Adjusting device of blast furnace coal injection gun and blast furnace coal injection gun assembly

Abstract

This utility model relates to the field of metallurgical engineering technology and discloses an adjustment device and assembly for a blast furnace pulverized coal injection lance. The adjustment device includes a frame, a base, a lead screw, a moving assembly, and a drive device. The base is fixed to the frame, and a connecting member is provided on the side of the base facing the pulverized coal injection lance. The connecting member is used to fix the pulverized coal injection lance to the locking bolt of the ball valve. The lead screw extends along a first direction, parallel to the barrel of the pulverized coal injection lance, and one end of the lead screw is rotatably mounted on the base around its own axis. The moving assembly includes a nut and an extension member fixed to the nut and extending outward perpendicular to the nut's axis. The nut is threadedly engaged with the lead screw and moves along the first direction. The end of the extension member away from the nut is connected to the hammer of the pulverized coal injection lance. The drive device is mounted on the frame and connected to the lead screw for driving the lead screw to rotate, causing the nut to reciprocate along the first direction. This adjustment device saves time and effort in adjusting the pulverized coal injection lance, has high safety, and improves adjustment efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical engineering technology, and in particular to an adjustment device for a blast furnace pulverized coal injection lance and a blast furnace pulverized coal injection lance assembly. Background Technology

[0002] The pulverized coal injection lance is a common device in the blast furnace ironmaking industry, directly inserted into the blast furnace's direct-fired pipe. The direct-fired pipe contains high-pressure hot air at over 1000℃. The pulverized coal injection lance is connected to the ball valve of the direct-fired pipe via a ball valve locking mechanism, sealed by locking bolts and their sealing components. Due to the clamping force of the sealing components, the insertion depth of the pulverized coal injection lance cannot be manually adjusted. Therefore, existing designs incorporate a hammer on the pulverized coal injection lance, which is manually struck to adjust the insertion depth within the direct-fired pipe. However, this method is not only time-consuming and labor-intensive but also lacks fine-tuning and precision. Furthermore, the manual hammering significantly damages the sealing components of the ball valve locking bolts, easily causing air leakage, which not only shortens the pulverized coal injection lance's lifespan but also poses safety hazards.

[0003] Therefore, improving the adjustment efficiency, accuracy, and safety of pulverized coal injection guns is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustment device and assembly for a blast furnace pulverized coal injection lance. This adjustment device is used for adjusting the pulverized coal injection lance, which saves time and effort, is highly safe, and effectively improves adjustment efficiency and accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adjustment device for a blast furnace pulverized coal injection lance, comprising:

[0007] Frame;

[0008] A base is fixed to the frame, and a connector is provided on the side of the base facing the pulverized coal gun. The connector is used to fix the pin valve with the locking bolt.

[0009] A lead screw extending along a first direction, the axis of which is arranged parallel to the barrel of the pulverized coal gun, and one end of the lead screw is rotatably mounted on the base around its own axis.

[0010] A movable assembly includes a nut and an extension fixed to the nut and extending outward in a direction perpendicular to the nut's axis. The nut is threadedly engaged with the lead screw and moves in the first direction. One end of the extension away from the nut is used to connect to the hammer blade of the pulverized coal gun.

[0011] The drive device, which is installed on the frame and connected to the lead screw, is used to drive the lead screw to rotate so that the nut reciprocates along the first direction.

[0012] In the aforementioned adjustment device for the blast furnace pulverized coal injection lance, the base is fixed to the locking bolt of the ball valve. The ball valve is fixed to the wall of the direct-fire pipe. The pulverized coal injection lance barrel passes through the ball valve and extends into the direct-fire pipe. The pulverized coal injection lance is locked onto the ball valve of the direct-fire pipe via the ball valve locking mechanism. Specifically, the locking bolt and its sealing assembly achieve a seal. The locking bolt of the ball valve is fixed to both the ball valve and the direct-fire pipe. The locking bolt of the ball valve is located on one side of the outer wall of the direct-fire pipe. The base is fixedly connected to the locking bolt, supporting the adjustment device. One end of a lead screw is rotatably connected to the base, and the nut engages with the lead screw thread. This allows the nut to reciprocate along the lead screw. An extension plate is provided on the outer periphery of the nut, and the hammer on the coal injection gun also extends in the second direction. The extension plate is fixedly connected to the hammer on the coal injection gun. The hammer of the coal injection gun is set on the main body of the coal injection gun. Then, the drive device drives the lead screw to rotate, and the nut can move along the lead screw in the first direction. It is connected to the hammer of the coal injection gun through the extension plate, which can drive the coal injection gun to move in the first direction, so that the coal injection gun has a relative displacement with respect to the locking bolt of the ball valve. The gun barrel is pulled out or inserted in at the tube wall of the straight blowing pipe to realize the adjustment of the coal injection gun. The aforementioned coal injection gun adjustment uses a mechanical structure to achieve automatic adjustment, saving manpower and reducing the labor intensity of workers. Compared with manual hammering, it avoids damage to the sealing components of the locking bolts of the ball valve caused by hammering, preventing air leakage from the coal injection gun and effectively eliminating the safety hazards caused by hammering. It is also conducive to extending the service life of the coal injection gun. In addition, relying on the mechanical structure for adjustment improves the adjustment efficiency, and the use of nuts and screws to drive the relative movement of the coal injection gun with respect to the locking bolts of the ball valve results in high adjustment accuracy, enabling fine-tuning and precise adjustment.

[0013] Therefore, the aforementioned adjustment device for blast furnace pulverized coal injection lances, when applied to the adjustment of pulverized coal injection lances, saves time and effort, ensures high safety, and effectively improves adjustment efficiency and accuracy.

[0014] Optionally, the end of the extension away from the nut is provided with a groove, which engages with the hammer blade of the pulverized coal gun to achieve a snap-fit ​​fixation with the hammer blade of the pulverized coal gun.

[0015] Optionally, the connector has a slot on the side facing the pulverized coal gun that is adapted to the locking bolt of the ball valve, and the slot engages with the locking bolt of the ball valve.

[0016] Optionally, the frame further includes a limiting structure, which is located on the side of the moving component away from the base and opposite to the other end of the lead screw, and the limiting structure is fixed to the base.

[0017] Optionally, one end of the lead screw is connected to the base via a bearing.

[0018] Optionally, the drive device includes a motor, a micro pneumatic rotating device, or a micro hydraulic rotating device.

[0019] Optionally, the adjustment device of the blast furnace pulverized coal injection lance further includes a control device, which is signal-connected to the drive device;

[0020] The drive device includes a controller, which has a forward button, a reverse button, and a stop button.

[0021] Optionally, when the driving device is a motor, the driving device is provided with a switch and a switching key for controlling the power connection direction of the driving device.

[0022] Optionally, the frame is a housing, and the lead screw, the nut, the base, and the drive device are all located inside the housing. The base is fixed to the housing, and the housing of the drive device is fixed to the housing.

[0023] The housing is provided with a guide groove extending along the first direction, and the extension member passes through the guide groove and slides in cooperation with the guide groove.

[0024] Based on the same design concept, this solution also provides a blast furnace pulverized coal injection lance assembly, including a pulverized coal injection lance and an adjustment device for any of the blast furnace pulverized coal injection lances provided in the above technical solutions. The pulverized coal injection lance includes a lance body and a barrel connected to the lance body. The barrel is used to insert into the blast furnace direct-fired pipe. A hammer is provided on the outer side of the lance body, extending in a direction perpendicular to the axis of the barrel. The axis of the lead screw of the adjustment device is parallel to the axis of the barrel. The extension of the adjustment device is fixed to the hammer. The connector of the adjustment device is used to fix the locking bolt of the ball valve. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0026] Figure 1 A schematic diagram of an adjustment device and a coal injection gun provided in an embodiment of this utility model;

[0027] Figure 2 This is a cross-sectional structural schematic diagram of an adjustment device provided in an embodiment of the present utility model.

[0028] Icons: 1-Frame; 2-Base; 3-Connector; 4-Screw; 5-Nut; 6-Extension; 7-Drive device; 8-Pulverized coal gun; 9-Locking bolt; 31-Slot; 61-Groove; 81-Hammer; 82-Main body of gun; 83-Barrel. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0030] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] refer to Figure 1 and Figure 2As shown, this utility model provides an adjustment device for a blast furnace pulverized coal injection lance, including: a frame 1, a base 2, a lead screw 4, a moving component, and a driving device 7. The base 2 is fixed to the frame 1, and a connecting piece 3 is provided on the side of the base 2 facing the pulverized coal injection lance 8. The connecting piece 3 is used to fix it to the locking bolt 9 of the ball valve. The axis of the lead screw 4 extends along a first direction and is parallel to the barrel 83 of the pulverized coal injection lance 8. The lead screw 4 can rotate around its own axis. One end of the lead screw 4 is installed on the base 2 and rotatably connected to it. Specifically, the lead screw 4 includes a first end and a second end. The first end of the lead screw 4 is rotatably connected to the base 2. The length of the lead screw 4 can be set according to different conditions at the blast furnace site. For example, the length of the lead screw 4 can be selected within the range of 0.8m to 1m, preferably... One end of the lead screw 4 is connected to the base 2 via a bearing, reducing wear between the lead screw 4 and the base 2 and effectively protecting the structure of the lead screw 4 and the base 2. Preferably, a bearing seat is provided on the base 2, and the bearing is installed on the bearing seat. The first end of the lead screw 4 is fixed to the inner ring of the bearing. The moving component includes a nut 5 and an extension 6 fixedly connected to the nut 5. The extension 6 extends outward in a direction perpendicular to the axis of the nut 5. The extension direction of the extension 6 can be called the second direction, which is perpendicular to the first direction. The nut 5 is threadedly engaged with the lead screw 4 and can move along the first direction on the lead screw 4. The end of the extension 6 away from the nut 5 is used to connect with the hammer 81 of the coal injection gun 8. The drive device 7 is installed on the frame 1 and is connected to the lead screw 4 for transmission. The drive device 7 is used to drive the lead screw 4 to rotate so that the nut 5 reciprocates along the first direction.

[0032] In the aforementioned adjustment device for the blast furnace pulverized coal injection lance, the base 2 is fixed to the locking bolt 9 of the ball valve. The ball valve is fixed to the wall of the direct-fired pipe. The barrel 83 of the pulverized coal injection lance 8 passes through the ball valve and extends into the direct-fired pipe. The pulverized coal injection lance 8 is locked onto the ball valve of the direct-fired pipe via the ball valve locking mechanism. Specifically, the locking bolt 9 and its sealing assembly achieve a seal. The locking bolt 9 of the ball valve is fixed to both the ball valve and the direct-fired pipe. The locking bolt 9 of the ball valve is located on one side of the outer wall of the direct-fired pipe. The base 2 is fixedly connected to the locking bolt 9, supporting the adjustment device for the blast furnace pulverized coal injection lance. One end of the lead screw 4 is rotatably connected to the base 2, and the nut 5 is threadedly engaged with the lead screw 4, allowing... Nut 5 can reciprocate along lead screw 4. An extension plate is provided on the outer periphery of nut 5. Hammer 81 on coal injection gun 8 also extends in the second direction. The extension plate is fixedly connected to hammer 81 on coal injection gun 8. Hammer 81 of coal injection gun is set on the gun body 82 of coal injection gun 8. Then, drive device 7 drives lead screw 4 to rotate, nut 5 can move along lead screw 4 in the first direction, and is connected to hammer 81 of coal injection gun through extension plate. It can drive coal injection gun to move in the first direction, so that coal injection gun relative to the locking bolt 9 of ball valve produces relative displacement. Gun barrel 83 is pulled out or inserted in the tube wall of straight blowing pipe to realize the adjustment of coal injection gun. The above-mentioned coal injection gun adjustment adopts a mechanical structure to achieve automatic adjustment, saving manpower and reducing the labor intensity of workers. Compared with manual hammering, it avoids damage to the sealing components of the locking bolt 9 of the ball valve caused by hammering, avoids air leakage of the coal injection gun, effectively eliminates the safety hazards caused by hammering, and helps to extend the service life of the coal injection gun. In addition, relying on the mechanical structure for adjustment improves the adjustment efficiency, and the use of nut 5 and lead screw 4 to drive the coal injection gun to move relative to the locking bolt 9 of the ball valve results in high adjustment accuracy, which can achieve fine adjustment and precise adjustment.

[0033] Therefore, the aforementioned adjustment device for blast furnace pulverized coal injection lances, when applied to the adjustment of pulverized coal injection lances, saves time and effort, ensures high safety, and effectively improves adjustment efficiency and accuracy.

[0034] In one possible implementation, combining Figure 1 ,like Figure 2As shown, in the above-mentioned adjustment device for the blast furnace pulverized coal injection gun, the extension 6 has a groove 61 at the end away from the nut 5. The groove 61 is sleeved with the hammer 81 of the pulverized coal injection gun to achieve a snap-fit ​​fixation with the hammer 81 of the pulverized coal injection gun. The end of the extension 6 with the groove 61 forms a fastener for the hammer 81. The groove 61 is set on the fastener for the hammer 81. Specifically, after the groove 61 of the extension 6 is engaged with the hammer 81, in the first direction, one side wall of the groove 61 contacts the hammer 81, and the gap between the other side wall of the groove 61 and the hammer 81 is 5 mm to 8 mm, so that the groove 61 and the hammer 81 are in clearance fit in the first direction, making it easy for the hammer 81 to be inserted into the groove 61. The connector 3 has a slot 31 on the side facing the pulverized coal gun that is adapted to the locking bolt 9 of the ball valve. The slot 31 engages with the locking bolt 9 of the ball valve. One end of the connector 3 with the slot 31 forms a bolt fastener. The bolt fastener has the slot 31. The slot 31 of the bolt fastener is fitted onto the locking bolt 9 of the ball valve. The slot 31 and the locking bolt 9 are fitted with a clearance in the third direction, so that the clearance between the slot 31 and the locking bolt 9 in the third direction is 5 mm to 8 mm. The third direction is perpendicular to the first direction and perpendicular to the second direction. When installing and connecting the adjusting device to the coal injection gun, the slot 31 of the connector 3 can be pre-installed with the locking bolt 9 of the ball valve. The extension 6 and the hammer 81 still have a certain gap in the second direction. The drive device 7 is started to move the extension 6 in the first direction until the extension plate and the hammer 81 are aligned in the second direction. Then the hammer 81 is inserted into the groove 61 of the extension plate and locked in place, so that the slot 31 of the connector 3 and the locking bolt 9 of the ball valve are fully engaged and connected, thereby completing the installation of the adjusting device and the coal injection gun.

[0035] The groove 61 of the extension piece 6 directly engages with the hammer piece 81, resulting in a simple, secure, and reliable connection. This allows the extension piece to apply force to the hammer piece 81, moving it. The slot 31 of the connecting piece directly engages with the locking bolt 9 of the ball valve, ensuring a simple, reliable, and convenient installation that improves efficiency. Furthermore, during disassembly, after disconnecting the power, simply lift the adjusting device upwards to detach the extension piece from the extension piece and the connecting piece 3 from the locking bolt 9 of the ball valve, completing the disassembly process quickly and easily.

[0036] In the aforementioned adjustment device for the blast furnace pulverized coal injection lance, the frame 1 also includes a limiting structure. This limiting structure is located on the side of the moving component away from the base 2 and is opposite to the other end of the lead screw 4. The limiting structure is fixed to the base 2 and is used to restrict the movement of the extension member 6 in the first direction. The limiting structure is opposite to the second end of the lead screw 4, and it restricts the movement of the extension member 6 in the direction from the first end to the second end, preventing excessive movement of the extension member 6 in this direction and avoiding collisions with other components of the adjustment device.

[0037] In one possible implementation, the adjustment device for the blast furnace pulverized coal injection lance described above includes a drive unit with an output rotating shaft, which can rotate clockwise or counterclockwise. Specifically, the drive unit may include a motor, a micro pneumatic rotating device, or a micro hydraulic rotating device.

[0038] Specifically, the aforementioned adjustment device for the blast furnace pulverized coal injection lance also includes a control device, which is signal-connected to the drive device 7. The drive device 7 includes a controller with forward, reverse, and stop buttons. When the forward button is pressed, the drive device 7 starts, and the output rotating shaft rotates forward, driving the lead screw 4 to rotate forward, allowing the nut 5 to move towards the base 2, thus advancing the pulverized coal injection lance relative to the ball valve. When the stop button is pressed, the drive device 7 stops working, also serving as an emergency stop. When the reverse button is pressed, the drive device 7 starts, and the output rotating shaft reverses, driving the lead screw 4 to reverse, allowing the nut 5 to move away from the base 2, thus retracting the pulverized coal injection lance relative to the ball valve. The controller allows for remote control and adjustment of the pulverized coal injection lance.

[0039] As another approach to setting up the control device, it can also include a control module and a control panel. The control module pre-stores the driver program for the drive device, allowing operation and control of the drive device via the control panel. This enables intelligent and precise adjustment of the coal injection gun's insertion depth. Furthermore, the control module can connect to the air outlet signal acquisition module of the direct-fired pipe, receiving and analyzing the air outlet signal to obtain the coal injection gun's insertion depth. This result is then used to control the drive device to adjust the insertion depth of the coal injection gun, achieving intelligent adjustment. Additionally, the control module includes a fast-retreat command, enabling the coal injection gun to retract quickly under special circumstances.

[0040] In one possible implementation, when the drive device is a motor, it is equipped with a switch and a key for controlling the power supply direction. The switch and key can be directly mounted on the motor housing, allowing for direct and convenient operation. For example, the motor can be a variable frequency motor, a servo motor, or a micro DC motor, with a manual switch on the motor housing. During adjustment, the motor voltage can be initially controlled to the midpoint of its rated operating voltage range. For fine-tuning, the voltage can be controlled below the midpoint of the rated operating voltage range, allowing for slow rotation and low-speed adjustment. In special circumstances, such as blast furnace blast interruption or shutdown, the control module can obtain tuyeres information and control the motor to operate at its maximum rated operating voltage, enabling the pulverized coal injection gun to quickly retract to its limit position and protect the pulverized coal injection gun.

[0041] Based on the aforementioned adjustment device for blast furnace pulverized coal injection lances, such as Figure 1As shown, the frame 1 is a shell with an internal accommodating space. The lead screw 4, nut 5, base 2, and drive device 7 are all housed within this space. The base 2 is fixed to the shell, and the outer shell of the drive device 7 is also fixed to the shell. The shell encloses all components, providing protection. For example, the output rotation shaft of the drive device 7 can be coaxially arranged with the lead screw 4 and directly connected via a coupling. The outer shell of the drive device 7 is clamped and fixed to the shell, and the base 2 is also clamped and fixed to the interior of the shell. A guide groove extending in a first direction is provided on the shell. The guide groove allows the extension member 6 to extend out, passing through and slidingly engaging with it. The side of the guide groove in the first direction can form a limiting part, limiting the movement of the extension member 6 in the first direction. The limiting part at the second end of the lead screw 4 can also form a limiting structure, eliminating the need for an additional limiting structure and simplifying the overall structure of the adjustment device.

[0042] Regarding the specific application of the aforementioned adjustment device, since multiple pulverized coal injection guns are installed on the blast furnace direct-fired pipe, the adjustment device can be installed and adjusted with one pulverized coal injection gun, then disassembled and installed with another pulverized coal injection gun for adjustment; alternatively, multiple adjustment devices can be prepared, with one adjustment device installed on each pulverized coal injection gun, so that multiple pulverized coal injection guns can be adjusted simultaneously, thereby improving the efficiency of pulverized coal injection gun adjustment work.

[0043] Based on the same design concept, such as Figure 1 As shown, this embodiment also provides a blast furnace pulverized coal injection lance assembly, specifically including a pulverized coal injection lance and any of the adjustment devices provided in the above embodiments. The pulverized coal injection lance includes a lance body 82 and a barrel 83 connected to the lance body 82. The barrel 83 is used to insert into the blast furnace direct-fired pipe. A hammer 81 extending along a direction perpendicular to the axis of the barrel 83 is provided on the outer side of the lance body 82. The axis of the lead screw 4 of the adjustment device is parallel to the axis of the barrel 83. The extension 6 of the adjustment device is fixed to the hammer 81. The connecting part 3 of the adjustment device is used to fix the locking bolt 9 of the ball valve. In the above blast furnace pulverized coal injection lance assembly, the pulverized coal injection lance is adjusted using an adjustment device, which saves time and effort, has high safety, and effectively improves adjustment efficiency and accuracy.

[0044] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjusting device for a coal injection lance of a blast furnace, characterized in that include: Frame; A base is fixed to the frame, and a connector is provided on the side of the base facing the pulverized coal gun. The connector is used to fix the pin valve with the locking bolt. A lead screw extending along a first direction, the axis of which is arranged parallel to the barrel of the pulverized coal gun, and one end of the lead screw is rotatably mounted on the base around its own axis. A movable assembly includes a nut and an extension fixed to the nut and extending outward in a direction perpendicular to the nut's axis. The nut is threadedly engaged with the lead screw and moves in the first direction. One end of the extension away from the nut is used to connect to the hammer blade of the pulverized coal gun. The drive device, which is installed on the frame and connected to the lead screw, is used to drive the lead screw to rotate so that the nut reciprocates along the first direction.

2. The adjustment device for the blast furnace pulverized coal injection lance according to claim 1, characterized in that, The extension is provided with a groove at the end away from the nut. The groove engages with the hammer blade of the coal injection gun to achieve a snap-fit ​​and fixation with the hammer blade of the coal injection gun.

3. The adjustment device for the blast furnace pulverized coal injection lance according to claim 1, characterized in that, The connector has a slot on the side facing the pulverized coal gun that is adapted to the locking bolt of the ball valve. The slot engages with the locking bolt of the ball valve.

4. The adjusting device for a blast furnace pulverized coal injection lance according to claim 1, characterized in that, The frame also includes a limiting structure, which is located on the side of the moving component away from the base and opposite to the other end of the lead screw. The limiting structure is fixed to the base.

5. The adjusting device for a blast furnace pulverized coal injection lance according to claim 1, characterized in that, One end of the lead screw is connected to the base via a bearing.

6. The adjusting device for a blast furnace pulverized coal injection lance according to claim 1, characterized in that, The driving device includes a motor, a micro pneumatic rotating device, or a micro hydraulic rotating device.

7. The adjusting device for a blast furnace pulverized coal injection lance according to claim 6, characterized in that, It also includes a control device, which is signal-connected to the drive device; The drive device includes a controller, which has a forward button, a reverse button, and a stop button.

8. The adjusting device for a blast furnace pulverized coal injection lance according to claim 6, characterized in that, When the driving device is a motor, the driving device is equipped with a switch and a switching key for controlling the power supply direction of the driving device.

9. The adjusting device for a blast furnace pulverized coal injection lance according to any one of claims 1-8, characterized in that, The frame is a shell, and the lead screw, the nut, the base, and the drive device are all located inside the shell. The base is fixed to the shell, and the outer shell of the drive device is fixed to the shell. The housing is provided with a guide groove extending along the first direction, and the extension member passes through the guide groove and slides in cooperation with the guide groove.

10. A blast furnace pulverized coal injection lance assembly, characterized in that, The device includes a pulverized coal injection lance and an adjustment device for the pulverized coal injection lance as described in any one of claims 1-9, wherein the pulverized coal injection lance includes a lance body and a lance barrel connected to the lance body, the lance barrel being inserted into a blast furnace direct-fired pipe, a hammer extending along a direction perpendicular to the axis of the lance barrel being provided on the outer side of the lance body, the axis of the lead screw of the adjustment device being parallel to the axis of the lance barrel, the extension of the adjustment device being fixed to the hammer, and the connecting member of the adjustment device being used for fixing the locking bolt of the ball valve.

Images