Lifting device for A cover of blast furnace

Abstract

The utility model relates to the field of blast furnace ironmaking, in particular to a blast furnace cover A lifting device which comprises two identical trapezoidal steel plates, hook heads are welded on one sides of the upper bottoms of the trapezoidal steel plates, the hook heads of the two trapezoidal steel plates are in butt joint according to an inner included angle of 15-30 degrees and are welded and fixed, holes are formed in the positions 200 mm away from the lower bottom edges of the trapezoidal steel plates and 50 mm away from the side edges of the trapezoidal steel plates, and holes are formed in the positions 150 mm away from the lower right portions of the holes by 45 degrees. Corresponding holes in the two trapezoidal steel plates are welded and reinforced through round steel, the upper round steel serves as a cap moving machine hook, the lower round steel serves as a cap moving machine hook supporting point, and supporting plates are welded to the outer sides of the round steel between the two trapezoidal steel plates at intervals. The device is simple in structure and can be manufactured according to actual conditions, supporting points can be adjusted, the deviated or fallen A cover can be rapidly hung out, and the accidents that equipment is burnt out and molten iron overflows are avoided.

Description

Technical Field

[0001] The utility model relates to the field of blast furnace ironmaking, and in particular to a blast furnace A cover lifting device. Background Art

[0002] During the blast furnace production process, in order to avoid high-temperature heat radiation, iron discharge smoke and slag splashing, a trench cover is placed above the main trench of the blast furnace. The trench covers are divided into A, C, and D covers according to the length of the main trench of each blast furnace and the different needs. Among them, the A cover is located closest to the iron mouth. Before the iron mouth is blocked, the cover moving machine needs to be operated to lift the A cover from above the main trench and place it on one side of the main trench, and the hydraulic gun is used to block the mouth. During normal production, when the A cover is placed on the main trench, due to the different locations or degrees of erosion of the refractory material in the A cover and the different heights of the main trench sides, the A cover may move, deflect, or shake, unhook, or fall during the hanging process of the cover moving machine. The cover moving machine cannot hang out or remove the A cover, and the hydraulic gun cannot block the mouth, which can easily cause equipment burns and molten iron overflow accidents, leading to wind and production suspension. Utility Model Content

[0003] The utility model aims to provide a blast furnace A cover lifting device to solve the problem that the A cover shakes, dehooks and falls during the hanging process of the cover removal machine, the cover removal machine cannot hang out or remove the A cover, and the hydraulic gun cannot block the mouth, which easily causes equipment burning and molten iron overflow accidents leading to wind stoppage and production suspension.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A blast furnace A cover lifting device comprises a trapezoidal steel plate, wherein there are two trapezoidal steel plates, and the two trapezoidal steel plates are identical, a hook is welded on one side of the upper bottom of the trapezoidal steel plate, the hooks of the two trapezoidal steel plates are butt-jointed and welded at an internal angle of 15°-30°, a hole is provided 200mm from the lower bottom edge of the trapezoidal steel plate and 50mm from the side, the hole is inclined 45° to the lower right and a hole is provided 150mm away from the hole, the corresponding holes on the two trapezoidal steel plates are welded and reinforced by round steel, the upper round steel is the hook of the cover moving machine, and the lower round steel is the support point of the hook of the cover moving machine.

[0006] A support plate is welded at intervals outside the round steel between the two trapezoidal steel plates.

[0007] The upper side length of the trapezoidal steel plate is 100mm-150mm, the lower side length is 300mm-350mm, and the height is 450mm-500mm.

[0008] The support plate is a 5mm thick rectangular steel plate, which serves as a reinforcement.

[0009] There are 4 support plates.

[0010] The length of the support plate is 60mm-100mm.

[0011] Beneficial effects achieved by the utility model:

[0012] (1) The device has a simple structure and is easy to manufacture. It can be made with on-site materials according to actual conditions, and the cost is low;

[0013] (2) Since the outer angle spacing of the device is larger than the width of the capping machine hook, it can swing left and right. When the A cap is offset, the position and angle of the device are adjusted according to the offset direction. It is easy to use and can quickly hang out the offset or fallen A cap to avoid equipment burning and molten iron overflow accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Explanation of the accompanying drawings: 1. Trapezoidal steel plate; 2. Hook; 3. Round steel; 4. Support plate. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Measure the hook width of the cover transfer machine: 120mm, thickness: 100mm.

[0018] Purpose of measurement: Ensure that the lifting device can be hung in the hook of the cover transfer machine and can be adjusted. The bottom angle width of the lifting device should be greater than 120mm, and the width between the two round steels should be greater than the thickness of the cover transfer machine hook by 100mm. Select a 20mm thick steel plate and cut it into two pieces according to the trapezoidal structure with an upper width of 100mm, a lower width of 350mm, and a height of 450mm.

[0019] like Figure 1 As shown, a blast furnace A cover lifting device comprises two trapezoidal steel plates 1, the two trapezoidal steel plates 1 are identical, a hook head 2 is welded on one side of the upper bottom of the trapezoidal steel plate 1, the hook heads 2 of the two trapezoidal steel plates are butt-jointed and welded at an inner angle of 20°, a 65mm diameter hole is set at 50mm from the side 200mm away from the lower bottom edge of the trapezoidal steel plate 1, the hole is inclined 45° to the lower right, and a 65mm diameter hole is set at 150mm away from the hole, the corresponding holes on the two trapezoidal steel plates are welded and reinforced by round steel 3, the upper round steel is the hook of the cover moving machine, the lower round steel is the support point of the cover moving machine, and the round steel 3 is the support point of the cover moving machine. The diameter of steel 3 is 60mm; support plates 4 are welded on the outer sides of round steel 3 between two trapezoidal steel plates 1, with an interval of 100mm between support plates 4, and the length of support plates is 60mm-100mm; when the deflected or fallen A cover cannot be removed, a device suitable for extending the hook of the cover moving machine is designed to quickly lift the A cover to prevent equipment burning and molten iron overflow accidents that lead to wind shutdown; the round steel is used as a support point, and the position of the support point can be adjusted according to actual conditions. It is flexible and convenient to use, and the support plate is reinforced and welded to stabilize the structure and prevent deformation of the device.

[0020] Usage process: When cover A deflects or falls and cannot be removed with the hook, return the cover transfer machine to the starting position, install the utility model device, hang the cover transfer machine hook on the upper round steel, measure the extended part, and the measured data value: extend 450mm, reduce 200mm in height, and offset 100mm to the outside, which meets the requirements of the on-site data. The hook and lifting device enter the working area, and adjust the position of the device according to the deflection situation to quickly lift cover A. (The extended part refers to the length from the cover transfer machine hook to the hook head of the utility model device. The extension, reduction and offset distance are the actual maximum offset distance and sinking distance of cover A)

[0021] After using this device, it can avoid the overflow of slag and iron when the A cover is deflected and cannot be hung out, causing equipment burning and personnel burn accidents, and reduce the production loss caused by wind stoppage. Reducing the wind or stopping the wind can reduce the production of 400 tons of molten iron at a time.

Claims

1. A blast furnace A cover lifting device, characterized in that: It comprises a trapezoidal steel plate (1), wherein there are two trapezoidal steel plates (1), and the two trapezoidal steel plates (1) are identical, a hook head (2) is welded on one side of the upper bottom of the trapezoidal steel plate (1), the hook heads (2) of the two trapezoidal steel plates (1) are butt-jointed at an internal angle of 15°-30° and welded and fixed, a hole is provided 200 mm from the lower bottom edge of the trapezoidal steel plate (1) and 50 mm from the side edge, the hole is inclined 45° to the lower right and a hole is provided 150 mm from the hole, the corresponding holes on the two trapezoidal steel plates (1) are welded and reinforced by round steel (3), the upper round steel is the hook position of the cover transfer machine, and the lower round steel is the support point of the hook of the cover transfer machine.

2. A blast furnace A cover lifting device according to claim 1, characterized in that: A support plate (4) is welded between the two trapezoidal steel plates (1) on the outer sides of the round steel (3).

3. A blast furnace A cover lifting device according to claim 2, characterized in that: The trapezoidal steel plate (1) has an upper side length of 100 mm to 150 mm, a lower side length of 300 mm to 350 mm, and a height of 450 mm to 500 mm.

4. A blast furnace A cover lifting device according to claim 3, characterized in that: The support plate (4) is a 5 mm thick rectangular steel plate.

5. A blast furnace A cover lifting device according to claim 4, characterized in that: There are four support plates (4).

6. A blast furnace A cover lifting device according to claim 5, characterized in that: The support plate (4) has a length of 60 mm to 100 mm.

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