Tundish covering agent pneumatic conveying device

Abstract

The utility model relates to the technical field of material conveying, in particular to a tundish covering agent pneumatic conveying device which comprises a material tank, a material bin is connected to the top of the material tank, an exhaust pipe and an air supplementing pipe are connected to one side of the top of the material tank, a material supplementing valve is installed at the joint of the material tank and the material bin, and a discharging assembly is connected to one side of the bottom of the material tank. The exhaust pipe is used for exhausting air in the material tank, so that materials in the material bin enter the material tank downwards, the air supplementing pipe is used for supplementing air into the material tank, and the materials in the material tank are output through the discharging assembly through pneumatic conveying. According to the pneumatic conveying device for the tundish covering agent, air in the material tank is exhausted through the exhaust pipe, materials in the material bin rapidly enter the material tank through the air pressure difference, pneumatic conveying is achieved through air supplementing of the air supplementing pipe, and compared with a traditional spiral conveying mode and the like, the problem of conveying interruption caused by material clamping is solved; and the tundish covering agent can be continuously and stably conveyed to a target position.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, and more specifically, to a pneumatic conveying device for intermediate package covering agent. Background Technology

[0002] In the field of material handling technology, especially in the conveying of covering agents in continuous casting tundishes, the demand for efficient, stable, and environmentally friendly conveying devices is becoming increasingly urgent with the development of the steel industry. In the continuous casting production process, the tundish, as a key metallurgical reactor, plays a crucial role in the quality of molten steel through the addition of covering agents, such as improving steel purity, reducing temperature drop, and preventing secondary oxidation.

[0003] In the early days, the addition of tundish covering agent relied heavily on manual operation, such as simply throwing the entire bag of covering agent into the tundish. This method had many drawbacks. Before the advent of the spiral conveyor-type automatic slag feeder mentioned in Chinese patent application CN105057618A, manual feeding was not only labor-intensive and inefficient, but also posed significant safety risks to operators who were close to the high-temperature molten steel. Furthermore, manual feeding was difficult to precisely position, easily leading to uneven distribution of the covering agent. Some covering agent would accumulate in one place, failing to effectively cover the surface of the molten steel, causing secondary oxidation of the steel, affecting its quality, and resulting in material waste.

[0004] For example, the copper and copper alloy casting covering agent feeding device provided by Chinese patent CN204122713U uses a horizontal conveying pipe equipped with a screw shaft to transport protective slag (similar to the function of a covering agent). However, in practical applications, the screw conveyor method is prone to jamming due to the characteristics of the material and the conveying environment, leading to conveying interruptions and requiring frequent shutdowns for cleaning and maintenance, which greatly affects production efficiency. Moreover, when dealing with materials such as tundish covering agents that require large quantities, the conveying capacity and speed of this device are insufficient to meet the demands and cannot adapt to the fast pace of continuous casting production. Utility Model Content

[0005] The purpose of this invention is to provide a pneumatic conveying device for intermediate packaging covering agent, in order to solve the problem that the spiral conveying method mentioned in the background art is prone to material jamming in practical applications due to the characteristics of the material and the conveying environment, which leads to conveying interruption, requires frequent shutdowns for cleaning and maintenance, and greatly affects production efficiency.

[0006] To achieve the above objectives, this utility model provides a pneumatic conveying device for intermediate packaging covering agent, including a material tank. A material hopper is connected to the top of the material tank. An exhaust pipe and an air replenishment pipe are connected to one side of the top of the material tank. A material replenishment valve is installed at the connection between the material tank and the material hopper. A feeding assembly is connected to one side of the bottom of the material tank. The exhaust pipe is used to discharge air from the material tank, allowing material in the material hopper to flow downwards into the material tank. The air replenishment pipe is used to replenish air into the material tank. The material in the material tank is output through the feeding assembly via pneumatic conveying.

[0007] This setup is based on the principle of air pressure difference. The exhaust pipe discharges air from the material tank, reducing the air pressure inside the tank and creating an air pressure difference with the silo. Under atmospheric pressure, the material in the silo flows downward into the material tank. The air supply pipe replenishes air into the material tank, increasing the air pressure inside the tank and creating pneumatic conveying power to output the material from the tank through the feeding assembly.

[0008] Preferably, the top of the material tank is provided with a feed inlet, which is connected to the bottom discharge end of the silo.

[0009] This feature connects the top of the material tank to the bottom of the silo, utilizing gravity and air pressure difference to allow materials in the silo to enter the material tank smoothly and directly, providing material reserves for subsequent pneumatic conveying.

[0010] Preferably, a screen is installed inside the hopper, and a vibration motor is installed on one side of the bottom of the hopper, with the output shaft of the vibration motor driving the screen to vibrate.

[0011] This setting involves the vibration motor generating vibrations during operation, which are transmitted to the screen via the output shaft, causing the screen to vibrate at high frequency. Under the action of vibration, the covering agent moves on the screen, and impurities that cannot pass through the screen aperture are screened out. At the same time, the vibration helps to disperse the covering agent particles, allowing them to pass smoothly through the screen and enter the material tank.

[0012] Preferably, a bag breaker is installed above the middle of the screen, and the bag breaker has a conical frame structure.

[0013] This bag breaker uses a conical frame structure. When the ton bag is hoisted above the silo, the ton bag comes into contact with the conical frame. Under the weight of the ton bag itself and the lifting force of the hoisting hook, the sharp part of the conical frame punctures the ton bag, allowing the covering agent to fall into the silo from the damaged area.

[0014] Preferably, an exhaust valve is installed on the exhaust pipe, and an air replenishment valve is installed on the air replenishment pipe.

[0015] This feature includes an exhaust valve installed on the exhaust pipe, which controls the amount of air discharged from the material tank by opening or closing, thereby regulating the air pressure inside the material tank; and an air replenishment valve installed on the air replenishment pipe, which similarly controls the amount of air replenished by switching on and off, precisely regulating the air pressure inside the material tank to meet the pressure requirements of pneumatic conveying.

[0016] Preferably, the sides of the material tank and silo are connected and fixed by vertical support columns.

[0017] This feature involves vertical support pillars connecting the sides of the material tank and silo. Utilizing the principle of triangular stability (multiple support pillars forming a triangular structure with the material tank and silo), it enhances the overall structural stability of the device, enabling it to withstand forces generated by material weight, air pressure changes, and other factors during material transport.

[0018] Preferably, the bottom of the material tank is provided with a discharge port, and the feeding assembly includes a conveying hose. One end of the conveying hose is connected to the discharge port, and the other end is connected to a gas-solid separator. The top of the gas-solid separator is provided with a gas outlet, and the bottom of the gas-solid separator is connected to a feeding pipe.

[0019] This device features a conveying hose that connects the material tank outlet to the gas-solid separator, serving as a material conveying channel. Its flexibility allows it to adapt to changes in the relative positions of the various components of the device. The gas-solid separator, based on principles such as centrifugal force or gravity settling, discharges the gas from the gas-solid mixture conveyed by the conveying hose through the top gas outlet, while the solid particles (covering agent) are discharged through the bottom discharge pipe.

[0020] Preferably, the feed pipe is inclined and fixed to the bottom outside of the material tank by a bracket.

[0021] The feed pipe is tilted, using gravity to allow the covering agent to slide down the feed pipe under its own weight; the support fixes the feed pipe to ensure its tilt angle is stable, so that the covering agent can be smoothly and continuously delivered to the target position.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] In this pneumatic conveying device for tundish covering agent, air is discharged from the hopper through an exhaust pipe. The pressure difference allows material in the hopper to quickly enter the hopper, and then air is replenished through a replenishment pipe to achieve pneumatic conveying. Compared to traditional screw conveyors, this avoids the problem of conveying interruptions caused by material jamming, and can continuously and stably deliver the tundish covering agent to the target location. Furthermore, the pneumatic conveying method can flexibly adjust the conveying volume and speed according to actual needs, effectively meeting the requirements of large-volume, fast-paced tundish covering agent input in continuous casting production, and significantly improving production efficiency.

[0024] The hopper is equipped with a screen and a vibrating motor. The screen filters the covering agent, removing impurities and preventing foreign objects from clogging the conveying pipes. The vibrating motor drives the screen to vibrate, allowing the covering agent to pass smoothly through the screen, avoiding material accumulation and ensuring smooth material discharge from the hopper. In addition, the conical frame structure of the bag breaker can quickly break open the ton bags, allowing the covering agent to fall smoothly into the hopper, further ensuring the stability of the entire conveying process.

[0025] The device precisely controls the pressure and material conveying process inside the tank through feeding valves, exhaust valves, and air supply valves. It can achieve precise quantitative addition of the covering agent, so that the covering agent is evenly covered on the surface of the molten steel in the tundish, effectively reducing secondary oxidation of the molten steel, improving the purity of the molten steel, reducing temperature drop, and thus improving the quality of the molten steel. Attached Figure Description

[0026] Figure 1 This is a partial structural schematic diagram of the present invention;

[0027] Figure 2 This is a front structural diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the feeding assembly in this utility model;

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Material tank; 11. Inlet; 12. Outlet; 13. Exhaust pipe; 14. Air supply pipe; 2. Material bin; 21. Screen; 22. Bag breaker; 23. Vibrating motor; 3. Feeding valve; 4. Support column; 5. Feeding assembly; 51. Conveying hose; 52. Gas-solid separator; 53. Feeding pipe; 54. Support frame. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] This utility model provides a pneumatic conveying device for intermediate packaging covering agent, such as... Figure 1 , Figure 2 As shown, the device includes a material tank 1, a material hopper 2 connected to the top of the material tank 1, an exhaust pipe 13 and an air supply pipe 14 connected to one side of the top of the material tank 1, a feeding valve 3 installed at the connection between the material tank 1 and the material hopper 2, and a feeding assembly 5 connected to one side of the bottom of the material tank 1. The exhaust pipe 13 is used to discharge the air in the material tank 1, so that the material in the material hopper 2 enters the material tank 1 downwards. The air supply pipe 14 is used to supply air into the material tank 1. The material in the material tank 1 is output through the feeding assembly 5 by pneumatic conveying.

[0033] Based on the principle of air pressure difference, the exhaust pipe 13 discharges air from the material tank 1, reducing the air pressure inside the material tank 1 and creating an air pressure difference with the material hopper 2. Under atmospheric pressure, the material in the material hopper 2 flows downward into the material tank 1. The air supply pipe 14 supplies air to the material tank 1, increasing the air pressure inside the material tank 1 and forming pneumatic conveying power, which outputs the material in the material tank 1 through the feeding assembly 5. This achieves automatic transfer of material from the material hopper 2 to the material tank 1 and pneumatic conveying from the material tank 1 to the feeding assembly 5. Compared with manual feeding, it improves conveying efficiency and reduces manpower input; compared with other non-pneumatic conveying methods, it reduces the risk of material jamming, ensures the continuity and stability of conveying, and meets the needs of continuous casting production for conveying covering agent.

[0034] In this embodiment, as Figure 1 , Figure 2 As shown, the top of the material tank 1 is provided with a feed inlet 11, which is connected to the bottom discharge end of the material bin 2.

[0035] The feed inlet 11 connects the top of the material tank 1 with the bottom discharge end of the material bin 2. Utilizing gravity and air pressure difference, the material in the material bin 2 can smoothly and directly enter the material tank 1, providing material reserves for subsequent pneumatic conveying. This ensures a smooth material conveying path, avoids material accumulation and blockage at the connection point, guarantees efficient transfer of material from the material bin 2 to the material tank 1, and thus ensures the smooth operation of the entire pneumatic conveying process.

[0036] Specifically, such as Figure 1 , Figure 2 As shown, a screen 21 is installed inside the hopper 2, and a vibration motor 23 is installed on one side of the bottom of the hopper 2. The output shaft of the vibration motor 23 drives the screen 21 to vibrate.

[0037] When the vibrating motor 23 operates, it generates vibration, which is transmitted to the screen 21 through the output shaft, causing the screen 21 to vibrate at high frequency. Under the action of vibration, the covering agent moves on the screen 21, and impurities that cannot pass through the aperture of the screen 21 are screened out. At the same time, the vibration helps to disperse the covering agent particles, allowing them to pass smoothly through the screen 21 and enter the material tank 1. The screen 21 removes impurities from the covering agent, preventing impurities from entering the conveying pipeline and causing blockages, thus ensuring the stable operation of the conveying system. The vibrating motor 23 assists in feeding, preventing material from accumulating in the material hopper 2, improving the smoothness and efficiency of feeding from the material hopper 2, and ensuring that the covering agent can be continuously and stably supplied to the material tank 1.

[0038] Furthermore, such as Figure 1 , Figure 2 As shown, a bag breaker 22 is installed above the middle of the screen 21. The bag breaker 22 has a conical frame structure.

[0039] The bag breaker 22 adopts a conical frame structure. When the ton bag is hoisted above the hopper 2, the ton bag contacts the conical frame. Under the weight of the ton bag itself and the lifting force of the hoisting hook, the sharp part of the conical frame punctures the ton bag, allowing the covering agent to fall into the hopper 2 from the damaged area. This achieves automatic bag breaking without manual operation, reducing labor and time costs. The bag breaking process is fast and efficient, avoiding problems such as material spillage and blockage caused by untimely or improper manual bag breaking, ensuring that the material can enter the hopper 2 in a timely and smooth manner, providing a guarantee for subsequent conveying.

[0040] Furthermore, such as Figure 1 , Figure 2 As shown, an exhaust valve is installed on the exhaust pipe 13, and an air replenishment valve is installed on the air replenishment pipe 14.

[0041] An exhaust valve is installed on the exhaust pipe 13, which controls the amount of air discharged from the material tank 1 by opening or closing, thereby regulating the air pressure inside the material tank 1. An air replenishment valve is installed on the air replenishment pipe 14, which similarly controls the amount of air replenished by switching it on and off, precisely regulating the air pressure inside the material tank 1 to meet the pressure requirements of pneumatic conveying. Through precise control of the exhaust valve and the air replenishment valve, the air pressure inside the material tank 1 can be flexibly adjusted according to actual production needs, ensuring smooth material transfer between the material tank 1 and the silo 2 and stable operation of the pneumatic conveying process; avoiding problems such as poor material conveying and pipeline damage caused by excessively high or low air pressure, thus improving the reliability and stability of the device operation.

[0042] Furthermore, such as Figure 1 , Figure 2 As shown, the sides of the material tank 1 and the material bin 2 are connected and fixed by vertical support columns 4.

[0043] Vertical support columns 4 connect the sides of the material tank 1 and the silo 2. Utilizing the principle of triangular stability, multiple support columns 4 form a triangular structure with the material tank 1 and silo 2, enhancing the overall structural stability of the device. This allows it to withstand the forces generated by material weight, air pressure changes, etc., during material conveying. This prevents the material tank 1 and silo 2 from shaking, tilting, or even collapsing during use, ensuring the safety of the device's operation. The stable structure also reduces wear and malfunctions caused by component movement, extending the device's service life and lowering maintenance costs.

[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the bottom of the material tank 1 is provided with a discharge port 12, and the feeding assembly 5 includes a conveying hose 51. One end of the conveying hose 51 is connected to the discharge port 12, and the other end is connected to a gas-solid separator 52. The top of the gas-solid separator 52 is provided with a gas outlet, and the bottom of the gas-solid separator 52 is connected to a feeding pipe 53.

[0045] The conveying hose 51 connects the outlet 12 of the material tank 1 to the gas-solid separator 52, serving as a material conveying channel. Its flexibility adapts to changes in the relative positions of the various components of the device. Based on principles such as centrifugal force or gravity settling, the gas-solid separator 52 discharges the gas from the gas-solid mixture conveyed by the conveying hose 51 through the top gas outlet, while the solid particulate covering agent is discharged through the bottom discharge pipe 53. The flexibility of the conveying hose 51 ensures the flexibility of material conveying, facilitating the installation and layout of the device. The gas-solid separator 52 effectively separates the gas and the covering agent, reducing dust generation during conveying and lowering pollution to the production environment. Simultaneously, it allows the covering agent to enter the discharge pipe 53 more purely, improving the conveying quality.

[0046] Furthermore, such as Figure 3 As shown, the feed pipe 53 is inclined and is fixed to the bottom outside of the material tank 1 by the bracket 54.

[0047] The feed pipe 53 is inclined, utilizing gravity to allow the covering agent to slide down along it. The support 54 fixes the feed pipe 53, ensuring a stable inclination angle and enabling the covering agent to be smoothly and continuously delivered to the target location. The inclined feed pipe 53 avoids material residue and blockage inside the pipe, ensuring smooth delivery of the covering agent. The stable support 54 ensures that the position of the feed pipe 53 remains unchanged, maintaining the stability and reliability of the delivery process and improving the overall efficiency of the device.

[0048] In use, the pneumatic conveying device for intermediate bag covering agent of this utility model first hoists the ton bag containing the covering agent to the top of the silo 2. When the ton bag comes into contact with the bag breaker 22, under the action of the ton bag's own weight and the lifting force of the hook, the sharp part of the bag breaker 22 punctures the ton bag, and the covering agent falls into the silo 2. At this time, the vibrating motor 23 starts, and its output shaft drives the screen 21 to vibrate at high frequency. The covering agent moves on the screen 21, and impurities cannot be screened out because they cannot pass through the aperture of the screen 21. The qualified covering agent passes through the screen 21 and enters the lower part of the silo 2 for storage, preparing for subsequent conveying.

[0049] When it is necessary to transfer materials from silo 2 to tank 1, the exhaust valve on the exhaust pipe 13 is opened to release the air from tank 1, thereby reducing the air pressure in tank 1 and creating a pressure difference with silo 2. Under atmospheric pressure, the covering agent in silo 2 smoothly and directly enters tank 1 through the inlet 11, completing the automatic transfer process of materials from silo 2 to tank 1.

[0050] Once the material in tank 1 is fully stored, close the exhaust valve and open the air supply valve on the air supply pipe 14 to supply air into tank 1, increasing the air pressure inside tank 1 and generating the power required for pneumatic conveying. At this point, the air pressure inside tank 1 reaches a suitable value, providing pressure assurance for the conveying of the covering agent.

[0051] Once the air pressure reaches the set value, the covering agent, under the action of air force, enters the conveying hose 51 from the discharge port 12 at the bottom of the tank 1. The conveying hose 51, utilizing its flexibility, adapts to changes in the relative positions of the various components of the device, conveying the covering agent to the gas-solid separator 52. Inside the gas-solid separator 52, based on the principles of centrifugal force or gravity sedimentation, the gas in the gas-solid mixture is discharged from the top gas outlet, while the solid particles (covering agent) are discharged from the bottom discharge pipe 53.

[0052] The feed pipe 53 is inclined, and the covering agent slides down the feed pipe 53 under its own gravity. The feed pipe 53, which is fixed by the bracket 54, maintains a stable inclination angle, ensuring that the covering agent can be smoothly and continuously transported to the target position such as the intermediate bag, thus completing the entire pneumatic conveying process of the covering agent.

[0053] Throughout the entire operation, the transfer of materials between the material tank 1 and the silo 2, as well as the pneumatic conveying process, can be flexibly adjusted through precise control of the feeding valve 3, the exhaust valve, and the air supply valve. The material tank 1 and the silo 2 are connected and fixed by vertical support columns 4 to ensure the stability of the overall structure of the device, enabling it to withstand the forces generated by material weight, air pressure changes, etc., and ensuring the safe, reliable, and stable operation of the device.

[0054] Finally, it should be noted that the electronic components in the above-mentioned components, such as the vibration motor 23 in this embodiment, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic conveying device for intermediate packaging covering agent, comprising a material tank (1), characterized in that: The top of the material tank (1) is connected to the hopper (2). The top side of the material tank (1) is connected to the exhaust pipe (13) and the air supply pipe (14). The connection between the material tank (1) and the hopper (2) is equipped with a feeding valve (3). The bottom side of the material tank (1) is connected to the feeding assembly (5). The exhaust pipe (13) is used to discharge the air in the material tank (1), so that the material in the hopper (2) enters the material tank (1) downward. The air supply pipe (14) is used to supply air into the material tank (1). The material in the material tank (1) is output through the feeding assembly (5) by pneumatic conveying.

2. The pneumatic conveying device for intermediate package covering agent according to claim 1, characterized in that: The top of the material tank (1) is provided with a feed inlet (11), which is connected to the bottom discharge end of the silo (2).

3. The pneumatic conveying device for intermediate package covering agent according to claim 1, characterized in that: The silo (2) is equipped with a screen (21) inside, and a vibration motor (23) is installed on one side of the bottom of the silo (2). The output shaft of the vibration motor (23) drives the screen (21) to vibrate.

4. The pneumatic conveying device for intermediate package covering agent according to claim 3, characterized in that: A bag-breaking device (22) is installed above the middle part of the screen (21), and the bag-breaking device (22) has a conical frame structure.

5. The pneumatic conveying device for intermediate package covering agent according to claim 1, characterized in that: An exhaust valve is installed on the exhaust pipe (13), and an air supply valve is installed on the air supply pipe (14).

6. The pneumatic conveying device for intermediate package covering agent according to claim 1, characterized in that: The sides of the material tank (1) and the silo (2) are connected and fixed by vertical support columns (4).

7. The pneumatic conveying device for intermediate package covering agent according to claim 1, characterized in that: The bottom of the material tank (1) is provided with a discharge port (12), and the feeding assembly (5) includes a conveying hose (51). One end of the conveying hose (51) is connected to the discharge port (12), and the other end is connected to a gas-solid separator (52). The top of the gas-solid separator (52) is provided with a gas outlet, and the bottom of the gas-solid separator (52) is connected to a feeding pipe (53).

8. The pneumatic conveying device for intermediate liner covering agent according to claim 7, characterized in that: The feed pipe (53) is inclined and is fixed to the bottom outside of the material tank (1) by a bracket (54).

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