Combined slab continuous casting machine fan-shaped section replacement lifting appliance

Abstract

The utility model discloses a combined type slab continuous casting machine fan-shaped section replacing lifting appliance which comprises a long lifting appliance structure, a short lifting appliance structure and a lifting appliance supporting device, and a plurality of guide wheels matched with fan-shaped section replacing guide rails are arranged in the long lifting appliance structure and the short lifting appliance structure. First lifting points matched with an external crown block lifting hook are arranged at the tops of the long lifting appliance structure and the short lifting appliance structure, and the top of the long lifting appliance structure or the top of the short lifting appliance structure is connected to the crown block lifting hook according to requirements; first connecting assemblies matched with each other are arranged between the bottom of the short lifting appliance structure and the top of the long lifting appliance structure, and the short lifting appliance structure is connected between the top of the long lifting appliance structure and a crown block lifting hook according to requirements; the bottom of the long lifting appliance structure is connected with the external fan-shaped section; the lifting appliance supporting device is arranged on a bracket on the side edge of the fan-shaped section replacement guide rail and has two states of being supported on the fan-shaped section replacement guide rail and being separated from the fan-shaped section replacement guide rail; and when the lifting appliance supporting device is supported on the fan-shaped section replacement guide rail, the top of the long lifting appliance structure is supported on the lifting appliance supporting device. And the long and short lifting appliances and the lifting appliance supporting device are in relay fit, so that the fan-shaped section is lifted and replaced on line.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, specifically to a replacement lifting device for the sector section of a combined slab continuous casting machine. Background Technology

[0002] In a straight-arc continuous casting machine, the installation and replacement of the sector sections in the arc zone and straightening zone are carried out along the radius of curvature of the continuous casting machine. The sector section replacement lifting tool and the extraction guide rail are specially designed for this purpose.

[0003] Currently, the steel plant's continuous casting workshop is undergoing equipment upgrades based on the existing workshop environment. However, the original continuous casting workshop suffers from limited space, low overhead crane limits, and excessively long bending of the guide rails for replacing the new fan-shaped sections, which cannot meet the requirements for hoisting and replacing the new slab fan-shaped sections after the upgrade.

[0004] Under the premise that the basic environment remains unchanged, it is necessary to meet the requirements of low user investment, convenient product upgrades and transformations, and diversified product markets. Conventional sector-shaped hoisting systems obviously cannot achieve this. Utility Model Content

[0005] To address the aforementioned deficiencies in existing technologies, a modular slab continuous casting machine sector segment replacement lifting device is provided. Under limited conditions, the lifting and replacement of sector segments can be completed online through relay coordination between long and short lifting devices and lifting device support devices.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] The combined slab continuous casting machine sector section replacement lifting tool is used for replacing sector sections in straight-arc continuous casting machines. The straight-arc continuous casting machine includes sector sections and sector section replacement guide rails.

[0008] The system includes a long lifting device, a short lifting device, and a lifting device support device. Both the long and short lifting devices have several guide wheels that match the changing guide rails of the sector segment. Each of the long and short lifting devices has a first lifting point at its top that matches the hook of an external gantry crane. The top of either the long or short lifting device can be connected to the gantry crane hook as needed. A matching first connecting component is located between the bottom of the short lifting device and the top of the long lifting device, allowing the short lifting device to connect between the top of the long lifting device and the gantry crane hook as needed. The bottom of the long lifting device is connected to the external sector segment. The lifting device support device is mounted on a bracket on the side of the changing guide rail of the sector segment, and can be in two states: supported on the changing guide rail and detached from it. When the lifting device support device is supported on the changing guide rail, the top of the long lifting device is supported on the lifting device support device.

[0009] According to the above technical solution, each sector segment is provided with two sector segment replacement guide rails; a lifting device is provided on the outer support of each of the two sector segment replacement guide rails, the lifting device is provided with an arc-shaped support groove, and support shafts are provided on both sides of the top of the long lifting structure, with guide wheels located at the outer ends of the support shafts; when the lifting device is supported on the sector segment replacement guide rail, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rail.

[0010] According to the above technical solution, the lifting device includes a support, a pin, and a guide wheel support frame. The support is fixed on an external bracket on the outside of the sector section replacement guide rail. The guide wheel support frame includes a support part and a handle part, which are fixedly connected, and an arc-shaped support groove is provided on the support part. The guide wheel support frame is rotatably connected to the support through the pin. The handle part controls the support part to be supported on the sector section replacement guide rail and to detach from the sector section replacement guide rail.

[0011] According to the above technical solution, the guide wheel support frame adopts an L-shaped bracket. The vertical section of the L-shaped bracket serves as the handle, and the horizontal section of the L-shaped bracket serves as the support. An arc-shaped support groove is provided at the end of the horizontal section. The connection between the vertical section and the horizontal section is rotatably connected to the support by a pin.

[0012] According to the above technical solution, both the long lifting device structure and the short lifting device structure include a lifting beam and a chain plate and chain shaft structure, with the first lifting point located on the lifting beam; the first connecting assembly is located between the lifting beam of the long lifting device structure and the chain plate and chain shaft structure of the short lifting device structure; and the connecting pin of the outer fan-shaped section lifting plate is connected to the bottom of the chain plate and chain shaft structure of the long lifting device structure.

[0013] According to the above technical solution, the chain plate and chain shaft structure includes several parallel chain shafts, chain plates connected between two adjacent chain shafts or connected to the bottom chain shaft, and guide wheels rotatably connected to the ends of the chain shafts; one or two chain plates are connected to both ends of two adjacent chain shafts and inside the guide wheels; the chain shaft is set at the bottom of the chain plate and chain shaft structure of the short lifting device structure, and the chain shaft is connected to the first connecting assembly; the chain plate and chain shaft structure of the long lifting device structure is set at the bottom, and the chain plate is connected to the connecting pin of the outer fan-shaped section lifting plate; the spacing between the guide wheels on both sides of the chain shaft and the size of the guide wheels match the size and position of the replacement guide wheels of the fan-shaped section.

[0014] According to the above technical solution, the first connecting component includes a plate hook and a hook point that matches the plate hook. The plate hook is located on the lowest chain shaft of the short lifting device structure, and the hook point is located on the lifting beam of the long lifting device structure.

[0015] According to the above technical solution, each sector segment is provided with two sector segment replacement guide rails; a lifting device is provided on the outer support of each of the two sector segment replacement guide rails, the lifting device is provided with an arc-shaped support groove, and support shafts are provided on both sides of the top of the long lifting structure, with guide wheels located at the outer ends of the support shafts; when the lifting device is supported on the sector segment replacement guide rail, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rail;

[0016] The hook point is located on the support shaft.

[0017] According to the above technical solution, in the chain plate and chain shaft structure, the chain plates adopt a structure in which single plates and double plates are arranged alternately, and at the connection of the chain plates on the chain shaft, the single plate is located between the double plates; in the long lifting device structure, the last chain plate of the chain shaft and chain plate structure is a single plate; in the short lifting device, the last chain plate of the chain shaft and chain plate structure is a double plate, and the two plate hooks are respectively connected to the chain shaft at the bottom of the last chain plate, and the plate hooks are located between the double plates.

[0018] This utility model has the following beneficial effects:

[0019] 1. When the length of the long lifting device is insufficient, a short lifting device is added between the overhead crane hook and the long lifting device using a lifting device support system. This allows for the installation and replacement of more distant sector sections. The lifting device support system, acting as a transitional device in relay operation, can quickly and conveniently provide temporary fixed support for the long lifting device, ensuring that the long and short lifting devices can be smoothly extended and used, enabling online lifting and replacement of upgraded slab sector sections. It has the following advantages:

[0020] First, by providing temporary support through the guide wheel support device, it is possible to conveniently realize the combination of lifting tools for changing long and short sector sections, and to realize relay operation and lifting in the sector section guide rail;

[0021] Secondly, based on the existing factory buildings and overhead cranes, the design changes are minimal, which can save the company's investment costs to the greatest extent.

[0022] Third, ensure that existing production is not affected by the construction or renovation of continuous casting machine production lines, realize the upgrade and transformation of billet continuous casting machines to slab continuous casting machines, quickly respond to the diversified needs of users' product markets, and enhance the company's economic benefits and market influence.

[0023] 2. The lifting point is set on the support shaft, which can then be connected to the short lifting device. At the same time, the guide wheel at the end of the support shaft is supported on the lifting device. The connection point between the long and short lifting devices, as well as the support point of the long lifting device on the lifting device, are all set on the support shaft, which simplifies the lifting device structure and facilitates the connection between the short and long lifting devices.

[0024] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0026] Figure 1 This is a structural schematic diagram of an embodiment provided by this utility model;

[0027] Figure 2 This is a side view of the long lifting device structure provided in an embodiment of this utility model;

[0028] Figure 3 This is a front view of the long lifting device structure provided in an embodiment of this utility model;

[0029] Figure 4 This is a front view of the short lifting device structure provided in an embodiment of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the plate hook provided in an embodiment of this utility model;

[0031] Figure 6 This is a front view of the lifting support device in its working state according to an embodiment of this utility model;

[0032] Figure 7 This is a side view of the working state of the lifting support device according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram showing the connection between the long lifting device structure and the short lifting device structure at the lifting device support point, according to an embodiment of this utility model.

[0034] Figure 9 This is a schematic diagram of the long lifting device structure and the connection between the fan-shaped segment and the lifting and lowering position according to an embodiment of this utility model;

[0035] Figure 10 This is a schematic diagram of the combined extension of the long lifting device structure and the short lifting device structure provided in the embodiment of this utility model for continued installation and positioning;

[0036] Figure 11 This is a schematic diagram of the sector segment being installed in place according to an embodiment of this utility model;

[0037] Figure 12This is a schematic diagram of the combination and extension of the long lifting device structure and the short lifting device structure, and the connection with the fan-shaped segment for lifting and upward movement according to an embodiment of this utility model;

[0038] Figure 13 This is a schematic diagram of the combined lifting device separation, long lifting device structure and fan-shaped section lifting upward provided by the embodiment of this utility model;

[0039] Figure 14 This is a schematic diagram illustrating the completion of lifting and replacing the sector segment according to an embodiment of this utility model;

[0040] In the diagram: 1. Sector segment; 2. Sector segment guide rail replacement; 3. Long lifting device structure; 4. Short lifting device structure; 5. Lifting device support device; 5-1. Support; 5-2. Pin shaft; 5-3. Guide wheel support frame; 6. External sector segment lifting plate connecting pin; 7. Crane hook; 8. First lifting point; 9. First connecting assembly; 9-1. Plate hook; 9-2. Hook point; 10. Arc-shaped support groove; 11. Support shaft; 12. Lifting device lifting beam; 13. Chain plate and chain shaft structure; 13-1. Chain shaft; 13-2. Chain plate; 13-3. Guide wheel; A. Highest point of the crane hook's range of motion; B. Lowest point of the crane hook's range of motion. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-14 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0042] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Reference Figures 1-14 As shown, the combined slab continuous casting machine sector section replacement lifting device provided by this utility model is applied to the replacement of sector sections in a straight-arc continuous casting machine. The straight-arc continuous casting machine includes a sector section 1 and a sector section replacement guide rail 2. In the figure, A is the highest point of the crane hook's range of motion, and B is the lowest point of the crane hook's range of motion.

[0045] Example 1

[0046] The system includes a long lifting device 3, a short lifting device 4, and a lifting device support 5. Several guide wheels 13-3, matching the changing guide rail of the sector segment, are provided within both the long and short lifting devices. A first lifting point 8, matching the external crane hook 7, is provided at the top of both the long and short lifting devices, allowing the top of either the long or short lifting device to be connected to the crane hook as needed. A matching first connecting component 9 is provided between the bottom of the short lifting device and the top of the long lifting device, allowing the short lifting device to be connected between the top of the long lifting device and the crane hook as needed. The bottom of the long lifting device is connected to the external sector segment. The lifting device support is mounted on a bracket on the side of the changing guide rail of the sector segment, and has two states: supported on the changing guide rail and detached from it. When the lifting device support is supported on the changing guide rail, the top of the long lifting device is supported on the lifting device support.

[0047] The existing continuous casting workshop suffered from limited space, low overhead crane limits, and excessively long, bent guide rails in the newly designed sector segment replacement system, failing to meet the requirements for hoisting and replacing the new slab sector segments after the upgrade. This embodiment addresses this by using a long lifting device, a short lifting device, and a lifting device support to facilitate the installation or replacement of sector segments with excessively long, bent guide rails. First, the sector segment is lowered along the sector segment replacement guide rail to its maximum length using the long lifting device. Second, the lifting device is switched to support the sector segment replacement guide rail, and the long lifting device is temporarily supported on the lifting device. Then, the connection between the overhead crane hook and the long lifting device is disconnected, and the short lifting device is connected between the long lifting device and the overhead crane hook, forming a combined lifting device structure. Finally, the combined lifting device is used to lower the sector segment along the sector segment replacement guide rail to the designated position for installation. The reverse process is for disassembling the sector segment.

[0048] Example 2

[0049] The structure and principle of Embodiment 2 are similar to those of Embodiment 1, except that: a preferred implementation of the lifting device is provided, wherein a single sector segment is provided with two sector segment replacement guide rails; a lifting device is provided on the outer support of each of the two sector segment replacement guide rails, and an arc-shaped support groove 10 is provided on the lifting device. Support shafts are provided on both sides of the top of the long lifting structure, and guide wheels are provided at the outer ends 11 of the support shafts; when the lifting device is supported on the sector segment replacement guide rails, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rails.

[0050] In Embodiment 1, based on the above-mentioned implementation of the lifting device, a preferred specific structure of the lifting device is given; the lifting device includes a support 5-1, a pin 5-2, and a guide wheel support frame 5-3. The support is fixed on an external bracket on the outside of the sector-shaped section replacement guide rail. The guide wheel support frame includes a support part and a handle part, which are fixedly connected, and an arc-shaped support groove is provided on the support part; the guide wheel support frame is rotatably connected to the support through the pin, and the handle part controls the support part to be supported on the sector-shaped section replacement guide rail and to detach from the sector-shaped section replacement guide rail.

[0051] Preferably, the guide wheel support frame adopts an L-shaped bracket, with the vertical section of the L-shaped bracket serving as the handle and the horizontal section of the L-shaped bracket serving as the support, and an arc-shaped support groove is provided at the end of the horizontal section; the connection between the vertical section and the horizontal section is rotatably connected to the support by a pin.

[0052] However, the structural form of the guide wheel support frame is not limited to the L-shaped bracket; other structural forms can also be adopted.

[0053] Example 3

[0054] The structure and principle of Example 3 are similar to those of Example 1 or 2, except that a preferred implementation of the long lifting device structure and the short lifting device structure is given.

[0055] Specifically, both the long and short lifting structures include a lifting beam 12 and a chain plate and chain shaft structure 13, with the first lifting point located on the lifting beam; the first connecting assembly is located between the lifting beam of the long lifting structure and the chain plate and chain shaft structure of the short lifting structure; and the external fan-shaped section lifting plate connecting pin 6 is connected to the bottom of the chain plate and chain shaft structure of the long lifting structure.

[0056] Based on Embodiment 3, a preferred structural form of the chain plate and chain shaft structure is provided. The chain plate and chain shaft structure includes several parallel chain shafts 13-1, chain plates 13-2 connected between adjacent chain shafts or connected to the bottom chain shaft, and guide wheels 13-3 rotatably connected to the ends of the chain shafts; one or two chain plates are connected to both ends of adjacent chain shafts and inside the guide wheels; the chain plate and chain shaft structure of the short lifting device structure has a chain shaft at the bottom, which is connected to the first connecting assembly; the chain plate and chain shaft structure of the long lifting device structure has a chain plate at the bottom, which is connected to the connecting pin of the outer fan-shaped section lifting plate; the spacing between the guide wheels on both sides of the chain shaft and the size of the guide wheels match the size and position of the replacement guide wheels of the fan-shaped section.

[0057] In embodiments 1-3, the first connecting component includes a plate hook 9-1 and a hook point 9-2 that matches the plate hook. The plate hook is located on the lowest chain shaft of the short lifting device structure, and the hook point is located on the lifting beam of the long lifting device structure.

[0058] Example 4

[0059] The structure and principle of Example 4 are similar to those of Examples 1-3, except that: preferably, a single sector segment is provided with two sector segment replacement guide rails; a lifting device is provided on the outer support of each of the two sector segment replacement guide rails, the lifting device is provided with an arc-shaped support groove, and support shafts are provided on both sides of the top of the long lifting structure, with guide wheels located at the outer ends of the support shafts; when the lifting device is supported on the sector segment replacement guide rail, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rail;

[0060] The hook point is located on the support shaft.

[0061] In embodiments 1-4, the chain plates in the chain plate and chain shaft structure adopt a structure in which single plates and double plates are arranged alternately, and the single plate is located between the double plates at the connection of the chain plates on the chain shaft; in the long lifting device structure, the last chain plate of the chain shaft and chain plate structure is a single plate; in the short lifting device, the last chain plate of the chain shaft and chain plate structure is a double plate, and the two plate hooks are respectively connected to the chain shaft at the bottom of the last chain plate, and the plate hooks are located between the double plates.

[0062] The working process of this utility model:

[0063] When installing sector segments, as follows Figure 10-12 As shown:

[0064] 1. First, connect the long lifting device to the sector section and lift the sector section into the sector section replacement guide rail; when the lifting beam of the long lifting device is about to be lifted into the sector section replacement guide rail, switch the lifting device support to support on the sector section replacement guide rail and temporarily support the long lifting device on the lifting device support.

[0065] 2. Switch the crane hook from being connected to the first lifting point of the long lifting device structure to being connected to the first lifting chain of the short lifting device, and connect the long lifting device structure to the bottom of the short lifting device structure through the first connecting component to achieve the purpose of combining and extending the long and short lifting devices. Switch the lifting device support device to the state of being detached from the sector section and replacing the guide rail. Install the sector section in place by using the crane hook in conjunction with the combined long and short lifting devices.

[0066] When replacing the lifting sector section, if Figure 13-14 As shown:

[0067] Similar to the installation of the sector segment, the process begins with combining and extending a long and short lifting device to hoist the sector segment. As the long lifting device is about to lift the sector segment out to replace the guide rail, the lifting support is switched to support the sector segment replacement guide rail. The long lifting device is then temporarily supported on the lifting support, the long and short lifting devices are separated, and the short lifting device is removed. Finally, the long lifting device is used to lift the sector segment out, completing the replacement and installation of the sector segment.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A combined slab continuous casting machine sector section replacement lifting device, used for replacing sector sections in straight-arc continuous casting machines. The straight-arc continuous casting machine includes sector sections and sector section replacement guide rails. Its features are: The system includes a long lifting device, a short lifting device, and a lifting device support device. Both the long and short lifting devices have several guide wheels that match the changing guide rails of the sector segment. Each of the long and short lifting devices has a first lifting point at its top that matches the hook of an external gantry crane. The top of either the long or short lifting device can be connected to the gantry crane hook as needed. A matching first connecting component is located between the bottom of the short lifting device and the top of the long lifting device, allowing the short lifting device to connect between the top of the long lifting device and the gantry crane hook as needed. The bottom of the long lifting device is connected to the external sector segment. The lifting device support device is mounted on a bracket on the side of the changing guide rail of the sector segment, and can be in two states: supported on the changing guide rail and detached from it. When the lifting device support device is supported on the changing guide rail, the top of the long lifting device is supported on the lifting device support device.

2. The combined slab continuous casting machine sector section replacement lifting device according to claim 1, characterized in that: Each sector segment has two sector segment replacement guide rails; each of the two sector segment replacement guide rails is provided with a lifting device on the outer support on the outer side. The lifting device is provided with an arc-shaped support groove. Support shafts are provided on both sides of the top of the long lifting structure, and guide wheels are provided at the outer ends of the support shafts. When the lifting device is supported on the sector segment replacement guide rail, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rail.

3. The combined slab continuous casting machine sector section replacement lifting device according to claim 2, characterized in that: The lifting device includes a support, a pin, and a guide wheel support frame. The support is fixed on an external bracket on the outside of the sector section replacement guide rail. The guide wheel support frame includes a support part and a handle part, which are fixedly connected, and an arc-shaped support groove is provided on the support part. The guide wheel support frame is rotatably connected to the support through the pin. The handle part controls the support part to be supported on the sector section replacement guide rail and to detach from the sector section replacement guide rail.

4. The combined slab continuous casting machine sector section replacement lifting device according to claim 3, characterized in that: The guide wheel support frame adopts an L-shaped bracket. The vertical section of the L-shaped bracket serves as the handle, and the horizontal section of the L-shaped bracket serves as the support. An arc-shaped support groove is provided at the end of the horizontal section. The connection between the vertical and horizontal sections is rotatably connected to the support by a pin.

5. The combined slab continuous casting machine sector section replacement lifting device according to claim 1, characterized in that: Both the long and short lifting device structures include a lifting beam and a chain plate and chain shaft structure. The first lifting point is located on the lifting beam. The first connecting assembly is located between the lifting beam of the long lifting device structure and the chain plate and chain shaft structure of the short lifting device structure. The connecting pin of the outer fan-shaped section lifting plate is connected to the bottom of the chain plate and chain shaft structure of the long lifting device structure.

6. The combined slab continuous casting machine sector section replacement lifting device according to claim 5, characterized in that: The chain plate and chain shaft structure includes several parallel chain shafts, chain plates connected between adjacent chain shafts or connected to the bottom chain shaft, and guide wheels rotatably connected to the ends of the chain shafts; one or two chain plates are connected to both ends of adjacent chain shafts and inside the guide wheels; the chain shaft is set at the bottom of the chain plate and chain shaft structure of the short lifting device structure, and the chain shaft is connected to the first connecting assembly; the chain plate and chain shaft structure of the long lifting device structure is set at the bottom, and the chain plate is connected to the connecting pin of the outer fan-shaped section lifting plate; the spacing between the guide wheels on both sides of the chain shaft and the size of the guide wheels match the size and position of the replacement guide wheels of the fan-shaped section.

7. The combined slab continuous casting machine sector section replacement lifting device according to claim 6, characterized in that: The first connecting assembly includes a plate hook and a hook point that matches the plate hook. The plate hook is located on the lowest chain shaft of the short lifting device structure, and the hook point is located on the lifting beam of the long lifting device structure.

8. The combined slab continuous casting machine sector section replacement lifting device according to claim 7, characterized in that: Each sector segment has two sector segment replacement guide rails; each of the two sector segment replacement guide rails is provided with a lifting device on the outer support of the outer side, the lifting device is provided with an arc-shaped support groove, and support shafts are provided on both sides of the top of the long lifting structure, with guide wheels located at the outer ends of the support shafts; when the lifting device is supported on the sector segment replacement guide rail, the guide wheels on the support shafts on both sides of the long lifting structure are placed in the arc-shaped support grooves on both sides of the guide rail; The hook point is located on the support shaft.

9. The combined slab continuous casting machine sector section replacement lifting device according to claim 8, characterized in that: In the chain plate and chain shaft structure, the chain plates adopt a structure of alternating single plates and double plates, and at the connection of the chain plates on the chain shaft, the single plate is located between the double plates; in the long lifting device structure, the last chain plate of the chain shaft and chain plate structure is a single plate; in the short lifting device, the last chain plate of the chain shaft and chain plate structure is a double plate, and the two plate hooks are respectively connected to the chain shaft at the bottom of the last chain plate, and the plate hooks are located between the double plates.

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