High-safety automatic filling production process for combined firework inner barrels

Abstract

The invention relates to the technical field of firework production, and solves the problems that a firework inner barrel charging method in the market is troublesome in operation after uniform premixing and then charging, the dust concentration in the production process is relatively high, the mounting smoothness is low, a lot of residual powder is left in a charging area, and the detonation risk and the danger level of a production place are increased. The high-safety automatic filling production process for the combined firework inner barrels comprises the following steps in sequence: filling anti-blocking effect beads; separately filling a reducing agent and an oxidizing agent in a time-sharing manner; mixing in the cylinder: uniformly mixing the effect beads, the reducing agent and the oxidizing agent by adopting a high-speed rotating mechanical structure; and packaging is stable. The machine has the advantages that high-risk manual procedures which easily cause accidents are concentrated under an effective barrier and are completed through mechanical actions through automatic and mechanical bright bead filling, explosive filling, sawdust filling and sealing procedures, and the machine is small in dust, small in loss and high in safety coefficient.

Description

Technical Field

[0001] The present invention relates to the technical field of fireworks production, and in particular to a high-safety automatic filling production process for inner tubes of combined fireworks. Background Art

[0002] The existing methods for loading fireworks inner tubes on the market have the following problems: first, the explosives must be pre-mixed and then loaded into the inner tube, which is cumbersome to operate. In addition, the mixed explosives generate a high concentration of dust during the loading process, and the effect beads easily form bridges and arches in the metering holes, affecting the smooth filling process; there is a lot of residual explosives in the loading area; based on the above problems, an accident at a workstation or link in the existing fireworks inner tube loading production line will cause damage to the entire production line. Summary of the Invention

[0003] The present invention aims to solve the problems of the existing method of loading fireworks inner tubes on the market, such as the troublesome operation of pre-mixing and then loading, the high dust concentration during the production process, the low installation smoothness, the large amount of residual powder in the loading area, and the increased risk of explosion and danger level in the production site. A high-safety automatic loading production process for combined fireworks inner tubes is provided.

[0004] To solve the above technical problems, the present invention provides a technical solution: a high-safety automatic filling production process for combined fireworks inner tubes, comprising the following steps in sequence:

[0005] (a) Anti-blocking effect bead filling: The paper inner tube is quantitatively filled with fireworks effect beads through the anti-blocking structure;

[0006] (b) Isolated redox agent packaging: A physically isolated dual-channel system is used to independently load the reducing agent and oxidizing agent at different times;

[0007] (c) Mixing in the barrel: Using a high-speed rotating mechanical structure, the inner barrel filled in step (b) is conveyed to the mixing station via a belt to uniformly mix the effect beads, reducing agent, and oxidizing agent;

[0008] (d) Stable packaging: Wood powder and sealing powder are layered into the mixed paper inner tube to complete the sealing.

[0009] Furthermore, in step (a), the fireworks effect beads are loaded through an anti-blocking structure, and the anti-blocking structure includes:

[0010] Gate opening and closing mechanism: A servo motor-driven curved gate controls the flow of beads with intermittent opening and closing, with the opening and closing frequency synchronized with the production line beat. A three-dimensional flow-guiding quantitative guide tube: The inner wall is coated with ultra-smooth polytetrafluoroethylene, and a centrifugal disperser is installed at the end of the tube to ensure that the beads fall into the paper inner tube in a directional and evenly distributed manner.

[0011] Among them, the arc gate driven by the servo motor controls the flow through precise intermittent opening and closing to avoid accumulation and blockage of bright beads, and is synchronized with the production line rhythm to ensure the stability of continuous production. The centrifugal disperser forces the bright beads to diffuse in a directional manner, ensuring uniform distribution in the inner cylinder and avoiding fluctuations in combustion performance caused by local concentration.

[0012] Furthermore, the independent loading of the reducing agent and the oxidizing agent in step (b) is specifically implemented as follows:

[0013] Dual-channel time-sharing control system:

[0014] The first material channel (oxidant): uses a precision vibrating feeder protected by nitrogen, and an electrostatic elimination ring is installed at the outlet;

[0015] Second material channel (reducing agent): uses a constant temperature screw feeder and an integrated cooling jacket on the barrel wall;

[0016] The two-channel loading operation is controlled by PLC in a time-sharing manner. A compressed air curtain isolation zone is set between the channels to prevent cross contamination. The loading volume is fed back in real time by a high-precision strain gauge load cell.

[0017] Among them, dual-channel time-sharing control plus air curtain isolation physically isolates the contact path between the oxidant and the reducing agent. The compressed air curtain forms a dynamic barrier to prevent spontaneous reactions caused by cross contamination. The nitrogen protection vibrating feeder can suppress the risk of combustion and explosion of the oxidant during transportation.

[0018] Furthermore, the automatic filling production line for fireworks inner tubes includes:

[0019] Safety isolation unit: Explosion-resistant concrete walls with a thickness of 240-380mm are installed between workstations; material transmission channels are equipped with dual redundant fire dampers and linked temperature / spark monitoring sensors;

[0020] Mixing station in the drum: The inner drum is compacted and sealed by the station cover, and the motor is used as the power to drive the rotating shaft to make the entire mixing station rotate eccentrically at high speed, so that the filling material in the inner drum forms a circulation operation in the inner drum;

[0021] Unitized quantitative control module: Each workstation is equipped with an independent weighing feedback system to accurately control the error of single-barrel charging amount;

[0022] Sealing agent filling station and sealing agent compacting station.

[0023] The advantages of the present invention are:

[0024] 1. The gate is opened and closed, and the quantitative guide tube is filled in an orderly manner to solve the problem of bright beads bridging in the quantitative hole and arching without material discharge, and to achieve the accuracy of material filling ratio;

[0025] 2. The fireworks production hazardous materials are respectively loaded with single element materials in sequence, and then the drug is rapidly mixed in the inner cylinder, replacing the traditional explosive pre-mixed uniform and then loaded into the inner cylinder, to improve the intrinsic safety level of fireworks production;

[0026] 3. The oxidizing agent and reducing agent are separately loaded with quantitative volume, with small dust, small loss and high safety factor;

[0027] 4. The advanced process of unit material control, quantitative supply and on-demand loading is adopted in each process to ensure the minimum unit dosage, accurate formula, sufficient mixing and good effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the work station distribution structure diagram of the present application.

[0029] Figure 2 is the control principle diagram of the present application. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Combined with the accompanying Figure 1 , Figure 2 , a high safety combined fireworks inner cylinder automatic loading production process comprises the following steps:

[0032] Step (a): Anti-blocking effect bead loading: the arc-shaped gate is intermittently opened and closed to control the flow of bright beads, and the centrifugal disperser is used to realize uniform distribution of beads;

[0033] Step (b) Isolated oxidizing and reducing agent sub-packaging: through double-channel time control and air curtain isolation, the oxidizing agent and the reducing agent are physically isolated from contact;

[0034] Step (c) In-cylinder mixing: a high-speed rotating mechanical structure is used to uniformly mix the effect beads, reducing agent and oxidizing agent;

[0035] Step (d) Stable packaging: the sealing agent loading station and the sealing agent compacting station are respectively loaded with wood powder and sealing powder and complete sealing.

[0036] The specific steps are as follows, step (a) the fireworks effect beads fall from the storage bin to the servo motor driven arc-shaped gate (opening and closing stroke 20mm), the gate is opened and closed at a frequency of 0.3s / time to release the bright beads;

[0037] The bright beads enter the three-dimensional flow guide quantitative guide pipe (the inner wall is coated with polytetrafluoroethylene with a friction coefficient ≤0.05), and are diffused radially under the action of the end centrifugal disperser (diameter 30mm, rotating speed 2500rpm), and then uniformly fall into the paper inner cylinder of the fireworks.

[0038] Step (b) Isolated redox agent packaging, oxidant channel: potassium nitrate is delivered through a nitrogen-protected vibrating feeder (nitrogen flow rate 5 L / min); a high-voltage static elimination ring (discharge voltage -4.5 kV) is installed at the outlet;

[0039] Reducing agent channel: Aluminum-magnesium alloy powder is transported by a constant temperature screw feeder (jacket cooling water temperature 12°C); PLC controls the time-sharing action of the two channels (interval 2.0s), and a compressed air curtain is sprayed below the filling port. The filling amount is monitored in real time by a weighing sensor. Step (c) The inner cylinder is compacted and sealed by the station cover, and the motor is used as the power to drive the rotating shaft to make the entire mixing station rotate eccentrically at high speed, so that the inner cylinder filling material forms a circulation operation in the inner cylinder, so that the effect beads, reducing agent, and oxidizing agent are evenly mixed to achieve a mixing effect that meets the product design requirements. The mixing rotation time is set according to the different process requirements of the product and the time parameters are adjusted in the equipment control system;

[0040] The antistatic coating (carbon nanotube modified epoxy resin) on the outer wall of the inner tube conducts away triboelectric charges.

[0041] Step (d) Stable packaging: first fill in pine wood powder (80 mesh, filling height is 2 / 3 of the inner tube); cover with bentonite-based sealing powder, compact with mechanical pressure head, and end after verifying the packaging density (porosity ≤ 2.5%).

[0042] Implementation Case 1 (Automatic Production Line)

[0043] Combined with attachment Figure 1 , the workstation sequence layout is as follows:

[0044] Effect bead filling station → oxidant filling station → reducing agent filling station → barrel mixing station → sealing agent filling station → sealing agent compacting station;

[0045] Isolation unit distribution:

[0046] Each workstation has an independent isolation cabin; explosion-resistant concrete walls are installed between adjacent workstations with a spacing of 300mm (with threaded steel mesh built into the wall); dual redundant fire dampers are installed in the passages between the walls;

[0047] The hardware configuration of the weighing feedback system is as follows:

[0048] Sensor: strain gauge weighing module (range 10kg, accuracy ±0.5g);

[0049] Data acquisition: PLC real-time reading, sampling rate 200Hz.

[0050] Dual-channel filling system (oxidant / reducing agent station)

[0051] Physical isolation structure: center distance between two channels: 300mm; air curtain nozzle: 8 holes in a circular array (aperture 0.8mm), compressed air flow rate 15L / min; oxygen concentration in the isolation zone: ≤10% (measured data).

[0052] Feeder explosion-proof design: Oxidant vibration feeder: fully sealed titanium alloy shell, nitrogen flow rate 5L / min;

[0053] Reducing agent screw feeder: The cylinder is integrated with semiconductor cooling plates.

[0054] High-speed rotating mechanical structure: The station cover compacts and seals the inner cylinder, and the motor is used as the power to drive the rotating shaft to make the entire mixing station rotate eccentrically at high speed, and the material filled in the inner cylinder forms a circulating operation in the inner cylinder;

[0055] Also includes antistatic carrier: inner cylinder bracket coating: graphene modified polyurethane (surface resistance 3×10 5 Ω); Rotating static electricity monitoring: online electrometer real-time alarm (threshold 100V).

[0056] After mixing, the inner tube is sealed with a sealing agent.

[0057] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A high-safety automatic filling production process for combined fireworks inner tubes, characterized by: The following steps are involved: (a) Anti-blocking effect bead filling: The paper inner tube is quantitatively filled with fireworks effect beads through the anti-blocking structure; (b) Isolated redox agent packaging: A physically isolated dual-channel system is used to independently load the reducing agent and oxidizing agent at different times; (c) Mixing in the barrel: Using a high-speed rotating mechanical structure, the inner barrel filled in step (b) is conveyed to the mixing station via a belt to uniformly mix the effect beads, reducing agent, and oxidizing agent; (d) Stable packaging: Wood powder and sealing powder are layered into the mixed paper inner tube to complete the sealing.

2. The high-safety automatic filling production process for combined fireworks inner tubes according to claim 1, characterized in that: In step (a), the fireworks effect beads are loaded through an anti-blocking structure, and the anti-blocking structure includes: Gate opening and closing mechanism: A servo motor-driven arc-shaped gate is used to control the flow of bright beads by intermittent opening and closing, and the opening and closing frequency is synchronized with the production line beat; Three-dimensional diversion quantitative catheter: the inner wall is covered with ultra-smooth polytetrafluoroethylene coating, and a centrifugal disperser is installed at the end of the catheter to ensure that the bright beads fall into the paper inner tube in a directional manner and are evenly distributed.

3. The high-safety automatic filling production process for combined fireworks inner tubes according to claim 1, characterized in that: The specific implementation method of the independent loading of the reducing agent and the oxidizing agent in step (b) is as follows: Dual-channel time-sharing control system: The first material channel (oxidant): uses a precision vibrating feeder protected by nitrogen, and an electrostatic elimination ring is installed at the outlet; Second material channel (reducing agent): uses a constant temperature screw feeder and an integrated cooling jacket on the barrel wall; The loading actions of the two channels are controlled by PLC in a time-sharing manner, and a compressed air curtain isolation zone is set between the channels to prevent cross contamination; The filling amount is fed back in real time through a high-precision strain gauge load cell.

4. An automatic filling production line for firework inner tubes, used to implement the process described in any one of claims 1 to 4, characterized in that: include: Safety isolation unit: explosion-resistant concrete partition walls with a thickness of 240-380mm are set between workstations; The material transmission channel is equipped with dual redundant fire dampers and linked temperature / spark monitoring sensors; Mixing station in the drum: The inner drum is compacted and sealed by the station cover, and the motor is used as the power to drive the rotating shaft to make the entire mixing station rotate eccentrically at high speed, so that the filling material in the inner drum forms a circulation operation in the inner drum; Unitized quantitative control module: Each workstation is equipped with an independent weighing feedback system to accurately control the error of single-barrel charging amount; Sealing agent filling station and sealing agent compacting station.

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