A water seal groove slagging device of a steel rolling heating furnace

Abstract

This utility model relates to the technical field of water seal troughs for heating furnaces, specifically a slag removal device for a water seal trough in a steel rolling heating furnace. It includes a stainless steel plate (first type), a shaped stainless steel plate (second type), nuts, an upper flange, a lower flange end cap, bolts, a stainless steel pipe, a drain valve, and sealing strips. The stainless steel plate (first type) and the shaped stainless steel plate (second type) are fully welded together, and both are then fully welded to the upper flange to form an upper frame. The upper flange and the lower flange end cap are connected and tightened with bolts and nuts, with sealing strips installed between them. The lower flange end cap is fully welded to the stainless steel pipe, and a drain valve is installed on the flange at the other end of the stainless steel pipe. The device is installed at the bottom of the furnace water seal trough, aligned with the holes in the movable columns. This utility model solves the problem that in existing heating furnaces, after cooling, operators must enter through the side wall maintenance manhole and use tools to move the oxide slag outside the furnace in a space with many water beams and columns, limited space, and high temperature and dust. This is difficult due to mechanical operation, limited personnel, low slag removal efficiency, long cycle, and high labor costs.

Description

Technical Field

[0001] This utility model relates to the field of water seal trough technology for heating furnaces, specifically to a slag discharge device for a water seal trough of a steel rolling heating furnace. Background Technology

[0002] A steel rolling mill heating furnace is a billet heating device designed to heat steel billets to a suitable temperature, reducing their deformation resistance during rolling and enhancing their plasticity, while also improving their microstructure and properties. During the heating process, a large amount of iron oxide scale is generated, some of which accumulates inside the furnace. Over time, this accumulation increases, eventually affecting the uniform heating of the billet. At this point, furnace shutdown and slag removal are often necessary to provide space for gas combustion. Traditional slag removal methods involve transferring slag from the furnace through maintenance manholes on the furnace side, as shown in the attached diagram. Figure 6 The oxide slag inside the furnace is broken up manually and transferred to the maintenance manhole, and then transferred to a designated area by a trolley.

[0003] Traditional slag removal methods for heating furnaces involve opening the maintenance manholes on the side walls of the furnace after it has cooled down. Workers enter through these manholes and use various tools to transfer the slag from the furnace to the outside, where it is then transported to a designated area using dump trucks. However, the numerous water-supported columns inside the furnace result in a confined space. Even after shutdown, the furnace remains warm and filled with dust, making slag removal extremely difficult. Due to the high temperature and limited space, mechanical slag removal equipment cannot operate effectively inside the furnace, and a large number of workers cannot be deployed, leading to low efficiency in slag removal, longer maintenance cycles, and high labor costs. Utility Model Content

[0004] The technical problem this utility model aims to solve is that after the existing heating furnace is cooled down, operators need to enter through the maintenance manhole on the side wall. In the furnace, which has many water beams and columns, small space, high temperature and dust, they need to use tools to move the oxide slag to the outside of the furnace for transfer. This is difficult to do mechanically and there are limited personnel, resulting in low slag cleaning efficiency, long cycle and high labor cost.

[0005] To solve the above problems, the technical solution adopted by this utility model is a slag discharge device for a water seal trough of a steel rolling heating furnace, including a stainless steel plate one, a shaped stainless steel plate two, nuts, an upper flange, a lower flange end cap, bolts, a stainless steel pipe, a drain valve, and a sealing strip; the stainless steel plate one and the shaped stainless steel plate two are fully welded together, with the side of the stainless steel plate one away from the shaped stainless steel plate two fully welded to the upper flange, and the side of the shaped stainless steel plate two away from the stainless steel plate one also fully welded to the upper flange, forming an integrated upper frame structure; The upper flange and lower flange end cover are connected and tightened by bolts and nuts, and a sealing strip is provided between the upper flange and the lower flange end cover to achieve a seal; the side of the lower flange end cover away from the upper flange is fully welded to a stainless steel pipe, and the end of the stainless steel pipe away from the lower flange end cover is equipped with a drain valve through a flange connection; the slag discharge device is installed as a whole at the bottom of the water seal tank of the heating furnace, and the installation position is aligned with the movable column hole of the heating furnace, so as to guide the oxide slag in the furnace to the bottom of the furnace and discharge it through the movable column hole when cleaning the oxide slag in the heating furnace.

[0006] As a further embodiment of this utility model: a groove is formed around the upper surface of the lower flange end cover, and the sealing strip is embedded in the groove to ensure the stable positioning of the sealing strip when the upper flange and the lower flange end cover are connected, thereby improving the sealing effect.

[0007] As a further embodiment of this utility model: the nut and the upper flange are connected by spot welding. The position of the nut on the upper flange is fixed by spot welding, which avoids the nut rotating synchronously with the bolt during the disassembly and assembly process, thus improving the convenience of disassembly and assembly.

[0008] As a further embodiment of this utility model: an installation hole is provided at the bottom of the water seal tank of the heating furnace. The size of the installation hole is adapted to the size of the upper frame structure formed by the combination of stainless steel plate one and irregular stainless steel plate two. The stainless steel plate one and irregular stainless steel plate two are connected to the edge of the installation hole at the bottom of the water seal tank of the heating furnace by full welding, so as to realize the fixed installation and sealing of the slag discharge device and the water seal tank, and prevent water in the water seal tank from seeping out from the connection part.

[0009] As a further solution of this utility model: when it is necessary to clean the oxide slag, loosen the bolts and nuts between the upper flange and the lower flange end cover, leaving only one set of bolts and nuts in a loose state. At this time, the lower flange end cover can rotate 180 degrees around the loosened bolts, so that the lower flange end cover forms a smooth slag discharge channel, which, together with the movable column hole, enables the rapid discharge of oxide slag.

[0010] Compared with the prior art, the advantages of this utility model are as follows: By installing the slag discharge device at the bottom of the water seal tank of the heating furnace and aligning it with the holes of the movable column, the slag can be directly guided through the holes of the movable column to the bottom of the furnace for discharge during slag cleaning. This avoids the problem of personnel working in the confined, high-temperature, and dusty environment inside the furnace in traditional slag cleaning. At the same time, it eliminates the need for mechanical slag cleaning equipment to operate inside the furnace, effectively solving the problems of difficult access and restricted operation for machinery, significantly improving slag cleaning efficiency, shortening maintenance cycles, and reducing labor costs. Furthermore, the device is connected to a stainless steel plate... The second feature of the irregularly shaped stainless steel plate is the full welded connection of the upper flange, the setting of the sealing strip between the upper flange and the lower flange end cover, and the full welded connection between the lower flange end cover and the stainless steel pipe. This, along with the positioning of the sealing strip by the groove in the lower flange end cover and the full welded seal between the slag discharge device and the water seal trough installation hole, ensures excellent sealing performance and prevents water leakage from the water seal trough. Furthermore, the spot welding connection between the nut and the upper flange facilitates bolt disassembly and assembly, and the design of the lower flange end cover being able to rotate 180 degrees around a single set of loose bolts further enhances the convenience of slag removal operations. The overall structure is stable and highly practical. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This utility model relates to an integral three-dimensional structure of a slag removal device for a water seal trough in a steel rolling heating furnace. Figure 1 .

[0013] Figure 2 This utility model relates to an integral three-dimensional structure of a slag removal device for a water seal trough in a steel rolling heating furnace. Figure 2 .

[0014] Figure 3 This is a schematic diagram of the slag discharge device in the slag discharge device of the water seal trough of a steel rolling heating furnace according to the present invention.

[0015] Figure 4 This is an installation diagram of the slag discharge device in the slag discharge device of the water seal trough of a steel rolling heating furnace according to the present invention.

[0016] Figure 5 This is a schematic diagram showing the slag discharge device opened in the slag discharge device of the water seal trough of a steel rolling heating furnace according to this utility model.

[0017] Figure 6 This is a schematic diagram of the slag discharge device in the water seal trough slag discharge device of a steel rolling heating furnace according to the present invention.

[0018] In the attached image:

[0019] 1. Stainless steel plate one; 2. Irregularly shaped stainless steel plate two; 3. Nuts; 4. Upper flange; 5. Lower flange end cap; 6. Bolts; 7. Stainless steel pipe; 8. Drain valve; 9. Sealing strip. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0022] Combined with appendix Figure 1-3 It can be seen that in manufacturing the slag discharge device of the water seal trough of the steel rolling heating furnace, stainless steel plate 1, irregular stainless steel plate 2, nut 3, upper flange 4, lower flange end cover 5, bolt 6, stainless steel pipe 7, drain valve 8, and sealing strip 9 of suitable specifications are selected first. Stainless steel plate 1 and irregular stainless steel plate 2 are first connected by full welding. Then, the side of stainless steel plate 1 away from irregular stainless steel plate 2 and the side of irregular stainless steel plate 2 away from stainless steel plate 1 are respectively fully welded to the upper flange 4 to form an integrated upper frame structure. Subsequently, a groove is processed around the upper surface of the lower flange end cover 5 to embed the sealing strip 9. The upper flange 4 is installed in the groove, and the lower flange end cover 5 is connected and tightened with bolts 6 and nuts 3. At the same time, the nuts 3 are fixed to the upper flange 4 by spot welding. Then, the side of the lower flange end cover 5 away from the upper flange 4 is fully welded to the stainless steel pipe 7. The stainless steel pipe 7 is used for drainage. A drain valve 8 is installed at the end of the stainless steel pipe 7 away from the lower flange end cover 5 through a flange connection. Finally, an installation hole matching the size of the upper frame structure is opened at the bottom of the water seal tank of the heating furnace. The stainless steel plate 1 and the irregular stainless steel plate 2 are fully welded to the edge of the installation hole to complete the overall installation of the device, ensuring that the installation position is aligned with the hole of the movable column of the heating furnace.

[0023] The working principle of this application is as follows: When the slag discharge device is in normal use, the upper flange 4 and the lower flange end cover 5 are tightened by bolts 6 and nuts 3, and the sealing strip 9 achieves a seal. The drain valve 8 is closed to prevent water from seeping out of the water seal tank. When the heating furnace needs to clean the oxidized slag, first open the drain valve 8 to drain the remaining water in the water seal tank, and then loosen the bolts 6 and nuts 3 between the upper flange 4 and the lower flange end cover 5, leaving only one set of bolts 6 and nuts 3 in a loose state. At this time, the lower flange end cover 5 can rotate 180 degrees around the loosened bolts 6, so that the lower flange end cover 5 forms a smooth slag discharge channel. Under the action of gravity, the oxidized slag in the furnace falls into the upper frame structure of the slag discharge device through the movable column hole of the heating furnace, and then is discharged to the designated area through the lower flange end cover 5, realizing the rapid cleaning of the oxidized slag. After cleaning, the lower flange end cover 5 is turned back to its original position, the bolts 6 and nuts 3 are tightened, and the drain valve 8 is closed to restore the normal use of the water seal tank.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A slag discharge device for a water seal trough of a steel rolling heating furnace, characterized in that: The structure includes a stainless steel plate (1), a shaped stainless steel plate (2), a nut (3), an upper flange (4), a lower flange end cap (5), bolts (6), a stainless steel pipe (7), a drain valve (8), and a sealing strip (9). The stainless steel plate (1) and the shaped stainless steel plate (2) are connected by full welding. The side of the stainless steel plate (1) away from the shaped stainless steel plate (2) is fully welded to the upper flange (4), and the side of the shaped stainless steel plate (2) away from the stainless steel plate (1) is also fully welded to the upper flange (4), forming an integrated upper frame structure. The upper flange (4) and the lower flange end cap are connected by full welding. The cover (5) is connected and tightened by bolts (6) and nuts (3), and a sealing strip (9) is provided between the upper flange (4) and the lower flange end cover (5) to achieve a seal; the side of the lower flange end cover (5) away from the upper flange (4) is fully welded to the stainless steel pipe (7), and the end of the stainless steel pipe (7) away from the lower flange end cover (5) is equipped with a drain valve (8) by flange connection; the slag discharge device is installed as a whole at the bottom of the water seal tank of the heating furnace, and the installation position is aligned with the movable column hole of the heating furnace, so as to guide the oxidized slag in the furnace to the bottom of the furnace and discharge it through the movable column hole when cleaning the oxidized slag in the heating furnace.

2. The slag discharge device for a water seal trough of a steel rolling heating furnace according to claim 1, characterized in that: A groove is formed around the upper surface of the lower flange end cover (5), and the sealing strip (9) is embedded in the groove to ensure that the sealing strip (9) is stably positioned when the upper flange (4) is connected to the lower flange end cover (5), thereby improving the sealing effect.

3. The slag discharge device for a water seal trough of a steel rolling heating furnace according to claim 1, characterized in that: The nut (3) is connected to the upper flange (4) by spot welding. The position of the nut (3) on the upper flange (4) is fixed by spot welding, so as to avoid the nut (3) rotating synchronously with the bolt (6) during the disassembly and assembly of the bolt (6), thereby improving the convenience of disassembly and assembly.

4. The slag discharge device for a water seal trough of a steel rolling heating furnace according to claim 1, characterized in that: The bottom of the heating furnace water seal tank is provided with an installation hole. The size of the installation hole is adapted to the size of the upper frame structure formed by the combination of stainless steel plate one (1) and shaped stainless steel plate two (2). The stainless steel plate one (1) and shaped stainless steel plate two (2) are connected to the edge of the installation hole at the bottom of the heating furnace water seal tank by full welding, so as to realize the fixed installation and sealing of the slag discharge device and the water seal tank, and prevent water in the water seal tank from seeping out from the connection part.

5. The slag discharge device for a water seal trough of a steel rolling heating furnace according to claim 1, characterized in that: When it is necessary to clean the oxide slag, loosen the bolts (6) and nuts (3) between the upper flange (4) and the lower flange end cover (5), leaving only one set of bolts (6) and nuts (3) in a loose state. At this time, the lower flange end cover (5) can rotate 180 degrees around the loose bolts (6), so that the lower flange end cover (5) forms a smooth slag discharge channel, which, together with the movable column hole, enables the rapid discharge of oxide slag.

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