Negative pressure blast furnace tuyere plugging device
By using the negative pressure components of the negative pressure blast furnace tuyere blocking device to adsorb the gun barrel mud, the problem of poor adaptability of traditional devices is solved, and stable and reliable tuyere blocking operation is achieved. It is applicable to gun barrel mud of different shapes and sizes, and reduces the complexity of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN IRON & STEEL GRP
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional air-blocking devices are difficult to fit tightly against the surface of the gun clay, resulting in poor adaptability and affecting the reliability and effectiveness of air-blocking.
The negative pressure blast furnace tuyere blocking device uses the suction cup of the negative pressure component to adsorb the taphole clay. The piston is driven by the push-pull rod to reciprocate in the connecting rod to form negative pressure, so as to achieve stable filling of the taphole clay with the blast furnace tuyere. The device can adapt to taphole clay of different shapes and sizes.
It improves the stability and reliability of tuyeres blocking operation, reduces the labor intensity of operators, adapts to different blast furnace operating conditions, and has wide applicability.
Smart Images
Figure CN224243118U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of blast furnace production technology, and in particular relates to a negative pressure blast furnace tuyeres blocking device. Background Technology
[0002] In blast furnace ironmaking, the tuyere is a crucial component, and its normal operation has a vital impact on the blast furnace's production efficiency and quality. Tuyere blocking is typically required in the following situations: 1. Abnormal blast furnace conditions: When the blast furnace experiences severe abnormalities such as hanging or collapse, and conventional adjustment methods are ineffective, blocking the tuyere can reduce the air supply area and improve airflow distribution. If the hearth is operating unevenly with some areas experiencing slag buildup, blocking the corresponding tuyere can promote slag-iron flow and mixing, improving the hearth condition; 2. Equipment failure or maintenance needs: Damaged tuyeres, such as those burned or leaking, require blocking for repair or replacement to prevent safety accidents and production disruptions. During blast furnace shutdowns for maintenance, blocking the tuyere can prevent gas backflow and facilitate related equipment maintenance; 3. Adjusting blast furnace smelting parameters: When reducing smelting intensity, blocking the tuyere can reduce the air supply area, increasing wind speed and blast energy while maintaining fan capacity, thus maintaining hearth activity.
[0003] Traditional tuyere plugging operations typically rely on manual labor to press the taphole clay into the tuyere using a plugging rod, which has significant drawbacks: It often employs a simple mechanical insertion method, making it difficult for traditional tuyere plugging devices to precisely and tightly adhere to the taphole clay surface during operation. The stability of the taphole clay filling process is poor, affecting the reliability of the tuyere plugging; furthermore, it has poor adaptability to different shapes and states of taphole clay, making it difficult to achieve a tight fit with the surface and impacting the tuyere plugging effect. Summary of the Invention
[0004] To address the problems existing in the prior art, this utility model provides a negative pressure blast furnace tuyere blocking device, which can effectively adsorb gun clay, making the gun clay filling process of the blast furnace tuyere more stable and reliable, ensuring a tight fit between the gun clay and the blast furnace tuyere during the tuyere blocking operation, and is applicable to precast gun clay of different shapes and sizes, adapting to different blast furnace operating conditions and tuyere blocking requirements, thus having wide applicability.
[0005] This utility model is implemented as follows: a negative pressure blast furnace tuyeres blocking device includes a rod assembly and a negative pressure assembly disposed at the end of the rod assembly;
[0006] The rod assembly includes a connecting rod, which is a hollow rod. A piston is installed inside the connecting rod, and a push-pull rod is installed on the piston located on the opposite side of the negative pressure assembly. The push-pull rod can drive the piston to reciprocate axially inside the connecting rod.
[0007] The negative pressure component includes a suction cup. In the working state, the suction cup's adsorption cavity is attached to the surface of the drilling mud. The suction cup is provided with a hollow bolt that communicates with the suction cup's adsorption cavity. The suction cup is placed at the end of the connecting rod, and the hollow bolt is inserted into the connecting rod.
[0008] Furthermore, a handle is provided on the push-pull rod away from the piston side, and an axial through-hole is provided on the connecting rod. The end of the handle extends to the outside of the connecting rod through the through-hole. This allows the operator to easily grip the handle and perform push-pull operations. Through the push-pull action of the handle, the operator can precisely control the axial reciprocating movement of the piston within the connecting rod, thereby easily creating or eliminating negative pressure. This direct mechanical connection method improves the response speed and accuracy of operation.
[0009] Furthermore, a connecting disc is fitted onto the hollow bolt at the connection position with the suction cup, and a first fastener for fixing the connecting disc and the suction cup is fitted onto the hollow bolt;
[0010] The first fastener is fitted with a connecting bolt, and a second fastener for fixing the connecting bolt and the connecting disc is fitted on the hollow bolt located at the upper end of the connecting bolt.
[0011] The end of the connecting rod is provided with an internal thread, and the suction cup is connected to the internal thread of the connecting rod through the external thread on the connecting bolt, and the connecting disc abuts against the mounting end face of the connecting rod.
[0012] The suction cup is securely fixed to the connecting disc by the cooperation of the two fasteners, preventing it from loosening or falling off during the blocking of air vents and ensuring a stable adsorption connection between the device and the clay. The connecting disc abuts against the mounting end face of the connecting rod, increasing the contact area and helping to improve the sealing performance at the connection, preventing negative pressure leakage and thus enhancing the negative pressure adsorption effect. The threaded connection design of the connecting bolt and the connecting rod makes the installation and removal of the suction cup simple and quick. When the suction cup needs to be replaced or maintained, simply loosen the connecting bolt; no complicated tools or operating procedures are required.
[0013] Furthermore, a handle slot is provided on the connecting rod located at the through-hole position, and the handle can be placed in the handle slot to achieve continuous adsorption of the drilling mud.
[0014] Furthermore, a sealing ring is provided between the connecting bolt and the connecting disc. This sealing ring effectively prevents negative pressure leakage and enhances the overall sealing performance of the device. This ensures that the negative pressure is maintained stably during the air vent blocking process, thereby improving the device's adsorption effect on the drilling mud.
[0015] Furthermore, both the first fastener and the second fastener are fastening nuts.
[0016] Furthermore, the connecting rod is a spliced structure, comprising a first rod and a second rod connected by threads. This spliced structure allows for more flexible installation of the connecting rod. Operators can quickly adjust the length of the connecting rod according to actual needs, meeting the requirements of different blast furnace tuyeres positions and depths. If a part of the connecting rod is worn or damaged, only the damaged rod needs to be replaced, without replacing the entire connecting rod. This reduces maintenance costs, as well as repair time and downtime.
[0017] The advantages and technical effects of this utility model are as follows: By employing the above-mentioned technical solution, the suction cup of the negative pressure component adheres to the surface of the taphole clay, and the piston reciprocates within the connecting rod using a push-pull rod to create negative pressure. This effectively adsorbs the taphole clay, making the taphole clay filling process in the blast furnace tuyere more stable and reliable, ensuring a tight fit between the taphole clay and the blast furnace tuyere during the tuyere blocking operation. The negative pressure can be formed and eliminated simply by operating the piston with the push-pull rod, completing the adsorption and removal of the taphole clay. The operation is simple and convenient, requiring no complex procedures and reducing the labor intensity of operators. Furthermore, it is applicable to precast taphole clay of different shapes and sizes, adapting to different blast furnace operating conditions and tuyere blocking requirements, and has wide applicability. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;
[0019] Figure 2 This is a schematic diagram of the rod assembly structure provided in an embodiment of the present utility model;
[0020] Figure 3 This is a schematic diagram of the connecting rod structure provided in an embodiment of the present utility model;
[0021] Figure 4 This is a schematic diagram of the negative pressure component structure provided in this embodiment of the utility model.
[0022] In the diagram: 1. Rod assembly; 1-1. Connecting rod; 1-2. Piston; 1-3. Push-pull rod; 1-4. Handle; 1-5. Through-hole; 1-6. First rod; 1-7. Second rod; 2. Negative pressure assembly; 2-1. Suction cup; 2-2. Hollow bolt; 2-3. Connecting disc; 2-4. First fastener; 2-5. Connecting bolt; 2-6. Second fastener. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0024] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., 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.
[0025] like Figures 1 to 4 As shown, this application provides a negative pressure blast furnace tuyeres plugging device, including a rod assembly 1 and a negative pressure assembly 2 disposed at the end of the rod assembly 1; the rod assembly 1 includes a connecting rod 1-1, which is a hollow rod body, and a piston 1-2 is disposed inside the connecting rod 1-1. The piston 1-2 is tightly fitted with the connecting rod 1-1 to ensure sealing and generate negative pressure. A push-pull rod 1-3 is disposed on the piston 1-2 located on the opposite side of the negative pressure assembly 2. The push-pull rod 1-3 can drive the piston 1-2 to reciprocate axially within the connecting rod 1-1; the negative pressure assembly 2 includes a suction cup 2-1. In the working state, the suction cavity of the suction cup 2-1 is attached to the surface of the taphole clay. A hollow bolt 2-2 communicating with the suction cavity of the suction cup 2-1 is disposed on the suction cup 2-1. The suction cup 2-1 is placed at the end of the connecting rod 1-1, and the hollow bolt 2-2 is inserted into the connecting rod 1-1.
[0026] Furthermore, a handle 1-4 is provided on the push-pull rod 1-3 away from the piston 1-2, and an axial through-hole 1-5 is provided on the connecting rod 1-1. The end of the handle 1-4 extends to the outside of the connecting rod 1-1 through the through-hole 1-5. This allows the operator to easily grip the handle 1-4 and perform push-pull operations. Through the push-pull action of the handle 1-4, the operator can accurately control the axial reciprocating movement of the piston 1-2 within the connecting rod 1-1, thereby conveniently creating or eliminating negative pressure. This direct mechanical connection improves the response speed and accuracy of operation. Preferably, a handle 1-4 slot is provided on the connecting rod 1-1 located at the through-hole 1-5, allowing the handle 1-4 to be placed in the handle 1-4 slot for continuous adsorption of stemming material.
[0027] Furthermore, a connecting disc 2-3 is fitted onto the hollow bolt 2-2 at the connection position with the suction cup 2-1. A first fastener 2-4 for fixing the connecting disc 2-3 and the suction cup 2-1 is fitted onto the hollow bolt 2-2. A connecting bolt 2-5 is fitted over the first fastener 2-4. Specifically, the connecting bolt 2-5 is a hollow structure. A second fastener 2-6 for fixing the connecting bolt 2-5 and the connecting disc 2-3 is fitted onto the hollow bolt 2-2 located at the upper end of the connecting bolt 2-5. The end of the connecting rod 1-1 is provided with an internal thread. The suction cup 2-1 is connected to the internal thread of the connecting rod 1-1 through the external thread on the connecting bolt 2-5, and the connecting disc 2-3 abuts against the mounting end face of the connecting rod 1-1. Preferably, both the first fastener 2-4 and the second fastener 2-6 are fastening nuts.
[0028] By using the connecting disc 2-3 and two fasteners, the suction cup 2-1 can be firmly fixed to the connecting disc 2-3, preventing the suction cup 2-1 from loosening or falling off during the air vent blocking process, and ensuring a stable adsorption connection between the device and the clay. The connecting disc 2-3 abuts against the mounting end face of the connecting rod 1-1, increasing the contact area and helping to improve the sealing performance at the connection, preventing negative pressure leakage, and thus enhancing the negative pressure adsorption effect. The threaded connection design of the connecting bolt 2-5 and the connecting rod 1-1 makes the installation and removal of the suction cup 2-1 simple and quick. When it is necessary to replace or maintain the suction cup 2-1, simply loosen the connecting bolt 2-5, without the need for complicated tools or operating procedures.
[0029] Furthermore, a sealing ring is provided between the connecting bolt 2-5 and the connecting disc 2-3. This sealing ring effectively prevents negative pressure leakage and enhances the overall sealing performance of the device. This ensures that the negative pressure is maintained stably during the air vent blocking process, thereby improving the device's adsorption effect on the drilling mud.
[0030] Preferably, the connecting rod 1-1 has a spliced structure, including a first rod 1-6 and a second rod 1-7 connected by threads. This spliced structure allows for more flexible installation of the connecting rod 1-1. Operators can quickly adjust the length of the connecting rod 1-1 according to actual needs, meeting the requirements of different blast furnace tuyeres positions and depths. If a part of the connecting rod 1-1 is worn or damaged, only the damaged rod needs to be replaced, without replacing the entire connecting rod 1-1. This reduces maintenance costs, as well as repair and downtime.
[0031] In use, the negative pressure plate is pressed onto the surface of the pre-made gun clay. By pulling the push rod 1-3, the piston 1-2 moves within the connecting rod 1-1. The air in the suction chamber of the suction cup 2-1 is drawn out through the hollow bolt 2-2, creating negative pressure, which causes the suction cup 2-1 to adsorb the gun clay. The handle 1-4 is placed in the pre-made slot of the connecting pipe to achieve continuous adsorption of the gun clay. After the gun clay is sent into the air vent, the handle 1-4 is removed from the slot, and the piston 1-2 is pushed to release the negative pressure. The rod assembly 1 is then removed, completing the air vent blocking operation.
[0032] By employing the aforementioned technical solution, the suction cup 2-1 of the negative pressure component 2 adheres to the surface of the taphole clay. The push-pull rod 1-3 drives the piston 1-2 to reciprocate within the connecting rod 1-1, creating negative pressure. This effectively adsorbs the taphole clay, making the taphole clay filling process in the blast furnace tuyeres more stable and reliable, ensuring a tight seal between the taphole clay and the blast furnace tuyeres during the tuyeres plugging operation. The negative pressure is formed and eliminated simply by operating the piston 1-2 via the push-pull rod 1-3, completing the adsorption and removal of the taphole clay. The operation is simple and convenient, eliminating the need for complex procedures and reducing the labor intensity of operators. Furthermore, it is applicable to precast taphole clay of different shapes and sizes, adapting to different blast furnace operating conditions and tuyeres plugging requirements, demonstrating wide applicability.
[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A negative pressure blast furnace tuyeres blocking device, characterized in that, Includes a rod assembly and a negative pressure assembly disposed at the end of the rod assembly; The rod assembly includes a connecting rod, which is a hollow rod. A piston is installed inside the connecting rod, and a push-pull rod is installed on the piston located on the opposite side of the negative pressure assembly. The push-pull rod can drive the piston to reciprocate axially inside the connecting rod. The negative pressure component includes a suction cup. In the working state, the suction cup's adsorption cavity is attached to the surface of the drilling mud. The suction cup is provided with a hollow bolt that communicates with the suction cup's adsorption cavity. The suction cup is placed at the end of the connecting rod, and the hollow bolt is inserted into the connecting rod.
2. The negative pressure blast furnace tuyeres blocking device according to claim 1, characterized in that, A handle is provided on the push-pull rod away from the piston side, and an axial through hole is provided on the connecting rod. The end of the handle extends to the outside of the connecting rod through the through hole.
3. The negative pressure blast furnace tuyeres blocking device according to claim 1 or 2, characterized in that, A connecting disc is fitted onto the hollow bolt at the connection position with the suction cup, and a first fastener for fixing the connecting disc and the suction cup is fitted onto the hollow bolt; The first fastener is fitted with a connecting bolt, and a second fastener for fixing the connecting bolt and the connecting disc is fitted on the hollow bolt located at the upper end of the connecting bolt. The end of the connecting rod is provided with an internal thread, and the suction cup is connected to the internal thread of the connecting rod through the external thread on the connecting bolt, and the connecting disc abuts against the mounting end face of the connecting rod.
4. The negative pressure blast furnace tuyeres blocking device according to claim 2, characterized in that, The connecting rod located at the through hole is provided with a handle slot, and the handle can be placed in the handle slot to achieve continuous adsorption of the drilling mud.
5. The negative pressure blast furnace tuyeres blocking device according to claim 3, characterized in that, A sealing ring is provided between the connecting bolt and the connecting disc.
6. The negative pressure blast furnace tuyeres blocking device according to claim 3, characterized in that, Both the first fastener and the second fastener are fastening nuts.
7. The negative pressure blast furnace tuyeres blocking device according to claim 1, characterized in that, The connecting rod is a spliced structure, including a first rod and a second rod with threaded connection.