking the front end of the firework tube 1001. The limiting member 3 can also be separated from the guide tube 2, such as using... Figure 8 The arc-shaped positioning plate 3-1 is shown.

[0051] A support plate 4 driven by a telescopic cylinder 401 is set between the guide cylinder 2 and the receiving platform 1; each firework tube 1001 is fed into the cavity 201 of the guide cylinder 2 respectively, and the support plate 4 supports the lower front end of each firework tube 1001 when it extends; the hinge shaft 204 of the guide cylinder 2 is hinged to the frame, and the pitch mechanism is connected to and drives the guide cylinder 2 to swing around the hinge shaft 204, and each firework tube 1001 follows the swing of the guide cylinder 2 to obtain a special-shaped tube array.

[0052] In the example, the variable pitch mechanism includes a transmission plate 502 with a plurality of guide grooves 501. In the example, each guide groove 501 corresponds to the arrangement of each firework tube 1001 in the fan-shaped tube array. In other embodiments, each guide groove may also correspond to the arrangement of each firework tube in a W-shaped, V-shaped, left-leaning, right-leaning, or five-finger-shaped tube array.

[0053] Each guide groove 501 is provided with a follower 503; the drive cylinder 504 of the transmission plate 502 drives the transmission plate 502 to reciprocate linearly along the guide post 505; each guide cylinder 2 is connected to the follower 503. In the example, the pitch changing mechanism also includes several sliding seats 507 installed on the sliding guide rail 506. Each sliding seat 507 is connected to the pitch changing link 508. One end of the pitch changing link 508 is connected to the follower 503, and the other end is hinged to the auxiliary follower 205 of the guide cylinder. The transmission plate 502 drives the guide cylinder 2 to swing around the hinge axis 204 in sequence through the guide groove 501, the follower 503, the pitch changing link 508, and the auxiliary follower 205.

[0054] In the example, each guide cylinder 2 has a pressure strip 6 below its base 202. The length of the pressure strip 6 is set according to the width of the irregular cylinder. The pressure strip 6 is connected to the pressure strip drive component - the pressure strip cylinder 601, which moves up and down along the pressure strip slide rod 602.

[0055] During operation, the support plate 4 extends during feeding, and the firework tube 1001 in the material distribution trough 1005 is sent into the cavity 201. The lower front end of the firework tube 1001 is supported by the support plate 4, the lower rear end is supported by the receiving platform 1, and the left and right sides are constrained by the limiting body 203 of the cavity 201, forming a dynamic firework tube positioning system. This system makes full use of the structural characteristics of the spaced irregular tube array to constrain the firework tube without affecting the forming swing, which makes it easy to directly stack and assemble the irregular tube array after forming, and can also effectively protect the ignition fuse 1002.

[0056] When the variable pitch mechanism drives the guide cylinder 2 to swing around the hinge, each firework tube 1001 follows the swing of the guide cylinder 2 to form an irregular tube array; thus reliably completing the forming process of the interval irregular tube array.

[0057] Then the support plate 4 retracts, and the irregular cylindrical tube is received by the receiving platform 1. The paper tape that was fed into the receiving platform 1 beforehand is pasted on the lower side of the irregular cylindrical tube. The upper pressure strip 6 moves down to press down the irregular cylindrical tube and the paper tape. The receiving platform 1 descends one station. When the irregular cylindrical tube moves down, the easy-tear line is torn. The paper tape that is adhered to the irregular cylindrical tube constitutes the fireproof paper 1003.

[0058] The support plate 4 extends again for feeding, and the above process is repeated to process the second irregular cylindrical section; then the support plate 4 retracts again, and the second irregular cylindrical section is stacked and glued onto the fireproof paper 1003 of the first irregular cylindrical section, and so on until the receiving platform 1 reaches the lower limit position. The pusher 1010 pushes a block-shaped whole 1009 composed of several irregular cylindrical sections stacked together onto the conveyor 1011 for delivery. During delivery, the support cylinder 1015 is activated, supporting the cylindrical section above the block-shaped whole 1009. After the receiving platform 1 rises to receive the upper cylindrical section, the support cylinder 1015 resets.

[0059] In the example, the receiving platform 1 is provided with a front lifting guide 101 and a rear lifting guide 102, and several limiting grooves 103 are distributed on the two lifting guides corresponding to the number of firework tubes 1001 in the irregular tube array, so as to avoid the firework tubes from becoming disordered during the descent.

[0060] Example 2: See Appendix Figure 13 This presents another specific structure of the present invention. The difference from Embodiment 1 is that the sliding guide rail 506, sliding seat 507, variable pitch connecting rod 508, and auxiliary follower 205 of Embodiment 1 are omitted in this example. The follower 503 within the guide groove 501 of the transmission plate 502 is directly connected to one end of the base 202. The transmission plate 502 directly drives the guide cylinder 2 to swing around the hinge shaft 204 via the guide groove 501 and the follower 503 in sequence. The transmission of the variable pitch connecting rod 508 is no longer needed. The structure is more concise and compact, but it hinders the operator from observing the operation of the device.

[0061] Example 3: See Appendix Figure 14-15 This reflects another specific structure of the present invention. The difference from Embodiment 1 is that: the guide cylinder 2 has a guide tail 206 on one side of the hinge shaft 204, and the cavity 201 on the other side of the hinge shaft 204; the guide cylinder 2 forms a lever structure with the hinge shaft 204 as the lever fulcrum; the follower 503 is connected to the guide tail 206, and the transmission plate 502 drives the guide tail 206 to swing through the guide groove 501 and the follower 503, so that the cavity 201 of the guide cylinder 2 swings around the hinge shaft 204.

[0062] Example 4: See Appendix Figure 16 This reflects another specific structure of the present invention. The difference from Embodiment 1 lies in the pitch-changing mechanism: the pitch-changing mechanism includes a rotating shaft 509, with a plurality of spiral guide grooves 510 distributed on the outer circumferential surface of the rotating shaft 509, and a follower 503 provided in each guide groove 510; each guide cylinder 2 is connected to the follower; the rotating shaft motor 511 drives the rotating shaft 509 to reciprocate, and the rotating shaft 509 drives the guide cylinder 2 to swing around the hinge shaft 204 through the guide grooves 510 and the follower 503.

[0063] Example 5: See Appendix Figure 17 , 18This reflects another specific structure of the present invention. The difference from Embodiment 1 lies in the different pitch-changing mechanism: the pitch-changing mechanism includes several first slide blocks 513 mounted on the first slide rail 512. Two adjacent first slide blocks 513 are movably connected by a limiting guide post 514. The sliding drive component—sliding cylinder 515—drives each first slide block 513 to reciprocate along the first slide rail 512, causing each first slide block 513 to move closer or further apart. When they move closer (reset), they are sent into the firework tube 1001 into the cavity 201. When they move apart, the pitch-changing effect is achieved. The first slide blocks 513 are connected by a follower component 503 and drive the guide cylinder component 2 to swing around the hinge axis 204.

[0064] The limiting guide post 514 limits the separation distance between two adjacent first slide blocks 513, and the length of the separation distance is set in accordance with the inter-tube spacing of the irregular tube array.

[0065] In the example, among the twelve first slides 513 arranged side by side, the two central first slides 513 are fixed to the frame by connecting pieces 5131 to achieve a fan-shaped arrangement. Other irregular cylindrical arrays, such as V-shaped cylindrical arrays, W-shaped cylindrical arrays, left-leaning cylindrical arrays, right-leaning cylindrical arrays, and five-finger cylindrical arrays, can be configured as needed.

[0066] The piston rod end of the sliding cylinder 515 is connected to the end first slide block 513, and the cylinder body of the sliding cylinder 515 is connected to the beginning first slide block 513. The sliding cylinder 515 drives the first slide block 513 to move back and forth along the guide post 302 between the initial position and the working position: in the initial position, the first slide blocks 513 are relatively close together. When the sliding cylinder 515 drives the first slide blocks 513 to slide and separate from each other, the length of the limiting guide post 514 determines the maximum distance between the first slide blocks 513. When the length of the limiting guide post 514 restricts the first slide blocks 513 from continuing to slide, the working position is reached.

[0067] In this example, a single driving element is used to pull the slide block assembly connected by the limiting guide post 514; in other embodiments, two driving elements can simultaneously pull the connected slide block assembly from both sides, or other driving methods can be used to make it move back and forth along the first slide rail 512 between the initial position and the working position, so that it is arranged in a corresponding irregular cylindrical array.

[0068] Example 6: See Appendix Figure 19 , 20This reflects another specific structure of the present invention. The difference from Embodiment 1 lies in the pitch-changing mechanism: the pitch-changing mechanism includes several second slide blocks 517 mounted on the second slide rail 516, each second slide block 517 being connected to the connecting belt 519 via connection points 518, the spacing between each connection point 518 corresponding to the inter-cylinder spacing at the upper end of the irregular cylindrical array; the connecting belt 519 is provided with a traction drive component—traction cylinder 520, the traction drive component drives each second slide block 517 to reciprocate along the second slide rail 516 via the connecting belt 519, causing each second slide block 517 to move closer or further apart; the spacing between each connection point 518 on the connecting belt 519 limits the separation distance between two adjacent second slide blocks 517; the second slide blocks 517 connect to and drive the guide cylinder 2 to swing around the hinge axis 204.

[0069] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and describes these embodiments in detail with reference to the accompanying drawings to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is limited only to the claims and their full scope and equivalents, and not to the specific embodiments disclosed.

Claims

1. A forming device for a combination of intermittent irregular-shaped firework tubes, comprising a receiving platform that rises and falls in stages; characterized in that, Several guide tubes are arranged above the receiving platform. Each guide tube has a cavity that constrains a single firework tube. A limiting member is provided at the front end of the cavity to block the front end of the tube. The bottom of the cavity is open. A telescopic support plate is provided between the guide tube and the receiving platform. Each firework tube is fed into the cavity of each guide tube. When the support plate extends, it supports the lower side of each firework tube. The guide tube is hinged to the frame. A pitch-changing mechanism is connected to and drives the guide tube to swing around the hinge. Each firework tube follows the swing of the guide tube to form an irregularly shaped tube array.

2. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The variable pitch mechanism includes a transmission plate with several guide grooves, each guide groove corresponding to the arrangement of the various firework tubes in the irregular tube array; each guide groove is provided with a follower; the transmission plate drive unit drives the transmission plate to reciprocate linearly; each guide tube is connected to the follower; the transmission plate drives the guide tube to swing around the hinge part through the guide grooves and the follower.

3. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 2, characterized in that, The pitch-changing mechanism also includes several sliding seats installed on the sliding guide rail. Each sliding seat is connected to a pitch-changing link. One end of the pitch-changing link is connected to the follower, and the other end is hinged to the guide cylinder. The transmission plate drives the guide cylinder to swing around the hinge part in sequence through the guide groove, the follower, and the pitch-changing link.

4. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 2, characterized in that, The guide cylinder has a guide tail on one side of the hinge point and the cavity on the other side of the hinge point; the guide cylinder forms a lever structure with the hinge point as the lever fulcrum; the follower is connected to the guide tail, and the transmission plate drives the guide cylinder to swing around the hinge part through the guide groove and the follower.

5. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The pitch-changing mechanism includes a rotating shaft with several spiral guide grooves distributed on the outer circumferential surface of the rotating shaft. Each guide groove contains a follower. Each guide cylinder is connected to a follower. The rotating shaft drive drives the rotating shaft to reciprocate. The rotating shaft drives the guide cylinder to swing around the hinge part through the guide grooves and the follower.

6. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The pitch-changing mechanism includes several first slide blocks mounted on a first slide rail. Adjacent first slide blocks are movably connected by limiting guide posts. A sliding drive component drives each first slide block to reciprocate along the first slide rail, causing each first slide block to move closer or further apart. The limiting guide posts limit the separation distance between adjacent first slide blocks. The length of the separation distance is set to correspond to the inter-cylinder spacing of the irregular cylinder. The first slide blocks connect to and drive the guide cylinder component to swing around the hinge.

7. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The pitch-changing mechanism includes several second slide blocks mounted on a second slide rail. Each second slide block is connected to a connecting belt via a connection point. The spacing between each connection point corresponds to the spacing between the cylinders at the upper end of the irregular cylinder array. The connecting belt is equipped with a traction drive component, which drives each second slide block to reciprocate along the second slide rail via the connecting belt, causing each second slide block to move closer together or apart. The spacing between each connection point on the connecting belt limits the separation distance between two adjacent second slide blocks. The second slide blocks connect to and drive the guide cylinder component to swing around the hinge.

8. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The limiting component is an arc-shaped positioning plate or a rod.

9. The forming device for a combination of intermittent irregular-shaped firework tubes as described in claim 1, characterized in that, The guide cylinder includes a base, and the cavity is formed between the limiting bodies on both sides below the base.

10. The forming device for a combined fireworks intermittent irregular-shaped tube array as described in claim 1, characterized in that, The receiving platform is equipped with lifting guides at its front and rear ends, and the lifting guides have several limiting grooves distributed on them corresponding to the number of firework tubes in the irregularly shaped tube array.

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