A self-cleaning powder mixing device for fireworks production

Abstract

The present application discloses a self-cleaning medicine mixing device for fireworks production, comprising a fixed frame, a frame, a turning mechanism, a conveying mechanism and a sealing mechanism installed on the frame, the conveying mechanism comprising a conveyor belt fixedly connected below the sealing mechanism and a transmission device fixedly installed on the fixed frame, the conveyor belt is connected to the transmission device to transport the fireworks inner tube, the fireworks inner tube is sealed and fixed on the conveyor belt by the sealing mechanism, the turning mechanism comprises a first cylinder fixedly installed on the fixed frame and a rotating shaft connecting the fixed frame and the frame, the first cylinder lifts up one side of the frame and drives the frame in a horizontal position and the sealing mechanism and the conveyor belt fixed with the fireworks inner tube to reciprocate with the rotating shaft as the center. The medicine mixing device can mix the medicine in the fireworks inner tube, which can greatly reduce the risk of explosion. The conveyor belt has a self-cleaning function, which prevents the risk caused by excessive dust adhesion, has high medicine mixing efficiency, can improve production capacity, and ensure the safety of the equipment.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automated production lines for fireworks charge, and in particular to a self-cleaning charge mixing device for fireworks production. Background Art

[0002] There are many processes in the production of fireworks, and the barrels of fireworks are filled with flammable and explosive drug ingredients, such as carbon powder, high potassium, sulfur, silver powder, and alloy powder, which have great dust hazards and explosion risks. The heavy work is mostly done by manual operation with drugs, which is dangerous and has low productivity. There is still a large gap in equipment for charging the inner barrel of fireworks. There are some R&D equipment on the market, but the technology is not mature and the degree of automation is low. The main problems in the mixing process are as follows:

[0003] 1) In traditional manual and existing automated equipment, the oxidant and the reductant are first mixed together to form the opening powder and then loaded into the inner tube of the fireworks. This link is one of the links with the most casualties in the inner tube filling.

[0004] 2) There is gunpowder powder residue around the existing mixing and loading equipment on the market, which poses a safety hazard.

[0005] In view of this, designing a new type of safe powder mixing device for fireworks production is one of the problems that need to be solved urgently. Summary of the invention

[0006] In view of the problems of low automation degree and great safety hazards in the drug mixing process in the prior art, the present application proposes a self-cleaning drug mixing device for fireworks production to solve the problems mentioned in the above background technology. The drug mixing device includes a fixed frame, a frame, a turning mechanism, a conveying mechanism and a sealing mechanism installed on the frame. The conveying mechanism includes a conveyor belt fixedly connected under the sealing mechanism and a transmission device fixedly installed on the fixed frame. The conveyor belt is connected with the transmission device to transport the inner tube of the fireworks. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism. The turning mechanism includes a first cylinder fixedly installed on the fixed frame and a rotating shaft connecting the fixed frame and the frame. The first cylinder lifts one side of the frame and drives the frame in a horizontal position and the sealing mechanism and the conveyor belt fixed with the inner tube of the fireworks to reciprocate with the rotating shaft as the center. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism, and the drugs in the inner tube of the fireworks are fully mixed with the frame.

[0007] In some embodiments, when one side of the frame is lifted up, the transmission device and the conveyor belt are disengaged from the transmission, and when the frame returns to the horizontal position, the transmission device and the conveyor belt are connected to the transmission. Therefore, when one side of the frame is lifted up, the transmission device and the conveyor belt stop transmitting, and when the frame returns to the horizontal position, the transmission device and the conveyor belt are connected to the transmission, and the conveyor belt continues to rotate to transport the firecracker inner tube with the mixed powder away.

[0008] In some embodiments, the sealing mechanism includes a sealing bracket, a sealing plate, a second cylinder and a third cylinder. The second cylinder is arranged on the sealing bracket to fix the inner cylinder of the firecracker at a desired position on the conveying surface on the upper side of the conveyor belt. The third cylinder is fixed on the sealing bracket and connected to the sealing plate to control the sealing plate to move in a direction perpendicular to the conveying surface of the conveyor belt. The second cylinder blocks the inner cylinder of the firecracker at a desired position, and the third cylinder fixes the inner cylinder of the firecracker on the conveyor belt through the sealing plate, so that the inner cylinder of the firecracker can be turned over together with the random bracket later, and finally the mixing process of the inner cylinder of the firecracker is completed.

[0009] In some embodiments, the device further comprises a water tank disposed below the conveyor belt and a cleaning drum partially immersed in the water tank, wherein the cleaning drum and the water tank are fixed on a fixing frame, and when the conveyor belt is connected to the transmission device, the cleaning drum contacts the conveying surface on the lower side of the conveyor belt. The conveyor belt is cleaned by the cleaning drum and the water tank, which greatly reduces the risk and safety hazard caused by the adhesion of gunpowder powder on the conveyor belt.

[0010] In some embodiments, a water tank is also included, which is connected to the water tank and supplies water to the water tank. Supplying water to the water tank through the water tank ensures the cleaning efficiency of the washing drum.

[0011] In some embodiments, the transmission device includes a driving wheel and an idler wheel connected to the driving wheel. When the transmission device and the conveyor belt are connected to the transmission, the idler wheel is connected to the driven wheel on the conveyor belt. When the transmission device and the conveyor belt are disconnected from the transmission, the idler wheel is separated from the driven wheel on the conveyor belt. The transmission belt in the transmission mechanism is a non-powered mechanism, which reduces costs and also reduces the risk of explosion.

[0012] In some embodiments, a first sensor and a second sensor are also included. The first sensor is arranged above the conveyor belt to detect that the inner tube of the fireworks reaches the required position on the conveying surface on the upper side of the conveyor belt and triggers a first instruction to stop the conveyor belt from transmitting. The second sensor is fixed on the fixed frame to detect the terminal position of the frame being lifted and triggers a second instruction to make the frame fall back to a horizontal position. Automatic operation can be achieved by detecting the position of the first sensor and the second sensor and triggering the movement of other mechanisms.

[0013] In some embodiments, the device further comprises a first shock absorbing device and a second shock absorbing device, which are fixed on the fixed frame and respectively perform shock absorption and buffering when the frame is lifted to the end position and returns to the horizontal position. The first shock absorbing device and the second shock absorbing device can buffer and absorb shock at the starting position and the end position of the flipping, thereby ensuring the stability of the medicine mixing device.

[0014] In certain embodiments, the invention also includes a brake device, which is connected to the conveyor belt and controls the conveyor belt to stop rotating when the fireworks inner tube is fixed. The brake device is used to stop the conveyor belt from rotating when the fireworks inner tube is fixed.

[0015] In some embodiments, a counterweight is fixed on the other side of the frame, which can play a balancing role when the frame flips, so as to prevent the drug mixing device from becoming unbalanced due to the flipping of the frame.

[0016] In the embodiment of the present application, a self-cleaning medicine mixing device for fireworks production is proposed, which includes a fixed frame, a frame, a turning mechanism, a conveying mechanism and a sealing mechanism installed on the frame. The conveying mechanism includes a conveyor belt fixedly connected below the sealing mechanism and a transmission device fixedly installed on the fixed frame. The conveyor belt is connected to the transmission device to transport the inner tube of the fireworks. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism. The turning mechanism includes a first cylinder fixedly installed on the fixed frame and a rotating shaft connecting the fixed frame and the frame. The first cylinder lifts one side of the frame and drives the frame in a horizontal position and the sealing mechanism and the conveyor belt fixed with the inner tube of the fireworks to reciprocate with the rotating shaft as the center. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism, and the medicine in the inner tube of the fireworks is fully mixed with the frame. The medicine mixing device can not only mix multiple medicines in the inner tube of the fireworks, but also automatically clean the powder adhering to the conveyor belt to ensure the safety of the equipment. The improved medicine mixing device has the following advantages: the device mixes the medicine in the inner tube of the fireworks, which can greatly reduce the risk of explosion. The conveyor belt has a self-cleaning function to prevent the risk of excessive dust adhesion, high mixing efficiency, and can increase production capacity. The entire set of equipment (including conveying) does not use motors and other equipment to ensure the safety of the equipment and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the present invention. It will be easy to recognize other embodiments and many expected advantages of the embodiments because they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding similar parts.

[0018] Figure 1 A three-dimensional diagram of a self-cleaning powder mixing device for fireworks production according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram showing a frame of a self-cleaning powder mixing device for fireworks production according to an embodiment of the present invention is in a horizontal position;

[0020] Figure 3A schematic diagram showing a self-cleaning powder mixing device for fireworks production according to an embodiment of the present invention when being lifted up;

[0021] Figure 4 A schematic diagram showing the combination of a conveyor belt and a cleaning drum of a self-cleaning powder mixing device for fireworks production according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram showing the separation of the conveyor belt and the cleaning drum of a self-cleaning powder mixing device for fireworks production according to an embodiment of the present invention is shown.

[0023] The numbers in the figure represent: 1 fixed frame; 2 frame; 3 turning mechanism; 4 conveying mechanism; 5 sealing mechanism; 41 conveyor belt; 42 transmission device; 31 first cylinder; 32 rotating shaft; 7 braking device; 51 sealing bracket; 52 sealing plate; 53 second cylinder; 54 third cylinder; 8 water tank; 9 cleaning drum; 10 water tank; 421 driving wheel; 422 idler wheel; 411 driven wheel; 11 first sensor; 12 second sensor; 13 first shock absorbing device; 14 second shock absorbing device; 15 counterweight. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] The embodiment of the present invention provides a self-cleaning powder mixing device for fireworks production, such as Figure 1As shown, the medicine mixing device includes a fixed frame 1, a frame 2, a turning mechanism 3, a conveying mechanism 4, and a sealing mechanism 5 installed on the frame 2. The conveying mechanism 4 includes a conveyor belt 41 fixedly connected below the sealing mechanism 5 and a transmission device 42 fixedly installed on the fixed frame 1. The conveyor belt 41 is connected with the transmission device 42 to transport the inner tube of the fireworks. The inner tube of the fireworks is sealed and fixed on the conveyor belt 41 by the sealing mechanism 5. The turning mechanism 3 includes a first cylinder 31 fixedly installed on the fixed frame 1 and a rotating shaft 32 connecting the fixed frame 1 and the frame 2. The first cylinder 31 lifts one side of the frame 2 and drives the frame 2 in a horizontal position and the sealing mechanism 4 and the conveyor belt 41 fixed with the inner tube of the fireworks to reciprocate with the rotating shaft 32 as the center. The inner tube of the fireworks is sealed and fixed on the conveyor belt 41 by the sealing mechanism 5, and is turned over together with the frame 2 so that the medicine in the inner tube of the fireworks is fully mixed. The conveyor belt 41 used in the medicine mixing device is a non-powered structure, which reduces the cost and also reduces the risk of explosion. Different from the traditional manual medicine mixing process of mixing the unpacked medicine first, the medicine mixing device of the present application can change the process of fireworks medicine mixing. In the medicine mixing process, only the amount of an inner cylinder of a cake can be mixed, thereby reducing the amount of mixed medicine and improving production safety.

[0027] In a specific embodiment, Figure 2 As shown, when one side of the frame 2 is lifted up, the transmission device 42 is disengaged from the conveyor belt 41. Figure 3 As shown, when the frame 2 returns to the horizontal position, the transmission device 42 and the conveyor belt 41 are connected to the transmission. Therefore, when the inner tube of the fireworks is fixed on the conveyor belt 41 by the sealing mechanism 5, the conveyor belt 41 stops rotating. In a preferred embodiment, the medicine mixing device also includes a brake device 7, which is connected to the conveyor belt 41 and controls the conveyor belt 41 to stop rotating when the inner tube of the fireworks is fixed. The brake device 7 stops the transmission of the conveyor belt 41 when the inner tube of the fireworks is blocked at the required position on the conveying surface on the upper side of the conveyor belt 41, which is conducive to fixing the inner tube of the fireworks on the conveyor belt 41. When one side of the frame 2 is lifted up, the transmission device 42 and the conveyor belt 41 stop transmitting. When the frame 2 returns to the horizontal position and repeats the reciprocating motion for 3 to 4 times, the medicine in the inner tube of the fireworks is fully mixed, and the transmission device 42 and the conveyor belt 41 are connected to the transmission, and the conveyor belt 41 continues to rotate to transport the mixed inner tube of the fireworks away.

[0028] In a specific embodiment, the sealing mechanism 5 includes a sealing bracket 51, a sealing plate 52, a second cylinder 53 and a third cylinder 54. The second cylinder 53 is arranged on the sealing bracket 51 to fix the inner cylinder of the fireworks at a desired position on the conveying surface on the upper side of the conveyor belt 41. The third cylinder 54 is fixed on the sealing bracket 51 and connected to the sealing plate 52 to control the sealing plate 52 to move in a direction perpendicular to the conveying surface of the conveyor belt 41. The second cylinder 53 blocks the inner cylinder of the fireworks at a desired position. The third cylinder 54 drives the sealing plate 52 to move by telescoping to fix the inner cylinder of the fireworks between the sealing plate 52 and the conveyor belt 41, so that the inner cylinder of the fireworks can be turned over together with the frame 2 later, and finally the mixing process of the inner cylinder of the fireworks is completed. The sealing bracket 51 is a part of the frame 2, and is used to support the sealing plate 52 to move in a direction perpendicular to the conveying surface of the conveyor belt 41, and fix the conveyor belt 41.

[0029] In a specific embodiment, Figure 4 As shown, the drug mixing device also includes a water tank 8 disposed below the conveyor belt 41 and a cleaning drum 9 partially immersed in the water tank 8. The cleaning drum 9 and the water tank 8 are fixed on the fixing frame 1. When the conveyor belt 41 is connected to the transmission device 42, the cleaning drum 9 contacts the transmission surface on the lower side of the conveyor belt 41. The conveyor belt 41 can be cleaned by the cleaning drum 9 and the water tank 8 during the transmission process, which greatly reduces the risks and safety hazards caused by the adhesion of gunpowder powder on the conveyor belt. In a preferred embodiment, the drug mixing device also includes a water tank 10, which is connected to the water tank 8 and supplies water to the water tank 8. The cleaning efficiency of the cleaning drum 9 is ensured by supplying water to the water tank 8 through the water tank 10. As shown Figure 1 As shown, the water tank 10 is separately arranged beside the fixing frame 1 .

[0030] In a specific embodiment, Figure 4 and Figure 5 As shown, the transmission device 42 includes a driving wheel 421 and an idler wheel 422 connected to the driving wheel 421. When the transmission device 42 and the conveyor belt 41 are connected to the transmission, the idler wheel 422 is connected to the driven wheel 411 on the conveyor belt 41. When the transmission device 42 and the conveyor belt 41 are disconnected from the transmission, the idler wheel 422 is separated from the driven wheel 411 on the conveyor belt 41. The transmission belt 41 in the transmission mechanism 4 is a non-powered mechanism, which reduces the cost and also reduces the risk of explosion.

[0031] In a specific embodiment, the medicine mixing device also includes a first sensor 11 and a second sensor 12. The first sensor 11 is arranged above the conveyor belt 41 to detect that the inner tube 3 of the fireworks reaches the desired position on the conveying surface on the upper side of the conveyor belt 41 and triggers a first instruction to stop the transmission of the conveyor belt 41. The second sensor 12 is fixed on the fixed frame 1 to detect the terminal position of the frame 2 being lifted and trigger a second instruction to make the frame 2 fall back to a horizontal position. Automatic operation can be achieved by detecting the position of the first sensor 11 and the second sensor 12 and triggering the movement of other mechanisms. In a preferred embodiment, the first sensor 11 and the second sensor 12 are photoelectric sensors, which are low in cost and have high detection accuracy.

[0032] In a specific embodiment, the medicine mixing device further comprises a first shock absorbing device 13 and a second shock absorbing device 14, which are fixed on the fixed frame 1 to perform shock absorption and buffering when the frame 2 is lifted to the end position and returned to the horizontal position. The first shock absorbing device 13 and the second shock absorbing device 14 can buffer and absorb shock at the starting position and the end position of the flipping of the frame 2 to ensure the stability of the medicine mixing device. In addition, a counterweight 15 is fixed on the other side of the frame 2. The counterweight 15 can play a balancing role when the frame 2 flips, so as to avoid the imbalance of the medicine mixing device due to the flipping of the frame 2.

[0033] Furthermore, the process flow of mixing medicine in the inner tube of fireworks by the above-mentioned medicine mixing device is as follows: when the inner tube of fireworks already filled with medicine enters the conveyor belt 41, after the first sensor 11 detects that the inner tube of fireworks is about to be in place, the second cylinder 53 extends to block the inner tube of fireworks at the required position on the conveyor belt 41, and then the conveyor belt 41 stops rotating through the brake device 7. The third cylinder 54 extends to drive the sealing plate 52 to press the inner tube of fireworks, and the first cylinder 31 extends to drive the inner tube of fireworks and the frame 2 to be lifted up. The conveyor belt 41 is connected to the frame 2 and also disengages the transmission. After the frame 2 is lifted up, it swings back to the horizontal position when passing the second sensor 12, and is buffered by the first shock absorbing device 13 and the second shock absorbing device 14 respectively. When the frame 2 moves, it flips up in a single direction. The sealing mechanism 5 plays a role in fixing the position of the inner tube of the firecracker and sealing it, and can swing with the frame 2. After repeating this action 3 to 4 times, the third cylinder 54 retreats and the transmission belt 41 and the transmission device 42 are connected to the transmission. The conveyor belt 41 continues to rotate to transport the inner tube of the firecracker with the mixed medicine away. Since the frame 2 has been prepared with left and right and upper and lower limits for rotation, it will automatically transmit when flipped down and no calibration is required, so the entire mixing process can be completed efficiently and safely.

[0034] During the drug mixing process, the conveyor belt 41 is driven by the driving wheel 421 to drive the idler wheel 422, and then the idler wheel 422 transmits the power to the driven wheel 411. When the frame 2 is turned up, the driven wheel 411 is separated from the idler wheel 422 and becomes unpowered. When the frame 2 falls back to the horizontal position, the driven wheel 411 contacts the idler wheel 422, and the conveyor belt 41 continues to rotate. When the conveyor belt 41 rotates, the cleaning drum 9 cleans the drug powder stuck on the conveyor belt 41. In this process, the water tank 10 supplies water to the water tank 8 to ensure the cleaning efficiency of the cleaning drum 9.

[0035] In the embodiment of the present application, a self-cleaning medicine mixing device for fireworks production is proposed, which includes a fixed frame, a frame, a turning mechanism, a conveying mechanism and a sealing mechanism installed on the frame. The conveying mechanism includes a conveyor belt fixedly connected below the sealing mechanism and a transmission device fixedly installed on the fixed frame. The conveyor belt is connected to the transmission device to transport the inner tube of the fireworks. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism. The turning mechanism includes a first cylinder fixedly installed on the fixed frame and a rotating shaft connecting the fixed frame and the frame. The first cylinder lifts one side of the frame and drives the frame in a horizontal position and the sealing mechanism and the conveyor belt fixed with the inner tube of the fireworks to reciprocate with the rotating shaft as the center. The inner tube of the fireworks is sealed and fixed on the conveyor belt by the sealing mechanism, and the medicine in the inner tube of the fireworks is fully mixed with the frame. The medicine mixing device can not only mix multiple medicines in the inner tube of the fireworks, but also automatically clean the powder adhering to the conveyor belt to ensure the safety of the equipment. The improved medicine mixing device has the following advantages: the device mixes the medicine in the inner tube of the fireworks, which can greatly reduce the risk of explosion. The conveyor belt has a self-cleaning function to prevent the risk of excessive dust adhesion, high mixing efficiency, and can increase production capacity. The entire set of equipment (including conveying) does not use motors and other equipment to ensure the safety of the equipment.

[0036] The above describes the specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The wording 'comprising' does not exclude the presence of elements or steps not listed in the claims. The wording 'one' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recorded in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference symbols in the claims should not be interpreted as limiting the scope.

Claims

1. A self-cleaning powder mixing device for fireworks production, characterized in that: The invention comprises a fixed frame, a frame, a turning mechanism, a conveying mechanism and a sealing mechanism installed on the frame, wherein the conveying mechanism comprises a conveyor belt fixedly connected below the sealing mechanism and a transmission device fixedly installed on the fixed frame, wherein the conveyor belt is connected with the transmission device to transport the inner tube of fireworks, and the inner tube of fireworks is sealed and fixed on the conveyor belt by the sealing mechanism, wherein the turning mechanism comprises a first cylinder fixedly installed on the fixed frame and a rotating shaft connecting the fixed frame and the frame, wherein the first cylinder lifts up one side of the frame and drives the frame in a horizontal position and the sealing mechanism and the conveyor belt fixed with the inner tube of fireworks to reciprocate with the rotating shaft as the center, when one side of the frame is lifted up, the transmission device is disengaged from the transmission of the conveyor belt, and when the frame returns to the horizontal position, the transmission device is connected to the transmission of the conveyor belt; the invention also comprises a water tank arranged below the conveyor belt and a cleaning roller partially immersed in the water tank, wherein the cleaning roller and the water tank are fixed on the fixed frame, and when the conveyor belt is connected with the transmission device, the cleaning roller contacts the conveying surface on the lower side of the conveyor belt.

2. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: The sealing mechanism includes a sealing bracket, a sealing plate, a second cylinder and a third cylinder. The second cylinder is arranged on the sealing bracket and is used to fix the inner tube of the firecracker at a desired position on the conveying surface on the upper side of the conveyor belt. The third cylinder is fixed on the sealing bracket and connected to the sealing plate to control the movement of the sealing plate in a direction perpendicular to the conveying surface of the conveyor belt.

3. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: Also included is a water tank, which is connected to the water tank and supplies water to the water tank.

4. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: The transmission device includes a driving wheel and an idler wheel connected to the driving wheel. When the transmission device and the conveyor belt are connected to each other for transmission, the idler wheel is connected to the driven wheel on the conveyor belt. When the transmission device and the conveyor belt are disconnected from each other for transmission, the idler wheel is separated from the driven wheel on the conveyor belt.

5. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: It also includes a first sensor and a second sensor. The first sensor is arranged above the conveyor belt to detect that the inner tube of the firecracker reaches the required position on the conveying surface on the upper side of the conveyor belt and triggers a first instruction to stop the transmission of the conveyor belt. The second sensor is fixed on the fixed frame to detect the end position of the frame being lifted and trigger a second instruction to make the frame fall back to a horizontal position.

6. The self-cleaning powder mixing device for fireworks production according to claim 5, characterized in that: It also includes a first shock absorbing device and a second shock absorbing device, which are fixed on the fixing frame to respectively absorb shock and buffer when the frame is lifted to the terminal position and returns to the horizontal position.

7. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: It also includes a brake device, which is connected to the conveyor belt and controls the conveyor belt to stop rotating when the firecracker inner tube is fixed.

8. The self-cleaning powder mixing device for fireworks production according to claim 1, characterized in that: A counterweight is fixed on the other side of the frame.

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