Hot blast stove pipe tensioning device

Abstract

This utility model relates to the technical field of hot blast stove equipment, specifically to a hot blast stove pipe tensioning device connected to the hot blast stove. It includes a hot blast main pipe, a hot blast surrounding pipe, hot blast branch pipes, a connecting pipe, a first tie rod assembly, and a second tie rod assembly. The hot blast main pipe includes a first clamp fitted over the main pipe. The hot blast surrounding pipe includes a connecting pipe, a surrounding pipe, and a second clamp fitted over the surrounding pipe; the connecting pipe communicates with the surrounding pipe. The hot blast branch pipe connects the hot blast main pipe and the hot blast stove, and includes a third clamp fitted over the branch pipe. The connecting pipe is connected at both ends to the hot blast main pipe and the connecting pipe, and includes a fourth clamp fitted over the connecting pipe. The first tie rod assembly connects the first clamp and the third clamp. The second tie rod assembly connects the second clamp and the fourth clamp. The first and second tie rod assemblies stably connect the hot blast main pipe, the hot blast branch pipe, and the connecting pipe, preventing weld breaks and air leaks between pipes, thus ensuring the overall structural stability of the hot blast stove pipe system.

Description

Technical Field

[0001] This utility model relates to the technical field of hot blast stove equipment, specifically to a hot blast stove pipe tensioning device. Background Technology

[0002] As an important auxiliary equipment in ironmaking, the improvement of hot blast stoves can bring good economic benefits to blast furnace smelting. High-temperature hot blast stoves have developed rapidly in China. With the improvement of metallurgical technology and equipment, as well as good operating standards, blast furnaces are now capable of handling high blast temperatures.

[0003] However, due to the air outlet system of the hot blast stove, its outlet switches back and forth between combustion and air supply. This causes the connection between the hot blast branch pipe and the main hot blast pipe to both to become red-hot and hot, affecting the connection between the branch pipe and both the hot blast stove and the main hot blast pipe, and even leading to weld breaks and air leaks. Current technologies typically employ welding repairs, grouting, or external packaging repairs to maintain the stable operation of the hot blast stove. However, these repair methods are cumbersome, require highly skilled maintenance personnel, are difficult to maintain for extended periods, and are not conducive to subsequent stable production. Utility Model Content

[0004] This utility model was made to solve the above-mentioned technical problems. Its purpose is to provide a hot blast stove pipe tensioning device, which uses tie rods and clamps to tighten the connection between the hot blast main pipe and the hot blast stove, as well as between the hot blast main pipe and the connecting pipe, thereby eliminating deformation, cracking and other phenomena at the interface of the hot blast stove pipe.

[0005] This utility model provides a hot air furnace pipe tensioning device, comprising: a hot air main pipe, including a first clamp and a second clamp fitted outside the hot air main pipe; a hot air branch pipe, connecting the hot air main pipe and the hot air furnace, including a third clamp fitted outside the hot air branch pipe; a hot air surrounding pipe, connected to the hot air main pipe; a first tie rod assembly, arranged along the axial direction of the hot air branch pipe, connected to the first clamp and the third clamp; and a second tie rod assembly, arranged along the axial direction of the hot air main pipe, connected to the second clamp and the hot air surrounding pipe.

[0006] Preferably, the hot air main pipe includes a first main pipe, a second main pipe, and a connecting pipe, the connecting pipe being connected between the first main pipe and the second main pipe, the first main pipe being connected to the hot air branch pipe, and the second main pipe being connected to the hot air enclosure pipe; the connecting pipe includes a fourth clamp fitted outside the connecting pipe, and the second tie rod assembly being connected to the second clamp and the fourth clamp.

[0007] Preferably, the angle between the first main tube and the second main tube is an obtuse angle.

[0008] Preferably, it also includes two connectors, which are disposed at both ends of the second tie rod assembly and connected to the second clamp and the fourth clamp.

[0009] Preferably, the hot air main pipe, the hot air surrounding pipe, and the hot air branch pipe are provided with a fire-resistant layer.

[0010] Preferably, the central axes of the first clamp and the third clamp are perpendicular to each other.

[0011] Preferably, the first tie rod assembly is threadedly connected to the first clamp and the third clamp, and the second tie rod assembly is threadedly connected to the second clamp and the fourth clamp.

[0012] Preferably, the first clamp, the second clamp and the main hot air pipe are all welded together, and the third clamp and the branch hot air pipe are all welded together.

[0013] Preferably, multiple hot air branch pipes are provided and connected in parallel to the hot air main pipe.

[0014] Preferably, the second tie rod assembly includes multiple tie rods and a bolt buckle assembly, wherein the bolt buckle assembly includes a bolt buckle and two bolts facing opposite directions, the two bolts connecting two adjacent tie rods to the bolt buckle.

[0015] Based on the above description and practice, the hot air furnace pipe tensioning device of this utility model, connected to the hot air furnace, includes a hot air main pipe, a hot air branch pipe, a hot air surrounding pipe, a first tie rod assembly, and a second tie rod assembly. The hot air main pipe includes a first clamp and a second clamp fitted outside the hot air main pipe. The hot air branch pipe connects the hot air main pipe and the hot air furnace, and includes a third clamp fitted outside the hot air branch pipe. The hot air surrounding pipe connects to the hot air main pipe. The first tie rod assembly is arranged along the axial direction of the hot air branch pipe and is connected to the first clamp and the third clamp. This ensures that when the hot air flow exits from the outlet of the hot air furnace and passes through the hot air branch pipe, the first tie rod assembly can further reinforce the connection between the hot air branch pipe and the hot air main pipe and the hot air furnace along the extension direction of the hot air branch pipe. This prevents the connection between the pipes from being impacted when the hot air flow temperature is high and the flow rate is large, which could lead to pipe deformation and hot air leakage. The second tie rod assembly is arranged axially along the hot air main pipe and connects to the second clamp and the hot air surrounding pipe. This also prevents the hot air main pipe from deforming due to the impact of the hot air flow when the temperature and flow rate are high, thus avoiding hot air leakage. The first and second tie rod assemblies stably connect the hot air main pipe, hot air branch pipe, and hot air surrounding pipe, preventing weld breaks and air leaks between pipes during normal operation of the hot blast stove, and ensuring the overall structural stability of the hot blast stove piping. Attached Figure Description

[0016] Figure 1This is a top view of a hot blast stove pipe tensioning device according to one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the hot blast stove pipe tensioning device in one embodiment of the present invention.

[0018] Figure 3 For the present utility model Figure 1 A magnified structural diagram of point A in the middle.

[0019] Figure 4 For the present utility model Figure 1 A magnified structural diagram at point B in the middle.

[0020] Reference numerals: 1. Hot air main pipe; 10. Hot air furnace; 11. First clamp; 12. Second clamp; 13. First main pipe; 14. Second main pipe; 15. Connecting pipe; 16. Fourth clamp; 2. Hot air branch pipe; 21. Third clamp; 3. Hot air surrounding pipe; 4. First tie rod assembly; 41. Branch pipe tie rod; 42. Adjusting bolt; 5. Second tie rod assembly; 51. Tie rod; 52. Bolt fastener assembly; 53. Bolt fastener; 54. Bolt; 6. Connecting piece; 7. Hot air valve. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0022] Furthermore, the accompanying drawings are merely illustrative diagrams of this utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this utility model disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] This utility model discloses a hot blast stove pipe tensioning device. Please refer to [reference needed]. Figures 1 to 4 The hot blast stove pipe tensioning device is connected to the hot blast stove 10. The hot blast stove pipe tensioning device includes a main hot blast pipe 1, a branch hot blast pipe 2, a surrounding hot blast pipe 3, a first tie rod assembly 4, and a second tie rod assembly 5. The main hot blast pipe 1 includes a first clamp 11 and a second clamp 12 fitted onto the outside of the main hot blast pipe 1. The branch hot blast pipe 2 connects the main hot blast pipe 1 and the hot blast stove 10, and includes a third clamp 21 fitted onto the outside of the branch hot blast pipe 2. The surrounding hot blast pipe 3 connects to the main hot blast pipe 1. The first tie rod assembly 4 is arranged axially along the hot air branch pipe 2 and connected to the first clamp 11 and the third clamp 21. This ensures that when the hot air flow exits the hot air furnace 10 and passes through the hot air branch pipe 2, the first tie rod assembly 4 can further reinforce the connection between the hot air branch pipe 2 and the hot air main pipe 1 and the hot air furnace 10 along the extension direction of the hot air branch pipe 2. This prevents the connection between the pipes from being impacted when the hot air flow temperature is high and the flow rate is large, thus avoiding pipe deformation and hot air leakage. The second tie rod assembly 5 is arranged axially along the hot air main pipe 1 and connected to the second clamp 12 and the hot air surrounding pipe 3. Similarly, this prevents the impact of the hot air flow when the hot air flow temperature is high and the flow rate is large, thus avoiding deformation of the hot air main pipe 1 and hot air leakage. By stably connecting the hot air main pipe 1 with the hot air branch pipe 2 and the hot air surrounding pipe 3 through the first tie rod assembly 4 and the second tie rod assembly 5, the overall structural stability of the hot air furnace 10 piping is ensured, preventing weld breaks and air leaks during normal operation of the piping.

[0025] Understandably, depending on actual environmental conditions and requirements, the hot air main pipe 1 usually needs to travel a relatively long distance to connect to the hot air surrounding pipe 3. In some embodiments, the hot air main pipe 1 includes a first main pipe 13, a second main pipe 14, and a connecting pipe 15. The connecting pipe 15 connects the first main pipe 13 and the second main pipe 14, serving as a transfer pipe for the hot air main pipe 1. The first main pipe 13 is connected to the hot air branch pipe 2, and the second main pipe 14 is connected to the hot air surrounding pipe 3. By providing the connecting pipe 15, on the one hand, the direction of the hot air main pipe 1 can be changed, further expanding the transport path of the hot air flow; on the other hand, the hot air flow in the hot air main pipe 1 can be mixed in the connecting pipe 15, thereby ensuring that the hot air flow can be transported stably, continuously, and at a constant temperature to the hot air surrounding pipe 3. The connecting pipe 15 includes a fourth clamp 16 fitted outside the connecting pipe 15. The second tie rod assembly 5 is connected to the second clamp 12 and the fourth clamp 16, further strengthening the stability of the connection between the hot air main pipes 1 and ensuring that the hot air flow can be transported stably in the hot air furnace pipeline.

[0026] Furthermore, in some embodiments, the included angle between the first main pipe 13 and the second main pipe 14 is an obtuse angle, specifically, it can be 95 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, etc., which can be adjusted according to actual needs. On the one hand, this can reduce the eddy currents generated when the hot airflow carrying dust particles turns through the connecting pipe 15, which consumes the kinetic and thermal energy of the hot airflow and causes temperature loss; on the other hand, it can reduce the damage to the hot blast stove pipes caused by dust particles when they turn with the hot airflow, thereby improving the service life of the entire hot blast stove pipes.

[0027] To ensure the stable fixing of the connecting pipe 15 to the first main pipe 13, the second main pipe 14, and the hot blast surrounding pipe 3, in some embodiments, the hot blast stove pipe tensioning device further includes two connectors 6, which are disposed at both ends of the second tie rod assembly 5 and connected to the second clamp 12 and the fourth clamp 16. This ensures stable fixing between the hot blast stove pipes and connects the hot blast main pipe 1 to the hot blast surrounding pipe 3 and other devices, allowing the hot blast airflow generated by the hot blast stove 10 to be stably transported into the surrounding pipe 3 and subsequently stably transported to the various tuyeres around the blast furnace body.

[0028] Furthermore, in some embodiments, the connector 6 is threadedly connected to the second clamp 12 and the fourth clamp 16, ensuring quick operation when installing or replacing the second tie rod assembly 5, thus avoiding impact on the production schedule.

[0029] Understandably, to further extend the lifespan of hot blast stove pipes and improve their safety, in some embodiments, refractory layers are provided inside the main hot blast pipe 1, the surrounding hot blast pipe 3, and the branch hot blast pipe 2. The refractory layer is typically a composite structure. The innermost layer, the working layer, needs to be in direct contact with the high-temperature, high-speed hot blast airflow; therefore, the innermost layer requires sufficient strength to withstand the erosion of the airflow and dust. An insulation layer is provided on the outer layer to minimize heat loss during hot blast airflow transport. A refractory fiber layer should also be provided between the working layer and the insulation layer to absorb the expansion stress generated during heating and cooling, preventing damage to the hot blast stove pipes under the impact of the hot blast airflow and ensuring normal production.

[0030] To ensure a stable connection between the hot air furnace 10 and the main hot air pipe 1 via the hot air branch pipe 2, preventing breakage due to excessive hot air flow, in some embodiments, at least two first clamps 11 are provided, respectively located on both sides of the hot air branch pipe 2, to stably install the hot air branch pipe 2 onto the main hot air pipe 1. Each first clamp 11 is connected to two first tie rod assemblies 4, resulting in a total of four first tie rod assemblies 4 used when fixing the hot air branch pipe 2 to the main hot air pipe 1. This ensures stable installation of the hot air branch pipe 2 onto the main hot air pipe 1 and prevents breakage due to excessive hot air flow from the hot air furnace 10, thus affecting the delivery of hot air.

[0031] Understandably, the first tie rod assembly 4 includes a branch tie rod 41 and an adjusting bolt 42. The two ends of the branch tie rod 41 are connected to the first clamp 11 and the third clamp 21 respectively through the adjusting bolt 42. By adjusting the amount of movement between the adjusting bolt 42 and the first clamp 11 and the third clamp 21, the impact of hot airflow on the hot air branch pipe 2 and the hot air main pipe 1 can be reduced, thus avoiding a break in the connection between the hot air branch pipe 2 and the hot air main pipe 1, which would affect the normal transport of hot airflow.

[0032] Furthermore, in some embodiments, the two first tie rod assemblies 4 on each first clamp 11 are evenly connected to the first clamp 11, ensuring that the force exerted by the first tie rod assembly 4 on the first clamp 11 is more even. This avoids damage to the first tie rod assembly 4 or the first clamp 11 under the action of hot air flow, which would affect the connection between the hot air branch pipe 2 and the hot air main pipe 1, thereby ensuring the fixed connection between the two.

[0033] Understandably, to ensure the stability of the connection between the hot air branch pipe 2 and the hot air main pipe 1, in some embodiments, the central axes of the first clamp 11 and the third clamp 21 are perpendicular to each other; that is, the hot air branch pipe 2 and the hot air main pipe 1 are arranged perpendicularly to each other. The perpendicularity of the central axes of the first clamp 11 and the third clamp 21 ensures that when the first tie rod assembly 4 is connected to the two, the direction of the force acting on the first tie rod assembly 4 is always along the extension direction of the first tie rod assembly 4, thus preventing the first tie rod assembly 4 from breaking due to an angled force. Furthermore, by setting the hot air branch pipe 2 and the hot air main pipe 1 perpendicular to each other, on the one hand, the right-angle corner can be used to more effectively guide the movement of the hot air flow during the hot air flow transportation process, and together with the inertial force, it can transport the heavier dust particles brought out of the hot air furnace 10 to a place away from the corner, so as to avoid the dust particles accumulating at the corner and affecting the normal transportation of the hot air flow; on the other hand, the right-angle setting of the hot air branch pipe 2 and the hot air main pipe 1 makes it easier to use additional support structures to support them, and it is also easier to calculate the stiffness and thermal compensation in each direction, and control the cost based on the calculated data.

[0034] In some embodiments, the first clamp 11, the second clamp 12 and the hot air main pipe 1, the third clamp 21 and the hot air branch pipe 2, and the fourth clamp 16 and the connecting pipe 15 are all welded together, which further ensures the stable connection between the clamp and the hot air furnace pipe. This avoids the clamp from separating from the hot air furnace pipe due to excessive force when the first tie rod group 4 and the second tie rod group 5 are connected to the clamp, which would prevent the first tie rod group 4 and the second tie rod group 5 from stably connecting the hot air main pipe 1 with the hot air branch pipe 2 and the hot air enclosure pipe 3, thus affecting the normal transport of hot air flow.

[0035] Understandably, the hot blast stove pipe tensioning device also includes a mounting base. The mounting base is fitted onto the main hot blast pipe 1, the branch hot blast pipe 2, the connecting pipe 15, and the surrounding hot blast pipe 3, and is used to accommodate the first clamp 11, the second clamp 12, the third clamp 21, and the fourth clamp 16, ensuring that the clamps can be stably installed on the hot blast stove pipe. Furthermore, in some embodiments, the first tie rod group 4 and the second tie rod group 5 can be directly connected to the mounting base, preventing the first tie rod group 4 and the second tie rod group 5 from directly acting on the clamps, thus avoiding damage to the clamps caused by the force exerted on them, which would affect the connection between the main hot blast pipe 1 and the branch hot blast pipe 2 and the surrounding hot blast pipe 3.

[0036] In order to achieve continuous and stable air supply from the hot air furnace 10, in some embodiments, multiple hot air furnaces 10 are arranged in parallel, and multiple hot air branch pipes 2 are arranged and connected in parallel to the hot air main pipe 1. By having multiple hot air furnaces 10 alternately supplying air, a continuous and stable hot air flow is transported into the hot air main pipe 1.

[0037] To enable switching between the air supply and heating states of the hot blast stove 10 and ensure that underheated hot air is not sent into the main hot air pipe 1 when the hot blast stove 10 is in the heating state, in some embodiments, the hot blast stove pipe tensioning device further includes a hot air valve 7. The hot air valve 7 is disposed on the hot air branch pipe 2, and the connection between the hot blast stove 10 and the main hot air pipe 1 can be opened or closed through the hot air valve 7 to adjust the connectivity in the hot blast stove pipe as needed. When multiple hot blast stoves 10 are arranged side by side, the operating state of the hot blast stove can be switched by adjusting the hot air valve 7 on different hot air branch pipes 2.

[0038] Understandably, since the second tie rod group 5 requires a relatively long tie rod 51, multiple tie rods 51 need to be connected to match the length of the hot air main pipe 1. To achieve rapid installation and removal of the tie rods, in some embodiments, the second tie rod group 5 includes multiple tie rods 51 and a bolt fastener group 52. The bolt fastener group 52 includes bolt fasteners 53 and two bolts 54 facing opposite directions. The two bolts 54 connect two adjacent tie rods 51 to the bolt fasteners 53, allowing multiple tie rods 51 to be connected sequentially until they match the length of the hot air main pipe 1. On the one hand, the movement between the bolts 54 and the bolt fasteners 53 can reduce the impact of hot airflow on the first main pipe 13, the second main pipe 14, and the connecting pipe 15, preventing gaps in the connection between the first main pipe 13, the second main pipe 14, and the connecting pipe 15, which would affect the normal transport of hot airflow. On the other hand, it accelerates the installation efficiency of the hot air furnace pipe tensioning device and allows for quick replacement of any tie rod 51 in the second tie rod group 5 if damaged, avoiding delays in normal production.

[0039] Furthermore, in some other embodiments, bolts 54 may be provided at both ends of the pull rod 51, and bolt buckles 53 may be provided with internal threads, which can also connect multiple pull rods 51 together and reduce the impact of hot airflow on the hot air main pipe 1 by the amount of movement between bolts 54 and bolt buckles 53.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hot blast stove pipe tensioning device connected to a hot blast stove, characterized in that include: The hot air main pipe includes a first clamp and a second clamp fitted outside the hot air main pipe; A hot air branch pipe, connecting the hot air main pipe and the hot air furnace, includes a third clamp fitted outside the hot air branch pipe; A hot air duct is connected to the main hot air pipe; The first tie rod assembly is arranged along the axial direction of the hot air branch pipe and is connected to the first clamp and the third clamp; The second tie rod assembly is arranged along the axial direction of the hot air main pipe and is connected to the second clamp and the hot air enclosure pipe.

2. The hot blast stove pipe tensioning device as described in claim 1, characterized in that, The hot air main pipe includes a first main pipe, a second main pipe, and a connecting pipe. The connecting pipe is connected between the first main pipe and the second main pipe. The first main pipe is connected to the hot air branch pipe, and the second main pipe is connected to the hot air enclosure pipe. The connecting pipe includes a fourth clamp fitted outside the connecting pipe, and the second tie rod assembly is connected to the second clamp and the fourth clamp.

3. The hot blast stove pipe tensioning device as described in claim 2, characterized in that, The angle between the first supervisor and the second supervisor is an obtuse angle.

4. The hot-blast stove duct tensioning device according to claim 2, characterized in that Also includes: The connectors include two parts, which are disposed at both ends of the second tie rod assembly and connected to the second clamp and the fourth clamp.

5. The hot blast stove pipe tensioning device as described in claim 2, characterized in that, The hot air main pipe, the hot air surrounding pipe, and the hot air branch pipe are provided with a fire-resistant layer.

6. The hot blast stove pipe tensioning device as described in claim 1, characterized in that, At least two first clamps are provided, respectively located on both sides of the hot air branch pipe, and each first clamp is connected to two first tie rod assemblies.

7. The hot blast stove pipe tensioning device as described in claim 6, characterized in that, The central axes of the first clamp and the third clamp are perpendicular to each other.

8. The hot blast stove pipe tensioning device as described in claim 1, characterized in that, The first clamp, the second clamp, and the main hot air pipe are all welded together, as are the third clamp and the branch hot air pipe.

9. The hot blast stove pipe tensioning device as described in claim 1, characterized in that, Multiple hot air branch pipes are provided and connected in parallel to the hot air main pipe.

10. The hot blast stove pipe tensioning device as described in claim 1, characterized in that, The second tie rod assembly includes multiple tie rods and a bolt buckle assembly. The bolt buckle assembly includes a bolt buckle and two bolts facing opposite directions, with the two bolts connecting two adjacent tie rods to the bolt buckle.

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