Rapid replacement system and method for muffle tube of vertical bright annealing furnace

Abstract

The invention discloses a rapid replacement system and method for a muffle tube of a vertical bright annealing furnace. The muffle tube comprises an end flange located at the top of the muffle tube and a middle flange located in the middle of the muffle tube. The replacing system comprises a muffle tube lifting appliance, a muffle tube clamp, a heating cover operation platform, an old muffle tube storage platform and a muffle tube spare part storage platform. In a plant where the annealing furnace is located, a new muffle tube is prepared, and an old muffle tube storage platform used for storing the old muffle tube is arranged; when the muffle pipe in the external heating furnace is damaged, the muffle pipe can be replaced in time, and the annealing furnace can run stably; and only the old muffle tube needs to be taken down and the new muffle tube needs to be installed, so that the time for spare parts and transporting parts can be saved, the downtime of the annealing furnace is reduced, and the occupied space of the old muffle tube in a plant can be reduced when the new muffle tube is installed. In addition, the disassembly and assembly of the muffle pipe are divided into two steps, so that the requirement for the height stroke of a hoisting machine is reduced, and the requirement for the installation operation of the muffle pipe with a larger length interval and a larger plant height interval can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical bright annealing furnaces, and particularly to a rapid replacement system and method for muffle tubes of vertical bright annealing furnaces. Background Art

[0002] As a core device in the field of metal heat treatment, the vertical bright annealing furnace occupies an irreplaceable position in the bright annealing process of stainless steel and non-ferrous metal strip steel due to its unique technical characteristics. Such an annealing furnace usually has a vertical layout structure, and includes multiple components such as an inlet sealing device, a heating section, a cooling section, a top roll chamber, a strip return channel, and an outlet sealing chamber from bottom to top. Among them, the heating section is the key area for realizing the bright annealing of the strip. By means of indirect heating, relying on the muffle tube filled with hydrogen inside and with a length between 16 and 36 meters, the strip is uniformly heated during the vertical operation process, and thus a high-quality bright surface is obtained.

[0003] The muffle tube needs to withstand extremely harsh working conditions during the entire annealing process. On the one hand, its interior is in a hydrogen-containing atmosphere environment, forming a special environmental system with the external air; on the other hand, it needs to operate continuously for a long time in a high-temperature environment above 1000 °C, while bearing its own huge weight load. Under the combined action of these factors, various damages and deformations will inevitably occur to the muffle tube. Such as necking phenomenon caused by high-temperature creep, wall thickness thinning, cracking of the weld under long-term stress, and overall banana-shaped bending deformation, etc. These defects will cause the cross-sectional shape of the muffle tube to change, having a serious adverse impact on its normal use. When these problems develop to the point where they cannot be solved by repair means, the replacement of the muffle tube becomes an inevitable requirement.

[0004] However, the replacement operation of muffle tube spare parts faces many obstacles and the process is extremely complicated. Firstly, due to the large size and heavy weight of the muffle tube, traditional lifting equipment and methods are often difficult to effectively apply when dealing with its deformation conditions. After the muffle tube is bent and deformed, ordinary lifting fixtures are difficult to accurately fit with the flange surface and cannot effectively bear the weight of the muffle tube, resulting in the inability to carry out the lifting operation safely and smoothly. Secondly, the structural characteristics of the annealing furnace itself impose great restrictions on the replacement of the muffle tube. The vertical bright annealing furnace can reach a height of 60 meters, the internal space is relatively cramped, and the layout of each component is closely connected. This means that when carrying out the replacement operation of the muffle tube, the operating space is extremely limited, and any negligence may damage the surrounding equipment and components.

[0005] Particularly troublesome is that in actual production scenarios, when the length of the muffle tube is long and the height of the factory building is limited, the traditional replacement method is even more difficult to implement. Since there is no way to provide sufficient vertical space to completely lift out the deformed muffle tube, the replacement work reaches an impasse, having a serious negative impact on the production progress and the normal maintenance of the equipment.

[0006] In the existing technical system, the commonly adopted method at present is to translate the heating section furnace body, lift out the muffle tube, and cooperate with the muffle tube transfer trolley on the ground to receive the muffle tube. Specifically, after separating the heating section furnace body from the upper and lower furnace shells, the muffle tube is lifted by hoisting operations (when the length of the muffle tube is long and the height of the factory building is limited, special fixtures are also required and the hoisting is carried out in two steps). Subsequently, workers also need to prepare tools such as muffle tube transfer carts on the ground for docking operations, slowly lower the muffle tube so that the bottom of the muffle tube is placed into the receiving bucket of the cart, and then hoist and remove it after the old muffle tube is in a horizontal state (the factory building also needs to reserve enough space to place the old muffle tube). After that, repeat the corresponding actions to hoist the new muffle tube spare part onto the muffle tube transfer cart and complete the replacement operation of the muffle tube according to the reverse process. Although this method is applicable to the initial installation of the muffle tube, when replacing muffle tube spare parts subsequently, it requires a large amount of time and labor costs. Summary of the Invention

[0007] In view of the above-mentioned defects existing in the prior art, a rapid replacement system and method for the muffle tube of a vertical bright annealing furnace are provided, which simplifies the replacement process of the muffle tube spare part, ensures the stable operation state of the annealing furnace, improves the production efficiency and reduces the maintenance cost.

[0008] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0009] In the first aspect, a rapid replacement system for the muffle tube of a vertical bright annealing furnace, the muffle tube includes an end flange at the top of the muffle tube and a middle flange in the middle of the muffle tube; it includes

[0010] a muffle tube hoist and a muffle tube clamp. The muffle tube hoist is connected to the top flange, and the muffle tube clamp is clamped in the muffle tube clamping area below the middle flange;

[0011] a heating hood operation platform. The old muffle tube is installed in the external heating section furnace body, and a disassembly hole for replacing the old muffle tube is provided at the top of the external heating section furnace body. The heating hood operation platform is arranged on the periphery of the disassembly hole; when replacing the muffle tube, the heating section furnace body is fixedly installed on the external muffle tube transfer trolley;

[0012] The old muffle tube storage platform and the spare muffle tube storage platform are both provided with storage holes for placing muffle tubes, and a support area for supporting the muffle tube fixture is arranged on the periphery of the storage holes; a muffle tube fixture is installed on the old muffle tube or the new muffle tube, the old muffle tube or the new muffle tube is placed in the storage hole, and the muffle tube fixture is supported on the support area.

[0013] According to the above technical solution, a plurality of support wheels are arranged on the heating hood operation platform, and the muffle tube fixture is placed on the support wheels; the two parts of the muffle tube fixture are driven by the support wheels to approach or move away from each other.

[0014] According to the above technical solution, the muffle tube fixture includes two C-shaped fixture bodies and a fastener for connecting the two C-shaped fixture bodies; the side surface of the C-shaped fixture body is attached to the clamping area below the intermediate flange, and the upper surface of the C-shaped fixture body is supported on the bottom of the intermediate flange; the support wheels are divided into front and rear groups, and the support wheels in each group are respectively distributed at intervals at the bottom of each C-shaped fixture body.

[0015] According to the above technical solution, it further includes a bracket, and the upper surface of the bracket is flush with the highest point of the support wheels; the bracket is arranged at the bottom of the joint after the two C-shaped fixture bodies are attached.

[0016] According to the above technical solution, the support wheel includes a base, a rotating shaft supported on the base through a bearing, and a support wheel body fixed on the rotating shaft.

[0017] According to the above technical solution, the old muffle tube storage platform and the spare muffle tube storage platform are arranged on the side of the muffle tube translation trolley track.

[0018] According to the above technical solution, a pressing plate connected to the muffle tube fixture is arranged on the top of the intermediate flange.

[0019] In the second aspect, a method for quickly replacing the muffle tube of a vertical bright annealing furnace adopts the vertical bright annealing furnace muffle tube quick replacement system as described above; it includes a disassembly process and a replacement process, and the disassembly process is as follows:

[0020] The muffle tube sling is connected to the end flange of the old muffle tube, the hook of the external hoisting machinery is connected to the muffle tube sling, and the muffle tube is hoisted to a set height to ensure that the bottom surface of the middle flange is higher than the upper surface of the muffle tube fixture;

[0021] The muffle tube fixture clamps the clamping area of the muffle tube; the hook of the external hoisting machinery is removed from the muffle tube sling and connected to the muffle tube fixture;

[0022] The hoisting machinery transports the old muffle tube to the storage hole of the old muffle tube storage platform, and the muffle tube fixture of the old muffle tube is supported on the support area.

[0023] According to the above technical solution, if the length of the muffle tube is less than the lifting height of the lifting machinery, the replacement process is as follows:

[0024] If the muffle tube fixture is fixedly connected to the new muffle tube, the muffle tube fixture and the new muffle tube must be separated first;

[0025] The hook of the lifting machine is connected to the muffle tube lifting fixture on the end flange of the new muffle tube;

[0026] The new muffle tube is lifted, translated, and lowered through the disassembly hole by a lifting machine, and the installation of the new muffle tube is completed.

[0027] According to the above technical solution, if the length of the muffle tube is not less than the lifting height of the lifting machinery, the replacement process is as follows:

[0028] The hook of the lifting machine is connected to the flange clamp of the middle flange of the new muffle tube;

[0029] The new muffle tube is lifted, translated and lowered to the disassembly hole by a lifting machine, and the muffle tube fixture of the new muffle tube is supported on the heating cover operating platform;

[0030] The hook of the lifting machine is removed from the muffle tube clamp and connected to the muffle tube hanger, and the muffle tube clamp and the new muffle tube are separated; and the muffle tube clamp is split into two parts, which are separated by the support wheel;

[0031] The new muffle tube is further lowered by the lifting machinery to pass through the disassembly hole, and the installation of the new muffle tube is completed.

[0032] The present invention has the following beneficial effects:

[0033] 1. Set up an old muffle tube storage platform and a muffle tube spare parts storage platform. The old muffle tube storage platform is used to store the replaced old muffle tubes, and the muffle tube spare parts storage platform is used to store the new muffle tubes to be replaced. When the old muffle tubes in the external heating furnace section are damaged, the old muffle tubes are directly removed by a lifting machine and stored on the old muffle tube storage platform, and the new muffle tubes are installed in the external heating furnace section, and then the external heating furnace continues to operate. In this system, new muffle tubes are always available in the plant where the annealing furnace is located, and an old muffle tube storage platform for storing old muffle tubes is provided; when the muffle tubes in the external heating furnace are damaged, they can be replaced in time, and the annealing furnace can be ensured to operate smoothly; compared with the scheme in the prior art in which the new muffle tubes are transported to the plant, the old muffle tubes are removed, the new muffle tubes are installed, and the old muffle tubes are transported out of the plant; only the old muffle tubes need to be removed and the new muffle tubes installed, which can save the time for spare parts and transportation of parts, reduce the downtime of the annealing furnace, and can also reduce the space occupied by the old muffle tubes in the plant when the new muffle tubes are installed.

[0034] 2. By setting up the muffle tube fixture and the muffle tube sling, the disassembly and assembly of the muffle tube can be divided into two steps, thus reducing the requirement for the height stroke of the hoisting machinery and meeting the installation operations of muffle tubes with a larger length range and a larger plant height range.

[0035] 3. By setting up the support wheels and brackets, it is convenient for the clamping and releasing of the muffle tube fixture.

[0036] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the following takes the preferred embodiments of the present invention and combines with the attached drawings to explain in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their attached drawings. Brief Description of the Drawings

[0037] The attached drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0038] Figure 1 , 3 , Figures 5 and 7 are the state change diagrams of the heating hood operation platform during the disassembly process of the embodiments provided by the present invention;

[0039] Figure 2 , 4 , Figures 6 and 8 are the state change diagrams of the heating hood operation platform, the old muffle tube storage platform, and the muffle tube spare parts storage platform during the disassembly process of the embodiments provided by the present invention;

[0040] Figure 9 is the top view of the system of the embodiment provided by the present invention;

[0041] Figure 10 is the top view of the heating hood operation platform of the embodiment provided by the present invention;

[0042] Figure 11 is the cross-sectional view of the heating hood operation platform of the embodiment provided by the present invention;

[0043] In the figures, 1. Muffle tube; 1-1. End flange; 1-2. Middle flange; 1-3. Old muffle tube; 1-4. New muffle tube; 2. Muffle tube sling; 3. Muffle tube fixture; 4. Heating hood operation platform; 5. Heating section furnace body; 5-1. Disassembly hole; 6. Old muffle tube storage platform; 7. Muffle tube spare parts storage platform; 8. Support wheel; 9. Bracket; 10. Hoisting machinery. Detailed Description of the Preferred Embodiments

[0044] The following combines with the attached Figures 1-11The principles and features of the present invention are described. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be more clear according to the following description and the claims. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0045] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0047] Refer to Figures 1 to 11 As shown, the present invention provides a rapid replacement system for the muffle tube of a vertical bright annealing furnace.

[0048] Embodiment 1

[0049] The muffle tube 1 includes an end flange 1-1 located at the top of the muffle tube and a middle flange 1-2 located in the middle of the muffle tube; including

[0050] A muffle tube lifting device 2 and a muffle tube clamping device 3, the muffle tube lifting device is connected to the top flange, and the muffle tube clamping device clamps the muffle tube clamping area below the middle flange;

[0051] A heating hood operation platform 4, the old muffle tube is installed in the external heating section furnace body 5, a disassembly hole 5-1 for replacing the old muffle tube is provided at the top of the external heating section furnace body, and the heating hood operation platform is arranged on the periphery of the disassembly hole; when replacing the muffle tube, the heating section furnace body is fixedly installed on the external muffle tube trolley.

[0052] The old muffle tube storage platform 6 and the muffle tube spare parts storage platform 7 are both provided with storage holes for placing the muffle tubes, and support areas for supporting the muffle tube clamps are provided around the storage holes; the muffle tube clamps are installed on the old muffle tubes 1-3 or the new muffle tubes 1-4, the old muffle tubes or the new muffle tubes are placed in the storage holes, and the muffle tube clamps are supported on the support areas.

[0053] In this embodiment, an old muffle tube storage platform and a muffle tube spare parts storage platform are set up. The old muffle tube storage platform is used to store the replaced old muffle tubes, and the muffle tube spare parts storage platform is used to store the new muffle tubes to be replaced. When the old muffle tubes in the external heating furnace section are damaged, the old muffle tubes are directly removed by the lifting machinery 10 and stored on the old muffle tube storage platform, and the new muffle tubes are installed in the external heating furnace section, and then the external heating furnace continues to operate. In this system, new muffle tubes are always available in the plant where the annealing furnace is located, and an old muffle tube storage platform for storing old muffle tubes is provided; when the muffle tubes in the external heating furnace are damaged, they can be replaced in time, and the annealing furnace can be ensured to operate smoothly; compared with the scheme in the prior art in which the new muffle tubes are transported to the plant, the old muffle tubes are removed, the new muffle tubes are installed, and the old muffle tubes are transported out of the plant; only the old muffle tubes need to be removed and the new muffle tubes installed, which can save the time for spare parts and transportation of parts, reduce the downtime of the annealing furnace, and can also reduce the space occupied by the old muffle tubes in the plant when the new muffle tubes are installed.

[0054] In addition, by setting up a muffle tube clamp and a muffle tube hoist, the disassembly and assembly of the muffle tube can be divided into two steps, thereby reducing the demand for the height stroke of the hoisting machinery and meeting the muffle tube installation operations with a larger length range and a larger plant height range.

[0055] Example 2

[0056] The structure and principle of Example 2 are similar to those of Example 1, except that: in order to facilitate the clamping of the muffle tube clamp on the clamping area, a plurality of support wheels 8 are provided on the heating hood operating platform, and the muffle tube clamp is placed on the support wheels; the two parts of the muffle tube clamp are driven by the support wheels to move closer to or away from each other.

[0057] The supporting wheel comprises a base, a rotating shaft supported on the base through a bearing, and a supporting wheel body fixed on the rotating shaft.

[0058] Preferably, the muffle tube clamp includes two C-type clamp bodies and fasteners for connecting the two C-type clamp bodies; the side surfaces of the C-type clamp bodies are attached to the clamping area below the middle flange, and the upper surface of the C-type clamp bodies is supported on the bottom of the middle flange; the support wheels are divided into two groups, front and rear, and the support wheels in each group are spaced apart and distributed at the bottom of each C-type clamp body.

[0059] When a new muffle tube needs to be replaced, a plurality of support wheels are fixedly installed on the operation platform of the heating hood, and the C-shaped fixture body is placed on the support wheels. By the rolling of the support wheels, the C-shaped fixture bodies are driven to approach each other, so as to achieve the purpose of clamping the old muffle tube; or the C-shaped fixture bodies are driven to move away from each other, so as to achieve the purpose of releasing the clamping of the old muffle tube.

[0060] Since the two C-shaped fixture bodies are symmetrically arranged on both sides of the muffle tube, support wheels cannot be arranged on the symmetry line of the C-shaped fixture bodies; due to the limitation of the structure of the C-shaped fixture bodies themselves, supports need to be arranged on the symmetry line. It also includes a bracket 9, the upper surface of the bracket is flush with the highest point of the support wheel; the bracket is arranged at the bottom of the joint after the two C-shaped fixture bodies are fitted together. After the two C-shaped fixture bodies are connected by fasteners, the two C-shaped fixture bodies are supported on the bracket after being fitted together.

[0061] The muffle tube is supported on the muffle tube fixture by its own gravity; however, the two are not fixedly connected. To ensure safety, a pressing plate is provided above the intermediate flange, and the pressing plate is connected to the muffle tube fixture by fasteners. The muffle tube fixture and the pressing plate clamp the intermediate flange between the two.

[0062] To facilitate the hoisting of the new muffle tube and the old muffle tube, the old muffle tube storage platform and the muffle tube spare part storage platform are arranged on the side of the track of the muffle tube translation trolley.

[0063] The present invention also provides a method for quickly replacing the muffle tube of a vertical bright annealing furnace

[0064] As Figures 1 to 8 shown, first, carry out the disassembly work of the heating section furnace body and the old muffle tube: it is necessary to ensure that the annealing furnace is shut down and powered off, prepare tools, and set warning signs. Then disconnect the heating section furnace body and the old muffle tube as a whole from the upper and lower furnace bodies and disassemble the connecting components. Then check the muffle tube translation trolley first and clean up sundries to ensure that the heating section furnace body and the trolley are fixed. Finally, when the muffle tube translation trolley moves, check the motor and the guide rail, start the motor to drive the muffle tube translation trolley to translate along the guide rail and control the speed and direction, and continue to translate until it moves out of the outer circle of the annealing furnace production area and is fixed. The whole process needs to strictly follow the operation specifications of each link to ensure safety and smooth implementation. When the muffle tube translation trolley has reached the non-working position and stopped, stop and fix the wheels of the muffle tube trolley.

[0065] Next, install the muffle tube sling on the end flange of the old muffle tube, connect the hook of the external hoisting machinery to the muffle sling, and use the hoisting machinery to lift out the old muffle tube. When the old muffle tube is lifted to expose the middle flange surface, the muffle tube clamp moves towards the center line through the support wheels on the top operating platform of the heating hood and clamps the muffle tube. Complete the connection and fixation of the two C-type clamp bodies on the support wheels and brackets; then remove the hook of the muffle sling on the end flange of the muffle tube, reconnect the hook of the hoisting machinery to the muffle tube clamp on the middle flange, and continue to lift out the muffle tube. Pass the muffle tube through the storage hole and place it on the old muffle tube storage platform; when the contact area between the muffle tube clamp and the support area of the old muffle tube storage platform is reached, manually fix the muffle tube clamp and the steel structure of the old muffle tube storage platform with bolts to complete the storage of the old muffle tube.

[0066] Next, from the other side of the muffle tube spare part storage platform (not shown in the figure), according to the different lengths of the muffle tubes, it is divided into two hoisting methods:

[0067] When the muffle tube is short in length, loosen the pressure plate connected to the muffle tube clamp on the middle flange. The muffle tube clamp no longer clamps the muffle tube, but the connection between the muffle tube clamp and the steel structure of the storage platform is maintained. Then, use the hoisting machinery to lift the muffle sling on the end flange of the new muffle tube and lift out the new muffle tube located inside the muffle tube spare part storage platform; directly lift the new muffle tube into the steel structure of the heating section furnace body to complete the replacement of the new muffle tube.

[0068] When the muffle tube is long in length and the height of the workshop is insufficient; hook the hook of the hoisting machinery on the muffle tube clamp of the middle flange of the new muffle tube, loosen the connection between the new muffle tube clamp and the steel structure of the muffle tube spare part storage platform, and lift out the new muffle tube. When the new muffle tube is being placed into the steel structure of the heating section furnace body, when the muffle tube clamp reaches the support wheels and brackets of the heating hood operating platform, remove the hook connected to the muffle tube clamp and connect the hook to the muffle sling on the end flange; and use the hoisting machinery to lift the new muffle tube. Then, disassemble the muffle tube clamp into two parts on the support wheels and brackets, and use the support wheels to separate the two parts of the muffle tube clamp so that the new muffle tube can continue to be lifted down into the steel structure of the heating section furnace body to complete the replacement process of the muffle tube spare parts.

[0069] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any ordinary technician in the industry can smoothly implement the present invention according to the illustrations in the specification and the above description. However, any minor changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A quick replacement system for a muffle tube of a vertical bright annealing furnace, wherein the muffle tube comprises an end flange located at the top of the muffle tube and a middle flange located in the middle of the muffle tube; the characteristics are: include a muffle tube hanger and a muffle tube clamp, the muffle tube hanger is connected to the top flange, and the muffle tube clamp is clamped in the muffle tube clamping area below the middle flange; Heating cover operating platform, the old muffle tube is installed in the external heating section furnace body, the top of the external heating section furnace body is provided with a disassembly hole for replacing the old muffle tube, and the heating cover operating platform is arranged around the disassembly hole; when replacing the muffle tube, the heating section furnace body is fixedly installed on the external muffle tube translation trolley; The old muffle tube storage platform and the muffle tube spare parts storage platform are both provided with storage holes for placing the muffle tubes, and a supporting area for supporting the muffle tube clamp is provided around the storage hole; the muffle tube clamp is installed on the old muffle tube or the new muffle tube, the old muffle tube or the new muffle tube is placed in the storage hole, and the muffle tube clamp is supported on the supporting area.

2. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 1 is characterized in that: A plurality of supporting wheels are arranged on the heating cover operating platform, and the muffle tube clamp is placed on the supporting wheels; the two parts of the muffle tube clamp are driven by the supporting wheels to move closer to or farther from each other.

3. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 2 is characterized in that: The muffle tube clamp includes two C-type clamp bodies and fasteners for connecting the two C-type clamp bodies; the side surfaces of the C-type clamp bodies are attached to the clamping area below the middle flange, and the upper surface of the C-type clamp bodies is supported on the bottom of the middle flange; the support wheels are divided into two groups, front and rear, and the support wheels in each group are spaced apart and distributed at the bottom of each C-type clamp body.

4. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 3 is characterized in that: It also includes a bracket, the upper surface of which is flush with the highest point of the support wheel; the bracket is arranged at the bottom of the joint after the two C-shaped clamp bodies are attached.

5. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 2 is characterized in that: The supporting wheel comprises a base, a rotating shaft supported on the base through a bearing, and a supporting wheel body fixed on the rotating shaft.

6. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 1 is characterized in that: The old muffle tube storage platform and the muffle tube spare parts storage platform are arranged on the side of the muffle tube translation trolley track.

7. The muffle tube quick replacement system for a vertical bright annealing furnace according to claim 1 is characterized by: A pressing plate connected to the muffle tube clamp is arranged on the top of the middle flange.

8. A method for quickly replacing a muffle tube of a vertical bright annealing furnace, characterized in that: A vertical bright annealing furnace muffle tube quick replacement system as described in any one of claims 1 to 7 is used; the system includes a disassembly process and a replacement process, and the disassembly process is as follows: The muffle tube hanger is connected to the end flange of the old muffle tube, the hook of the external lifting machine is connected to the muffle tube hanger, and the muffle tube is lifted to a set height to ensure that the bottom surface of the middle flange is higher than the upper surface of the muffle tube clamp; The muffle tube clamp is used to clamp the clamping area of ​​the muffle tube; the hook of the external lifting machine is removed from the muffle tube hanger and connected to the muffle tube clamp; The old muffle tube is transported to the storage hole of the old muffle tube storage platform by a lifting machine, and is supported in the supporting area by the muffle tube clamp of the old muffle tube.

9. The method for quickly replacing the muffle tube of a vertical bright annealing furnace according to claim 8, characterized in that: If the muffle tube length is less than the lifting height of the lifting machine, the replacement process is as follows: If the muffle tube fixture is fixedly connected to the new muffle tube, the muffle tube fixture and the new muffle tube must be separated first; The hook of the lifting machine is connected to the muffle tube lifting fixture on the end flange of the new muffle tube; The new muffle tube is lifted, translated, and lowered through the disassembly hole by a lifting machine, and the installation of the new muffle tube is completed.

10. The method for quickly replacing the muffle tube of a vertical bright annealing furnace according to claim 8, characterized in that: If the length of the muffle tube is not less than the lifting height of the lifting machinery, the replacement process is as follows: The hook of the lifting machine is connected to the flange clamp of the middle flange of the new muffle tube; The new muffle tube is lifted, translated and lowered to the disassembly hole by a lifting machine, and the muffle tube fixture of the new muffle tube is supported on the heating cover operating platform; The hook of the lifting machine is removed from the muffle tube clamp and connected to the muffle tube hanger, and the muffle tube clamp and the new muffle tube are separated; and the muffle tube clamp is split into two parts, which are separated by the support wheel; The new muffle tube is further lowered by the lifting machinery to pass through the disassembly hole, and the installation of the new muffle tube is completed.

Images