Online repairing device for gooseneck pipe of blast furnace

Abstract

The utility model relates to the field of repairing of blast furnace equipment, in particular to an on-line repairing device for a gooseneck pipe of a blast furnace. The device comprises a base, walking wheels and a vertical support, the walking wheels and the vertical support are mounted on the base, a hydraulic lifting oil cylinder, a pulley and a groove-shaped mounting plate are mounted on the vertical support, one end of a chain is mounted on the groove-shaped mounting plate, an L-shaped support is mounted at the other end of the chain, a support plate at the bottom of the L-shaped support is far away from a chain vibrating rod insertion hole, and a motor is mounted on a pouring shell. The output end of the motor is connected with an electric push rod, a telescopic rod is installed at the front end of the electric push rod, and a piston is installed at the top end of the telescopic rod and matched with an inner hole of the pouring shell. The utility model has the following advantages: the device can realize on-line repair, is short in repair time, does not need baking, can be solidified by internal waste heat, can realize on-line repair, does not delay working hours, is convenient to operate, and saves time.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace equipment repair, and in particular to an online repair device for blast furnace gooseneck tubes and its repair process. Background Technology

[0002] Currently, the refractory material inside the gooseneck tube of the blast furnace is being eroded, detached, and cracked by the air velocity, causing the refractory material inside the gooseneck tube to become thinner and the external steel pipe to overheat. This directly affects the stable and smooth production of the blast furnace, and in severe cases, the hot blast may burn through, causing a major accident. In the past, the solution was to carry out a mid-term overhaul of the blast furnace (which involved a long shutdown time), cooling the furnace tubes, and removing and recasting the refractory material inside the gooseneck tube. This process was lengthy and caused significant economic losses to the owner.

[0003] According to the relevant content published on the website of the State Intellectual Property Office, CN 116179775 A discloses a grouting valve structure that relies on pressure to inject materials, which has very strict requirements and requires baking for 10 to 15 hours. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an online repair device for blast furnace goose neck tubes that is simple to operate and can shorten maintenance time.

[0005] The online repair device of this utility model adopts the following technical solution:

[0006] A blast furnace gooseneck tube online repair device includes a base, traveling wheels and a vertical support mounted on the base. The vertical support is equipped with a hydraulic lifting cylinder, pulleys and a grooved mounting plate. One end of a chain is mounted on the grooved mounting plate, and the other end of the chain is equipped with an L-shaped support. The bottom support plate of the L-shaped support is equipped with a vertical support at the other end away from the chain. A casting shell is mounted on the vertical support. A vibrator insertion hole is installed at the lower end of the casting shell. A motor is mounted on the casting shell. The output end of the motor is connected to an electric push rod. A telescopic rod is installed at the front end of the electric push rod. A piston is installed at the top end of the telescopic rod. The piston matches the inner hole of the casting shell.

[0007] The technical solution of the above-mentioned online repair device has the following advantages: it can realize online repair, the repair time is short, it does not require baking, it can solidify by relying on internal residual heat, it can realize online repair without delaying work hours, it is convenient to operate, and it saves time.

[0008] The preferred solution for the online repair device is:

[0009] The base is equipped with a walking wheel at the front end and a swivel wheel at the rear end.

[0010] The vertical support is equipped with guide wheels, which slide in conjunction with the L-shaped support.

[0011] The chain is in dynamic engagement with a pulley mounted on a vertical support.

[0012] The upper end of the vertical support is provided with a long slot, and a pin is embedded in the long slot. The pin is installed on the outer shell of the cast shell.

[0013] Inspection holes are provided on the cast shell.

[0014] When the cast shell, which is mounted on the support by a pin, is in a vertical position, it is set at the same height as the top of the vertical support.

[0015] The online repair process adopts the following technical solution:

[0016] Follow these steps:

[0017] S1. Determine the inner diameter of the gooseneck tube based on the blast furnace volume, and determine the specifications of the online repair device based on the diameter;

[0018] S2. Clean the surface of the detached and flushed parts of the gooseneck tube;

[0019] S3. Install a mold steel plate of the same specification as the gooseneck flange to prevent the casting material from flowing out;

[0020] S4. Move the online repair device below the blast furnace neck tube;

[0021] S5. Operate the electric push rod to retract the telescopic rod and retract the piston back to the starting point.

[0022] S6. Then pour the mixed refractory into the casting chamber of the online repair device;

[0023] S7. Operate the hydraulic lifting cylinder to raise the support;

[0024] S8. The support lifts the vertical support and the casting shell, and inserts the upper part of the casting chamber of the casting shell into the gooseneck tube.

[0025] S9. Then operate the electric push rod. The telescopic rod pushes the piston upward, pushing the pouring material in the pouring chamber out of the chamber. The pouring material flows into the repair area by its own weight.

[0026] S10. Then place the vibrator into the vibrator hole to allow the gas in the mortar to escape, and finally pour the shadow repair area completely.

[0027] S11. Operate the hydraulic lifting cylinder to lower the support bracket, so that the pouring chamber is separated from the gooseneck pipe; the repair is then complete.

[0028] The preferred solution for online repair technology is:

[0029] In step S3, a mold steel plate of the same specifications as the gooseneck flange, with a thickness of 10mm, is installed.

[0030] In step S8, the insertion depth of the casting chamber (19) of the casting shell (13) is determined based on the situation of refractory material falling off on site.

[0031] The technical solution of the repair process has the following advantages: it can realize online repair, the repair time is short, it does not require baking, it can solidify by relying on internal residual heat, it can realize online repair without delaying work time, it is convenient to operate, and it saves time. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the online repair device of this utility model.

[0033] Figure 2 This is a schematic diagram of the installation structure of the various components on the housing.

[0034] Figure 3 This is a schematic diagram of the goose neck tube structure to be repaired. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and the accompanying specification drawings:

[0036] An online repair device for blast furnace gooseneck tubes, see attached. Figure 1-2 The specific structure shown in the figure includes: base 1, traveling wheel 2, vertical support 3, hydraulic lifting cylinder 4, grooved mounting plate 5, pulley 6, chain 7, L-shaped support 8, vertical support 9, vibrator insertion hole 10, motor 11, electric push rod 12, casting shell 13, inspection hole 14, piston 15, long slot hole 16, telescopic rod 17, reinforcing rib 18, casting chamber 19, caster wheel 20, guide wheel 21; Figure 3 In the middle, flange 22.

[0037] In this embodiment, an online repair device for blast furnace gooseneck tubes includes a base 1, a traveling wheel 2 and a vertical support 3 mounted on the base 1. The vertical support 3 is equipped with a hydraulic lifting cylinder 4, a pulley 6 and a grooved mounting plate 5. One end of a chain 7 is mounted on the grooved mounting plate 5, and the other end of the chain 7 is equipped with an L-shaped support 8. The other end of the bottom support plate of the L-shaped support 8, away from the chain 7, is equipped with a vertical support 9. A casting shell is mounted on the vertical support 9. The lower end of the casting shell 13 is equipped with a vibrator insertion hole 10. A motor 11 is mounted on the casting shell 13 above the vibrator insertion hole 10. The output end of the motor 11 is connected to an electric push rod 12. The front end of the electric push rod 12 is equipped with a telescopic rod 17, and the top end of the telescopic rod 17 is equipped with a piston 15. The piston 15 matches the inner hole of the casting shell 13.

[0038] When the cast shell 13, which is mounted on the bracket 9 by a pin, is in a vertical position, it is set at the same height as the top of the vertical bracket 3.

[0039] Two vertical supports 3 are set at the same height and are placed on both sides of the cast shell 13; a reinforcing rib 18 is added between the vertical support 3 and the base 1; the front end of the base 1 is equipped with a traveling wheel 2, and the rear end of the base 1 is equipped with a universal wheel 20 through a mounting bracket; a guide wheel 21 is installed on the vertical support 3, and the guide wheel 21 slides with the L-shaped support 8; the chain 7 moves with the pulley 6 installed on the vertical support 3.

[0040] The upper end of the vertical support 9 is provided with a long slot 16, and a pin is embedded in the long slot 16. The pin is mounted on the outer shell of the casting shell 13. Two symmetrically arranged inspection holes 14 are provided on the casting shell 13.

[0041] The specific repair process using this device shall be carried out according to the following steps:

[0042] S1. Determine the inner diameter of the gooseneck tube based on the blast furnace volume, and determine the specifications of the online repair device based on the diameter. This embodiment uses a blast furnace with a diameter of 300 mm and a volume of 2000 cubic meters as an example. A gooseneck tube casting repair device is selected: 300 mm in diameter and 1.85 m in length; the drive uses an electric push rod 12 and a 0.75 kW motor 11; the telescopic length is 0-600 mm. The hydraulic lifting cylinder 4 has a lifting height of 1.2 meters. Figure 1-2 As shown: Refer to Figure 3 The diagram shows the gooseneck tube to be repaired.

[0043] S2. Clean the surface of the detached and eroded parts of the gooseneck tube (long-term use of the blast furnace will cause the internal refractory material to fall off and become thinner due to erosion). Figure 3 (The black-lined areas and shaded areas are used to represent this).

[0044] S3. Install a mold steel plate of the same specifications as the gooseneck flange 22. The mold steel plate is 10mm thick to prevent the casting material from flowing out.

[0045] S4. Move the online repair device below the blast furnace neck tube.

[0046] S5. Operate the electric push rod 12 to retract the telescopic rod 17 and retract the piston 15 back to the starting point.

[0047] S6. Then pour the mixed refractory into the casting chamber 19 of the online repair device.

[0048] S7. Operate the hydraulic lifting cylinder 4 to raise the L-shaped support 8.

[0049] S8 and L-shaped supports 8 lift the vertical support 9 and the cast shell 13, inserting the upper part of the casting chamber 19 of the shell 13 into the gooseneck tube; the insertion depth of the casting chamber 19 of the shell 13 is calculated and determined based on the refractory material detachment situation on site. Cast shell 13: Material: Q235; Thickness: 6mm.

[0050] S9. Then operate the electric push rod 12 and the telescopic rod 17 to push the piston 15 upward, pushing the casting material in the casting chamber 19 out of the chamber opening. The casting material flows into the repair area by its own weight (the flange openings of all blast furnace gooseneck tubes are downward, so they flow in by their own weight).

[0051] S10. Then insert the vibrator into the vibrator hole 10 to allow the gas in the pouring material to escape, and finally pour the shadow repair area completely.

[0052] S11. Operate the hydraulic lifting cylinder to lower the L-shaped support 8, so that the pouring chamber 19 is separated from the gooseneck pipe; the repair is then completed.

[0053] When using the online hot repair device and process in this embodiment for construction, there is no need for baking; solidification can be achieved by relying on internal residual heat. The total operation time is approximately 5-6 hours, which saves time.

[0054] This utility model is not limited to the structural features exemplified in the above embodiments. Any equivalent substitutions made accordingly are considered to be within the protection scope of this utility model.

Claims

1. An online repair device for a blast furnace gooseneck, comprising a base (1), a walking wheel (2) and a vertical support (3) mounted on the base (1), a hydraulic lifting cylinder (4), a pulley (6) and a grooved mounting plate (5) mounted on the vertical support (3), one end of a chain (7) mounted on the grooved mounting plate (5), the other end of the chain (7) mounted on an L-shaped support (8), the other end of the bottom support plate of the L-shaped support (8) away from the chain (7) mounted on a vertical support (9), a casting shell (13) mounted on the vertical support (9), a vibrating rod insertion hole (10) mounted at the lower end of the casting shell (13), a motor (11) mounted on the casting shell (13), an output end of the motor (11) connected to an electric push rod (12), a telescopic rod (17) mounted at the front end of the electric push rod (12), a piston (15) mounted at the top end of the telescopic rod (17), and the piston (15) matching the inner hole of the casting shell (13).

2. The blast furnace gooseneck online repair device according to claim 1 is characterized in that: The front end of the base is provided with a running wheel (2), and the rear end of the base is provided with a universal wheel (20).

3. The blast furnace gooseneck online repair device according to claim 1 is characterized in that: The vertical support (3) is provided with a guide wheel (21), and the guide wheel (21) is slidably matched with the L-shaped support (8).

4. The blast furnace gooseneck online repair device according to claim 1 is characterized in that: The chain (7) is in dynamic cooperation with a pulley mounted on the vertical support (3).

5. The blast furnace gooseneck online repair device according to claim 1 is characterized in that: The upper end of the vertical support (9) is provided with a long slot hole (16), a pin is embedded in the long slot hole (16), and the pin is mounted on the outer shell of the casting shell (13).

6. The blast furnace gooseneck online repair device according to claim 1 is characterized in that: An inspection hole (14) is provided on the casting shell (13).

7. The blast furnace gooseneck online repair device according to claim 5 is characterized in that: The casting shell (13) mounted on the vertical support (9) via a pin is arranged at the same height as the top of the vertical support (3) when in a vertical state.

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