Hydraulic clay gun head

Abstract

The utility model belongs to the technical field of blast furnace ironmaking equipment, and discloses a hydraulic clay gun head. When the hydraulic clay gun head is used for blocking the blast furnace taphole, the structure of the gun nozzle restrains the second connecting part from thermal expansion deformation, so that a gap is not easily generated between the gun nozzle and the gun head pad, and the blocking effect is prevented from being influenced by stemming leakage. The first plugging part and the gun nozzle are matched in an abutting mode through the outer conical surface and the inner conical surface, so that at least part of the first plugging part can be embedded into the gun nozzle, when the hydraulic clay gun head makes contact with molten iron and is burnt out, most burning-out positions are concentrated on the gun head cushion, and a worker only needs to quickly replace the gun head cushion; and the continuous production interruption of the blast furnace due to air reduction, pressure reduction and even damping down of the blast furnace caused by long-time maintenance and replacement of the hydraulic clay gun head is avoided. The protection of the gun head body is further improved through the false gun head, the false gun head can be conveniently and rapidly replaced through the insertion connection mode of the false gun head and the gun head pad, and the maintenance speed of the hydraulic clay gun head is further increased.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace ironmaking equipment, and in particular to a hydraulic mud gun head. Background Technology

[0002] The blast furnace taphole sealing device is a key piece of equipment in the ironmaking process, used to quickly and safely seal the taphole after tapping to prevent molten iron and slag from overflowing. Hydraulic mud guns, due to their high thrust and precision, have become the mainstream equipment for sealing modern blast furnace tapholes. However, during the installation process, contact between the gun head and molten iron can easily cause the lower part of the gun head to burn out, leading to molten iron overflowing from the burned area.

[0003] The related technology discloses a hydraulic mud gun for plugging the iron taphole lip, including a ring-shaped cap that is fitted around the outer circumference of the gun body. The lip is coaxially inserted into the inner surface of the front end of the cap. When the lip is burned, the hydraulic mud gun can be repaired by quickly replacing the lip, avoiding long-term maintenance that could lead to reduced blast and pressure in the blast furnace or even shutdown, thus interrupting the continuous production of the blast furnace.

[0004] However, when the cap of the hydraulic mud cannon used to plug the taphole of the blast furnace is fitted around the outside of the cannon body, the high temperature environment can cause the cannon body and the cap to expand unevenly, resulting in gaps between the cannon body and the cap. The mud leaks at the gaps, affecting the sealing effect of the hydraulic mud cannon. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic mud gun head to solve the technical problem in the prior art where high-temperature environments easily cause inconsistent thermal expansion of the gun body and the gun cap, resulting in gaps between the gun body and the gun cap.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Hydraulic mud gun head, including:

[0008] The gun head body includes a first connecting part and a nozzle that are connected to each other. The first connecting part has a hollow cavity, and the nozzle has a first flow channel that communicates with the hollow cavity. The end face of the nozzle away from the first connecting part is an inner conical surface that is inclined toward the first connecting part.

[0009] The gun head pad includes a second connecting part and a first sealing part that are connected to each other. Both the second connecting part and the first sealing part are provided with a second flow channel that communicates with the first flow channel. The second connecting part can be inserted into the first flow channel. The first sealing part is provided with an outer conical surface on the side near the second connecting part. The outer conical surface can abut and cooperate with the inner conical surface.

[0010] The dummy cannon head includes a third connecting part and a second sealing part that are connected to each other. Both the third connecting part and the second sealing part have a third flow channel that communicates with the second flow channel. The third connecting part can be inserted into the second flow channel, and the second sealing part can abut against the first sealing part.

[0011] Optionally, the first sealing part can at least cover the end face of the nozzle away from the first connecting part, and the second sealing part can at least cover the first sealing part.

[0012] Optionally, the inclination angle of the inner conical surface ranges from 30° to 45°, and the inclination angle of the outer conical surface is consistent with the inclination angle of the inner conical surface.

[0013] Optionally, the gun head pad and the gun head body are connected by a pin, and the dummy gun head and the gun head pad are connected by a pin.

[0014] Optionally, the gun head pad and the gun head body are connected by a hydraulic locking mechanism, and the dummy gun head and the gun head pad are connected by a hydraulic locking mechanism.

[0015] Optionally, the gun head body is provided with multiple cooling channels, through which external cooling fluid can enter the gun head body.

[0016] Optionally, the hydraulic mud gun head also includes a detection module, which is used to monitor the burn-out status of the hydraulic mud gun head in real time.

[0017] Optionally, the gun head body is made of heat-resistant steel substrate.

[0018] Optionally, the gun head pad is made of tungsten carbide composite material.

[0019] Optionally, the dummy cannon head is made of graphite-silicon nitride composite material.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a hydraulic mud gun head. The gun head pad connects to the nozzle by inserting a second connecting part into the first flow channel. When sealing the blast furnace taphole, the nozzle structure constrains the thermal expansion and deformation of the second connecting part to a certain extent, making it less likely for gaps to form between the nozzle and the gun head pad, thus preventing mud leakage from affecting the sealing effect. Furthermore, the first sealing part and the nozzle are engaged by the outer and inner conical surfaces, allowing at least a portion of the first sealing part to be embedded in the nozzle. When the hydraulic mud gun head burns upon contact with molten iron, the burns are mostly concentrated on the gun head pad, allowing for quick replacement by the operator. This avoids the need for prolonged maintenance and replacement of the hydraulic mud gun head, which could lead to reduced blast furnace blast, pressure, or even shutdown, interrupting continuous blast furnace production. Furthermore, the dummy cannon head is connected to the cannon head pad by inserting the third connecting part into the second flow channel, which further increases the protection of the cannon head body. Moreover, the connection method between the dummy cannon head and the cannon head pad facilitates the quick replacement of the dummy cannon head. When the burn is only located on the dummy cannon head, the staff can quickly replace the dummy cannon head, which further improves the maintenance speed of the hydraulic mud cannon head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the hydraulic mud gun head according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the nozzle and head pad structure described in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Gun head body; 11. First connecting part; 12. Gun nozzle; 121. First flow channel; 122. Inner conical surface; 2. Gun head pad; 21. Second connecting part; 211. Second flow channel; 22. First sealing part; 221. Outer conical surface; 3. Dummy gun head; 31. Third connecting part; 311. Third flow channel; 32. Second sealing part. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-2 As shown, this utility model provides a hydraulic mud gun head, including a gun head body 1, a gun head pad 2, and a dummy gun head 3. The gun head body 1 includes a first connecting portion 11 and a nozzle 12 connected to each other. The first connecting portion 11 has a hollow cavity for mud flow. The nozzle 12 has a first flow channel 121 communicating with the hollow cavity. The end face of the nozzle 12 away from the first connecting portion 11 is an inner conical surface 122 inclined towards the first connecting portion 11. The gun head pad 2 includes a second connecting portion 21 and a first sealing portion 22 connected to each other. Both the second connecting portion 21 and the first sealing portion 22 have a second flow channel 211 communicating with the first flow channel 121. The second connecting portion 21 can be inserted into the first flow channel 121. The first sealing portion 22 has an outer conical surface 221 on the side near the second connecting portion 21, which can abut against the inner conical surface 122. The dummy cannon head 3 includes a third connecting part 31 and a second sealing part 32 that are interconnected. Both the third connecting part 31 and the second sealing part 32 have a third flow channel 311 that communicates with the second flow channel 211. The third connecting part 31 can be inserted into the second flow channel 211, and the second sealing part 32 can abut against the first sealing part 22.

[0031] Specifically, when the hydraulic mud gun is used for sealing the blast furnace taphole, the mud enters the gun head body 1 and flows sequentially through the hollow cavity, the first flow channel 121, the second flow channel 211, and the third flow channel 311, and then enters the blast furnace taphole from the third flow channel 311 to form a refractory mud bag. The gun head pad 2 connects to the nozzle 12 by inserting the second connecting part 21 into the first flow channel 121. When sealing the blast furnace taphole, the structure of the nozzle 12 constrains the thermal expansion and deformation of the second connecting part 21 to a certain extent, making it less likely for gaps to form between the nozzle 12 and the gun head pad 2, thereby preventing mud leakage from affecting the sealing effect. Furthermore, the first sealing part 22 and the nozzle 12 are engaged through the outer conical surface 221 and the inner conical surface 122, allowing at least a portion of the first sealing part 22 to be embedded in the nozzle 12. When the hydraulic mud gun head burns upon contact with molten iron, the burn location is mostly concentrated on the gun head pad 2. Workers can quickly replace the gun head pad 2, avoiding prolonged maintenance and replacement of the hydraulic mud gun head that could lead to reduced blast furnace airflow, pressure reduction, or even shutdown, thus interrupting continuous blast furnace production. Even further, the dummy gun head 3 connects to the gun head pad 2 by inserting the third connecting part 31 into the second flow channel 211, further enhancing the protection of the gun head body 1. Moreover, the connection method between the dummy gun head 3 and the gun head pad 2 facilitates quick replacement of the dummy gun head 3. When the burn location is only on the dummy gun head 3, workers can quickly replace it, further improving the maintenance speed of the hydraulic mud gun head.

[0032] Furthermore, the first sealing part 22 can at least cover the end face of the nozzle 12 away from the first connecting part 11, and the second sealing part 32 can at least cover the first sealing part 22. The first sealing part 22 covering the end face of the nozzle 12 away from the first connecting part 11 effectively prevents molten iron from contacting the nozzle 12 and causing it to burn. The second sealing part 32 covering the first sealing part 22 effectively prevents molten iron from contacting the first sealing part 22 and causing it to burn. It is understood that the coverage area of ​​the first sealing part 22 can exceed the area of ​​the end face of the nozzle 12 away from the first connecting part 11, and the coverage area of ​​the second sealing part 32 can exceed the area of ​​the first sealing part 22.

[0033] Optionally, the inclination angle of the inner conical surface 122 ranges from 30° to 45°, for example, 30°, 35°, 40°, or 45°, and the inclination angle of the outer conical surface 221 is consistent with the inclination angle of the inner conical surface 122. Within the inclination range of 30° to 45°, the contact pressure between the nozzle 12 and the head pad 2 is increased, effectively reducing the gap between the contact sections of the inner conical surface 122 and the outer conical surface 221, further limiting the penetration of high-pressure gun clay or molten iron.

[0034] For example, the cannon head pad 2 and the cannon head body 1 are connected by a pin, which improves the connection stability between the cannon head pad 2 and the cannon head body 1 and effectively prevents the cannon head pad 2 from falling off the cannon head body 1. The dummy cannon head 3 and the cannon head pad 2 are connected by a pin, which improves the connection stability between the dummy cannon head 3 and the cannon head pad 2 and effectively prevents the dummy cannon head 3 from falling off the cannon head pad 2.

[0035] In other embodiments, the gun head pad 2 and the gun head body 1 can also be connected by a hydraulic locking mechanism, which further improves the connection stability between the gun head pad 2 and the gun head body 1. The hydraulic locking mechanism is also easy to unlock, facilitating quick replacement of the gun head pad 2. Similarly, the dummy gun head 3 and the gun head pad 2 can also be connected by a hydraulic locking mechanism, further improving the connection stability between the dummy gun head 3 and the gun head pad 2, and facilitating quick replacement of the dummy gun head 3.

[0036] Optionally, the gun head body 1 is provided with multiple cooling channels inside, and the external low-temperature cooling fluid can enter the gun head body 1 through the multiple cooling channels, which can reduce the temperature of the gun head body 1 to a certain extent and prevent the hydraulic mud gun head from being burned by molten iron.

[0037] For example, the hydraulic mud gun head also includes a detection module for real-time monitoring of the burn-off status of the hydraulic mud gun head. Specifically, the detection module is an infrared temperature measurement module, which can monitor the burn-off status of the hydraulic mud gun head in real time. When burn-off occurs, workers can repair the hydraulic mud gun head in a timely manner to prevent molten iron from overflowing from the burn-off location and causing injury to the workers.

[0038] Optionally, the gun head body 1 is made of heat-resistant steel substrate, which is suitable for extreme working conditions such as high temperature, high stress and high corrosion. Compared with traditional materials, it extends the service life of the gun head body 1.

[0039] For example, the gun head pad 2 is made of tungsten carbide composite material, which significantly improves the wear resistance, high temperature resistance and thermal shock resistance of the gun head pad 2 under extreme conditions, and reduces the probability of the gun head pad 2 being burned by molten iron.

[0040] Optionally, the dummy cannon head 3 is made of graphite-silicon nitride composite material, which greatly improves the instantaneous ultra-high temperature resistance and resistance to molten iron burn-off performance of the dummy cannon head 3.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A hydraulic mud gun head, characterized in that, include: The gun head body (1) includes a first connecting part (11) and a nozzle (12) connected to each other. The first connecting part (11) has a hollow cavity inside. The nozzle (12) has a first flow channel (121) that communicates with the hollow cavity. The end face of the nozzle (12) away from the first connecting part (11) is an inner conical surface (122) that is inclined toward the first connecting part (11). The gun head pad (2) includes a second connecting part (21) and a first sealing part (22) that are connected to each other. Both the second connecting part (21) and the first sealing part (22) are provided with a second flow channel (211) that communicates with the first flow channel (121). The second connecting part (21) can be inserted into the first flow channel (121). The first sealing part (22) has an outer conical surface (221) on the side near the second connecting part (21). The outer conical surface (221) can abut against the inner conical surface (122). The dummy cannon head (3) includes a third connecting part (31) and a second sealing part (32) that are connected to each other. Both the third connecting part (31) and the second sealing part (32) have a third flow channel (311) that communicates with the second flow channel (211). The third connecting part (31) can be inserted into the second flow channel (211), and the second sealing part (32) can abut against the first sealing part (22).

2. The hydraulic mud gun head according to claim 1, characterized in that, The first sealing part (22) can at least cover the end face of the nozzle (12) away from the first connecting part (11), and the second sealing part (32) can at least cover the first sealing part (22).

3. The hydraulic mud gun head according to claim 1, characterized in that, The inclination angle of the inner conical surface (122) ranges from 30° to 45°, and the inclination angle of the outer conical surface (221) is consistent with the inclination angle of the inner conical surface (122).

4. The hydraulic mud gun head according to claim 1, characterized in that, The cannon head pad (2) and the cannon head body (1) are connected by a pin, and the dummy cannon head (3) and the cannon head pad (2) are connected by a pin.

5. The hydraulic mud gun head according to claim 1, characterized in that, The gun head pad (2) and the gun head body (1) are connected by a hydraulic locking mechanism, and the dummy gun head (3) and the gun head pad (2) are connected by a hydraulic locking mechanism.

6. The hydraulic mud gun head according to claim 1, characterized in that, The gun head body (1) is provided with multiple cooling channels inside, and external cooling fluid can enter the gun head body (1) through the multiple cooling channels.

7. The hydraulic mud gun head according to claim 1, characterized in that, The hydraulic mud gun head also includes a detection module, which is used to monitor the burn-out status of the hydraulic mud gun head in real time.

8. The hydraulic mud gun head according to any one of claims 1-7, characterized in that, The gun head body (1) is made of heat-resistant steel substrate.

9. The hydraulic mud gun head according to any one of claims 1-7, characterized in that, The gun head pad (2) is made of tungsten carbide composite material.

10. The hydraulic mud gun head according to any one of claims 1-7, characterized in that, The dummy cannon head (3) is made of graphite-silicon nitride composite material.

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