Slag hole blocking device for blast furnace

Abstract

The utility model belongs to blast furnace smelting equipment in steel production, and particularly relates to a slag hole blocking device for a blast furnace. The blast furnace operation can be optimized, and the stokehole labor intensity is reduced; and the purposes of reducing personnel allocation and improving working efficiency can be achieved. Comprising a plug rod, and one end of the plug rod is connected with a plug head for blocking a blast furnace slag notch; the head end of the plug rod extends into the plug head, a water inlet is formed in the plug head, a water outlet is formed in the side wall, extending out of the plug head, of the plug rod, a circulating water channel used for cooling the plug head is jointly formed between an inner cavity of the plug head and an inner cavity of the plug rod, and the circulating water channel is communicated with the water inlet and the water outlet. The tail end of the plug rod is connected with the tail end of the industrial mechanical arm through a constant force mechanism. The constant force mechanism is used for buffering or overload protection, provides constant resistance under the overload condition, and protects a blast furnace slag notch and a chock plug from being damaged. The industrial mechanical arm is used for driving the chock plug to move, and slag blocking operation of the blast furnace slag notch is achieved.

Description

Technical Field

[0001] The utility model belongs to blast furnace smelting equipment in steel production, in particular to a slag port blocking device for a blast furnace. Background Art

[0002] Throughout the ironmaking process, timely and appropriate handling of pig iron and slag is crucial to ensuring the timely and normal tapping of iron and slag from the blast furnace. This is a key measure for ensuring smooth blast furnace operation, achieving high output, high quality, low consumption, and improving the working environment. Blast furnace smelting is a continuous production process, and timely and effective removal of slag from the furnace hearth to provide ample space for the lowering of raw materials is a crucial prerequisite for maintaining stable blast furnace operation. As blast furnaces expand in size and smelting intensity increases, the standards for slag tapping are also rising. Reducing the amount of slag retained in the furnace not only optimizes blast furnace operations but also effectively reduces the workload of workers at the furnace.

[0003] However, in practice, traditional slag-mouth plugging methods have numerous shortcomings. For example, driving crushed refractory bricks into the slag-mouth passage is time-consuming and difficult to achieve a complete seal. Furthermore, operators must work in a high-temperature environment, typically requiring the collaboration of two or more people. This not only increases labor intensity but also poses significant safety risks, resulting in high labor costs and low efficiency. Summary of the Invention

[0004] This utility model addresses the shortcomings of the existing technology and provides a blast furnace slag blocking device. It can optimize blast furnace operation, reduce furnace labor intensity, reduce staffing, improve work efficiency, and meet the needs of efficient and safe blast furnace operation.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a device for blocking the slag outlet of a blast furnace, comprising a plug rod, one end of which is connected to a plug head for blocking the slag outlet of the blast furnace; the head end of the plug rod extends into the plug head, a water inlet is provided on the plug head, a water outlet is provided on the side wall of the plug rod where the plug rod extends out of the plug head, a circulating water channel for cooling the plug head is formed between the inner cavity of the plug head and the inner cavity of the plug rod, and the circulating water channel is respectively connected to the water inlet and the water outlet.

[0006] The end of the plug rod is connected to the end of the industrial robotic arm through a constant force mechanism; the constant force mechanism serves as a buffer or overload protection, providing constant resistance in overload conditions to protect the blast furnace slag outlet and the plug from damage; the industrial robotic arm is used to drive the plug to move, thereby realizing the slag plugging operation of the blast furnace slag outlet.

[0007] Furthermore, the constant force mechanism is installed at the end of the plug rod, and the industrial robot arm is connected to the constant force mechanism through a flange at the end of the robot arm.

[0008] Furthermore, a circulating water channel injects water into the inner cavity of the plug head through the water inlet, and the water is discharged from the water outlet after passing through the plug rod, so as to cool the plug head.

[0009] Furthermore, the industrial robot arm is arranged on a robot arm base for support.

[0010] Furthermore, the head end of the plug rod is fixed in the plug head by a pipe clamp, and a sealing ring for sealing is provided at the position where the plug rod extends out of the inner cavity of the plug head.

[0011] Furthermore, the blast furnace wall is connected to a parallel linkage mechanism through a cantilever bracket, and the plug rod is hinged to the parallel linkage mechanism through the connecting ear shaft, ensuring that the plug rod moves in the plane of the parallel linkage mechanism, and the plane coincides with the center line of the blast furnace slag mouth to ensure the precise movement of the plug head.

[0012] Furthermore, the parallel linkage mechanism includes parallel rod one, parallel rod two, and a cross bar, wherein parallel rod one is parallel to parallel rod two, forming a set of opposite sides of a parallelogram; the cross bar is parallel to the cantilever bracket, forming another set of opposite sides of the parallelogram; one end of parallel rod one and parallel rod two is hinged to the cantilever bracket, and the other end of parallel rod one and parallel rod two is hinged to the cross bar; and the cross bar is horizontal; the cross bar is rotatably connected to the plug rod through a connecting ear shaft to ensure that the plug rod moves within the plane of the parallel linkage mechanism.

[0013] Furthermore, the constant force mechanism includes a buffer bin connected to the industrial robot arm, the buffer bin is provided with a built-in chamber and a guide hole connected to the chamber, a buffer spring and a guide shaft are installed in the chamber; one end of the guide shaft is located in the chamber and abuts against the buffer spring; the other end of the guide shaft passes through the guide hole and is connected to the first end of a clamp, and the guide shaft can slide back and forth along the guide hole; the second end of the clamp is detachably connected to the end of the plug rod.

[0014] Furthermore, a proximity sensor is provided at the first end of the clamp and one side of the guide shaft for detecting the compression stroke of the buffer spring to determine whether the blast furnace slag opening is completely blocked.

[0015] Furthermore, a pressure plate is provided at one end of the guide shaft extending into the chamber, and the pressure plate applies force to the buffer spring; a dustproof bellows is also provided outside the guide shaft, between the clamp and the buffer bin, one end of the dustproof bellows is connected to the clamp, and the other end of the dustproof bellows is connected to the buffer bin, which is used to protect the guide shaft and the proximity sensor from dust contamination.

[0016] Compared with the prior art, the utility model has beneficial effects.

[0017] This utility model is used for blast furnace slag plugging. A constant force mechanism is installed at the end of the plug rod, acting as a buffer or overload protection device. This mechanism provides constant resistance in overload conditions, protecting the blast furnace slag port and plug from damage. Furthermore, this slag plugging device utilizes unmanned operation, with a robotic arm driving the plug rod in a standardized motion to achieve slag plugging. Because the robotic arm's movements can be edited through standard operations, the device is stable, reliable, and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0019] Figure 1 This is a main view of a blast furnace slag port blocking device.

[0020] Figure 2 This is a partially enlarged view of the constant force mechanism used in the blast furnace slag port blocking device.

[0021] Figure 3 It is a schematic diagram of the assembly relationship between the plug rod and the plug head.

[0022] In the figure, 1, blast furnace wall, 2, blast furnace slag outlet, 3, plug, 4, plug rod, 5, cantilever bracket, 6, parallel rod 1, 7, parallel rod 2, 8, cross bar, 9, water inlet, 10, water outlet, 11, connecting trunnion, 12, constant force mechanism, 13, industrial robot arm, 14, robot arm base, 15, robot arm end flange, 16, pipe clamp, 17, pressure plate, 18, pipe clamp;

[0023] 1201. Clamp, 1202. Dustproof bellows, 1203. Buffer bin, 1204. Guide shaft, 1205. Guide hole, 1206. Buffer spring, 1207. Proximity sensor. DETAILED DESCRIPTION

[0024] In order to better understand the technical solution of the present invention, a specific implementation plan is provided as follows; and the following solution is only for illustration.

[0025] like Figure 1-3As shown, the present invention is a device for plugging a blast furnace slag port, comprising a plug rod 4, one end of which is connected to a plug head 3 for plugging the blast furnace slag port 2. The head end of the plug rod 4 extends into the plug head 3, and a water inlet 9 is provided on the plug head 3. A water outlet 10 is provided on the side wall of the plug rod where the plug rod 4 extends out of the plug head 3. A circulating water channel for cooling the plug head 3 is formed between the inner cavity of the plug head 3 and the inner cavity of the plug rod 4. The circulating water channel is connected to the water inlet 9 and the water outlet 10, respectively. Water is injected into the inner cavity of the plug head 3 through the water inlet 9, and then discharged from the water outlet 10 after passing through the plug rod 4, thereby cooling the plug head 3. The head end of the plug rod 4 is fixed to the plug head 3 by a pipe clamp, and a sealing ring is provided at the position where the plug rod 4 extends out of the inner cavity of the plug head 3 for sealing. The sealing ring provided at the position where the plug rod 4 extends out of the inner cavity of the plug head 3 ensures the sealing of the circulating water channel, avoids the problem of cooling water leakage, and further ensures the safety of operation and the cleanliness of the environment. In summary, the circulating water channel formed inside the plug 3 and the plug rod 4 can effectively cool the plug 3, preventing damage due to excessive temperature when working in a high-temperature environment. This not only extends the service life of the equipment, but also ensures operational safety.

[0026] The end of the plug rod 4 is connected to the end of an industrial robot arm 13 via a constant force mechanism 12. The industrial robot arm 13 can be a six-axis robot arm, which is mounted on a supporting robot base 14. The constant force mechanism 12 acts as a buffer or overload protection, providing constant resistance in overload conditions to protect the blast furnace slag outlet 2 and the plug 3 from damage. The industrial robot arm 13 is used to drive the plug 3 to achieve slag plugging in the blast furnace slag outlet 2. The industrial robot arm 13 can also use the end flange 15 of the robot arm to drive the constant force mechanism 12 and the plug 3 out of the blast furnace slag outlet 2 to release the blockage.

[0027] Example 1: A blast furnace wall 1 is connected to a parallel linkage mechanism via a cantilever support 5. The plug rod 4 is hinged to the parallel linkage mechanism via a connecting trunnion 11, ensuring that the plug rod 4 moves within the plane of the parallel linkage mechanism. This plane coincides with the centerline of the blast furnace slag port 2 to ensure accurate movement of the plug head 3. The parallel linkage mechanism includes parallel rod 1 6, parallel rod 2 7, and a crossbar 8. Parallel rod 1 6 and parallel rod 2 7 are parallel to each other, forming one set of opposite sides of a parallelogram; crossbar 8 is parallel to the cantilever support 5, forming another set of opposite sides of the parallelogram; one end of parallel rod 1 6 and parallel rod 2 7 are hinged to the cantilever support 5, and the other ends of parallel rod 1 6 and parallel rod 2 7 are hinged to crossbar 8; and the crossbar is horizontal; crossbar 8 is rotatably connected to the plug rod 4 via a connecting trunnion 11, ensuring that the plug rod 4 moves within the plane of the parallel linkage mechanism.

[0028] The parallel linkage mechanism is connected to the blast furnace wall via a cantilever bracket 5, ensuring precise movement of the stopper rod within a plane aligned with the centerline of the blast furnace slag outlet. The mechanism, consisting of parallel rods 1 (6), 2 (7), and crossbars 8, forms a stable parallelogram structure, ensuring smooth movement of the stopper rod. Crossbars 8 are rotationally connected to the stopper rod via a connecting trunnion, enhancing the device's flexibility and adaptability. This design not only improves the accuracy and reliability of slag plugging operations but also enhances the stability and safety of the equipment.

[0029] In Example 2, a constant force mechanism 12 is mounted at the end of the plug rod 4. An industrial robot arm 13 is connected to the constant force mechanism 12 via a flange 15 at the end of the robot arm. The constant force mechanism 12 includes a buffer chamber 1203 connected to the industrial robot arm 13. The buffer chamber 1203 defines a chamber and a guide hole 1205 communicating with the chamber. The chamber houses a buffer spring 1206 and a guide shaft 1204. One end of the guide shaft 1204 is located within the chamber and abuts against the buffer spring 1206. The other end of the guide shaft 1204 extends through the guide hole 1205 and connects to the first end of a clamp 1201. The guide shaft 1204 is capable of sliding back and forth within the guide hole 1205. The second end of the clamp 1201 is detachably connected to the end of the plug rod 4. When the buffer chamber 1206 is compressed to its limit, a proximity sensor is triggered. By compressing and resetting the buffer spring 1206, the overload force can be absorbed and released, protecting the blast furnace slag hole 2 and the plug 3 from damage, thereby improving the service life and safety of the equipment.

[0030] The clamp 1201 is used to secure the plug rod 4 and is implemented as a pipe clamp or pipeline clamping block. A proximity sensor 1207 is provided at the first end of the clamp 1201, on one side of the guide shaft 1204, to detect the compression stroke of the buffer spring 1206 and determine whether the blast furnace slag opening 2 has been sealed. A pressure plate is provided at the end of the guide shaft 1204 extending into the chamber, which applies force to the buffer spring 1206. A dustproof bellows 1202 is also provided outside the guide shaft 1204, between the clamp 1201 and the buffer chamber 1203. One end of the dustproof bellows 1202 is connected to the clamp 1201, and the other end is connected to the buffer chamber 1203, protecting the guide shaft 1204 and the proximity sensor from dust contamination. Specifically, the buffer chamber (1203) utilizes a split structure with a detachable cover to facilitate installation of the guide shaft and buffer spring.

[0031] The working principle and process are as follows:

[0032] 1. When the blast furnace needs to plug the slag port, first inject circulating water from the water inlet. The circulating water flows through the plug rod cavity, passes through the plug head, and then flows out from the water outlet at the end of the plug rod to cool the plug head.

[0033] 2. The plug rod body is connected to the cross bar of the parallel linkage mechanism through a connecting trunnion, which can support the plug rod and ensure that the plug rod moves in the plane of the parallel linkage mechanism (the plane of the parallel linkage mechanism coincides with the center line of the blast furnace slag mouth).

[0034] 3. The industrial robot arm drives the constant force mechanism and the plug rod to move through the flange at the end of the robot arm (the movement path of the robot arm is edited and completed in advance. This operation can ensure that the plug is accurately plugged into the blast furnace slag mouth) to realize the movement of the plug to the blast furnace slag mouth. When the plug contacts the blast furnace slag mouth, friction is generated between the plug and the blast furnace slag mouth. Due to the reaction of the friction, the plug causes the guide shaft to run to the right in the guide hole, compressing the buffer spring in the buffer bin.

[0035] 4. The robotic arm continues to push the plug into the blast furnace slag mouth. When the plug has completely sealed the blast furnace slag mouth, the buffer spring is compressed to a certain stroke in the buffer bin (the pressure required for sealing the blast furnace slag mouth is designed in advance; when the blast furnace slag mouth is just blocked, the compression stroke of the buffer spring is a fixed value); this compression stroke just triggers the proximity sensor, indicating that the blast furnace slag mouth sealing operation is completed.

[0036] 5. When the blast furnace slag mouth is sealed, the industrial robot arm drives the constant force mechanism and the plug to be pulled out from the blast furnace slag mouth through the flange at the end of the robot arm, so that the plug is away from the blast furnace slag mouth, thereby removing the slag mouth seal.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. Therefore, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A device for plugging a slag hole in a blast furnace, comprising a plug rod (4), one end of which is connected to a plug head (3) for plugging a slag hole (2) in a blast furnace; characterized in that: The head end of the plug rod (4) extends into the plug head (3), a water inlet (9) is provided on the plug head (3), a water outlet (10) is provided on the side wall of the plug rod (4) extending out of the plug head (3), and a circulating water channel for cooling the plug head (3) is formed between the inner cavity of the plug head (3) and the inner cavity of the plug rod (4), and the circulating water channel is respectively connected to the water inlet (9) and the water outlet (10); The end of the plug rod (4) is connected to the end of an industrial robot arm (13) through a constant force mechanism (12); the constant force mechanism (12) serves as a buffer or overload protection, providing constant resistance in an overload situation to protect the blast furnace slag outlet (2) and the plug head (3) from damage; the industrial robot arm (13) is used to drive the plug head (3) to move, thereby realizing the slag blocking operation of the blast furnace slag outlet (2).

2. A blast furnace slag blocking device according to claim 1, characterized in that: The constant force mechanism (12) is installed at the end of the plug rod (4), and the industrial robot arm (13) is connected to the constant force mechanism (12) through the robot arm end flange (15).

3. The blast furnace slag blocking device according to claim 1, characterized in that: The circulating water channel injects water into the inner cavity of the plug head (3) through the water inlet (9), and the water is discharged from the water outlet (10) after passing through the plug rod (4), so as to achieve cooling of the plug head (3).

4. The blast furnace slag blocking device according to claim 1, characterized in that: The industrial robot arm (13) is arranged on a robot arm base (14) for support.

5. The blast furnace slag blocking device according to claim 1, characterized in that: The head end of the plug rod (4) is fixed in the plug head (3) by a pipe clamp, and a sealing ring for sealing is provided at the position where the plug rod (4) extends out of the inner cavity of the plug head (3).

6. The blast furnace slag blocking device according to claim 1, characterized in that: The blast furnace wall (1) is connected to a parallel link mechanism via a cantilever bracket (5), and the plug rod (4) is hinged to the parallel link mechanism via a connecting ear shaft (11), ensuring that the plug rod (4) moves within the plane of the parallel link mechanism, and the plane coincides with the center line of the blast furnace slag outlet (2) to ensure the movement of the plug head (3).

7. The blast furnace slag blocking device according to claim 6, characterized in that: The parallel link mechanism comprises a parallel rod 1 (6), a parallel rod 2 (7), and a cross bar (8), wherein the parallel rod 1 (6) is parallel to the parallel rod 2 (7), forming a set of opposite sides of a parallelogram; the cross bar (8) is parallel to the cantilever bracket (5), forming another set of opposite sides of the parallelogram; one end of the parallel rod 1 (6) and the parallel rod 2 (7) are hinged to the cantilever bracket (5), and the other end of the parallel rod 1 (6) and the parallel rod 2 (7) are hinged to the cross bar (8); and the cross bar is horizontal; the cross bar (8) is rotatably connected to the plug rod (4) through a connecting ear shaft (11), ensuring that the plug rod (4) moves within the plane of the parallel link mechanism.

8. The blast furnace slag blocking device according to claim 1, characterized in that: The constant force mechanism (12) includes a buffer bin (1203) connected to the industrial robot arm (13), the buffer bin (1203) is provided with a built-in chamber and a guide hole (1205) connected to the chamber, and a buffer spring (1206) and a guide shaft (1204) are installed in the chamber; one end of the guide shaft (1204) is located in the chamber and abuts against the buffer spring (1206); the other end of the guide shaft (1204) passes through the guide hole (1205) and is connected to the first end of a clamp (1201), and the guide shaft (1204) can slide back and forth along the guide hole (1205); the second end of the clamp (1201) is detachably connected to the end of the plug rod (4).

9. The blast furnace slag blocking device according to claim 8, characterized in that: A proximity sensor (1207) is provided at the first end of the clamp (1201) and on one side of the guide shaft (1204) for detecting the compression stroke of the buffer spring (1206) to determine whether the blast furnace slag opening (2) has been completely blocked.

10. The blast furnace slag blocking device according to claim 8, characterized in that: A pressure plate is provided at one end of the guide shaft (1204) extending into the chamber, and the pressure plate applies force to the buffer spring (1206); a dustproof corrugated sleeve (1202) is also provided outside the guide shaft (1204) and between the clamper (1201) and the buffer bin (1203), one end of the dustproof corrugated sleeve (1202) is connected to the clamper (1201), and the other end of the dustproof corrugated sleeve (1202) is connected to the buffer bin (1203), and is used to protect the guide shaft (1204) and the proximity sensor from dust contamination.

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