Energy-saving blast furnace distributing chute

Abstract

This utility model discloses an energy-saving blast furnace charging chute, comprising: a charging chute, a weighing device installed at the upper end of the charging chute, and a weight sensor installed on the surface of the weighing device; an inner lining plate installed below the weighing device; drive gears rotatably installed on both sides of the upper end of the charging chute, and a rotating gear meshing with one side of the drive gear; a variable frequency motor connected to the center line of the drive gear; the weighing device installed at the upper end of the charging chute forms a closed-loop monitoring system with the embedded weight sensor via a data line; when the blast furnace charge falls into the charging chute through the conveyor belt, the weighing device senses the impact force of the material flow in real time, and the weight sensor synchronously converts the collected weight signal into an analog signal and transmits it to the DCS control system; the control system calculates the optimal adjustment amount according to the preset charging parameter model using a PID algorithm, and then sends a PWM speed control command to the variable frequency motor.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace charging technology, specifically an energy-saving blast furnace charging chute. Background Technology

[0002] The charging chute is a key component of a blast furnace, serving as the last channel for the furnace charge to enter the furnace body. Located at the top of the blast furnace cavity, the charging chute operates in a high-temperature environment of 400–600°C. The charge enters the charging chute at a specific flow rate, and the chute rises to a certain angle according to process requirements. Simultaneously, the charging chute rotates uniformly in the vertical direction, ensuring even distribution of the charge within the blast furnace.

[0003] A blast furnace charging chute, disclosed in publication number CN210367751U, includes a liner, an outer shell, and a chute body. The chute body is fixed between the liner and the outer shell. The outer shell has a semi-circular cross-section and includes a front outer shell and a rear outer shell, which are connected by bolts. The outer shell and the chute body are connected by elongated holes and bolts. The liner is connected to the chute body by fastening bolts, which are positioned at an angle of 68-72 degrees to both sides from the center line at the bottom of the chute. The liner includes an upper liner, a middle liner, and a bottom liner. The upper liner and the middle liner, as well as the middle liner and the bottom liner, are connected and fixed by bolt holes and fastening screws. The fastening screws are countersunk screws, and the bolt holes are tapered holes. The advantages are: the overall structure of the blast furnace charging chute is reasonable, the connection method is efficient and reliable, and the service life of the chute is extended.

[0004] In current blast furnace production, the use of the charging chute is a crucial link. When performing the charging task, these chutes need to continuously rotate in the upper region of the blast furnace throat. The purpose of this rotation is to adjust the chute's angle, optimizing the charging angle according to the actual conditions inside the blast furnace to ensure uniform charging. This rotation is driven by a motor, which needs to rotate continuously at a high frequency to ensure the chute can smoothly complete its rotation task. However, this high-frequency rotation also brings problems. It causes the rotating structure of the charging chute to suffer continuous wear and aging. Furthermore, even when the charging chute is idle, the motor continues to rotate at a high frequency, which undoubtedly increases overall energy consumption. This high energy consumption not only fails to achieve the goal of energy saving and consumption reduction but also increases equipment wear and shortens the service life of the charging chute.

[0005] Therefore, those skilled in the art have provided an energy-saving blast furnace charging chute to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this utility model is to provide an energy-saving blast furnace charging chute to solve the problem mentioned in the background art that the long-term high-frequency rotation of the existing blast furnace charging chute is not conducive to energy saving and consumption reduction, and also causes equipment wear and tear.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An energy-saving blast furnace charging chute includes: a charging chute, a weighing device installed at the upper end of the charging chute, and a weight sensor installed on the surface of the weighing device; an inner lining plate installed below the weighing device; drive gears rotatably mounted on both sides of the upper end of the charging chute, and a rotating gear meshing with one side of the drive gear; a variable frequency motor connected to the center line of the drive gear; the drive gear and the rotating gear having a meshing structure; a mounting frame installed at the bottom of the charging chute, and a telescopic cylinder installed on the front side of the mounting frame; and a stabilizing frame installed on the surface of the telescopic cylinder.

[0009] As a further improvement of this utility model: a connecting seat is fixedly installed at the output end of the telescopic cylinder, and a connecting rod is rotatably connected to the inner side of the connecting seat.

[0010] As a further embodiment of this utility model: a rotating shaft is provided between the connecting rod and the connecting seat, the connecting rod is rotatably connected to the connecting seat through the rotating shaft, and the upper end of the connecting rod is rotatably connected to the bottom of the fabric chute.

[0011] As a further embodiment of this utility model: the fabric chute and the mounting frame are a rotating structure, and the rotating gear and the fabric chute are fixedly connected.

[0012] As a further embodiment of this utility model: a bottom rod is installed at the bottom of the inner lining plate, and drag rollers are rotatably installed on the left and right sides of the bottom rod, and a movable shaft is provided between the lower end of the drag rollers and the bottom rod.

[0013] According to the energy-saving blast furnace charging chute as described in the claim, a hydraulic cylinder is installed on the outer side of the drag roller, and the lower end of the hydraulic cylinder is rotatably connected to the bottom rod; an adjusting frame is rotatably connected to the outer side of the upper end of the drag roller, and the lower end of the adjusting frame is rotatably connected to the bottom rod; the output end of the hydraulic cylinder is rotatably connected to the adjusting frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] A weighing device is installed at the upper part of the inside of the feeding chute. This weighing device forms a closed-loop monitoring system with an embedded weight sensor via a data cable. When the blast furnace charge falls into the feeding chute through the conveyor belt, the weighing device senses the impact force of the material flow in real time. The weight sensor simultaneously converts the collected weight signal into an analog signal and transmits it to the DCS control system. The control system calculates the optimal adjustment amount based on the preset feeding parameter model using a PID algorithm, and then sends a PWM speed control command to the variable frequency motor. During the feeding operation, when the material layer thickness reaches the set threshold, the variable frequency motor switches to high-frequency operation mode, driving the feeding chute to dynamically adjust the tilt angle at a high-frequency oscillation frequency. The parabolic motion trajectory achieves a uniform circular distribution of sintered ore. When the feeding chute completes its operation cycle and enters standby mode, the weight sensor continuously monitors that the load value is lower than the set threshold. At this time, the system automatically switches to energy-saving mode. The variable frequency motor then switches to low-frequency idling mode, reducing equipment power consumption and effectively avoiding wear of mechanical parts under no-load conditions, thus extending the service life of the feeding chute liner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an energy-saving blast furnace charging chute.

[0017] Figure 2 This is a schematic diagram of the external structure of an energy-saving blast furnace charging chute.

[0018] Figure 3 This is a schematic diagram of the sealing mechanism in an energy-saving blast furnace charging chute.

[0019] Figure 4 This is an enlarged schematic diagram of part A of an energy-saving blast furnace charging chute.

[0020] In the diagram: 1. Fabric chute; 2. Weighing device; 3. Weight sensor; 4. Mounting frame; 5. Rotating gear; 6. Drive gear; 7. Variable frequency motor; 8. Liner plate; 9. Telescopic cylinder; 10. Connecting rod; 11. Stabilizing frame; 12. Connecting seat; 13. Rotating shaft; 14. Base rod; 15. Drag roller; 16. Movable shaft; 17. Adjusting frame; 18. Hydraulic cylinder. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4This utility model provides an energy-saving blast furnace charging chute, comprising: a charging chute 1, a weighing device 2 installed at the upper end of the charging chute 1, a weight sensor 3 installed on the surface of the weighing device 2, an inner lining plate 8 installed below the weighing device 2, a bottom rod 14 installed at the bottom of the inner lining plate 8, and drag rollers 15 rotatably installed on the left and right sides of the bottom rod 14, a movable shaft 16 provided between the lower end of the drag rollers 15 and the bottom rod 14, a hydraulic cylinder 18 installed on the outer side of the drag rollers 15, and the lower end of the hydraulic cylinder 18 rotatably connected to the bottom rod 14, an adjusting frame 17 rotatably connected to the upper outer side of the drag rollers 15, the lower end of the adjusting frame 17 rotatably connected to the bottom rod 14, and the output end of the hydraulic cylinder 18 rotatably connected to the adjusting frame 17.

[0023] Specifically, the drag roller 15 is installed at the bottom of the inner liner plate 8 to provide support and bolster. Driven by the hydraulic cylinder 18, the adjusting frame 17 can perform precise rotation. The upper and lower ends of the adjusting frame 17 form a flexible rotational connection with the drag roller 15 and the bottom rod 14, respectively. The drag roller 15 and the bottom rod 14 are connected by a movable shaft 16, which ensures that the drag roller 15 can be erected when the adjusting frame 17 rotates. When the drag roller 15 is erected, it effectively folds up both sides of the inner liner plate 8. This action helps the furnace charge slide down faster and enter the blast furnace smoothly. When the adjusting frame 17 is erected, it drives the drag roller 15 to be erected as well, thereby folding up both sides of the inner liner plate 8. Conversely, when the adjusting frame 17 is laid flat, the inner liner plate 8 will return to its original position. In this way, the inner liner plate 8 can be easily adjusted to adapt to different operational needs.

[0024] Drive gears 6 are rotatably mounted on both sides of the upper end of the fabric chute 1, and a rotating gear 5 is meshed on one side of the drive gear 6. A variable frequency motor 7 is connected to the center line of the drive gear 6. The drive gear 6 and the rotating gear 5 are meshed. A mounting frame 4 is mounted on the bottom of the fabric chute 1, and a telescopic cylinder 9 is mounted on the front side of the mounting frame 4. A stabilizing frame 11 is mounted on the surface of the telescopic cylinder 9. A connecting seat 12 is fixedly mounted on the output end of the telescopic cylinder 9, and a connecting rod 10 is rotatably connected to the inner side of the connecting seat 12. A rotating shaft 13 is provided between the connecting rod 10 and the connecting seat 12. The connecting rod 10 is rotatably connected to the connecting seat 12 through the rotating shaft 13. The upper end of the connecting rod 10 is rotatably connected to the bottom of the fabric chute 1. The fabric chute 1 and the mounting frame 4 are rotatable. The rotating gear 5 is fixedly connected to the fabric chute 1.

[0025] Specifically, the fabric chute 1 is mounted on the mounting frame 4, and a drive gear 6 is rotatably connected to the mounting frame 4. The drive gear 6 and the rotating gear 5 are precisely meshed to ensure smooth power transmission between them. The rotating gear 5 is fixedly connected to the fabric chute 1 via a sturdy shaft, and at the same time forms a flexible rotating structure with the mounting frame 4. Driven by the variable frequency motor 7, the drive gear 6 can be rotated. Thus, through the meshing structure between the drive gear 6 and the rotating gear 5, the rotation of the fabric chute 1 is controlled. This design allows... The inclination angle of the fabric chute 1 can be precisely adjusted to achieve uniform fabric distribution. In addition, the telescopic cylinder 9 pulls the connecting rod 10 to rotate during the telescopic process. The connecting rod 10 is also rotatably connected to the telescopic cylinder 9 and the fabric chute 1. When the connecting rod 10 is pulled and tilted, it can better cooperate with the fabric chute 1 to adjust the angle. This not only helps to distribute the fabric evenly, but also provides support from the bottom of the fabric chute 1. This design avoids the fabric chute 1 being suspended in the air during rotation, thus effectively preventing the equipment from being damaged due to long-term suspended operation.

[0026] The working principle of this utility model is as follows:

[0027] When using this invention, firstly, the weighing device 2 accurately weighs the furnace charge entering the charging chute 1. The weight sensor 3 transmits the data to the control system, ensuring the consistency and accuracy of each charging operation. Simultaneously, when the blast furnace charge falls into the charging chute 1 via the conveyor belt, the weighing device 2 senses the impact force of the material flow in real time. The weight sensor 3 synchronously converts the collected weight signal into an analog signal and transmits it to the DCS control system. The control system calculates the optimal adjustment amount based on a preset charging parameter model using a PID algorithm, and then sends a PWM speed control command to the variable frequency motor 7. During the charging operation phase, when the material layer thickness reaches a set threshold, the variable frequency motor 7 switches to a high-frequency operation mode, driving the charging chute 1 to dynamically adjust its tilt angle at a high-frequency oscillation frequency. When the charging chute 1 completes its operation cycle and enters standby mode, the weight sensor 3 continues to monitor the material flow. After measuring the weight parameters, the system automatically switches to energy-saving mode, the variable frequency motor 7 starts, and drives the drive gear 6 to rotate. The meshing structure between the drive gear 6 and the rotating gear 5 ensures smooth power transmission, thereby adjusting the tilt angle of the feeding chute 1. During this process, the telescopic cylinder 9 also extends and retracts, pulling the connecting rod 10 to rotate. The rotation of the connecting rod 10 further assists in fine-tuning the angle of the feeding chute 1, ensuring that the feeding chute 1 remains stable during rotation. At the same time, the hydraulic cylinder 18 also works as needed, driving the adjusting frame 17 to rotate, thereby adjusting the angle of the drag roller 15 and the inner liner plate 8 to adapt to the sliding requirements of different furnace materials. Throughout the process, the precise coordination and flexible rotation between various components ensure the uniform distribution and efficient sliding of the furnace material, thereby improving the production efficiency and product quality of the blast furnace.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving type blast furnace distribution chute, characterized by, include: A fabric chute (1) is provided with a weighing device (2) installed at the upper end of the fabric chute (1) and a weight sensor (3) installed on the surface of the weighing device (2). An inner liner (8) is installed below the weighing device (2). Drive gears (6) are rotatably installed on both sides of the upper end of the fabric chute (1), and a rotating gear (5) is meshed on one side of the drive gear (6). A variable frequency motor (7) is connected to the center line of the drive gear (6). The drive gear (6) and the rotating gear (5) are meshed. A mounting frame (4) is installed at the bottom of the fabric chute (1), and a telescopic cylinder (9) is installed on the front side of the mounting frame (4). A stabilizing frame (11) is installed on the surface of the telescopic cylinder (9).

2. The energy-saving type blast furnace distribution chute according to claim 1, characterized in that, The output end of the telescopic cylinder (9) is fixedly installed with a connecting seat (12), and the inner side of the connecting seat (12) is rotatably connected with a connecting rod (10).

3. The energy-saving type blast furnace distribution chute according to claim 2, characterized in that, A rotating shaft (13) is provided between the connecting rod (10) and the connecting seat (12). The connecting rod (10) is rotatably connected to the connecting seat (12) through the rotating shaft (13). The upper end of the connecting rod (10) is rotatably connected to the bottom of the fabric chute (1).

4. The energy-saving blast furnace charging chute according to claim 1, characterized in that, The fabric chute (1) and the mounting frame (4) are a rotating structure, and the rotating gear (5) is fixedly connected to the fabric chute (1).

5. The energy-saving blast furnace charging chute according to claim 1, characterized in that, The bottom of the inner lining plate (8) is equipped with a bottom rod (14), and drag rollers (15) are rotatably installed on the left and right sides of the bottom rod (14). A movable shaft (16) is provided between the lower end of the drag roller (15) and the bottom rod (14).

6. The energy-saving blast furnace charging chute according to claim 5, characterized in that, A hydraulic cylinder (18) is installed on the outer side of the drag roller (15), and the lower end of the hydraulic cylinder (18) is rotatably connected to the bottom rod (14). An adjustment frame (17) is rotatably connected to the outer side of the upper end of the drag roller (15), and the lower end of the adjustment frame (17) is rotatably connected to the bottom rod (14). The output end of the hydraulic cylinder (18) is rotatably connected to the adjustment frame (17).

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