Furnace bottom sealing box of stepping heating furnace

Abstract

The utility model belongs to the field of industrial heating, and relates to a furnace bottom sealing box of a stepping heating furnace, a lower sealing box is divided into two parts, namely a lower sealing box and a U-shaped wading sealing box, a square flange is welded at the bottom of the lower sealing box, a U-shaped flange is welded at the top of the U-shaped wading sealing box, and the U-shaped wading sealing box is connected with the lower sealing box through flanges and fasteners. The side parts of the two U-shaped sealing boxes are connected through a sealing plate and a fastener; only the wading sealing box is arranged in the water of the water sealing tank and is divided into two U-shaped structures, so that the size of the sealing box is reduced, the replacement difficulty is reduced, the replacement time is shortened, the labor intensity of constructors is reduced, safe and stable production of the heating furnace is ensured, and the benefit guarantee of a steel flow is realized.

Description

Technical Field

[0001] The utility model belongs to the field of industrial heating and relates to a furnace bottom sealing box of a walking heating furnace. Background Art

[0002] The walking heating furnace replaces the pusher furnace and is widely used in steel mills to heat the billet before rolling. It forms a square chamber through the furnace roof steel structure, side wall steel structure, end wall steel structure, and furnace bottom steel structure. Fixed water beams and movable water beams are set in the square chamber. The billet is transported from the charging end of the heating furnace to the discharging end of the heating furnace through the rectangular movement of the movable water beam. During the transportation, the burners arranged on the side walls and the furnace roof are used to heat and heat up to meet the rolling temperature requirements. Among them, the lower part of the movable water beam passes through the furnace bottom steel structure and the water seal groove and is fixed to the translation frame. The cavity formed between the furnace bottom steel structure and the water seal groove on the running track of the movable water beam is sealed by the furnace bottom sealing box to prevent the high-temperature flue gas in the furnace from overflowing. The conventional furnace bottom sealing box is divided into only the upper sealing box and the lower sealing box. The bottom of the lower sealing box is in the water of the water seal groove. Generally, water corrosion will be found in the lower sealing box after 3-4 maintenance cycles. Due to the compact structure of the heating furnace, the small distance between the furnace bottom steel structure and the water seal groove, the narrow space for maintenance and replacement, the difficulty in replacing the bottom sealing box as a whole, and the large number of sealing boxes in the entire furnace, resulting in a long construction period and great construction difficulty. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a furnace bottom sealing box for a step-by-step heating furnace, so as to solve the problem of limited space replacement of the furnace bottom sealing box under water corrosion conditions and reduce the heating furnace shutdown time caused by replacement of the furnace bottom sealing box.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the furnace bottom sealing box of the stepping heating furnace includes an upper sealing box, anchor nails and a lower sealing box, and also includes a U-shaped water-resistant sealing box connected to the lower sealing box, and a square flange, U-shaped flange, sealing plate and fasteners used to connect the lower sealing box and the U-shaped water-resistant sealing box; the square flange is welded at the bottom of the lower sealing box, the U-shaped flange is welded at the top of the U-shaped water-resistant sealing box, the sealing plate is welded on the side, and the lower sealing box and the two U-shaped water-resistant sealing boxes with U-shaped flanges are connected by fasteners to form a unified whole; the bottom of the U-shaped water-resistant sealing box is placed in a water seal groove that carries water, thereby forming a complete sealing structure.

[0005] Optionally, anchor nails are welded inside and on the top of the upper sealed box and masonry is carried out using casting materials. After the masonry is completed, elliptical or rectangular holes are reserved to facilitate the movement of the movable water beam of the heating furnace in the sealed box along the length of the heating furnace.

[0006] Optionally, the corner edges around the top of the upper sealed box are fixed to the furnace bottom beam and the tension beam between the beams, and only two adjacent sides of the four overlapping edges are intermittently welded to the furnace bottom beam, and the other two adjacent sides are not welded, to ensure that the upper sealed box expands thermally along the length of the heating furnace.

[0007] Optionally, the square flange is welded to the circumference of the lower sealing box.

[0008] Optionally, two U-shaped water-resistant sealing boxes are provided, the U-shaped flange on the top of the U-shaped water-resistant sealing box is connected to the square flange by fasteners, the sealing plates welded on the sides of the two U-shaped water-resistant sealing boxes are connected by fasteners, and the contact surface is filled with high-temperature and corrosion-resistant materials such as fiber ropes or high-temperature rubber pads to ensure the overall sealing of the sealing box.

[0009] Optionally, the upper sealed box and the lower sealed box are fixed by welding to form a unified whole.

[0010] Optionally, the square flange, the U-shaped flange, and the lower sealing box that are not in contact with water are made of ordinary steel plates, and the sealing plate and the U-shaped water-proof sealing box that are in contact with water are made of stainless steel plates.

[0011] The beneficial effects of the utility model are as follows: the utility model avoids the probability of "heat burns" of equipment caused by overflow of high-temperature smoke in the furnace, eliminates the potential safety hazards of maintenance personnel, reduces heat loss and improves thermal efficiency; at the same time, it solves the problem of limited space replacement of the furnace bottom sealing box under water corrosion conditions, and reduces the heating furnace shutdown time caused by replacement of the furnace bottom sealing box, indirectly prolongs the working time of the heating furnace, increases the total steel rolling output of the rolling line, and expands the total benefit of the rolling line.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 It is a left view of the utility model;

[0016] Figure 3 It is a top view of the utility model.

[0017] Figure numerals: furnace bottom beam 1, upper sealing box 2, anchor nails 3, water seal groove 4, water 5, lower sealing box 6, square flange 7, U-shaped flange 8, U-shaped wading sealing box 9, sealing plate 10, fastener 11. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0019] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0020] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships 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, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] See also Figure 1 to Figure 3, which is a furnace bottom sealing box of a step heating furnace, including an upper sealing box 2, anchor nails 3 and a lower sealing box 6, and also includes a U-shaped wading sealing box 9 connected to the lower sealing box 6, and a square flange 7, a U-shaped flange 8, a sealing plate 10 and a fastener 11 for connecting the lower sealing box 6 and the U-shaped wading sealing box 9; the square flange 7 is welded to the bottom of the lower sealing box 6, the U-shaped flange 8 is welded to the top of the U-shaped wading sealing box 9, and the sealing plate 10 is welded to the side; the lower sealing box 6 and the two U-shaped wading sealing boxes 9 with U-shaped flanges 8 are connected by fasteners 11 to form a unified whole; the U-shaped wading sealing box 9 The bottom is placed in the water seal groove 4 carrying water 5 to form a complete sealing structure. The anchor nails 3 are welded inside and on the top of the upper sealing box 2 and are built with casting materials. After the building is completed, elliptical or rectangular holes are reserved to facilitate the movement of the movable water beam 5 of the heating furnace in the sealing box along the length of the heating furnace. The corner edges around the top of the upper sealing box 2 are fixed to the furnace bottom crossbeam and the tension beam between the crossbeams. Only the adjacent two sides of the four overlapping edges are intermittently welded to the furnace bottom beam 1, and the other two adjacent sides are not welded to ensure that the upper sealing box 2 is thermally expanded along the length of the heating furnace. The square flange 7 is circumferentially welded to the lower sealing box 6.

[0022] In this embodiment, two U-shaped water-resistant sealing boxes 9 are provided, and the U-shaped flange 8 at the top of the U-shaped water-resistant sealing box 9 is connected to the square flange 7 by a fastener 11, and the sealing plates 10 welded on the sides of the two U-shaped water-resistant sealing boxes 9 are connected by a fastener 11, and the contact surface is filled with high-temperature and corrosion-resistant materials such as fiber ropes or high-temperature rubber pads to ensure the overall sealing of the sealing box.

[0023] In this embodiment, the upper sealed box 2 and the lower sealed box 6 are fixed by welding to form a unified whole.

[0024] In this embodiment, the square flange 7, the U-shaped flange 8, and the lower sealing box 6 that are not in contact with the water 5 are ordinary steel plates, and the sealing plate 10 and the U-shaped water-proof sealing box 9 that are in contact with the water 5 are stainless steel plates.

[0025] The conventional furnace bottom sealing box is divided into an upper sealing box 2 and a lower sealing box 6. The lower sealing box 6 is welded to the upper sealing box 2 as a whole at the top, and the bottom is directly placed in the water seal groove 4 and the water 5. With the production of the heating furnace, the part of the bottom of the conventional sealing box in contact with the water 5 is prone to overlooking, and then holes appear, causing hot flue gas to overflow. Because the distance between the furnace bottom beam 1 and the water seal groove 4 is small and the space is narrow, it is difficult to replace the conventional sealing box, and a single heating furnace requires a large number of sealing boxes, which will increase the construction difficulty of replacement, extend the construction time of replacement, increase the shutdown time of the heating furnace, and reduce the overall efficiency of the rolling line; the present application divides the lower sealing box 6 into two parts, namely the lower sealing box 6 and the U-shaped water-resistant sealing box 9, the square flange 7 is welded at the bottom of the lower sealing box 6, and the U-shaped flange 8 is welded on the top of the U-shaped water-resistant sealing box 9. The U-shaped water-resistant sealing box 9 is connected to the lower sealing box 6 by flanges and fasteners 11, and the sides of the two U-shaped sealing boxes are connected by sealing plates 10 and fasteners 11; a furnace bottom sealing box of a stepping heating furnace, only the water-resistant sealing box 5 is placed in the water seal groove 4 5, and is divided into two U-shaped structures, which reduces the volume of the sealing box, reduces the difficulty of replacement, shortens the replacement time, reduces the labor intensity of construction personnel, ensures the safe and stable production of the heating furnace, and realizes the benefit guarantee of the steel process.

[0026] When the utility model is implemented, the names of the various parts of the sealed box are defined according to the design unit and the user unit, and there are deviations from the names in the schematic diagram, but the parts and items referred to are all sealed boxes at the bottom of the heating furnace; the above is only one embodiment of the present invention, but the protection scope is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention. By changing the shape of the sealed box (elongated, oval, etc.), the material of the sealed box (ordinary steel plate, stainless steel plate, etc.), the connection form of the sealed box (flange connection, hinge connection, etc.), etc., they are all covered within the protection scope of the present invention.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. The furnace bottom sealing box of the walking beam heating furnace includes an upper sealing box, anchor nails and a lower sealing box, which is characterized by: It also includes a U-shaped water-resistant sealing box connected to the lower sealing box, and a square flange, a U-shaped flange, a sealing plate and fasteners used to connect the lower sealing box and the U-shaped water-resistant sealing box; the square flange is welded at the bottom of the lower sealing box, the U-shaped flange is welded at the top of the U-shaped water-resistant sealing box, the sealing plate is welded at the side, and the lower sealing box and the two U-shaped water-resistant sealing boxes with U-shaped flanges are connected by fasteners to form a unified whole; the bottom of the U-shaped water-resistant sealing box is placed in a water seal groove that carries water, thereby forming a complete sealing structure.

2. The furnace bottom sealing box of the walking beam heating furnace according to claim 1, characterized in that: Anchor nails are welded inside and on the top of the upper sealed box and the castable material is used for masonry. After the masonry is completed, elliptical or rectangular holes are reserved to facilitate the movement of the movable water beam of the heating furnace in the sealed box along the length of the heating furnace.

3. The furnace bottom sealing box of the walking beam heating furnace according to claim 2, characterized in that: The corner edges around the top of the upper sealed box are fixed to the furnace bottom beam and the tension beam between the beams. Only two adjacent sides of the four overlapped edges are intermittently welded to the furnace bottom beam, and the other two adjacent sides are not welded to ensure that the upper sealed box can expand thermally along the length of the heating furnace.

4. The furnace bottom sealing box of the walking beam heating furnace according to claim 1, characterized in that: The square flange is welded to the circumference of the lower sealing box.

5. The furnace bottom sealing box of the walking beam heating furnace according to claim 1, characterized in that: Two U-shaped water-resistant sealing boxes are provided. The U-shaped flange on the top of the U-shaped water-resistant sealing box is connected to the square flange by fasteners. The sealing plates welded on the sides of the two U-shaped water-resistant sealing boxes are connected by fasteners. The contact surface is filled with high-temperature and corrosion-resistant materials such as fiber ropes or high-temperature rubber pads to ensure the overall sealing of the sealing box.

6. The furnace bottom sealing box of the walking beam heating furnace according to claim 1, characterized in that: The upper sealed box and the lower sealed box are fixed by welding to form a unified whole.

7. The furnace bottom sealing box of the walking beam heating furnace according to claim 1, characterized in that: The square flange, U-shaped flange and lower sealing box that are not in contact with water are made of ordinary steel plates, while the sealing plate and U-shaped water-proof sealing box that are in contact with water are made of stainless steel plates.

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