Roller replacement apparatus for furnace roller set with ultra-dense roller pitch for roller hearth furnace and using method

Abstract

The present invention relates to the technical field of metallurgical machinery. Disclosed are a roller replacement apparatus for a furnace roller set with an ultra-dense roller pitch for a roller hearth furnace and a using method. The roller replacement apparatus comprises a free-end roller replacement assembly and a transmission-end roller replacement assembly. The free-end roller replacement assembly comprises a free-end fixing plate, two support plates and free-end guide rods. The two support plates are fixedly mounted to the free-end fixing plate. The transmission-end roller replacement assembly comprises two transmission-end guide rods, U-shaped square boxes, a door-shaped frame and a transmission-end assembly. The technical product has a simple structure and is convenient to use, and the disassembly and assembly of the furnace roller set with an ultra-dense roller pitch can be completed by operators from both sides outside the furnace, without disassembling a furnace housing and furnace walls. It can be guaranteed that the furnace roller set with an ultra-dense roller pitch remains level throughout the disassembly and assembly process; the sliding-out speed is manually controllable, so that problems such as damage to quick-wear parts such as furnace roller insulation plates and the furnace rollers can be avoided to the maximum extent; and refractory materials of the furnace walls can also be ensured not to be damaged.

Description

A roller changing device and use method for an ultra-dense roller pitch roller group for a roller hearth furnace Technical Field

[0001] The invention belongs to the technical field of metallurgical machinery, and in particular relates to a roller changing device for an ultra-dense roller pitch furnace roller group for a roller hearth furnace and a use method thereof. Background Art

[0002] Roller-hearth furnaces, also known as roller-hearth heat treatment furnaces, are generally used for annealing, normalizing, quenching, and tempering of steel plates, steel pipes, steel sections, and wire rod. The heated steel is conveyed within the furnace by furnace rollers and their transmission mechanisms. Small or experimental roller-hearth furnaces have smaller hearth dimensions and smaller steel material sizes and weights. However, the heating process requirements, including heating temperature, remain the same as those for conventional roller-hearth furnaces. The rollers in these furnaces have a smaller diameter, and the roller pitch calculated based on the heating process requirements is also very small. Therefore, these small or experimental roller-hearth furnaces typically utilize a modular, ultra-close-gap roller assembly. This design balances roller diameter, ultra-close roller pitch, furnace airtightness, and cooling structure requirements while meeting the roller-hearth furnace's heating process requirements.

[0003] Existing ultra-dense-gap furnace roller assemblies adopt a modular design. Each module consists of several furnace rollers, a drive end assembly, and a free end assembly. All furnace rollers are supported on both sides by a drive end assembly and a free end assembly, respectively. The drive end assembly and the free end assembly are fixedly mounted on two full-length U-shaped square boxes. Its specific structure is shown in Figure 1 of the accompanying drawings of the specification. This modular ultra-dense-gap furnace roller assembly has a compact structure and can meet the requirements of the furnace roller diameter, ultra-dense-gap, furnace airtightness, and cooling structure while meeting the requirements of the roller hearth furnace heating process. However, this ultra-dense-gap furnace roller assembly requires high installation precision, and the roller hearth furnace hearth furnace has small dimensions and openings, making it difficult for personnel to enter the furnace. During installation, there are problems such as the upper and lower heat insulation panels being easily damaged and the furnace rollers being easily detached from the free end assemblies. Conventional furnace roller installation methods make it difficult to install and replace the furnace roller assembly.

[0004] To solve this problem, this patent develops a roller changing device and a method for using an ultra-dense roller pitch roller group for a roller hearth furnace, which can effectively solve the installation and replacement problems of this ultra-dense roller pitch roller group and is particularly suitable for small roller hearth furnaces or experimental roller hearth furnaces.

[0005] Summary of the Invention

[0006] The present invention provides a roller changing device and a use method for an ultra-dense roller pitch roller group for a roller hearth furnace, which solves the above problems.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention provides a roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace, comprising a free end roller changing assembly and a transmission end roller changing assembly;

[0009] The free end roller changing assembly includes a free end fixing plate, two bracket plates, and a free end guide rod; the two bracket plates are fixedly installed with the free end fixing plate;

[0010] The two bracket plates are connected by two first connecting rods, which are arranged one above the other and are respectively provided with two upper pressure wheels and two lower pressure wheels; the free end guide rod is inserted through the gap between the upper pressure wheel and the lower pressure wheel, the head of the free end guide rod is fixed to the mounting auxiliary part on the free end assembly, and the tail of the free end guide rod is connected by a second connecting rod, so that the two free end guide rods can move synchronously;

[0011] The transmission end roller changing assembly includes two transmission end guide rods, a U-shaped square box, a door-shaped frame, and a transmission end assembly; the two transmission end guide rods are fixedly installed on the transmission end assembly on the right side of the U-shaped square box at intervals, and the tail ends of the two transmission end guide rods are fixed on the door-shaped frame so as to remain horizontal and parallel to each other; two transmission end sliding blocks are freely slidably installed on the two transmission end guide rods.

[0012] Furthermore, the upper pressing wheel and the lower pressing wheel ensure that the two free end guide rods always remain horizontal and parallel.

[0013] Furthermore, a bolt hole is provided on the surface of the free end fixing plate, and the two bracket plates are fixedly installed after being matched with the first bolt hole by bolts.

[0014] Furthermore, the threaded head of the transmission end guide rod is threadably matched with the second threaded hole reserved on the transmission end assembly to achieve fixed installation.

[0015] Furthermore, the door-shaped frame is supported on the ground, and an adjusting bolt is installed at the bottom for adjusting the elevation and level.

[0016] A method for using a roller-changing device for an ultra-dense roller-pitch roller group for a roller-hearth furnace, comprising removing and installing the ultra-dense roller group as a whole from a transmission end;

[0017] The ultra-dense roller pitch furnace roller group is disassembled as a whole from the transmission end, including the following steps:

[0018] S1. Install the free end roller changing assembly and the drive end roller changing assembly separately. Adjust the adjusting bolts at the bottom of the door frame to ensure that the two drive end guide rods remain horizontal and parallel to each other.

[0019] S2. The operator pushes the free end guide rod with a buffer to slowly slide the roller group module out of the roller hearth furnace. During the sliding process, the operator observes through the mounting holes whether the upper and lower heat insulation plates in the roller hearth furnace are scraping against the furnace wall of the roller hearth furnace. If there is interference, the upper and lower heat insulation plates are adjusted in time.

[0020] S3. After the furnace roller group slides out of the furnace and into place, pass the U-shaped steel plate through the threaded holes reserved on both sides of the drive end assembly and the free end assembly, connect the drive end assembly and the free end assembly into a whole, and then remove the entire furnace roller group module from the roller changing device;

[0021] The ultra-dense roller pitch furnace roller group is installed as a whole from the transmission end, which is step S3-S1, that is, the opposite of the step of removing the ultra-dense roller pitch furnace roller group as a whole from the transmission end.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) This technology product has a simple structure and is easy to use. The operator can complete the disassembly and assembly of the ultra-dense roller set on both sides of the furnace without disassembling the furnace shell and furnace wall.

[0024] (2) This technical product can ensure that the ultra-dense roller pitch furnace roller group always remains horizontal during the disassembly and assembly process, and the sliding speed can be manually controlled. It can avoid damage to the furnace roller insulation board, furnace roller and other wearing parts to the greatest extent, and can also ensure that the refractory material of the furnace wall is not damaged.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] FIG1 is a structural diagram of an existing ultra-dense roller pitch furnace roller group;

[0028] FIG2 is a structural diagram of a roller-changing device for an ultra-dense roller pitch roller group for a roller-hearth furnace according to the present invention;

[0029] FIG3 is a side view of the structure of FIG2;

[0030] FIG4 is a schematic structural diagram of the free end roller changing assembly in FIG2 ;

[0031] FIG5 is a side view of the structure of FIG4;

[0032] FIG6 is a cross-sectional view taken along line AA in FIG5 ;

[0033] FIG7 is a schematic structural diagram of the transmission end roller changing assembly in FIG2 ;

[0034] FIG8 is a side view of the structure of FIG7;

[0035] FIG9 is a cross-sectional view taken along line BB in FIG8 ;

[0036] Figure 10 is a diagram showing the furnace roller group after removal;

[0037] FIG11 is a side view of the structure of FIG10;

[0038] FIG12 is a cross-sectional view taken along line CC in FIG11 ;

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0040] 5-free end roller changing assembly, 6-drive end roller changing assembly, 15-free end fixing plate, 52-bracket plate, 51-free end guide rod, 53-upper pressure wheel, 54-lower pressure wheel, 55-second connecting rod, 56-first connecting rod, 405-bracket, 61-drive end guide rod, 2-U-shaped square box, 63*door frame, 12*drive end assembly, 62-drive end sliding block, 19-bolt, 64*first bolt hole, 65-second threaded hole, 17-upper heat insulation board, 18-lower heat insulation board, 4-furnace wall, 7-U-shaped steel plate, 14-free end assembly. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "upper and lower", "upper", "lower", "right side", "parallel", "surface" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] The ultra-dense roller pitch furnace roller group adopts a modular design. Each module consists of several furnace rollers, drive end components and free end components. All furnace rollers are supported by the drive end components and free end components on both sides. The drive end components and free end components are fixedly installed on the U-shaped square box with full length on both sides. The specific structure is shown in Figure 1.

[0044] The furnace roller group consists of several furnace rollers, the fixed end of each furnace roller is supported by the transmission end assembly, and the free end of each furnace roller is supported by the free end assembly.

[0045] The drive end assembly is fixedly mounted on the right U-shaped box, and the drive end cover is mounted on the drive end assembly. The drive end cover is provided with a peephole for observing the operation of the components within the drive end assembly's internal cavity. The free end fixing plate is mounted on the left U-shaped box, and the free end assembly is bolted to the free end fixing plate, and the free end cover is mounted on the free end fixing plate.

[0046] The drive end assembly and free end assembly are located close to the furnace interior and are respectively installed with upper and lower heat shields to protect the metal components on the outside of the furnace. Auxiliary components are used for the installation and replacement of the furnace roller assembly.

[0047] The U-shaped square boxes on both sides are welded with steel plates and have a hollow interior. They are arranged along the length of the roller-hearth furnace. One end of each U-shaped square box is connected to an exhaust fan to remove the hot air inside, effectively reducing the temperature of the components connected to it. This modularly designed ultra-dense roller pitch furnace roller group has a compact structure and can meet the requirements of the roller roller diameter, ultra-dense roller pitch, furnace airtightness, and cooling structure while meeting the requirements of the roller-hearth furnace heating process. However, this ultra-dense roller pitch furnace roller group requires high installation accuracy, and the roller-hearth furnace hearth size and opening size are small (personnel cannot enter the furnace). During the installation process, there are problems such as the upper and lower heat insulation plates are easily damaged and the furnace rollers are easily detached from the free end components. Conventional furnace roller installation methods make it difficult to install and replace the furnace roller group.

[0048] To solve this problem, this patent develops a roller changing device and a method for using an ultra-dense roller pitch roller group for a roller hearth furnace, which can effectively solve the installation and replacement problems of this ultra-dense roller pitch roller group and is particularly suitable for small roller hearth furnaces or experimental roller hearth furnaces.

[0049] 2-12 , a roller changing device and a method for using a roller hearth furnace roller group with an ultra-dense pitch according to the present invention include a free-end roller changing assembly 5 and a drive-end roller changing assembly 6.

[0050] The free end roller changing assembly 5 includes a free end fixing plate 15, two bracket plates 52, and a free end guide rod 51; the two bracket plates 52 are fixedly installed with the free end fixing plate 15;

[0051] The two bracket plates 52 are connected by two first connecting rods 56. The two first connecting rods 56 are arranged one above the other, and are respectively installed with two upper pressure rollers 53 and two lower pressure rollers 54. The free end guide rod 51 is inserted through the gap between the upper pressure rollers 53 and the lower pressure rollers 54. The head of the free end guide rod 51 is fixed to the mounting auxiliary member 110 on the free end assembly 14. The tail of the free end guide rod 51 is connected by a second connecting rod 55, so that the two free end guide rods 51 can move synchronously.

[0052] The transmission end roller changing assembly 6 includes two transmission end guide rods 61, a U-shaped square box 2, a door-shaped frame 63, and a transmission end assembly 12; the two transmission end guide rods 61 are fixedly installed on the transmission end assembly 12 on the right side of the U-shaped square box 2 at intervals, and the tail ends of the two transmission end guide rods 61 are fixed on the door-shaped frame 63 so as to remain horizontal and parallel to each other; two transmission end sliding blocks 62 are freely slidably installed on the two transmission end guide rods 61.

[0053] The upper pressing wheel 53 and the lower pressing wheel 54 ensure that the two free end guide rods 51 always remain horizontal and parallel.

[0054] The surface of the free end fixing plate 15 is provided with bolt holes, and the two bracket plates 52 are fixedly installed by engaging the bolts 19 with the first bolt holes 64 .

[0055] Among them, the threaded head of the transmission end guide rod 61 is threadedly matched with the second threaded hole 65 reserved on the transmission end component 12 to achieve fixed installation; the second threaded hole 65 is reserved in advance on the transmission end component 12 according to the spacing of the transmission end guide rod 61.

[0056] The door-shaped frame 63 is supported on the ground, and an adjusting bolt is installed at the bottom for adjusting the elevation and level.

[0057] A method for using a roller-changing device for an ultra-dense roller-pitch roller group for a roller-hearth furnace, comprising removing and installing the ultra-dense roller group as a whole from a transmission end;

[0058] The ultra-dense roller pitch furnace roller group is disassembled from the transmission end as a whole, including the following steps:

[0059] S1. Fix and install the free-end roller-changing assembly 5 and the transmission-end roller-changing assembly 6 respectively. Adjust the adjusting bolts at the bottom of the door frame 63 to ensure that the two transmission-end guide rods 61 remain horizontal and parallel to each other.

[0060] S2. The operator pushes the free end guide rod 51 with a buffer to slowly slide the roller group module out of the roller hearth furnace. During the sliding process, the operator observes through the mounting holes whether the upper heat insulation board 17 and the lower heat insulation board 18 in the roller hearth furnace scrape against the furnace wall 4 of the roller hearth furnace. If there is interference, the upper heat insulation board 17 and the lower heat insulation board 18 are adjusted in time.

[0061] S3. After the furnace roller group slides out of the furnace and into place, insert the U-shaped steel plate 7 through the threaded holes reserved on both sides of the transmission end assembly 12 and the free end assembly 14, connect the transmission end assembly 12 and the free end assembly 14 into a whole, and then remove the entire furnace roller group module from the roller changing device;

[0062] The ultra-dense roller pitch furnace roller group is installed as a whole from the transmission end, which is step S3-S1, that is, the opposite step of removing the ultra-dense roller pitch furnace roller group as a whole from the transmission end.

[0063] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace, characterized in that: It comprises a free end roller changing assembly (5) and a transmission end roller changing assembly (6); The free end roller changing assembly (5) comprises a free end fixing plate (15), two bracket plates (52), and a free end guide rod (51); the two bracket plates (52) are fixedly mounted on the free end fixing plate (15); The two bracket plates (52) are connected by two first connecting rods (56), which are arranged up and down, and are respectively installed with two upper pressure wheels (53) and two lower pressure wheels (54); the free end guide rod (51) is inserted through the gap between the upper pressure wheel (53) and the lower pressure wheel (54), the head of the free end guide rod (51) is fixed on the installation auxiliary part (110) on the free end assembly (14), and the tail of the free end guide rod (51) is connected by a second connecting rod (55), so that the two free end guide rods (51) can move synchronously; The transmission end roller changing assembly (6) comprises two transmission end guide rods (61), a U-shaped square box (2), a door-shaped frame (63), and a transmission end assembly (12); the two transmission end guide rods (61) are fixedly installed on the transmission end assembly (12) on the right side of the U-shaped square box (2) at intervals, and the tail ends of the two transmission end guide rods (61) are fixed on the door-shaped frame (63) so as to keep them horizontal and parallel to each other; two transmission end sliding blocks (62) are freely slidably installed on the two transmission end guide rods (61).

2. The roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace according to claim 1, characterized in that: The upper pressing wheel (53) and the lower pressing wheel (54) ensure that the two free end guide rods (51) always remain horizontal and parallel.

3. The roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace according to claim 1, characterized in that: The surface of the free end fixing plate (15) is provided with a bolt hole, and the two bracket plates (52) are fixedly installed after being matched with the first bolt hole (64) through the bolts (19).

4. The roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace according to claim 1, characterized in that: The threaded head of the transmission end guide rod (61) is threadedly matched with the second threaded hole (65) reserved on the transmission end component (12) to achieve fixed installation.

5. The roller changing device for an ultra-dense roller pitch roller group for a roller hearth furnace according to claim 1, characterized in that: The door-shaped frame (63) is supported on the ground, and an adjusting bolt is installed at the bottom for adjusting the elevation and level.

6. A method for using a roller-changing device for an ultra-close-pitch roller group for a roller-hearth furnace, for using the roller-changing device for an ultra-close-pitch roller group for a roller-hearth furnace according to any one of claims 1 to 5, comprising removing and installing the entire ultra-close-pitch roller group from a drive end, characterized in that: The ultra-dense roller pitch furnace roller group is disassembled as a whole from the transmission end, including the following steps: S1. The free end roller changing assembly (5) and the transmission end roller changing assembly (6) are fixedly installed respectively, and the adjusting bolts at the bottom of the door frame (63) are adjusted to ensure that the two transmission end guide rods (61) remain horizontal and parallel to each other; S2. The operator pushes the free end guide rod (51) with a buffer to slowly slide the roller group module out of the roller hearth furnace. During the sliding process, the operator observes through the mounting holes whether the upper heat insulation plate (17) and the lower heat insulation plate (18) in the roller hearth furnace scrape against the furnace wall (4) of the roller hearth furnace. If there is interference, the operator promptly adjusts the upper heat insulation plate (17) and the lower heat insulation plate (18); S3. After the furnace roller group slides out of the furnace and into place, the U-shaped steel plate (7) is passed through the threaded holes reserved on both sides of the transmission end assembly (12) and the free end assembly (14), the transmission end assembly (12) and the free end assembly (14) are connected into a whole, and then the entire furnace roller group module is removed from the roller changing device; The ultra-dense roller pitch furnace roller group is installed as a whole from the transmission end, which is step S3-S1, that is, the opposite of the step of removing the ultra-dense roller pitch furnace roller group as a whole from the transmission end.

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