Automatic filling machine for firework inner tube
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2026-08-11
AI Technical Summary
[0003]针对上述现有技术中下端两个支撑内筒的斜边能同步旋转打开的正六方形抱箍，在内筒落料时所存在的内筒轴线会发生横向偏移，导致有的内筒不能顺利地进入到导料槽中的问题，本实用新型提供了一种既能实现内筒自动输送、落料、分料和装填，又不会增加工作空间高度，下料内筒落位后其轴线与中间料斗内已有的内筒轴线能保持平行，下料内筒轴线不会发生横向偏移，能确保内筒顺利进入到导料槽中的烟花内筒自动装填机
[0007]本实用新型是在现有内筒装填机的基础上，一是通过装有下端开口的抱箍并能平移和下降的装置（或机械手）将正六方形的内筒饼输送到中间料斗内；二是通过改进支撑内筒的框架结构，使支撑内筒的托架板水平同步打开，将内筒落入在中间料斗内，由于托架板水平同移动就可使内筒落料，因而不需要增加内筒落料点与已在中间料斗的内筒上表面之间的工作空间高度，落料的内筒与中间料斗内已有的内筒上表面相碰时，内筒落料后其轴线与中间料斗内已有的内筒轴线能基本上保持平行，下料内筒轴线不会发生横向偏移，特别当内筒直径较低小时，能使内筒能顺利地进入到导料槽中；再是通过将贮料斗上的圆弧挡板改为用橡胶、伸缩带等弹性材料制成的能与内筒始终相靠近的伸缩的限贴板，当内筒向上移动时，限贴板在内筒作用下向上伸起，当内筒向下移动时，限贴板在弹性作用下收起，从而可始终与最上层的内筒相贴近，使最上层的内筒与贮料斗上部的圆弧挡板之间不会有间隙，有效地解决了内筒在贮料斗内上下移动时由于存在间隙而产生较大跳动，使其内筒轴线水平偏离，从而影响内筒进入导料槽的问题。
Smart Images
Figure CN224623625U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to fireworks manufacturing equipment, and in particular to mechanical equipment for automatically filling inner cylinders into the outer cylinders of molded fireworks. 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 working space must be reserved in 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 increased by at least half the length of the inclined side compared to the original working space height. Due to the increased height of the working space and the increased drop height of the inner cylinder, when the dropping inner cylinder collides with the upper surface of the existing inner cylinder in the intermediate hopper, the axis of some dropping inner cylinders will not remain parallel to the axis of the existing inner cylinders in the intermediate hopper after they are positioned. The axis of the dropping inner cylinder will shift laterally, causing some inner cylinders to fail to smoothly enter the guide chute. This is especially problematic 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 an automatic fireworks inner cylinder filling machine that can realize automatic inner cylinder conveying, feeding, distributing and filling without increasing the height of the working space. 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 can smoothly enter the guide chute.
[0004] The technical solution adopted by this utility model to solve the technical problem is: an automatic filling machine for fireworks inner tubes, which includes a storage hopper for storing inner tubes and an intermediate hopper connected to the upper middle part of the storage hopper for discharging inner tubes. Guide plates are spaced apart at the lower part of the storage hopper, and a guide groove is formed between the guide plates to allow the inner tubes to move in. A swaying column is spaced apart on the storage hopper at the upper end of the guide plates, which can cause the surrounding inner tubes to roll and enter the guide groove. A steering body is provided at the lower end of the guide groove. The upper surface of the steering body has arc-shaped horizontal guide grooves spaced apart, opposite to the opening of the guide groove. The outer side of the steering body has a vertical guide groove smoothly connected to the horizontal guide groove. The vertical guide groove is aligned with the firing hole on the molded outer tube located on the conveyor belt. A pusher is provided on the guide rail on one side of the horizontal guide groove. The pusher, under the action of a pushing cylinder, can push the inner tubes entering the horizontal guide groove into the vertical guide groove. A guide plate is spaced apart on the other side of the horizontal guide groove. The pressure rod, under the action of the pressure cylinder, pushes the inner cylinder, which has entered the vertical guide groove, into the launching hole. Columns are installed on both sides of the intermediate hopper. The upper ends of the columns are connected by crossbars, and the lower ends are fixed to the frame on one side of the storage hopper. A lifting rod is movably installed 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 drives the lifting rod to descend, allowing the translation cylinder, the support body, and the inner cylinder cake to descend together into the hopper. Inside the intermediate hopper, there are opposing dropping plates. The translation cylinder is connected to a bracket that supports the inner cylinder and corresponds to the shape of the hexagonal inner cylinder cake. The inner cavity of the bracket 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 to close the inclined support plate and support the inner cylinder cake sent by the conveying mechanism into the dropping plates. The translation cylinder moves horizontally and synchronously outward to separate the inclined support plate and allow the inner cylinder to drop downward into the intermediate hopper.
[0005] To further address the issue of gaps between the inner cylinders at both ends of the storage hopper during the operation of the lifting column, which allows the inner cylinders to float up and down with the column without leaving any gaps with the arc-shaped baffle at the top of the hopper, thus preventing excessive bouncing of the inner cylinders due to gaps and potential horizontal deviation of the inner cylinder axis, which would affect their entry into the guide chute, this invention replaces the arc-shaped baffle with a retractable limiting plate made of elastic materials such as rubber or a telescopic belt. This plate maintains constant 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, ensuring constant contact with the uppermost inner cylinder and eliminating any 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 with a clamp (the clamp is formed by an upper clamping plate 54 with an inverted V-shape at a 120-degree angle and side clamping plates 55 that are movably connected to both ends of the upper clamping plate; the angle between the side clamping plates and the upper clamping plate is 120 degrees; the lower end of the clamp is open; 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 into the bracket body, which is formed by two symmetrical straight support plates and an inclined support plate, in a semi-hexagonal shape. The position signal obtained by the upper sensor is activated. The lifting cylinder lowers the translation cylinder, bracket, and inner cylinder cake 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 synchronously, so that the inner cylinder supported on the bracket falls quickly 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 to simultaneously move the inner cylinder placed in the horizontal guide groove into 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 within the lower rotating and opening support frame in the existing technology. Figure 2 This is a schematic diagram of the main structure of this utility model. Figure 3 yes Figure 2 EE cross-sectional structural diagram, Figure 4 This is a schematic diagram of the structure along direction A of the figure.
[0010] In the diagram: 1. Inner cylinder cake; 2. Guide rail; 3. Lifting cylinder; 4. Support plate; 5. Support frame; 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. 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 arm plate; 19. Hanging plate; 20. Translation cylinder; 21. Piston rod I. 22. Column; 23. Swing plate; 24. Base; 25. Swing 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 rod; 38. Lower support plate; 39. Upper support plate; 40. Pressing 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. Push rod; 49. Piston rod III; 50. Pushing cylinder; 51. Push head; 52. Vertical guide groove; 53. Ejection hole; 54. Upper clamping plate; 55. Side clamping plate; 56. Limiting plate. Detailed Implementation
[0011] exist Figure 1 middle, Figure 1This is a schematic diagram of the existing fireworks inner tube filling conveying structure. A support frame 5 with a hexagonal inner cavity is fitted onto the inner tube 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 tube, 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). When the upper sensor 11 detects the inner tube position line (drop point 6), the support frame stops descending. At this time, the electric current on the support frame... The machine's operation drives the two support plates 4 at the lower end of the support frame, which are at 120 degrees, to rotate synchronously and open into the rotated support plate 10, which becomes the lowest rotation line 7 of the support plate. The inner cylinder 14 then falls from the drop point 6 into the intermediate hopper. The space between the drop point and the upper surface position line 8 of the uppermost inner cylinder in the intermediate hopper (position of the lower sensor 12) is the working space 9. 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 due to the rotation and opening 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 2-4The automatic filling machine for fireworks inner tubes includes a storage hopper 15 for storing inner tubes and an intermediate hopper 41 connected to the upper middle part of the storage hopper for discharging inner tubes. Guide plates 27 are spaced apart at the bottom of the storage hopper, forming guide grooves 28 between the guide plates that allow the inner tubes to move into the guide grooves. A swaying column 26 is spaced apart on the storage hopper above the guide plates, allowing the surrounding inner tubes to move and enter the guide grooves. One end of the swaying column is connected to an upper arm plate 18, and one end of the upper arm plate is connected to a swing plate 23 via a swing rod 25. The swing plate is connected to a 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-shaped cross-section, opposite to the opening of the guide groove (the horizontal guide grooves allow the inner tubes to move within them). The outer side of the steering body has a smooth surface that corresponds to the horizontal guide grooves. The vertical guide groove 52 with a circular arc cross-section is connected to the firing hole 53 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 (in this embodiment, three molded outer cylinders are filled in parallel) 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 left and right on the conveyor belt by the molded outer cylinder limiting plate 32 driven by the cylinder.An L-shaped pusher 51 is installed on the guide rail on one side of the horizontal guide groove. Under the action of the push rod 48 connected to the piston rod Ⅲ49 on the pushing cylinder 50, the pusher can push the inner cylinder 14 that has entered 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 40 at intervals. The pressure cylinder is fixed on the upper arm plate 39, and the upper end of the pressure rod is connected to the lower arm plate 38. The lower arm plate is connected to the pressure cylinder 40. The cylinders 40 are connected, and the number and distribution of the pressure rods correspond to the number and position of the firing holes in the same row when the three molded outer cylinders are arranged side by side. Under the action of the pressure cylinders 40, the pressure rods can push the inner cylinder that has entered the vertical guide groove into the firing hole 35. Columns 22 are provided on both sides of the intermediate hopper. The upper end of the column is connected by a crossbar 16, and the lower end is fixed to the frame 31 at one end of the storage hopper via a base 24. Lifting rods 34 are movably installed on the columns. The end plate 19 is fixedly connected to the translation cylinder 20. The lifting rod is connected to the lifting cylinder 46 located on one side of the intermediate hopper through the piston rod II 45. The lifting cylinder drives the lifting rod to descend, so that the translation cylinder, the bracket and the inner cylinder cake can descend together into the intermediate hopper. The intermediate hopper is provided with a corresponding dropping plate 17. The piston rod I 21 of the translation cylinder 20 is fixedly provided with a bracket body 43 that can support 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 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 I 21. The translation cylinder moves horizontally and synchronously inward, so that the inclined support plate closes and supports the inner cylinder cake 1 sent by the conveying mechanism into the dropping plate 17. The translation cylinder moves horizontally and synchronously outward, so that the inclined support plate separates and the inner cylinder falls downward into the intermediate hopper.
[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 56. 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. An automatic filling machine for fireworks inner tubes, comprising a storage hopper (15) for storing inner tubes (14) and an intermediate hopper (41) connected to the upper middle part of the storage hopper for discharging material into the inner tubes. The lower part of the storage hopper is provided with guide plates (27) spaced apart, and a guide groove (28) is formed between the guide plates to allow the inner tubes to move into it. The storage hopper at the upper end of the guide plates is provided with movable left and right moving prying columns (26) spaced apart, which can cause the inner tubes around them to roll and enter the guide groove. The lower end of the guide groove is provided with a steering body, and the upper surface of the steering body has arcs spaced apart opposite to the opening of the guide groove. The horizontal guide groove (30) has an arc-shaped vertical guide groove (52) on the outer side of the outer part of the rotating body that is smoothly connected to the horizontal guide groove. The vertical guide groove is opposite to the firing hole (53) on the molding outer cylinder (35) located on the conveyor belt (33). A pusher (51) is provided on one side of the horizontal guide groove. Under the action of the pusher cylinder (50), the pusher can push the inner cylinder entering the horizontal guide groove into the vertical guide groove. A pressure rod (29) is provided at intervals on the other side of the horizontal guide groove. Under the action of the pressure rod cylinder (40), the pressure rod can push the inner cylinder entering the vertical guide groove into the firing hole. Its characteristic is: The intermediate hopper is provided with columns (22) on both sides. The upper end of the columns is connected by a crossbar (16), and the lower end is fixed to the frame (31) on one side of the storage hopper. A lifting rod (34) is movably provided on the column. The two ends of the lifting rod are fixedly connected to the translation cylinder (20) by the hanging plate (19). The lifting rod is connected to the lifting cylinder (46) located on one side of the intermediate hopper. The lifting cylinder drives the lifting rod to descend, so that the translation cylinder, the bracket body and the inner cylinder cake can descend together into the intermediate hopper. The intermediate hopper is provided with There are corresponding drop plates (17). The translation cylinder is connected to a bracket (43) that can support the inner cylinder and corresponds to the shape of the hexagonal inner cylinder cake. The cavity inside the bracket is half a 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 sent by the conveying mechanism into the drop plate. The translation cylinder moves horizontally and synchronously outward to separate the inclined support plate and allow the inner cylinder to drop into the intermediate hopper.
2. The automatic filling machine for fireworks inner tubes according to claim 1, characterized in that: The upper limit plates (56) 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).