Auxiliary inspection tool for blast furnace tuyere

Abstract

The utility model discloses an auxiliary inspection tool for a blast furnace tuyere, comprising a compressed air pipe, a hose and an oxygen blowing pipe connected in sequence, wherein a switch valve is installed on the compressed air pipe, and a tuyere is installed on the free end of the oxygen blowing pipe, wherein the tuyere comprises a plurality of scattered air pipes coaxially set, wherein the scattered air pipe is trumpet-shaped, and the oxygen blowing pipe extends into the tuyere. The auxiliary inspection tool for a blast furnace tuyere of the utility model has a simple structure and is easy to operate. After the oxygen blowing pipe is connected to the compressed air pipe through the hose, the compressed air in the compressed air pipe is led to the tuyere by using the hose and the oxygen blowing pipe, so that the tuyere forms a positive air pressure toward the blast furnace, which can effectively prevent the flame in the blast furnace from entering the tuyere, thereby making the tuyere free of flame obstruction, and the tuyere can be manually inspected, and during the inspection process, the internal situation of the tuyere is clear at a glance, and the inspection accuracy is high.

Description

Technical Field

[0001] The utility model relates to the technical field of iron-making blast furnaces, in particular to an auxiliary inspection tool for blast furnace tuyere. Background Art

[0002] During the blast furnace production process, the inner cavity of the tuyere sleeve is prone to slag or coke spurts out. When the furnace is inactive or the slag is not completely discharged, it may even cause slag filling in the tuyere blowpipe. To avoid the impact on blast furnace production, the tuyere needs to be inspected after the blast furnace is shut down. After the inspection, if coke slag, slag, or even slag filling is found in the tuyere, the tuyere should be cleaned immediately. After the blast furnace is shut down, there is no wind entering the blast furnace, and the high-temperature gas pressure in the furnace is greater than that outside the furnace. The flame in the blast furnace will spray out, so the situation inside the blowpipe cannot be observed and inspected with the naked eye.

[0003] There are three existing methods for checking air vents:

[0004] First, observe the tuyere imaging during the shutdown to determine whether there is slag filling. Slag filling in the blast furnace may occur not only before the shutdown, but also after the shutdown. If the backflow valve is opened after the shutdown, the slag that has not been discharged may be led into the blowpipe, causing slag filling. Although the above method can check whether there is slag filling in the tuyere during the shutdown, it cannot determine whether there is slag filling after the shutdown, and the inspection ability is limited.

[0005] The second method is to open the large cover of the tuyere blowpipe after the wind is stopped to observe whether there is slag flowing out of the blowpipe. Under this method, when there is a large amount of slag in the tuyere blowpipe, it can be observed; when there is a small amount of slag in the tuyere blowpipe and it does not flow out from the rear end of the blowpipe, it cannot be observed, and the accuracy of the slag judgment is low.

[0006] The third method is to plug all the tuyere with water cannon mud after the wind is stopped, and then check the tuyere blowpipe. This method takes a long time to check the tuyere, with a large workload, and may also prolong the wind-off time, affecting production efficiency. Utility Model Content

[0007] The utility model aims to provide an auxiliary inspection tool for a blast furnace tuyere.

[0008] The technical solution for achieving the purpose of the utility model is: an auxiliary inspection tool for a blast furnace tuyere, comprising a compressed air pipe, a hose and an oxygen blowing pipe, wherein the compressed air pipe, the hose and the oxygen blowing pipe are connected end to end in sequence, a switch valve is installed on the compressed air pipe, a tuyere is installed on the free end of the oxygen blowing pipe, the tuyere comprises a plurality of coaxially mounted scattered air pipes, the scattered air pipes are trumpet-shaped, adjacent scattered air pipes are radially spaced, and the gaps between adjacent scattered air pipes form scattered air channels, the tuyere has a large end and a small end, the diameter of the large end is larger than the diameter of the small end, the small end of the tuyere is coaxially connected to the free end of the oxygen blowing pipe, and the oxygen blowing pipe extends into the tuyere.

[0009] Furthermore, the large end of the air nozzle has a connecting frame, and a plurality of the air dispersion pipes are installed on the connecting frame.

[0010] Furthermore, the connecting frame is a cross.

[0011] The utility model is an auxiliary inspection tool for blast furnace tuyere, by sequentially connecting the hose and the oxygen blowing pipe to the compressed air pipe, so that after the switch valve on the compressed air pipe is opened, the compressed air in the compressed air pipe can pass through the hose and the oxygen blowing pipe in sequence, and be sprayed out by the tuyere installed on the free end of the oxygen blowing pipe. When the tuyere is inspected after the blast furnace is shut down, the oxygen blowing pipe is extended into the tuyere, the tuyere faces the blast furnace, and the compressed air sprayed from the tuyere enters the tuyere, so that the tuyere forms a positive air pressure toward the blast furnace, and the flame in the tuyere is blown back into the blast furnace, so that the tuyere can be manually inspected when there is no flame in the tuyere.

[0012] The utility model provides an auxiliary inspection tool for blast furnace tuyere, which has a simple structure and is easy to operate. After the oxygen blowing pipe is connected to the compressed air pipe through the hose, the compressed air in the compressed air pipe is introduced to the tuyere by means of the hose and the oxygen blowing pipe, so that the tuyere forms a positive air pressure toward the blast furnace, which can effectively prevent the flame in the blast furnace from entering the tuyere, so that there is no flame obstruction in the tuyere. The tuyere can be inspected manually, and during the inspection process, the internal situation of the tuyere is clear at a glance because it is not affected by the flame, and the inspection accuracy is high.

[0013] In addition, the utility model is an auxiliary inspection tool for blast furnace tuyere, and the tuyere is composed of several coaxially mounted trumpet-shaped scattered air pipes, and the scattered air duct formed between adjacent scattered air pipes is also trumpet-shaped. After the compressed air passes through the trumpet-shaped scattered air duct, under the guiding action of the trumpet-shaped scattered air duct, the ejection path of the compressed air has not only an axial component but also a radial component. That is to say, while the compressed air is ejected axially outward, it is also ejected radially outward. The component ejected radially outward ensures the coverage of the compressed air ejection, and the cross-section of the compressed air sprayed into the tuyere is large. The compressed air with a large cross-section can make the flames in the middle and periphery of the tuyere be blown back into the blast furnace, and the flame removal effect in the tuyere is better, and it is more convenient and accurate to manually inspect the inside of the tuyere. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an auxiliary inspection tool for a blast furnace tuyere of the utility model;

[0015] Figure 2It is a schematic diagram of the axial cross-sectional structure of the oxygen blowing pipe and the tuyere in the auxiliary inspection tool of the blast furnace tuyere of the utility model;

[0016] Figure 3 The utility model is a structural schematic diagram of a tuyere in an auxiliary inspection tool for a blast furnace tuyere. DETAILED DESCRIPTION

[0017] The following is a detailed description of the preferred embodiment of the auxiliary inspection tool for blast furnace tuyere of the utility model in conjunction with the accompanying drawings:

[0018] like Figures 1 to 3 As shown, an auxiliary inspection tool for a blast furnace tuyere comprises a compressed air pipe 1, a hose 2 and an oxygen blowing pipe 3, wherein the compressed air pipe 1, the hose 2 and the oxygen blowing pipe 3 are connected end to end in sequence, a switch valve 11 is installed on the compressed air pipe 1, a tuyere 4 is installed on the free end of the oxygen blowing pipe 3, the tuyere 4 comprises a plurality of coaxially mounted scattered air pipes 40, the scattered air pipes 40 are trumpet-shaped, adjacent scattered air pipes 40 are radially spaced, and the gaps between adjacent scattered air pipes 40 form scattered air channels 401, the tuyere 4 has a large end 41 and a small end 42, the diameter of the large end 41 is larger than the diameter of the small end 42, the small end 42 of the tuyere 4 is coaxially connected to the free end of the oxygen blowing pipe 3, and the oxygen blowing pipe 3 extends into the tuyere 10.

[0019] The utility model is an auxiliary inspection tool for blast furnace tuyere, wherein the compressed air pipe 1 is connected to an air compressor and is used for delivering compressed air; the switch valve 11 on the compressed air pipe 1 is used for controlling the on-off supply of compressed air in the compressed air pipe 1; the hose 2 is used for connecting the compressed air pipe 1 and the oxygen blowing pipe 3; the oxygen blowing pipe 3 is used for controlling the output direction of compressed air; the tuyere 4 faces the blast furnace and is used for guiding the compressed air to be sprayed out.

[0020] The utility model is an auxiliary inspection tool for blast furnace tuyere. When inspecting the tuyere after the blast furnace is shut down, the oxygen blowing pipe 3 is manually held and extended into the tuyere 10 from the tuyere blowing pipe cover plate, and the tuyere 4 faces the blast furnace. At the same time, the switch valve 11 is opened, and the compressed air in the compressed air pipe 1 is output. The compressed air output by the compressed air pipe 1 passes through the hose 2 and the oxygen blowing pipe 3 in turn, and then is ejected from the innermost scattered air pipe 40 and the scattered air channel 401 in the tuyere 4, and ejected into the tuyere 10, so that the tuyere 10 forms a positive air pressure toward the blast furnace. Under the action of the positive air pressure, the flame in the tuyere 10 is blown back into the blast furnace, and the flame in the blast furnace will not enter the tuyere 10 again. Then, when there is no flame in the tuyere 10, the tuyere 10 is manually inspected. After the inspection, the switch valve 11 is closed, and the oxygen blowing pipe 3 is taken out from the tuyere 10.

[0021] The utility model is an auxiliary inspection tool for blast furnace tuyere, by sequentially connecting the hose 2 and the oxygen blowing pipe 3 on the compressed air pipe 1, so that after the switch valve 11 on the compressed air pipe 1 is opened, the compressed air in the compressed air pipe 1 can pass through the hose 2 and the oxygen blowing pipe 3 in sequence, and be sprayed out by the tuyere 4 installed on the free end of the oxygen blowing pipe 3. When the tuyere is inspected after the blast furnace is shut down, the oxygen blowing pipe 3 is extended into the tuyere 10, and the tuyere 4 faces the blast furnace, and the compressed air sprayed from the tuyere 4 enters the tuyere 10, so that the tuyere 10 forms a positive air pressure toward the blast furnace, and the flame in the tuyere 10 is blown back into the blast furnace, so that when there is no flame in the tuyere 10, the tuyere 10 can be manually inspected.

[0022] The utility model has a simple structure and is easy to operate. After the oxygen blowing pipe 3 is connected to the compressed air pipe 1 through the hose 2, the compressed air in the compressed air pipe 1 is introduced to the tuyere 10 by using the hose 2 and the oxygen blowing pipe 3, so that the tuyere 10 forms a positive air pressure toward the blast furnace, which can effectively prevent the flame in the blast furnace from entering the tuyere 10, so that there is no flame blocking the tuyere 10. The tuyere 10 can be inspected manually, and during the inspection, the internal situation of the tuyere 10 is clear at a glance because it is not affected by the flame, and the inspection accuracy is high.

[0023] In addition, the utility model is an auxiliary inspection tool for blast furnace tuyere, the tuyere 4 is composed of several coaxially mounted trumpet-shaped scattered air pipes 40, the scattered air duct 401 formed between adjacent scattered air pipes 40 is also trumpet-shaped, after the compressed air passes through the trumpet-shaped scattered air duct 401, under the guidance of the trumpet-shaped scattered air duct 401, the ejection path of the compressed air has not only an axial component but also a radial component, that is, while the compressed air is ejected axially outward, it is also ejected radially outward, the radially outward component ensures the coverage of the compressed air ejection, the cross-section of the compressed air ejected into the tuyere 10 is large, the compressed air with a large cross-section can make the flames in the middle and periphery of the tuyere 10 be blown back into the blast furnace, the flame removal effect in the tuyere 10 is better, and it is more convenient and accurate to manually inspect the inside of the tuyere 10.

[0024] The auxiliary inspection tool for blast furnace tuyere of the utility model is preferably provided with a connecting frame 400 at the large end 41 of the tuyere 4, and a plurality of the air dispersion pipes 40 are all installed on the connecting frame 400.

[0025] In the auxiliary inspection tool for blast furnace tuyere of the utility model, preferably, the connecting frame 400 is a cross.

[0026] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.

Claims

1. An auxiliary inspection tool for blast furnace tuyere, characterized in that: It comprises a compressed air pipe, a hose and an oxygen blowing pipe, wherein the compressed air pipe, the hose and the oxygen blowing pipe are connected end to end in sequence, a switch valve is installed on the compressed air pipe, a wind nozzle is installed on the free end of the oxygen blowing pipe, the wind nozzle comprises a plurality of coaxially mounted scattered air pipes, the scattered air pipes are trumpet-shaped, adjacent scattered air pipes are radially spaced, and the gaps between adjacent scattered air pipes form scattered air channels, the wind nozzle has a large end and a small end, the diameter of the large end is larger than the diameter of the small end, the small end of the wind nozzle is coaxially connected to the free end of the oxygen blowing pipe, and the oxygen blowing pipe extends into the wind port.

2. The auxiliary inspection tool for blast furnace tuyere according to claim 1, characterized in that: The large end of the air nozzle is provided with a connecting frame, and a plurality of the air dispersion pipes are all installed on the connecting frame.

3. The auxiliary inspection tool for blast furnace tuyere according to claim 2, characterized in that: The connecting frame is a cross.

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