Auxiliary device for replacing blast furnace spray pipe and spray pipe replacement method

Abstract

The present invention discloses an auxiliary device for a blast furnace spray pipe and a method for replacing the spray pipe, and relates to the field of blast furnace cleaning system maintenance, comprising a first column and a second column arranged on both sides of the blast furnace, two parallel first and second hanging beams are connected between the first and second columns, the first hanging beam is located directly above the spray pipe, a first electric hoist is installed on the first hanging beam, a tray is suspended at the bottom of the first electric hoist, a motor is installed on the tray, a rotating shaft of the motor is arranged directly opposite to the spray pipe, an axially aligned pull rod is arranged at the front end of the rotating shaft, and a flange that can be connected to the spray pipe is arranged at one end of the pull rod facing the spray pipe; the second hanging beam corresponds to the outer side of the spray pipe body, a second electric hoist is installed on the second hanging beam, and a working safety platform for manual operation is suspended at the bottom of the second electric hoist. The present invention realizes fast and safe replacement of the spray pipe through the above-mentioned auxiliary replacement device.

Description

Technical Field

[0001] The invention relates to the field of blast furnace cleaning system and maintenance, and in particular to an auxiliary device for replacing a blast furnace spray pipe and a method for replacing the spray pipe. Background Art

[0002] The blast furnace is referred to as the DAVY tower. Replacing the nozzles on the tower involves multiple dangerous operations such as climbing, confined space, and gas. The blast furnace gas cleaning system cools and dusts the byproduct gas produced by the blast furnace. The scouring of the gas causes the nozzles to wear quickly, reducing the dust removal effect and bringing many subsequent problems. The environment inside the DAVY tower is relatively harsh, high altitude, confined, and gas, which increases the difficulty of replacement. In the original technology, personnel need to enter the tower to replace the spray pipe and use a ladder to operate, which increases the risk factor. There are 10 nozzles and a height difference of 20 meters. There are lumps on the inner wall of the tower, which sometimes cause smashing accidents. The nozzles of the blast furnace DAVY tower cannot be maintained and inspected online during normal production, and can only be handled when the blast furnace is shut down. Therefore, it is a problem that needs to be solved at present to design an auxiliary replacement device that does not require personnel to climb and can replace the spray pipe very quickly and safely. Summary of the invention

[0003] In view of the above problems, the present invention provides an auxiliary device for replacing a blast furnace spray pipe and a method for replacing the spray pipe. The specific scheme is as follows:

[0004] The auxiliary device for replacing a blast furnace spray pipe is used to disassemble a plurality of spray pipes arranged on the side of the blast furnace, the plurality of spray pipes are arranged flush up and down, one end of the spray pipe is connected to the blast furnace through a first end flange, the other end of the spray pipe extends horizontally to the outside of the blast furnace, and the end of the spray pipe extending out of the blast furnace is provided with a second end flange. The auxiliary device comprises a first column and a second column arranged on both sides of the blast furnace, two parallel first hanging beams and a second hanging beam are connected between the first column and the second column, the first hanging beam is located directly above the spray pipe, a first electric hoist is installed on the first hanging beam, a tray is suspended at the bottom of the first electric hoist, a motor is installed on the tray, a rotating shaft of the motor is arranged directly opposite to the second end flange of the spray pipe, an axially aligned pull rod is arranged at the front end of the rotating shaft, the rotating shaft and the pull rod are fixedly connected by a flange, and a third end flange that can be connected to the second end flange of the spray pipe is provided at one end of the pull rod facing the spray pipe; the second hanging beam corresponds to the outer position of the spray pipe body, a second electric hoist is installed on the second hanging beam, and a working safety platform for manual operation is suspended at the bottom of the second electric hoist.

[0005] Furthermore, the second column is located on the side facing the second end flange, and a lifting mechanism is provided in the second column, and a pressure block and a power supply are provided in the lifting mechanism. A wire rope electric winch is provided on the rear side of the motor, and the rope in the electric winch is composed of a wire rope and an electric wire intertwined with each other, and the rope is connected to the pressure block. The electric wire is located at the pressure block and is separated from the rope and connected to the power supply. The electric wire is located at one end of the electric winch and is separated from the rope and connected to the motor.

[0006] Furthermore, a first supporting hook for supporting the spray pipe is provided at the bottom of each spray pipe, and the first supporting hook is fixedly connected to the blast furnace.

[0007] Furthermore, the motor is a servo motor.

[0008] Furthermore, a spare spray pipe for replacement is hoisted at the bottom of the tray, and a second supporting hook for supporting the spray pipe is provided on the side of the working safety platform facing the blast furnace.

[0009] Further, a method for replacing a spray pipe, the specific steps are as follows:

[0010] Step 1, respectively controlling the first electric hoist and the second electric hoist to make the pallet and the work safety platform flush with the same height of the spray pipe to be removed, and at the same time, the lifting mechanism is adjusted synchronously with the height of the first electric hoist to keep the lifting mechanism flush with the pallet;

[0011] Step 2, controlling the second electric hoist to move to the first end flange position of the spray pipe, and the staff releases the connection between the first end flange and the blast furnace;

[0012] Step 3, after completing the previous step, control the second electric hoist to move to the second end flange position of the spray pipe, and control the first electric hoist to move to the second end flange position at the same time, and the staff docks the third end flange of the pull rod end with the second end flange of the spray pipe. During the movement of the first electric hoist, control the electric winch to release the rope so that the length of the rope matches the distance between the first electric hoist and the second column;

[0013] Step 4, control the motor to rotate 90° clockwise, and the motor shaft drives the first end flange of the spray pipe to rotate 90° upward;

[0014] Step 5, control the second electric hoist to move to the tray, control the lifting rope of the second electric hoist to descend, so that the working safety platform is lowered to the same height as the spare spray pipe, the staff pulls the spare spray pipe into the supporting hook, and releases the connection between the spare spray pipe and the bottom of the tray;

[0015] Step 6, control the first electric hoist to move away from the blast furnace, drive the spray pipe to leave the blast furnace, and control the electric winch to retract the rope so that the length of the rope matches the distance between the first electric hoist and the second column;

[0016] Step 7, control the lifting rope of the second electric hoist to rise the height of the original spray pipe, then control the second electric hoist to move to the supporting hook of the original spray pipe, install the spare spray pipe on the supporting hook, and fix the first end flange of the spare spray pipe to the blast furnace.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] 1. The present invention realizes rapid replacement of the spray pipe through the auxiliary replacement device.

[0019] 2. The present invention does not require workers to climb and replace, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 A side view of a safety platform for work.

[0022] Reference numerals:

[0023] 1. Spray pipe; 2. Blast furnace; 3. First end flange; 4. Second end flange; 5. First column; 6. Second column; 7. First hanging beam; 8. Second hanging beam; 9. First electric hoist; 10. Second electric hoist; 11. Pallet; 12. Motor; 13. Pull rod; 131. Pull rod support; 132. Bearing; 14. Third end flange; 15. Work safety platform; 16. Lifting mechanism; 17. Press block; 18. Power supply; 19. Wire rope electric winch; 20. First support hook; 21. Second support hook; 22. Twisted rope; 23. Electric wire; 24. Spare spray pipe. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, an auxiliary device for replacing the spray pipe 1 of a blast furnace 2 is used to disassemble a plurality of spray pipes 1 arranged on the side of the blast furnace 2. The plurality of spray pipes 1 are arranged flush with each other up and down. A first supporting hook 20 for supporting the spray pipe 1 is provided at the bottom of each spray pipe 1. The first supporting hook 20 is fixedly connected to the blast furnace 2. One end of the spray pipe 1 is connected to the blast furnace 2 through a first end flange 3. The other end of the spray pipe 1 extends horizontally to the outside of the blast furnace 2. A second end flange 4 is provided at the end of the spray pipe 1 extending out of the blast furnace 2. The auxiliary device comprises a first column 5 and a second column 6 arranged on both sides of the blast furnace 2. Two first hanging beams 7 and a second hanging beam 8 arranged in parallel are connected between the first column 5 and the second column 6. The first hanging beam 7 is located directly above the spray pipe 1. A first electric hoist 9 is installed on the first hanging beam 7. A tray 11 is suspended at the bottom of the first electric hoist, and a motor 12 is installed on the tray 11. The rotating shaft of the motor 12 is arranged opposite to the second end flange 4 of the spray pipe 1, and an axially aligned pull rod 13 is arranged at the front end of the rotating shaft. The rotating shaft and the pull rod 13 are fixedly connected by a flange. A pull rod support 131 is arranged at the middle position of the tray 11, and a bearing 132 is sleeved on the outside of the pull rod 13 at the top of the pull rod support 131. The end of the pull rod 13 facing the spray pipe 1 is provided with a third end flange 14 which can be connected with the second end flange 4 of the spray pipe 1. A spare spray pipe 1 for replacement is hoisted at the bottom of the tray 11, and a second supporting hook 21 for supporting the spray pipe 1 is provided on the side of the working safety platform 15 facing the blast furnace 2, and the second column 6 is located on the side opposite to the second end flange 4.

[0030] The second column 6 is provided with a lifting mechanism 16, which is a lifting platform suspended by an electric hoist fixed on the top of the second column. The lifting platform is provided with a pressure block 17 and a power supply 18, and the power supply is a battery. A steel wire electric winch 19 is provided at the rear side of the motor 12. The rope 22 in the electric winch is composed of a steel wire rope and an electric wire 23 intertwined with each other. The rope 22 is connected with the pressure block 17. The pressure block 17 can ensure the balance of the tray 11 after the pull rod 13 is connected to the spray pipe 1. The connection between the rope 22 and the pressure block 17 can ensure that the tray 11 will not tilt too much to the side connected to the spray pipe 1; the electric wire 23 is located at the pressure block 17 and is separated from the rope 22 and connected to the power supply 18. The electric wire 23 is located at one end of the electric winch and is separated from the rope 22 and connected to the motor 12. The motor 12 is a servo motor 12; the second hanging beam 8 corresponds to the outer side of the spray pipe 1, and a second electric hoist 10 is installed on the second hanging beam 8. A working safety platform 15 for manual operation is suspended at the bottom of the second electric hoist 10.

[0031] The first electric hoist 9, the second electric hoist 10, the lifting mechanism 16, the electric winch and the motor 12 are all electrically connected to the PLC main control board, and also include a remote terminal for controlling the PLC main control board. Construction personnel control the above mechanisms through the remote terminal to assist in the operation.

[0032] Example 2

[0033] A method for replacing the spray pipe 1 based on the above solution comprises the following steps:

[0034] Step 1, respectively controlling the first electric hoist 9 and the second electric hoist 10 to make the tray 11 and the work safety platform 15 flush with the same height of the spray pipe 1 to be removed, and at the same time, the lifting mechanism 16 is adjusted synchronously with the height of the first electric hoist 9 to keep the lifting mechanism 16 flush with the tray 11;

[0035] Step 2, controlling the second electric hoist to move to the position of the first end flange 3 of the spray pipe 1, and the staff releases the connection between the first end flange 3 and the blast furnace 2;

[0036] Step 3, after completing the previous step, control the second electric hoist to move to the second end flange 4 position of the spray pipe 1, and control the first electric hoist 9 to move to the second end flange 4 position, and the staff docks the third end flange 14 of the pull rod 13 with the second end flange 4 of the spray pipe 1. During the movement of the first electric hoist 9, control the rope 22 of the electric winch to release the rope 22, so that the length of the rope 22 matches the distance between the first electric hoist 9 and the second column 6;

[0037] Step 4, control the motor 12 to rotate 90° clockwise, and the rotating shaft of the motor 12 drives the first end flange 3 of the spray pipe 1 to rotate 90° upward;

[0038] Step 5, control the second electric hoist 10 to move to the tray 11, control the lifting rope of the second electric hoist 10 to descend, so that the working safety platform 15 is lowered to the same height as the spare spray pipe 1, and the staff pulls the spare spray pipe 1 into the supporting hook and releases the connection between the spare spray pipe 1 and the bottom of the tray 11;

[0039] Step 6, control the first electric hoist 9 to move away from the blast furnace 2, drive the spray pipe 1 to leave the blast furnace 2, and control the electric winch to retract the rope 22 so that the length of the rope 22 matches the distance between the first electric hoist 9 and the second column 6;

[0040] Step 7, control the lifting rope of the second electric hoist 10 to rise the height of the original spray pipe 1, then control the second electric hoist 10 to move to the supporting hook for lifting the original spray pipe 1, install the spare spray pipe 1 on the supporting hook, and fix the first end flange 3 of the spare spray pipe 1 to the blast furnace 2.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary device for replacing a blast furnace spray pipe, used for disassembling a plurality of spray pipes arranged on the side of a blast furnace, wherein the plurality of spray pipes are arranged flush with each other, one end of the spray pipe is connected to the blast furnace through a first end flange, and the other end of the spray pipe extends horizontally to the outside of the blast furnace, and a second end flange is provided at the end of the spray pipe extending out of the blast furnace, characterized in that: The auxiliary device includes a first column and a second column arranged on both sides of the blast furnace, two parallel first and second hanging beams are connected between the first column and the second column, the first hanging beam is located directly above the spray pipe, a first electric hoist is installed on the first hanging beam, a tray is hung at the bottom of the first electric hoist, a motor is installed on the tray, a rotating shaft of the motor is arranged directly opposite to the second end flange of the spray pipe, an axially aligned pull rod is arranged at the front end of the rotating shaft, the rotating shaft and the pull rod are fixedly connected by a flange, and a third end flange that can be connected to the second end flange of the spray pipe is arranged at one end of the pull rod facing the spray pipe; the second hanging beam corresponds to the outer side of the spray pipe body, a second electric hoist is installed on the second hanging beam, a working safety platform for manual operation is hung at the bottom of the second electric hoist, a first supporting hook for supporting the spray pipe is provided at the bottom of each spray pipe, the first supporting hook is fixedly connected to the blast furnace, a spare spray pipe for replacement is suspended at the bottom of the tray, and a second supporting hook for supporting the spray pipe is provided on the side of the working safety platform facing the blast furnace.

2. The auxiliary device for replacing a blast furnace spray pipe according to claim 1, characterized in that: The second column is located on the side facing the second end flange, and a lifting mechanism is arranged in the second column, and a pressure block and a power supply are arranged in the lifting mechanism. A wire rope electric winch is arranged on the rear side of the motor, and the rope in the electric winch is composed of a wire rope and an electric wire intertwined with each other, and the rope is connected to the pressure block. The electric wire is located at the pressure block and is separated from the rope and connected to the power supply. The electric wire is located at one end of the electric winch and is separated from the rope and connected to the motor.

3. The auxiliary device for replacing a blast furnace spray pipe according to claim 1, characterized in that: The motor is a servo motor.

4. A method for replacing a spray pipe of an auxiliary device for replacing a blast furnace spray pipe according to claim 1, characterized in that: The steps include: Step 1, respectively controlling the first electric hoist and the second electric hoist to make the pallet and the work safety platform flush with the same height of the spray pipe to be removed, and at the same time, the lifting mechanism is adjusted synchronously with the height of the first electric hoist to keep the lifting mechanism flush with the pallet; Step 2, controlling the second electric hoist to move to the first end flange position of the spray pipe, and the staff releases the connection between the first end flange and the blast furnace; Step 3, after completing the previous step, control the second electric hoist to move to the second end flange position of the spray pipe, and control the first electric hoist to move to the second end flange position at the same time, and the staff docks the third end flange of the pull rod end with the second end flange of the spray pipe. During the movement of the first electric hoist, control the electric winch to release the rope so that the length of the rope matches the distance between the first electric hoist and the second column; Step 4, control the motor to rotate 90° clockwise, and the motor shaft drives the first end flange of the spray pipe to rotate 90° upward; Step 5: Control the second electric hoist to move to the tray, control the lifting rope of the second electric hoist to descend, so that the working safety platform is lowered to the same height as the spare spray pipe, the staff pulls the spare spray pipe into the supporting hook, and releases the connection between the spare spray pipe and the bottom of the tray; Step 6, control the first electric hoist to move away from the blast furnace, drive the spray pipe to leave the blast furnace, and control the electric winch to retract the rope so that the length of the rope matches the distance between the first electric hoist and the second column; Step 7, control the lifting rope of the second electric hoist to rise the height of the original spray pipe, then control the second electric hoist to move to the supporting hook of the original spray pipe, install the spare spray pipe on the supporting hook, and fix the first end flange of the spare spray pipe to the blast furnace.

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