Firework granulation equipment and granulation method

Abstract

The invention discloses firework granulation equipment which comprises a hopper and a granulation tank and further comprises a quantitative feeding mechanism with one end connected with a discharge port of the hopper and the other end connected with the granulation tank, a rotation driving device used for driving the granulation tank to rotate and a control device. The control device controls the quantitative feeding mechanism to quantitatively add medicine powder into the granulation tank; in the granulation process, the rotating speed of the granulation tank is adjusted according to the particle size of particles in the granulation tank, the inclination angle of the granulation tank is adjusted, the inclination angle beta is larger than or equal to 0 degree and smaller than or equal to 20 degrees, and the inclination angle of the granulation tank is increased along with increase of the particle size of the particles. The invention further provides a firework granulation method. According to the firework granulation equipment and the granulation method, automatic granulation can be realized, and the production efficiency is improved; the granulation product particles are tightly coated with powder, the uniformity is good, the phenomenon of abnormal large particles or lumping and caking can be effectively prevented, and the one-time forming qualification rate is high.

Description

Technical Field

[0001] This invention relates to the field of fireworks production technology, specifically to a fireworks granulation equipment and granulation method. Background Technology

[0002] Bright beads are the most important material in fireworks products, and their quality directly affects the light, sound, and color effects produced by the fireworks. The quality of bright beads is influenced not only by the raw materials but also by the manufacturing process.

[0003] Fireworks granulation involves feeding raw materials for fireworks beads into a granulation tank, which is then rotated by a drive device to achieve granulation. Currently, manual granulation is commonly used. Operators continuously add powder and spray water or alcohol into the rotating tank, using centripetal force to make the particles move in a circular motion. Particles meeting the required size are then scooped out from the vortex using a spoon. In traditional manual granulation, the granulation tank is tilted at approximately 25-30° for ease of operation. During rotation, the particles move in a circular motion, forming a vortex. During mixing, uneven force leads to significant differences in particle size and poor compaction. Larger particles tend to aggregate in the vortex, resulting in poor granulation. Therefore, continuous manual stirring of the particles in the vortex is necessary to improve mixing uniformity, break up loosely coated particles, and remove any clumps.

[0004] Therefore, the existing granulation process requires full manual supervision, which poses certain safety risks and has low production efficiency. It also suffers from uneven powder coating, poor compactness, and easy clumping of powder and granules, making product quality uncontrollable and requiring repeated testing and granulation.

[0005] Therefore, it is necessary to provide a new process to solve the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a fireworks granulation equipment and granulation method, which can realize automated granulation and improve production efficiency; the granulated product has a tight powder coating and good uniformity, which can effectively prevent abnormally large particles or clumping and agglomeration, and the one-time molding qualification rate is high.

[0007] The first aspect of the present invention is to provide a fireworks granulation device. A fireworks granulation device includes a granulation tank with an opening on one side, a rotary drive device for driving the granulation tank to rotate, and a control device; during the granulation process, the tilt angle of the granulation tank is adjusted according to the particle size inside the granulation tank, such that the tilt angle β satisfies: 0°≤β≤20°, and the tilt angle of the granulation tank increases as the particle size increases.

[0008] Furthermore, it also includes an angle adjustment device for adjusting the tilt angle of the granulation tank. The control device controls the working state of the angle adjustment device according to the particle size in the granulation tank in order to adjust the tilt angle of the granulation tank.

[0009] Furthermore, the angle adjustment device is an explosion-proof electric push rod.

[0010] Furthermore, it also includes a hopper and a quantitative feeding mechanism; one end of the quantitative feeding mechanism is connected to the discharge port of the hopper, and the other end is connected to the granulation tank; the control device controls the quantitative feeding mechanism to add a quantitative amount of medicine powder into the granulation tank.

[0011] Furthermore, the quantitative feeding mechanism includes a cylinder and a multi-stage valve disposed in the cylinder and dividing its internal space into multiple compartments, and the control device controls the opening and closing of the multi-stage valve.

[0012] Furthermore, the multi-stage valve includes a first material gate, a second material gate, and a third material gate, and the control device controls the opening and closing of the first material gate, the second material gate, and the third material gate;

[0013] When the first material gate, the second material gate, and the third material gate are closed, the first material gate and the second material gate are isolated to form a first material hopper, and the second material gate and the third material gate are isolated to form a second material hopper;

[0014] When the first material gate is opened, the material in the hopper falls into the first material bin;

[0015] When the second material gate is opened, the material in the first material bin falls into the second material bin;

[0016] When the third material gate is opened, the material in the second material hopper falls into the granulation tank.

[0017] Furthermore, the volume of the first silo is smaller than that of the second silo, and the amount of material fed at one time by the quantitative feeding mechanism is a multiple of the effective volume of the first silo.

[0018] Furthermore, the first material gate, the second material gate, and the third material gate each include a tilting baffle, a tilting shaft connected to the tilting baffle, and a rotary cylinder connected to the end of the tilting shaft.

[0019] Furthermore, during the granulation process, the rotation speed of the granulation tank is adjusted according to the particle size inside the granulation tank to match the tilt angle of the granulation tank; the rotation speed of the granulation tank is controlled by a control device to control the rotation drive device.

[0020] Furthermore, the rotary drive device includes a hydraulic motor, a rotary shaft connected to and driving the hydraulic motor to rotate, a bearing housing for supporting the rotary shaft, and a connecting plate for supporting the bearing housing. The rotary shaft is connected to the granulation tank.

[0021] Furthermore, it also includes an angle adjustment device for adjusting the tilt angle of the granulation tank, the angle adjustment device being connected to the connecting plate.

[0022] Furthermore, it also includes an additive spraying device located in the granulation tank, and the control device controls the additive spraying device to quantitatively replenish the additive.

[0023] A second aspect of the present invention is to provide a method for granulating fireworks. A method for granulating fireworks, using the fireworks granulation equipment described in the first aspect, includes the following steps:

[0024] Step S1: Quantitatively add core material into the granulation tank in one step;

[0025] Step S2, multi-stage granulation: The granulation process is divided into multiple stages. The amount of Chinese medicine powder and additives added in each stage is controlled, as well as the rotation speed and tilt angle of the granulation tank in each stage, so that the particles in the tank are always in a uniform rolling linear motion to obtain particles with uniform particle size. Among them, the rotation speed and tilt angle of the granulation tank in each stage increase with the increase of particle size.

[0026] Furthermore, in step S2, multi-stage granulation includes:

[0027] In the first stage, the tilt angle of the granulation tank is controlled to be 0°≤β≤8°, and the core material is coated with powder to 14-12 mesh.

[0028] In the second stage, the tilt angle of the granulation tank is controlled to be 8°<β≤14°, and the granules are coated with powder to 12-10 mesh.

[0029] In the third stage, the tilt angle of the granulation tank is controlled to be 14°<β≤18°, and the granules are coated with powder to 10-8 mesh.

[0030] In the fourth stage, the tilt angle of the granulation tank is controlled to be 18°<β≤20°, and the granules are coated with powder to a mesh size of 8 or higher.

[0031] Preferably, in step S2, the multi-stage granulation includes:

[0032] In the first stage, the tilt angle of the granulation tank is controlled to be 0°≤β≤8°, the rotation speed of the granulation tank is 10-15 revolutions / second, and the core material is coated with powder to 14-12 mesh.

[0033] In the second stage, the tilt angle of the granulation tank is controlled to be 8°<β≤14°, the rotation speed of the granulation tank is 15-20 revolutions / second, and the granules are coated with powder to 12-10 mesh.

[0034] In the third stage, the tilt angle of the granulation tank is controlled to be 14°<β≤18°, the rotation speed of the granulation tank is 20-25 revolutions / second, and the granules are coated with powder to 10-8 mesh.

[0035] In the fourth stage, the tilt angle of the granulation tank is controlled to be 18°<β≤20°, the rotation speed of the granulation tank is 25-35 revolutions / second, and the granules are coated with powder to a mesh size of 8 or higher.

[0036] Furthermore, a quantitative feeding mechanism is used to feed the core material and powder into the granulation tank; the quantitative feeding mechanism includes a cylinder and a multi-stage valve located in the cylinder and dividing its internal space into multiple compartments; the multi-stage valve includes a first material gate, a second material gate, and a third material gate; when the first material gate, the second material gate, and the third material gate are closed, the first material gate and the second material gate are isolated to form a first material compartment, and the second material gate and the third material gate are isolated to form a second material compartment;

[0037] The method for quantitatively dispensing the medicinal powder includes the following steps:

[0038] The first material gate is opened, and the powder falls from the hopper into the first material hopper. When the opening time of the first material gate reaches the set time, the first material gate is closed, and the first material hopper is filled.

[0039] Control the opening of the second material gate, and the powder falls from the first material hopper to the second material hopper. When the opening time of the second material gate reaches the set time, control the closing of the second material gate, and at this time all the powder in the first material hopper falls into the second material hopper.

[0040] Repeatedly control the working status of the first and second material gates to ensure that the amount of powder falling into the second material hopper meets the requirements; at this time, control the third material gate to open, and the powder falls from the second material hopper into the granulation tank. When the opening time of the third material gate reaches the set time, control the third material gate to close. At this time, all the powder in the second material hopper falls into the granulation tank, completing one quantitative feeding.

[0041] The amount of powder added in each stage is a multiple of the effective volume of the first silo. Compared with the prior art, the fireworks granulation equipment and granulation method provided by this invention have the following advantages:

[0042] I. The fireworks granulation equipment and method provided by this invention divides the granulation process into multiple stages. By controlling the amount of medicinal powder and additives added in each stage, as well as the rotation speed and tilt angle of the granulation tank in each stage, the particles inside the tank are kept in a uniform tumbling linear motion to obtain particles with uniform particle size. The granulation method provided by this invention produces granules with tight powder coating and good uniformity, effectively preventing abnormally large particles or clumping. The one-time molding pass rate is high, reaching over 95%.

[0043] II. The fireworks granulation equipment and granulation method provided by this invention can realize quantitative feeding and automated granulation, which improves production efficiency; it avoids the harm to the human body caused by dust and agents, and greatly improves the guarantee of safe production. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of the fireworks granulation equipment of the present invention;

[0046] Figure 2 yes Figure 1 The diagram shows a partial structural schematic of the fireworks granulation equipment.

[0047] Figure 3 yes Figure 2 The diagram shows the structure of the quantitative feeding mechanism in the fireworks granulation equipment.

[0048] Figure 4 yes Figure 3 A partial structural schematic diagram of the quantitative feeding mechanism is shown below;

[0049] Figure 5 yes Figure 3 A schematic cross-sectional view of the quantitative feeding mechanism shown.

[0050] Figure 6 yes Figure 3 The diagram shown illustrates the working principle of the quantitative feeding mechanism.

[0051] Figure 7 This is a schematic diagram of granulation tanks at different granulation stages in the fireworks granulation method of the present invention;

[0052] Figure 8 This is a diagram showing the relationship between different tilt angles of the granulation tank and the mixing trajectory of the material inside the tank in the fireworks granulation method of the present invention. Detailed Implementation

[0053] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below.

[0054] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0055] Please refer to the following: Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the structure of the fireworks granulation equipment of the present invention; Figure 2 yes Figure 1 The diagram shows a partial structural schematic of the fireworks granulation equipment. The fireworks granulation equipment of the present invention includes a hopper 1, a quantitative feeding mechanism 2 connected to the discharge of the hopper 1, a granulation tank 3 connected to the quantitative feeding mechanism, an additive spraying device (not shown) disposed in the granulation tank, a rotary drive device 5 for driving the granulation tank to rotate, an angle adjustment device 6 for adjusting the tilt angle of the granulation tank, and a control device 7.

[0056] Please refer to the following: Figures 3 to 5 ,in Figure 3 yes Figure 2 The diagram shows the structure of the quantitative feeding mechanism in the fireworks granulation equipment. Figure 4 yes Figure 3 A partial structural schematic diagram of the quantitative feeding mechanism is shown below; Figure 5 yes Figure 3 The diagram shows a cross-sectional view of the quantitative feeding mechanism. The quantitative feeding mechanism 2 includes a cylinder 21, a multi-stage valve 22 disposed within the cylinder and dividing its internal space into multiple compartments, and a control device 7 controlling the opening and closing of the multi-stage valves. The upper end of the cylinder 21 is connected to the bottom of the hopper 1, and the lower end of the cylinder 21 is placed inside the granulation tank 3, allowing the material in the hopper to be quantitatively fed into the granulation tank 3. In this invention, the falling of the powder is controlled by controlling the opening time of the multi-stage valves.

[0057] The multi-stage valve 22 includes a first feed gate 221, a second feed gate 222, and a third feed gate 223. When the first, second, and third feed gates are closed, the first feed gate 221 and the second feed gate 222 are isolated to form a first hopper 23, and the second feed gate 222 and the third feed gate 223 are isolated to form a second hopper 24. In this invention, the volume of the first hopper 23 is smaller than the volume of the second hopper 24, and the single feeding amount of the quantitative feeding mechanism is a multiple of the effective volume of the first hopper 23, where the effective volume of the first hopper 23 is the minimum volume for a single feeding. When the feeding amount needs to be increased, it is increased proportionally to the effective volume of the first hopper 23.

[0058] It should be noted that the single feeding amount refers to the amount of material fed into the granulation tank at one time through the third material gate 223.

[0059] The first material gate 221, the second material gate 222, and the third material gate 223 have the same structure. Taking the structure of the third material gate 223 as an example, it includes a flip baffle 2231, a flip shaft 2232 connected to the flip baffle, and a rotary cylinder 2233 connected to the end of the flip shaft 2232. The rotary cylinder 2233 is located outside the cylinder. The area of ​​the flip baffle 2231 is equivalent to the cross-sectional area of ​​the corresponding position of the cylinder. The rotary cylinder 2233 drives the flip shaft 2232 to flip, so that the flip baffle seals or opens the corresponding cross-section of the hopper.

[0060] In another implementation, the cross-sectional area of ​​the bottom of the second hopper 24 is larger than the cross-sectional area of ​​its top. Therefore, the area of ​​the flip baffle corresponding to the third material gate 223 is larger than the area of ​​the flip baffle corresponding to the first material gate 221 and the second material gate 222, while other structures remain unchanged.

[0061] Please see Figure 6 ,yes Figure 3 The diagram shown illustrates the working principle of the quantitative feeding mechanism. The working principle of the quantitative feeding mechanism is as follows:

[0062] (1) When feeding the core material, a quantitative one-time feeding method is adopted, that is, the first material gate 221, the second material gate 222 and the third material gate 223 are opened simultaneously, such as Figure 6 As shown in f.

[0063] (2) For medicinal powder, the working principle of quantitative feeding is (e.g.) Figure 6 a-6e):

[0064] The first material gate 221 is opened, and the powder falls from the hopper 1 to the first material hopper 23. When the opening time of the first material gate 221 reaches the set time, the first material gate 221 is closed, and the first material hopper 23 is filled.

[0065] The second material gate 222 is opened, and the powder falls from the first material bin 23 to the second material bin 24. When the opening time of the second material gate reaches the set time, the second material gate 222 is closed, and at this time all the powder in the first material bin falls into the second material bin.

[0066] The third material gate 223 is opened, and the powder falls from the second material hopper 24 into the granulation tank 3. When the opening time of the third material gate 223 reaches the set time, the third material gate 223 is closed. At this time, all the powder in the second material hopper falls into the granulation tank, completing one quantitative feeding.

[0067] The granulation tank 3 is an elliptical tank with an opening on one side, and the lower end of the cylindrical body 21 is placed at the opening of the granulation tank 3. The additive spraying device includes a tank for holding the additive, a conveying pipe connected to the tank, and a nozzle located at the end of the conveying pipe, wherein the nozzle is located at the opening of the granulation tank, and when the granulation tank rotates, the additive sprayed by the nozzle is uniformly mixed with the powder.

[0068] A rotary drive device 5 is used to drive the granulation tank to rotate, thereby mixing the materials inside the tank. In this embodiment, the rotary drive device 5 includes a hydraulic motor 51, a rotating shaft 52 connected to and driving the hydraulic motor to rotate, a bearing seat 53 for supporting the rotating shaft, and a connecting plate 54 supporting the bearing seat 53. The rotating shaft 52 is connected to the granulation tank 3 and is connected to the side of the granulation tank 3 opposite to its opening. An angle adjustment device 6 is connected to the connecting plate 54 and is used to adjust the tilt angle of the connecting plate 54 to adjust the tilt angle of the granulation tank 3. Please refer to the actual reference for the tilt angle β of the granulation tank 3. Figure 2 .

[0069] As another implementation, the angle adjustment device 6 can also be directly connected to the granulation tank 3 in other ways to adjust the tilt angle of the granulation tank 3.

[0070] The angle adjustment device 6 is electrically connected to the control device 7, and the control device 7 controls the working state of the angle adjustment device 6. In this embodiment, the angle adjustment device 6 is an explosion-proof electric push rod, which can achieve precise angle control and ensure its operational safety. The tilt angle of the granulation tank 3 is adjusted by controlling the extension and retraction length of the explosion-proof electric push rod.

[0071] In this invention, the tilt angle of the granulation tank is β, which satisfies the following condition: 0°≤β≤20°. Specifically, the control device 7 adjusts the rotation speed of the granulation tank 3 according to the particle size inside the granulation tank 3, and controls the working state of the angle adjustment device 6 to adjust the tilt angle of the granulation tank 3, so that the particles inside the tank are always in a uniform tumbling linear motion to obtain particles with uniform particle size. As the particle size increases, the rotation speed and tilt angle of the granulation tank 3 increase.

[0072] Based on the aforementioned fireworks granulation equipment, the fireworks granulation method of the present invention includes the following steps:

[0073] Step S1: Add a quantitative amount of core material into the granulation tank at one time;

[0074] Specifically, a quantitative one-time feeding method is adopted, that is, the verified amount of core material is loaded into the hopper 1, and the first material gate 221, the second material gate 222 and the third material gate 223 are opened simultaneously to connect the hopper 1 and the granulation tank 3, and the verified core material is fed into the granulation tank 3 in one go.

[0075] Step S2, multi-stage granulation: The granulation process is divided into multiple stages. The amount of medicinal powder and additives added in each stage, as well as the rotation speed and tilt angle of the granulation tank in each stage, are controlled so that the particles in the tank are always in a uniform tumbling linear motion to obtain particles with uniform particle size. Among them, the particle size increases with the amount of medicinal powder and additives added in each stage, and the rotation speed and tilt angle of the granulation tank 3 increase with the increase of particle size.

[0076] In the specific process, the amount of Chinese herbal powder and additives added at each stage increases continuously, and the amount of Chinese herbal powder added at each stage is a multiple of the effective volume of the first silo. The method for quantitatively adding the herbal powder includes the following steps:

[0077] The first material gate is opened, and the powder falls from the hopper into the first material hopper. When the opening time of the first material gate reaches the set time, the first material gate is closed, and the first material hopper is filled.

[0078] Control the opening of the second material gate, and the powder falls from the first material hopper to the second material hopper. When the opening time of the second material gate reaches the set time, control the closing of the second material gate, and at this time all the powder in the first material hopper falls into the second material hopper.

[0079] Repeatedly control the working status of the first and second material gates to ensure that the amount of powder falling into the second material hopper meets the requirements; at this time, control the third material gate to open, and the powder falls from the second material hopper into the granulation tank. When the opening time of the third material gate reaches the set time, control the third material gate to close. At this time, all the powder in the second material hopper falls into the granulation tank, completing one quantitative feeding.

[0080] Therefore, in this invention, when the required amount of powder is greater than the effective volume of the first silo, it is increased by multiples according to the effective volume of the first silo.

[0081] The specific implementation method for quantitative feeding of medicinal powder is as follows:

[0082] (1) Assume the effective volume of the small silo is 0.7L and the effective volume of the large silo is 2.2L. In the early stage of the mixing process, only 0.7L of powder needs to be added each time, which is one effective volume of the small silo. The feeding process is as follows:

[0083] The hopper is filled with the appropriate amount of powder, and all material gates are closed at this time (e.g., Figure 6 a) The control device controls the opening of the first material gate (e.g.) Figure 6 b) After a preset time of 7 seconds, the first material gate will close (at which point the first material hopper will be full). Figure 6 c) Control the opening of the second feed gate (at this time, the powder in the first feed hopper falls into the second feed hopper, such as...) Figure 6 d) After a preset time of 7 seconds, the second material gate is closed (at this time, all the powder in the first material hopper falls into the second material hopper). Control the third feed gate to open (at this time, all 0.7L of powder will fall into the feed tank, such as...) Figure 6 e) The third material gate closes after a preset time of 7 seconds. At this point, the process of adding 0.7L of powder into the material tank is complete.

[0084] (2) Assume the effective volume of the first silo is 0.7L and the effective volume of the second silo is 2.2L. During the later stages of the mixing process, 1.4L of powder needs to be added each time, which is twice the effective volume of the first silo. The feeding process is as follows:

[0085] The hopper is filled with the appropriate amount of powder, and all material gates are closed at this time (e.g., Figure 6 a) The control device controls the opening of the first material gate (e.g.) Figure 6 b) After a preset time of 7 seconds, the first material gate will close (at which point the first material hopper will be full). Figure 6 c) Control the opening of the second feed gate (at this time, the powder in the first feed hopper falls into the second feed hopper, such as...) Figure 6 d) After a preset time of 7 seconds, the second material gate is closed (at this time, all the powder in the first material hopper falls into the second material hopper, and the second material hopper contains 0.7L of powder). Control the opening of the first material gate (e.g.) Figure 6 b) After a preset time of 7 seconds, the first material gate will close (at which point the first material hopper will be full). Figure 6 c) Control the opening of the second feed gate (at this time, the powder in the first feed hopper falls into the second feed hopper, such as...) Figure 6 d) After a preset time of 7 seconds, the second material gate is closed (at this time, all the powder in the first material hopper falls into the second material hopper, and the second material hopper contains 1.4L of powder). Control the third feed gate to open (at this time, all 1.4L of powder will fall into the feed tank, such as...) Figure 6 e) The third material gate closes after a preset time of 7 seconds. At this point, the process of adding 1.4L of powder into the material tank is complete.

[0086] This cycle can be repeated to feed 2.1L, 2.8L, 3.5L, and other quantities of medicine powder that are several times larger than the effective volume of the first silo.

[0087] During multi-stage granulation, as the particle size increases, the rotational speed and tilt angle of the granulation tank also increase.

[0088] In the first stage, the tilt angle of the granulation tank is controlled to be 0°≤β≤8°, the rotation speed of the granulation tank is 10-15 revolutions / second, and the core material is coated with powder to 14-12 mesh.

[0089] In the second stage, the tilt angle of the granulation tank is controlled to be 8°<β≤14°, the rotation speed of the granulation tank is 15-20 revolutions / second, and the granules are coated with powder to 12-10 mesh.

[0090] In the third stage, the tilt angle of the granulation tank is controlled to be 14°<β≤18°, the rotation speed of the granulation tank is 20-25 revolutions / second, and the granules are coated with powder to 10-8 mesh.

[0091] In the fourth stage, the tilt angle of the granulation tank is controlled to be 18°<β≤20°, the rotation speed of the granulation tank is 25-35 revolutions / second, and the granules are coated with powder to 8-7 mesh.

[0092] In this invention, the tilt angle of the granulation tank is β, which satisfies the following condition: 0° ≤ β ≤ 20°. The tilt angle of the granulation tank has the following two effects on the granulation process:

[0093] (1) Since the material tank is an elliptical tank with one side opening, the volume of the container arc surface is fixed, thus determining the amount of core material. As the amount of additives and powder increases, the outer diameter of the particles continuously increases, and the overall volume and mass increase. The tank must increase the angle β to expand the volume of the container arc surface. By reasonably matching the corresponding external forces, the particles are ensured to be subjected to balanced forces, avoiding the influence of centripetal force, maintaining the original uniform rolling linear motion, and ensuring that each particle fully absorbs the additives under the condition of balanced interaction forces, is tightly coated with powder, and the outer diameter increases uniformly.

[0094] (2) The tilt angle β is within a certain specified range (0°≤β≤20°). According to the continuous increase of the powder quality, the corresponding tilt angle and rotation speed are matched to provide different external forces to ensure the movement trajectory of the particles in the granulation tank. The particles absorb additives and the powder coating granulation effect is significant and the efficiency is faster.

[0095] Please refer to the following: Figures 7-8 ,in Figure 7 This is a schematic diagram of granulation tanks at different granulation stages in the fireworks granulation method of the present invention; Figure 8 This is a diagram showing the relationship between different tilt angles of the granulation tank and the mixing trajectory of the material inside the tank in the fireworks granulation method of this invention. When β=0°, the effective volume inside the granulation tank is at its minimum, requiring a fixed amount of core material to be added and matched with a corresponding external force to ensure that the particles can be mixed uniformly. However, the interaction force between the particles is almost zero, so that the trajectory of the core material maintains a uniform, tumbling linear motion.

[0096] When β=20°, the volume of the container's curved surface increases to accommodate the increase in particle volume, ensuring that the interaction force between particles is almost zero. Matching an appropriate rotation speed can guarantee the original uniform tumbling linear motion trajectory, avoiding the influence of centripetal force, centrifugal force, and interaction force between particles during material mixing. This prevents the particle motion trajectory from becoming circular motion, causing uneven force during particle mixing, resulting in significant differences in particle size, poor compactness, and larger particles gathering in the vortex, leading to poor granulation effect or even failure.

[0097] When β is greater than 20°, the external force can be adjusted to avoid the influence of vortex, but the rolling powder coating of particles has poor force effect and poor compactness.

[0098] When β=30°, the movement trajectory of the particles in the granulation tank is a vortex. When the material is mixed, the particles are affected by centripetal force, centrifugal force and the interaction force between particles. The particle movement trajectory becomes a circular motion. During the particle mixing process, the force is uneven, which leads to significant differences in particle size and poor compaction. Larger particles will gather in the vortex, resulting in poor granulation effect or even failure.

[0099] The granulation method of the present invention will be described in detail below through specific embodiments.

[0100] A method for granulating fireworks includes the following steps:

[0101] Step S1: Add 25 kg of core material (22-16 mesh) into the granulation tank in a single quantitative batch.

[0102] Step S2, multi-stage granulation:

[0103] Phase 1: Each time, 0.7 kg of powder is added, along with 0.15 kg of additive (added in multiple batches depending on the water absorption of the powder). The mixture is then thoroughly rolled and evenly coated with powder. This cycle is repeated 14 times, with each cycle lasting 38 seconds, for a total of 532 seconds (8.87 minutes). The can angle is 0 degrees, and the rotation speed is 10 revolutions per second (for cans with a diameter of 80 mm). During this phase, the core material is evenly coated with powder to a mesh size of 14-12.

[0104] The second stage: As the core material is evenly coated with powder, the weight and volume of individual particles effectively increase. Each time, 1.4 kg of powder is used, along with 0.3 kg of additive (added in multiple batches depending on the water absorption of the powder). Then, the particles are thoroughly rolled and evenly coated with powder. This cycle is repeated 7 times, with each cycle lasting 76 seconds, for a total duration of 532 seconds (8.87 minutes). The can angle is increased to 10 degrees, and the rotation speed is increased to 18 revolutions per second. During this stage, the particles are evenly coated with powder to a mesh size of 12-10.

[0105] The third stage: Each time, 2.1 kg of powder is added, along with 0.45 kg of additive (added in multiple batches depending on the water absorption of the powder), and then the mixture is thoroughly rolled to ensure even coating. This cycle is repeated 5 times, with each cycle lasting 114 seconds, for a total stage time of 570 seconds (9.5 minutes). The can angle is adjusted to 15 degrees, and the rotation speed is increased to 22 revolutions per second. During this stage, the granules are evenly coated with powder to a mesh size of 10-8 mesh.

[0106] Fourth stage: Each time, 2.8 kg of powder is added, along with 0.6 kg of additive (added in multiple batches depending on the water absorption of the powder), and then the mixture is thoroughly rolled to ensure even coating. This cycle is repeated 4 times, with each cycle lasting 152 seconds, for a total stage time of 608 seconds (10.14 minutes). The tank angle is adjusted to 20 degrees, and the rotation speed is increased to 32 revolutions per second. During this stage, the granules are evenly coated with powder to a mesh size of 7-8 mesh.

[0107] Therefore, in this embodiment, coating 25 kg of 22-16 mesh core material with powder to 8-7 mesh takes only 37.4 minutes, greatly improving production efficiency. The powder-coated particles are tightly and uniformly enlarged, the beads are round and full, the molding specifications are uniform with minimal differences, and the one-time molding achieves a pass rate of over 95%.

[0108] In addition to the above embodiments, the tilt angle of the granulation tank can be adjusted manually, or granulation tanks with different tilt angles can be set for each stage to achieve the purpose of placing the granulation tank at different tilt angles at different granulation stages. The technical solution of setting multiple granulation tanks with different tilt angles for granulation is as follows: Based on the above granulation process, multiple granulation tanks with different tilt angles are set according to the granulation stage. Particles coated with powder to the corresponding particle size in the previous stage are removed from the granulation tank and then granulated again in the granulation tank of the next stage. This cycle is repeated until the particle size of the granulated particles meets the design requirements.

[0109] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A fireworks granulation device, comprising a granulation tank with an opening on one side, characterized in that, It also includes a rotary drive device for driving the granulation tank to rotate, and a control device; during the granulation process, the tilt angle of the granulation tank is adjusted according to the particle size in the granulation tank, so that the tilt angle β satisfies: 0°≤β≤20°, and the tilt angle of the granulation tank increases as the particle size increases.

2. The fireworks granulation equipment according to claim 1, characterized in that, It also includes an angle adjustment device for adjusting the tilt angle of the granulation tank. The control device controls the working state of the angle adjustment device according to the particle size in the granulation tank in order to adjust the tilt angle of the granulation tank.

3. The fireworks granulation equipment according to claim 2, characterized in that, The angle adjustment device is an explosion-proof electric push rod.

4. The fireworks granulation equipment according to claim 1, characterized in that, It also includes a hopper and a quantitative feeding mechanism; one end of the quantitative feeding mechanism is connected to the outlet of the hopper, and the other end is connected to the granulation tank; the control device controls the quantitative feeding mechanism to add the powder to the granulation tank in a quantitative manner.

5. The fireworks granulation equipment according to claim 4, characterized in that, The quantitative feeding mechanism includes a cylinder and a multi-stage valve located in the cylinder and dividing its internal space into multiple compartments. The control device controls the opening and closing of the multi-stage valve.

6. The fireworks granulation equipment according to claim 5, characterized in that, The multi-stage valve includes a first material gate, a second material gate, and a third material gate, and the control device controls the opening and closing of the first material gate, the second material gate, and the third material gate; When the first material gate, the second material gate, and the third material gate are closed, the first material gate and the second material gate are isolated to form a first material hopper, and the second material gate and the third material gate are isolated to form a second material hopper; When the first material gate is opened, the material in the hopper falls into the first material bin; When the second material gate is opened, the material in the first material bin falls into the second material bin; When the third material gate is opened, the material in the second material hopper falls into the granulation tank.

7. The fireworks granulation equipment according to claim 6, characterized in that, The volume of the first silo is smaller than that of the second silo, and the amount of material fed at one time by the quantitative feeding mechanism is a multiple of the effective volume of the first silo.

8. The fireworks granulation equipment according to claim 6, characterized in that, The first material gate, the second material gate, and the third material gate each include a flipping baffle, a flipping shaft connected to the flipping baffle, and a rotary cylinder connected to the end of the flipping shaft.

9. The fireworks granulation equipment according to claim 1, characterized in that, During the granulation process, the rotation speed of the granulation tank is adjusted according to the particle size inside the granulation tank to match the tilt angle of the granulation tank; the rotation speed of the granulation tank is controlled by a control device to control the rotation drive device.

10. The fireworks granulation equipment according to claim 1, characterized in that, The rotary drive device includes a hydraulic motor, a rotary shaft connected to and driving the hydraulic motor to rotate, a bearing housing for supporting the rotary shaft, and a connecting plate for supporting the bearing housing. The rotary shaft is connected to the granulation tank.

11. The fireworks granulation equipment according to claim 10, characterized in that, It also includes an angle adjustment device for adjusting the tilt angle of the granulation tank, the angle adjustment device being connected to the connecting plate.

12. The fireworks granulation equipment according to claim 1, characterized in that, It also includes an additive spraying device located in the granulation tank, and the control device controls the additive spraying device to quantitatively replenish the additive.

13. A method for granulating fireworks, characterized in that, The fireworks granulation equipment according to any one of claims 1-12 comprises the following steps: Step S1: Quantitatively add core material into the granulation tank in one step; Step S2, multi-stage granulation: The granulation process is divided into multiple stages. The amount of Chinese medicine powder and additives added in each stage is controlled, as well as the rotation speed and tilt angle of the granulation tank in each stage, so that the particles in the tank are always in a uniform rolling linear motion to obtain particles with uniform particle size. Among them, the rotation speed and tilt angle of the granulation tank in each stage increase with the increase of particle size.

14. The fireworks granulation method according to claim 13, characterized in that, In step S2, multi-stage granulation includes: In the first stage, the tilt angle of the granulation tank is controlled to be 0°≤β≤8°, and the core material is coated with powder to 14-12 mesh. In the second stage, the tilt angle of the granulation tank is controlled to be 8°<β≤14°, and the granules are coated with powder to 12-10 mesh. In the third stage, the tilt angle of the granulation tank is controlled to be 14°<β≤18°, and the granules are coated with powder to 10-8 mesh. In the fourth stage, the tilt angle of the granulation tank is controlled to be 18°<β≤20°, and the granules are coated with powder to a mesh size of 8 or higher.

15. The fireworks granulation method according to claim 14, characterized in that, In step S2, multi-stage granulation includes: In the first stage, the tilt angle of the granulation tank is controlled to be 0°≤β≤8°, the rotation speed of the granulation tank is 10-15 revolutions / second, and the core material is coated with powder to 14-12 mesh. In the second stage, the tilt angle of the granulation tank is controlled to be 8°<β≤14°, the rotation speed of the granulation tank is 15-20 revolutions / second, and the granules are coated with powder to 12-10 mesh. In the third stage, the tilt angle of the granulation tank is controlled to be 14°<β≤18°, the rotation speed of the granulation tank is 20-25 revolutions / second, and the granules are coated with powder to 10-8 mesh. In the fourth stage, the tilt angle of the granulation tank is controlled to be 18°<β≤20°, the rotation speed of the granulation tank is 25-35 revolutions / second, and the granules are coated with powder to a mesh size of 8 or higher.

16. The fireworks granulation method according to claim 13, characterized in that, A quantitative feeding mechanism is used to feed core material and pharmaceutical powder into the granulation tank; the quantitative feeding mechanism includes a cylinder and a multi-stage valve located in the cylinder and dividing its internal space into multiple compartments; the multi-stage valve includes a first material gate, a second material gate, and a third material gate; when the first material gate, the second material gate, and the third material gate are closed, the first material gate and the second material gate are isolated to form a first material compartment, and the second material gate and the third material gate are isolated to form a second material compartment; The method for quantitatively dispensing the medicinal powder includes the following steps: The first material gate is opened, and the powder falls from the hopper into the first material hopper. When the opening time of the first material gate reaches the set time, the first material gate is closed, and the first material hopper is filled. Control the opening of the second material gate, and the powder falls from the first material hopper to the second material hopper. When the opening time of the second material gate reaches the set time, control the closing of the second material gate, and at this time all the powder in the first material hopper falls into the second material hopper. Repeatedly control the working status of the first and second material gates to ensure that the amount of powder falling into the second material hopper meets the requirements; at this time, control the third material gate to open, and the powder falls from the second material hopper into the granulation tank. When the opening time of the third material gate reaches the set time, control the third material gate to close. At this time, all the powder in the second material hopper falls into the granulation tank, completing one quantitative feeding. The amount of powder added at each stage is a multiple of the effective volume of the first silo.

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