A blast furnace forehearth tuyere dredging device

Abstract

A blast furnace front tuyere dredging device, including height adjustment part, front sealing part, rear distance adjustment part, orientation adjustment part and beating part, the front sealing part and rear distance adjustment part are respectively arranged in height adjustment part top end face both ends, the orientation adjustment part is arranged in rear distance adjustment part close to front sealing part one end, and beating part is arranged in rear distance adjustment part away from front sealing part one end, the utility model discloses improve the dredging efficiency of tuyere, reduce the labor intensity of staff.

Description

Technical Field

[0001] This utility model relates to a dredging device, specifically a device capable of clearing blockages in blast furnace tuyeres, belonging to the technical field of blast furnace tuyere clearing equipment. Background Technology

[0002] After a blast furnace maintenance shutdown, to ensure a smooth recovery of furnace conditions after blast is resumed, some tuyeres need to be blocked before blast is resumed. After blast is resumed, the blocked tuyeres are opened in several stages depending on the progress of furnace conditions and the amount of blast used. The conventional method of clearing the tuyeres is very troublesome. First, the blast pressure must be reduced to below 120 kPa, which takes 15-25 minutes. This has a significant impact on the furnace during the recovery process and can sometimes lead to difficulties in furnace conditions or even charge suspension during the reduction and resumption of blast, prolonging the recovery process and increasing production losses. Second, when clearing the tuyeres, the tuyer inspection port cover must be opened, and hot air with a temperature of 1200°C and a pressure of 120 kPa is blown out through the inspection port. The noise from the tuyeres is extremely loud, and the high-temperature particles blown out can easily injure operators. Therefore, operators must wear masks, earplugs, and gloves to ensure safety when clearing the tuyeres. In addition, since clearing the tuyeres requires round steel with a diameter of 32mm and a length of 6000mm, and the pressure inside the furnace is high, at least 8-10 experienced and strong furnace operators are needed to complete the task. This results in the tuyeres clearing operation requiring a large number of personnel, being time-consuming and labor-intensive, and inefficient. Therefore, a clearing device is needed that can efficiently clear the blast furnace tuyeres, thereby improving production efficiency and reducing labor intensity. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a blast furnace tuyere unblocking device, which can not only reduce the labor intensity of workers, but also improve the tuyere unblocking efficiency.

[0004] The problem described in this utility model is solved by the following technical solution: A blast furnace tuyeres unblocking device includes a height adjustment section, a front sealing section, a rear adjustment section, an orientation adjustment section, and a striking section; the front sealing section and the rear adjustment section are respectively located at both ends of the top surface of the height adjustment section; the orientation adjustment section is located at the end of the rear adjustment section near the front sealing section, and the striking section is located at the end of the rear adjustment section away from the front sealing section.

[0005] The aforementioned blast furnace tuyeres unblocking device includes a height adjustment section comprising a base plate, guide rods, columns, jacks, a long plate, and casters. Casters are provided at all four corners of the bottom surface of the base plate. Columns are provided at all four corners of the top surface of the base plate, and each column has a guide hole at its top. A guide rod is inserted into each guide hole, and the top of each guide rod is connected to the side wall of the long plate. The jack is located at the center of the top surface of the base plate, and the end of its piston rod is connected to the center of the bottom surface of the long plate.

[0006] The aforementioned blast furnace tuyeres unblocking device includes a front sealing section comprising a conical hood, a pressure relief pipe, a connecting ring, and a sealing disc. The conical hood is mounted on one end of the top surface of a long plate via a bracket, with the end with the larger diameter closer to the center of the long plate than the end with the smaller diameter. The pressure relief pipe is located at the top of the conical hood and connects to the interior of the conical hood. The connecting ring is located at the interface of the conical hood with the smallest diameter, and the sealing disc is located at the end of the conical hood with the largest diameter, with a circular hole at its center.

[0007] The aforementioned blast furnace tuyeres unblocking device includes a sliding plate and a slide rail in the rear adjustment section; the top surface of the long plate is provided with a slide rail along its length, and the sliding plate is slidably mounted on the slide rail; the sliding plate is provided with a threaded hole, and a bolt passes through the threaded hole of the sliding plate and presses against the top surface of the long plate.

[0008] The aforementioned blast furnace tuyeres unblocking device includes an orientation adjustment section comprising a ring, guide plates, a slider, and locking blocks. The locking blocks are U-shaped and are engaged with the inner wall of the ring. Two locking blocks are symmetrically positioned at both ends of the ring. Two guide plates are positioned between the two locking blocks. Guide holes are provided at both ends of the slider, and two different guide plates pass through each of the two guide holes. A circular hole is provided at the center of the slider along the axis of the ring. The axis of the ring coincides with the axis of the conical cover. Threaded holes are provided on the locking blocks, and bolts pass through these holes and press against the side wall of the ring. Threaded holes are provided on the side wall of the slider, and bolts pass through these holes and press against the guide plates.

[0009] The aforementioned blast furnace tuyeres unblocking device includes a sliding bar, a base, a lifting platform, and an impact cylinder in its impact section. The top surface of the sliding plate has a groove, and the length direction of the groove is perpendicular to the length direction of the long plate. The bottom surface of the sliding bar has a guide bar, and the sliding bar slides within the groove on the top surface of the sliding plate via the guide bar. The base is located on the top surface of the sliding bar and has a hole in it, within which the lifting platform slides. The side wall of the base has a threaded hole, and a bolt passes through the threaded hole on the side wall of the base and presses against the side wall of the lifting platform. The top surface of the lifting platform has an impact cylinder, and the axis of the piston rod of the impact cylinder is parallel to the length direction of the long plate.

[0010] The aforementioned blast furnace tuyeres unblocking device involves a steel rod that passes sequentially through the central hole of the slider, the central hole of the sealing plate, the conical cover, and the docking ring before entering the tuyeres inspection hole.

[0011] This invention features a height adjustment mechanism that allows the steel rod to be adjusted to the same height as the vent's inspection hole, facilitating its passage through the hole. A front sealing mechanism ensures that the high-temperature airflow from the vent's inspection hole is ejected vertically upwards during the unblocking process, minimizing the heat exposure to workers on either side. The rear distance adjustment mechanism and orientation adjustment mechanism work together to adjust the angle of the steel rod, allowing for flexible adjustment of the piercing point within the vent. The striking mechanism provides impact force to the steel rod, enabling it to better penetrate the blockage within the vent. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0013] The list of items labeled in the diagram is as follows: 1. Base plate, 2. Guide rod, 3. Column, 4. Jack, 5. Long plate, 6. Caster wheel, 7. Conical cover, 8. Pressure relief pipe, 9. Connecting ring, 10. Sealing plate, 11. Slide plate, 12. Ring, 13. Guide plate, 14. Slider, 15. Locking block, 16. Sliding bar, 17. Base, 18. Lifting platform, 19. Impact cylinder, 20. Steel chisel. Detailed Implementation

[0014] See Figure 1 and Figure 2 This utility model includes a height adjustment part, a front sealing part, a rear distance adjustment part, an orientation adjustment part, and a striking part. The front sealing part and the rear distance adjustment part are respectively located at both ends of the top surface of the height adjustment part. The function of the front sealing part is to prevent the high-temperature wind gushing out of the vent from the viewing hole from the air vent from scorching the workers on both sides. The orientation adjustment part is located at the end of the rear distance adjustment part closer to the front sealing part, and the striking part is located at the end of the rear distance adjustment part farther from the front sealing part. The orientation adjustment part can adjust the orientation of the steel rod, thereby adjusting the landing point of the steel rod tip in the air vent for targeted breakthrough. The striking part is used to provide impact force to the steel rod, ensuring that the steel rod can be impacted and move forward. Finally, the impact force provided by the striking part to the steel rod is transmitted to the blockage part in the air vent.

[0015] The height adjustment section includes a base plate 1, guide rods 2, columns 3, jacks 4, a long plate 5, and casters 6. Casters 6 are provided at each of the four corners of the bottom surface of the base plate 1. Columns 3 are provided at each of the four corners of the top surface of the base plate 1, and each column 3 has a guide hole at its top. A guide rod 2 is inserted into each guide hole, and the top of each guide rod 2 is connected to the side wall of the long plate 5. The cooperation between the guide rods 2 and the columns 3 provides reliable guidance for the raising and lowering of the long plate. The jack 4 is located at the center of the top surface of the base plate 1, and the end of its piston rod is connected to the center of the bottom surface of the long plate 5. The jack 4 can drive the long plate 5 to rise and fall, thereby adjusting the vertical height of the steel rod.

[0016] The front sealing part includes a conical cover 7, a pressure relief pipe 8, a docking ring 9, and a sealing disc 10. The conical cover 7 is mounted on one end of the top surface of the long plate 5 via a bracket, and its larger diameter end is closer to the center of the long plate 5 than its smaller diameter end. That is, during operation, the side with the smallest diameter faces the air vent. The pressure relief pipe 8 is located at the top of the conical cover 7 and connects to the interior of the conical cover 7. Most of the high-temperature air gushing out of the air vent inspection hole is sprayed vertically upward from the pressure relief pipe 8 to minimize burns to workers on both sides of the ground. The docking ring 9 is located at the interface of the conical cover 7 at the smallest diameter end, and the sealing disc 10 is located at the end of the conical cover 7 at the largest diameter end, with a circular hole in its center.

[0017] The rear adjustment section includes a slide plate 11 and a slide rail; the top surface of the long plate 5 is provided with a slide rail along its length direction, and the slide plate 11 is slidably mounted on the slide rail; the slide plate 11 is provided with a threaded hole, and a bolt passes through the threaded hole of the slide plate 11 and presses against the top surface of the long plate 5; tightening the bolt can fix the position of the slide plate 11, thereby fixing the position of the orientation adjustment section.

[0018] The orientation adjustment part includes a ring 12, a guide plate 13, a slider 14, and a locking block 15; the orientation adjustment part can adjust the position of the end of the steel rod away from the air vent, and adjust the orientation of the steel rod by adjusting the position of the end of the steel rod.

[0019] The locking block 15 is U-shaped and is engaged with the inner wall of the ring 12. There are two locking blocks 15, symmetrically located at both ends of the ring 12. There are two guide plates 13, each positioned between the two locking blocks 15. The combination of the locking blocks 15 and guide plates 13 can rotate to any position on the ring 12; tightening the bolts on the locking blocks fixes the position of this assembly. The slider 14 has guide holes at both ends, and two different guide plates 13 pass through each of the two guide holes. The slider 14 can slide on the guide plates 13 and slide to any position on the guide plates 13. With the guide plate 13, which can be rotated and adjusted at will, the slider 14 can move to any position within the ring 12, thereby driving the end of the steel rod to adjust to any position; the center of the slider 14 is provided with a circular hole along the axis of the ring 12; the axis of the ring 12 coincides with the axis of the conical cover 7; the locking block 15 is provided with a threaded hole, and the bolt passes through the threaded hole of the locking block 15 and presses against the side wall of the ring 12; tightening the bolt on the slider 14 can fix the position of the slider 14; the side wall of the slider 14 is provided with a threaded hole, and the bolt passes through the threaded hole on the side wall of the slider 14 and presses against the guide plate 13.

[0020] The striking part includes a slide bar 16, a base 17, a lifting platform 18, and an impact cylinder 19; the top surface of the slide plate 11 is provided with a slide groove, and the length direction line of the slide groove is perpendicular to the length direction line of the long plate 5; the bottom surface of the slide bar 16 is provided with a guide bar, and the slide bar 16 is slidably disposed in the slide groove on the top surface of the slide plate 11 through the guide bar. The position of the impact cylinder 19 in the horizontal direction perpendicular to the long plate 5 is adjusted by sliding the slider 16 horizontally. The base 17 is set on the top surface of the slider 16, and a hole is provided on the base 17, in which a lifting platform 18 is slidably arranged. A threaded hole is provided on the side wall of the base 17, and a bolt passes through the threaded hole on the side wall of the base 17 and presses against the side wall of the lifting platform 18. The height of the impact cylinder 19 is adjusted by adjusting the height of the lifting platform 18. Tightening the bolt on the side wall of the base 17 fixes the height of the lifting platform 18, thus fixing the height of the impact cylinder. The impact cylinder 19 is set on the top surface of the lifting platform 18, and the axis of the piston rod of the impact cylinder 19 is parallel to the length direction of the long plate 5.

[0021] The steel rod 20 passes through the center hole of the slider 14, the center hole of the sealing plate 10, the conical cover 7, and the docking ring 9 in sequence before entering the vent inspection hole.

[0022] Operating principle: When it is necessary to clear the blockage in the air vent, push this device to the front of the air vent and open the air vent inspection hole cover to expose the air vent inspection hole. Adjust the jack so that the docking ring 9 is at the same height as the air vent inspection hole. Then push this device so that the docking ring 9 is fastened to the outside of the air vent inspection hole. At this time, most of the high-temperature air is discharged from the pressure relief pipe 8. Then insert the steel rod so that the steel rod passes through the center hole of the slider 14, the center hole of the sealing plate 10, the conical cover 7, and the docking ring 9 in sequence and enters the air vent inspection hole, and touches the blockage in the air vent. Then adjust the position of the slider 14, thereby adjusting the position of the end of the steel rod, and finally adjusting the landing point of the steel rod at the blockage in the air vent. After the steel rod is adjusted, tighten the bolts on the slider 14 and the locking block to fix the position; then adjust the position of the slide bar 16 and the position of the lifting platform 18 so that the front end of the impact cylinder 19 can be aligned with the end of the steel rod, and then tighten the bolts on the base 17 to fix the position of the lifting platform 18. After all parts are in place, start the impact cylinder. The impact cylinder continuously strikes the steel rod, which transmits the impact force to the blockage in the air vent. If one part is cleared, the position of the punching point needs to be adjusted. Simply repeat the above adjustment of the position of slider 14 and the position of the impact cylinder until the blockage in the air vent is cleared. Then, pull out the steel rod, remove the device, and close the air vent inspection hole cover.

Claims

1. A blast furnace tuyeres unblocking device, characterized in that: It includes a height adjustment section, a front sealing section, a rear adjustment section, an orientation adjustment section, and a striking section; the front sealing section and the rear adjustment section are respectively located at both ends of the top surface of the height adjustment section; the orientation adjustment section is located at the end of the rear adjustment section near the front sealing section, and the striking section is located at the end of the rear adjustment section away from the front sealing section.

2. The blast furnace tuyeres unblocking device according to claim 1, characterized in that: The height adjustment section includes a base plate (1), guide rods (2), columns (3), jacks (4), long plates (5), and casters (6); casters (6) are provided at the four corners of the bottom surface of the base plate (1); columns (3) are provided at the four corners of the top surface of the base plate (1), and each column (3) has a guide hole at its top, and a guide rod (2) is inserted into each guide hole. The top of each guide rod (2) is connected to the side wall of the long plate (5); the jack (4) is located at the center of the top surface of the base plate (1), and the end of its piston rod is connected to the center of the bottom surface of the long plate (5).

3. The blast furnace tuyeres unblocking device according to claim 2, characterized in that: The front sealing part includes a conical cover (7), a pressure relief pipe (8), a docking ring (9), and a sealing disc (10); the conical cover (7) is mounted on one end of the top surface of the long plate (5) by a bracket, and the end with a larger diameter is closer to the center of the long plate (5) than the end with a smaller diameter; the pressure relief pipe (8) is located at the top of the conical cover (7) and connects to the interior of the conical cover (7); the docking ring (9) is located at the end of the conical cover (7) with the smallest diameter, and the sealing disc (10) is located at the end of the conical cover (7) with the largest diameter, and has a circular hole in its center.

4. The blast furnace tuyeres unblocking device according to claim 3, characterized in that: The rear adjustment section includes a slide plate (11) and a slide rail; the top surface of the long plate (5) is provided with a slide rail along its length direction, and the slide plate (11) is slidably disposed on the slide rail; the slide plate (11) is provided with a threaded hole, and the bolt passes through the threaded hole of the slide plate (11) and presses against the top surface of the long plate (5).

5. The blast furnace tuyeres unblocking device according to claim 4, characterized in that: The orientation adjustment part includes a ring (12), a guide plate (13), a slider (14), and a locking block (15); the locking block (15) is U-shaped and is locked onto the inner wall of the ring (12); there are two locking blocks (15), which are symmetrically located at both ends of the ring (12); there are two guide plates (13), which are both located between the two locking blocks (15); both ends of the slider (14) are provided with guide holes, and the two guide holes are respectively Two different guide plates (13) are provided; the center of the slider (14) is provided with a circular hole along the axis of the ring (12); the axis of the ring (12) coincides with the axis of the conical cover (7); the locking block (15) is provided with a threaded hole, and the bolt passes through the threaded hole of the locking block (15) and presses against the side wall of the ring (12); the side wall of the slider (14) is provided with a threaded hole, and the bolt passes through the threaded hole on the side wall of the slider (14) and presses against the guide plate (13).

6. The blast furnace tuyeres unblocking device according to claim 5, characterized in that: The striking part includes a slide bar (16), a base (17), a lifting platform (18), and an impact cylinder (19); the top surface of the slide plate (11) is provided with a groove, and the length direction line of the groove is perpendicular to the length direction line of the long plate (5); the bottom surface of the slide bar (16) is provided with a guide bar, and the slide bar (16) is slidably disposed in the groove on the top surface of the slide plate (11) through the guide bar; the base (17) is disposed on the top surface of the slide bar (16), and the base (17) is provided with a hole, in which the lifting platform (18) is slidably disposed; the side wall of the base (17) is provided with a threaded hole, and the bolt passes through the threaded hole on the side wall of the base (17) and presses against the side wall of the lifting platform (18); the top surface of the lifting platform (18) is provided with an impact cylinder (19), and the axis of the piston rod of the impact cylinder (19) is parallel to the length direction line of the long plate (5).

7. The blast furnace tuyeres unblocking device according to claim 6, characterized in that: The steel rod (20) passes through the center hole of the slider (14), the center hole of the sealing plate (10), the conical cover (7), and the docking ring (9) in sequence before entering the air vent inspection hole.

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