Online tuyere poking device after blast furnace coal lance transformation

Abstract

The utility model relates to the technical field of ferrous metallurgy, in particular to an on-line tuyere poking device after blast furnace coal lance transformation, which comprises a quick connector, a poking drill rod and a marble valve, one end of the quick connector is a gas connecting end, the other end of the quick connector is connected with the poking drill rod, and the marble valve comprises a first straight pipe end, a middle bent pipe end, a second straight pipe end, a marble and a sealing piece. The marble is located in the bent pipe end, and the pipe diameter of the bent pipe end is larger than that of the first straight pipe end and that of the second straight pipe end; the first straight pipe end is internally connected with a sealing piece, the sealing piece comprises a sealing ring, a spring and a wind blocking ring, the poking drill rod comprises a coal gun end and an extension end, and the interior of the poking drill rod is of a hollow structure.The on-line tuyere poking device is simple in structure, safe, reliable and capable of achieving on-line tuyere poking without reducing wind and oxygen, simplifies operation procedures, improves operation safety, and is suitable for popularization and application. And the labor intensity of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel metallurgy, in particular to an online tuyere-poking device after the blast furnace coal gun is transformed. Background Art

[0002] During the blast furnace opening and maintenance and furnace condition recovery stage, in order to ensure that the blast furnace has sufficient blast kinetic energy under low air volume during the air supply recovery stage and ensure that the furnace is gradually heated up, it is necessary to block some tuyere with brick sleeves or mud before opening the furnace. When the furnace condition is restored to a certain extent, it is necessary to poke open the blocked tuyere. In the past, the tuyere cover was directly opened, and a poke stick with two cross arms welded with threaded steel was directly inserted into the tuyere from the tuyere cover to open the blocked tuyere with the impact force of the poke stick. However, this method has the problems of large air leakage, high noise, and high risk factor in the operation process. In order to cooperate with the tuyere poking operation, the blast furnace generally needs to reduce air and oxygen.

[0003] A Chinese patent application with application number 202310289985.3 discloses a device and method for blocking and automatically opening an air vent online, including a grouting device, an inlet pipe, an outlet pipe and a blocked air vent, wherein the blocked air vent includes a blocking copper plate, and the air vent is blocked by the blocking copper plate. When the air vent needs to be opened, the inlet pipe and the outlet pipe are closed, and the castable is filled through the grouting device to make it solidify at high temperature, the auxiliary water channel is sealed, and then the blocking copper plate is melted by the furnace temperature, thereby realizing normal air supply at the air vent. However, the patent does not disclose how the castable restores the flow state, so the device can only be used once, and the device has a complex structure and needs to be equipped with an auxiliary water channel at the air vent. Utility Model Content

[0004] The utility model aims to provide an online tuyere-poking device after the blast furnace coal gun is modified. The device has a simple structure and can be reused, which can reduce the difficulty of the online tuyere-poking operation of the blast furnace and improve the safety of the tuyere-poking operation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device for online poking tuyere after modification of a blast furnace coal gun comprises a quick connector, a poking chisel and a ball valve, wherein the quick connector is connected to the poking chisel, the end of the poking chisel close to the quick connector is the tail end, two cross arms are provided, the cross arms are welded to the poking chisel, and the end of the poking chisel entering a straight blowing pipe is the head end.

[0007] The above-mentioned blast furnace coal gun is modified and the online tuyere-poking device is characterized in that the ball valve comprises a first straight pipe end, a middle curved pipe end, a second straight pipe end, a ball and a sealing member, the ball is located in the curved pipe end, and the diameter of the curved pipe end is larger than the diameters of the first straight pipe end and the second straight pipe end.

[0008] The above-mentioned blast furnace coal gun is modified into an online tuyere-poking device, wherein the first straight pipe end is internally connected to a seal, and the seal comprises a sealing ring, a spring and a wind shield ring, and an annular groove is provided inside the sealing ring, and a plurality of springs are provided in the annular groove, and the other end of the spring is connected to a wind shield ring, and the wind shield ring comprises a straight pipe in the middle and open pipes at both ends, and the open pipes are bell-mouthed.

[0009] In the above-mentioned online tuyere poking device after the blast furnace coal gun is modified, the other end of the quick connector is a gas connection end, and the poking chisel is a hollow structure with openings at both ends.

[0010] In the above-mentioned online tuyere poking device after the blast furnace coal gun is modified, the length of the open pipe is greater than the width of the gap between the straight pipe and the sealing ring.

[0011] The above-mentioned blast furnace coal gun is modified and the online tuyere poking device, the poking bar comprises a coal gun end and an extension end, the coal gun end and the extension end are connected by welding, the extension end is a thickened stainless steel round tube, and its diameter is the same as that of the coal gun end.

[0012] The beneficial effects of adopting the above technical solution are:

[0013] The utility model uses the balls in the ball valve to seal the high-temperature hot air leaking from the tuyere during the process of inserting and pulling the tuyere back and forth. At the same time, the ball valve is modified and a sealing member is provided inside the pipe mouth. When the poking rod is inserted and the ball enters the curved pipe end, the high-temperature hot air leaking from the tuyere is sealed by the sealing member, thereby providing double protection for the operator. The poking rod is a hollow structure with the tail end connected to the gas end. The gas ejected plays a cooling role to protect the poking rod and prevent the head end of the poking rod from turning red or even breaking. At the same time, the impact of the gas can also reduce the difficulty of the online poking tuyere operation of the blast furnace. After the tuyere is poked open, the ball valve can be replaced with the original peephole and the manual ball valve, and the utility model can continue to be used to poke open the remaining tuyere.

[0014] The utility model has the advantages of simple structure, safety and reliability, and can realize online poking of air vents without reducing wind and oxygen, thus simplifying the operation procedure, improving operation safety, and reducing the labor intensity of operators. Through production practice, better use effect has been achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the structure of the utility model (not drawn to scale);

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of part A of FIG. 1 (not drawn to scale);

[0018] Figure 3 The figure is a schematic diagram of the structure of the original tuyere cover (not drawn to scale).

[0019] In the figure: 1. quick connector; 2. poking chisel; 3. marble valve; 21. cross arm; 31. first straight pipe end; 32. bent pipe end; 33. second straight pipe end; 34. marble; 35. sealing element; 351. sealing ring; 352. spring; 353. wind shield; 354. straight pipe; 355. open pipe; 4. conversion joint; 5. air outlet cover body; 6. straight blowing pipe; 7. manual ball valve; 8. peephole. DETAILED DESCRIPTION

[0020] Example

[0021] like Figure 1 As shown, the utility model includes a quick connector 1, a poking rod 2 and a ball valve 3, wherein the quick connector 1 is connected to the poking rod 2, and the end of the poking rod 2 close to the quick connector 1 is the tail end, and two cross arms 21 are provided. When poking the air outlet, one person stands on each side of the poking rod, and by grasping the cross arm 21, the round brick or blister mud inside the air outlet is thrust back and forth to hit the poking rod. The cross arm 21 is welded to the poking rod 2, and the end of the poking rod 2 entering the straight blowing pipe 6 is the head end, and this end is in a pointed shape.

[0022] The ball valve 3 in the utility model comprises a first straight pipe end 31, a middle curved pipe end 32, a second straight pipe end 33, a ball 34 and a sealing member 35, wherein the ball 34 is located in the curved pipe end 32, and the pipe diameter of the curved pipe end 32 is larger than the pipe diameters of the first straight pipe end 31 and the second straight pipe end 33. When the poking drill 2 is inserted, the ball 34 enters the upper part of the curved pipe end 32, and when the poking drill 2 is pulled out, the ball 34 falls into the lower part of the curved pipe end 32, i.e., the part horizontal to the two straight pipe ends, so as to achieve blocking of high-temperature hot air leaking from the air outlet during the process of pulling and inserting the poking drill 2 back and forth.

[0023] In addition, in the utility model, the second straight pipe end 33 is threadedly connected to the conversion joint 4, the first straight pipe end 31 is connected to the inner part of the pipe mouth away from the bent pipe end with a seal 35, the first straight pipe end 31 and the seal 35 are connected by screws, the seal 35 includes a sealing ring 351, a spring 352 and a wind shield 353, two annular grooves are arranged inside the sealing ring 351, a plurality of springs 352 are evenly arranged in the annular grooves, the other end of the spring 352 is connected to the wind shield 353, when the poking rod 2 is inserted, the outer wall of the poking rod 2 is slidably connected to the wind shield 353, at this time the ball 34 in the ball valve Located at the upper part of the bent pipe end 32, the high-temperature hot air leaking from the air outlet is blocked by the sealing member 35. The wind shield ring 353 includes a straight tube 354 in the middle and open tubes 355 at both ends. The open tube 355 is a trumpet-shaped one. The length of the open tube 355 is greater than the length of the gap between the straight tube 354 of the wind shield ring and the sealing ring 351. The two ends of the wind shield ring 353 are set to be trumpet-shaped. On the one hand, it is convenient for the insertion of the poking dowel 2. On the other hand, it is used to block the gap between the straight tube 354 and the sealing ring 351, which can not only ensure that when the air outlet is poked open, the high-temperature hot air directly blown out from the air outlet is blocked, but also balance the pressure on both sides of the seal.

[0024] like Figure 1 As shown, the other end of the quick connector 1 of the utility model is a gas connection end, which can be used to connect nitrogen or coal powder gas source. The poking rod 2 is a hollow structure with openings at both ends, and gas can pass through the inside. Opening the nitrogen gas source while poking the air outlet can prevent the high temperature in the air outlet from turning red. At the same time, the impact of the gas can also reduce the difficulty of the poking operation.

[0025] In this embodiment, the poking drill 2 is a two-stage structure, including a coal gun end and an extension end. The coal gun end and the extension end are connected by welding. The extension end is a thickened stainless steel round tube with the same diameter as the coal gun end.

[0026] like Figure 1 As shown, the other end of the conversion joint 4 is connected to the tuyere cover body 5, and the tuyere cover body 5 is connected to the straight blowing pipe 6.

[0027] like Figure 2 As shown, it is the original tuyere cover on the blast furnace, and the tuyere cover includes a tuyere cover body 5, a manual ball valve 7 and a peephole 8. After the tuyere is opened, the ball valve 3 in the utility model can be removed and replaced with the manual ball valve 7 and the peephole 8. The replaced ball valve 3 can be reused to open the remaining tuyere, and the manual ball valve 7 and the peephole 8 can continue to be used to observe the internal working status of the blast furnace.

[0028] The steps to poke the vent are as follows:

[0029] 1. Remove the manual ball valve and peephole connected to the conversion joint before poking the air vent;

[0030] 2. Install the ball valve, connect the nitrogen gas source to the tail end of the poking rod with a quick connector, insert the poking rod through the middle of the seal in the ball valve into the air vent, and turn on the nitrogen gas source at the same time to prevent the high temperature in the air vent from causing the poking rod to turn red;

[0031] 3. After the poking drill is inserted into the air vent, two operators hold the crossbar and use impact to poke open the round bricks or blister mud blocking the air vent.

[0032] 4. After the air outlet is opened, pull out the poking pin and quickly replace the ball valve with a manual ball valve and peephole.

[0033] 5. If it is not completely opened, the nitrogen gas source of the drill can be changed to a coal powder gas source, and the coal powder gas source can be turned on and off intermittently. It can be flushed open in 1 to 2 minutes. At the same time, this method is effective in dealing with slag filling and slag hanging in the tuyere.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blast furnace coal gun modified online tuyere device, characterized by: The invention comprises a quick connector (1), a poking pin (2) and a ball valve (3), wherein the quick connector (1) is connected to the poking pin (2), the end of the poking pin (2) close to the quick connector (1) is the tail end and is provided with two cross arms (21), the cross arms (21) are welded to the poking pin, and the end of the poking pin (2) entering the straight blow pipe (6) is the head end; the ball valve comprises (3) a first straight pipe end (31), a middle curved pipe end (32), a second straight pipe end (33), a ball (34) and a sealing member (35), wherein the ball (34) is located in the curved pipe end (32), and the curved pipe end (32) is provided with a sealing member (35). The pipe diameter is larger than the pipe diameters of the first straight pipe end (31) and the second straight pipe end (33); the first straight pipe end (31) is internally connected to a sealing member (35), the sealing member (35) comprising a sealing ring (351), a spring (352) and a windshield ring (353); an annular groove is provided inside the sealing ring (351), a plurality of springs (352) are provided in the annular groove, the other end of the spring (352) is connected to the windshield ring (353), the windshield ring (353) comprises a straight pipe (354) in the middle and open pipes (355) at both ends, the open pipe (355) being of a bell-mouth type.

2. According to claim 1, the online tuyere-poking device after the blast furnace coal gun transformation is characterized in that: The other end of the quick connector (1) is a gas connection end, and the poking rod (2) is a hollow structure with openings at both ends.

3. The online tuyere-poking device after the blast furnace coal gun transformation according to claim 1 or 2 is characterized in that: The length of the open tube (355) is greater than the width of the gap between the straight tube (354) and the sealing ring (351).

4. The online tuyere-poking device after the blast furnace coal gun transformation according to claim 1 is characterized in that: The poking drill (2) comprises a coal gun end and an extension end, the coal gun end and the extension end are connected by welding, and the extension end is a thickened stainless steel round tube with the same diameter as the coal gun end.

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