Converter body sleeve device

Abstract

The utility model relates to the technical field of ferrous metallurgical equipment, and particularly discloses a converter body sleeve device which comprises an oil pipe, a sleeve and a sleeve support, the oil pipe is installed on a converter body knocking-over ring through the sleeve support, the sleeve is sleeved outside the oil pipe, the sleeve comprises a middle sleeve and an outer sleeve, the middle sleeve is sleeved outside the oil pipe in a sealing mode, and the outer sleeve is sleeved outside the middle sleeve. At least two supporting block sets are fixedly connected between the middle casing pipe and the oil pipe, the middle casing pipe is fixedly sleeved with the outer casing pipe, the outer casing pipe is located on the outer side of the middle casing pipe at the supporting block sets, and two pipe connecting heads are arranged on the middle casing pipe. The sleeve device for the converter body ensures that hydraulic oil for the converter residual oil blocking cylinder is not directly baked by the high-temperature converter body, so that the temperature of the hydraulic oil is reduced, the impact of the hydraulic oil on the residual oil blocking cylinder is reduced, and the service life of the hydraulic cylinder is prolonged. The device has the advantages of low manufacturing cost, small occupied space, convenience in installation and use and good application effect.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgical equipment technology, specifically to a converter furnace body sleeve device. Background Technology

[0002] The slag-blocking sliding plate at the tapping spout of a steelmaking converter effectively controls the amount of slag discharged during tapping, reduces molten steel backflow, and lowers the oxidizing properties of the top slag. Hydraulic cylinder control is a crucial method for slag blocking using this sliding plate. The hydraulic lines exit from the trunnion on the east side of the converter, travel along the high-temperature converter body to the slag-blocking cylinder on the sliding plate, thus delivering the hydraulic fluid. However, due to their proximity to the furnace body, the inlet and return oil pipes are subjected to high-temperature radiation corrosion, resulting in a significant increase in oil temperature. This makes the oil pipes, slag-blocking cylinder, and other hydraulic components prone to leakage, leading to a short service life. Furthermore, to ensure effective slag blocking at the tapping spout, the slag-blocking cylinder operates rapidly, requiring high oil pressure (approximately 20 MPa). This causes the oil pipes and the cylinder body to frequently experience significant hydraulic shocks, further shortening their service life. These factors make the inlet and return oil pipes of the cylinder prone to leakage, potentially leading to fires on the furnace body, affecting the slag blocking function of the tapping spout, and increasing the risk of safety accidents. Therefore, it is necessary to design a converter furnace body sleeve device to solve the problem of short service life and safety hazards caused by the high temperature radiation corrosion of the existing oil inlet and return pipes. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide a converter furnace body sleeve device, which achieves the following: firstly, water cooling to reduce the temperature drop of the oil inlet and outlet of the slag-blocking cylinder at the converter tapping spout; and secondly, the design and installation of an arc-shaped anti-impact pipe to reduce the impact on the slag-blocking cylinder at the sliding plate and improve the online service life of the oil pipe and cylinder.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a converter furnace body sleeve device, including an oil pipe, a sleeve and a sleeve support. The oil pipe is installed on the furnace body through the sleeve support. The sleeve is sleeved on the outside of the oil pipe. The sleeve includes a middle sleeve and an outer sleeve. The middle sleeve is sealed and sleeved on the outside of the oil pipe. At least two sets of support block groups are fixedly connected between the middle sleeve and the oil pipe. The outer sleeve is fixedly sleeved on the outside of the middle sleeve. The outer sleeve is located outside the middle sleeve at the support block group. Two connecting pipe heads are provided on the middle sleeve.

[0005] Specifically, the oil pipe is arc-shaped, and the curvature of the oil pipe is consistent with the curvature of the furnace body. The oil pipe includes an oil inlet pipe and an oil return pipe, and both the oil inlet pipe and the oil return pipe are fitted with an inner sleeve.

[0006] Specifically, the intermediate sleeve is arc-shaped, and the arc of the intermediate sleeve is consistent with the arc of the oil pipe. The length of the intermediate sleeve is 80-100mm shorter at both ends of the oil pipe. The oil pipe is sealed and welded to both ends of the intermediate sleeve through annular plates, forming a closed cooling water chamber between the intermediate sleeve and the oil pipe. Two connecting pipes are respectively set on both sides of the intermediate sleeve. One connecting pipe is connected to the cooling water inlet pipe, and the other connecting pipe is connected to the cooling water return pipe.

[0007] Specifically, the support block assembly includes four support blocks with an included angle of 90° between them, and one end of each support block is welded to the outer wall of the oil pipe.

[0008] Specifically, the support block forms a 45° angle with the length axis of the oil pipe, the support block is 4-5mm thick, the support block is 20-24mm long, and the support block height is such that the gap between the support block and the middle casing after being welded onto the oil pipe is no more than 2mm.

[0009] Specifically, an outer sleeve is welded onto the middle sleeve at the support block assembly, and the width of the outer sleeve is selected to be 100-200mm.

[0010] Specifically, both the inlet and return oil pipes are fitted with arc-shaped bends at their ends.

[0011] Specifically, the casing support includes an upper casing support and a lower casing support. The upper and lower casing supports are connected and fixed to the furnace body ring by four bolts on both sides. The upper and lower casing supports are each provided with two semi-circular grooves in the middle, and the curvature of the semi-circular grooves is consistent with the curvature of the oil pipe surface.

[0012] Specifically, a protective cover is provided on the outside of the middle sleeve, the main body of the protective cover has the same curvature as the middle sleeve, and the cross-section of the protective cover has an inverted "U" shape.

[0013] This utility model has the following beneficial effects:

[0014] The converter body sleeve device designed in this utility model ensures that the hydraulic oil used in the converter slag-blocking cylinder is not directly baked by the high temperature of the furnace body. This not only reduces the temperature of the hydraulic oil and the impact of the hydraulic oil on the slag-blocking cylinder, but also improves the service life of the hydraulic cylinder.

[0015] The converter body sleeve device designed in this utility model has the advantages of low manufacturing cost, small space occupation, convenient installation and use, and good application effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the converter furnace body sleeve device.

[0017] Figure 2 yes Figure 1 Sectional view along the BB direction.

[0018] Figure 3 This is a schematic diagram of the upper sleeve support.

[0019] Figure 4 This is a top view of the upper sleeve support.

[0020] Figure 5 This is a schematic diagram of the lower sleeve support.

[0021] Figure 6 This is a top view of the lower sleeve support.

[0022] Figure 7 This is a schematic diagram of the protective cover.

[0023] Figure 8 yes Figure 7 Sectional view along the AA direction.

[0024] In the diagram: 1-oil pipe; 2-middle casing; 3-outer casing; 4-support block assembly; 5-connector head; 6-bend; 7-upper casing support; 8-lower casing support; 9-protective cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be described in further detail below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] like Figures 1-8 As shown, a converter body sleeve device includes an oil pipe 1, a sleeve, a support block assembly 4, a pipe head 5, a bend 6, a sleeve support, and a protective cover 9. The oil pipe 1 is installed on the furnace body through the sleeve support. The sleeve is fitted outside the oil pipe 1. The sleeve includes a middle sleeve 2 and an outer sleeve 3. The middle sleeve 2 is sealed and fitted outside the oil pipe 1. Two sets of support block assemblies 4 are fixedly connected between the middle sleeve 2 and the oil pipe 1. The outer sleeve 3 is fixedly fitted outside the middle sleeve 2 and is located outside the middle sleeve 2 at the support block assembly 4.

[0027] Oil pipe 1 is arc-shaped, and its curvature matches that of the furnace body, which helps reduce manufacturing costs and space occupation. The length of oil pipe 1 extends from the moving side of the converter to near the slag-blocking oil cylinder. Oil pipe 1 includes an oil inlet pipe and an oil return pipe, both of which are fitted with an intermediate sleeve 2.

[0028] The middle casing 2 is arc-shaped, and the arc of the middle casing 2 is consistent with the arc of the oil pipe 1. The middle casing 2 is fitted around the middle part of the outer side of the oil pipe 1 along the arc. The length of the middle casing 2 is 80-100mm shorter at both ends of the oil pipe 1.

[0029] The two ends of the middle sleeve 2 are sealed and welded with oil pipes 1 through annular plates, forming a closed cooling water chamber between the middle sleeve 2 and the oil pipes 1. The middle sleeve 2 is provided with two connecting pipes 5, which are respectively located on both sides of the middle sleeve 2 as cooling water inlet and outlet connecting pipes. One connecting pipe 5 is connected to the cooling water inlet pipe, and the other connecting pipe 5 is connected to the cooling water return pipe.

[0030] To ensure uniform cavity between tubing 1 and casing 2 and normal water flow, in addition to the supports at both ends, two sets of support blocks 4 are evenly distributed in the middle. To facilitate uniform support around each set of support blocks 4, each set of support blocks 4 includes four support blocks with an included angle of 90° between them. One end of each support block is welded to the outer wall of tubing 1.

[0031] To ensure convenient installation during casing installation and prevent jamming, the support block is positioned at a 45° angle to the axis of the oil pipe 1 along its straight length. The support block is 4-5mm thick, 20-24mm long, and its height is such that the gap between the support block and the intermediate casing 2 after welding onto the oil pipe 1 is no more than 2mm. This prevents excessive gaps from increasing the scratch damage to the intermediate casing 2.

[0032] To prevent the middle sleeve 2 from thinning and leaking due to long-term slight vibration and the scraping of the support block against the middle sleeve 2, an outer sleeve 3 is welded onto the middle sleeve 2 at the support block group 4 to further improve the strength of this part and fundamentally prevent water leakage. The width of the outer sleeve 3 is selected to be 100-200mm.

[0033] To reduce the high-pressure impact vibration on the weld seams of the oil pipe joints and the cylinder body caused by the high-pressure hydraulic oil reversal, arc-shaped bends 6 are added to the ends of both the inlet and return oil pipes to serve as hydraulic buffers.

[0034] The inlet and outlet pipes are fixedly supported by casing supports. The casing supports include an upper casing support 7 and a lower casing support 8. The upper casing support 7 and the lower casing support 8 are connected and fixed to the furnace body ring by four bolts on both sides. The upper casing support 7 and the lower casing support 8 are each provided with two semi-circular grooves in the middle. The curvature of the semi-circular grooves is consistent with the curvature of the surface of the oil pipe 1.

[0035] To prevent slag from falling off the furnace mouth and damaging the sleeve device, and to facilitate the inspection and maintenance of the sleeve, a protective cover 9 is installed on the outside of the middle sleeve 2. The protective cover 9 is fixed to the upper part of the middle sleeve 2 by a bracket. The curvature of the main body of the protective cover 9 is consistent with the curvature of the middle sleeve 2, and the cross-section of the protective cover 9 has an inverted "U" shape.

[0036] A converter furnace body sleeve device is used between the driven side trunnion disengagement ring and the slag-blocking cylinder to deliver hydraulic oil. At the same time, due to the presence of flowing water in the middle layer of the sleeve device, the hydraulic oil pipe is not directly baked by the high temperature furnace body, which reduces the impact of hydraulic oil on the slag-blocking cylinder and improves its service life.

[0037] This utility model is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

[0038] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A converter furnace body sleeve device, characterized in that, It includes an oil pipe, a casing, and a casing support. The oil pipe is installed on the furnace body via the casing support. The casing is fitted around the oil pipe. The casing includes an inner casing and an outer casing. The inner casing is sealed and fitted around the outside of the oil pipe. At least two sets of support block groups are fixedly connected between the inner casing and the oil pipe. The outer casing is fixedly fitted around the outside of the inner casing. The outer casing is located outside the inner casing at the support block group. The inner casing is provided with two connecting pipe heads.

2. The converter furnace body sleeve device according to claim 1, characterized in that, The oil pipe is arc-shaped, and the arc of the oil pipe is consistent with the arc of the furnace body. The oil pipe includes an oil inlet pipe and an oil return pipe, and both the oil inlet pipe and the oil return pipe are fitted with an inner sleeve.

3. The converter furnace body sleeve device according to claim 2, characterized in that, The intermediate sleeve is arc-shaped, and the arc of the intermediate sleeve is the same as that of the oil pipe. The length of the intermediate sleeve is 80-100mm shorter at both ends of the oil pipe. The oil pipe is sealed and welded to both ends of the intermediate sleeve through annular plates, forming a closed cooling water chamber between the intermediate sleeve and the oil pipe. Two connecting pipes are respectively set on both sides of the intermediate sleeve. One connecting pipe is connected to the cooling water inlet pipe, and the other connecting pipe is connected to the cooling water return pipe.

4. The converter body sleeve device according to claim 1, characterized in that, The support block assembly includes four support blocks with an included angle of 90° between them, and one end of each support block is welded to the outer wall of the oil pipe.

5. The converter furnace body sleeve device according to claim 4, characterized in that, The support block forms a 45° angle with the length axis of the tubing, has a thickness of 4-5 mm, a length of 20-24 mm, and a height such that the gap between the support block and the casing after welding onto the tubing is no more than 2 mm.

6. The converter furnace body sleeve device according to claim 1, characterized in that, An outer sleeve is welded onto the middle sleeve at the support block assembly location, with the width of the outer sleeve selected to be 100-200mm.

7. The converter furnace body sleeve device according to claim 2, characterized in that, Both the inlet and return oil pipes are fitted with arc-shaped bends at their ends.

8. The converter body sleeve device according to claim 1, characterized in that, The casing support includes an upper casing support and a lower casing support. The upper and lower casing supports are connected and fixed to the furnace body ring by four bolts on both sides. The upper and lower casing supports are provided with two semi-circular grooves in the middle, and the curvature of the semi-circular grooves is consistent with the curvature of the oil pipe surface.

9. The converter furnace body sleeve device according to claim 1, characterized in that, The outer casing of the middle sleeve is covered with a protective cover. The curvature of the main body of the protective cover is consistent with the curvature of the middle sleeve, and the cross-section of the protective cover has an inverted "U" shape.

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