Thermal insulation device

Abstract

The invention relates to a thermal insulation device (1) for thermal insulation and / or screening of hot rolling stock in a rolling mill, comprising at least one thermal insulation hood (3), which is positionable over the rolling stock for reducing temperature losses, at least one carrier element (5), which receives at least one thermal insulation element (6) and / or a thermal insulation structure, wherein at least one holding frame (4) is provided for receiving the at least one carrier element (5), wherein the holding frame (4) is detachably fastened to the thermal insulation hood (3).

Description

[0001] Thermal insulation

[0002] The invention relates to a thermal insulation device for thermal insulation and / or shielding of a hot rolled material in a rolling mill, comprising at least one thermal insulation hood which can be positioned over the rolled material to reduce temperature losses.

[0003] Thermal insulation devices of this type are known in the prior art. In practice, thermal insulation hoods are used to reduce temperature losses in hot-rolled strip or slabs. Such thermal insulation devices comprise thermal insulation hoods that are positioned, for example, between a roughing mill and a finishing mill of a hot rolling mill, above the roller conveyor for the hot-rolled strip. The thermal insulation hoods typically include a core made of heat-insulating material, such as ceramic fibers, and a thin outer wall on the hot side, which forms a metal membrane made of a heat-resistant material. The metal membrane can, for example, be designed as a radiation-reflecting sheet. The durability of such membrane sheets in the thermal insulation hood is limited. This is due, among other things, to the high temperature stresses acting on the membrane sheets.Therefore, it is necessary to replace the thermal insulation elements and / or the membrane sheets from time to time.

[0004] Typically, thermal insulation hoods are suspended from pivoting structures designed so that the hood can be swung out of the production line as needed. Since the hood usually obstructs the view of the rolling operation and the maintenance of the rolling mill during any necessary troubleshooting, WO201 8 / 050574 A1 describes a thermal insulation device for use in a rolling mill, comprising at least one thermal insulation carriage with a thermal insulation hood. The carriage can be moved horizontally, along a straight line, out of and into the processing line or rolling line by means of a drive mechanism.

[0005] WO 2017 / 009074 A1 describes a thermal insulation device for insulating a metallic product in a rolling mill. The device comprises a support element to which a number of thermal insulation elements are arranged. The thermal insulation elements are formed by several side parts that enclose a receiving space for a thermal insulation material. At least two of the side parts are connected to each other at their abutting side regions by a hinge-like connection. The thermal insulation device is designed, in particular, such that the thermal insulation elements can be used interchangeably with respect to their upper surfaces; that is, the respective surface sides can optionally function as the hot side, thus increasing the overall service life of the sheets.

[0006] To replace the support elements, the thermal insulation hood is normally held in a raised, central position, and each support element is replaced individually above the rolling mill. This has the disadvantage that replacing each support element is relatively time-consuming. The rolling mill must be stopped for an extended period. Furthermore, this procedure poses a safety risk, as maintenance personnel must position themselves beneath the raised thermal insulation hood. Despite the fact that the thermal insulation hood is in a raised position above the rolling mill, the available space for replacing the individual support elements is limited, resulting in a relatively unergonomic position for personnel during the replacement process.

[0007] The invention is based on the objective of providing a thermal insulation device that has at least one easily and ergonomically replaceable thermal insulation element and / or a simple and ergonomically replaceable thermal insulation structure.

[0008] The problem is solved by providing a thermal insulation device with the features of claim 1 and claim 11. Advantageous variants of the thermal insulation device according to the invention are covered by the dependent claims.

[0009] One aspect of the invention relates to a thermal insulation device for thermal insulation and / or shielding of a hot rolled material in a rolling mill, comprising at least one thermal insulation hood which can be positioned over the rolled material to reduce temperature losses, and at least one support element which accommodates at least one thermal insulation element and / or a thermal insulation structure, wherein the thermal insulation device according to the invention is characterized in that at least one retaining frame is provided for receiving the at least one support element, wherein the retaining frame is detachably attached to the thermal insulation hood.

[0010] The arrangement of at least one support element on a separate mounting frame has the advantage that the mounting frame can be attached to the thermal insulation hood with at least one support element, but preferably with a plurality of support elements, or can also be removed from it.

[0011] Preferably, at least two support elements are attached to a common mounting frame and can be mounted simultaneously and together with the mounting frame on the thermal insulation hood. The mounting frame can, for example, be attached to a lifting device, so that the simultaneous assembly and disassembly of several support elements is possible with maximum ergonomics and while maintaining occupational safety. Preferably, the thermal insulation elements are designed as described in WO 2017 / 009074 A1 of the applicant. As explained in this publication, to which reference is made here for the purpose of disclosing the characteristics of the thermal insulation elements, it can be provided that a plurality, i.e.,at least two thermal insulation elements are arranged, such that at least one thermal insulation element is formed by several side parts which enclose a receiving space for a thermal insulation material, wherein at least two of the side parts are connected to each other at their abutting side areas by a hinge-like connection.

[0012] The thermal insulation elements can, for example, be designed as cassette-shaped elements that have at least one membrane sheet on the side facing the strip or slab, which is underlaid with or surrounds a core of heat-insulating ceramic fibers.

[0013] In a preferred embodiment of the thermal insulation device according to the invention, the mounting frame may comprise several profile supports that form a substantially polygonal, and preferably rectangular or square, mounting structure. The profile supports may be designed as U-profiles, I-profiles, T-profiles, C-profiles, L-profiles, or hollow profiles of any desired shape.

[0014] According to the invention, for example, at least one retaining frame can be attached to a supporting structure of the thermal insulation hood in such a way that it can be installed and removed parallel to a shielding plane or effective plane of the thermal insulation hood. The term effective plane refers to the plane that depends on a possible positioning position of the thermal insulation hood. In a suitable and advantageous embodiment of the thermal insulation device according to the invention, at least one retaining frame can be installed and removed parallel to or at an angle to a support plane for the rolled material from the rolling line. According to the invention, the supporting structure is provided by a corresponding design of the thermal insulation hood.

[0015] The supporting structure is particularly preferably designed as a swivel frame for the thermal insulation hood.

[0016] In a suitable variant of the thermal insulation device, the retaining frame and the supporting structure interacting with it can be designed such that at least one retaining frame can be inserted and removed from the rolling line parallel to a support plane for the rolled material, so that pivoting of the thermal insulation hood is not absolutely necessary.

[0017] In a particularly simple embodiment of the thermal insulation device according to the invention, the supporting structure can be provided with at least one window for the passage of fastening elements of a support frame and / or fastening elements of a lifting device for at least one support frame. In this way, at least one support frame can be positioned, for example, by means of an overhead crane, which can be arranged above the thermal insulation device, for example, on a crane track.

[0018] In a particularly preferred and advantageous embodiment of the invention, the thermal insulation hood accommodates a plurality of mounting frames arranged in rows and / or columns. The terms "rows" and "columns" refer to a rectangular configuration of a support structure for a thermal insulation hood that accommodates a plurality of mounting frames arranged in rows and columns, each mounting frame being composed of several profile supports, each of which may comprise several support elements with thermal insulation elements attached thereto.

[0019] The support frames can be arranged in such a way that either a row or a column of support elements can be simultaneously and jointly removed from or installed into the support structure of the thermal insulation hood on a common support frame.

[0020] At least one support frame can be designed to accommodate a multitude of support elements, forming a whole row or entire columns, each extending across the entire width or length of the pivot frame or support structure. However, each support frame can also be designed to extend only across a portion of the width or length of the support structure or pivot frame. The width of the support structure or pivot frame refers to its extent in the installed position, perpendicular to the conveying direction of the rolled material in the rolling mill, whereas the length of the support structure or pivot frame refers to its dimension in the conveying direction of the rolled material or the rolling mill.

[0021] In one embodiment of the thermal insulation device according to the invention, at least one retaining frame and / or at least the thermal insulation hood may have guide profiles that interact with complementary rail profiles of at least one retaining frame and / or the thermal insulation hood such that the retaining frame can be removed from and reinserted into the thermal insulation hood, preferably by a linear movement. In this embodiment of the thermal insulation device according to the invention, at least one retaining frame may be designed to be extendable or retractable from the support structure of the thermal insulation hood, similar to a drawer. In the simplest case, the complementary rail profiles may interact by friction. Alternatively, according to the invention, at least one guide may be achieved by means of guide rollers.

[0022] In a simple and preferred embodiment of the thermal insulation device according to the invention, means for clamping at least one retaining frame to the supporting structure of the thermal insulation hood are provided, preferably designed such that the retaining frame is supported and fastened against the direction of the weight force. The retaining frame can, for example, be provided on one side with at least one preferably tongue-shaped positioning aid that engages in a corresponding receptacle in the supporting structure.

[0023] On at least one other side of the support frame, it can be supported by means of at least one tie rod, which may, for example, be pivotally attached to the supporting structure.

[0024] Another aspect of the invention relates to a method for replacing at least one thermal insulation element of a thermal insulation device, wherein the method is characterized in that the at least one thermal insulation element is replaced together with an associated holding frame.

[0025] In a preferred embodiment, it is provided that a large number of thermal insulation elements are replaced on a common mounting frame.

[0026] The invention is explained below with reference to an embodiment shown in the drawings.

[0027] Figure 1 shows a schematic representation of a thermal insulation device as seen in

[0028] Conveyor direction of the rolled material to be thermally shielded, which greatly simplifies the removal of a plurality of support elements,

[0029] Figure 2 shows a bottom view of a thermal insulation hood.

[0030] Thermal insulation device according to the invention with a plurality of support elements arranged on several mounting frames and thermal insulation elements attached to these,

[0031] Figure 3 shows a view corresponding to Figure 2, illustrating a column-by-column construction of several support elements in a holding frame.

[0032] Figure 4 shows a view corresponding to Figure 2, illustrating the row-by-row construction of several support elements attached to a common support frame.

[0033] Figure 5 shows a second embodiment of the thermal insulation device according to the invention during the removal of a mounting frame.

[0034] Figure 6 shows a schematic representation corresponding to Figure 5 with a built-in mounting frame,

[0035] Figures 7A and 7B are schematic views illustrating the removal of a mounting frame with the support elements arranged on it when a thermal insulation hood is swung open.

[0036] Figure 8 shows an embodiment of the

[0037] Thermal insulation device according to Figure 8 above a roller conveyor of a rolling mill from a perspective transverse to the conveying direction of the rolled material,

[0038] Figure 1 shows a simplified representation of a thermal insulation device 1, which extends above a roller conveyor 2 of a rolling mill, for example a hot rolling mill, in the area between a roughing mill and a finishing mill. The thermal insulation device 1 according to the invention comprises a pivotable thermal insulation hood 3, a retaining frame 4 detachably attached to the supporting structure of the thermal insulation hood 3, and a plurality of support elements 5 attached to the retaining frame 4, each with thermal insulation elements 6 attached to it. The thermal insulation elements 6 each comprise cassettes filled with a mineral insulating material and, on the side facing the roller conveyor 2, which forms the warm side, each comprising heat-reflecting membrane sheets.

[0039] The support frame 4, for example, is assembled as a rectangular frame from steel profiles and can be moved under the thermal insulation hood 3 using lifting devices or the like and attached to it in such a way that the thermal insulation elements 6 extend completely over the width of the roller conveyor 2 and thus also above the hot rolled material transported on the roller conveyor 2.

[0040] The purpose of the thermal insulation device 1 is to prevent heat losses of the rolled material, for example between a roughing mill and a finishing mill, by providing thermal shielding of the rolled material upwards, i.e. in the direction of the thermal insulation hood 3.

[0041] As can be seen in particular from Figures 7A and 7B, in which identical components are designated with the same reference numerals, the thermal insulation hood 3 in one embodiment comprises a pivoting frame 7 designed as a support structure, which can be pivoted by means of a piston-cylinder arrangement 8 from a lowered operating position, in which it is located above the roller conveyor 2, to a raised maintenance position. In the operating position, which is shown on the right side of the illustration in Figure 7A, the pivoting frame 7 extends above the roller conveyor 2 such that the thermal insulation elements 6 extend approximately parallel to the rolled material (not shown) located on the roller conveyor 2. The plane of extension of the thermal insulation elements 6 defines the so-called effective plane of the thermal insulation hood 3. In principle, the pivoting frame 7 can be pivoted by an angle of up to 180 degrees, unlike the 90° angle shown in Figure 7.

[0042] Figure 2 shows a bottom view of the thermal insulation hood 3, i.e., a view of the so-called warm side of the thermal insulation hood 3. A plurality of thermal insulation elements 6 are each attached to a support element 5, and several support elements 5 are attached to a mounting frame 4. In the variant of the thermal insulation device 1 according to the invention shown in Figure 2, a single mounting frame 4 is provided as a rectangle made of steel profiles, on which a plurality of support elements 5 are arranged in columns 9 and rows 10. The columns 9 extend in the Y direction with reference to the coordinate system shown in Figure 2, whereas the rows extend in the X direction with reference to the coordinate system shown in Figure 2.

[0043] The variant of the thermal insulation device 1 shown in Figure 3 differs from that shown in Figure 2 in that a plurality of retaining frames 4 are provided, each detachably attached in a column-wise fashion to the thermal insulation hood 3 or to the pivot frame 7 of the thermal insulation hood 3. The arrow 11 shown in Figure 3 indicates the conveying direction of the rolled material below the thermal insulation device 1. Another variant of the thermal insulation device 1 according to the invention is shown in Figure 4. The perspective of the view in Figure 4 corresponds to the perspective in Figures 2 and 3. The embodiment shown in Figure 4 differs from the embodiment shown in Figure 3 in that a thermal insulation hood 3 is formed by a total of four retaining frames 4, which are arranged in a row and each of which accommodates seven support elements 5 that can be detached from the assembly of the pivot frame 7 in the X direction.

[0044] Figure 8 shows a view of the variant of the thermal insulation device 1 according to Figure 7 transverse to the conveying direction of the roller conveyor 2 with a variant of the thermal insulation device 1 according to the invention, in which the retaining frame 4 is formed by means of C-shaped steel profiles 12 which are supported with their belts on corresponding guide profiles 13 of the supporting structure of the pivot frame 7.

[0045] The steel profiles 12 of the retaining frame 4 and the guide profiles 13 of the swivel frame 7 form a sliding guide, which allows the retaining frame 4 to be removed in the manner of a drawer, provided that the fixing of the retaining frame 4 has been loosened beforehand.

[0046] Figures 5 and 6 schematically show a variant of the thermal insulation device 1 according to the invention, illustrating a horizontal expansion of the thermal insulation elements, with the view perpendicular to the plane of the drawing showing the conveying direction of the rolled material.

[0047] The support frame 4 is attached to or detached from the pivot frame 7 of the thermal insulation device 1 by means of an overhead crane (not shown) via a lifting device 15 (only partially shown). In the installation / removal situation shown in Figure 5, the lifting device 15 is attached to fastening elements of the support frame 4. The pivot frame 7 remains in a horizontal position while the support frame 4 is moved under the pivot frame 7 by means of the lifting device 15 and attached to it. The pivot frame 7 includes at least one opening 16, which may be penetrated by fastening elements of the support frame 4 in its installed position.

[0048] In the variant shown in Figure 5, additional lateral insulating elements 21 are arranged on the holding frame 4, which further insulate the strip edges of the rolled material. Alternatively, the insulating elements 21 can be attached to the pivoting frame 7 to fulfill the function of lateral insulation.

[0049] On the side of the retaining frame 4 facing the drive side of the roller conveyor 2, it is provided with a threading aid 17 which, in the installed position, engages in a complementary receptacle 18 on the pivot frame 7 (see Figure 6).

[0050] In the installed position, the swivel frame 7 is penetrated on the side facing away from the drive side of the roller conveyor 2 by a tie rod 19 which is pivotably arranged on the support frame 4 and which supports the support frame 4 with a tie rod 20.

[0051] Figures 7A and 7B illustrate the installation or removal of a retaining frame 4 of the thermal insulation device 1 according to the invention with the pivot frame 7 erected. The principle of anchoring or guiding the retaining frame 4 in the supporting structure of the pivot frame 7 can be implemented either in the form of a corresponding embodiment according to Figure 9 or the embodiment according to Figures 5 and 6. List of reference numerals

[0052] 1 Thermal insulation device

[0053] 2 Roller walkway

[0054] 3 Thermal insulation hood

[0055] 4 mounting frames

[0056] 5 support elements

[0057] 6 Thermal insulation element

[0058] 7 swivel frames

[0059] 8 piston-cylinder arrangement

[0060] 9 columns

[0061] 10 rows

[0062] 11 Arrow

[0063] 12 steel profiles

[0064] 13 Leadership profile

[0065] 14 not assigned

[0066] 15 lifting equipment

[0067] 16 windows

[0068] 17 Threading aid

[0069] 18 recording

[0070] 19 pull rod

[0071] 20 tie rods

[0072] 21 insulation elements

Claims

Patent claims 1. Thermal insulation device (1 ) for thermal insulation and / or shielding of a hot rolled material in a rolling mill, comprising at least one thermal insulation hood (3) which can be positioned over the rolled material to reduce temperature losses, and at least one support element (5) which accommodates at least one thermal insulation element (6) and / or a thermal insulation structure, characterized in that at least one support frame (4) is provided for receiving the at least one support element (5), wherein the support frame (4) is detachably attached to the thermal insulation hood (3).

2. Thermal insulation device (1) according to claim 1 , characterized in that at least two support elements (5) are attached to a common retaining frame (4) and can be mounted on the thermal insulation hood (3) simultaneously with the retaining frame (4).

3. Thermal insulation device (1 ) according to one of claims 1 or 2, characterized in that the holder frame (4) comprises profile supports which form a substantially polygonal, preferably rectangular or square, holding structure.

4. Thermal insulation device (1 ) according to one of claims 1 to 3, characterized in that at least one retaining frame (4) can be attached to a supporting structure of the thermal insulation hood (3) in such a way that it can be installed and removed parallel or at an angle between 0 and 180° to a shielding plane or effective plane of the thermal insulation hood (3).

5. Thermal insulation device (1) according to one of claims 1 to 4, characterized in that at least one retaining frame (4) is parallel or in at an angle to a support plane for the rolled material to be inserted into and removed from the rolling line.

6. Thermal insulation device (1 ) according to one of claims 1 to 5, characterized in that the supporting structure is designed as a pivot frame (7) of the thermal insulation hood (3).

7. Thermal insulation device (1 ) according to one of claims 1 to 6, characterized in that the supporting structure is provided with at least one opening, preferably in the form of a window (16) for the passage of fastening means for the retaining frame (4) and / or fastening means of the retaining frame.

8. Thermal insulation device (1 ) according to one of claims 1 to 7, characterized in that the thermal insulation hood (3) accommodates a plurality of retaining frames (4) which are arranged in rows and / or columns.

9. Thermal insulation device (1) according to one of claims 1 to 8, characterized in that at least one retaining frame (4) and / or at least the thermal insulation hood (3) has guide profiles (13) which interact with complementary rail profiles of at least one retaining frame (4) and / or the thermal insulation hood (3) in such a way that the retaining frame (4) is removable from and insertable into the thermal insulation hood (3), preferably by a linear movement.

10. Thermal insulation device (1) according to one of claims 1 to 9, characterized in that means for fastening at least one retaining frame (4) in the supporting structure of the thermal insulation hood (3) are provided, which are preferably designed such that the The support frame (4) is supported and fastened against the direction of the weight force.

11. Method for replacing at least one thermal insulation element (6) of a thermal insulation device (1) according to one of claims 1 to 10, characterized in that the at least one thermal insulation element (6) is replaced together with an associated retaining frame (4).

12. Method according to claim 11, characterized in that a plurality of thermal insulation elements (6) are exchanged on a common holding frame (4).

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