A furnace door fire damper assembly and a muffle furnace

Abstract

A furnace door fire baffle assembly and a melting furnace, the furnace door fire baffle assembly is hollow inside and open at the back, comprising: a partially open back wall, a detachable bottom wall, a top wall for connecting the bottom of the furnace door, and a limiting plate fixedly installed on the top wall and surrounding a defined encapsulation groove between the top wall and the limiting plate, a bolt I is telescopically adjusted and installed on the limiting plate, the screw rod of the bolt I can extend into a filling space for filling refractory material between the encapsulation groove and the back wall. The limiting plate is in L-shaped structure, and the corresponding part of the top wall forms an open encapsulation groove towards the back wall. The melting furnace fixes the above-mentioned furnace door fire baffle assembly on the bottom of the furnace door as a fire baffle structure. In this way, the melting furnace can conveniently provide a fire baffle structure, and it is convenient to remove the bottom wall according to the need to fill, replace refractory material, and adjust the filled refractory material by using the bolt.

Description

Technical Field

[0001] This utility model relates to furnace body insulation and sealing technology, and in particular to a new type of furnace door baffle plate assembly and melting furnace, which can be applied to the aluminum alloy smelting industry, etc. Background Technology

[0002] Traditional furnace door baffles are made of two stacked Q235A steel plates. The steel plates are connected to the furnace door and to each other with 12.9 grade high-strength bolts to increase the actual sealing area of ​​the furnace door, enhance the sealing and heat preservation effect, and prevent the furnace door body from being damaged and deformed by prolonged exposure to high-temperature flames and flue gas.

[0003] However, significant improvements and design possibilities remain during use. Traditional Q235A steel plates are easily eroded and damaged at the contact points by high-temperature flames and flue gas, leading to weakened sealing and increased heat loss. Furthermore, because this parallel stacked assembly is perpendicular to the feeding tool, it is prone to impact during the smelting and feeding process. Bolts at the joints or the bottom layer of Q235A steel plate are easily deformed or broken due to external forces, increasing the frequency and difficulty of maintenance and replacement. Therefore, if the furnace door baffle cannot be improved, energy consumption and spare parts replacement will inevitably increase, raising the company's production costs. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a novel furnace door fire baffle assembly.

[0005] According to one aspect of the present invention, a furnace door baffle assembly is provided, having an inner cavity and a rear opening, comprising: a partially open rear wall, a detachable bottom wall, a top wall for connecting to the bottom of the furnace door, and a limiting plate fixedly installed on the top wall and surrounding and defining a sealing groove between the limiting plate and the top wall. A bolt I is telescopically and adjustablely installed on the limiting plate, and the screw of the bolt I can extend toward the rear wall side into a filling space for filling refractory material located between the sealing groove and the rear wall.

[0006] Preferably, the limiting plate has an L-shaped structure, which, together with the corresponding part of the top wall, forms a sealing groove that opens towards the rear wall.

[0007] Preferably, the lower part of the rear wall is open, and the upper part is a bayonet plate, forming a filling space for encapsulating refractory material between the spaced-apart limiting plate and the bayonet plate.

[0008] Preferably, the furnace door baffle assembly is configured as a box-shaped structure, and further includes a front wall, a right wall and a left wall, wherein the limiting plate has a length consistent with the width between the right wall and the left wall, and is installed between the right wall and the left wall.

[0009] Preferably, the height of the rear wall is greater than that of the front wall, so that the bottom wall in the installed state forms a relatively inclined oblique sealing plate relative to the top wall.

[0010] Preferably, the right and left walls are perpendicular to the front, rear, top, and bottom walls, and except for the bottom wall, the walls are sealed together by welding or integral casting.

[0011] Preferably, the furnace door baffle assembly is made of RQT Al4Si4 high silicon aluminum ductile iron.

[0012] Preferably, each hole of the fixing bolt I is a racetrack-shaped elongated hole.

[0013] Preferably, the outer surface of the furnace door baffle assembly is treated with a frosted, high-temperature resistant silver powder high-temperature paint.

[0014] According to another aspect of the present invention, a furnace is provided in which the above-mentioned furnace door fire baffle assembly is fixedly installed at the bottom of the furnace door as a fire baffle structure.

[0015] According to this utility model, a baffle structure can be conveniently provided for a melting and holding furnace, and the bottom wall can be easily removed as needed to fill and replace refractory materials, as well as the refractory material can be adjusted using bolts. The position of the refractory material can be controlled by the bolt screwing length. Thus, the large bottom surface of the trapezoidal baffle has a larger contact area with the furnace edge, resulting in a larger actual sealing area and a superior sealing effect compared to traditional melting and holding furnace door baffles. Attached Figure Description

[0016] Figure 1 A perspective view of the furnace door baffle assembly of an embodiment is shown schematically.

[0017] Figure 2 A schematic front view of the furnace door baffle assembly is shown.

[0018] Figure 3 A schematic side view of the furnace door baffle assembly is shown.

[0019] Figure 4 A schematic top view of the furnace door baffle assembly is shown. Detailed Implementation

[0020] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present invention, enabling those skilled in the art to implement and use the present invention in various environments and for various applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended to, and should not be considered as, limiting descriptions of the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the drawings are not necessarily drawn to actual scale. Regarding orientation descriptions, such as front being the side in front of the operator and rear being the opposite side, and the orientations or positional relationships indicating the inner and outer sides of the main body, as well as upper, lower, left, right, top, and bottom, are all based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Unless otherwise specifically stated, the order and numerical values ​​of the components and assembly steps described in the embodiments do not limit the scope of the present invention.

[0021] According to an embodiment of this utility model, a furnace door baffle assembly is provided, suitable for use in a furnace with heat exchanger, particularly as a baffle installed at the bottom of the furnace door. For easier observation of its overall structure, Figure 1 Shown in an inverted and partially opened assembled state, its overall structure is a box-shaped body with an inner cavity and a rear opening, including: a front wall 1, a partially open rear wall 2, a detachable bottom wall 3, a right wall 9, a left wall 10, a top wall 11, and a limiting plate 7 fixedly installed on the top wall 11 and surrounding and defining the encapsulation groove between the limiting plate 7 and the top wall 11. A bolt I4 is telescopically and adjustablely installed on the limiting plate 7, and the screw of the bolt I4 extends toward the rear wall 2 and can extend into the refractory material filled between the encapsulation groove and the rear wall 2.

[0022] Reference Figure 2 The front view and Figure 4 As can be seen from the top view, the top wall 11 is provided with, for example, four bolt holes 5 for fixing to the bottom of the furnace door using bolts II 15. Combined with... Figure 3It is understood that an L-shaped limiting plate 7 is fixedly installed on the cavity side of the top wall 11, forming a sealing groove that opens towards the rear wall 2. The lower part of the rear wall 2 is open, while the upper part is closed or forms a threshold-like latch plate 12, for example, about 10mm higher than the surface of the top wall 11. Between the mutually spaced limiting plate 7 and latch plate 12, a filling space 8 for sealing refractory materials is formed, such as refractory materials of different materials or specifications, such as zirconium-containing refractory cotton, refractory sealing rope, and rapid refractory repair material. Two elongated bolts I4 can then be installed through the bottom side of the sealing groove of the limiting plate 7. By adjusting the screw-in length of the bolts I4, the refractory material filled in the filling space 8 is held in place. Preferably, the limiting plate 7 has a length consistent with the width between the right wall 9 and the left wall 10, and is installed between the right wall 9 and the left wall 10. Therefore, the bolt I4 fixed to the limiting plate 7 can be used to flexibly adjust the filling space 8, and the bayonet plate 12 can effectively prevent the refractory material from falling off to meet different sealing requirements. Facing the furnace mouth, it can increase the actual sealing area and achieve the effect of heat preservation.

[0023] Preferably, the front wall 1 and the rear wall 2 have different heights, especially the rear wall 2, which is higher than the front wall 1. This allows the bottom wall 3, in its installed state, to form a relatively inclined oblique sealing plate relative to, for example, the horizontally arranged top wall 11. The bottom wall 3 can be detachably installed on the main body of the box-shaped structure, thus forming a trapezoidal furnace door baffle assembly that is smaller at the front and larger at the rear. When installed at the bottom of the furnace door of the melting furnace, with the front wall 1 facing outwards where the operator is located, and the slope of the bottom wall 3 forming an obtuse angle with the feeding tool, the baffle can effectively reduce collisions during material feeding. The bottom wall 3 is designed to be detachable, facilitating the removal and replacement of the filling and refractory material as needed, and allowing for appropriate adjustments to the bolts I4 fixed to the limiting plate 7.

[0024] like Figure 3 As shown. The bottom wall 3 is fixed to the right wall 9 and the left wall 10 by bolts III6. Preferably, the right wall 9 and the left wall 10 are perpendicular to the front wall 1, the rear wall 2, the top wall 11, and the bottom wall 3. Except for the bottom wall 3, the walls of the main body of the box-shaped structure can be sealed together by welding (e.g., using Ni-Fe welding wire) or integral casting. For this purpose, sealing grooves can also be provided in the corresponding locations.

[0025] Preferably, the main body and bottom wall 3 of the box-shaped structure are made of RQT Al4Si4 high-silicon aluminum ductile iron. RQT Al4Si4 high-silicon aluminum ductile iron is an economical 900℃-grade heat-resistant ductile iron with many significant advantages compared to other materials. It has a continuous heat resistance temperature ≤900℃, strong mechanical properties, high high-temperature strength retention, stable working condition, and long service life under oxidizing-thermal cycling conditions. RQT Al4Si4 high-silicon aluminum ductile iron is widely used in high-temperature environments, such as furnace door frames in high-temperature furnace components and heat treatment equipment, offering high reliability. RQT Al4Si4 high-silicon aluminum ductile iron has better vibration damping properties than ordinary steel; its graphite spherical structure can absorb some energy during vibration propagation, thus playing a damping role and effectively reducing noise and equipment wear. The main body of the box-shaped structure is made of RQT Al4Si4 high-silicon aluminum ductile iron, which combines the advantages of this material. Compared with Q235A, it has superior high-temperature resistance, vibration damping, oxidation resistance, and mechanical properties. Furthermore, the RQT Al4Si4 high-silicon aluminum spherical mill cast iron fire baffle is assembled on-site using high-strength bolts, avoiding the disadvantage of poor weldability of cast iron during on-site operation.

[0026] Each hole for fixing the bolts can be fabricated into a racetrack shape (i.e., a roughly elliptical elongated hole) to allow for adjustment of bolt positioning and installation on site, thus ensuring ease of installation.

[0027] Furthermore, the outer surface of the main body is treated with a frosted finish and high-temperature resistant silver powder paint. The surface must be free of burrs or protrusions to avoid gaps between the two fire baffles during installation.

[0028] In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. Unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Although the present invention has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described inventive concept. Therefore, it is intended that the present invention be limited to the described embodiments but will have the full scope defined by the language of the appended claims.

Claims

1. A furnace door fire baffle assembly, characterized in that, The inner side is a cavity and the rear side is open, including: a partially open rear wall (2), a detachable bottom wall (3), a top wall (11) for connecting the bottom of the furnace door, and a limiting plate (7) fixedly installed on the top wall (11) and surrounding and defining the encapsulation groove between the top wall (11). A bolt I (4) is telescopically and adjustablely installed on the limiting plate (7), and the screw of the bolt I (4) can extend toward the rear wall (2) into the filling space (8) for filling refractory material located between the encapsulation groove and the rear wall (2).

2. The furnace door fire baffle assembly according to claim 1, characterized in that, The limiting plate (7) has an L-shaped structure, which, together with the corresponding part of the top wall (11), forms a sealing groove that opens toward the rear wall (2).

3. The furnace door fire baffle assembly according to claim 1, characterized in that, The lower part of the rear wall (2) is open, and the upper part is a bayonet plate (12). A filling space (8) for sealing refractory material is formed between the mutually spaced limiting plate (7) and the bayonet plate (12).

4. The furnace door fire baffle assembly according to claim 1, characterized in that, It is configured as a box-shaped structure and also includes a front wall (1), a right wall (9) and a left wall (10). The limiting plate (7) has a length that is consistent with the width between the right wall (9) and the left wall (10) and is installed between the right wall (9) and the left wall (10).

5. The furnace door fire baffle assembly according to claim 4, characterized in that, The height of the rear wall (2) is greater than that of the front wall (1), so that the bottom wall (3) in the installed state forms a relatively inclined oblique sealing plate relative to the top wall (11).

6. The furnace door fire baffle assembly according to claim 4 or 5, characterized in that, The right wall (9) and left wall (10) are perpendicular to the front wall (1), rear wall (2), top wall (11) and bottom wall (3). Except for the bottom wall (3), the walls are sealed together by welding or integral casting.

7. The furnace door fire baffle assembly according to claim 4 or 5, characterized in that, It is made of RQT Al4Si4 high silicon aluminum ductile iron.

8. The furnace door fire baffle assembly according to claim 4 or 5, characterized in that, The holes of the fixing bolt I (4) are long holes in the shape of a racetrack.

9. The furnace door fire baffle assembly according to claim 4 or 5, characterized in that, The outer surface is treated with a frosted finish and high-temperature resistant silver powder paint.

10. A melting and holding furnace, characterized in that, A furnace door baffle assembly as described in any one of claims 1 to 9 is fixedly installed at the bottom of the furnace door as a baffle structure.

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