A fireproof door that reduces slag buildup in the observation hole and its usage method

Abstract

This invention belongs to the field of iron and steel metallurgy technology, and relates to a fire baffle door that reduces slag buildup in the observation hole and its usage method. The fire baffle door housing has an upper track with a groove, the groove having an inverted V-shaped cross-section, and a lower track with a triangular cross-section. The baffle's cross-section has a triangular upper part and an inverted V-shaped lower part, which cooperate with the upper and lower tracks to move the baffle, making it less likely for slag to get stuck in the gap between the tracks and the baffle. Driven by a motor, the baffle moves along the upper and lower tracks. When the baffle completely closes the observation hole, the end of the baffle away from the motor scrapes slag; when the baffle completely opens the observation hole, the end of the baffle closes to the motor scrapes slag. Furthermore, the device of this invention has the advantages of simple structure and low cost, and has significant practical value for improving production efficiency in iron and steel enterprises.

Description

Technical Field

[0001] This invention relates to the field of iron and steel metallurgy technology, specifically to a fireproof door that reduces slag blockage in the observation hole and its usage method. Background Technology

[0002] The converter is a major piece of equipment in domestic steelmaking. During the converter steelmaking process, the reaction inside the furnace is intense. To prevent safety accidents caused by the splashing of high-temperature molten metal, the baffle door needs to be closed during smelting. After closing the baffle door, to understand the reaction conditions inside the furnace, the observation hole needs to be opened to observe the flame characteristics at the furnace opening. The observation hole needs to be closed when the converter needs to be rotated during or after smelting. Traditional observation hole opening and closing devices generally consist of two baffles, left and right, locked on upper and lower tracks. The opening and closing of the observation hole is controlled by left and right motors moving the two baffles in opposite directions. During converter smelting, a large amount of slag is splashed, which may land around the observation hole and on the tracks. Due to the structure of traditional observation hole opening and closing devices, this slag can easily be squeezed between the two baffles. Repeated squeezing can cause it to enter the gaps between the baffles and the tracks or between the baffles and the baffle door, making the baffles difficult to open and close or even jamming them, thus preventing the observation hole opening and closing device from working properly. Summary of the Invention

[0003] To address the problems existing in the prior art, the main objective of this invention is to propose a fire baffle door and its usage method that reduces slag buildup in the observation hole. This effectively reduces the gap between the baffle and the track, or between the baffle and the fire baffle door, thus minimizing damage and maintenance issues related to the observation hole opening and closing device. Furthermore, the device of this invention features a simple structure and low cost, making it of significant practical importance for improving production efficiency in steel enterprises.

[0004] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0005] A fire door designed to reduce slag buildup in the observation hole includes a fire door housing, an observation hole on the fire door housing, an upper track and a lower track located above and below the observation hole, and a baffle located between the upper track and the lower track. The upper track has a groove with an inverted V-shaped cross-section, and the lower track has a triangular cross-section. The baffle has a triangular upper part and an inverted V-shaped lower part in its cross-section, which cooperate with the upper track and the lower track to enable the movement of the baffle.

[0006] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole as described in this invention, the fire door further includes a sampling port arranged on the fire door housing, rollers at the bottom of the fire door housing, and a fire door track.

[0007] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole according to the present invention, the length and width of the observation hole are smaller than the length and width of the baffle, and the observation hole fits snugly against the baffle.

[0008] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole according to the present invention, the upper and lower tracks are of equal length, arranged in parallel and with their center lines coinciding, and the lengths of the upper and lower tracks are 1.2 to 1.8 times the length of the baffle.

[0009] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole as described in this invention, the upper and lower tracks are respectively fixed to the fire door housing by at least two L-shaped fasteners, and a gap is left between the upper and lower tracks and the fire door housing.

[0010] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole according to the present invention, the fire door further includes a drive motor. The baffle moves along the upper and lower tracks under the drive of the drive motor. When the baffle completely closes the observation hole, the center line of the baffle coincides with the center line of the observation hole, and the end of the baffle away from the drive motor extends beyond the track.

[0011] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole according to the present invention, wherein: when the baffle fully opens the observation hole, the end of the baffle near the drive motor extends beyond the track.

[0012] As a preferred embodiment of the fire door for reducing slag buildup in the observation hole as described in this invention, the left and right ends of the baffle have a certain slope to facilitate better slag scraping when the baffle moves.

[0013] As a preferred embodiment of the fire baffle door for reducing slag blockage in the observation hole as described in this invention, the fire baffle door shell shape, sampling port, bottom roller, and fire baffle door track are consistent with the existing fire baffle door structure and are compatible with existing converter equipment.

[0014] To solve the above-mentioned technical problems, according to another aspect of the present invention, the present invention provides the following technical solution:

[0015] A method for using a fire door to reduce slag buildup in the observation hole includes the following steps:

[0016] S1. When the converter smelting starts, the baffle is moved to the position where the observation hole is fully opened by cooperating with the upper and lower rails. When the baffle moves, the baffle scrapes the slag near the end of the drive motor.

[0017] S2. When the converter smelting is finished, rotate the converter and move the baffle to the closed position of the observation hole by cooperating with the upper and lower rails. When the baffle moves, the baffle moves away from the end of the drive motor to scrape slag.

[0018] As a preferred embodiment of the method for using a fireproof door to reduce slag blockage in the observation hole as described in this invention, in the process of converter smelting, if it is necessary to measure temperature and take samples from the sampling port, the observation hole should be closed first. After the temperature measurement and sampling are completed and the converter returns to the normal smelting position, the observation hole should be opened. The method of closing and opening the observation hole is the same as steps S1 and S2.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention proposes a fireproof door and its usage method to reduce slag buildup in the observation hole. The fireproof door housing has an upper track with a groove for baffle movement, the groove having an inverted V-shaped cross-section. The lower track has a triangular cross-section. The baffle's cross-section has a triangular upper part and an inverted V-shaped lower part, which cooperate with the upper and lower tracks to move the baffle. This prevents slag from easily getting stuck in the gap between the tracks and the baffle. Driven by a motor, the baffle moves along the upper and lower tracks. When the baffle completely closes the observation hole, the end of the baffle away from the motor scrapes slag; when the baffle completely opens the observation hole, the end of the baffle closes to the motor scrapes slag. Furthermore, the device of this invention has the advantages of simple structure and low cost, and has significant practical value for improving production efficiency in steel enterprises. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram showing the observation hole of the fireproof door of the present invention fully open;

[0023] Figure 2 This is a schematic diagram showing the observation hole of the fireproof door of the present invention fully closed;

[0024] Figure 3 This is a top view of the baffle of the fireproof door of the present invention;

[0025] Figure 4 This is a left view of the baffle of the fireproof door of the present invention;

[0026] Figure 5 This is a schematic diagram of the lower track cross-section of the fireproof door of the present invention;

[0027] Figure 6 This is a schematic diagram of the upper track cross-section of the fireproof door of the present invention.

[0028] Among them: 1-fireproof door track, 2-roller, 3-sampling port, 4-lower track, 5-observation hole, 6-upper track, 7-baffle, 8-drive motor, 9-fireproof door housing.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions described below in conjunction with the embodiments will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The main objective of this invention is to provide a fireproof door that reduces slag buildup in the observation hole and its usage method, which has the following advantages:

[0032] (1) By setting the cross-section of the upper track groove to an inverted V shape, the cross-section of the lower track to a triangle, and the upper part of the baffle cross-section to a triangle and the lower part to an inverted V shape, in conjunction with the upper and lower tracks, the slag is less likely to get stuck in the gap between the track and the baffle.

[0033] (2) By designing two upper and lower tracks, each of which is fixed to the fire door by at least two L-shaped fasteners, a gap is left between the tracks and the fire door so that most of the slag can fall through the gap.

[0034] (3) By designing the baffle with a certain slope at the ends of the left and right sides, it is easier to scrape slag when the baffle moves. At the same time, the track length is designed to be 1.2 to 1.8 times the length of the baffle, so that when the observation hole is opened and closed, the end of the baffle can extend beyond the track, which makes it easier for slag to fall and less likely to get stuck in the gap between the fire door and the baffle.

[0035] (4) By designing the observation hole opening and closing device as 1 baffle and 1 motor, compared with the traditional observation hole opening and closing device of 2 baffles and 2 motors, the structure is simpler and the cost is lower.

[0036] like Figure 1-6 As shown, this embodiment of the invention provides a fire door that reduces slag buildup in the observation hole, including a fire door housing 9, an observation hole 5 disposed on the fire door housing 9, an upper track 6 and a lower track 4 located above and below the observation hole 5 respectively, and a baffle 7 located between the upper track 6 and the lower track 4; the upper track 6 is provided with a groove, and the cross-section of the groove is inverted V-shaped, and the cross-section of the lower track 4 is triangular; the upper part of the cross-section of the baffle 7 is triangular and the lower part is inverted V-shaped, and it cooperates with the upper track 6 and the lower track 4 respectively to realize the movement of the baffle 7.

[0037] In one embodiment of the present invention, the fire door further includes a sampling port 3 arranged on the fire door housing 9, a roller 2 at the bottom of the fire door housing 9, and a fire door track 1.

[0038] In one embodiment of the present invention, the length and width of the observation hole 5 are smaller than the length and width of the baffle 7, and the observation hole 5 is fitted to the baffle 7.

[0039] In one embodiment of the present invention, the upper track 6 and the lower track 4 are of equal length, arranged in parallel and with their center lines coinciding. The length of the upper track 6 and the lower track 4 is 1.2 to 1.8 times the length of the baffle 7, so that when the observation hole is opened or closed, the end of the baffle can extend beyond the track, which facilitates the slag falling and prevents it from getting stuck in the gap between the fire door and the baffle.

[0040] In one embodiment of the present invention, the upper track 6 and the lower track 4 are each fixed to the fire door housing 9 by at least two L-shaped fasteners, and a gap is left between the upper and lower tracks and the fire door housing 9.

[0041] In one embodiment of the present invention, the fire door further includes a drive motor 8. The baffle 7 moves along the upper and lower tracks under the drive of the drive motor 8. When the baffle 7 completely closes the observation hole 5, the center line of the baffle 7 coincides with the center line of the observation hole 5, and the end of the baffle 7 away from the drive motor 8 extends beyond the track, causing the remaining slag stuck between the track and the fire door housing 9 to fall off.

[0042] In one embodiment of the present invention, when the baffle 7 fully opens the observation hole 5, the end of the baffle near the drive motor 8 extends beyond the track, and the remaining slag stuck between the track and the fire door housing 9 falls off.

[0043] In one embodiment of the present invention, the left and right ends of the baffle 7 have a certain slope, which facilitates better scraping of slag when the baffle 7 moves.

[0044] In one embodiment of the present invention, the shape of the fire door housing 9, the sampling port 3, the bottom roller 2, and the fire door track 1 are consistent with the existing fire door structure and are compatible with existing converter equipment.

[0045] This invention also provides a method for using the above-mentioned fireproof door that reduces slag buildup in the observation hole, comprising the following steps:

[0046] S1. After adding scrap steel and molten iron to the converter, the fire baffle shell 9 is closed. The fire baffle shell 9 moves to the closed position on the fire baffle track 1, and then the converter begins smelting. When the converter smelting begins, the observation hole 5 is opened. At this time, the drive motor 8 is started. The drive motor 8 pulls the baffle 7 to the position where the observation hole 5 is fully open through the cooperation of the upper and lower tracks. When the baffle 7 moves, the end of the baffle 7 scrapes slag. Most of the slag falls directly or falls through the gap between the track and the fire baffle shell 9. Some slag may be stuck in the gap between the track and the fire baffle shell 9. When the baffle 7 moves to the end near the drive motor 8 and exceeds the track, the remaining slag stuck between the track and the fire baffle shell 9 falls.

[0047] S2. After the converter smelting is completed and the converter is rotated, the observation hole 5 needs to be closed and the drive motor 8 needs to be started. The drive motor 8 pushes the baffle 7 to the closed position through the cooperation of the upper and lower rails. When the baffle 7 moves, the end of the baffle 7 scrapes slag. Most of the slag falls directly or falls through the gap between the rail and the fire door housing 9. Some slag may get stuck in the gap between the rail and the fire door housing 9. When the end of the baffle 7 moves away from the drive motor 8 and exceeds the rail, the remaining slag stuck between the rail and the fire door housing 9 falls.

[0048] In one embodiment of the present invention, if it is necessary to measure temperature and take samples from sampling port 3 during the converter smelting process, the observation hole 5 should be closed first. After the temperature measurement and sampling are completed and the converter returns to the normal smelting position, the observation hole 5 should be opened. The method of closing and opening the observation hole 5 is the same as steps S1 and S2.

[0049] The fireproof door housing of this invention features an upper track with a groove for moving the baffle, the groove having an inverted V-shaped cross-section, while the lower track has a triangular cross-section. The baffle's cross-section has a triangular upper portion and an inverted V-shaped lower portion, respectively cooperating with the upper and lower tracks to achieve baffle movement. This prevents slag from easily getting stuck in the gap between the track and the baffle, reducing damage and maintenance issues related to the observation hole opening and closing device. Furthermore, the device of this invention is simple in structure and low in cost, making it of significant practical importance for improving production efficiency in steel enterprises.

[0050] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fire door that reduces slag buildup in the observation hole, characterized in that, The device includes a fire door housing, an observation hole on the fire door housing, an upper track and a lower track located above and below the observation hole, and a baffle between the upper track and the lower track. The upper track has a groove with an inverted V-shaped cross-section, and the lower track has a triangular cross-section. The baffle has a triangular upper part and an inverted V-shaped lower part in its cross-section, which cooperate with the upper track and the lower track to realize the movement of the baffle, making it less likely for slag to get stuck in the gap between the track and the baffle. The upper and lower tracks are fixed to the fire door housing by L-shaped fasteners, and gaps are left between the upper and lower tracks and the fire door housing so that most of the slag falls through the gaps. The fireproof door also includes a drive motor. The baffle moves along the upper and lower tracks under the drive of the drive motor. When the baffle completely closes the observation hole, the end of the baffle away from the drive motor extends beyond the track to scrape off slag, and the remaining slag stuck between the track and the fireproof door housing falls off. When the baffle completely opens the observation hole, the end of the baffle near the drive motor extends beyond the track to scrape off slag, and the remaining slag stuck between the track and the fireproof door housing falls off.

2. The fireproof door for reducing slag buildup in the observation hole according to claim 1, characterized in that, The fire door also includes a sampling port arranged on the fire door housing, rollers at the bottom of the fire door housing, and a fire door track.

3. The fireproof door for reducing slag buildup in the observation hole according to claim 1, characterized in that, The length and width of the observation hole are smaller than the length and width of the baffle, respectively, and the observation hole fits into the baffle.

4. The fireproof door for reducing slag buildup in the observation hole according to claim 1, characterized in that, The upper and lower tracks are of equal length, arranged in parallel with their center lines coinciding, and the length of both the upper and lower tracks is 1.2 to 1.8 times the length of the baffle.

5. A method of using a fireproof door with reduced slag buildup in the observation hole as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. When the converter smelting starts, the baffle is moved to the position where the observation hole is fully opened by cooperating with the upper and lower rails. When the baffle moves, the end of the baffle near the drive motor scrapes slag. S2. When the converter smelting is finished, rotate the converter and move the baffle to the position where the observation hole is completely closed by cooperating with the upper and lower rails. When the baffle moves, the baffle moves away from the end of the drive motor to scrape slag.

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