A detachable movable fume hood for converter

Abstract

The application discloses a detachable movable smoke hood for a converter, which comprises a converter main body, supporting legs and a smoke hood main body. The upper part of the converter main body is provided with the smoke hood main body which can slide up and down through an adjusting assembly. The bottom of the converter main body is provided with the supporting legs. The top of the smoke hood main body is further provided with a cleaning assembly. The detachable movable smoke hood can solve the problem that the fixed smoke hood cannot be separated from the converter, so that the operator cannot check and clean the inner wall of the smoke hood completely, which reduces the cleaning efficiency and may cause the effective diameter of the smoke hood to be reduced and the smoke recovery effect to be affected.

Description

Technical Field

[0001] This invention relates to the field of converter technology, specifically to a detachable movable fume hood for converters. Background Technology

[0002] Existing converter hoods typically use bolts and nuts to fix the converter to the hood, sealing the top of the converter. However, this fixed connection method has several drawbacks: First, due to the harsh conditions of high temperature and high dust, the hood easily accumulates large amounts of dust and debris, severely affecting flue gas flow and heat exchange efficiency. Since the fixed hood cannot be separated from the converter, it is difficult for operators to conduct a comprehensive inspection and thorough cleaning of the hood's inner wall, reducing cleaning efficiency and potentially reducing the effective diameter of the hood, thus affecting flue gas recovery. Second, when maintenance or repairs are needed on the hood or the converter below, the inability to separate the fixed hood significantly increases the difficulty and time cost, severely impacting production. Furthermore, limited operating space and safety hazards exist when replacing the converter lining or performing other equipment maintenance. Finally, the traditional fixed connection method also increases the difficulty of installing and disassembling the hood, hindering rapid equipment maintenance and replacement. Therefore, we propose a detachable movable hood for converters. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a detachable movable fume hood for converters.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A detachable movable fume hood for a converter includes a converter body, support legs, and a fume hood body. The fume hood body is characterized in that: the upper part of the converter body is equipped with an adjustable component that allows it to slide up and down; the bottom of the converter body is provided with support legs; and the top of the fume hood body is also equipped with a cleaning component.

[0005] The adjustment assembly includes a first fixed base, a drive motor, a reciprocating lead screw, a sleeve block, an n-shaped frame, a limiting sleeve block, a limiting post, and a connecting block. The first fixed base is fixedly connected to one side of the top of the converter body. The drive motor is mounted on the first fixed base. The output end of the drive motor is fixedly connected to the reciprocating lead screw. The sleeve block is threaded onto the reciprocating lead screw. An n-shaped frame is fixedly mounted on the sleeve block. A limiting post is vertically mounted on the outer side of the n-shaped frame. The bottom of the limiting post is connected to one side of the top of the converter body through the connecting block. A limiting sleeve block is fixedly mounted on the outer wall of the n-shaped frame. The limiting sleeve block is slidably mounted on the limiting post. The n-shaped frame is mounted on the outer wall of the fume hood body.

[0006] Rotating rods are fixedly installed on both outer walls of the main body of the smoke hood. The rotating rods are rotatably connected to the inner wall of the n-shaped frame through bearings. A first gear is installed on one of the rotating rods, and a lifting rack is meshed on the first gear. The top of the lifting rack is connected to the telescopic end of the electric push rod. The electric push rod is installed on the n-shaped frame through a fixed bracket.

[0007] A limiting slider is fixedly installed on the outer wall of the lifting rack, a limiting frame is installed on the outer side of the lifting rack, the head of the limiting slider is slidably installed in the limiting frame, and an L-shaped plate is provided on the head of the limiting slider, the L-shaped plate is in contact with the side wall of the n-shaped frame.

[0008] There are four support legs, which are fixedly connected at equal intervals to the bottom of the four corners of the converter body 1.

[0009] The cleaning assembly includes a rectangular groove, a second fixed base, a forward and reverse motor, an output shaft, a second gear, a displacement rack, a connecting strip, a scraper, a rectangular block, and a U-shaped limiting strip. Two rectangular grooves are symmetrically arranged on the top of the smoke hood body. The second fixed base is fixedly installed on the top of the smoke hood body. The forward and reverse motor is installed on the top of the second fixed base. The output shaft of the forward and reverse motor is rotatably connected to the top center of the smoke hood body through a bearing. The second gear is installed on the output shaft. Two displacement racks are respectively meshed on both sides of the second gear. The bottom of the displacement rack is fixedly connected to the top of the connecting strip. The connecting strip is slidably arranged in the rectangular groove, and a scraper is fixedly connected to the bottom end of the connecting strip. The scraper is in contact with the inner wall of the smoke hood body.

[0010] Rectangular blocks are fixedly installed at both ends of the scraper, and U-shaped limiting strips are respectively installed on both sides of the inner wall of the smoke hood body. The rectangular blocks are slidably installed within the U-shaped limiting strips.

[0011] The two displacement racks have the same pitch and length, and are arranged symmetrically and alternately along the central plane of the smoke hood body.

[0012] The beneficial effects of this invention are: (1) The present invention achieves the lifting of the main body of the fume hood by setting an adjustment component. The operator turns on the drive motor to make the reciprocating screw rotate. During the rotation of the reciprocating screw, the limiting sleeve and the limiting column limit the n-shaped frame and the connecting block, which will cause the connecting block to move upward along the outer wall of the reciprocating screw. When the connecting block moves upward, it will drive the n-shaped frame to move upward. When the n-shaped frame moves upward, it will drive the main body of the fume hood to move upward, thereby realizing the process of lifting the main body of the fume hood and further realizing the separation of the fixed fume hood and the converter. (2) When the main body of the smoke hood is lifted upwards and needs to be flipped, the operator can activate the electric push rod to extend downwards and push the lifting rack to mesh with the first gear. When the lifting rack moves downwards, it will drive the limiting slider to move downwards along the inner wall of the limiting frame, thereby limiting the lifting rack during the descent and making the lifting rack rise and fall smoothly. After the lifting rack moves downwards and meshes with the first gear, it will cause the first gear to rotate, causing the rotating rod to rotate. When the rotating rod rotates, it will drive the main body of the smoke hood to flip, thereby realizing the flipping process of the main body of the smoke hood. (3) By setting up a cleaning component, when it is necessary to clean the inner wall of the smoke hood body, the operator turns on the forward and reverse motor to make the output shaft rotate. During the rotation of the output shaft, the second gear will be driven to rotate. When the second gear rotates, it will be driven to move away from the two displacement racks after meshing with them. When the two displacement racks move away from the two sides, the connecting strip will be driven to move along the inside of the rectangular groove, and the two scrapers will be driven to move along the inner wall of the smoke hood body, thereby achieving the scraping and cleaning of the inner wall of the smoke hood body, and achieving the cleaning effect of the inside of the smoke hood body. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of the adjustment component in this invention; Figure 4 This is a partial structural diagram of the adjustment component in this invention; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the cleaning component in this invention; Figure 7 This is a bottom view of the cleaning component in this invention; Figure 8 for Figure 7 A magnified view of a section at point B in the middle.

[0014] In the diagram: 1-Converter body; 2-Support leg; 3-Fumigation hood body; 41-Adjustment component; 411-First fixed seat; 412-Drive motor; 413-Reciprocating lead screw; 414-Sleeve block; 415-N-shaped frame; 416-Limiting sleeve block; 417-Limiting column; 418-Connecting block; 419-Rotating rod; 4110-First gear; 4111-Fixed bracket; 4112-Electric push rod; 4113-Lifting rack; 4114-Limiting slider; 4115-Limiting frame; 4116-L-shaped plate; 42-Cleaning component; 421-Rectangular groove; 422-Second fixed seat; 423-Forward and reverse motor; 424-Output shaft; 425-Second gear; 426-Displacement rack; 427-Connecting strip; 428-Scraper; 429-Rectangular block; 4210-U-shaped limiting strip. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0016] like Figure 1-8 As shown, a detachable movable fume hood for a converter includes a converter body 1, support legs 2, and a fume hood body 3. The fume hood body 3 is slidably mounted on the upper part of the converter body 1 via an adjustment component 41. The support legs 2 are provided at the bottom of the converter body 1, and a cleaning component 42 is also installed on the top of the fume hood body 3.

[0017] The adjustment assembly 41 includes a first fixed base 411, a drive motor 412, a reciprocating screw 413, a sleeve block 414, an n-shaped frame 415, a limiting sleeve block 416, a limiting post 417, and a connecting block 418. The first fixed base 411 is fixedly connected to one side of the top of the converter body 1. The drive motor 412 is installed on the first fixed base 411. The output end of the drive motor 412 is fixedly connected to the reciprocating screw 413. The sleeve block 414 is threadedly installed on the reciprocating screw 413. The n-shaped frame 415 is fixedly installed on the sleeve block 414. The limiting post 417 is vertically installed on the outer side of the n-shaped frame 415. The bottom of the limiting post 417 is connected to one side of the top of the converter body 1 through the connecting block 418. The limiting sleeve block 416 is fixedly installed on the outer wall of the n-shaped frame 415. The limiting sleeve block 416 is slidably installed on the limiting post 417. The n-shaped frame 415 is installed on the outer wall of the fume hood body 3.

[0018] Rotating rods 419 are fixedly installed on both outer walls of the main body 3 of the smoke hood. The rotating rods 419 are rotatably connected to the inner wall of the n-shaped frame 415 through bearings. A first gear 4110 is installed on one of the rotating rods 419. A lifting rack 4113 is meshed on the first gear 4110. The top of the lifting rack 4113 is connected to the telescopic end of the electric push rod 4112. The electric push rod 4112 is installed on the n-shaped frame 415 through a fixed bracket 4111.

[0019] A limiting slider 4114 is fixedly installed on the outer wall of the lifting rack 4113. A limiting frame 4115 is provided on the outer side of the lifting rack 4113. The head of the limiting slider 4114 is slidably installed in the limiting frame 4115, and an L-shaped plate 4116 is provided on the head of the limiting slider 4114. The L-shaped plate 4116 is in contact with the side wall of the n-shaped frame 415.

[0020] There are four support legs 2, which are fixedly connected at equal intervals to the bottom of the four corners of the converter body 1.

[0021] The cleaning component 42 includes a rectangular groove 421, a second fixed seat 422, a forward and reverse motor 423, an output shaft 424, a second gear 425, a displacement rack 426, a connecting strip 427, a scraper 428, a rectangular block 429, and a U-shaped limiting strip 4210. Two rectangular grooves 421 are symmetrically arranged on the top of the smoke hood body 3. The second fixed seat 422 is fixedly arranged on the top of the smoke hood body 3. The forward and reverse motor 423 is installed on the top of the second fixed seat 422. The output shaft 424 of the forward and reverse motor 423 is rotatably connected to the top center of the smoke hood body 3 through a bearing. The second gear 425 is installed on the output shaft 424. Two displacement racks 426 are respectively meshed on both sides of the second gear 425. The bottom of the displacement rack 426 is fixedly connected to the top of the connecting strip 427. The connecting strip 427 is slidably arranged in the rectangular groove 421, and the bottom end of the connecting strip 427 is fixedly connected to the scraper 428. The scraper 428 is in contact with the inner wall of the smoke hood body 3.

[0022] Rectangular blocks 429 are fixedly installed at both ends of the scraper 428, and U-shaped limiting strips 4210 are respectively installed on both sides of the inner wall of the smoke hood body 3. The rectangular blocks 429 are slidably installed in the U-shaped limiting strips 4210.

[0023] The two displacement racks 426 have the same tooth pitch and length, and the two displacement racks 426 are arranged symmetrically and alternately along the central plane of the smoke hood body 3.

[0024] Example 1 A detachable movable fume hood for a converter includes a converter body 1; The fume hood body 3 is slidably connected to the top of the converter body 1; And an adjustment assembly 41 is provided on the outer wall of the converter body 1. The adjustment assembly 41 includes a first fixed seat 411 fixedly connected to the top left side of the converter body 1. A drive motor 412 is fixedly connected to the inner wall of the first fixed seat 411. A reciprocating screw 413 is fixedly connected to the output end of the drive motor 412. A sleeve block 414 is threadedly connected to the outer wall of the reciprocating screw 413. An n-shaped frame 415 is fixedly connected to the right side of the sleeve block 414. A limit sleeve block 416 is fixedly connected to the outer wall of the n-shaped frame 415. A limit post 417 is slidably connected to the inner wall of the limit sleeve block 416. A connecting block 418 is fixedly connected to the bottom of the limit post 417. The side wall of the connecting block 418 is fixedly connected to the top outer wall of the converter body 1. Both inner walls of the n-shaped frame 415 are rotatably connected to a rotating bearing. The other end of the rod 419 is fixedly connected to the outer wall of the smoke hood body 3. By setting the adjustment component 41, before the smoke hood body 3 needs to be flipped, it is necessary to lift the smoke hood body 3 first. First, the operator turns on the drive motor 412 to make the reciprocating screw 413 rotate. During the rotation of the reciprocating screw 413, under the limiting action of the limit sleeve block 416 and the limit post 417 on the n-shaped frame 415 and the sleeve block 414, the sleeve block 414 will be caused to move upward along the outer wall of the reciprocating screw 413. When the sleeve block 414 moves upward, it will drive the n-shaped frame 415 to move upward. When the n-shaped frame 415 moves upward, it will drive the smoke hood body 3 to move upward, thereby realizing the process of lifting the smoke hood body 3 upward. The adjustment assembly 41 also includes a fixed bracket 4111 fixedly connected to the inner wall of the n-shaped frame 415. An electric push rod 4112 is fixedly connected to the bottom of the other end of the fixed bracket 4111. A lifting rack 4113 is fixedly connected to the output end of the electric push rod 4112. A first gear 4110 meshes with the side wall of the lifting rack 4113. The inner wall of the first gear 4110 is fixedly connected to the outer wall of the middle part of the rotating rod 419. A limit slider 4114 is fixedly connected to the outer wall of the lifting rack 4113. A limit frame 4115 is slidably connected to the outer wall of the other end of the limit slider 4114. An L-shaped plate 4116 is fixedly connected to the back of the limit frame 4115. The other end of the L-shaped plate 4116 is fixedly connected to the outer wall of the n-shaped frame 415. When the smoke hood body 3 is lifted upwards... Afterwards, when it is necessary to flip the smoke hood body 3, the operator activates the electric push rod 4112, causing the electric push rod 4112 to extend downward and push the lifting rack 4113 to mesh with the first gear 4110. As the lifting rack 4113 moves downward, it will drive the limiting slider 4114 to move downward along the inner wall of the limiting frame 4115, thereby limiting the lifting rack 4113 during the descent process and making the lifting rack 4113 rise and fall smoothly. After the lifting rack 4113 moves downward and meshes with the first gear 4110, it will cause the first gear 4110 to rotate, causing the rotating rod 419 to rotate. When the rotating rod 419 rotates, it will drive the smoke hood body 3 to flip, thus realizing the flipping process of the smoke hood body 3. The bottom of the converter body 1 is fixedly connected with four support legs 2. The four support legs 2 are fixedly connected at equal intervals at the bottom of the four corners of the converter body 1. The four support legs 2 at the bottom of the converter body 1 can provide stable support for the converter body 1. The outer wall of one end of the limiting slider 4114 is adapted to the inner wall of the limiting frame 4115. The limiting slider 4114 is used to limit the lifting rack 4113. There are four limiting sleeves 416. The four limiting sleeves 416 are located on the outer wall of the n-shaped frame 415 and are used to limit the n-shaped frame 415. The electric push rod 4112 is used to drive the lifting rack 4113 to move up and down.

[0025] Example 2 The difference from Embodiment 1 is that this embodiment discloses a cleaning component, such as... Figure 6 - Figure 8 As shown: A cleaning component 42 is also provided on the top of the smoke hood body 3. The cleaning component 42 includes two rectangular slots 421 formed on the top of the smoke hood body 3. A second fixing seat 422 is fixedly connected to the top of the smoke hood body 3. A forward and reverse motor 423 is fixedly connected to the inner wall of the top of the second fixing seat 422. An output shaft 424 is fixedly connected to the output end of the forward and reverse motor 423. The bottom outer wall of the output shaft 424 is rotatably connected to the top center of the smoke hood body 3 through a bearing. A second gear 425 is fixedly connected to the middle outer wall of the output shaft 424. Two displacement racks 426 mesh with the outer wall of the second gear 425. A connecting strip 427 is fixedly connected to the bottom of the displacement racks 426. The outer wall of the connecting strip 427 is slidably connected to the inner wall of the rectangular slots 421. A scraper 428 is fixedly connected to the bottom of the connecting strip 427. The outer wall of the scraper 428 is slidably connected to the inner wall of the smoke hood body 3. A U-shaped limiting strip 4210 is slidably connected to the bottom inner wall of the scraper 428. The side wall of strip 4210 is fixedly connected to the inner wall of the smoke hood body 3. A rectangular block 429 is fixedly connected to the bottom inner wall of scraper 428. The top of rectangular block 429 is slidably connected to the bottom of U-shaped limiting strip 4210. By setting cleaning component 42, when it is necessary to clean the inner wall of smoke hood body 3, the operator turns on the forward and reverse motor 423 to make the output shaft 424 rotate. During the rotation of output shaft 424, it will drive the second gear 425 to rotate. When the second gear 425 rotates, it will mesh with two displacement racks 426 and cause the two displacement racks 426 to move away from both sides. When the two displacement racks 426 move to both sides, they will drive the connecting strip 427 to move along the inside of rectangular groove 421 and drive the two scrapers 428 to move along the inner wall of smoke hood body 3, thereby achieving the scraping and cleaning of the inner wall of smoke hood body 3 and achieving the cleaning effect of the inside of smoke hood body 3. There are two displacement racks 426. The pitch and length of the two displacement racks 426 are the same. The two displacement racks 426 are arranged symmetrically and alternately along the central plane of the smoke hood body 3. There are two scrapers 428, both of equal size, and they are symmetrically distributed along the central surface of the smoke hood body 3. The U-shaped limiting strip 4210 and the rectangular block 429 are used to limit the scraper 428.

[0026] Working principle: Before flipping the smoke hood body 3, it is necessary to lift the smoke hood body 3 first. First, the operator turns on the drive motor 412 to make the reciprocating screw 413 rotate. During the rotation of the reciprocating screw 413, the limit sleeve 416 and the limit post 417 limit the n-shaped frame 415 and the sleeve block 414, which will cause the sleeve block 414 to move upward along the outer wall of the reciprocating screw 413. When the sleeve block 414 moves upward, it will drive the n-shaped frame 415 to move upward. When the n-shaped frame 415 moves upward, it will drive the smoke hood body 3 to move upward, thereby realizing the process of lifting the smoke hood body 3 upward. When the main body of the smoke hood 3 is lifted upwards and needs to be flipped, the operator activates the electric push rod 4112, causing it to extend downwards and push the lifting rack 4113 to mesh with the first gear 4110. As the lifting rack 4113 moves downwards, it drives the limiting slider 4114 to move downwards along the inner wall of the limiting frame 4115, thereby limiting the lifting rack 4113 during the descent and ensuring its smooth lifting and lowering. After the lifting rack 4113 moves downwards and meshes with the first gear 4110, it causes the first gear 4110 to rotate, which in turn causes the rotating rod 419 to rotate. When the rotating rod 419 rotates, it causes the main body of the smoke hood 3 to flip, thus achieving the flipping process of the main body of the smoke hood 3. When it is necessary to clean the inner wall of the smoke hood body 3, the operator turns on the forward and reverse motor 423 to make the output shaft 424 rotate. During the rotation of the output shaft 424, the second gear 425 will rotate. When the second gear 425 rotates, it will mesh with the two displacement racks 426, causing the two displacement racks 426 to move away from each other. When the two displacement racks 426 move to the sides, they will drive the connecting strip 427 to move along the inside of the rectangular groove 421, and drive the two scrapers 428 to move along the inner wall of the smoke hood body 3, thereby scraping and cleaning the inner wall of the smoke hood body 3, achieving the cleaning effect of the inside of the smoke hood body 3.

[0027] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A detachable movable fume hood for a converter, comprising a converter body (1), support legs (2), and a fume hood body (3), characterized in that: The upper part of the converter body (1) is equipped with a fume hood body (3) that can slide up and down through an adjustment component (41). The bottom of the converter body (1) is provided with support legs (2), and the top of the fume hood body (3) is also equipped with a cleaning component (42).

2. The detachable movable fume hood for a converter according to claim 1, characterized in that, The adjustment assembly (41) includes a first fixed seat (411), a drive motor (412), a reciprocating lead screw (413), a sleeve block (414), an n-shaped frame (415), a limiting sleeve block (416), a limiting post (417), and a connecting block (418). The first fixed seat (411) is fixedly connected to one side of the top of the converter body (1). The drive motor (412) is mounted on the first fixed seat (411). The output end of the drive motor (412) is fixedly connected to the reciprocating lead screw (413). (413) Install the threaded socket (414), and fix an n-shaped frame (415) on the socket (414). A limit post (417) is vertically installed on the outside of the n-shaped frame (415). The bottom of the limit post (417) is connected to the top side of the converter body (1) through the connecting block (418). A limit sleeve block (416) is fixedly installed on the outer wall of the n-shaped frame (415). The limit sleeve block (416) is slidably installed on the limit post (417). The n-shaped frame (415) is set on the outer wall of the fume hood body (3).

3. A detachable movable fume hood for a converter according to claim 2, characterized in that, Rotating rods (419) are fixedly installed on both outer walls of the main body (3) of the smoke hood. The rotating rods (419) are rotatably connected to the inner wall of the n-shaped frame (415) through bearings. A first gear (4110) is installed on one of the rotating rods (419). A lifting rack (4113) is meshed on the first gear (4110). The top of the lifting rack (4113) is connected to the telescopic end of the electric push rod (4112). The electric push rod (4112) is installed on the n-shaped frame (415) through a fixed bracket (4111).

4. A detachable movable fume hood for a converter according to claim 3, characterized in that, The outer wall of the lifting rack (4113) is fixedly provided with a limiting slider (4114), and a limiting frame (4115) is provided on the outer side of the lifting rack (4113). The head of the limiting slider (4114) is slidably installed in the limiting frame (4115), and the head of the limiting slider (4114) is provided with an L-shaped plate (4116). The L-shaped plate (4116) is in contact with the side wall of the n-shaped frame (415).

5. A detachable movable fume hood for a converter according to claim 1, characterized in that, There are four support legs (2), which are fixedly connected at equal intervals to the bottom of the four corners of the converter body (1).

6. A detachable movable fume hood for a converter according to claim 1, characterized in that, The cleaning component (42) includes a rectangular groove (421), a second fixed seat (422), a forward and reverse motor (423), an output shaft (424), a second gear (425), a displacement rack (426), a connecting strip (427), a scraper (428), a rectangular block (429), and a U-shaped limiting strip (4210). Two rectangular grooves (421) are symmetrically arranged on the top of the smoke hood body (3). The second fixed seat (422) is fixedly arranged on the top of the smoke hood body (3). The forward and reverse motor (423) is installed on the top of the second fixed seat (422). The output shaft (424) of the rotary motor (423) is rotatably connected to the top center of the smoke hood body (3) through a bearing. A second gear (425) is installed on the output shaft (424). Two displacement racks (426) are respectively meshed on both sides of the second gear (425). The bottom of the displacement rack (426) is fixedly connected to the top of the connecting strip (427). The connecting strip (427) is slidably set in the rectangular groove (421), and a scraper (428) is fixedly connected to the bottom end of the connecting strip (427). The scraper (428) is in close contact with the inner wall of the smoke hood body (3).

7. A detachable movable fume hood for a converter according to claim 6, characterized in that, Rectangular blocks (429) are fixedly installed at both ends of the scraper (428), and U-shaped limiting strips (4210) are respectively installed on both sides of the inner wall of the smoke hood body (3). The rectangular blocks (429) are slidably installed in the U-shaped limiting strips (4210).

8. A detachable movable fume hood for a converter according to claim 6, characterized in that, The two displacement racks (426) have the same pitch and length, and the two displacement racks (426) are arranged symmetrically and alternately along the central plane of the smoke hood body (3).

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