Double-door type conveying mechanism for filling inner cylinder of firework

Abstract

This utility model discloses a split-type conveying mechanism for filling the inner cylinder of fireworks. It includes a storage hopper for storing the inner cylinder and an intermediate hopper connected to the upper middle part of the storage hopper for discharging material from the inner cylinder. Columns are arranged on both sides of the intermediate hopper, and lifting rods are movably mounted on the columns. The lifting rods are connected to lifting cylinders. Opposite discharge plates are arranged on the intermediate hopper. A translation cylinder is connected to a bracket body that supports the inner cylinder and corresponds to the shape of a regular hexagonal inner cylinder cake. The bracket body is formed by a straight support plate and an inclined support plate. The translation cylinder moves horizontally and synchronously inward to close the inclined support plate and support the inner cylinder cake, and moves horizontally and synchronously outward to separate the inclined support plate. This utility model not only realizes automatic conveying, discharging, distributing, and filling of the inner cylinder, improving filling efficiency, reducing labor intensity, and decreasing the number of workers, but also does not increase the height of the working space. The axis of the inner cylinder will not deviate, ensuring that the inner cylinder smoothly enters the guide trough.

Description

Technical Field

[0001] This utility model relates to fireworks manufacturing equipment, and more particularly to a hopper-type mechanical device mounted on a fireworks inner tube filling machine. Background Technology

[0002] Large-scale fireworks production initially relied on manual methods: first, loosening the clamps on the hexagonal inner tube cake; then, stacking the inner tube (a paper tube containing the effect powder and fuse) in the hopper of an inner tube filling machine; finally, mechanically inserting the inner tube into the launch hole of the molded outer tube of the firework to complete the inner tube filling. However, this method suffers from low inner tube filling efficiency and low production safety. To address these issues and improve inner tube filling efficiency and safety, some fireworks manufacturers now use automated filling equipment to complete the conveying, dropping, distributing, and filling of the inner tubes. Currently, the structures used for conveying, dropping, and distributing the inner tubes in automated filling equipment mostly employ clamps that match the shape of the hexagonal inner tube cake and whose two lower inclined sides supporting the inner tube can rotate and open synchronously to hold the loosened inner tube cake. The inner tube cake is then fed into the intermediate hopper by moving the clamps horizontally and vertically. To ensure the inner cylinder can quickly drop into the intermediate hopper, a sufficient working space must be provided within the intermediate hopper between the starting point of the inner cylinder's drop and the upper surface of the existing uppermost inner cylinder. This working space should not interfere with the synchronous rotation and opening of the two inclined sides at the lower end of the clamp. The height of this working space should be at least half the length of the inclined side greater than the original working space height. Due to the increased working space height and the increased inner cylinder dropping height, when the dropping inner cylinder collides with the upper surface of the existing inner cylinder in the intermediate hopper, some dropping inner cylinders will not maintain parallelism with the axis of the existing inner cylinder after landing. This lateral offset of the dropping inner cylinder axis can prevent some inner cylinders from smoothly entering the guide chute, especially when the inner cylinder diameter is small, affecting the inner cylinder filling efficiency and quality. Utility Model Content

[0003] In response to the problem in the prior art where the inclined sides of the two supporting inner cylinders at the lower end can rotate and open synchronously, causing the inner cylinder axis to shift laterally during material feeding, resulting in some inner cylinders not being able to smoothly enter the guide chute, this utility model provides a fireworks inner cylinder filling hopper split-type conveying mechanism that can realize automatic inner cylinder conveying, feeding, distributing and filling without increasing the working space height. After the feeding inner cylinder is placed, its axis can remain parallel to the existing inner cylinder axis in the middle hopper, and the feeding inner cylinder axis will not shift laterally, ensuring that the inner cylinder smoothly enters the guide chute.

[0004] The technical solution adopted by this utility model to solve the technical problem is as follows: A split-type conveying mechanism for filling the inner tube of fireworks is mounted on a fireworks inner tube filling machine. It includes a storage hopper for storing the inner tube and an intermediate hopper connected to the upper middle part of the storage hopper for discharging material from the inner tube. Columns are provided on both sides of the intermediate hopper. The upper ends of the columns are connected by crossbars, and the lower ends are fixed to a frame on one side of the storage hopper. A lifting rod is movably mounted on the column. Both ends of the lifting rod are fixedly connected to a translation cylinder by hanging plates. The lifting rod is connected to a lifting cylinder located on one side of the intermediate hopper. The lifting cylinder carries... The lifting rod descends, causing the translation cylinder, bracket body, and inner cylinder cake to descend together into the intermediate hopper. The intermediate hopper is equipped with opposing drop plates. The translation cylinder is connected to the bracket body, which supports the inner cylinder and corresponds to the shape of the hexagonal inner cylinder cake. The inner cavity of the bracket body is half a hexagon and is formed by a straight support plate and an inclined support plate. The translation cylinder moves horizontally and synchronously inward, causing the inclined support plate to close and support the inner cylinder cake sent by the conveying mechanism to enter between the drop plates. The translation cylinder moves horizontally and synchronously outward, causing the inclined support plate to separate, allowing the inner cylinder cake to fall into the intermediate hopper.

[0005] This invention addresses the problem of the inner cylinder at both ends of the storage hopper floating up and down with the moving column during operation, without leaving a gap between it and the arc-shaped baffle at the top of the hopper. This prevents the inner cylinder from bouncing excessively due to gaps during its vertical movement, causing horizontal deviation of its axis and affecting its entry into the guide chute. The invention replaces the arc-shaped baffle with a retractable limiting plate made of elastic materials such as rubber or a stretch band, ensuring it remains in close contact with the upper surface of the uppermost inner cylinder. When the inner cylinder moves upward, the limiting plate extends upward under the action of the inner cylinder; when the inner cylinder moves downward, the limiting plate retracts under elastic action, thus maintaining constant contact with the uppermost inner cylinder and preventing gaps between the uppermost inner cylinder and the arc-shaped baffle at the top of the storage hopper.

[0006] The working process of this utility model is as follows: First, the hexagonal inner cylinder cake is clamped using a clamp with an open lower end and secured by a clamp (the clamp is formed by an inverted V-shaped upper clamping plate 48 and side clamping plates 49 movably connected to both ends of the upper clamping plate; the lower end of the clamp is open, and the upper end of the side clamping plates is slidably connected to the upper clamping plate and driven by a double-headed cylinder to clamp the inner cylinder cake). The clamp can move horizontally and descend vertically on the guide rail 2. The clamp is then inserted between the bracket bodies. Then, the clamp on the hexagonal inner cylinder cake is released, allowing the inner cylinder to enter along the drop plate and fall onto a bracket body that is half a hexagonal, formed by two symmetrical straight support plates and an inclined support plate. The position signal obtained by the upper sensor activates the lifting cylinder, causing the translation cylinder and the support... The frame and the inner cylinder cake descend together. When the inner cylinder enters the appropriate position in the intermediate hopper, the lower sensor receives a position signal and the inner cylinder cake stops moving downward. At the same time, the translation cylinder receives a signal and starts working, driving the bracket to move horizontally outward in sync, so that the inner cylinder supported on the bracket quickly falls into the intermediate hopper. With the action of the pulling column, when the inner cylinder enters the guide groove and is placed in the horizontal guide groove on the steering body, the pushing cylinder works, driving the pusher head to simultaneously enter the vertical guide groove that is smoothly connected to the horizontal guide groove. After the inner cylinder enters the vertical guide groove, the compaction cylinder works, driving the compaction rod to press the inner cylinder into the launching hole of the molded outer cylinder to complete the filling of the inner cylinder.

[0007] This invention is based on an existing inner cylinder filling machine. Firstly, it uses a device (or robotic arm) with a clamp at the lower end that allows for horizontal movement and descent to transport the hexagonal inner cylinder cake into the intermediate hopper. Secondly, it improves the frame structure supporting the inner cylinder, allowing the support plates to open horizontally and synchronously, thus lowering the inner cylinder into the intermediate hopper. Because the horizontal movement of the support plates is sufficient for the inner cylinder to fall, there is no need to increase the working space height between the inner cylinder's falling point and the existing inner cylinder's upper surface in the intermediate hopper. When the falling inner cylinder collides with the existing inner cylinder's upper surface in the intermediate hopper, its axis remains essentially parallel to the existing inner cylinder's axis, preventing the inner cylinder's axis from shifting. The design incorporates several improvements. First, it prevents lateral displacement, especially when the inner cylinder diameter is small, allowing it to smoothly enter the guide trough. Second, by replacing the arc-shaped baffle on the storage hopper with a retractable limiting plate made of elastic materials such as rubber or a telescopic belt, it maintains a constant proximity to the inner cylinder. When the inner cylinder moves upward, the limiting plate extends upward under the action of the inner cylinder; when the inner cylinder moves downward, the limiting plate retracts under the action of elasticity. This ensures that the inner cylinder remains close to the topmost inner cylinder, eliminating any gap between the topmost inner cylinder and the arc-shaped baffle at the top of the storage hopper. This effectively solves the problem of significant bouncing caused by gaps when the inner cylinder moves up and down within the storage hopper, leading to horizontal deviation of the inner cylinder's axis and affecting its entry into the guide trough.

[0008] This invention can not only realize automatic conveying, unloading, sorting and filling of the inner cylinder, improve the filling efficiency of the inner cylinder, reduce the labor intensity of filling and reduce the number of workers, but also does not increase the height of the unloading working space. After the unloading inner cylinder is placed, its axis can remain parallel to the existing inner cylinder axis in the intermediate hopper, and the unloading inner cylinder axis will not be laterally offset, ensuring that the inner cylinder smoothly enters the guide chute. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the material unloading process of the inner cylinder in the lower rotating and opening support frame in the existing technology. Figure 2 This is a schematic diagram of the main cross-sectional structure of this utility model. Figure 3 This is a schematic diagram of the structure of the inner cylinder cake after it descends and drops material, according to this utility model. Figure 4 yes Figure 3 A schematic diagram of the structure in direction A. Figure 5 yes Figure 4 Schematic diagram of the BB cross-section structure.

[0010] In the diagram: 1. Inner cylinder cake; 2. Guide rail; 3. Lifting cylinder; 4. Support plate; 5. Support body; 6. Drop point; 7. Lowest rotation line of the support plate; 8. Position line of the uppermost inner cylinder surface in the intermediate hopper; 9. Drop working space; 10. Rotated support plate; 11. Upper sensor; 12. Lower sensor; 13. Arc baffle; 14. Inner cylinder; 15. Storage hopper; 16. Crossbar; 17. Drop plate; 18. Upper connecting rod; 19. Hanging plate; 20. Translation cylinder; 21. Piston rod I. 22. Column; 23. Cantilever plate; 24. Base; 25. Lower connecting rod; 26. Pulling column; 27. Guide plate; 28. Guide groove; 29. ​​Pressing rod; 30. Horizontal guide groove; 31. Frame; 32. Molding outer cylinder limiting plate; 33. Conveyor belt; 34. Lifting rod; 35. Molding outer cylinder; 36. Servo motor; 37. Crank connecting rod; 38. Lower support plate; 39. Upper support plate; 40. Compacting cylinder; 41. Intermediate hopper; 42. Inclined support plate; 43. Support body; 44. Straight support plate; 45. Piston rod II; 46. Lifting cylinder; 47. Roller; 48. Upper clamping plate; 49. Side clamping plate; 50. Limiting plate. Detailed Implementation

[0011] Figure 1This is a schematic diagram of a conveying mechanism for filling the inner cylinder of fireworks. A support frame 5 with a hexagonal inner cavity is fitted onto the inner cylinder cake 1. The upper end of the support frame is connected to a lifting cylinder 3, which is mounted on a guide rail 2 via a pulley trolley. When the support frame slides to the middle hopper position, the pulley stops sliding, the lifting cylinder 3 operates, and the support frame, along with the inner cylinder, descends into the middle hopper (below the middle hopper is a storage hopper 15, with circular baffles 13 on both sides of the upper part of the storage hopper). Alternatively, a robotic arm can be used to lower the inner cylinder into the middle hopper. When the upper sensor 11 detects the inner cylinder position line (drop point 6), the support frame stops descending. The motor on the support frame drives the two support plates 4 at the lower end of the support frame to rotate synchronously relative to each other at 120 degrees, opening them into the rotated support plate 10 state. At this time, the lowest rotation line 7 of the support plate is formed. The inner cylinder 14 begins to fall from the drop point 6 into the middle hopper. The drop space between the drop point and the upper surface position line 8 of the uppermost inner cylinder in the middle hopper (the position of the lower sensor 12) is the working space 9. Since the support plate rotates and opens, the height of the working space is increased by the distance between the drop point 6 and the lowest rotation line 7 of the support plate. The increased distance is generally at least 50 mm (calculated based on a regular hexagonal inner cylinder cake with a minimum side length of 100 mm).

[0012] In the example, Figures 2-5In this process, a split-type conveying mechanism for filling the fireworks inner tube is mounted on the fireworks inner tube filling machine. It includes a storage hopper 15 for storing the inner tube and an intermediate hopper 41 connected to the upper middle part of the storage hopper for discharging the inner tube. Columns 22 are provided on both sides of the intermediate hopper. The upper ends of the columns are connected by crossbars 16, and the lower ends are fixed to the frame 31 at one end of the storage hopper via a base 24. A lifting rod 34 is movably mounted on the columns. Both ends of the lifting rod are fixedly connected to a translation cylinder 20 by hanging plates 19. A lifting cylinder 46 located on one side of the intermediate hopper has a piston rod II 45. The lifting rod is connected to a cantilever plate 23 via an upper connecting plate 18 and a lower connecting rod 25. The cantilever plate is connected to the piston rod II. The lifting cylinder drives the lifting rod to descend. The translation cylinder, bracket, and inner cylinder cake can descend together into the intermediate hopper. The intermediate hopper is equipped with opposing drop plates 17. The piston rod I21 of the translation cylinder 20 is fixedly equipped with a bracket body 43 that supports the inner cylinder and corresponds to the shape of the hexagonal inner cylinder cake. The cavity inside the bracket body is half a hexagon and is formed by a straight support plate 44 and an inclined support plate 42. The angle between the straight support plate 44 and the inclined support plate 42 is 120 degrees. The straight support plate is connected to the piston rod I21. The translation cylinder moves horizontally and synchronously inward to close the inclined support plate and support the inner cylinder cake 1 sent by the conveying mechanism into the drop plates 17. The translation cylinder moves horizontally and synchronously outward to separate the inclined support plate, allowing the inner cylinder to fall downward into the intermediate hopper.In addition to the aforementioned split-type conveying mechanism for the fireworks inner tube filling hopper in the fireworks inner tube filling machine, the fireworks inner tube filling machine also includes guide plates 27 spaced apart at the bottom of the storage hopper, forming a guide groove 28 between the guide plates to allow the inner tube to move in. A swaying column 26 is spaced apart on the storage hopper at the upper end of the guide plates, causing the surrounding inner tubes to roll and enter the guide groove. One end of the swaying column is connected to the upper arm plate, and the other end of the upper arm plate is connected to the swing plate via a swing rod. The swing plate is connected to the servo motor 36 via a crank rod 37. A steering body is provided at the lower end of the guide groove. The upper surface of the steering body has horizontal guide grooves 30 with an arc shape opposite to the opening of the guide groove (the horizontal guide groove can hold the inner tube). The outer side of the steering body has a cross-section that is smoothly connected to the horizontal guide groove. An arc-shaped vertical guide groove is connected to the firing holes on the molded outer cylinder 35 located on the conveyor belt. The inner cylinder filling machine can fill the inner cylinder into all the firing holes in the same row on one or more molded outer cylinders (three molded outer cylinders in parallel in this example) at one time. Since there are multiple rows of firing holes on one molded outer cylinder, multiple filling machines can be arranged side by side at intervals and the molded outer cylinders can be moved horizontally to the bottom of each filling machine multiple times to complete the filling of all the inner cylinders on the three molded outer cylinders. Alternatively, the filling of all the inner cylinders on the three molded outer cylinders can be completed by moving the three molded outer cylinders back and forth multiple times under the bottom of one filling machine. The molded outer cylinder 35 is input by the conveyor belt 33 supported by the roller 47. The two ends of the conveyor belt are the driving roller and the driven roller. The molded outer cylinder is positioned on the conveyor belt by the left and right and front and back of the molded outer cylinder limit plate 32 driven by the cylinder. An L-shaped pusher is provided on the guide rail on one side of the horizontal guide groove. Under the action of the pusher connected to the piston rod III on the pusher cylinder, the pusher can push the inner cylinder 14 that enters the horizontal guide groove 30 into the vertical guide groove 52. On the other side of the horizontal guide groove, there are pressure rods 29 connected to the pressure cylinder at intervals. The pressure cylinder is fixed on the upper back plate 39. The pressure rods are connected to the lower back plate 38. The lower back plate is connected to the pressure cylinder 40. The number and distribution of the pressure rods correspond to the number and position of the firing holes in the same row on the three molded outer cylinders. Under the action of the pressure cylinder 40, the pressure rods can push the inner cylinder that enters the vertical guide groove into the firing hole of the molded outer cylinder 35.

[0013] In this invention, the arc-shaped baffles 13 at the upper part of both ends of the storage hopper are designed as limiting plates 50. The limiting plates at the upper part of both ends of the storage hopper are made of elastic materials such as rubber and elastic bands. The limiting plates can always be close to the upper surface of the uppermost inner cylinder. When the inner cylinder moves upward, the limiting plates extend upward under the action of the inner cylinder. When the inner cylinder moves downward, the limiting plates retract under the action of elasticity, so that they can always be close to the uppermost inner cylinder, so that there is no gap between the uppermost inner cylinder and the arc-shaped baffles at the top of the storage hopper.

[0014] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any aspects not mentioned, such as PLC control, limit switches and displacement sensors in the automatic control device, are existing technologies. Although this utility model has been described in detail with reference to specific embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of protection of the claims of this utility model.

Claims

1. A split-type conveyor mechanism for filling fireworks inner tubes, which is mounted on a fireworks inner tube filling machine, characterized by: The split-type conveying mechanism for filling the inner cylinder of fireworks includes a storage hopper (15) for storing the inner cylinder (14) and an intermediate hopper (41) connected to the upper middle part of the storage hopper for discharging material from the inner cylinder. Columns (22) are provided on both sides of the intermediate hopper. The upper ends of the columns are connected by crossbars (16), and the lower ends are fixed to a frame (31) on one side of the storage hopper. A lifting rod (34) is movably mounted on the column. Both ends of the lifting rod are fixedly connected to a translation cylinder (20) by hanging plates (19). The lifting rod is connected to a lifting cylinder (46) located on one side of the intermediate hopper. The lifting cylinder drives the lifting rod to descend. The translation cylinder, the bracket body, and the inner cylinder cake are lowered together into the intermediate hopper. The intermediate hopper is equipped with opposite dropping plates (17). The translation cylinder is connected to the bracket body (43) that can support the inner cylinder cake and corresponds to the shape of the regular hexagonal inner cylinder cake. The inner cavity of the bracket body is half a regular hexagon and is formed by a straight support plate (44) and an inclined support plate (42). The translation cylinder moves horizontally and synchronously inward to close the inclined support plate and support the inner cylinder cake (1) sent by the conveying mechanism into the dropping plate. The translation cylinder moves horizontally and synchronously outward to separate the inclined support plate and allow the inner cylinder cake to fall into the intermediate hopper.

2. The split-type conveying mechanism for filling the inner tube of fireworks according to claim 1, characterized in that: The upper limit plates (50) at both ends of the storage hopper (15) are made of rubber and elastic material, and the limit plates can always be close to the upper surface of the uppermost inner cylinder (14).

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