Powder mixing device of firework inner cylinder
By designing a fireworks inner tube mixing device with a perforated top cover, and using a flipping drive mechanism to achieve uniform mixing of oxidant, reducing agent and bright beads, the problems of uneven mixing and high energy consumption are solved, and the mixing efficiency and safety are improved. It is suitable for the production of highly sensitive pyrotechnics.
Patent Information
- Application Number
- CN202520519826.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-21
AI Technical Summary
During the production of fireworks inner tubes, the oxidant, reducing agent and bright beads are mixed unevenly. The traditional shaking method is energy-intensive, noisy and inefficient, and the mixing effect is not ideal.
Design a powder mixing device for the inner tube of fireworks. The device uses a top cover with concave holes to connect with the inner tube of fireworks. A flipping drive mechanism makes the powder flow back and forth between the top cover and the inner tube, increasing the mixing space and controlling the number of flips and the angle. An antistatic coating is used to reduce powder adhesion.
It achieves uniform mixing of pharmaceutical powder, reduces equipment energy consumption and noise, improves mixing efficiency, enhances safety, simplifies equipment structure, and facilitates automated control.
Smart Images
Figure CN223896700U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of fireworks manufacturing equipment technology, and in particular relates to a powder mixing device for the inner tube of fireworks. Background Technology
[0002] During the production of fireworks inner tubes, after the bright beads and the mixed explosive powder (composed of oxidizer and reducing agent) are loaded into the fireworks inner tube, the inner tube needs to be shaken to mix the bright beads and explosive powder as evenly as possible. This results in a large amount of explosive powder being mixed in advance, and there are risks involved in the mixing, transportation, storage and loading of the explosive powder.
[0003] To make the production of fireworks inner tubes safer, the process was improved by not mixing the oxidizer and reducing agent in advance, but adding them to the fireworks inner tube in two separate batches, and then mixing them inside the inner tube. This eliminates the need for pre-mixing the explosives, but it also brings new challenges: how to ensure that the oxidizer, reducing agent, and brightening agent are evenly mixed inside the inner tube.
[0004] Typically, the opening of the fireworks' inner tube, filled with bright beads, oxidizer, and reducing agent, is plugged manually or using equipment. The inner tube is then shaken to mix the bright beads and explosive charge. The main reason for the poor mixing effect of this shaking method is that the remaining space in the inner tube after loading the explosives is small. When shaking, the movement space of the powder and bright beads within the inner tube is limited. To mix them well, a large acceleration and repeated shaking are required, usually dozens of times. This results in large movements, high energy consumption, high noise, low mixing efficiency, and unsatisfactory mixing results. Utility Model Content
[0005] To overcome the problems existing in related technologies, the technical solution of this application aims to provide a powder mixing device for the inner tube of fireworks, including...
[0006] A mounting bracket for securing the inner tube of fireworks, the mounting bracket being rotatably mounted on the frame;
[0007] The upper cover is provided on the fixed frame, and the upper cover is provided with a recessed hole corresponding to the opening end of the inner tube of the firework. When the upper cover is detachably closed to the opening end of the inner tube of the firework, the opening of the recessed hole is sealed and connected with the opening end of the inner tube of the firework.
[0008] A flipping drive mechanism is used to drive the fixing frame and thereby cause the top cover and the inner tube of the firework to flip, so that the powder flows back and forth between the concave hole of the top cover and the inner tube of the firework during the flipping process.
[0009] The technical effect of the above solution is that a cover with a concave hole is placed on the inner tube of the firework, so that the concave hole on the cover and the inner tube of the firework are connected, which increases the usable space for mixing. Then, the cover and the inner tube of the firework are flipped over, so that the powder flows into the concave hole of the cover and then flows back into the inner tube of the firework. Repeating this several times can achieve a better mixing effect.
[0010] In one or more embodiments of the above technical solution, the opening of the concave hole is provided with a protruding protrusion, the outer diameter of the protrusion is equivalent to the inner diameter of the firework inner tube, so that the protrusion can be inserted into the opening end of the firework inner tube.
[0011] In one or more embodiments of the above technical solution, the end face of the protrusion is provided with an outward guiding surface, and the protrusion is guided to be inserted into the opening end of the inner tube of the firework through the guiding surface.
[0012] In one or more embodiments of the above technical solution, the inner wall surface of the concave hole is coated with an antistatic coating, which is used to reduce the adhesion of drug powder.
[0013] In one or more embodiments of the above technical solution, the number of the recessed holes is multiple, and the multiple recessed holes are symmetrically and uniformly distributed.
[0014] In one or more embodiments of the above technical solution, the fixing frame includes a base plate, side plates and a top plate. Side plates are installed on opposite sides of the base plate, and the top plate is connected to the two side plates. The side plates are mounted on the frame via a rotating shaft, and the rotating shaft is connected to the flipping drive mechanism. The base plate is used to place the inner tube of the fireworks, and the top cover is movably mounted on the top plate.
[0015] In one or more embodiments of the above technical solution, the fixing frame further includes a left clamping plate and a right clamping plate, the left clamping plate and the right clamping plate being respectively connected to the two ends of the double-outlet cylinder, the double-outlet cylinder being disposed on the base plate, and being used to drive the left clamping plate and the right clamping plate to move closer to each other to clamp and fix the inner tube of the fireworks.
[0016] In one or more embodiments of the above technical solution, the top plate is provided with a plurality of sliding holes and corresponding sliding sleeves, and the upper end of the top cover is provided with a plurality of sliding rods corresponding to the sliding holes, the sliding rods passing through the sliding holes and the sliding sleeves;
[0017] The top plate is also equipped with a drive cylinder. The connecting rod of the drive cylinder is connected to the top cover. The drive cylinder is used to drive the top cover to move so that the top cover can be detachably closed to the opening end of the firework inner tube.
[0018] In one or more embodiments of the above technical solution, the flipping drive mechanism includes a motor and a reducer, the reducer is mounted on the frame, the motor is connected to the reducer, and the reducer is connected to the rotating shaft of the fixed frame.
[0019] In one or more embodiments of the above technical solution, the flipping drive mechanism further includes a controller, which is configured to control the number of flips to be 3-5 times, with each flipping angle being 150-180 degrees.
[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0021] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0022] Figure 1 This is a three-dimensional structural schematic diagram of a powder mixing device shown in one embodiment of this application.
[0023] Figure 2 This is a front structural schematic diagram of a powder mixing device shown in one embodiment of this application.
[0024] Figure 3 This is a schematic diagram of the exploded structure of a powder mixing device shown in one embodiment of this application.
[0025] Figure 4 This is a schematic diagram of the structure of the top cover shown in one embodiment of this application.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1-Firework inner tube; 2-Fixing frame; 21-Base plate; 22-Side plate; 23-Top plate; 231-Sliding hole; 24-Rotating shaft; 25-Left clamping plate; 26-Right clamping plate; 27-Double-outlet cylinder; 3-Top cover; 31-Concave hole; 32-Protrusion; 4-Tilting drive mechanism; 41-Motor; 42-Reducer; 5-Frame; 6-Sliding sleeve; 7-Sliding rod; 8-Drive cylinder. Detailed Implementation
[0028] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.
[0030] like Figures 1 to 4 As shown in the figure, this embodiment provides a powder mixing device for a firework inner tube 1, including a fixing frame 2 for fixing the firework inner tube 1, an upper cover 3 disposed on the fixing frame 2, and a flipping drive mechanism 4. The fixing frame 2 is rotatably mounted on a frame 5. The upper cover 3 is provided with a recess 31 corresponding to the open end of the firework inner tube 1. When the upper cover 3 is detachably closed to the open end of the firework inner tube 1, the opening of the recess 31 is sealed and connected with the open end of the firework inner tube 1. The flipping drive mechanism 4 is used to drive the fixing frame 2 and thereby drive the upper cover 3 and the firework inner tube 1 to flip, so that the powder flows back and forth between the recess 31 of the upper cover 3 and the firework inner tube 1 during the flipping process.
[0031] In this way, a cover 3 with a concave hole 31 is placed on the inner tube of the firework, so that the concave hole 31 on the cover 3 and the inner tube of the firework are connected, increasing the available space for mixing. Then, the cover 3 and the inner tube of the firework are flipped over, so that the powder flows into the concave hole 31 of the cover 3 and then flows back into the inner tube of the firework. Repeating this several times can achieve a better mixing effect.
[0032] In this embodiment, the opening of the concave hole 31 is provided with a protruding protrusion 32. The outer diameter of the protrusion 32 is approximately equal to the inner diameter of the inner tube 1 of the firework, so that the protrusion 32 can be inserted into the opening end of the inner tube 1 of the firework. The end face of the protrusion 32 is provided with an outward guiding surface, and the protrusion 32 is guided to be inserted into the opening end of the inner tube 1 of the firework through the guiding surface.
[0033] Thus, the protrusion 32 can be inserted into the inner tube 1 of the fireworks, ensuring a good connection between the recess 31 of the top cover 3 and the inner tube 1 of the fireworks. The protrusion 32 allows the powder in the recess 31 to flow back into the inner tube 1 of the fireworks, avoiding powder residue at the connection point. The protrusion 32 also plays a role in connecting and stabilizing, preventing it from falling off when flipped.
[0034] In this embodiment, the inner wall surface of the concave hole 31 is coated with an antistatic coating to reduce the adhesion of the powder. Similarly, the inner wall of the fireworks inner tube 1 is also coated with an antistatic coating to increase safety.
[0035] In this embodiment, there are multiple recesses 31, which are symmetrically and evenly distributed. The number of recesses 31 can be selected according to actual production needs. The shape of the recesses 31 is cylindrical, and the bottom and side surfaces can be chamfered with arc surfaces. Of course, the bottom surface of the recesses 31 can also be designed as a hemispherical shape, etc., all of which can avoid powder residue.
[0036] In this embodiment, the fixing frame 2 includes a base plate 21, side plates 22 and a top plate 23. Side plates 22 are installed on both sides of the base plate 21. The top plate 23 is connected to the two side plates 22. The two side plates 22 are mounted on a frame 5 via a rotating shaft 24. A bearing is provided between the rotating shaft 24 and the frame 5 to reduce friction. The rotating shaft 24 is connected to the flipping drive mechanism 4 for transmission. The flipping drive mechanism 4 flips the fixing frame 2 via the rotating shaft 24.
[0037] The base plate 21 is used to place the inner tube 1 of the fireworks. The upper cover 3 is movably mounted on the top plate 23. The side of the upper cover 3 with the recessed hole 31 is opposite to the base plate 21. The inner tube 1 of the fireworks is clamped between the upper cover 3 and the base plate 21. In order to position the inner tube 1 on the side, the fixing frame 2 also includes a left clamping plate 25 and a right clamping plate 26. The left clamping plate 25 and the right clamping plate 26 are respectively connected to the two ends of the double-outlet cylinder 27. The double-outlet cylinder 27 is mounted on the base plate 21. The double-outlet cylinder 27 is used to drive the left clamping plate 25 and the right clamping plate 26 to move closer to each other to clamp and fix the inner tube 1 of the fireworks. The left clamping plate 25 and the right clamping plate 26 are connected to the base plate 21 through a slide rail component to ensure the stability of the movement of the left clamping plate 25 and the right clamping plate 26.
[0038] In this embodiment, the top plate 23 is provided with a plurality of sliding holes 231 and corresponding sliding sleeves 6. The upper end of the upper cover 3 is fixedly provided with a plurality of sliding rods 7 corresponding to the sliding holes 231. The sliding rods 7 pass through the sliding holes 231 and the sliding sleeves 6. Exemplarily, the number of sliding holes 231, sliding sleeves 6 and sliding rods 7 is four. In this way, the upper cover 3 can move relative to the top plate 23, so that the upper cover 3 moves away from or closer to the bottom plate 21.
[0039] In order to drive the movement of the upper cover 3, a drive cylinder 8 is also provided on the top plate 23. The connecting rod of the drive cylinder 8 is connected to the upper cover 3. The drive cylinder 8 is used to drive the upper cover 3 to move so that the upper cover 3 can be detachably closed to the opening end of the firework inner tube 1 located on the bottom plate 21.
[0040] In this embodiment, the flipping drive mechanism 4 includes a motor 41 and a reducer 42. The reducer 42 is mounted on the frame 5. The motor 41 is connected to the reducer 42, and the reducer 42 is connected to the rotating shaft 24 of the fixed frame 2. Thus, the motor 41 drives the rotating shaft 24 to rotate through the reducer 42, thereby achieving the flipping of the fixed frame 2.
[0041] The flipping drive mechanism 4 also includes a controller, which is not shown in the figure. The controller is electrically connected to the motor 41 and is used to control the motor 41. The controller is configured to control the number of flips to be 3-5 times, and the flipping angle is 150-180 degrees each time. The flipping angle is only required to allow the powder to flow. For example, the flipping angle is 180° each time.
[0042] The working process of the powder mixing device in the inner tube 1 of the fireworks in this embodiment is as follows:
[0043] First, the oxidant, reducing agent, and bright beads are sequentially loaded into the inner tube 1 of the fireworks. The fixing frame 2 rotates to the bottom plate 21 and becomes horizontal. The driving cylinder 8 drives the upper cover 3 to move upward, placing the inner tube 1 of the fireworks on the bottom plate 21. The left clamping plate 25 and the right clamping plate 26 clamp the inner tube 1 of the fireworks and position it under the drive of the double-outlet cylinder 27. The driving cylinder 8 drives the upper cover 3 to move downward, and the upper cover 3 closes on the inner tube 1 of the fireworks. The rotating driving mechanism 4 drives the fixing frame 2, the upper cover 3, and the inner tube 1 of the fireworks to rotate as a whole, so that the powder flows and mixes multiple times.
[0044] The powder mixing device in the inner tube 1 of the fireworks in this embodiment achieves technological breakthroughs in three dimensions: safety, efficiency, and mixing quality through physical space expansion and a controllable flipping mechanism. It is particularly suitable for mixing high-sensitivity pyrotechnics and has the following advantages:
[0045] 1. Improved mixing uniformity. By alternating the rotation of the upper cover 3 with concave holes 31 and the inner tube 1 of the fireworks, the powder and bright beads can generate more space exchange during the flow process, overcoming the problem of limited movement caused by the small remaining space in the traditional shaking action, and significantly improving the mixing uniformity of oxidant, reducing agent and bright beads.
[0046] 2. Reduced energy consumption and noise. Traditional shaking requires high-acceleration reciprocating motion, while the flipping action of this device only requires a small mechanical movement to complete the transfer of powder, greatly reducing the energy consumption and mechanical vibration noise required for equipment operation.
[0047] 3. Improve mixing efficiency. The powder transfer path of the flipping action is more direct. Compared with the random movement of manual or mechanical shaking, the target mixing effect can be achieved with a controllable number of flips (such as 3-5 times), shortening the mixing time per cycle.
[0048] 4. Enhance process safety. Reducing violent mechanical movement lowers the risk of accidental combustion and explosion caused by friction or collision, while also eliminating the need for storage and transportation of pre-mixed explosives, further meeting the requirements for safe production.
[0049] 5. Simplified equipment structure. The flipping drive mechanism 4 is easier to automate than traditional high-precision shaking equipment, and the upper cover 3 with concave holes 31 has a simple structural design, making it easy to integrate into existing production lines and reducing modification costs.
[0050] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A powder mixing device for a fireworks inner tube (1), characterized in that, include A fixing frame (2) for fixing the inner tube (1) of the fireworks, the fixing frame (2) being rotatably mounted on the frame (5); The upper cover (3) is provided on the fixed frame (2), and the upper cover (3) is provided with a recess (31) corresponding to the opening end of the inner tube of the firework (1). When the upper cover (3) is detachably covered with the opening end of the inner tube of the firework (1), the opening of the recess (31) is sealed and connected with the opening end of the inner tube of the firework (1). The flipping drive mechanism (4) is used to drive the fixing frame (2) and thereby drive the upper cover (3) and the inner tube of the firework (1) to flip, so that the powder flows back and forth between the concave hole (31) of the upper cover (3) and the inner tube of the firework (1) during the flipping process.
2. The powder mixing device for the inner tube (1) of fireworks according to claim 1, characterized in that, The opening of the concave hole (31) is provided with a protruding protrusion (32), the outer diameter of which is equivalent to the inner diameter of the inner tube (1) of the fireworks, so that the protrusion (32) can be inserted into the opening end of the inner tube (1) of the fireworks.
3. The powder mixing device for the inner tube (1) of fireworks according to claim 2, characterized in that, The end face of the protrusion (32) is provided with an outward guiding surface, and the protrusion (32) is guided to be inserted into the opening end of the inner tube (1) of the fireworks through the guiding surface.
4. The powder mixing device for the inner tube (1) of fireworks according to claim 1, characterized in that, The inner wall surface of the recess (31) is coated with an antistatic coating, which is used to reduce the adhesion of the powder.
5. The powder mixing device for the inner tube (1) of fireworks according to claim 1, characterized in that, The number of the recesses (31) is multiple, and the multiple recesses (31) are symmetrically and evenly distributed.
6. The powder mixing device for the inner tube (1) of fireworks according to claim 1, characterized in that, The fixed frame (2) includes a base plate (21), side plates (22) and a top plate (23). Side plates (22) are installed on both sides of the base plate (21). The top plate (23) is connected to the two side plates (22). The frame (5) is mounted on the side plates (22) via a rotating shaft. The rotating shaft is connected to the flipping drive mechanism (4). The base plate (21) is used to place the inner tube (1) of the fireworks. The top cover (3) is movably mounted on the top plate (23).
7. The powder mixing device for the inner tube (1) of fireworks according to claim 6, characterized in that, The fixing frame (2) also includes a left clamping plate (25) and a right clamping plate (26). The left clamping plate (25) and the right clamping plate (26) are respectively connected to the two ends of the double-outlet cylinder. The double-outlet cylinder is located on the base plate (21) and is used to drive the left clamping plate (25) and the right clamping plate (26) to move closer to each other to clamp and fix the inner tube of the firework (1).
8. The powder mixing device for the inner tube (1) of fireworks according to claim 6, characterized in that, The top plate (23) is provided with multiple sliding holes and corresponding sliding sleeves. The upper end of the upper cover (3) is provided with multiple sliding rods corresponding to the sliding holes. The sliding rods pass through the sliding holes and the sliding sleeves. The top plate (23) is also provided with a driving cylinder. The connecting rod of the driving cylinder is connected to the upper cover (3). The driving cylinder is used to drive the upper cover (3) to move so that the upper cover (3) can be detachably closed to the opening end of the fireworks inner tube (1).
9. The powder mixing device for the inner tube (1) of fireworks according to claim 1, characterized in that, The flipping drive mechanism (4) includes a motor (41) and a reducer (42). The reducer (42) is mounted on the frame (5). The motor (41) is connected to the reducer (42). The reducer (42) is connected to the rotating shaft (24) of the fixed frame (2).
10. The powder mixing device for the inner tube (1) of fireworks according to claim 9, characterized in that, The flipping drive mechanism (4) also includes a controller, which is configured to control the number of flips to be 3-5 times, with each flip angle being 150-180 degrees.