An automatic weighing and batching system for pyrotechnic compositions

Abstract

The utility model discloses a kind of automatic weighing of pyrotechnic composition system, it includes first batching room, second batching room, third batching room, first, second batching room inside is provided with weighing batching device;The weighing batching device includes rack, storage hopper, weighing hopper, belt conveyor, belt conveyor is horizontally set on rack, rack upper portion is fixedly installed with several storage hoppers along its length direction, the bottom of each storage hopper is provided with chute, electromagnetic vibrator is installed on chute;Several weighing hoppers corresponding to chute one-to-one are set along length direction above belt conveyor, the discharge opening of each chute is located above each weighing hopper, weighing sensor is set on weighing hopper, the discharge opening of weighing hopper bottom is hinged with hopper door by hinge, the hopper door of several weighing hoppers is all connected with opening and closing control device.The utility model is weighed to single raw material alone simultaneously, realize the separation between person and material, different materials, safe and reliable, high working efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pyrotechnics processing technology, and in particular relates to an automatic weighing and dispensing system for pyrotechnics. Background Technology

[0002] Pyrotechnics are mixtures that produce pyrotechnic effects such as light, sound, smoke, color, heat, and gas when burned. They consist of oxidizers (such as potassium nitrate and potassium chlorate), reducing agents (fuels such as sulfur and charcoal), binders, and additives. They are weakly explosive substances that primarily utilize their combustion reaction to produce visible light, infrared radiation, high heat, high-pressure gas, aerosol smoke, and sound effects. In the production of pyrotechnics, the ingredients need to be weighed and mixed. The weighing process is a core step in ensuring product performance and production safety. Because oxidizers are highly oxidizing and reducing agents are flammable, these two materials react violently under external energy stimulation upon contact. Furthermore, they are extremely sensitive to friction, impact, static electricity, and high temperatures; even a small energy input can trigger an explosion. Therefore, weighing operations must be performed in a strictly explosion-proof environment. In existing technologies, weighing areas require explosion-proof isolation spaces, explosion-proof equipment, and anti-static measures. Standardized operations are also necessary to reduce the risk of friction and impact. However, manual operation still presents potential safety hazards such as insufficient precision and incomplete static electricity elimination. Furthermore, oxidants are often corrosive, and reducing agents frequently exist in dust form. Sulfur dust can irritate the respiratory mucosa, and long-term exposure can easily lead to occupational health problems for operators. Current protective measures rely on closed weighing systems, personal protective equipment, and health monitoring. However, manually involved material transfer and weighing adjustments cannot completely prevent exposure to hazardous substances, and controlling the duration of a single operation and cumulative exposure time requires strict manual management, posing a risk of execution deviation.

[0003] Therefore, in response to the safety and explosion-proof requirements arising from the characteristics of oxidizers and reducing agents in the pyrotechnics weighing process, as well as occupational disease prevention requirements, there is an urgent need to develop technical solutions with higher automation and more reliable protective performance to solve the safety hazards and health risks caused by human intervention in existing operations. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide an automatic weighing and dispensing system for pyrotechnics that is simple in structure and effective in use.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: An automatic weighing and dispensing system for pyrotechnics includes a first dispensing room, a second dispensing room, and a third dispensing room. The first and second dispensing rooms are symmetrically arranged, with the third dispensing room located between them. Weighing and dispensing devices are installed in both the first and second dispensing rooms. Each weighing and dispensing device includes a frame, a storage hopper, a weighing hopper, and a belt conveyor. The belt conveyor is horizontally mounted on the frame, extending from the front to the rear end of the frame. Several storage hoppers are fixedly installed along the length of the frame, and each storage hopper has a chute at its bottom. The discharge port of each storage hopper is located at... Above the chute, an electromagnetic vibrator is installed on the chute and mounted on the frame via a connector. Above the belt conveyor, along its length, are several weighing hoppers corresponding to the chute. The discharge port of each chute is located above each weighing hopper. Each weighing hopper is equipped with a weighing sensor. The discharge port at the bottom of each weighing hopper is hinged to a hopper door. Both sides of the hopper door are provided with lugs, and springs are installed between the two lugs of the hopper door and the two sides of the weighing hopper. The hopper doors of the several weighing hoppers are connected to an opening and closing control device to control the opening and closing of each weighing hopper.

[0006] Furthermore, the aforementioned opening and closing control device includes an electric push rod, a crank arm, and a long rod. The output end of the electric push rod is hinged to one end of the crank arm, and the other end of the crank arm is connected to one end of the long rod. Several lever groups corresponding to the weighing hopper are evenly installed along the length of the long rod. Each lever group includes two levers, which are located on both sides of the weighing hopper, with one end connected to the long rod and the other end positioned above the lugs provided on the side walls of the hopper door.

[0007] Furthermore, several fixing seats are fitted onto the aforementioned long rod, and the fixing seats are connected to the frame.

[0008] Furthermore, there are several opening and closing control devices, each corresponding to one of the hopper doors of several weighing hoppers. Each opening and closing control device includes an electric push rod, a crank arm, and a connecting rod. The output end of the electric push rod is hinged to one end of the crank arm, and the other end of the crank arm is connected to one end of the connecting rod. The connecting rod is equipped with a lever assembly corresponding to one of the weighing hoppers. Each lever assembly includes two levers, which are located on both sides of the weighing hopper, with one end connected to the connecting rod and the other end positioned above the lugs provided on the side walls of the hopper door.

[0009] Furthermore, each of the aforementioned third batching rooms is equipped with a material collection hopper. The outer wall of the material collection hopper has two material receiving ports, which are respectively connected to the discharge ends of the two belt conveyors in the first and second batching rooms. At least one material bucket is provided below the material collection hopper.

[0010] Due to the adoption of the technical solution described above, this utility model has the following advantages: This automatic weighing and batching system for pyrotechnics features a rational structural design and simple operation. It weighs individual raw materials simultaneously, batching oxidizers and reductants separately in the first and second batching rooms, and transporting them via belt conveyors from each weighing and batching device. This effectively protects moving parts from the safety hazard of having both oxidizers and reductants adhering to them. Simultaneously, the weighed oxidizers and reductants can be collected in a single container or separately in different containers via a hopper in the third batching room, as needed. The batched materials can also be automatically fed directly into the mixer's feed hopper. The hopper gates of several weighing hoppers in the material handling unit are connected to an opening and closing control device, which can control the simultaneous opening and closing of the hopper gates of several weighing hoppers or their individual opening and closing, so that the material in multiple weighing hoppers or the material in at least one weighing hopper falls onto the belt conveyor at the same time, thereby eliminating mutual friction between materials during transportation and ensuring material safety. The operators complete the entire batching and mixing operation in the control room, and the remote control can effectively ensure personal safety. The mechanized operation realizes the separation of people and materials, as well as between different materials, making it safe, reliable, efficient, and highly automated, with good potential for widespread application. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the automatic weighing and dispensing system for pyrotechnics of this utility model; Figure 2 yes Figure 1 A three-dimensional structural diagram of the weighing and dispensing device in the diagram; Figure 3 yes Figure 2 A three-dimensional structural diagram of the storage hopper, weighing hopper, and opening / closing control device in the middle; Figure 4 yes Figure 3 A three-dimensional structural diagram of the storage hopper in the middle; Figure 5 yes Figure 3 A three-dimensional structural diagram of the opening and closing control device in the middle; Figure 6 yes Figure 1 A schematic diagram showing the usage status of the material collection hopper; In the diagram: 1 - Weighing and batching device; 2 - First batching chamber; 3 - Collection hopper; 4 - Third batching chamber; 5 - Second batching chamber; 6 - Storage hopper; 7 - Chute; 8 - Weighing hopper; 9 - Support leg; 10 - Frame; 11 - Belt conveyor; 12 - Opening and closing control device; 13 - Electromagnetic vibrator; 14 - Hinge; 15 - Hopper door; 16 - Support lug; 17 - Spring; 18 - Weighing sensor; 19 - Long rod; 20 - Fixed base; 21 - Crank arm; 22 - Electric push rod; 23 - Lever; 24 - Material bucket; 25 - Support leg; 26 - Water tank trolley. Detailed Implementation

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] like Figures 1-6 As shown, the automatic weighing and dispensing system for pyrotechnics includes a first dispensing room 2, a second dispensing room 5, and a third dispensing room 4. The first and second dispensing rooms are symmetrically arranged, with the third dispensing room located between them. The first dispensing room 2 is used for weighing and dispensing oxidizers, the second dispensing room 5 is used for weighing and dispensing reducing agents, and the third dispensing room is used to receive materials from the first and second dispensing rooms 2 and 5. Weighing and dispensing devices 1 are installed in both the first and second dispensing rooms. Each weighing and dispensing device includes a frame 10, a storage hopper 6, a weighing hopper 8, and a belt conveyor 11. Support legs 9 are fixedly installed at the four corners of the frame 10 to support the equipment. The belt conveyor 11 is horizontally arranged on the frame 10, extending from the front end to the rear end of the frame. Several supports are fixedly installed on the upper part of the frame along its length. Each hopper 6 has a chute 7 at its bottom, and the discharge port of the hopper is located above the chute. An electromagnetic vibrator 13 is installed on the chute 7 and is mounted on the frame 10 via a connector. Several weighing hoppers 8 are arranged along the length of the belt conveyor 11, corresponding one-to-one with the chute 7. The discharge port of each chute is located above each weighing hopper. The weighing hopper 8 is fixed to a weighing sensor 18, which is used to measure the weight of the material in the hopper. The discharge port at the bottom of the weighing hopper is hinged to a hopper door 15 via a hinge 14. The two side walls of the hopper door are provided with lugs 16, and springs 17 are installed between the two lugs of the hopper door and the two side walls of the weighing hopper. The hopper doors 15 of the several weighing hoppers 8 are connected to an opening and closing control device 12 to control the opening and closing of each weighing hopper.

[0014] The aforementioned opening and closing control device 15 includes an electric push rod 22, a crank arm 21, and a long rod 19. The output end of the electric push rod 22 is hinged to one end of the crank arm 21, and the other end of the crank arm is connected to one end of the long rod 19. Several lever groups, each corresponding to a weighing hopper 8, are evenly installed along the length of the long rod. Each lever group includes two levers 23, located on both sides of the weighing hopper, with one end connected to the long rod 19 and the other end positioned above the lugs 16 on both sides of the hopper door 15. Several fixing seats 20 are fitted onto the long rod 19, and the fixing seats are connected to the frame 10. The aforementioned opening and closing control device 15 is used to control the simultaneous opening and closing of the hopper doors 15 of each weighing hopper 8.

[0015] Each of the aforementioned third batching rooms 4 is equipped with a collection hopper 3. Two symmetrically arranged support legs 25 are fixedly installed on the outer wall of the collection hopper to support it. Two material receiving ports are opened on the outer wall of the collection hopper. The two material receiving ports are respectively connected to the discharge ends of the two belt conveyors in the first batching room 2 and the second batching room 5 to receive oxidant and reducing agent respectively. At least one material bucket 24 is set below the collection hopper 3. The material bucket is placed on a water trough trolley 26 of an automatic powder material mixer. The patent number of the "water trough trolley of an automatic powder material mixer" is ZL201710163453.X, which is a patent granted to the applicant.

[0016] The electromagnetic vibrator 13 drives the storage hopper 6 to vibrate via electromagnetic force, causing the material in the storage hopper 6 to flow along the chute into the weighing hopper 8. When the material in the weighing hopper reaches a set value, this set value is transmitted by the weighing sensor to the controller in the control room. The controller sends a signal to stop the electromagnetic vibrator 13 and simultaneously sends a signal to the electric push rod 22 of the opening and closing control device 12. The push rod end extends, driving the crank arm 21 to swing, which in turn drives the long rod 19 to rotate, thereby causing the levers 23 of several lever groups to engage with the hopper gate 15. The lugs 16 on both sides of the wall apply force to open the hopper door, and the material in the hopper 8 falls onto the conveyor belt of the belt conveyor 11. The material is then conveyed by the belt to the receiving port on the outer wall of the collecting hopper 3 in the third batching room 4, and then falls into the material bucket. Since the material bucket is placed on the water tank trolley 26 of an automatic powder material mixer, this patented technology can avoid safety accidents caused by friction. Moreover, by connecting or separating the material bucket from the discharge port of the automatic powder material mixer, it can prevent the material from spilling out during the discharge process.

[0017] Once the required material ratio is reached, the controller sends a signal to the electric push rod 22 of the opening and closing control device 12. The push rod end retracts, causing the crank arm 21 to swing and the long rod 19 to rotate in the opposite direction. Under the action of the spring 17, the hopper door closes and the lever 23 returns to its original position.

[0018] In the third batching room 4, oxidants and reducing agents are separately stored in different buckets, and then mixed in one container or separately stored in different containers.

[0019] The above-mentioned automatic weighing and batching system for pyrotechnics is used in the following steps: the oxidizer and the reducing agent are batched in the first batching room 2 and the second batching room 5 respectively through the weighing and batching device 1, and transported to the third batching room 4 by the corresponding belt conveyor 11. The materials are then collected in a container or divided into different containers via the collection hopper 3 of the third batching room.

[0020] This utility model's automatic pyrotechnics weighing and dispensing system also provides an additional type of opening and closing control device 15. Several opening and closing control devices are provided, each corresponding to one of the weighing hopper doors. Each device includes an electric push rod, a crank arm, and a connecting rod. The output end of the electric push rod is hinged to one end of the crank arm, and the other end of the crank arm is connected to one end of the connecting rod. The connecting rod is equipped with a set of levers corresponding to each weighing hopper. Each lever set includes two levers, located on either side of the weighing hopper, with one end connected to the connecting rod and the other end positioned above lugs on the side walls of the hopper door. This opening and closing control device is used to individually control the opening and closing of the hopper door of each weighing hopper.

[0021] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with the preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic weighing and dispensing system for pyrotechnics, characterized in that: It includes a first batching room, a second batching room, and a third batching room. The first and second batching rooms are symmetrically arranged, with the third batching room located between them. Weighing and batching devices are installed in both the first and second batching rooms. Each weighing and batching device includes a frame, a storage hopper, a weighing hopper, and a belt conveyor. The belt conveyor is horizontally mounted on the frame, extending from the front to the rear end. Several storage hoppers are fixedly installed along the length of the frame. Each storage hopper has a chute at its bottom, and the outlet of the storage hopper is located above the chute. A [unclear - possibly a device or structure] is installed on the chute. The conveyor is equipped with an electromagnetic vibrator, which is mounted on the frame via a connector. Several weighing hoppers, corresponding one-to-one with chutes, are arranged along the length of the belt conveyor. The discharge port of each chute is located above each weighing hopper. The weighing hoppers are fixed to a weighing sensor. A hopper door is hinged to the discharge port at the bottom of each hopper. Supports are provided on both sides of the hopper door, and springs are installed between the two supports of the hopper door and the side walls of the weighing hopper. The hopper doors of the several weighing hoppers are connected to an opening and closing control device to control the opening and closing of each hopper door.

2. The automatic weighing and dispensing system for pyrotechnics according to claim 1, characterized in that: The opening and closing control device includes an electric push rod, a crank arm, and a long rod. The output end of the electric push rod is hinged to one end of the crank arm, and the other end of the crank arm is connected to one end of the long rod. Several lever groups corresponding to the weighing hopper are evenly installed along the length of the long rod. Each lever group includes two levers, which are located on both sides of the weighing hopper. One end of each lever is connected to the long rod, and the other end is placed above the lugs provided on the side walls of the hopper door.

3. The automatic weighing and dispensing system for pyrotechnics according to claim 1, characterized in that: The opening and closing control device comprises several units, each corresponding to one of the hopper doors of several weighing hoppers. Each opening and closing control device includes an electric push rod, a crank arm, and a connecting rod. The output end of the electric push rod is hinged to one end of the crank arm, and the other end of the crank arm is connected to one end of the connecting rod. The connecting rod is equipped with a lever assembly corresponding to one of the weighing hoppers. Each lever assembly includes two levers, which are located on both sides of the weighing hopper, with one end connected to the connecting rod and the other end positioned above the lugs provided on the side walls of the hopper door.

4. The automatic weighing and dispensing system for pyrotechnics according to claim 1, characterized in that: Each of the third batching rooms is equipped with a material collection hopper. The outer wall of the material collection hopper has two material receiving ports, which are respectively connected to the discharge ends of the two belt conveyors in the first batching room and the second batching room. At least one material bucket is set below the material collection hopper.

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