Feeding protection device

Abstract

The utility model provides a charging protection device which comprises a stirring device, a charging device, a protection device and a platform, the platform is arranged above a steel ladle, and a stirring head of the stirring device penetrates through the platform and extends into the steel ladle; the protective device comprises a protective cover, the protective cover is arranged above the platform, and the protective cover is arranged around a stirring shaft of the stirring device; the feeding device comprises a hopper, an articulated chute and a discharging port, the hopper is arranged on the platform through a support, a bottom outlet of the hopper is connected with the discharging port through the articulated chute, and the discharging port extends to the position above the steel ladle through an open hole of the platform. According to the feeding protection device, frequent lifting operation of the stirring device can be reduced, the pneumatic protection clamping plate is kept normally open, long-term high-temperature baking of high-temperature molten iron on a bearing of the stirring device is avoided, and continuity and stability of the production process are improved.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking technology, specifically to a feeding protection device. Background Technology

[0002] In the steelmaking process, desulfurization of molten iron mainly involves adding a desulfurizing agent to remove sulfur from the molten iron, which is a crucial step in improving the quality of the molten iron. The stirring device is an important piece of equipment for achieving efficient desulfurization; it promotes thorough mixing of the desulfurizing agent and the molten iron through mechanical stirring, thereby effectively removing sulfur from the molten iron.

[0003] Traditional agitation devices are designed for the addition of only a single desulfurizing agent (such as quicklime), and pneumatic protective clamps are used to protect the device during the agitation process. However, to improve desulfurization efficiency and meet the production requirements of specific steel grades, multiple desulfurizing agents, such as aluminum granules and fluorite, are often added in actual production. This necessitates frequent raising and lowering of the agitation device and operation of the pneumatic clamps during the feeding process. This not only increases the labor intensity of operators but also subjectes the agitation device to prolonged exposure to high temperatures, causing the main shaft bearing, which is closest to the molten iron, to a high-temperature environment, leading to lubricant evaporation. Inadequate bearing lubrication can result in equipment failures such as bearing seizure, affecting the continuity and stability of production, and increasing maintenance costs and production risks.

[0004] Therefore, providing a feeding device that can solve the problems of frequent lifting and lowering of the stirring device and frequent opening and closing of the protective clamp during the material addition process, and avoid long-term high-temperature baking of the bearings of the stirring device, is a technical problem that needs to be solved in this field. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a feeding protection device that can reduce the frequent lifting and lowering operation of the stirring device, keep the pneumatic protective clamp open, and avoid long-term high-temperature baking of the bearings of the stirring device by high-temperature molten iron, thereby improving the continuity and stability of the production process.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a feeding protection device, which includes a stirring device, a feeding device, a protection device, and a platform. The platform is disposed above the ladle, and the stirring head of the stirring device passes through the platform and extends into the ladle.

[0008] The protective device includes a protective cover, which is disposed above the platform and surrounds the stirring shaft of the stirring device.

[0009] The feeding device includes a hopper, a chute, and a discharge port. The hopper is mounted on a platform via a support, and the bottom outlet of the hopper is connected to the discharge port via the chute. The discharge port extends above the ladle through an opening in the platform.

[0010] In this invention, on the one hand, by setting up a hopper, chute, and discharge port, the lifting and stirring device and the operation of the pneumatic protective clamp are avoided for feeding, enabling online feeding during the stirring process, thereby improving desulfurization efficiency; on the other hand, by setting up a protective cover, the high-temperature flue gas can be effectively isolated from the main shaft bearing of the stirring device, reducing the high-temperature baking of the stirring device, thereby avoiding the occurrence of bearing seizure accidents.

[0011] In this utility model, the feeding protection device is usually equipped with a pneumatic protective clamp on the platform. The pneumatic protective clamp is generally set on one side or around the stirring shaft. By using the feeding protection device provided by this utility model, the pneumatic protective clamp can be kept in a normally open state.

[0012] Preferably, a sector valve is provided at the bottom outlet of the hopper.

[0013] In this invention, by preferably installing a sector valve at the bottom outlet of the hopper, the amount and speed of material feeding can be controlled by controlling the opening and closing degree of the sector valve, avoiding the feeding of a large amount of material at one time, thereby improving the uniformity and stability of the mixing process.

[0014] Preferably, the stirring device includes a stirring device frame, a motor, a stirring shaft, a main shaft bearing, and a stirring head; the motor is mounted on the stirring device frame, the power output end of the motor is connected to the stirring shaft, the stirring shaft passes through the platform and its bottom is connected to the stirring head, the stirring head extends into the ladle from the top opening of the ladle, and the main shaft bearing is mounted above the platform and sleeved on the outside of the stirring shaft.

[0015] Preferably, the protective cover is disposed between the main shaft bearing and the platform, and is sleeved on the outside of the stirring shaft.

[0016] In this invention, by preferably setting a protective cover between the main shaft bearing and the platform and sleeved on the outside of the stirring shaft, the high-temperature flue gas can be effectively isolated from the main shaft bearing of the stirring device, reducing the failure of lubricating oil and bearing seizure caused by high temperature. Even if the pneumatic protective clamp is kept in the open state, the main shaft bearing can still maintain a good lubrication state in the high-temperature environment.

[0017] Preferably, the protective cover is connected to the frame of the stirring device via a chain.

[0018] Preferably, the number of chains includes at least two, for example, two, three or four, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0019] Preferably, the chains are symmetrically arranged around the circumference of the protective cover.

[0020] In this invention, the protective cover is preferably fixed by a chain. The length of the chain can be selected as needed to control the height of the protective cover. The insertion depth of the stirring head during deep desulfurization is taken as the standard. That is, at the maximum insertion depth, the protective cover can still effectively isolate the high-temperature flue gas from contacting the stirring device, which significantly improves the operational stability of the stirring device in high-temperature environments.

[0021] Preferably, a baffle plate is provided inside the chute.

[0022] In this invention, by preferably setting a baffle plate, the flow rate and speed of the material can be further controlled. The material can be quickly cut off by the baffle plate, avoiding a large amount of material flowing in at once, thereby improving the accuracy of the batching.

[0023] Preferably, the chute is inclined relative to the platform.

[0024] Preferably, the tilt angle of the chute relative to the platform is 30-45°, for example, it can be 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44° or 45°, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0025] In this invention, by optimizing the tilt angle of the chute relative to the platform, the gravitational potential energy of the material itself can be effectively utilized, allowing the material to flow smoothly within the chute and reducing material accumulation or blockage caused by an excessively small angle.

[0026] The feeding protection device provided by this utility model is used in the following iron desulfurization operation process:

[0027] (1) Use an overhead crane to hoist the material into the hopper above the platform, open the sector valve, and the material is conveyed downward through the chute. Control the amount and speed of material feeding by controlling the opening of the sector valve, adjust the insert plate in the chute to the appropriate position, and further adjust the feeding speed. The material enters the discharge port from the chute and falls into the ladle through the discharge port.

[0028] (2) The protective cover is connected to the frame of the mixing device by a chain. The position of the protective cover can be adjusted by changing the length of the chain to ensure that the protective cover can effectively isolate the high temperature flue gas from the main shaft bearing of the mixing device at the maximum insertion depth, thus ensuring the stable operation of the mixing device. During the mixing process, the feeding method in (1) can be used simultaneously.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The feeding protection device provided by this utility model can reduce the frequent lifting and lowering operation of the stirring device, keep the pneumatic protective clamp open, and avoid the long-term high temperature baking of the bearing of the stirring device by the high temperature molten iron, thereby improving the continuity and stability of the production process.

[0031] (2) The feeding protection device provided by this utility model can control the flow rate and speed of materials through the preferred arrangement of the fan valve and the slide plate, thereby avoiding a large amount of materials to rush in at one time and improving the accuracy of the batching.

[0032] (3) The feeding protection device provided by this utility model uses a chain to fix the protective cover. The length of the chain can be selected as needed to control the height of the protective cover. Even at the maximum insertion depth, the protective cover can still effectively isolate the high-temperature flue gas from the main shaft bearing of the stirring device, which significantly improves the operational stability of the stirring device in a high-temperature environment. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the feeding protection device provided in Embodiment 1 of this utility model;

[0034] In the diagram: 1-Platform; 2-Steel ladle; 3-Agitator frame; 4-Motor; 5-Agitator shaft; 6-Main shaft bearing; 7-Agitator head; 8-Protective cover; 9-Chain; 10-Hopper; 11-Chutter; 12-Discharge port; 13-Sector valve; 14-Pneumatic protective clamp. Detailed Implementation

[0035] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] This embodiment provides a feeding protection device, such as... Figure 1 As shown, the feeding protection device includes a stirring device, a feeding device, a protection device and a platform 1. The platform 1 is located above the ladle 2 and is equipped with a pneumatic protective clamp 14.

[0040] The stirring device includes a stirring device frame 3, a motor 4, a stirring shaft 5, a main shaft bearing 6, and a stirring head 7. The motor 4 is mounted on the stirring device frame 3, and the power output end of the motor 4 is connected to the stirring shaft 5. The stirring shaft 5 passes through the platform 1 and its bottom is connected to the stirring head 7. The stirring head 7 extends into the ladle 2 from the top opening of the ladle 2. The main shaft bearing 6 is located above the platform 1 and is sleeved on the outside of the stirring shaft 5.

[0041] The protective device includes a protective cover 8, which is disposed between the main shaft bearing 6 and the platform 1 and sleeved on the outside of the stirring shaft 5. The protective cover 8 is connected to the stirring device frame 3 by chains 9, and there are 4 chains 9 symmetrically arranged around the protective cover 8.

[0042] The feeding device includes a hopper 10, a chute 11, and a discharge port 12. The hopper 10 is mounted on the platform 1 via a bracket. A sector valve 13 is installed at the bottom outlet of the hopper 10. The sector valve 13 at the bottom outlet is connected to the discharge port 12 via the chute 11. The discharge port 12 extends above the ladle 2 through an opening in the platform 1. An insert plate (not shown in the figure) is installed inside the chute 11. The chute 11 is inclined relative to the platform 1 at an angle of 35°.

[0043] Example 2

[0044] This embodiment provides a feeding protection device, which includes a stirring device, a feeding device, a protection device, and a platform, wherein the platform is disposed above the ladle;

[0045] The stirring device includes a stirring device frame, a motor, a stirring shaft, a main shaft bearing, and a stirring head. The motor is mounted on the stirring device frame, and the power output end of the motor is connected to the stirring shaft. The stirring shaft passes through the platform and its bottom is connected to the stirring head. The stirring head extends into the ladle from the top opening of the ladle. The main shaft bearing is located above the platform and is sleeved on the outside of the stirring shaft.

[0046] The protective device includes a protective cover, which is disposed between the main shaft bearing and the platform and sleeved on the outside of the stirring shaft. The protective cover is connected to the stirring device frame by chains, and there are four chains symmetrically arranged around the circumference of the protective cover.

[0047] The feeding device includes a hopper, a chute, and a discharge port. The hopper is mounted on the platform via a bracket. A sector valve is installed at the bottom outlet of the hopper. The sector valve at the bottom outlet is connected to the discharge port via the chute. The discharge port extends above the ladle through an opening in the platform. An insert plate is installed inside the chute. The chute is inclined relative to the platform at an angle of 40°.

[0048] Example 3

[0049] This embodiment provides a feeding protection device, which includes a stirring device, a feeding device, a protection device, and a platform, wherein the platform is disposed above the ladle;

[0050] The stirring device includes a stirring device frame, a motor, a stirring shaft, a main shaft bearing, and a stirring head. The motor is mounted on the stirring device frame, and the power output end of the motor is connected to the stirring shaft. The stirring shaft passes through the platform and its bottom is connected to the stirring head. The stirring head extends into the ladle from the top opening of the ladle. The main shaft bearing is located above the platform and is sleeved on the outside of the stirring shaft.

[0051] The protective device includes a protective cover, which is disposed between the main shaft bearing and the platform and sleeved on the outside of the stirring shaft. The protective cover is connected to the stirring device frame by chains, and there are four chains symmetrically arranged around the circumference of the protective cover.

[0052] The feeding device includes a hopper, a chute, and a discharge port. The hopper is mounted on the platform via a bracket. A sector valve is installed at the bottom outlet of the hopper. The sector valve at the bottom outlet is connected to the discharge port via the chute. The discharge port extends above the ladle through an opening in the platform. An insert plate is installed inside the chute. The chute is inclined relative to the platform at an angle of 45°.

[0053] The operation process of the feeding protection device provided in Examples 1-3 for desulfurization of molten iron is as follows:

[0054] (1) Use an overhead crane to hoist the material into the hopper above the platform, open the sector valve, and the material is conveyed downward through the chute. Control the amount and speed of material feeding by controlling the opening of the sector valve, adjust the insert plate in the chute to the appropriate position, and further adjust the feeding speed. The material enters the discharge port from the chute and falls into the ladle through the discharge port.

[0055] (2) The protective cover is connected to the frame of the mixing device by a chain. The position of the protective cover can be adjusted by changing the length of the chain to ensure that the protective cover can effectively isolate the high temperature flue gas from the main shaft bearing of the mixing device at the maximum insertion depth, thus ensuring the stable operation of the mixing device. During the mixing process, the feeding method in (1) can be used simultaneously.

[0056] Example 4

[0057] This embodiment provides a feeding protection device, which differs from Embodiment 1 only in that it does not have an insert plate.

[0058] Example 5

[0059] This embodiment provides a feeding protection device, which differs from Embodiment 1 only in that it does not include a sector valve.

[0060] Compared to Example 1, Examples 4-5 cannot effectively control the flow rate and speed of materials, which may lead to a large influx of materials at once, affecting the stability of the stirring process. Therefore, this utility model, by preferably setting a fan-shaped valve and a baffle plate, can further regulate the amount and speed of material feeding, thereby ensuring the stability of the desulfurization process and improving the desulfurization efficiency.

[0061] Example 6

[0062] This embodiment provides a feeding protection device, which differs from Embodiment 1 only in that the tilt angle of the chute relative to the platform is 10°.

[0063] Example 7

[0064] This embodiment provides a feeding protection device, which differs from Embodiment 1 only in that the tilt angle of the chute relative to the platform is 50°.

[0065] Compared to Example 1, in Examples 6-7, a tilt angle that is too low may cause material to accumulate or become blocked, while a tilt angle that is too high may cause the material to fall too quickly, affecting the stability of the mixing process. Therefore, this utility model can further control the falling process of the material by optimizing the tilt angle of the chute relative to the platform, thereby ensuring stable operation.

[0066] In summary, the feeding protection device provided by this utility model can reduce the frequent lifting and lowering operations of the stirring device, keep the pneumatic protective clamp open, and avoid long-term high-temperature baking of the bearings of the stirring device by high-temperature molten iron, thereby improving the continuity and stability of the production process.

[0067] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A feeding protection device, characterized in that, The feeding protection device includes a stirring device, a feeding device, a protection device, and a platform. The platform is positioned above the ladle, and the stirring head of the stirring device passes through the platform and extends into the ladle. The protective device includes a protective cover, which is disposed above the platform and surrounds the stirring shaft of the stirring device. The feeding device includes a hopper, a chute, and a discharge port. The hopper is mounted on a platform via a support, and the bottom outlet of the hopper is connected to the discharge port via the chute. The discharge port extends above the ladle through an opening in the platform.

2. The feeding protection device according to claim 1, characterized in that, A sector valve is installed at the bottom outlet of the hopper.

3. The feeding protection device according to claim 1, characterized in that, The stirring device includes a stirring device frame, a motor, a stirring shaft, a main shaft bearing, and a stirring head; The motor is mounted on the frame of the mixing device. The power output end of the motor is connected to the mixing shaft. The mixing shaft passes through the platform and is connected to the mixing head at its bottom. The mixing head extends into the ladle from the top opening of the ladle. The main shaft bearing is located above the platform and is sleeved on the outside of the mixing shaft.

4. The feeding protection device according to claim 3, characterized in that, The protective cover is located between the main shaft bearing and the platform, and is fitted onto the outside of the stirring shaft.

5. The feeding protection device according to claim 4, characterized in that, The protective cover is connected to the frame of the mixing device via a chain.

6. The feeding protection device according to claim 5, characterized in that, The number of chains includes at least two.

7. The feeding protection device according to claim 6, characterized in that, The chains are symmetrically arranged around the circumference of the protective cover.

8. The feeding protection device according to claim 1, characterized in that, A baffle plate is installed inside the chute.

9. The feeding protection device according to claim 1, characterized in that, The chute is inclined relative to the platform.

10. The feeding protection device according to claim 9, characterized in that, The chute is tilted at an angle of 30-45° relative to the platform.

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