Integrated heat insulation roller way support for tapping hole of end discharging plate blank heating furnace

Abstract

The invention relates to an integrated heat insulation roller way support for a tapping hole of an end discharging plate blank heating furnace, and belongs to the technical field of steel rolling heating furnace equipment in the metallurgical industry. According to the technical scheme, a main vertical plate (5) is arranged on the tapping hole side of the slab heating furnace, and a front vertical rib plate (3) and a rear vertical rib plate (4) are welded to the two sides of the main vertical plate (5) respectively; a bearing seat installation base plate (9) and a middle-layer plate (7) which are arranged up and down are welded on the main vertical plate (5), a furnace body side bearing seat (12) of a furnace discharging roller way (19) is fixed on the bearing seat installation base plate (9), a plurality of heat shielding plates (8) are arranged on the side, facing a steel outlet of the slab heating furnace, of the furnace body side bearing seat (12), and composite heat insulation layers (11) are arranged on the sides, facing the steel outlet of the slab heating furnace, of the heat shielding plates (8) and the main vertical plate (5). And an S-shaped water pipe (6) and a slag chute (2) are arranged in the composite heat insulation layer (11). The invention has the beneficial effects of long-acting use in a high-temperature environment, effective shielding of high-temperature furnace gas radiation, and protection of a roller way bearing seat.

Description

Technical Field

[0001] The invention relates to an integrated heat-insulating roller stand for a steel outlet of an end-discharging slab heating furnace, belonging to the technical field of steel rolling heating furnace equipment in the metallurgical industry. Background Art

[0002] Slab heating furnaces generally use mechanical lifting end discharging. When the slab that has been heated and qualified needs to be discharged, the lifting furnace door is opened, and the mechanical discharging rod is extended into the furnace to lift the slab out and place it on the steel discharge roller. Then the discharge roller conveys the slab to the descaling and rolling process.

[0003] When the end-discharging heating furnace is opened, the high-temperature flue gas of about 1250℃ in the furnace will cause serious radiation burning to the roller bearings and roller foundation in the tapping area. The tapping equipment is frequently affected by the high-temperature flue gas, resulting in the following consequences: 1) The bearing seats of the steel tapping rollers in the tapping area, including the bearings, often experience "locking" and burning bearing accidents due to frequent baking temperatures. 2) The concrete foundation of the roller table at the steel outlet is exposed to high temperature for a long time and is prone to burning and cracking, which further damages the anchor bolts of the roller table bearing seat and causes the slag chute holes set in the concrete to be damaged and blocked; 3) The primary anchor bolts of the independent bearing seat bracket are often burned, damaged, and loosened, causing the roller table to become unstable.

[0004] The service life of the roller foundation in the traditional tapping area is less than 1.5 years, and the roller bearing accidents are frequent, which seriously affects the smooth production and causes great personal safety hazards to operators and maintenance personnel. Therefore, it is necessary to develop an integrated roller support with a long life cycle that has thermal insulation protection for the roller bearing seat and integrated slag removal function. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated heat-insulating roller support for the steel outlet of an end-discharging slab heating furnace, which can be used for a long time in a high-temperature environment, effectively shield the radiation of high-temperature furnace gas, protect the roller bearing seat, and solve the problems existing in the background technology.

[0006] The technical solution of the present invention is: An integrated heat-insulating roller support for a steel-outlet of an end-discharging slab heating furnace comprises a bottom plate, a slag chute, a front vertical rib plate, a rear vertical rib plate, a main vertical plate, an S-shaped water pipe, a middle plate, a heat shield plate, a bearing seat mounting base plate and a composite heat-insulating layer, wherein the main vertical plate is arranged at the steel-outlet side of the slab heating furnace, and the front vertical rib plate and the rear vertical rib plate are welded on both sides of the main vertical plate respectively; the bearing seat mounting base plate and the middle plate arranged up and down are welded on the main vertical plate, the furnace body side bearing seat of the furnace-discharging roller is fixed on the bearing seat mounting base plate, and the furnace body side bearing seat is provided with a plurality of heat shield plates facing the steel-outlet side of the slab heating furnace, and the heat shield plate and the main vertical plate facing the steel-outlet side of the slab heating furnace are both provided with a composite heat-insulating layer, and the S-shaped water pipe and the slag chute are provided in the composite heat-insulating layer.

[0007] The slag chute in the composite heat insulation layer cooperates with the steel outlet and slag ditch of the slab heating furnace.

[0008] The slag chute in the composite heat insulation layer is inclined toward one side of the slag ditch.

[0009] The slag chute in the composite heat insulation layer is inclined at an angle of 45° to 55° toward the slag ditch.

[0010] The bottom plate, the front rib plate, the rear rib plate, the main vertical plate, the middle plate, the heat shielding plate and the bearing seat mounting base plate are welded into a frame structure.

[0011] The main vertical plate is welded on the bottom plate, the middle plate and the bearing seat mounting base plate are respectively welded on the main vertical plate, the bearing seat mounting base plate is located above the middle plate, the heat shield plate is welded on the middle plate, and the heat shield plate is located between the steel outlet of the slab heating furnace and the bearing seat on the furnace body side.

[0012] The main vertical plate and the heat shield plate are both provided with Y-shaped anchor hooks.

[0013] The beneficial effects of the present invention are as follows: water cooling and composite heat insulation are adopted to effectively ensure that the bearing seat of the steel-outlet roller table can work reliably and stably for a long time in a high temperature environment, reduce the accident rate of the steel-outlet roller table by more than 98%, and avoid damage to the concrete foundation of the steel-outlet roller table. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 This is a schematic diagram of the installation of the present invention; Figure 4 This is a schematic diagram of the main vertical plate of the present invention; Figure 5 This is a schematic diagram of an S-shaped water pipe of the present invention; Figure 6 It is a schematic diagram of the ribbed plate of the present invention; In the figure: bottom plate 1, slag chute 2, front rib plate 3, rear rib plate 4, main vertical plate 5, S-shaped water pipe 6, middle plate 7, heat shielding plate 8, bearing seat mounting base plate 9, Y-shaped anchor hook 10, composite insulation layer 11, furnace body side bearing seat 12; concrete foundation 13, high-temperature furnace chamber 14, steel billet 15, lifting furnace door 16, discharge rod 17, high-temperature flue gas 18, furnace discharge roller 19, connecting beam 20, transmission side bearing seat 21, transmission side roller bracket 22, the present invention 23. DETAILED DESCRIPTION

[0015] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0016] See attached Figure 1-6 , an integrated heat-insulating roller support for the steel outlet of an end-discharging slab heating furnace comprises a bottom plate 1, a slag chute 2, a front rib plate 3, a rear rib plate 4, a main plate 5, an S-shaped water pipe 6, a middle plate 7, a heat shielding plate 8, a bearing seat mounting base plate 9 and a composite heat-insulating layer 11, the main plate 5 is arranged on the steel outlet side of the slab heating furnace, and the front rib plate 3 and the rear rib plate 4 are welded on both sides of the main plate 5 respectively; the bearing seat mounting base plate 9 and the middle plate 7 arranged up and down are welded on the main plate 5, and the furnace body side bearing seat 12 of the furnace outlet roller 19 is fixed on the bearing seat mounting base plate 9, and the furnace body side bearing seat 12 is provided with a plurality of heat shielding plates 8 toward the steel outlet side of the slab heating furnace, and the heat shielding plate 8 and the main plate 5 are provided with a composite heat-insulating layer 11 toward the steel outlet side of the slab heating furnace, and the composite heat-insulating layer 11 is provided with an S-shaped water pipe 6 and a slag chute 2.

[0017] In this embodiment, refer to the attached Figure 1-6 The integrated heat-insulating roller support has an overall dimension of 8700mm (length) × 2500mm (height), and a total assembly weight of approximately 20 tons.

[0018] As shown in the attached drawings, the integrated heat-insulating roller support is composed of a bottom plate 1, a slag chute 2, a front rib plate 3, a rear rib plate 4, a main plate 5, an S-shaped water pipe 6, a middle plate 7, a heat shield 8, a bearing seat mounting base plate 9, a Y-shaped anchor hook 10 and a composite heat-insulating layer 11, wherein: The bottom plate 1, the front rib plate 3, the rear rib plate 4, the main vertical plate 5, the middle plate 7, the heat shielding plate 8 and the bearing seat mounting base plate 9 are assembled and manufactured into a frame structure by riveting and welding.

[0019] The bottom plate 1, the middle plate 7, the bearing seat mounting base plate 9 and the main vertical plate 5 are welded in a "W" shape to form a stable frame.

[0020] The base plate 1 is fastened to the heating furnace foundation by primary anchor bolts.

[0021] The bottom plate 1 is about 1000mm lower than the lower edge of the steel outlet, and the concrete foundation of the roller table on the furnace side is 12000mm lower than the traditional design, which can effectively avoid the burning and cracking of concrete.

[0022] The main vertical plate 5 is made of 80mm thick Q235B plain carbon steel plate by one-time cutting. According to the arrangement of the furnace roller, a plurality of concave slots are cut on the upper part of the main vertical plate 5 for installing the bearing seat, and U-shaped slots are cut corresponding to the positions of the four discharge rods 17.

[0023] As shown in the figure, the heat insulation board 8, the middle board 7 and the S-shaped water pipe 6 are welded to form a 90mm deep cavity, in which a 30mm fiber felt is pasted and a 60mm thick low-cement castable is poured.

[0024] The heat shielding plate 8 is a rectangular steel plate cut and manufactured with a thickness of 20 mm. According to the arrangement of the furnace discharge rod 17, several heat shielding plates can be arranged on one roller, or the heat shielding plates of multiple rollers can be manufactured in one piece to ensure the shielding effect.

[0025] A steel structure support frame and a composite heat insulation layer structure are used to replace the traditional concrete foundation design for about 1000mm below the middle plate 7, which can completely resist the heat radiation from the high-temperature furnace gas 18.

[0026] The 11 roller supports at the steel outlet are manufactured as a whole, while the traditional roller supports need to be divided into 5 sections. The structure of the present invention is more stable and reliable; The transmission side bearing seat 21 is mounted on the bearing seat mounting base plate 9 and fastened with bolts; The S-shaped water pipe 6 is welded and installed in the groove corresponding to the front rib plate 3 of the support frame, and is welded to the heat shield plate 8.

[0027] The S-shaped water pipe 6 is a cooling water circuit welded with φ89×16mm seamless steel pipes, and is U-bent downward at the positions of the four discharge rods 17 to ensure that the discharge rods 17 pass smoothly.

[0028] As shown in the figure, the slag chute 2 is installed in the corresponding square holes of the main vertical plate 5 and the bottom plate 1.

[0029] The cross-sectional dimensions of the slag chute 2 are 1000 mm (width) × 380 mm (height), and two are arranged for each batch of billets. In this case, there are double rows of billets, with a total of four slag chutes. The slag chute openings are tilted toward the slag ditch side with an inclination angle of 45° to 55° to ensure that the oxidized iron scale dropped from the billets out of the furnace can slide smoothly into the slag ditch.

[0030] The figure shows that the main vertical plate 5, the heat shield plate 8, the S-shaped water pipe 6, the Y-shaped anchor hook 10 is welded on the fire-facing surface of the furnace body, and the composite insulation layer 11 is installed on the fire-facing surface in the area.

[0031] The composite insulation layer 11 is pasted with 30mm fiber felt close to the steel plate, and the outer layer is poured with low cement castable; The thickness of the composite heat-insulating layer 11 casted with low-cement refractory castable is 60 mm above the middle plate 7 and 240 mm below the middle plate 7 .

[0032] The vertical and horizontal spacing of the Y-shaped anchor hooks is 150mm.

[0033] As shown in the figure, the integrated heat-insulating roller support of the present invention is installed on the side of the high-temperature furnace 14, and is connected by bolts through multiple cross beams 20 and the roller support 22 on the roller transmission side. The bottom plate 1 and the heating furnace foundation are fastened by bolts to ensure their stability and reliability, while increasing the stability of the transmission side bearing support 22.

[0034] The figure shows that during the opening of the lifting furnace door 16 for billet unloading operation, the overflow of high-temperature flue gas 18 and the radiant heat from the furnace are effectively shielded by the composite insulation layer 11 of the roller support of the present invention, which greatly improves the on-site working environment of the roller bearing seat 12 on the furnace side.

[0035] As shown in the figure, the iron oxide scale dropped from the steel billet 15 during the steel tapping process can smoothly slide into the slag ditch through the slag chute 2.

[0036] The effects achieved by the present invention are as follows: 1) The S-shaped cooling water pipe and composite heat insulation layer can effectively shield the roller bearing from the high-temperature furnace gas, reducing the ambient temperature of the bearing seat by more than 800°C, and the temperature of the bearing seat end cover from 200°C to 55°C, which greatly improves the working environment of the roller bearing and effectively eliminates the roller bearing "locking" accident caused by heat; 2) This integrated roller support connects multiple independent supports into one, which significantly improves the stability of the support and eliminates the problem of loose and damaged support feet; 3) The installation surface of this integrated roller stand is more than 1000mm lower than that of the traditional roller stand, and the concrete foundation level is about 500mm lower than the lower edge of the steel outlet, so that the concrete foundation part avoids the high temperature area and avoids burning damage, achieving the purpose of long-term safe use; 4) The roller bearing seat is stuck in the groove of the integrated roller support. The bearing seat can slide slightly in the groove along the roller axial direction, eliminating the impact of thermal expansion and contraction of the roller on the roller bearing, greatly improving the service life of the bearing and facilitating maintenance; 5) The integrated roller support for furnace discharge is integrated with a sheet iron chute, which completely replaces the original concrete cast slag chute, is smoother and less blocked, and eliminates the safety hazards of manual slag cleaning operations.

Claims

1. An integrated heat-insulating roller stand for a steel outlet of a slab heating furnace for end-discharging, characterized in that: The invention comprises a bottom plate (1), a slag chute (2), a front rib plate (3), a rear rib plate (4), a main plate (5), an S-shaped water pipe (6), a middle plate (7), a heat shield plate (8), a bearing seat mounting base plate (9) and a composite heat insulation layer (11). The main plate (5) is arranged on the steel outlet side of the slab heating furnace. The front rib plate (3) and the rear rib plate (4) are welded to both sides of the main plate (5). The bearing seat mounting base plate (9) and the middle plate (7) arranged up and down are welded on the main plate (5). The furnace body side bearing seat (12) of the furnace discharge roller (19) is fixed on the bearing seat mounting base plate (9). The furnace body side bearing seat (12) is provided with a plurality of heat shield plates (8) on the side facing the steel outlet of the slab heating furnace. The heat shield plate (8) and the main plate (5) are provided with a composite heat insulation layer (11) on the side facing the steel outlet of the slab heating furnace. The composite heat insulation layer (11) is provided with an S-shaped water pipe (6) and a slag chute (2) in the composite heat insulation layer (11).

2. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 1, characterized in that: The slag chute (2) in the composite heat insulation layer (11) cooperates with the steel outlet and slag ditch of the slab heating furnace.

3. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 2, characterized in that: The slag chute (2) in the composite heat insulation layer (11) is inclined toward one side of the slag groove.

4. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 3, characterized in that: The slag chute (2) in the composite heat insulation layer (11) is inclined at an angle of 45° to 55° toward the slag groove side.

5. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 1, characterized in that: The bottom plate (1), the front rib plate (3), the rear rib plate (4), the main vertical plate (5), the middle plate (7), the heat shield plate (8) and the bearing seat mounting base plate (9) are welded into a frame structure.

6. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 5, characterized in that: The main vertical plate (5) is welded to the bottom plate (1), the middle plate (7) and the bearing seat mounting base plate (9) are respectively welded to the main vertical plate (5), the bearing seat mounting base plate (9) is located above the middle plate (7), the heat shielding plate (8) is welded to the middle plate (7), and the heat shielding plate (8) is located between the steel outlet of the slab heating furnace and the bearing seat (12) on the furnace body side.

7. The integrated heat-insulated roller stand for the steel outlet of the end-discharging slab heating furnace according to claim 6, characterized in that: The main vertical plate (5) and the heat shield plate (8) are both provided with Y-shaped anchor hooks (10).

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