An angle-adjustable blast furnace pulverized coal injection lance

Abstract

This utility model discloses an angle-adjustable blast furnace pulverized coal injection lance, relating to the technical field of blast furnace pulverized coal injection lances. It includes: a pulverized coal injection pipe with a corrugated pipe embedded near its end; an assembly ring fixedly installed inside the blast furnace tuyeres sleeve and fitted around the outside of the pulverized coal injection pipe; and an adjustment device, with multiple adjustment devices arranged in a ring array and installed inside the assembly ring, used to support the pulverized coal injection pipe. This utility model uses multiple clamping plates to simultaneously hold the pulverized coal injection pipe, making its central axis parallel to the central axis of the blast furnace tuyeres sleeve. Multiple sliding support mechanisms are telescopically adjusted to align the central axis of the pulverized coal injection pipe with the central axis of the blast furnace tuyeres sleeve. Positioning of the sliding support mechanisms allows for angle adjustment of the pulverized coal injection pipe, enabling pulverized coal to enter the blast furnace along the central axis of the tuyeres sleeve.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace pulverized coal injection technology, and in particular to an angle-adjustable blast furnace pulverized coal injection gun. Background Technology

[0002] In the steel production process, blast furnace ironmaking is a crucial step, and pulverized coal injection (PCI) technology is of great significance for reducing coke ratio and cutting production costs. As the core component of the blast furnace PCI system, the performance of the pulverized coal injection lance directly affects the stable operation of the blast furnace, the lifespan of the tuyeres, and production efficiency. The angle of the pulverized coal injection gun is difficult to adjust flexibly after installation. Because the central axis of the pulverized coal injection gun is difficult to align precisely with the central axis of the blast furnace tuyeres sleeve, the direction of pulverized coal injection is prone to deviation, causing pulverized coal to scour the inner wall of the tuyeres sleeve. Long-term scouring exacerbates wear on the tuyeres sleeve, not only reducing its service life but also increasing maintenance costs and blast furnace downtime due to frequent replacements, thus affecting production continuity.

[0003] To address these issues, some technologies have attempted to improve the structure of the pulverized coal injection lance, such as using wear-resistant materials in the nozzle or changing the insertion depth. However, these methods only alleviate the problems to a limited extent and cannot fundamentally solve issues like pulverized coal scouring the tuyeres. Therefore, developing a new type of pulverized coal injection lance that can precisely adjust the angle and ensure that the central axis of the pulverized coal injection lance is highly aligned with the central axis of the blast furnace tuyeres has become a critical technical challenge that the steel industry urgently needs to overcome. Utility Model Content

[0004] The purpose of this invention is to provide an angle-adjustable blast furnace pulverized coal injection lance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an angle-adjustable blast furnace pulverized coal injection lance, comprising: A pulverized coal injection pipe, wherein a corrugated pipe is embedded near the end of the pulverized coal injection pipe; An assembly ring is fixedly installed inside the blast furnace tuyeres sleeve and is sleeved on the outside of the pulverized coal injection pipe. An adjusting device, wherein multiple adjusting devices are arranged in a ring array and the adjusting devices are installed inside the assembly ring, the adjusting devices being used to support the pulverized coal injection pipe.

[0006] Preferably, the inner side of the assembly ring has an assembly groove arranged in a ring array, and the adjustment device is installed inside the assembly groove.

[0007] Preferably, the adjusting device includes: A guide cylinder, the end of which mates with the assembly groove; A sliding support mechanism, wherein the sliding support mechanism is movably disposed inside the guide cylinder; A locking mechanism is installed inside the sliding support mechanism and is used to position the relative position between the sliding support mechanism and the guide cylinder.

[0008] Preferably, the sliding support mechanism includes: The support rod is slidably fitted with the guide cylinder; A clamping plate is fixedly connected to the end of a support rod and is used to clamp the pulverized coal injection pipe.

[0009] Preferably, the sliding support mechanism further includes: A slider, one end of which is fixedly connected to a support rod, and a groove is provided on the guide cylinder, with the slider slidingly engaging with the inner cavity of the groove.

[0010] Preferably, the snap-fit ​​mechanism includes: A connecting rod, which is slidably interlocked with the sliding support mechanism; A sliding plate, wherein the sliding plate is fixedly connected to one end of a connecting rod, and the support rod has a cavity inside, and the sliding plate slides inside the cavity; The card block is fixedly installed on the slide plate. The card block is slidably inserted and connected to the support rod. The guide cylinder has slots equidistantly opened inside, and the card block and the inner cavity of the slots cooperate with each other. A spring is movably sleeved on the outside of the connecting rod, and the spring is used to provide elastic support for the slide plate.

[0011] The technical effects and advantages of this utility model are as follows: This invention uses multiple clamping plates to simultaneously hold the pulverized coal injection pipe, ensuring that the central axis of the pulverized coal injection pipe is parallel to the central axis of the blast furnace tuyere sleeve. Based on the distance between the central axes of the pulverized coal injection pipe and the blast furnace tuyere sleeve, multiple sliding support mechanisms are extended and retracted to adjust the central axis of the pulverized coal injection pipe to coincide with that of the blast furnace tuyere sleeve. A locking mechanism is used to position the sliding support mechanisms, thus enabling angle adjustment of the pulverized coal injection pipe. When pulverized coal is injected, it enters the blast furnace along the central axis of the tuyere sleeve, preventing directional deviation from scouring the inner wall of the tuyere sleeve. This solves the problem of pulverized coal scouring the tuyere sleeve and causing accelerated wear due to angle issues in existing pulverized coal injection guns. It extends the service life of the tuyere sleeve, reduces maintenance costs caused by frequent tuyere sleeve replacements, avoids blast furnace downtime caused by replacement operations, ensures continuous blast furnace production, and improves production efficiency while reducing production costs. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the assembly ring of this utility model; Figure 3 This is a schematic diagram of the internal structure of the guide tube of this utility model; Figure 4 This is a schematic diagram of the spring structure of this utility model.

[0013] Attached Figure

[0014] 100. Pulverized coal injection pipe; 101. Corrugated pipe; 200. Assembly ring; 300. Adjustment device; 301. Guide cylinder; 302. Support rod; 303. Clamping plate; 304. Sliding block; 305. Connecting rod; 306. Slide plate; 307. Locking block; 308. Spring. Detailed Implementation

[0015] 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.

[0016] This utility model provides, for example Figures 1-4 The blast furnace pulverized coal injection lance shown includes: a pulverized coal injection pipe 100, with a corrugated pipe 101 embedded near the end of the pulverized coal injection pipe 100. When the angle of the pulverized coal injection pipe 100 is adjusted by the adjusting device 300, the pulverized coal injection pipe 100 will undergo slight positional displacement around the clamping point, such as lateral displacement or slight axial expansion and contraction. The corrugated pipe 101 is made of flexible metal or high-temperature resistant rubber, possessing excellent axial expansion and contraction and radial bending properties, and can deform synchronously with the angle adjustment of the pulverized coal injection pipe 100, avoiding rigid pulling or structural jamming caused by changes in the position of the pulverized coal injection pipe 100 during the adjustment process; an assembly ring 200, which is fixedly installed inside the blast furnace tuyeres sleeve and sleeved on the outside of the pulverized coal injection pipe 100; and an adjusting device 300, in which multiple adjusting devices 300 are arranged in a ring array and installed inside the assembly ring 200, which is used to support the pulverized coal injection pipe 100.

[0017] The inner side of the assembly ring 200 is provided with an assembly groove in a ring array, and the adjustment device 300 is installed inside the assembly groove, thereby facilitating the installation of the guide cylinder 301.

[0018] The adjusting device 300 includes: a guide cylinder 301, the end of which cooperates with the assembly groove; a sliding support mechanism, movably disposed inside the guide cylinder 301; and a locking mechanism, installed inside the sliding support mechanism, used to position the relative position between the sliding support mechanism and the guide cylinder 301. Multiple clamping plates 303 simultaneously clamp the pulverized coal injection pipe 100, thereby making the central axis of the pulverized coal injection pipe 100 parallel to the central axis of the blast furnace tuyeres sleeve. The multiple sliding support mechanisms are extended and retracted according to the distance between the central axis of the pulverized coal injection pipe 100 and the central axis of the blast furnace tuyeres sleeve, so as to... The central axis of the pulverized coal injection pipe 100 is adjusted to coincide with the central axis of the blast furnace tuyeres sleeve. With the help of the snap-fit ​​mechanism, the position of the sliding support mechanism is positioned, thereby enabling the angle adjustment of the pulverized coal injection pipe 100. When the pulverized coal is injected, it can enter the blast furnace along the central axis of the tuyeres sleeve, and will not wash away the inner wall of the tuyeres sleeve due to directional deviation. This solves the problem of pulverized coal washing away the tuyeres sleeve and causing accelerated wear due to the angle problem of the existing pulverized coal injection gun. It extends the service life of the tuyeres sleeve, reduces the maintenance costs caused by frequent replacement of the tuyeres sleeve, and avoids the blast furnace shutdown time caused by replacement operations, ensuring the continuity of blast furnace production, reducing production costs and improving production efficiency.

[0019] Specifically, the sliding support mechanism includes: a support rod 302, which is slidably engaged with the guide cylinder 301; a clamping plate 303, which is fixedly connected to the end of the support rod 302 and is used to clamp the pulverized coal injection pipe 100; and a slider 304, one end of which is fixedly connected to the support rod 302. A groove is provided on the guide cylinder 301, and the slider 304 is slidably engaged with the inner cavity of the groove. The groove provides sliding space for the slider 304, allowing it to drive the support rod 302 to slide linearly along the length of the guide cylinder 301. The support rod 302 provides support for the position of the pulverized coal injection pipe 100, and the clamping plate 303 provides clamping for the pulverized coal injection pipe 100.

[0020] The locking mechanism includes: a connecting rod 305, which is slidably inserted into the sliding support mechanism; a sliding plate 306, which is fixedly connected to one end of the connecting rod 305, and the support rod 302 has a cavity inside, with the sliding plate 306 slidably fitting inside the cavity; a locking block 307, which is fixedly installed on the sliding plate 306, and the locking block 307 is slidably inserted into the support rod 302, with the guide cylinder 301 having equally spaced locking slots inside, and the locking block 307 engaging with the inner cavity of the locking slots; and a spring 308. 08 is movably sleeved on the outside of the connecting rod 305, and the spring 308 is used to elastically support the slide plate 306. The locking block 307 can stably cooperate with the inner cavity of the slot. Through the interlocking cooperation between the locking block 307 and the slot, it is easy to limit the relative position between the guide cylinder 301 and the support rod 302, so that the support rod 302 is more stable relative to the guide cylinder 301 after the position is adjusted. The movement of the locking block 307 can be easily controlled through the connecting rod 305, so as to pull the locking block 307 to unlock the locking block 307.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle-adjustable blast furnace pulverized coal injection lance, characterized in that, include: A pulverized coal injection pipe (100) is provided with a corrugated pipe (101) near its end. Assembly ring (200), the assembly ring (200) is fixedly installed inside the blast furnace tuyeres sleeve, and the assembly ring (200) is sleeved on the outside of the pulverized coal injection pipe (100); An adjustment device (300) is provided, wherein a plurality of the adjustment devices (300) are arranged in a ring array and the adjustment devices (300) are installed inside the assembly ring (200) and the adjustment devices (300) are used to support the pulverized coal injection pipe (100).

2. The angle-adjustable blast furnace pulverized coal injection lance according to claim 1, characterized in that, The inner side of the assembly ring (200) is provided with an assembly groove in a ring array, and the adjustment device (300) is installed inside the assembly groove.

3. The angle-adjustable blast furnace pulverized coal injection lance according to claim 1, characterized in that, The regulating device (300) includes: Guide cylinder (301), the end of which cooperates with the assembly groove; A sliding support mechanism, which is movably disposed inside the guide cylinder (301); A snap-fit ​​mechanism is installed inside the sliding support mechanism and is used to position the relative position between the sliding support mechanism and the guide cylinder (301).

4. The angle-adjustable blast furnace pulverized coal injection lance according to claim 3, characterized in that, The sliding support mechanism includes: Support rod (302), which is slidably engaged with guide cylinder (301); A clamp (303) is fixedly connected to the end of a support rod (302) and is used to clamp the pulverized coal injection pipe (100).

5. The angle-adjustable blast furnace pulverized coal injection lance according to claim 4, characterized in that, The sliding support mechanism further includes: A slider (304) is fixedly connected at one end to a support rod (302). A groove is provided on the guide cylinder (301), and the slider (304) slides in cooperation with the inner cavity of the groove.

6. The angle-adjustable blast furnace pulverized coal injection lance according to claim 4, characterized in that, The latching mechanism includes: A connecting rod (305) is slidably inserted into the sliding support mechanism; A sliding plate (306) is fixedly connected to one end of a connecting rod (305). A cavity is provided inside the support rod (302), and the sliding plate (306) slides inside the cavity. The card block (307) is fixedly installed on the slide plate (306). The card block (307) is slidably inserted and connected to the support rod (302). The guide cylinder (301) has slots equidistantly opened inside. The card block (307) and the inner cavity of the slot cooperate with each other. A spring (308) is movably sleeved on the outside of the connecting rod (305), and the spring (308) is used to provide elastic support for the sliding plate (306).

Images