Continuous annealing furnace for cold rolling annealing of low-alloy high-strength steel

Abstract

The utility model relates to the technical field of continuous annealing furnaces, in particular to a continuous annealing furnace for cold rolling and annealing low-alloy high-strength steel, which comprises a conveying device, a heating device and gas supply devices with control systems, one end of the conveying device is fixedly connected with the heating device through bolts, and the gas supply devices are arranged on two sides of the heating device. One end of the gas supply device is fixedly connected with a flange assembly, and the flange assembly is fixedly connected with a mixing device through bolts; the mixing device comprises a mounting shell and a driving motor with a protective shell, a mounting groove is formed in the inner side of the mounting shell, a mounting block is mounted on the inner side of the mounting groove, a connecting pipeline is fixedly connected to the bottom of the mounting shell, a hollow plate is fixedly connected to one side of the mounting block, and a dispersing device is fixedly connected to the inner side of the hollow plate. Gas of different gas sources can be finely divided, the gas is promoted to be fully blended, stable protection is provided for steel, and the surface smoothness and corrosion resistance of the steel are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to continuous annealing furnace technical field, concretely is a kind of continuous annealing furnace of cold rolling annealing low alloy high-strength steel. BACKGROUND

[0002] Continuous annealing furnace is the key equipment in the production process of cold rolling annealing low alloy high-strength steel, has decisive influence to the organization and performance of steel, adopts the heating mode of radiation tube, passes through high-temperature gas combustion in radiation tube, transmits heat to the steel outside radiation tube, rapidly promotes the temperature of steel;

[0003] After low alloy high-strength steel coil of cold rolling, through uncoiler is developed and enters continuous annealing furnace, in furnace, steel is sequentially passed through each functional section according to the process requirement of heating, soaking, cooling, overaging etc., so that steel occurs organizational structure change, thereby obtains the comprehensive performance such as expected high strength, good toughness and formability etc.;

[0004] The speed of charging equipment is too fast in the charging process of the continuous annealing furnace of cold rolling annealing low alloy high-strength steel, so that steel produces larger air current when entering furnace, brings surrounding air into furnace, and the air entering furnace can increase the oxygen content in furnace, when the oxygen content in furnace is too high, oxygen molecules have higher activity in high-temperature annealing furnace environment, these oxygen molecules will constantly impact iron atom on the surface of steel, and iron atom and oxygen molecules will occur oxidation reaction, so that a layer of iron oxide scale is formed on the surface of steel, thereby reducing the surface finish and corrosion resistance of steel;

[0005] Therefore, the continuous annealing furnace of cold rolling annealing low alloy high-strength steel is proposed for the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of continuous annealing furnace of cold rolling annealing low alloy high-strength steel to solve the problem that when the oxygen content in furnace is too high, oxygen molecules have higher activity in high-temperature annealing furnace environment, iron atom and oxygen molecules will occur oxidation reaction, so that a layer of iron oxide scale is formed on the surface of steel, thereby reducing the surface finish and corrosion resistance of steel.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of continuous annealing furnace of cold rolled annealing low alloy high-strength steel, including conveying device, heating device and gas supply device with control system, one end of the conveying device is fixedly connected with heating device by bolt, heating device both sides are equipped with gas supply device, one end of the gas supply device is fixedly connected with flange assembly, the flange assembly is fixedly connected with mixing device by bolt;The mixing device includes installation shell and drive motor with protection shell, installation groove is opened in the inside of the installation shell, installation block is installed in the inside of the installation groove, the bottom of the installation shell is fixedly connected with connecting pipeline, one side of the installation block is fixedly connected with hollow plate, the inside of the hollow plate is fixedly connected with dispersion device, the upper end of the dispersion device is fixedly connected with drive motor, the main shaft one end of the drive motor is fixedly connected with the inside of fan by passing through dispersion device, the inside of the blade of fan is equipped with stirring hole, the bottom of the hollow plate is fixedly connected with dispersion net.

[0009] As the further optimization of the utility model, the outside of the mixing device is fixedly connected with the upper end of the heating device, the connecting pipeline passes through the upper end of the heating device and communicates with the inside of the heating device, and the hollow plate is arranged inside the installation shell.

[0010] As the further optimization of the utility model, the dispersion device includes fixed supports, dispersion plates are fixedly connected between the fixed supports, dispersion holes are formed in the inside of the dispersion plates, and one end of each fixed support is fixedly connected with the inside of the hollow plate.

[0011] As the further optimization of the utility model, four installation grooves and installation blocks are arranged, the installation grooves and the installation blocks correspond to each other, the installation grooves and the installation blocks are clamped to each other, the installation grooves are symmetrically arranged inside the installation shell, and the installation grooves and the installation blocks are equal in shape.

[0012] As the further optimization of the utility model, a plurality of stirring holes are arranged, the stirring holes are evenly and equidistantly arranged on each blade of the fan, the shape of the cross section of the stirring hole is triangular, and the stirring hole passes through the blade of the fan and communicates with the inside of the hollow plate.

[0013] As the further optimization of the utility model, four dispersion plates are arranged, the shape of the cross section of each dispersion plate is fan-shaped, the arc-shaped side of each dispersion plate is closely attached to the inside of the hollow plate, and the dispersion plates are circularly arrayed with the center of the main shaft of the drive motor as the axis.

[0014] As the further optimization of the utility model, four dispersion holes are arranged, the shape of the cross section of each dispersion hole is rhombic, the dispersion holes are evenly and equidistantly distributed inside the dispersion plate, the dispersion holes are circularly arrayed with the center of the main shaft of the drive motor as the axis, and the dispersion holes pass through the dispersion plate and communicate with the inside of the hollow plate and the installation shell.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] In the utility model, the mixed device can finely divide the gas of different gas sources, greatly increase the gas contact area, cooperate with the high-speed rotating fan and the stirring hole, make strong turbulence in the hollow plate, promote the gas to fully mix, ensure that the mixed gas composition is uniform and stable, accurately meet the strict requirements of the process on the furnace atmosphere, provide stable protection for the steel, improve the surface smoothness and corrosion resistance of the steel, the mounting block and the mounting groove are mutually clamped, the hollow plate and the accessory parts are stably fixed, even under the high-speed rotation of the fan and the high-speed flow impact of the gas, the internal structure of the mixed device is still stable, the reliable operation of the equipment is maintained, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the whole structure schematic diagram of the mixed device of the utility model;

[0019] Figure 3 It is the sectional structure schematic diagram of the mounting shell of the utility model;

[0020] Figure 4 It is the disassembled structure schematic diagram of the fan of the utility model;

[0021] Figure 5 It is the whole structure schematic diagram of the dispersing device of the utility model.

[0022] In the drawing: 1, conveying device; 2, heating device; 3, gas supply device; 4, flange assembly;

[0023] 5, mixed device; 51, mounting shell; 52, mounting groove; 53, connecting pipeline; 54, hollow plate; 55, mounting block; 56, dispersing device; 561, fixed support; 562, dispersing plate; 563, dispersing hole; 57, driving motor; 58, fan; 59, stirring hole; 510, dispersing net. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0026] Referring to Figures 1-5 The utility model provides a technical scheme:

[0027] A kind of continuous annealing furnace of cold rolled annealing low alloy high-strength steel, including conveying device 1, heating device 2 and gas supply device 3 with control system, conveying device 1 one end is fixedly connected with heating device 2 by bolt, heating device 2 two sides are equipped with gas supply device 3, gas supply device 3 one end is fixedly connected with flange assembly 4, flange assembly 4 is fixedly connected with mixing device 5 by bolt;Mixing device 5 includes installation shell 51 and drive motor 57 with protective shell, installation groove 52 is formed in the inboard of installation shell 51, installation block 55 is installed in the inboard of installation groove 52, connecting pipeline 53 is fixedly connected at the bottom of installation shell 51, hollow plate 54 is fixedly connected on one side of installation block 55, hollow plate 54 inboard is fixedly connected with dispersion device 56, drive motor 57 upper end is fixedly connected with dispersion device 56, drive motor 57 main shaft one end is fixedly connected with the inboard of fan 58 by passing through dispersion device 56, the inboard of the blade of fan 58 is equipped with stirring hole 59, hollow plate 54 bottom is fixedly connected with dispersion net 510.

[0028] As a further embodiment of the above technical solution: dispersion device 56 includes fixed support 561, fixed support 561 are fixedly connected with dispersion plate 562, dispersion hole 563 is formed in the inboard of dispersion plate 562, one end of fixed support 561 is fixedly connected with the inboard of hollow plate 54, so that the gas of different gas sources can be more fully contacted, which helps to improve the uniformity and efficiency of gas mixing;

[0029] As a further embodiment of the above technical solution: dispersion hole 563 is provided with four, the shape of dispersion hole 563 cross section is set as rhombus, dispersion hole 563 is evenly and equidistantly distributed inside dispersion plate 562, dispersion hole 563 is circularly arrayed with the center of drive motor 57 main shaft one end as the axis, dispersion hole 563 passes through dispersion plate 562 and communicates with the inboard of hollow plate 54 and installation shell 51, rhombus dispersion hole 563 divides the gas entering hollow plate 54 into multiple small gas streams, increases the surface area of gas, and creates favorable conditions for subsequent mixing;

[0030] As a further implementation of the above technical solutions: four dispersion plates 562 are provided, the dispersion plates 562 are cross-sectionally provided in the shape of a sector, the arc-shaped side of the dispersion plates 562 is in close contact with the inner side of the hollow plate 54, and the dispersion plates 562 are circularly arrayed with the center of the main shaft of the driving motor 57 as the axis, so that the space in the hollow plate 54 can be fully utilized, the gas can be uniformly dispersed in all directions, and the situation of gas flow dead angle or local gas concentration being too high or too low is avoided.

[0031] As a further implementation of the above technical solutions: the mixing device 5 is fixedly connected to the upper end of the heating device 2, the connecting pipeline 53 passes through the upper end of the heating device 2 and communicates with the inner side of the heating device 2, and the hollow plate 54 is arranged on the inner side of the mounting shell 51, so that various gases can be mixed conveniently.

[0032] As a further implementation of the above technical solutions: a plurality of stirring holes 59 are provided, the stirring holes 59 are uniformly and equidistantly arranged on each blade of the fan 58, the stirring holes 59 are cross-sectionally triangular, the stirring holes 59 pass through the blades of the fan 58 and communicate with the inner side of the hollow plate 54, the stirring holes 59 not only allow the gas to pass through, but also further enhance the mixing effect of the gas, so that the various gases can be uniformly mixed, and the required gas composition ratio in the process is effectively achieved.

[0033] As a further implementation of the above technical solutions: four mounting grooves 52 and mounting blocks 55 are provided, the mounting grooves 52 and the mounting blocks 55 correspond to each other, the mounting grooves 52 and the mounting blocks 55 are clamped to each other, the mounting grooves 52 are symmetrically arranged on the inner side of the mounting shell 51, the mounting grooves 52 and the mounting blocks 55 are equal in shape, so that the hollow plate 54 can be stably mounted in the mounting shell 51, and the internal structure of the mixing device 5 can be kept stable during operation, and will not be loosened or shifted due to factors such as gas flow and fan 58 rotation.

[0034] Workflow: after energized by external lead, the low alloy high strength steel coil after cold rolling is placed on the conveying device 1, the conveying device 1 drives the steel along the predetermined track to the heating device 2 through its own transmission mechanism, the steel enters the heating device 2, the gas supply device 3 on both sides of the heating device 2 starts to work, the gas is transported to the mixing device 5 through the flange assembly 4, the mixing device 5 mixes and disperses the gas, first, the gas supplied by the gas supply device 3 enters the installation shell 51 of the mixing device 5 through the flange assembly 4, the installation groove 52 inside the installation shell 51 plays a guiding role for the entering gas, after the gas enters the hollow plate 54, it will pass through these dispersion holes 563, the dispersion holes 563 will divide the gas into multiple small gas streams, so that the distribution of the gas inside the hollow plate 54 is more uniform, and the contact area between different gas sources is increased, at the same time, the control system will control the driving motor 57 to start, the main shaft of the driving motor 57 drives the fan 58 to rotate, when the fan 58 rotates, on the one hand, it stirs the gas inside the hollow plate 54, so that the gas forms strong turbulence inside the hollow plate 54, and the gas from different sources is fully mixed under the action of turbulence, on the other hand, the gas can flow on both sides of the fan 58 through the stirring holes 59, further enhancing the mixing effect of the gas, ensuring that various gases can be uniformly mixed to achieve the required gas composition ratio of the process, after sufficient mixing and dispersion, the gas passes through the dispersion net 510 at the bottom of the hollow plate 54, the dispersion net 510 can further refine and uniformly mix the gas flow, so that the gas is more stable and uniform before output, finally, the uniformly mixed gas enters the inside of the heating device 2 through the connecting pipe 53 from the upper end of the heating device 2, providing a stable and uniform gas environment for the heating process of the steel, effectively reducing the oxidation and other adverse phenomena of the steel during the heating process, and ensuring that the quality and performance of the steel meet the requirements.

[0035] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A continuous annealing furnace for cold-rolled and annealed low-alloy high-strength steel, comprising a conveying device (1), a heating device (2) and a gas supply device (3) with a control system, characterized in that: One end of the conveying device (1) is fixedly connected with a heating device (2), the heating device (2) is provided with a gas supply device (3) on both sides, one end of the gas supply device (3) is fixedly connected with a flange assembly (4), the flange assembly (4) is fixedly connected with a mixing device (5) through bolts; The mixing device (5) includes a mounting shell (51) and a drive motor (57) with a protective shell, a mounting groove (52) is formed in the inner side of the mounting shell (51), a mounting block (55) is mounted in the inner side of the mounting groove (52), the mounting shell (51) is fixedly connected with a connecting pipeline (53) at the bottom, the mounting block (55) is fixedly connected with a hollow plate (54) on one side, the hollow plate (54) is fixedly connected with a dispersion device (56) on the inner side, the dispersion device (56) is fixedly connected with a drive motor (57) on the upper end, the main shaft of the drive motor (57) is fixedly connected with the inner side of a fan (58) through the dispersion device (56), the inner side of the blade of the fan (58) is provided with a stirring hole (59), and the bottom of the hollow plate (54) is fixedly connected with a dispersion net (510).

2. A continuous annealing furnace for cold rolled and annealed low alloy high strength steel according to claim 1, characterized in that: The outer side of the mixing device (5) is fixedly connected with the upper end of the heating device (2), the connecting pipeline (53) passes through the upper end of the heating device (2) and communicates with the inner side of the heating device (2), and the hollow plate (54) is arranged on the inner side of the mounting shell (51).

3. The continuous annealing furnace for cold rolled and annealed low alloy high strength steel according to claim 1, characterized in that: The dispersion device (56) includes a fixed support (561), the fixed support (561) is fixedly connected with a dispersion plate (562) between them, the inner side of the dispersion plate (562) is provided with a dispersion hole (563), and one end of the fixed support (561) is fixedly connected with the inner side of the hollow plate (54).

4. The continuous annealing furnace for cold rolled and annealed high strength low alloy steel of claim 1, wherein: The mounting groove (52) and the mounting block (55) are provided with four, the mounting groove (52) and the mounting block (55) are one-to-one corresponding, the mounting groove (52) and the mounting block (55) are clamped with each other, the mounting groove (52) is symmetrically arranged on the inner side of the mounting shell (51), and the shape of the mounting groove (52) and the mounting block (55) is equal.

5. A continuous annealing furnace for cold rolled and annealed low alloy high strength steel according to claim 1, characterized in that: The stirring hole (59) is provided with a plurality of stirring holes (59), the stirring holes (59) are evenly and equidistantly arranged on each blade of the fan (58), the shape of the cross section of the stirring hole (59) is triangular, and the stirring hole (59) passes through the blade of the fan (58) and communicates with the inner side of the hollow plate (54).

6. A continuous annealing furnace for cold rolled and annealed low alloy high strength steel according to claim 3, characterized in that: The dispersion plate (562) is provided with four, the shape of the cross section of the dispersion plate (562) is fan-shaped, the arc-shaped side of the dispersion plate (562) is tightly attached to the inner side of the hollow plate (54), and the dispersion plate (562) is circularly arrayed with the center of the main shaft of the drive motor (57) as the axis.

7. A continuous annealing furnace for cold rolled and annealed low alloy high strength steel according to claim 3, characterized in that: The dispersion holes (563) are provided with four, the dispersion holes (563) cross section are provided with the shape of diamond, the dispersion holes (563) are uniformly equidistantly distributed inside the dispersion plate (562), the dispersion holes (563) are circular array distribution with the center of the one end of the main shaft of the driving motor (57) as the axis, the dispersion holes (563) pass through the dispersion plate (562) and communicate with the hollow plate (54) and the inside of the mounting shell (51).

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