Automatic weighing and dust diffusion preventing device for tire carbon black

Abstract

This utility model provides an automatic weighing device for preventing the diffusion of carbon black in tire production, belonging to the field of carbon black production technology. The device includes a storage cylinder, a weighing cylinder, a sealing cap, and a conveying pipe. The storage cylinder is shaped like an inverted frustum, with a rectangular outlet at its bottom. The weighing cylinder is positioned below the storage cylinder, with a rectangular inlet at its top corresponding to the outlet at the bottom. The weighing cylinder is cylindrical. The sealing cap is connected to the bottom of the storage cylinder via a hinge shaft, the axis of which is parallel to the long side of the rectangular outlet. The sealing cap is used to open or close the rectangular outlet at the bottom of the storage cylinder. One end of the conveying pipe is connected to the side wall of the weighing cylinder, and the conveying pipe is L-shaped. The other end of the conveying pipe extends downwards at an angle. This utility model solves the problem in the prior art where carbon black weighing during tire production causes carbon black dust to diffuse into the surrounding environment, resulting in additional production costs and safety hazards.

Description

Technical Field

[0001] This utility model belongs to the field of carbon black production technology, specifically, it relates to an automatic weighing device for tire carbon black to prevent dust diffusion. Background Technology

[0002] In modern tire manufacturing processes, carbon black is widely used in rubber formulations as an important reinforcing filler. The amount of carbon black added directly affects key performance indicators such as tire strength, wear resistance, and service life. Therefore, accurate weighing of carbon black is necessary during production to ensure stable product quality. Traditional carbon black weighing methods mainly rely on manual operation. Workers use shovels or spoons to take carbon black from storage containers and pour it onto platform scales or electronic scales for weighing. This method is labor-intensive, inefficient, and difficult to guarantee weighing accuracy. More seriously, carbon black powder has an extremely small particle size, usually between 10nm and 500nm, with a large specific surface area and low density. During transfer and weighing, it is very easy to fly and spread, forming a black dust cloud. A large amount of carbon black dust not only pollutes the production workshop environment, reduces visibility, and accumulates dust on equipment surfaces, but can also be inhaled by operators, causing health damage.

[0003] To improve this situation, some companies have begun to adopt semi-automatic weighing equipment, using pneumatic conveying or screw conveying to transport carbon black to the weighing device. However, these methods still have dust leakage problems at the material inlet and outlet. Some companies have installed local dust collection devices to try to remove the diffused dust. However, dust collection devices require additional power systems and filtration devices, increasing equipment investment and operating costs. Moreover, the dust collection effect is affected by airflow organization and often cannot completely eliminate dust diffusion. Therefore, there is a lack of a simple technical solution that can effectively prevent dust diffusion throughout the entire carbon black weighing process without relying on complex auxiliary equipment. Utility Model Content

[0004] In view of this, the present invention provides an automatic weighing device for carbon black in tire production to prevent dust diffusion. This device solves the problem that in the existing technology, the weighing of carbon black in tire production is usually carried out manually or semi-automatically. During the material transfer and weighing process, due to the extremely fine carbon black powder and its strong flying characteristics, a large amount of carbon black dust diffuses into the surrounding environment. This not only causes waste of raw materials and weighing errors, but also seriously pollutes the air environment of the production workshop, endangering the health of operators. At the same time, the diffused dust adheres to the surface of the equipment, affecting the normal operation and maintenance of the equipment, increasing production costs and safety hazards.

[0005] This utility model is implemented as follows:

[0006] This utility model provides an automatic weighing device for preventing dust diffusion of carbon black in tires, comprising a storage cylinder, a weighing cylinder, a sealing cap, and a conveying pipe; the storage cylinder is shaped like an inverted frustum, with a rectangular discharge port at its bottom; the weighing cylinder is positioned below the storage cylinder, with a rectangular inlet corresponding to the discharge port at the bottom of the storage cylinder at its top, and the weighing cylinder is cylindrical; the sealing cap is connected to the bottom of the storage cylinder via a hinge shaft, the axis of which is parallel to the long side of the rectangular discharge port, and the sealing cap is used to open or close the rectangular discharge port at the bottom of the storage cylinder; one end of the conveying pipe is connected to the side wall of the weighing cylinder, the conveying pipe is L-shaped and curved, and the other end of the conveying pipe extends downward at an angle.

[0007] The technical effects of the automatic weighing and dust diffusion prevention device for tire carbon black provided by this utility model are as follows: The storage cylinder, with its inverted frustum design and rectangular discharge port at the bottom, allows the carbon black material to naturally converge towards the discharge port under gravity, preventing material accumulation and stagnation inside the cylinder. The sealing cover, connected by a hinge shaft, enables opening and closing, ensuring that no dust diffusion occurs during storage and weighing. The weighing cylinder is positioned below the storage cylinder and receives the material through a rectangular inlet, forming a closed material transmission channel. The L-shaped curved structure of the conveying pipe ensures that the material is smoothly transported to the downstream process after weighing. The overall structure is simple and reliable, effectively preventing carbon black dust from diffusing and polluting the environment during weighing.

[0008] Based on the above technical solution, the automatic weighing and dust diffusion prevention device for tire carbon black of this utility model can be further improved as follows:

[0009] The diameter of the upper bottom surface of the inverted frustum-shaped structure of the storage cylinder is larger than the diameter of the lower bottom surface, and the angle between the side wall of the storage cylinder and the vertical direction is 15°~30°.

[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the diameter of the upper bottom surface of the inverted frustum structure of the storage cylinder is larger than that of the lower bottom surface, and the side wall forms a specific angle with the vertical direction, which allows the carbon black material to slide smoothly in the cylinder without sticking to the side wall or forming material bridges. This ensures that the material can flow completely to the discharge port, improves the material flowability and emptying rate, and reduces material residue. At the same time, this angle design also facilitates cleaning and maintenance, ensuring the accuracy of weighing and the continuous and stable operation of the device.

[0011] Furthermore, the longer side of the rectangular discharge port is larger than the shorter side, and the geometric center of the rectangular discharge port coincides with the geometric center of the circular surface at the bottom of the storage cylinder.

[0012] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design of the long side of the rectangular discharge port being larger than the short side gives the discharge port a larger passing area, which facilitates the rapid flow of carbon black material. At the same time, the rectangular shape is easier to completely seal the cap compared to the circular shape. The geometric center of the discharge port coincides with the geometric center of the circular surface at the bottom of the storage cylinder, ensuring that the material can flow evenly to the center of the discharge port, avoiding uneven feeding caused by flow deviation, improving the stability and controllability of material flow during the weighing process, and ensuring that the amount of material weighed each time is accurate and consistent.

[0013] Furthermore, the sealing cap is in the shape of a rectangular plate, with the long side of the sealing cap being larger than the long side of the rectangular discharge port, and the short side of the sealing cap being larger than the short side of the rectangular discharge port.

[0014] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the sealing cover is rectangular plate-shaped and its size is larger than that of the rectangular discharge port, so that the sealing cover can completely cover the discharge port and form a sealing overlap area around it, effectively preventing carbon black dust from escaping from the edge of the discharge port. When the sealing cover is closed, it can fit tightly with the bottom of the storage cylinder to form a tight sealed space to prevent dust diffusion. At the same time, the rectangular plate-shaped structure has sufficient rigidity and is not easy to deform when bearing the weight of the material, ensuring the reliability and long-term stability of the sealing effect.

[0015] Furthermore, the outer surface of the sealing cap is provided with raised reinforcing ribs along the short side direction. The reinforcing ribs are trapezoidal in cross-section, and there are 3 to 5 reinforcing ribs. Each reinforcing rib is evenly distributed along the long side direction of the sealing cap.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the trapezoidal cross-section reinforcing ribs set along the short side of the outer surface of the sealing cover can significantly improve the bending stiffness of the sealing cover and prevent the sealing cover from bending and deforming when subjected to the pressure of carbon black material in the storage cylinder. The uniform distribution of 3 to 5 reinforcing ribs makes the sealing cover uniformly stressed as a whole, avoiding deformation or damage caused by local stress concentration. The trapezoidal cross-section design gives the reinforcing ribs good compressive strength, ensuring that the sealing cover remains flat during long-term repeated opening and closing, maintaining good sealing performance, and effectively preventing dust from leaking from deformation gaps.

[0017] Furthermore, the inner diameter of the cylindrical structure of the weighing cylinder is larger than the long side of the discharge port at the bottom of the storage cylinder, and the ratio of the height of the weighing cylinder to its inner diameter is 1.5 to 2.0.

[0018] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the inner diameter of the weighing cylinder's cylindrical structure is larger than the long side of the material outlet of the storage cylinder, which allows the carbon black material falling from the storage cylinder to completely enter the weighing cylinder without overflowing or impacting the cylinder wall to generate dust. The specific ratio design of the weighing cylinder's height to its inner diameter ensures sufficient volume to accommodate the material to be weighed, while also making the internal space of the cylinder relatively compact, reducing the diffusion and splashing of the material during the falling process. The cylindrical structure facilitates the uniform accumulation of material inside the cylinder, improving the accuracy of weighing. At the same time, this structure also facilitates the installation of a weighing sensor to realize the automatic weighing function.

[0019] Furthermore, the L-shaped curved structure of the conveying pipe includes a horizontal section and an inclined section. The horizontal section is vertically connected to the side wall of the weighing cylinder, the angle between the inclined section and the horizontal section is 90°, and the angle between the inclined section and the vertical direction is 40°~50°.

[0020] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the horizontal section of the L-shaped curved structure of the conveying pipe is vertically connected to the weighing cylinder, which allows the material to smoothly enter the conveying pipe from the side wall of the weighing cylinder. The inclined section forms a 90° angle with the horizontal section and maintains a specific inclination angle with the vertical direction, which allows the material to slide smoothly down the inclined section under the action of gravity, avoiding the accumulation and blockage of material in the pipe. This curved design also plays a buffering role, reducing the material flow speed, reducing the friction and collision between the material and the pipe wall, further preventing dust generation, ensuring the complete conveying of materials and the cleanliness of the environment.

[0021] Furthermore, the axis of the hinge shaft is located outside the circular surface at the bottom of the storage cylinder, and the distance between the axis of the hinge shaft and the long side of the rectangular discharge port is less than half the size of the short side of the rectangular discharge port.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the hinge axis is located outside the circular surface at the bottom of the storage cylinder and maintains a specific distance from the long side of the rectangular discharge port, so that the sealing cover can rotate to open and close with the hinge axis as the fulcrum. When the sealing cover is open, it can completely move away from the discharge port and will not obstruct the material from falling. When the sealing cover is closed, it can fall smoothly and completely cover the discharge port. This positional design makes the movement trajectory of the sealing cover reasonable during rotation, and the operation is effortless and smooth. At the same time, the setting of the hinge axis also ensures that the sealing cover is always connected to the storage cylinder and will not be lost or fall off, which is convenient for repeated use and long-term maintenance.

[0023] Furthermore, the storage cylinder is made of stainless steel, the weighing cylinder is made of stainless steel, the sealing cap is made of aluminum alloy, and the conveying pipe is made of stainless steel.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the storage cylinder, weighing cylinder and conveying pipe are made of stainless steel, which has excellent corrosion resistance and oxidation resistance, and can withstand long-term contact with carbon black materials without rusting or surface damage. The surface of stainless steel is smooth and does not easily adhere to carbon black powder, making it easy to clean and maintain. The sealing cover is made of aluminum alloy, which ensures sufficient strength while having a light weight, making it easy to frequently open and close operations and reducing the operating burden. The reasonable selection of materials for each component ensures the durability and reliability of the device, while also taking into account the convenience and economy of actual use.

[0025] Furthermore, the bottom of the weighing cylinder is closed, the inner surface of the bottom of the weighing cylinder is flat, and the center line of the connection between the horizontal section of the conveying pipe and the side wall of the weighing cylinder is located at the lower third of the height direction of the weighing cylinder.

[0026] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the bottom of the weighing cylinder is closed and the inner surface is flat, so that the bottom of the carbon black material is flat and stable when it accumulates in the weighing cylinder, which facilitates accurate weighing of the material. The horizontal section of the conveying pipe is connected at one-third of the height of the weighing cylinder, so that when the material in the weighing cylinder reaches the weighing requirement, it can be smoothly discharged through the conveying pipe. This position design ensures that the inlet of the conveying pipe is always located in the material accumulation area, avoiding material blockage or poor discharge during conveying. At the same time, the closed bottom structure also prevents carbon black dust from leaking from the bottom. Combined with the overall sealing design, dust diffusion control is achieved throughout the entire process.

[0027] Compared with existing technologies, the beneficial effects of this utility model's automatic weighing and dust-prevention device for tire carbon black are as follows: Through the structural design of the storage cylinder, weighing cylinder, sealing cover, and conveying pipe, a fully enclosed material handling system is constructed, encompassing storage, weighing, and conveying. The inverted frustum-shaped structure of the storage cylinder, combined with the rectangular discharge port at the bottom, ensures smooth material collection and outflow. The sealing cover, connected by a hinge shaft, achieves flexible and reliable opening and closing control. During storage, the discharge port is completely sealed to prevent dust leakage. During weighing, the sealing cover is opened, allowing the material to fall directly into the weighing cylinder below. The entire material transfer process is completed within a closed space. The cylindrical structure of the weighing cylinder and the... The rational size design ensures complete material reception and accurate weighing. The L-shaped curved structure of the conveying pipe smoothly transports the material to the downstream process after weighing, avoiding secondary exposure of the material and the generation of dust. Compared with the prior art, this utility model does not require a complex control system and auxiliary dust collection equipment. It achieves dust prevention throughout the entire carbon black weighing process through only reasonable structural design and component coordination. The device has a simple and reliable structure, is easy to manufacture and maintain, and has a significant and reliable sealing effect. It effectively protects the production environment and the health of operators, improves the accuracy and production efficiency of carbon black weighing, and reduces raw material waste and equipment maintenance costs. It has good practical value and prospects for promotion and application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A three-dimensional structural schematic diagram of an automatic weighing device for tire carbon black to prevent dust diffusion.

[0030] Figure 2 A side view of an automatic weighing device for preventing the spread of carbon black in tires;

[0031] Figure 3 A schematic diagram of a double-door implementation of an automatic weighing and dust-prevention device for tire carbon black;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 10. Storage cylinder; 11. Weighing cylinder; 12. Sealing cap; 13. Conveying pipe; 14. Rectangular discharge port; 15. Rectangular inlet port; 16. Reinforcing rib; 17. Horizontal section; 18. Inclined section; 19. Hinge shaft. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figure 1 Figure 2 shows an embodiment of an automatic weighing device for preventing dust diffusion of tire carbon black provided by this utility model. In this embodiment, it includes a storage cylinder 10, a weighing cylinder 11, a sealing cover 12, and a conveying pipe 13. The storage cylinder is shaped like an inverted frustum, and a rectangular discharge port 14 is opened at the bottom of the storage cylinder. The weighing cylinder is located below the storage cylinder, and a rectangular inlet port 15 corresponding to the discharge port at the bottom of the storage cylinder is opened at the top of the weighing cylinder. The weighing cylinder is cylindrical. The sealing cover is connected to the bottom of the storage cylinder through a hinge shaft 19. The axis of the hinge shaft is parallel to the long side of the rectangular discharge port. The sealing cover is used to open or close the rectangular discharge port at the bottom of the storage cylinder. One end of the conveying pipe is connected to the side wall of the weighing cylinder. The conveying pipe is L-shaped and curved. The other end of the conveying pipe extends downward at an angle.

[0036] In the above technical solution, the diameter of the upper bottom surface of the inverted frustum-shaped structure of the storage cylinder is larger than the diameter of the lower bottom surface, and the angle between the side wall of the storage cylinder and the vertical direction is 15°~30°.

[0037] Furthermore, in the above technical solution, the long side of the rectangular discharge port is larger than the short side, and the geometric center of the rectangular discharge port coincides with the geometric center of the circular surface at the bottom of the storage cylinder.

[0038] Furthermore, in the above technical solution, the sealing cover is in the shape of a rectangular plate, with the long side of the sealing cover being larger than the long side of the rectangular discharge port, and the short side of the sealing cover being larger than the short side of the rectangular discharge port.

[0039] Optionally, the outer perimeter of the rectangular feed inlet is larger than that of the rectangular discharge outlet, and the outer edge is higher than that of the rectangular discharge outlet to achieve a wrapping effect; or a flange or other connecting mechanism can be used for docking installation.

[0040] like Figure 3 As shown, the sealing cover and hinge shaft can adopt a double-door design to further prevent material leakage. The symmetrical sealing covers on both sides are provided with a male-female mating structure, which can achieve a tight seal when closed. The hinge shaft is connected to the drive motor through a transmission mechanism, and the sealing cover is fixedly connected to the rotating shaft of the hinge shaft to realize electric control switch.

[0041] Furthermore, in the above technical solution, the outer surface of the sealing cover is provided with raised reinforcing ribs 16 along the short side direction. The reinforcing ribs are trapezoidal in cross-section, and there are 3 to 5 reinforcing ribs. Each reinforcing rib is evenly distributed along the long side direction of the sealing cover.

[0042] Furthermore, in the above technical solution, the inner diameter of the cylindrical structure of the weighing cylinder is larger than the long side of the discharge port at the bottom of the storage cylinder, and the ratio of the height of the weighing cylinder to the inner diameter of the weighing cylinder is 1.5~2.0.

[0043] Furthermore, in the above technical solution, the L-shaped curved structure of the conveying pipe includes a horizontal section 17 and an inclined section 18. The horizontal section is vertically connected to the side wall of the weighing cylinder, the angle between the inclined section and the horizontal section is 90°, and the angle between the inclined section and the vertical direction is 40°~50°.

[0044] Furthermore, in the above technical solution, the axis of the hinge shaft is located outside the circular surface at the bottom of the storage cylinder, and the distance between the axis of the hinge shaft and the long side of the rectangular discharge port is less than half the size of the short side of the rectangular discharge port.

[0045] Furthermore, in the above technical solution, the storage cylinder is made of stainless steel, the weighing cylinder is made of stainless steel, the sealing cap is made of aluminum alloy, and the conveying pipe is made of stainless steel.

[0046] Furthermore, in the above technical solution, the bottom of the weighing cylinder is closed, the inner surface of the bottom of the weighing cylinder is planar, and the center line of the connection between the horizontal section of the conveying pipe and the side wall of the weighing cylinder is located at the lower third of the height direction of the weighing cylinder.

[0047] The method of using this utility model is as follows: Before use, first install the storage cylinder onto the workbench using a bracket, ensuring the storage cylinder is in a stable vertical position. Place the weighing cylinder directly below the storage cylinder and connect and fix it using the same bracket, aligning the rectangular inlet of the weighing cylinder with the rectangular outlet of the storage cylinder vertically. Check whether the hinge connection between the sealing cap and the bottom of the storage cylinder is flexible and reliable, confirming that the sealing cap can open smoothly and close completely. Connect and fix one end of the conveying pipe to the connection port on the side wall of the weighing cylinder, and extend the other end of the conveying pipe to the inlet of the downstream mixing equipment or storage container. During use, first ensure that the sealing cap is closed, completely sealing the outlet at the bottom of the storage cylinder. Then, put the carbon black material to be weighed into the storage cylinder from the opening at the top of the storage cylinder. The carbon black material naturally accumulates in the inverted frustum-shaped cylinder. Since the bottom of the storage cylinder is sealed by the sealing cap, the material is temporarily stored inside the cylinder and will not fall. At this time, even if a small amount of dust is generated during the feeding process, it is confined to the internal space of the storage cylinder. When it is necessary to perform... During weighing, the operator opens the sealing cover and rotates it outward around the hinge axis to the fully open position. At this time, the discharge port at the bottom of the storage cylinder is open, and the carbon black material stored in the cylinder flows out through the rectangular discharge port under the action of gravity and falls directly into the weighing cylinder below. The material falling process is completed in the narrow space between the storage cylinder and the weighing cylinder, isolated from the external environment, so no dust will be generated. When the weight of the material in the weighing cylinder reaches the preset weighing requirement, the operator immediately closes the sealing cover to prevent more material from falling. At this time, the weighing cylinder has contained the accurately weighed carbon black material. Next, the unloading device at the bottom or side of the weighing cylinder is opened, allowing the material in the weighing cylinder to flow to the downstream process through the conveying pipe. The material slides smoothly down along the L-shaped channel in the conveying pipe. The entire unloading process is also carried out in a closed pipe, which will not cause dust leakage. After completing one weighing and conveying cycle, the sealing cover is closed again and new carbon black material is added to the storage cylinder. Repeating the above operation can achieve continuous automatic weighing.

[0048] The following is a specific embodiment of this utility model: In this embodiment, the storage cylinder is formed by stamping and welding of 304 stainless steel sheet. The storage cylinder has an integral structure in the shape of an inverted frustum. The upper bottom surface is a circular opening with a diameter of 600mm, the lower bottom surface has a diameter of 400mm, the height of the storage cylinder is 800mm, the angle between the side wall and the vertical direction is 20°, and a cover can be detachably installed at the top. A rectangular discharge port is opened at the center of the circular bottom surface of the storage cylinder. The long side of the rectangular discharge port is 200mm and the short side is 80mm. A 20mm high flange extends downward around the discharge port to enhance the structural strength and facilitate the installation of the sealing cover. The weighing cylinder is also made of 304 stainless steel sheet by rolling and welding. The weighing cylinder has a cylindrical shape with an inner diameter of 450mm, a height of 750mm, and a wall thickness of 3mm. The rectangular inlet at the top of the weighing cylinder has the same size as the outlet at the bottom of the storage cylinder. The weighing cylinder measures 200mm x 80mm and has a completely enclosed flat bottom structure with a 5mm thick base plate to support the weight of the material. A 100mm diameter circular connection hole is located 250mm above the bottom on the side wall of the weighing cylinder for connecting the conveying pipe. The sealing cap is made of 6061 aluminum alloy sheet, cut into rectangular shape with a long side of 250mm, a short side of 130mm, and a thickness of 8mm. The sealing cap is 25mm larger than the rectangular discharge port on all four sides, forming a sealing overlap. Four reinforcing ribs are welded along the short side of the outer surface of the sealing cap. Each rib has a trapezoidal cross-section with a top width of 15mm, a bottom width of 30mm, and a height of 20mm. The four reinforcing ribs are evenly spaced 50mm apart along the long side of the sealing cap. The hinge axis is parallel to the long side of the rectangular discharge port. The conveying pipe is made of 304 stainless steel tubing, with an inner diameter of 95mm and a wall thickness of 2mm.The 5mm thick conveying pipe has an L-shaped structure, consisting of a 300mm horizontal section and a 1200mm inclined section. The horizontal section connects to the connection hole on the side wall of the weighing cylinder via a flange. The inclined section is welded to the horizontal section to form a 90° right-angle bend. The angle between the inclined section and the vertical direction is 45°, allowing the material to slide smoothly under gravity. When the entire device is working, the storage cylinder can hold approximately 150kg~180kg of carbon black material, and the weighing cylinder has a single weighing capacity of 50kg~70kg. The sealing cover can open at an angle of 110°~120° without obstructing the material's fall. When closed, the sealing cover fits tightly against the perimeter of the discharge port under its own weight. The device features a tight fit, with a 25mm overlap area forming an effective labyrinthine seal. In practical applications, the material flows from the storage cylinder into the weighing cylinder in approximately 8-12 seconds, and after weighing, it exits through the conveying pipe in approximately 15-20 seconds. The entire weighing cycle can be completed in 40-50 seconds. All components are securely connected and operate stably. The smooth stainless steel surface facilitates cleaning, and the lightweight and flexible aluminum alloy sealing cover reduces operating effort. The overall structure is compact and occupies little space, meeting the actual needs of tire production workshops for automatic carbon black weighing. No significant dust diffusion was observed during use, resulting in a significant improvement in workshop cleanliness.

[0049] The following is another specific embodiment 2 of this utility model: This embodiment is based on embodiment 1, and improves the sealing structure between the sealing cap and the bottom of the storage cylinder. A silicone rubber sealing strip is pasted on the upper surface of the flange around the rectangular discharge port at the bottom of the storage cylinder. The sealing strip is made of food-grade silicone rubber material with a Shore A hardness of 40-50 Shore A. The sealing strip has a rectangular cross-section with a width of 15 mm and a height of 5 mm. The sealing strip forms a closed rectangular frame around the discharge port. The sealing strip is firmly bonded to the flange surface with a special silicone rubber adhesive. When the sealing cap is closed, the inner surface of the sealing cap directly presses on the silicone rubber sealing strip. The sealing strip is under pressure. Under the action of elastic deformation, it fully fills the tiny gap between the sealing cover and the periphery of the discharge port, forming a tighter sealing contact. The silicone rubber material has excellent elastic recovery performance and aging resistance, and can maintain a good sealing effect during repeated opening and closing. At the same time, the silicone rubber material does not react chemically with carbon black powder and will not contaminate the material. This improvement measure further improves the sealing reliability of the device. Even after long-term use, when tiny gaps are generated between the sealing cover and the periphery of the discharge port due to wear, the silicone rubber sealing strip can still achieve effective sealing through elastic deformation, extending the service life and maintenance cycle of the device. In practical applications, this improved structure makes the dustproof performance of the device more reliable and stable.

[0050] The following is another specific embodiment 3 of this utility model: This embodiment is based on embodiment 1, and the structure of the conveying pipe is optimized and improved. An arc-shaped guide plate is welded and installed on the inner rounded corner area where the horizontal section and the inclined section intersect at the inner side of the L-shaped bend of the conveying pipe. This guide plate is made of 2mm thick 304 stainless steel sheet, bent into shape. The arc radius of the guide plate is 80mm, and the central angle of the guide plate extending along the inner circumference of the conveying pipe is 90°. A smooth transition surface is formed between the guide plate and the inner wall of the conveying pipe. When the carbon black material enters the conveying pipe from the weighing cylinder through the horizontal section, it is guided by the guide plate at the bend, changing its flow direction. The material smoothly transitions into the inclined section along the arc surface of the guide plate, avoiding direct impact of the material on the inner wall of the bend. The design of the baffle plate reduces flow turbulence and dust generation. It ensures a more uniform and stable flow velocity at bends, reducing collisions and friction between material particles and between the material and the pipe wall, further minimizing dust generation. The curved design of the baffle plate also reduces material stagnation and accumulation at bends, improving the continuity and smoothness of material transport. This improved structure reduces the time it takes for material to pass through the conveying pipe by approximately 20% to 30%, increasing the overall efficiency of weighing and conveying. During long-term use, the smooth surface of the baffle plate makes it easy to clean and maintain, as it does not easily accumulate material. This optimized design allows the device to maintain good dustproof performance while further improving the stability and reliability of material transport, making it suitable for tire production lines with high production cycle requirements.

[0051] Specifically, the principle of this utility model is as follows: By establishing a closed material flow channel, the path of carbon black dust diffusion into the external environment is fundamentally blocked. The storage cylinder adopts an inverted frustum-shaped structure, and the angle formed by its side wall and the vertical direction allows the carbon black material to overcome internal friction and adhesion under the action of gravity and slide naturally to the bottom outlet, avoiding material accumulation and material bridge formation on the cylinder wall. The rectangular outlet design ensures sufficient passage area and facilitates complete coverage by the sealing cap. The sealing cap is connected to the bottom of the storage cylinder via a hinge shaft. The position of the hinge shaft is precisely designed so that the sealing cap can be completely away from the outlet when opened, without obstructing the material from falling, and can fit tightly with the periphery of the outlet when closed to form an effective seal. The reinforcing ribs on the sealing cap improve the rigidity of the cover plate and prevent deformation under material pressure, which could lead to seal failure. The weighing cylinder is located directly below the storage cylinder, and its inner diameter is larger than the long side of the outlet, ensuring that the carbon black material flows smoothly from the storage cylinder. The material falling from the cylinder can completely enter the weighing cylinder without splashing out. The cylindrical structure and reasonable height-to-diameter ratio of the weighing cylinder allow the material to accumulate stably inside, reducing violent mixing with air and dust generation during the falling process. The connection between the conveying pipe and the side wall of the weighing cylinder is located at the bottom of the cylinder. When weighing is complete and unloading is required, the material flows out smoothly through the L-shaped channel of the conveying pipe. The curved pipe structure acts as a buffer and guide, reducing the material flow rate and friction and collision with the pipe wall, thereby suppressing dust generation. Throughout the entire process from storage to weighing to conveying, the carbon black material always flows in a closed or semi-closed space, without any opportunity to directly contact the external atmospheric environment. Therefore, dust cannot diffuse outward. This purely mechanical dust prevention method does not require a power-driven dust collection device. Reliable dust prevention is achieved by relying on reasonable geometry and component matching, which conforms to the engineering design principles of simplicity, practicality, economy and efficiency.

Claims

1. An automatic weighing device for tire carbon black to prevent dust diffusion, characterized in that, It includes a storage cylinder, a weighing cylinder, a sealing cap, and a conveying pipe; the storage cylinder is shaped like an inverted frustum, with a rectangular discharge port at its bottom; the weighing cylinder is located below the storage cylinder, with a rectangular inlet at its top corresponding to the discharge port at the bottom of the storage cylinder, and the weighing cylinder is cylindrical; the sealing cap is connected to the bottom of the storage cylinder via a hinge shaft, the axis of which is parallel to the long side of the rectangular discharge port, and the sealing cap is used to open or close the rectangular discharge port at the bottom of the storage cylinder; one end of the conveying pipe is connected to the side wall of the weighing cylinder, the conveying pipe is L-shaped and curved, and the other end of the conveying pipe extends downward at an angle.

2. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 1, characterized in that, The diameter of the upper base of the inverted frustum-shaped structure of the storage cylinder is larger than the diameter of the lower base, and the angle between the side wall of the storage cylinder and the vertical direction is 15°~30°.

3. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 2, characterized in that, The longer side of the rectangular discharge port is larger than the shorter side, and the geometric center of the rectangular discharge port coincides with the geometric center of the circular surface at the bottom of the storage cylinder.

4. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 3, characterized in that, The sealing cap is rectangular in shape, with the long side of the sealing cap being larger than the long side of the rectangular discharge port, and the short side of the sealing cap being larger than the short side of the rectangular discharge port.

5. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 4, characterized in that, The outer surface of the sealing cap is provided with raised reinforcing ribs along the short side. The reinforcing ribs are trapezoidal in cross-section and there are 3 to 5 reinforcing ribs. The reinforcing ribs are evenly distributed along the long side of the sealing cap.

6. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 5, characterized in that, The inner diameter of the weighing cylinder is larger than the long side of the discharge port at the bottom of the storage cylinder, and the ratio of the height of the weighing cylinder to its inner diameter is 1.5 to 2.

0.

7. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 6, characterized in that, The L-shaped curved structure of the conveying pipe includes a horizontal section and an inclined section. The horizontal section is vertically connected to the side wall of the weighing cylinder. The angle between the inclined section and the horizontal section is 90°, and the angle between the inclined section and the vertical direction is 40°~50°.

8. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 7, characterized in that, The axis of the hinge shaft is located on the outside of the circular surface at the bottom of the storage cylinder, and the distance between the axis of the hinge shaft and the long side of the rectangular discharge port is less than half the size of the short side of the rectangular discharge port.

9. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 8, characterized in that, The storage cylinder is made of stainless steel, the weighing cylinder is made of stainless steel, the sealing cap is made of aluminum alloy, and the conveying pipe is made of stainless steel.

10. The automatic weighing and dust diffusion prevention device for tire carbon black according to claim 9, characterized in that, The bottom of the weighing cylinder is closed, and the inner surface of the bottom of the weighing cylinder is flat. The center line of the connection between the horizontal section of the conveying pipe and the side wall of the weighing cylinder is located at the lower third of the height direction of the weighing cylinder.

Images