A heat preservation device and system for an intermediate roller table in a hot-rolled plate strip production line

Abstract

The utility model provides a kind of heat-rolled plate strip production line intermediate roll way heat preservation device and system, including support structure, heat preservation structure and side stop structure, support structure includes two support units, support unit has fixed end and cantilever end, heat preservation structure includes heat preservation cover, heat preservation layer and the hoisting part of protruding formation in heat preservation cover top, lap joint portion, the side of heat preservation cover is supported on the transmission side guard plate of intermediate roll way, and side stop structure is suspended connection in the other side of heat preservation cover, and the bottom end of side stop structure is free end.Such support structure using cantilever form utilizes existing intermediate roll way transmission side space, does not affect overall space occupancy and also facilitates installation heat preservation structure, can directly hoist heat preservation structure without affecting production, installation is quick, to play good heat preservation effect, and side stop structure can play the role of auxiliary heat preservation on side, and bottom end is free end and will not affect waste product to push out, functional comprehensive, applicable to heat-rolled plate production line heat preservation reform.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled plate insulation technology, and in particular to an insulation device and system for the intermediate roller table of a hot-rolled plate and strip production line. Background Technology

[0002] In domestic conventional hot-rolled plate production lines, the length of the intermediate conveyor roller table at the exit of the roughing mill is between 70 and 90 meters. Currently, the rolling lines produce a wide variety of steel types and specifications. When rolling thinner plates, the temperature difference between the head and tail is large, and the temperature difference between the head and tail of the intermediate billet entering the finishing mill exceeds 100℃, resulting in poor rolling stability. This is unfavorable for rolling thin specifications and certain steel grades, thus increasing the requirements for the temperature uniformity of the intermediate billet.

[0003] Some existing hot-rolled steel production lines, which were put into operation earlier, were designed and constructed without insulation structures on the intermediate roller conveyor to save investment. Only after commissioning were they discovered that insulation structures were necessary to ensure the uniformity of strip temperature and improve rolling stability. Adding insulation structures now faces several challenges: insufficient installation space, substantial capital investment, and a long construction period requiring significant production line downtime for equipment installation.

[0004] Therefore, it is necessary to propose a heat preservation device and system for the intermediate roller table of a hot-rolled strip production line to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a heat preservation device and system for the intermediate roller table of a hot-rolled strip production line, so as to solve the problem that the heat preservation structure in the prior art is not easy to install, resulting in a large temperature difference in the slab.

[0006] To achieve the above objectives, this utility model provides a heat preservation device for the intermediate roller conveyor of a hot-rolled strip production line, comprising a support structure, a heat preservation structure, and a side baffle structure; wherein,

[0007] The support structure includes two support units arranged longitudinally at intervals. Each support unit has a fixed end and a cantilever end. The fixed end is located on the drive side of the intermediate roller conveyor and is spaced apart from the intermediate roller conveyor. The cantilever end is located directly above the intermediate roller conveyor.

[0008] The insulation structure includes an insulation cover, an insulation layer, and a lifting part and an overlapping part protruding from the top of the insulation cover. The lifting part is used for connection with an external hook. The overlapping part is attached to the cantilever ends of the two support units. The insulation layer is connected to the bottom of the insulation cover and spaced apart from the intermediate roller conveyor. One side of the insulation cover abuts against the transmission side guard plate of the intermediate roller conveyor. The side baffle structure is suspended and connected to the other side of the insulation cover, and the bottom end of the side baffle structure is a free end.

[0009] Preferably, the overlapping part includes two sets of overlapping groups arranged laterally at intervals. Each set of overlapping groups includes two limiting buckles arranged longitudinally opposite each other. The two limiting buckles are respectively located between the two support units, and each limiting buckle is recessed towards the adjacent support unit to form an overlapping groove. The top of the limiting buckle overlaps on the cantilever end.

[0010] Preferably, the side baffle structure includes multiple suspension chains arranged in sequence along the longitudinal direction, and multiple hooks arranged in sequence along the longitudinal direction are protruding on the other side of the heat insulation cover. Each hook is provided with a corresponding suspension chain, wherein the top end of the suspension chain is hung on the hook, and the bottom end of the suspension chain is suspended and extends downward to the top surface of the intermediate roller conveyor.

[0011] Preferably, the insulation layer comprises a plurality of insulation modules arranged in a matrix and sequentially bonded together, and the insulation modules are filled with insulation material.

[0012] Preferably, the insulation material is insulation cotton.

[0013] Preferably, the distance between the insulation layer and the intermediate roller conveyor is 240mm to 260mm.

[0014] Preferably, the insulation module is in the shape of a block, and the dimensions of each insulation module are 300mm*300mm*160mm.

[0015] Preferably, each of the support units includes a fixed support and a cantilever frame. The bottom end of the fixed support is fixedly connected to the drive side bottom plate of the intermediate roller conveyor. One end of the cantilever frame is connected to the fixed support by bolts, and the other end of the cantilever frame is suspended above the intermediate roller conveyor.

[0016] Preferably, it further includes a positioning block, wherein a protrusion is formed on the top of the cantilever frame, the positioning block is connected to the end of the limiting buckle and located outside the protrusion, and a gap is reserved between the positioning block and the protrusion.

[0017] This application also provides a heat preservation system for intermediate roller conveyors in a hot-rolled strip production line, including an intermediate roller conveyor with a drive side. The bottom of the drive side of the intermediate roller conveyor is provided with a base plate, and the top of the drive side of the intermediate roller conveyor is provided with a protective plate. It also includes a plurality of heat preservation devices for intermediate roller conveyors in a hot-rolled strip production line as described above. The plurality of heat preservation devices for intermediate roller conveyors in a hot-rolled strip production line are arranged at intervals along the longitudinal direction. The fixed end of the support structure of each heat preservation device for intermediate roller conveyors in a hot-rolled strip production line is connected to the base plate of the drive side of the intermediate roller conveyor. The cantilever end of the support structure of each heat preservation device for intermediate roller conveyors in a hot-rolled strip production line is located directly above the intermediate roller conveyor. The heat preservation structure of the heat preservation device for intermediate roller conveyors in a hot-rolled strip production line is arranged at intervals from the intermediate roller conveyor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a heat preservation device and system for the intermediate roller conveyor of a hot-rolled strip production line, including a support structure, a heat preservation structure, and a side baffle structure. The support structure includes two support units arranged longitudinally at intervals. Each support unit has a fixed end and a cantilever end. The fixed end is located on the drive side of the intermediate roller conveyor and is spaced apart from the intermediate roller conveyor. The cantilever end is located directly above the intermediate roller conveyor. The heat preservation structure includes a heat preservation cover, a heat preservation layer, and a lifting part and an overlapping part protruding from the top of the heat preservation cover. The lifting part is used for connection with an external hook. The overlapping part is attached to the cantilever ends of the two support units. The heat preservation layer is connected to the bottom of the heat preservation cover and is spaced apart from the intermediate roller conveyor. One side of the heat preservation cover abuts against the drive side guard plate of the intermediate roller conveyor. The side baffle structure is suspended and connected to the other side of the heat preservation cover, and the bottom end of the side baffle structure is a free end. This cantilevered support structure utilizes the existing space on the side of the intermediate roller conveyor, without affecting the overall space occupation and facilitating the installation of the insulation structure. The insulation structure can be directly hoisted without affecting production, making installation quick and providing good insulation. The side baffle structure can also provide auxiliary insulation from the side, and the bottom is a free end, which will not affect the ejection of waste products. It is fully functional and suitable for the insulation transformation of hot-rolled plate production lines. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a side view of an application scenario of the heat preservation device in one embodiment of the present utility model.

[0022] Figure 2 This is a perspective view of an application scenario of the heat preservation device in one embodiment of the present utility model.

[0023] Figure 3 This is a perspective view of an application scenario of the thermal insulation system in one embodiment of the present invention.

[0024] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0025] Explanation of icon numbers:

[0026] 10. Support structure; 110. Support unit; 111. Fixed support; 112. Cantilever frame; 113. Protrusion; 20. Insulation structure; 210. Insulation cover; 220. Insulation layer; 221. Hook; 230. Lifting part; 240. Limit buckle; 241. Overlap groove; 242. Positioning block; 30. Side guard structure; 310. Suspension chain; 40. Intermediate roller conveyor; 410. Guard plate. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Please see the appendix Figure 1-3 This utility model provides an embodiment of a heat preservation device for an intermediate roller conveyor 40 in a hot-rolled strip production line, comprising a support structure 10, a heat preservation structure 20, and a side baffle structure 30. First, it should be noted that in this application, "longitudinal" refers to the conveying direction along the intermediate roller conveyor 40, while "transverse" refers to the axial direction of the rollers along the intermediate roller conveyor 40. The specific design is as follows:

[0032] The support structure 10 includes two support units 110 arranged longitudinally at intervals. Each support unit 110 has a fixed end and a cantilever end. The fixed end is located on the drive side of the intermediate roller conveyor 40 and is spaced apart from the intermediate roller conveyor 40. The cantilever end is located directly above the intermediate roller conveyor 40. The insulation structure 20 includes an insulation cover 210, an insulation layer 220, and a lifting part 230 and an overlapping part protruding from the top of the insulation cover 210. The lifting part 230 is used for connection to an external hook. The overlapping part is attached to the cantilever ends of the two support units 110. The insulation layer 220 is connected to the bottom of the insulation cover 210 and is spaced apart from the intermediate roller conveyor 40. One side of the insulation cover 210 abuts against the drive side guard plate 410 of the intermediate roller conveyor 40. The side baffle structure 30 is suspended and connected to the other side of the insulation cover 210, and the bottom end of the side baffle structure 30 is a free end.

[0033] Specifically, the insulation device for the intermediate roller conveyor 40 of the hot-rolled strip production line in this application includes a support structure 10, an insulation structure 20, and a side baffle structure 30. The support structure 10 is used for the installation and connection of the insulation structure 20. It adopts a cantilever structure to support the insulation structure 20 to a suitable covering position to achieve the function of insulation. Specifically, it includes two support units 110 arranged longitudinally at intervals, so that the insulation structure 20 can be erected on the two support units 110; in detail, Each of the support units 110 has a fixed end and a cantilever end. The fixed end is used for support and fixation and is located on the drive side of the intermediate roller conveyor 40. This allows the space on the drive side of the intermediate roller conveyor 40 to be utilized and can be directly connected to the drive side base plate (not shown in the figure) of the intermediate roller conveyor 40 for fixation, thereby improving the overall integrity. The cantilever end is suspended directly above the intermediate roller conveyor 40 to facilitate the hoisting and connection of the insulation structure 20, thereby covering the intermediate roller conveyor 40.

[0034] The insulation structure 20 includes an insulation cover 210, an insulation layer 220, and a lifting part 230 and an overlapping part protruding from the top of the insulation cover 210. The lifting part 230 is used for connection with an external hook, such as a crane, to hook the lifting part 230 for hoisting the entire structure. The overlapping part is used to overlap the cantilever ends of the two support units 110, allowing for quick installation without affecting the normal operation of the production line. The insulation cover 210 achieves its insulation effect through the insulation layer 220. During installation, one side of the insulation cover 210 is directly placed against the existing guard plate 410 on the drive side of the intermediate roller conveyor 40. The insulation cover 210 provides some support and, in conjunction with the protective plate 410, provides insulation on this side. The side baffle structure 30 is installed on the other side of the insulation cover 210. Thus, the insulation layer 220, the transmission side protective plate 410 of the intermediate roller conveyor 40, and the side baffle structure 30 together form an insulation space covering the intermediate roller conveyor 40, thereby achieving a better insulation effect. It is worth mentioning that the bottom end of the side baffle structure 30 is a free end. Thus, when the side baffle structure 30 plays an auxiliary role in insulation, the scrap steel on the production line can be freely pulled out through the bottom end of the side baffle structure 30 without having to lift the entire insulation structure 20, so as not to affect the scrap steel discharge.

[0035] In a preferred embodiment of the present invention, the overlapping part includes two sets of overlapping groups arranged laterally at intervals. Each set of overlapping groups includes two limiting buckles 240 arranged longitudinally opposite each other. The two limiting buckles 240 are respectively located between the two supporting units 110, and each limiting buckle 240 is recessed towards the adjacent supporting unit 110 to form an overlapping groove 241. The top of the limiting buckle 240 is attached to the cantilever end.

[0036] It should be noted that forming four matrix-distributed limiting buckles 240 provides good installation stability. In each overlapping group, two limiting buckles 240 are respectively located inside two support units 110, that is, between two support units 110, and are respectively overlapped on the cantilever ends of adjacent support units 110, so that the cantilever ends of support units 110 are located in the overlapping grooves 241 of each limiting buckle 240. It is worth mentioning that the overlapping grooves 241 can be bent to create a certain gap between the root of the limiting buckle 240 and the cantilever end of the support unit 110, which facilitates subsequent disassembly and is also convenient for installation.

[0037] In a preferred embodiment of the present invention, the side baffle structure 30 includes a plurality of suspension chains 310 arranged longitudinally in sequence. On the other side of the heat insulation cover 210, a plurality of hooks 221 are protruding and arranged longitudinally in sequence. Each hook 221 is correspondingly provided with a suspension chain 310. The top end of the suspension chain 310 is hung on the hook 221, and the bottom end of the suspension chain 310 is suspended and extends downward to the top surface of the intermediate roller conveyor 40.

[0038] It should be noted that since the side baffle structure 30 only serves as an auxiliary heat preservation function, the main heat preservation effect is based on the top insulation layer 220 to prevent excessive heat loss. Therefore, the side baffle structure 30 can adopt the structure of a suspension chain 310. The top of the suspension chain 310 can be directly hung on the corresponding hook 221, which is convenient for installation, while the bottom end is a free end. When the scrap is pushed out of the intermediate roller conveyor 40, the suspension chain 310 can be directly pushed without being obstructed. At the same time, the suspension chain 310 has small holes, which allows technicians to observe the internal situation in real time and make corresponding process responses (such as slab condition, scrap steel discharge, etc.).

[0039] In a preferred embodiment of the present invention, the insulation layer 220 includes a plurality of insulation modules arranged in a matrix and sequentially bonded together, and the insulation modules are filled with insulation material.

[0040] It is worth noting that multiple insulation modules are used to form a whole square insulation layer 220. This results in a relatively airtight insulation layer with good insulation performance. Preferably, the insulation material filled in each insulation module can be insulation cotton. Insulation cotton is lightweight and suitable for hanging structures. The insulation cotton contains a large number of fine fibers, which form countless tiny pores. Air has a very low thermal conductivity, and the air in these tiny pores is difficult to move, making it difficult for heat to be transferred by conduction. This effectively prevents heat transfer and achieves the insulation effect.

[0041] Furthermore, the distance between the insulation layer 220 and the intermediate roller conveyor 40 is 240mm to 260mm.

[0042] It should be noted that the distance between the insulation layer 220 and the intermediate roller conveyor 40 must be sufficient to ensure the normal conveying of materials, but it should not be too high to affect the insulation effect. Preferably, the distance between the insulation layer 220 and the intermediate roller conveyor 40 is 240mm to 260mm. In this preferred embodiment, it can be set to 250mm. Those skilled in the art can choose according to actual needs.

[0043] Furthermore, the insulation module is block-shaped, and each insulation module has a size of 300mm*300mm*160mm.

[0044] It should be understood that the size of the insulation module can be prefabricated according to a suitable processing and installation method. In a preferred embodiment of this application, the size of each insulation module is 300mm*300mm*160mm (length×width×height). When a complete insulation module cannot be placed at the end, the width can be appropriately reduced, for example, 300mm*200mm*160mm can be used. Those skilled in the art can determine the specific dimensions as needed.

[0045] Furthermore, each of the support units 110 includes a fixed support 111 and a cantilever 112. The bottom end of the fixed support 111 is fixedly connected to the transmission side base plate of the intermediate roller conveyor 40. One end of the cantilever 112 is connected to the fixed support 111 by bolts, and the other end of the cantilever 112 is cantilevered and positioned directly above the intermediate roller conveyor 40.

[0046] It should be noted that the assembly of the fixed support 111 and the cantilever 112 facilitates installation. First, the fixed support 111 is installed and connected to the transmission side bottom plate of the intermediate roller conveyor 40. Then, the cantilever 112 is hoisted onto the fixed support 111 and secured with bolts. This makes it easy to disassemble the cantilever 112 later and replace it with a cantilever 112 of different heights as needed.

[0047] Furthermore, it also includes a positioning block 242. The top of the cantilever 112 is provided with an upward protrusion forming a protrusion 113. The positioning block 242 is connected to the end of the limiting buckle 240 and is located outside the protrusion 113. A gap is reserved between the positioning block 242 and the protrusion 113.

[0048] It should be noted that the positioning block 242 is used to cooperate with the protrusion 113 of the cantilever 112. Considering that the entire device is in an overlapping form, it will not move due to its own weight. However, if it is subjected to an unexpected external force, it can achieve a limiting effect under the resistance between the positioning block 242 and the protrusion 113 to prevent the entire device from falling. It is understood that a gap is reserved between the positioning block 242 and the protrusion 113 during the initial installation to facilitate installation. It only plays a limiting role in case of an accident.

[0049] This application also provides a heat preservation system for an intermediate roller conveyor 40 in a hot-rolled strip production line, including an intermediate roller conveyor 40, the intermediate roller conveyor 40 having a drive side, and a base plate provided at the bottom of the drive side of the intermediate roller conveyor 40, and a protective plate 410 provided at the top of the drive side of the intermediate roller conveyor 40. It also includes a plurality of heat preservation devices for the intermediate roller conveyor 40 as described above, the plurality of heat preservation devices being arranged longitudinally at intervals, the fixed end of the support structure 10 of each heat preservation device being connected to the base plate of the drive side of the intermediate roller conveyor 40, the cantilever end of the support structure 10 of each heat preservation device being positioned directly above the intermediate roller conveyor 40, and the heat preservation structure 20 of each heat preservation device being spaced apart from the intermediate roller conveyor 40.

[0050] It is understandable that the base plate of the intermediate roller conveyor 40 is typically used for mounting and fixing various transmission devices (such as motors), while the guard plate 410 is used to prevent the hot-rolled plates from colliding and damaging the transmission devices on the transmission side due to high temperature and movement. It also guides the movement of the hot-rolled plates to prevent them from falling. Therefore, both are conventional structures of the intermediate roller conveyor 40 and are well-known to those skilled in the art, and will not be described in detail here. However, the intermediate roller conveyor 40 between the roughing mill exit and the flying shear in conventional domestic hot strip rolling mills is quite long (the longest exceeding 80m). Therefore, multiple intermediate roller conveyors can be installed in the hot strip rolling mills of this application. The intermediate roller conveyor 40 is equipped with a heat preservation device to accommodate its length. Notably, the heat preservation devices for the intermediate roller conveyors 40 of multiple hot-rolled strip production lines need to be spaced apart to allow space for the scrap pusher (for ejecting scrap steel) and the pyrometer detection space. Thus, during installation, the system is fixed using the base plate on the drive side of the intermediate roller conveyor 40, and the cantilever structure facilitates the hoisting of the heat preservation structure 20. Simultaneously, the protective plate 410 on the drive side of the intermediate roller conveyor 40 and the side baffle structure 30 achieve a good heat preservation effect. The entire process does not require stopping the normal production of the line, has strong heat preservation properties, and does not affect scrap ejection, demonstrating promising application prospects.

[0051] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heat preservation device for an intermediate roller table in a hot strip mill line, characterized by, This includes the supporting structure, insulation structure, and side barrier structure; among which, The support structure includes two support units arranged longitudinally at intervals. Each support unit has a fixed end and a cantilever end. The fixed end is located on the drive side of the intermediate roller conveyor and is spaced apart from the intermediate roller conveyor. The cantilever end is located directly above the intermediate roller conveyor. The insulation structure includes an insulation cover, an insulation layer, and a lifting part and an overlapping part protruding from the top of the insulation cover. The lifting part is used for connection with an external hook. The overlapping part is attached to the cantilever ends of the two support units. The insulation layer is connected to the bottom of the insulation cover and spaced apart from the intermediate roller conveyor. One side of the insulation cover abuts against the transmission side guard plate of the intermediate roller conveyor. The side baffle structure is suspended and connected to the other side of the insulation cover, and the bottom end of the side baffle structure is a free end.

2. The heat preservation device for an intermediate roller table in a hot strip mill line according to claim 1, characterized in that, The overlapping part includes two sets of overlapping groups arranged laterally. Each set of overlapping groups includes two limiting buckles arranged longitudinally opposite each other. The two limiting buckles are respectively located between the two support units, and each limiting buckle is recessed towards the adjacent support unit to form an overlapping groove. The top of the limiting buckle is attached to the cantilever end.

3. The heat preservation device for an intermediate roller table in a hot strip mill line according to claim 1, characterized in that, The side baffle structure includes multiple suspension chains arranged in sequence along the longitudinal direction. On the other side of the heat insulation cover, multiple hooks are protruding and arranged in sequence along the longitudinal direction. Each hook is provided with a corresponding suspension chain. The top end of the suspension chain is hung on the hook, and the bottom end of the suspension chain is suspended and extends downward to the top surface of the intermediate roller conveyor.

4. The heat preservation device for an intermediate roll table in a hot strip mill line according to claim 1, characterized by The insulation layer comprises multiple insulation modules arranged in a matrix and sequentially bonded together, and each insulation module is filled with insulation material.

5. The heat preservation device for an intermediate roller table in a hot strip mill line according to claim 4, characterized in that, The insulation material is insulation cotton.

6. The heat preservation device for the intermediate roller table of a hot-rolled strip production line according to claim 5, characterized in that, The distance between the insulation layer and the intermediate roller conveyor is 240mm to 260mm.

7. The heat preservation device for an intermediate roller table in a hot strip mill line according to claim 6, characterized in that, The insulation module is block-shaped, and each insulation module measures 300mm*300mm*160mm.

8. The heat preservation device for the intermediate roller table of the hot strip mill line according to claim 2, characterized in that, Each of the support units includes a fixed support and a cantilever frame. The bottom end of the fixed support is fixedly connected to the drive side base plate of the intermediate roller conveyor. One end of the cantilever frame is connected to the fixed support by bolts, and the other end of the cantilever frame is suspended above the intermediate roller conveyor.

9. The heat preservation device for an intermediate roller table in a hot strip production line according to claim 8, characterized in that, It also includes a positioning block, on the top of the cantilever frame, a protrusion is formed by the upward protrusion, the positioning block is connected to the end of the limiting buckle and located outside the protrusion, and a gap is reserved between the positioning block and the protrusion.

10. A heat preservation system for an intermediate roller conveyor in a hot-rolled strip production line, comprising an intermediate roller conveyor having a drive side, wherein a bottom plate is provided at the bottom of the drive side of the intermediate roller conveyor, and a protective plate is provided at the top of the drive side of the intermediate roller conveyor, characterized in that, It also includes a plurality of intermediate roller conveyor insulation devices for hot-rolled strip production lines as described in any one of claims 1-9. The plurality of intermediate roller conveyor insulation devices for hot-rolled strip production lines are arranged at intervals along the longitudinal direction. The fixed end of the support structure of each intermediate roller conveyor insulation device is connected to the transmission side bottom plate of the intermediate roller conveyor. The cantilever end of the support structure of each intermediate roller conveyor insulation device is located directly above the intermediate roller conveyor. The insulation structure of the intermediate roller conveyor insulation device is arranged at intervals from the intermediate roller conveyor.

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