All-metal hearth for supporting steel coils in a silicon steel ring furnace

Abstract

The utility model relates to the field of metal material heat treatment, concretely to a full metal furnace table for oriented silicon steel ring furnace in -steel coil support in furnace. A full metal furnace table for oriented silicon steel ring furnace in -steel coil support in furnace, including rotating trolley, the top of rotating trolley is equipped with refractory layer (5), it is characterized by: still including support base (1), bottom disc (2), steel coil (3), seal cover (4), sealing sand (6) and protective gas sleeve (7), support base (1) rotatably be located on refractory layer (5); Bottom disc (2) rotatably be located on support base (1); Steel coil (3) is located on bottom disc (2); Seal cover (4) with open downward buckling on refractory layer (5) and will support base (1), bottom disc (2) and steel coil (3) are all covered in the inside; Outer sleeve (72) from refractory layer (5) after wearing into the vertical vent hole (13) of bottom disc (2) in, core pipe (71) passes through bottom disc vent hole (22) and enters steel coil (3). The utility model has high heat transfer efficiency, and long service life.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment of metallic materials, specifically an all-metal furnace platform for supporting steel coils inside an oriented silicon steel ring furnace. Background Technology

[0002] The high-temperature recrystallization annealing ring furnace is one of the core heat treatment equipment in the production process of high magnetic induction oriented silicon steel. Its function is to heat the oriented silicon steel strip to a maximum of 1250℃ to achieve high-temperature recrystallization annealing, so as to achieve uniform crystal structure, coarse grains, and removal of harmful impurities in the silicon steel, thereby obtaining high-quality high magnetic induction and low iron loss oriented silicon steel products.

[0003] In the high-temperature recrystallization annealing annular furnace, the steel coil is placed on the refractory material on top of the rotating trolley inside the furnace. The trolley supporting the steel coil rotates at set time requirements to transport the steel coil to different process sections for heat treatment. In addition, protective gas must be introduced into the steel coil throughout the entire process in the furnace to protect it from oxidation.

[0004] Traditional furnace platforms used for supporting steel coils include brick-built platforms and conventional metal platforms, which mainly have the following problems:

[0005] Problems with the brick-built furnace platform:

[0006] 1. During the production process, steel coils need to be repeatedly hoisted, which can easily damage the furnace platform. The furnace platform needs to be repeatedly repaired, resulting in a large amount of maintenance.

[0007] 2. The brick-built furnace platform has poor heat transfer efficiency. During the heating process of the steel coil, the temperature difference between the hot and cold spots of the steel coil is large, which affects the quality of the bottom layer and the magnetic properties.

[0008] Problems with conventional metal furnace platforms:

[0009] 1. Conventional metal furnace platforms lack ventilation holes, preventing the protective gas inside the inner casing from circulating internally. This results in a significant radial temperature difference between the inner and outer rings of the steel coil, which greatly affects the plate shape.

[0010] 2. Conventional metal furnace platforms are positioned using positioning bricks, which are part of the refractory material of the upper trolley. The positioning bricks are in the form of a ring structure, with the inner diameter of the ring slightly larger than the diameter of the support base. During repeated hoisting of the support base, the positioning bricks are easily damaged, which in turn causes large-area damage to the refractory material of the upper trolley. Utility Model Content

[0011] In order to overcome the shortcomings of the existing technology and provide a heat treatment equipment with high heat transfer efficiency and long service life, this utility model discloses an all-metal furnace platform for supporting steel coils inside an oriented silicon steel ring furnace.

[0012] This utility model achieves its invention objective through the following technical solution:

[0013] An all-metal furnace platform for supporting steel coils inside an annular furnace of grain-oriented silicon steel includes a rotating trolley with a refractory layer on its top. The platform further includes a support base, a chassis, steel coils, a sealing cover, sealing sand, and a protective gas sleeve.

[0014] The support base is rotatably mounted on the refractory layer. The support base is provided with a horizontal vent hole that runs through the support base in the horizontal direction and a vertical vent hole that runs through the support base in the vertical direction. The horizontal vent hole and the vertical vent hole are interconnected.

[0015] The connection structure between the support base and the refractory layer serves two purposes: firstly, it provides positioning during the hoisting and replacement of the support base; secondly, it prevents the metal furnace platform from shifting during the rotation and heating process of the rotating trolley.

[0016] The chassis is rotatably mounted on a support base. The chassis has a vertical vent hole that runs through the chassis, and the chassis vent hole and the vertical vent hole are directly opposite each other.

[0017] The steel coil is placed on the chassis, with the through hole in the middle of the steel coil and the vent hole of the chassis facing each other.

[0018] The refractory layer is also provided with an annular sand sealing groove. The cover is placed on the refractory layer with its opening facing downwards, covering the support base, chassis and steel coil inside. The edge of the opening of the cover is located in the sand sealing groove, which is filled with sealing sand to seal the cover and the refractory layer, thereby preventing the protective gas inside the cover from escaping.

[0019] The protective gas sleeve includes a core tube and an outer tube. The core tube is installed inside the outer tube. After the outer tube exits from the refractory layer, it enters the vertical vent hole of the chassis. The core tube continues to exit from the vertical vent hole, passes through the chassis vent hole, and enters the steel coil. The protective gas is introduced into the enclosure through the core tube to prevent the steel coil from being oxidized. The protective gas circulates within the enclosure. Part of the protective gas is discharged through the vertical vent hole of the support base and the chassis vent hole, through the interlayer between the protective gas sleeve, the outer tube, and the core tube. Another part of the protective gas is discharged through the horizontal vent hole of the support base, also through the interlayer between the protective gas sleeve, the outer tube, and the core tube.

[0020] The all-metal furnace platform for supporting steel coils inside an annular furnace of oriented silicon steel is characterized by:

[0021] A refractory recessed ring is provided on the refractory layer;

[0022] The bottom and top of the support base are respectively provided with a support protrusion ring and a support boss. The support protrusion ring is rotatably embedded in the refractory concave ring, so that the support base is rotatably mounted on the refractory layer.

[0023] The bottom of the chassis is provided with a chassis recessed ring, which is fitted onto the support boss so that the chassis can be rotatably mounted on the support base.

[0024] This utility model discloses a novel all-metal furnace platform for supporting steel coils inside the furnace. While meeting the support strength requirements of a 1250℃ high-temperature annular furnace, it also ensures the internal circulation of protective gas to guarantee product quality.

[0025] This utility model has the following beneficial effects:

[0026] 1. High heat transfer efficiency: During the heating process of the steel coil, both the support base and the chassis are equipped with vents, which helps the circulation of the protective gas inside the enclosure. By controlling the flow rate of the protective gas, the pressure of the protective gas inside the enclosure can be controlled. This not only prevents the steel coil from being oxidized, but also significantly reduces the radial temperature difference between the inner and outer rings of the steel coil, improves the bottom layer quality and magnetic properties of the steel coil, improves the shape of the steel coil after heat treatment, and enhances product quality.

[0027] 2. Excellent protection: The refractory layer on the top of the rotary trolley and the support base are positioned using a concave and convex ring structure, which is simple in structure. At the same time, the support base helps to protect the refractory layer on the top of the rotary trolley during repeated hoisting, greatly reducing the risk of damage to the refractory layer, extending its service life, reducing the amount of furnace repair and maintenance, and helping to improve the production capacity of the ring furnace.

[0028] 3. Simplified structure: The refractory material on the top of the rotary trolley and the support base are positioned using a concave and convex ring structure, which is simple in structure. At the same time, the support base helps to protect the refractory material on the top of the rotary trolley during repeated hoisting, greatly reducing the risk of damage to the refractory material.

[0029] 4. Extended lifespan: The metal chassis has recessed rings on both sides. When the metal chassis undergoes significant deformation under heat, it can be flipped over for use, greatly extending its service life. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of the present invention.

[0031] Figure 2 This is a cross-sectional view of the support base in the main view direction of this utility model.

[0032] Figure 3 This is a cross-sectional view of the support base in this utility model from a bottom view.

[0033] Figure 4 This is a cross-sectional view of the chassis in the main view direction of this utility model. Detailed Implementation

[0034] The present invention will be further illustrated by specific embodiments below. Example

[0035] An all-metal furnace platform for supporting steel coils inside an annular furnace of grain-oriented silicon steel includes a support base 1, a chassis 2, a steel coil 3, a cover 4, a rotating trolley, sealing sand 6, and a protective gas sleeve 7, as shown below. Figures 1-4 As shown, the specific structure is:

[0036] The top of the rotating trolley is provided with a refractory layer 5, and a refractory concave ring 51 is provided on the refractory layer 5;

[0037] Support base 1 Figure 2 and Figure 3 As shown: The bottom and top of the support base 1 are respectively provided with a support protrusion ring 11 and a support protrusion 14. The support base 1 is provided with a horizontal ventilation hole 12 that penetrates the support base 1 in the horizontal direction and a vertical ventilation hole 13 that penetrates the support base 1 in the vertical direction. The horizontal ventilation hole 12 and the vertical ventilation hole 13 are interconnected.

[0038] The supporting protruding ring 11 is rotatably embedded in the refractory concave ring 51, thereby allowing the supporting base 1 to be rotatably mounted on the refractory layer 5. The connection structure between the supporting base 1 protruding ring 11 and the refractory layer 5 refractory concave ring 51 is used for positioning the supporting base 1 during hoisting and replacement, and also to prevent the metal furnace platform from shifting during the rotation and heating process of the rotating trolley.

[0039] Chassis 2 Figure 4 As shown: The bottom of the chassis 2 is provided with a chassis recessed ring 21, and the chassis 2 is provided with a chassis vent 22 that runs vertically through the chassis 2.

[0040] The chassis concave ring 21 is sleeved on the support boss 14 so that the chassis 2 is rotatably mounted on the support base 1, and the chassis vent 22 and the vertical vent 13 are directly opposite each other.

[0041] The steel coil 3 is placed on the chassis 2, with the through hole in the middle of the steel coil 3 and the ventilation hole 22 of the chassis facing each other.

[0042] The refractory layer 5 is also provided with an annular sand sealing groove 52. The cover 4 is placed on the refractory layer 5 with its opening facing downwards, covering the support base 1, the chassis 2 and the steel coil 3 inside. The edge of the opening of the cover 4 is located inside the sand sealing groove 52. The sand sealing groove 52 is filled with sealing sand 6 to seal the cover 4 and the refractory layer 5, thereby preventing the protective gas inside the cover 4 from escaping.

[0043] The protective gas sleeve 7 includes a core tube 71 and an outer tube 72. The core tube 71 is inserted inside the outer tube 72. The outer tube 72 extends out of the refractory layer 5 and enters the vertical vent hole 13 of the chassis 2. The core tube 71 continues to extend out of the vertical vent hole 13, passes through the chassis vent hole 22, and enters the steel coil 3. The protective gas is introduced into the cover 4 through the core tube 71 to prevent the steel coil 3 from being oxidized. The protective gas circulates in the cover 4. Part of the protective gas is discharged through the vertical vent hole 13 of the support base 1 and the chassis vent hole 22 of the chassis 2, through the interlayer between the outer tube 72 and the core tube 71 of the protective gas sleeve 7. Another part of the protective gas is also discharged through the horizontal vent hole 12 of the support base 1, through the interlayer between the outer tube 72 and the core tube 71 of the protective gas sleeve 7.

Claims

1. An all-metal furnace platform for supporting steel coils inside an annular furnace of oriented silicon steel, comprising a rotating trolley, wherein the top of the rotating trolley is provided with a refractory layer (5), characterized in that: It also includes a support base (1), a chassis (2), a steel coil (3), a cover (4), sealing sand (6), and a protective gas sleeve (7). The support base (1) is rotatably mounted on the refractory layer (5). The support base (1) is provided with a horizontal ventilation hole (12) that penetrates the support base (1) in the horizontal direction and a vertical ventilation hole (13) that penetrates the support base (1) in the vertical direction. The horizontal ventilation hole (12) and the vertical ventilation hole (13) are interconnected. The chassis (2) is rotatably mounted on the support base (1). The chassis (2) has a chassis vent (22) that runs vertically through the chassis (2), and the chassis vent (22) and the vertical vent (13) are directly opposite each other. The steel coil (3) is placed on the chassis (2), and the through hole in the middle of the steel coil (3) and the ventilation hole (22) of the chassis are directly opposite each other; The refractory layer (5) is also provided with an annular sand sealing groove (52). The cover (4) is placed on the refractory layer (5) with its opening facing downwards, and the support base (1), the chassis (2) and the steel coil (3) are all covered inside. The edge of the opening of the cover (4) is located in the sand sealing groove (52). The sand sealing groove (52) is filled with sealing sand (6) to seal the cover (4) and the refractory layer (5). The protective gas sleeve (7) includes a core tube (71) and an outer tube (72). The core tube (71) is inserted inside the outer tube (72). The outer tube (72) passes through the refractory layer (5) and then enters the vertical vent hole (13) of the chassis (2). The core tube (71) continues to pass through the vertical vent hole (13) and enters the steel coil (3) through the chassis vent hole (22). The protective gas is introduced into the cover (4) through the core tube (71).

2. The all-metal furnace platform for supporting steel coils inside an annular furnace of grain-oriented silicon steel as described in claim 1, characterized in that: A refractory recessed ring (51) is provided on the refractory layer (5); The bottom and top of the support base (1) are respectively provided with a support protrusion (11) and a support boss (14). The support protrusion (11) is rotatably embedded in the refractory concave ring (51), so that the support base (1) is rotatably disposed on the refractory layer (5). The bottom of the chassis (2) is provided with a chassis recess (21), which is sleeved on the support boss (14) so ​​that the chassis (2) is rotatably mounted on the support base (1).

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