A fast cooling section sealing chamber for a continuous annealing furnace and its assembly process

Abstract

The present invention provides a sealing chamber for a rapid cooling section of a continuous annealing furnace and an assembly process thereof. The sealing chamber is a sealing chamber box structure, including an outer frame structure, an internal cavity unit, an axial end sealing cover unit, a side manhole cover unit and a gap sealing unit. The present invention reduces the gap around the sealing roller to the greatest extent, has high operability, and better ensures the sealing effect of the rapid cooling section. The hydrogen concentration of the rapid cooling section can reach 25-35% in the high hydrogen mode, and will not cause the hydrogen concentration in the front and rear furnaces of the rapid cooling section to exceed the standard. Thus, the production process requirements of the continuous annealing and galvanizing unit annealing furnaces are better met.

Description

Technical Field

[0001] The invention relates to the technical field of cold-rolled strip annealing, and in particular to a rapid cooling section sealing chamber for a continuous annealing furnace and an assembly process thereof. Background Art

[0002] At present, in the typical cold-rolled strip process, the annealing furnace is one of the core equipment in the continuous annealing and galvanizing unit. In the cold-rolled strip process, the annealing of the strip is an important link in the production. Specifically, the annealing process is to heat the strip to a certain temperature, keep it for a sufficient time, and then cool it at an appropriate speed to eliminate residual stress, improve mechanical properties, stabilize the size and adjust the crystal phase structure. The cooling rate in the cooling process is particularly critical. The function of the fast cooling section of the annealing furnace is to quickly cool the strip.

[0003] In order to increase the cooling rate of the strip in the rapid cooling section, the most widely used technology in the industry is high hydrogen cooling, which is to inject high-concentration H2 into the furnace of the rapid cooling section to make the H2 concentration in the furnace atmosphere above 20%. Hydrogen is a highly flammable and explosive gas. It is necessary to ensure that the sealed chamber of the rapid cooling section has good isolation capabilities to prevent hydrogen from overflowing from the rapid cooling section to the adjacent furnace chambers at both ends. Otherwise, the hydrogen concentration in the rapid cooling section will not meet the standard, thereby affecting the rate of the strip cooling zone and causing quality accidents of the unit products. At the same time, hydrogen overflow will cause the hydrogen concentration in the adjacent furnace chambers to exceed the standard, which will pose a major safety hazard.

[0004] Generally speaking, in the typical continuous annealing and galvanizing units of the current cold-rolled sheet and strip process, the sealing chamber of the annealing furnace rapid cooling section is mostly designed with a narrow gap sealing filled with refractory castables. The narrow gap sealing design of castable filling is to fill a large amount of refractory castables in the sealing chamber. The shape of the castables must fit the shape of the sealing roller to form a narrow gap to reduce the overflow of the atmosphere in the rapid cooling section. However, in actual use, it is found that there are many defects: (1) The casting accuracy of the special-shaped castables in this design is difficult to control, the gap is too large, and the sealing is poor; the gap is too small, which is easy to cause the sealing roller to get stuck; (2) Once the casting body is completed, it is difficult to change and adjust, which is not conducive to the installation and commissioning of the sealing chamber; (3) The castable is brittle and has no toughness. It is easy to break and loosen during the roller replacement process, which is easy to cause problems such as poor sealing, sealing roller getting stuck, and slag falling to contaminate the sheet and strip; (4) The castable will powder and fall off after long-term use, causing surface quality accidents of the sheet and strip.

[0005] In order to solve the above problems, it is necessary to provide a reliable, practical and effective sealed chamber for the rapid cooling section of the annealing furnace of the continuous annealing and galvanizing unit. Summary of the invention

[0006] According to the above-mentioned technical problems that the casting accuracy of special-shaped castables in the castable filling narrow gap sealing design is difficult to control, the gap is too large, and the sealing is poor; the gap is too small, which is easy to cause the sealing roller to get stuck; once the casting body is completed, it is difficult to change and adjust, which is not conducive to the installation and debugging of the sealing chamber; the castable is brittle and has no toughness, and is easy to be damaged and loosened during the roller replacement process, which is easy to cause problems such as poor sealing, sealing roller getting stuck, and slag falling to contaminate the plate and strip; the castable will powder and fall off after long-term use, causing surface quality accidents of the plate and strip, and provide a sealing chamber for the rapid cooling section of a continuous annealing furnace and an assembly process thereof.

[0007] The technical means adopted by the present invention are as follows:

[0008] A sealing chamber for a rapid cooling section of a continuous annealing furnace, which is a sealed chamber box structure, comprising: an outer frame structure, an inner cavity unit, an axial end sealing cover unit, a side manhole cover unit and a gap sealing unit;

[0009] The external frame structure is welded from a plurality of steel plates, and the upper and lower surfaces thereof are respectively provided with sealed chamber inlet and outlet channel interfaces for docking the furnace; the front and rear sides of the external frame structure are provided with manhole flanges, and the left and right end faces are provided with end face flange holes, and the flange holes are used for drawing and installing the sealed chamber;

[0010] The internal cavity unit is a cavity structure formed by a plurality of welded steel plates. When viewed from the end face, the entire sealing chamber inner cavity is divided into a plurality of cavities to form a plate strip channel and two sealing roller installation positions;

[0011] The shaft end sealing cover units are provided with two, which are respectively connected with the two flange holes on the steel plates at both ends of the external frame structure; the two shaft end sealing cover units are also connected with the two sides of the two sealing rollers, and each shaft end sealing cover unit is provided with two through holes for the roller shafts of the two sealing rollers to pass through;

[0012] The side manhole cover unit is provided with two pieces, which are matched and connected with the manhole flange on the external frame structure;

[0013] The gap sealing unit is connected to the external frame structure and is placed under the roller bodies of the two sealing rollers.

[0014] Further, the external frame structure is a rectangular parallelepiped structure, including an upper frame on the upper side of the sealed chamber and a lower frame on the lower side of the sealed chamber;

[0015] The upper frame includes a steel plate five, two steel plates seven, a steel plate three, and two steel plates eight, two steel plates six and two steel plates four vertically and airtightly welded to the steel plate three. The steel plates four, six and eight are welded in sequence from the inside to the outside, wherein the two steel plates four are welded at intervals in the middle of the steel plate three, the two steel plates six are respectively welded on the outsides of the two steel plates four, and the two steel plates eight are respectively welded on the two ends of the steel plate three; the steel plate five is sealed and welded with the steel plates four and six, and the steel plate seven is sealed and welded with the steel plates six and eight; after sealing, the upper side cavity one, cavity two, cavity three and cavity four of the sealed chamber are formed in sequence; the upper side cavity one, cavity two, cavity three and cavity four of the sealed chamber constitute the welded part one assembled by the sealed chamber;

[0016] The lower frame includes a steel plate 10, two steel plates 7, a steel plate 12, and two steel plates 11, two steel plates 9, and two steel plates 8 vertically and airtightly welded to the steel plate 12. The steel plates 11, 9, and 8 are welded in sequence from the inside to the outside, wherein the two steel plates 11 are welded at intervals in the middle of the steel plate 12, the two steel plates 9 are respectively welded on the outsides of the two steel plates 11, and the two steel plates 8 are respectively welded on the two ends of the steel plate 12; the steel plate 10 is sealed and welded with the steel plates 9 and 11, and the steel plate 7 is sealed and welded with the steel plates 8 and 9; after sealing, the cavity 5, cavity 6, cavity 7, and cavity 8 on the lower side of the sealed chamber are formed in sequence, and the cavity 5 and cavity 1 are located on the same side;

[0017] The left and right ends of the external frame structure are welded with steel plates 1 in an airtight manner. The lower cavity 5, cavity 6, cavity 7, cavity 8 and steel plate 1 of the sealed chamber constitute welded parts 2 for assembling the sealed chamber. The welded parts 1 and the welded parts 2 are assembled and welded by airtight welding to form a sealed chamber frame 1. There is a cavity 9 between the welded parts 1 and 2.

[0018] Two steel plates 2 with end face flanges are welded to the two ends of the sealed chamber frame 1, and the steel plate 2 is vertically and airtightly welded with the steel plate 3, the steel plate 8, and the steel plate 12 to form the sealed chamber frame 2;

[0019] The two end face sealing cover units are connected to the second steel plate in the second sealing chamber frame by bolts and gaskets to form a sealing chamber frame;

[0020] The two side manhole cover units are respectively installed on the two side manhole flanges of the frame two by bolts, and a gasket one is installed to achieve the sealing of the manhole.

[0021] Furthermore, the external frame structure is also provided with angle steels and supports, the angle steels include 4 pieces of angle steels 1, 4 pieces of angle steels 2, 4 pieces of angle steels 3 and 4 pieces of angle steels 4, 4 pieces of angle steels 1 of different lengths are airtightly welded on the lower surface of the steel plate 12 to form a lower mounting flange of the sealed chamber, which is used to dock with the furnace on the inlet side of the sealed chamber; 4 pieces of angle steels 4 of different lengths are airtightly welded on the upper surface of the steel plate 3 to form an upper mounting flange of the sealed chamber, which is used to dock with the furnace on the outlet side of the sealed chamber; the 4 pieces of angle steels 2 and 4 pieces of angle steels 3 are airtightly welded on the steel plates 8 on both sides;

[0022] The support includes support one and support two welded to the end of the external frame structure, which are used for installation and fixation of the sealing chamber of the fast cooling section, and each support is connected to the steel structure on the furnace by bolts.

[0023] Furthermore, the shaft end sealing cover unit comprises a round long plate end cover flange, a steel ring and a special-shaped metal graphite filler body, the round long plate end cover flange is a flat plate structure with a square middle and arc-shaped ends, and a circle of bolt holes are evenly distributed on its outer edge, which is used to match the end face flange holes on the second steel plate at both ends of the external frame structure, and is connected by a first bolt and a second gasket (sealing gasket); two round long holes are provided on the round long plate end cover flange, which are respectively the through holes of the two sealing roller shafts; the edge of each round long hole is evenly distributed with a circle of threaded through holes, and the threaded through holes are matched and connected with second bolts for installing the flexible expansion joint of the sealing roller shaft;

[0024] The steel ring is vertically and discontinuously welded on the round plate end cover flange, and the steel ring is surrounded by a rectangular steel plate along the inner side of the first bolt of the round plate end cover flange to form a cavity, and the two end parts of the steel ring are located between the first bolt and the second bolt;

[0025] The special-shaped metal graphite filler body is integrally formed from metal graphite powder and is embedded in the cavity of the steel ring through anchor nails welded on the end cover flange of the round long plate; the outer ring shape of the special-shaped metal graphite filler body matches the inner side of the cavity of the steel ring, and the inner ring shape fits the bell mouth of the sealing roller, with a small gap between the bell mouth.

[0026] Furthermore, the side manhole cover unit includes a method flange, a surrounding plate, refractory fiber cotton, a number of anchoring nails, a sealing plate and a handle. The method flange is made of steel plate, and bolt holes are evenly distributed on the outer edge for installation in coordination with the manhole flange of the external frame structure through bolts; the surrounding plate is welded to the front side of the method flange, and the cavity contour formed is smaller than the manhole on the steel plate eight of the external frame structure; the number of anchoring nails are vertically welded to the front side of the method flange and are located in the cavity of the surrounding plate; refractory fiber cotton is stacked layer by layer in the cavity of the surrounding plate, with no gap between the refractory fiber cotton and the surrounding plate, and a number of anchoring nails are interspersed with multiple layers of refractory fiber cotton; the sealing plate is fixed to the top of the anchoring nails by nuts and gaskets and in cooperation with the anchoring nails, so as to enclose the refractory fiber cotton inside; the surrounding plate, refractory fiber cotton, anchoring nails and sealing plate constitute a thermal insulation layer; the handle is welded to the outer back side of the method flange.

[0027] Furthermore, the gap sealing unit comprises a gap adjustment plate under the roller body and a roller body bell-mouth sealing triangle plate, and the gap adjustment plate under the roller body is provided with two pieces, connected to the sealing chamber frame 2, and respectively placed under the roller bodies of the two sealing rollers;

[0028] The sealing triangle plate is a welded part, which is welded and installed at both ends of the lower channel of the sealing chamber strip steel near the bell mouth of the sealing roller, wherein the lower part of the sealing triangle plate is welded between two steel plates eleven; the upper part of the sealing triangle plate is in the shape of an isosceles triangle, with arcs on both sides, the arcs fit the arc of the sealing roller body, and have a small gap.

[0029] Furthermore, the gap adjustment plate under the roller body is made of a metal graphite plate laid on one side of a rectangular steel plate;

[0030] Two groups of bolt top screws are installed on both sides of the steel plate 10, and each group of bolt top screws includes at least two roller body sealing plate adjusting screws, and the tops of the roller body sealing plate adjusting screws are in contact with the bottoms of the gap adjusting plates under the roller body, so as to adjust the height of the gap adjusting plates under the roller body;

[0031] Two rectangular holes are formed on both sides of the steel plate 12, and the height of the clearance adjustment plate under the roller body can be adjusted by rotating the bolts through the rectangular holes.

[0032] The present invention also provides an assembly process for a sealing chamber of a rapid cooling section of a continuous annealing furnace, comprising the following steps:

[0033] S1. Use one piece of steel plate 3 as the bottom, weld two pieces of steel plate 8, two pieces of steel plate 6, and two pieces of steel plate 4 according to the size, and ensure that the last six steel plates are perpendicular to steel plate 3 and welded airtightly;

[0034] S2. Use one steel plate five and two steel plates seven for sealing to form cavity one, cavity two, cavity three and cavity four on the upper side of the sealed chamber; cavity one, cavity two, cavity three and cavity four on the upper side of the sealed chamber constitute welded part one for assembling the sealed chamber;

[0035] S3, use another steel plate 12 as the bottom, vertically weld two steel plates 11, vertically weld two steel plates 9, and weld them airtightly;

[0036] S4, using one steel plate ten and two steel plates seven for sealing welding to form cavity five, cavity six, cavity seven, and cavity eight at the lower side of the sealed chamber;

[0037] S5. Weld the two steel plates at the left and right ends to make them airtight;

[0038] S6, the sealed chamber lower cavity 5, cavity 6, cavity 7, cavity 8 and steel plate 1 constitute the sealed chamber assembly welded part 2;

[0039] S7, assembling and welding the welding piece 1 and the welding piece 2, and performing airtight welding to form a sealed chamber frame 1; a cavity 9 is provided between the welding piece 1 and the welding piece 2;

[0040] Welding two steel plates 2 with end face flanges to the two ends of the sealed chamber frame 1, and vertically and airtightly welding the steel plates 2, 8 and 12 to form the sealed chamber frame 2;

[0041] S8. Vertically weld a steel ring on each of the two round long plate end cover flanges, perform intermittent welding, and then embed and install the special-shaped metal graphite filler in the steel ring cavity to form a shaft end sealing cover unit;

[0042] S9, connecting the two shaft end sealing cover units and the second upper steel plate of the second sealing chamber frame through the first bolts and the second gasket to form the second sealing chamber frame;

[0043] S10, installing roller body sealing plate adjusting screws to adjust the height of the roller body sealing plate, and simultaneously placing two roller body lower gap adjustment plates into the second sealing chamber frame;

[0044] S11, using a square flange as a base, welding a certain number of anchor nails on it, and calibrating the anchor nails to ensure that they are perpendicular to the square flange;

[0045] S12. Weld the enclosure. The cavity profile formed by the enclosure is slightly smaller than the manhole on the steel plate 8 to ensure that it can be installed in a small gap insertion manner.

[0046] S13, stacking refractory fiber wool layer by layer in the enclosure cavity, the stacking filling thickness of the fiber wool reaches the required size requirement, and there should be no gap between the fiber wool and the enclosure to ensure its thermal insulation capacity;

[0047] S14, install the sealing plate, fix it with nuts, pads and anchor nails, weld the handle, and complete the assembly of the side manhole cover unit;

[0048] S15, completing the assembly of the second side manhole cover unit according to steps S11 to S14;

[0049] S16, installing two side manhole cover units on the two side manhole flanges of the frame 2 respectively, installing gasket 1 to ensure the sealing of the manhole, and bolting them together;

[0050] S17, the above parts have completed the splicing and assembly of the sealed room outer frame structure, the internal cavity unit, the shaft end sealing cover unit, the side manhole cover unit, and the gap sealing unit to obtain the sealed room box body;

[0051] S18, welding four angle steels of different lengths to the lower surface of the steel plate 12 at the lower part of the sealed chamber body, and welding them airtightly to form a lower mounting flange of the sealed chamber for docking with the furnace at the inlet side of the sealed chamber;

[0052] S19, welding four angle steels of different lengths to the upper surface of the third steel plate on the upper part of the sealed chamber box body, and welding them airtightly to form an upper mounting flange of the sealed chamber for docking with the furnace at the outlet side of the sealed chamber;

[0053] S20, welding 4 pieces of angle steel 3 and 4 pieces of angle steel 2 to the steel plates 8 on both sides of the sealed chamber box body, and performing airtight welding to effectively increase the structural strength and stability of the sealed chamber;

[0054] S21, respectively welding support 1 and support 2 at the ends of the sealed chamber box, wherein the supports are load-bearing supports for the entire sealed chamber and are connected to the steel structure on the furnace by bolts;

[0055] S22. The installation of the sealing triangle plate is carried out during the debugging phase. After the entire sealing chamber is installed in place and the sealing roller is installed, adjustment and positioning are carried out.

[0056] Compared with the prior art, the present invention has the following advantages:

[0057] 1. The fast cooling section sealed chamber for a continuous annealing furnace and its assembly process provided by the present invention have an external frame structure that is completely welded with light steel, have a simple manufacturing process, high structural strength, a simple installation method, and convenient adjustment of structural dimensions, and can adapt to the renovation and installation of continuous annealing and galvanizing line annealing furnaces of various specifications in the industry.

[0058] 2. The fast cooling section sealing chamber for a continuous annealing furnace provided by the present invention and its assembly process, the inner cavity of the sealing chamber is divided into 9 longitudinal cavities by steel plates, and is not filled with any refractory castables, which solves the problems of easy breakage and loosening of the castable during roller replacement, which can easily cause poor sealing, sealing roller jamming, slag pollution of the plate and strip, and the problem of powdering and falling of the castable after long-term use. At the same time, the total weight is reduced by 50%, the external frame weighing is reduced, and the risk of frame deformation is reduced.

[0059] 3. The fast cooling section sealing chamber and assembly process for the continuous annealing furnace provided by the present invention adopts metal graphite molding filling for the shaft end sealing cover unit, which also reduces the weight of the sealing chamber end cover and facilitates disassembly and assembly. Graphite has the characteristics of high temperature resistance, low density, small thermal expansion coefficient, and high brittleness, and is easy to mold and has high precision. The gap between the end cover and the bell mouth of the sealing roller can be effectively controlled, and the amount of atmosphere overflow in the fast cooling section furnace can be effectively reduced. At the same time, the metal graphite filling replaces the refractory castable filling, which solves the slag problem caused by the pulverization and loosening of the castable. At the same time, the metal graphite can be freely ground by rotating the sealing roller, so that the metal graphite cavity fits as much as possible without causing the sealing roller to get stuck.

[0060] 4. The invention provides a fast cooling section sealing chamber for a continuous annealing furnace and its assembly process. The gap sealing unit is designed with a roller body under-gap adjustment plate laid with graphite, which can effectively insulate and reduce the thermal deformation of the adjustment plate, which is conducive to further reducing the gap under the roller body and reducing the amount of atmosphere overflow in the fast cooling section. At the same time, the height of the sealing plate can be adjusted at will by rotating the top screw, thereby improving the adjustment ability and control accuracy of the gap under the roller body. The design of the sealing triangle plate at the bell mouth of the roller body effectively blocks the atmosphere in the furnace of the fast cooling section from overflowing through the bell mouth of the sealing roller.

[0061] In summary, the present invention reduces the gap around the sealing roller to the greatest extent, has high operability, and better ensures the sealing effect of the rapid cooling section. The hydrogen concentration in the rapid cooling section can reach 25-35% in the high hydrogen mode, and will not cause the hydrogen concentration in the furnace before and after the rapid cooling section to exceed the standard. Thus, the production process requirements of the annealing furnace of the continuous annealing and galvanizing unit can be better met.

[0062] In summary, the application of the technical solution of the present invention can solve the problems in the prior art of the casting accuracy of special-shaped castings in the casting material filling narrow gap sealing design, which is difficult to control, the gap is too large, and the sealing is poor; the gap is too small, which is easy to cause the sealing roller to get stuck; once the casting body is completed, it is difficult to change and adjust, which is not conducive to the installation and debugging of the sealing chamber; the casting is brittle and has no toughness. It is easy to be damaged and loose during the roller replacement process, which is easy to cause poor sealing, sealing roller sticking, slag falling and contamination of the plate and strip, etc.; the casting will powder and fall off after long-term use, causing the problem of surface quality accidents of the plate and strip.

[0063] Based on the above reasons, the present invention can be widely promoted in the fields of cold-rolled strip annealing and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0065] Figure 1 : It is the general assembly drawing of the sealed chamber of the present invention, wherein (a) is the main view, (b) is the top view, (c) is the cross-sectional view at AA in Figure (a), and (d) is the cross-sectional view at BB in Figure (a).

[0066] Figure 2 It is a cross-sectional view of the sealed chamber of the present invention.

[0067] Figure 3 It is a schematic diagram of the inner cavity of the sealed chamber of the present invention.

[0068] Figure 4 Schematic diagram of the end cover sealing cover unit of the present invention, wherein (a) is a top view, (b) is a cross-sectional view at AA in Figure (a), (c) is a cross-sectional view at BB in Figure (a), and (d) is a cross-sectional view at CC in Figure (a).

[0069] Figure 5 It is a schematic diagram of a side manhole cover unit of the present invention, wherein (a) is a top view, (b) is a front view, and (c) is a side view.

[0070] Figure 6 Schematic diagram of the gap adjustment plate under the roller body of the present invention, wherein (a) is the main view, (b) is the side view, and (c) is the cross-sectional view at AA in Figure (a).

[0071] Figure 7 Schematic diagram of the sealing triangle plate of the present invention, wherein (a) is the main view, (b) is the side view, and (c) is the top view.

[0072] Figure 8 It is a schematic diagram of some steel plates of the present invention, wherein (a) is steel plate one, (b) is the front view of steel plate two, (c) is the side view of steel plate two, (d) is steel plate three, (e) is the front view of steel plate eight, (f) is the side view of steel plate eight, (h) is the top view of steel plate eight, (i) is steel plate ten, and (j) is steel plate twelve.

[0073] In the figure: 1-1, steel plate 1; 1-3, steel plate 2; 1-4, gasket 1; 1-5, gasket 2; 1-7, side manhole cover unit; 1-8, shaft end sealing cover unit; 2-1, angle steel 1; 2-2, support 1; 2-3, angle steel 2; 2-4, support 2; 2-5, angle steel 3; 2-6, angle steel 4; 2-7, steel plate 3; 2-8, steel plate 4; 2-9, steel plate 5; 2-10, steel plate 6; 2-11, steel plate 7; 2-12, steel plate 8; 2-13, steel plate 9; 2-14, steel plate 10; 2-15, steel plate 11; 2-16, steel plate 12; 2-17, roller body seal Plate adjusting screw; 2-18, sealing triangle plate; 2-19, roller body lower clearance adjustment plate; 4-1, special-shaped metal graphite filler; 4-2, round long plate end cover flange; 4-3, steel ring; 5-1, enclosure; 5-2, anchor nail; 5-3, pad; 5-4, nut; 5-5, refractory fiber cotton; 5-6, sealing plate; 5-7, square flange; 5-8, handle; 6-1, metal graphite plate; 6-2, steel plate; 01, cavity one; 02, cavity two; 03, cavity three; 04, cavity four; 05, cavity five; 06, cavity six; 07, cavity seven; 08, cavity eight; 09, cavity nine.

[0074] Figure 1 In the figure, W4 is the width of the lower mounting flange of the sealing chamber; W5 is the overall width of the sealing chamber; W6 is the overall height of the sealing chamber; W7 is the length of the side manhole of the sealing chamber; W8 is the length of the steel channel of the sealing chamber; W9 is the length of the inner cavity of the sealing chamber; W10 is the overall length of the sealing chamber;

[0075] Figure 2 In the figure, W1 is the width of the adjustment channel of the gap adjustment plate under the roller body; W2 is the height of the manhole on the side of the sealing chamber; W3 is the width of the strip steel channel in the sealing chamber; C01 is the strip steel running line; C02 is the strip steel running direction;

[0076] Figure 4 In the figure, R1 is the radius of the end of the round hole; R2 is the inner radius of the special-shaped graphite filler; R3 is the inner radius of the special-shaped graphite filler; W12 is the height of the steel ring; W13 is the diameter of the sealing roller shaft hole; W14 is the height of the flange of the end cover of the round plate; W15 is the height of the circular hole of the inner cavity of the special-shaped graphite filler; W16 is the length of the steel ring; W17 is the length of the circular hole of the inner cavity of the special-shaped graphite filler; W18 is the length of the flange of the end cover of the round plate;

[0077] Figure 5 Among them, W19 is the length of the square flange; W20 is the width of the square flange; W21, W22, W23, W24, and W25 are the assembly dimensions of the insulation layer of the side manhole cover unit;

[0078] Figure 6 In the figure, W26, W27, W28 and W29 are the dimensions of the gap adjustment plate under the roller body;

[0079] Figure 7 In the figure, R4 is the arc radius of the sealing triangle plate; W30 is the width of the sealing triangle plate mounting seat; and W31 is the height of the sealing triangle plate mounting seat. DETAILED DESCRIPTION

[0080] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0081] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0082] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0083] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0084] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0087] The invention provides a rapid cooling section sealing chamber for a continuous annealing furnace, and relates to a rapid cooling section sealing chamber for a continuous annealing and galvanizing unit annealing furnace in a cold rolling strip process, and specifically relates to a rapid cooling section inlet and outlet sealing chamber that can effectively isolate the annealing furnace furnace atmosphere.

[0088] The fast cooling section sealing chamber comprises an outer frame structure, an internal cavity unit, an axial end sealing cover unit, a side manhole cover unit, and a gap sealing unit.

[0089] The external frame structure is welded by angle steel, steel plate and support, and has a rectangular structure. The upper and lower surfaces are respectively provided with sealing chamber inlet and outlet channel interfaces for connecting to the furnace; manhole flanges are arranged on the front and rear sides to facilitate the inspection of the sealing chamber, the inspection and replacement of the sealing roller, and the cleaning of the sealing chamber during maintenance; end face flange holes and supports are arranged on the left and right end faces, the flange holes are used for the extraction and installation of the sealing chamber, and the supports are used for the installation and fixation of the sealing chamber.

[0090] The internal cavity unit is a cavity structure formed by welding multiple steel plates of different specifications. Viewed from the end face, the entire sealing chamber inner cavity is divided into 9 cavities. Through the reasonable distribution of the cavities, plate and strip channels and sealing roller installation positions are formed. At the same time, the cavity design also reduces the overall weight of the sealing chamber to the greatest extent.

[0091] The shaft end sealing cover unit comprises a round long plate end cover flange, a steel ring, and a special-shaped metal graphite filler. The round long plate end cover flange is a long flange with arc-shaped ends, and bolt holes are evenly distributed on the flange edge, which matches the end face flange holes on the steel plate 2 at both ends of the external frame structure, and is connected and installed with a gasket 2 (sealing pad) by bolts.

[0092] Preferably, two oblong holes are distributed on the oblong plate end cover flange, which are respectively the holes through which the roller shafts of the two sealing rollers pass. Meanwhile, the oblong holes facilitate the lateral movement of the sealing rollers, thereby realizing the opening and closing action of the sealing rollers.

[0093] Preferably, threaded through holes are evenly distributed on the edge of the circular long hole, which are used to install the flexible expansion joint of the sealing roller shaft and are connected by bolts.

[0094] The steel ring is formed by a rectangular steel plate along the inner side of the round long plate end cover flange bolt to form a cavity, and is installed on the inner side of the round long plate end cover flange by welding.

[0095] The special-shaped metal graphite filler is integrally formed from preferred metal graphite powder, the inner ring shape of which fits the bell mouth of the sealing roller with a small gap therebetween, and the outer ring shape matches the inner cavity of the steel ring.

[0096] Preferably, the metal graphite has the characteristics of high temperature resistance, low density, small thermal expansion coefficient, high brittleness, and is easy to shape with high precision.

[0097] Preferably, the special-shaped metal graphite filler is embedded in the steel ring cavity through anchoring nails welded on the round long plate end cover flange.

[0098] The side manhole cover unit has a handle, a flange, a panel, refractory fiber cotton, an anchoring nail, and a sealing plate. The handle is welded to the outside of the flange to facilitate the installation of the manhole cover. The flange is made of steel plate, and bolt holes are evenly distributed on the edge. It is installed with the manhole flange in the above-mentioned external frame structure through bolt connection. The panel, refractory fiber cotton, anchoring nail, and sealing plate constitute the thermal insulation layer of the manhole cover. The anchoring nail is used to fix the refractory fiber cotton. The panel and the sealing plate are used to seal the exposed part of the fiber cotton to prevent the fiber cotton from being damaged or falling off. The panel and the sealing plate are fixed by welding.

[0099] The gap sealing unit comprises a gap adjustment plate under the roller body and a sealing triangle plate for the bell mouth of the roller body. The gap adjustment plate under the roller body is made of a rectangular steel plate 6-2 with a metal graphite plate 6-1 laid on one side, a total of 2 pieces, which are respectively placed under the roller bodies of the two sealing rollers. The sealing triangle plate for the bell mouth of the roller body is a welded part, in the shape of an isosceles triangle, with arcs on both sides, welded and installed at both ends of the lower channel of the strip steel in the sealing chamber near the bell mouth of the sealing roller, and the arc fits the arc of the roller body of the sealing roller with a small gap.

[0100] The technical solution to the above problem is to design an invented sealed chamber for the rapid cooling section of the annealing furnace in the cold-rolled strip processing line. Figure 1 The entire sealed chamber external frame structure shown is completely welded with light steel, with simple manufacturing process, high structural strength, simple installation method, and convenient adjustment of structural dimensions. It can adapt to the renovation and installation of various specifications of continuous annealing and galvanizing line annealing furnaces in the industry.

[0101] like Figure 3 As shown, the inner cavity of the sealing chamber is divided into 9 longitudinal cavities by steel plates, without any refractory castable filling, which solves the problems of castable being easily damaged and loosened during roller changing, which may easily cause poor sealing, sealing roller jamming, slag falling and contamination of plate and strip, as well as the problem of powdering and falling of castable after long-term use.

[0102] like Figure 3 As shown, the inner cavity of the sealed chamber is divided into 9 longitudinal cavities by steel plates. Compared with the traditional sealed chamber, the total weight is reduced by 50%, the weight of the external frame is reduced, and the risk of frame deformation is reduced.

[0103] like Figure 4 As shown, the shaft end sealing cover unit adopts metal graphite molding filling, which also reduces the weight of the sealing chamber end cover and facilitates disassembly and assembly.

[0104] The metal graphite has the characteristics of high temperature resistance, low density, low thermal expansion coefficient, high brittleness, and is easy to shape and has high precision. It can effectively control the gap between the end cover and the bell mouth of the sealing roller, and can effectively reduce the amount of atmosphere overflow in the rapid cooling section furnace.

[0105] The metal graphite filling replaces the refractory castable filling, solves the slag problem caused by the pulverization and loosening of the castable, and can freely grind the metal graphite through the rotation of the sealing roller, so that the inner cavity of the metal graphite fits as closely as possible without causing the sealing roller to get stuck.

[0106] like Figure 6 , Figure 7 As shown, the gap adjustment plate under the roller body designed with the gap sealing unit is paved with graphite, which can effectively insulate and reduce the thermal deformation of the adjustment plate, which is conducive to further reducing the gap under the roller body and reducing the amount of atmosphere overflow in the rapid cooling section.

[0107] like Figure 2As shown, at the same time, the steel plate 2-14 on the lower side of the sealing plate is designed with 4 bolt top screws (i.e., roller body sealing plate adjusting screws 2-17), and the steel plate 2-16 is provided with a rectangular hole, through which the top screw can be rotated to adjust the height of the sealing plate at will, thereby improving the adjustment capability and control accuracy of the gap on the lower side of the roller body.

[0108] like Figure 7 As shown, the sealing triangle plate of the drum bell mouth can effectively prevent the furnace atmosphere in the rapid cooling section from escaping through the neck gap of the drum bell mouth of the sealing roller.

[0109] like Figures 1 to 6 As shown, the sealing chamber for the rapid cooling section of the continuous annealing furnace specifically includes: steel plate 1-1, steel plate 2 1-3, gasket 1-4, gasket 2 1-5, side manhole cover unit 1-7, shaft end sealing cover unit 1-8, angle steel 1 2-1, support 1 2-2, angle steel 2 2-3, support 2 2-4, angle steel 3 2-5, angle steel 4 2-6, steel plate 3 2-7, steel plate 4 2-8, steel plate 5 2-9, steel plate 6 2-10, steel plate 7 2-11, steel plate 8 2-12, steel plate 9 2-13, steel plate ten 2-14, steel plate eleven 2-15, steel plate twelve 2-16, roller body sealing plate adjusting screw 2-17, sealing triangle plate 2-18, roller body lower gap adjustment plate 2-19, special-shaped metal graphite filler 4-1, round long plate end cover flange 4-2, steel ring 4-3, enclosure 5-1, anchor nail 5-2, gasket 5-3, nut 5-4, refractory fiber cotton 5-5, sealing plate 5-6, square flange 5-7, handle 5-8, metal graphite plate 6-1, steel plate 6-2.

[0110] The external frame structure is a rectangular parallelepiped structure, including an upper frame on the upper side of the sealed chamber and a lower frame on the lower side of the sealed chamber; the upper frame includes a steel plate five 2-9, two steel plates seven 2-11, a steel plate three 2-7, and two steel plates eight 2-12, two steel plates six 2-10 and two steel plates four 2-8 vertically and airtightly welded to the steel plate three 2-7. The steel plates four 2-8, six 2-10 and eight 2-12 are welded in sequence from the inside to the outside, among which two steel plates four 2-8 are welded at intervals in the middle of the steel plate three 2-7. , two steel plates 6 2-10 are welded to the outside of two steel plates 4 2-8 respectively, and two steel plates 8 2-12 are welded to the two ends of steel plate 3 2-7 respectively; steel plate 5 2-9 is sealed and welded with steel plate 4 2-8 and steel plate 6 2-10, and steel plate 7 2-11 is sealed and welded with steel plate 6 2-10 and steel plate 8 2-12; after sealing, the upper side cavity 1 01, cavity 2 02, cavity 3 03 and cavity 4 04 of the sealed chamber are formed in sequence; the upper side cavity 1 01, cavity 2 02, cavity 3 03 of the sealed chamber are formed in sequence , the cavity four 04 constitutes a welded part assembled in the sealed chamber; the lower frame includes a steel plate ten 2-14, two steel plates seven 2-11, a steel plate twelve 2-16, and two steel plates eleven 2-15, two steel plates nine 2-13 and two steel plates eight 2-12 vertically and airtightly welded to the steel plate twelve 2-16. The steel plates eleven 2-15, the steel plates nine 2-13 and the steel plates eight 2-12 are welded in sequence from the inside to the outside, among which the two steel plates eleven 2-15 are welded at intervals in the middle of the steel plate twelve 2-16, and the two steel plates are welded at intervals in the middle of the steel plate twelve 2-16. Plate nine 2-13 is welded to the outside of two steel plates eleven 2-15, and two steel plates eight 2-12 are welded to the two ends of steel plate twelve 2-16; steel plate ten 2-14 is sealed and welded with steel plate nine 2-13 and steel plate eleven 2-15, and steel plate seven 2-11 is sealed and welded with steel plate eight 2-12 and steel plate nine 2-13; after sealing, cavity five 05, cavity six 06, cavity seven 07 and cavity eight 08 on the lower side of the sealed chamber are formed in sequence, and cavity five 05 and cavity one 01 are located on the same side.

[0111] Specifically, in an exemplary embodiment of the present invention, a preferred sealing chamber assembly and installation process can ultimately obtain a high-precision sealing chamber.

[0112] In this embodiment, Figure 2 As shown, a steel plate three 2-7 is used as the bottom, two steel plates eight 2-12 are welded according to the size, two steel plates six 2-10 are welded, and two steel plates four 2-8 are welded, and it is ensured that the last six steel plates are perpendicular to the steel plate three 2-7 and welded airtightly.

[0113] In this embodiment, Figure 2 As shown, a steel plate 5 2-9 and two steel plates 7 2-11 are used for sealing to form a Figure 3 The sealed chamber shown has cavity one 01, cavity two 02, cavity three 03, and cavity four 04 on the upper side.

[0114] The upper cavity 1 01, cavity 2 02, cavity 3 03 and cavity 4 04 of the sealed chamber constitute a welded part 1 for assembling the sealed chamber.

[0115] In this embodiment, Figure 2 As shown, a steel plate 12 2-16 is used as the bottom, two steel plates 11 2-15 are vertically welded, two steel plates 9 2-13 are vertically welded, and two steel plates 8 2-12 are vertically welded for airtight welding.

[0116] In this embodiment, Figure 2 As shown, a steel plate 10 2-14 and two steel plates 7 2-11 are used for sealing welding to form a Figure 3 The sealed chamber shown has cavity five 05, cavity six 06, cavity seven 07, and cavity eight 08 on the lower side.

[0117] In this embodiment, Figure 1 As shown, two steel plates 1-1 are welded at a preferred size position and are airtightly welded.

[0118] The sealed chamber assembly comprises a welded part 2 which is composed of a lower side cavity 5 05, a cavity 6 06, a cavity 7 07, a cavity 8 08 and a steel plate 1-1.

[0119] In this embodiment, Figure 2 As shown, the welding piece 1 and the welding piece 2 are assembled and welded, and the welding is airtightly welded to form a sealed chamber frame 1. There is a cavity 909 between the welding piece 1 and the welding piece 2.

[0120] In this embodiment, two steel plates 1-3 with end flanges are welded to the two ends of a sealed chamber frame. The steel plate 1-3 is vertically and airtightly welded with the steel plate 2-7, the steel plate 8-12, and the steel plate 12-16 to form a sealed chamber frame 2.

[0121] In this embodiment, Figure 4 As shown, a steel ring 4-3 is vertically welded on each of the two round long plate end cover flanges 4-2, and the welding is intermittent, and then the preferred special-shaped metal graphite filler 4-1 is embedded and installed in the cavity of the steel ring 4-3 to form an end face sealing cover unit (axial end sealing cover unit 1-8).

[0122] In this embodiment, Figure 1 As shown, Figure 4 The two end face sealing cover units shown are connected to the upper steel plate 1-3 of the sealing chamber frame 2 by bolts, and the gasket 1-5 is installed to form a sealing chamber frame.

[0123] In this embodiment, Figure 2 As shown in the figure, install the roller body sealing plate adjusting screw 2-17 to adjust the height of the roller body sealing plate. Figure 6 The roller body lower gap adjustment plate 2-19 shown is placed in the sealing chamber frame 2.

[0124] In this embodiment, Figure 5 As shown, a method flange 5-7 is used as the base, and a certain number of anchoring nails 5-2 are welded on it according to a preferred distribution method. The anchoring nails must be corrected to ensure that they are perpendicular to the method flange.

[0125] In this embodiment, Figure 5 As shown, when welding the enclosure 5-1, the cavity profile formed by the enclosure needs to be slightly smaller than the manhole on the steel plate 82-12 to ensure that it can be installed in a small gap insertion manner.

[0126] In this embodiment, Figure 5 As shown, fire-resistant fiber cotton 5-5 is stacked layer by layer in the enclosure cavity, and the stacking filling thickness of the fiber cotton needs to meet the dimensional requirements of the thickness of the W23 fiber cotton insulation layer. There should be no gap between the fiber cotton and the enclosure to ensure its thermal insulation capacity.

[0127] In this embodiment, Figure 5 As shown, the sealing plate 5-6 is installed and fixed by the nut 5-4, the pad 5-3 and the anchor nails, and the handle 5-8 is welded at the preferred position to complete the assembly of the side manhole cover unit.

[0128] In this embodiment, the assembly of the second side manhole cover unit is completed according to the method.

[0129] In this embodiment, Figure 1 As shown, the two side manhole cover units are respectively installed on the two side manholes of the frame 2, and gaskets 1-4 are installed to ensure the sealing of the manholes, and bolted together.

[0130] The above parts have completed the splicing and assembly of the sealed room outer frame structure, the internal cavity unit, the shaft end sealing cover unit, the side manhole cover unit, and the gap sealing unit to obtain the sealed room box body.

[0131] In this embodiment, Figure 2 As shown, four angle steels 2-1 of different lengths are preferably welded on the lower surface of the lower steel plate 12-16 of the sealed chamber body, and are welded airtightly to form a lower mounting flange of the sealed chamber for docking with the furnace at the inlet side of the sealed chamber.

[0132] In this embodiment, Figure 2 As shown, four angle steels 2-6 of different lengths are preferably welded on the upper surface of the upper steel plate 2-7 of the sealed chamber body, and are welded airtightly to form an upper mounting flange of the sealed chamber for docking with the furnace at the outlet side of the sealed chamber.

[0133] In this embodiment, Figure 2 As shown, four angle steels three 2-5 and four angle steels two 2-3 of preferred sizes are welded on the steel plates eight 2-12 on both sides of the sealed chamber box body, and the airtight welding can effectively increase the structural strength and stability of the sealed chamber.

[0134] In this embodiment, Figure 1 , Figure 2 As shown, support 1 2-2 and support 2-4 are welded at preferred positions at the ends of the sealed chamber box body, respectively. The supports are load-bearing supports for the entire sealed chamber and are connected to the steel structure on the furnace by bolts.

[0135] In this embodiment, Figure 2 The installation of the sealing triangle plate 2-18 shown should be carried out during the commissioning phase, and the entire sealing chamber needs to be installed in place and the sealing roller installed before adjustment and positioning.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealed chamber for a rapid cooling section of a continuous annealing furnace, characterized in that: It is a sealed chamber box structure, comprising: an external frame structure, an internal cavity unit, an axial end sealing cover unit (1-8), a side manhole cover unit (1-7) and a gap sealing unit; The external frame structure is welded from a plurality of steel plates, and the upper and lower surfaces thereof are respectively provided with sealed chamber inlet and outlet channel interfaces for docking the furnace; the front and rear sides of the external frame structure are provided with manhole flanges, and the left and right end faces are provided with end face flange holes, and the flange holes are used for drawing and installing the sealed chamber; The internal cavity unit is a cavity structure formed by a plurality of welded steel plates. When viewed from the end face, the entire sealing chamber inner cavity is divided into a plurality of cavities to form a plate strip channel and two sealing roller installation positions; The shaft end sealing cover units (1-8) are provided with two, which are respectively connected to the flange holes on the steel plates (1-3) at both ends of the external frame structure; the two shaft end sealing cover units (1-8) are also connected to the two sides of the two sealing rollers, and each shaft end sealing cover unit (1-8) is provided with two through holes for the roller shafts of the two sealing rollers to pass through; The side manhole cover unit (1-7) is provided with two pieces, which are matched and connected with the manhole flange on the external frame structure; The gap sealing unit is connected to the external frame structure and is placed under the roller bodies of the two sealing rollers; The external frame structure is a rectangular parallelepiped structure, including an upper frame on the upper side of the sealed chamber and a lower frame on the lower side of the sealed chamber; The upper frame comprises a steel plate five (2-9), two steel plates seven (2-11), a steel plate three (2-7), and two steel plates eight (2-12), two steel plates six (2-10) and two steel plates four (2-8) vertically and airtightly welded to the steel plate three (2-7). The steel plates four (2-8), six (2-10) and eight (2-12) are welded in sequence from the inside to the outside, wherein the two steel plates four (2-8) are welded at intervals in the middle of the steel plate three (2-7), the two steel plates six (2-10) are respectively welded on the outsides of the two steel plates four (2-8), and the two steel plates Plate eight (2-12) is welded to the two ends of steel plate three (2-7) respectively; the steel plate five (2-9) is sealed and welded with steel plate four (2-8) and steel plate six (2-10); the steel plate seven (2-11) is sealed and welded with steel plate six (2-10) and steel plate eight (2-12); after sealing, the upper side cavity one (01), cavity two (02), cavity three (03) and cavity four (04) of the sealed chamber are formed in sequence; the upper side cavity one (01), cavity two (02), cavity three (03) and cavity four (04) of the sealed chamber constitute a welded part one of the sealed chamber assembly; The lower frame comprises a steel plate ten (2-14), two steel plates seven (2-11), a steel plate twelve (2-16), and two steel plates eleven (2-15), two steel plates nine (2-13) and two steel plates eight (2-12) vertically and airtightly welded to the steel plate twelve (2-16). The steel plate eleven (2-15), steel plate nine (2-13) and steel plate eight (2-12) are welded in sequence from the inside to the outside, wherein the two steel plates eleven (2-15) are welded at intervals in the middle of the steel plate twelve (2-16), and the two steel plates nine (2-13) are welded at intervals in the middle of the steel plate twelve (2-16). The two steel plates eleven (2-15) are welded to the two ends of the steel plate twelve (2-16) respectively; the steel plate ten (2-14) is welded to the steel plate nine (2-13) and the steel plate eleven (2-15) for sealing; the steel plate seven (2-11) is welded to the steel plate eight (2-12) and the steel plate nine (2-13) for sealing; after sealing, the sealed chamber is formed in sequence as cavity five (05), cavity six (06), cavity seven (07) and cavity eight (08) at the lower side, and cavity five (05) and cavity one (01) are located on the same side; The left and right ends of the external frame structure are airtightly welded with steel plate 1 (1-1); the lower cavity 5 (05), cavity 6 (06), cavity 7 (07), cavity 8 (08) and steel plate 1 (1-1) of the sealed chamber constitute welded part 2 for assembling the sealed chamber; the welded part 1 and the welded part 2 are assembled and welded by airtight welding to form a sealed chamber frame 1; there is a cavity 9 (09) between the welded part 1 and the welded part 2; Two steel plates (1-3) with end flanges are welded to the two ends of the sealed chamber frame one, and the steel plate (1-3) is vertically and airtightly welded with the steel plate (2-7), the steel plate (2-12) and the steel plate (2-16) to form the sealed chamber frame two; The two end face sealing cover units (1-8) are connected to the second upper steel plate (1-3) of the second sealing chamber frame by bolts, and the second gasket (1-5) is installed to form a sealing chamber frame; Two side manhole cover units (1-7) are respectively installed on the two side manhole flanges of the frame 2 by bolts, and a gasket 1 (1-4) is installed to achieve the sealing of the manhole; The gap sealing unit comprises a gap adjustment plate (2-19) under the roller body and a roller body bell-mouth sealing triangular plate (2-18); the gap adjustment plate (2-19) under the roller body is provided with two pieces, connected to the sealing chamber frame 2, and respectively placed under the roller bodies of the two sealing rollers; The sealing triangle plate (2-18) is a welded part, which is welded and installed at both ends of the lower channel of the sealing chamber strip steel near the bell mouth of the sealing roller, wherein the lower part of the sealing triangle plate (2-18) is welded between two steel plates (2-15); the upper part of the sealing triangle plate (2-18) is in the shape of an isosceles triangle, with arcs on both sides, the arcs fit the arcs of the sealing roller body, and have a small gap.

2. The sealing chamber for the rapid cooling section of a continuous annealing furnace according to claim 1, characterized in that: The external frame structure is also provided with angle steels and supports, wherein the angle steels include 4 angle steels 1 (2-1), 4 angle steels 2 (2-3), 4 angle steels 3 (2-5) and 4 angle steels 4 (2-6). The 4 angle steels 1 (2-1) of different lengths are airtightly welded to the lower surface of the steel plate 12 (2-16) to form a lower mounting flange of the sealed chamber for docking with the furnace on the inlet side of the sealed chamber; the 4 angle steels 4 (2-6) of different lengths are airtightly welded to the upper surface of the steel plate 3 (2-7) to form an upper mounting flange of the sealed chamber for docking with the furnace on the outlet side of the sealed chamber; the 4 angle steels 2 (2-3) and the 4 angle steels 3 (2-5) are airtightly welded to the steel plates 8 (2-12) on both sides; The support includes support 1 (2-2) and support 2 (2-4) welded to the end of the external frame structure, which are used for installation and fixation of the sealing chamber of the fast cooling section, and each support is connected to the steel structure on the furnace by bolts.

3. The sealing chamber for the rapid cooling section of a continuous annealing furnace according to claim 1, characterized in that: The shaft end sealing cover unit (1-8) comprises a round long plate end cover flange (4-2), a steel ring (4-3) and a special-shaped metal graphite filler (4-1); the round long plate end cover flange (4-2) is a flat plate structure with a square middle and arc-shaped ends, and a circle of bolt holes are evenly distributed on its outer edge for matching with the end face flange holes on the steel plate 2 (1-3) at both ends of the external frame structure, and connected by a first bolt and a gasket 2 (1-5); two round long holes are provided on the round long plate end cover flange (4-2), which are respectively the holes for passing through the shafts of two sealing rollers; the edge of each round long hole is evenly distributed with a circle of threaded through holes, and the threaded through holes are matched and connected with second bolts for installing the flexible expansion joint of the shaft of the sealing roller; The steel ring (4-3) is vertically and discontinuously welded on the round long plate end cover flange (4-2), and the steel ring (4-3) is surrounded by a rectangular steel plate along the inner side of the first bolt of the round long plate end cover flange (4-2) to form a cavity, and the two end portions of the steel ring (4-3) are located between the first bolt and the second bolt; The special-shaped metal graphite filler (4-1) is integrally formed from metal graphite powder and is embedded in the cavity of the steel ring (4-3) by means of anchor pins welded to the round plate end cover flange (4-2); the outer ring shape of the special-shaped metal graphite filler (4-1) matches the inner side of the cavity of the steel ring (4-3), and the inner ring shape fits the bell mouth of the sealing roller, with a small gap between the bell mouth and the outer ring.

4. The sealing chamber for the rapid cooling section of a continuous annealing furnace according to claim 1, characterized in that: The side manhole cover unit (1-7) comprises a method flange (5-7), a panel (5-1), refractory fiber cotton (5-5), a plurality of anchoring nails (5-2), a sealing plate (5-6) and a handle (5-8); the method flange (5-7) is made of a steel plate, and bolt holes are evenly distributed on the outer edge, and is used for being installed in coordination with the manhole flange of the external frame structure through bolts; the panel (5-1) is welded to the front of the method flange (5-7), and the cavity profile formed is smaller than the manhole on the steel plate eight (2-12) of the external frame structure; the plurality of anchoring nails (5-2) are vertically welded to the front of the method flange (5-7) and are located in the cavity of the panel (5-1). ; Refractory fiber cotton (5-5) is stacked layer by layer in the cavity of the enclosure (5-1), with no gap between the refractory fiber cotton (5-5) and the enclosure (5-1), and a plurality of anchoring nails (5-2) are inserted through multiple layers of refractory fiber cotton (5-5); the sealing plate (5-6) is fixed to the top of the anchoring nail (5-2) through the nut (5-4) and the pad (5-3) and cooperates with the anchoring nail (5-2) to seal the refractory fiber cotton (5-5) inside; the enclosure (5-1), the refractory fiber cotton (5-5), the anchoring nail (5-2) and the sealing plate (5-6) form a thermal insulation layer; the handle (5-8) is welded to the outer back side of the method flange (5-7).

5. The sealing chamber for the rapid cooling section of a continuous annealing furnace according to claim 1, characterized in that: The roller body lower gap adjustment plate (2-19) is made of a rectangular steel plate (6-2) with a metal graphite plate (6-1) laid on one side; Two groups of bolt top screws are installed on both sides of the steel plate ten (2-14), each group of bolt top screws includes at least two sealing plate (5-6) roller body sealing plate (5-6) adjusting screws (2-17), the top of the sealing plate (5-6) roller body sealing plate (5-6) adjusting screw (2-17) is in contact with the bottom of the gap adjustment plate (2-19) under the roller body, and is used to adjust the height of the gap adjustment plate (2-19) under the roller body; Two rectangular holes are formed on both sides of the steel plate twelve (2-16), and the height of the gap adjustment plate (2-19) under the roller body can be adjusted by rotating the bolts through the rectangular holes.

6. An assembly process for a sealed chamber of a rapid cooling section of a continuous annealing furnace according to any one of claims 1 to 5, characterized in that: The steps include: S1. Use one piece of steel plate three (2-7) as the bottom, weld two pieces of steel plate eight (2-12) according to the size, weld two pieces of steel plate six (2-10), weld two pieces of steel plate four (2-8), and ensure that the last six steel plates are perpendicular to steel plate three (2-7) and welded airtightly; S2. Use one steel plate five (2-9) and two steel plates seven (2-11) to seal the sealed chamber, forming the upper side cavity one (01), cavity two (02), cavity three (03), and cavity four (04); the upper side cavity one (01), cavity two (02), cavity three (03), and cavity four (04) of the sealed chamber constitute the welded part one of the sealed chamber assembly; S3, use another steel plate 12 (2-16) as the bottom, vertically weld two steel plates 11 (2-15), vertically weld two steel plates 9 (2-13), and weld them airtightly; S4, using one steel plate ten (2-14) and two steel plates seven (2-11) to perform sealing welding to form cavity five (05), cavity six (06), cavity seven (07), and cavity eight (08) at the lower side of the sealed chamber; S5. Weld the two steel plates (1-1) at the left and right ends to make them airtight; S6, the sealed chamber lower side cavity five (05), cavity six (06), cavity seven (07), cavity eight (08) and steel plate one (1-1) constitute the sealed chamber assembly welded part two; S7, assembling and welding the welding piece 1 and the welding piece 2, and performing airtight welding to form a sealed chamber frame 1; a cavity 9 (09) is provided between the welding piece 1 and the welding piece 2; Welding two steel plates (1-3) with end flanges to the two ends of the sealed chamber frame one, and vertically and airtightly welding the steel plate (1-3) with the steel plate (2-7), the steel plate (2-12), and the steel plate (2-16) to form the sealed chamber frame two; S8, vertically welding a steel ring (4-3) on each of the two round long plate end cover flanges (4-2), intermittently welding, and then embedding and installing the special-shaped metal graphite filler (4-1) in the cavity of the steel ring (4-3) to form a shaft end sealing cover unit (1-8); S9, connecting the two shaft end sealing cover units (1-8) and the second upper steel plate (1-3) of the sealing chamber frame through the first bolts and the second gasket (1-5) to form a sealing chamber frame; S10, installing the sealing plate (5-6) and the roller body sealing plate (5-6) adjusting screws (2-17) for adjusting the height of the roller body sealing plate (5-6), and simultaneously placing two roller body lower gap adjustment plates (2-19) into the second sealing chamber frame; S11, using a square flange (5-7) as a base, welding a certain number of anchoring nails (5-2) on it, and calibrating the anchoring nails (5-2) to ensure that they are perpendicular to the square flange (5-7); S12, welding the enclosure (5-1), the cavity profile formed by the enclosure (5-1) is slightly smaller than the manhole on the steel plate eight (2-12), ensuring that it can be installed in a small gap insertion manner; S13, stacking fire-resistant fiber wool (5-5) layer by layer in the cavity of the enclosure (5-1), wherein the stacking filling thickness of the fiber wool (5-5) reaches the required size requirement, and there should be no gap between the fiber wool (5-5) and the enclosure (5-1), so as to ensure its heat insulation capacity; S14, installing the sealing plate (5-6), fixing it by using nuts (5-4), pads (5-3) and anchor nails (5-2), welding the handle (5-8), and completing the assembly of the side manhole cover unit (1-7); S15, completing the assembly of the second side manhole cover unit (1-7) according to steps S11 to S14; S16, installing two side manhole cover units (1-7) on the two side manhole flanges of the frame 2 respectively, installing gasket 1 (1-4) to ensure the sealing of the manhole, and bolting them together; S17, the above parts have completed the splicing and assembly of the sealing chamber external frame structure, the internal cavity unit, the shaft end sealing cover unit (1-8), the side manhole cover unit (1-7), and the gap sealing unit, and the sealing chamber box body is obtained; S18, welding 4 angle steels (2-1) of different lengths to the lower surface of the lower steel plate 12 (2-16) of the sealed chamber body, and welding them airtightly to form a lower mounting flange of the sealed chamber for docking with the furnace at the inlet side of the sealed chamber; S19, welding four angle steels (2-6) of different lengths to the upper surface of the upper steel plate (2-7) of the sealed chamber body, and welding them airtightly to form an upper mounting flange of the sealed chamber for docking with the furnace at the outlet side of the sealed chamber; S20, welding 4 pieces of angle steel 3 (2-5) and 4 pieces of angle steel 2 (2-3) on the steel plates 8 (2-12) on both sides of the sealed chamber body, and performing airtight welding to effectively increase the structural strength and stability of the sealed chamber; S21, welding support 1 (2-2) and support 2 (2-4) at the ends of the sealed chamber box, respectively. The supports are load-bearing supports of the entire sealed chamber and are connected to the steel structure on the furnace by bolts; S22. The installation of the sealing triangle plate (2-18) is carried out during the commissioning phase. After the entire sealing chamber is installed in place and the sealing roller is installed, the adjustment and positioning are carried out.

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