Heating furnace supporting beam heat insulation binding structure and preparation method and installation method thereof

Abstract

The invention discloses a heating furnace supporting beam heat insulation binding structure and a preparation method and installation method thereof.The binding structure comprises at least one pair of prefabricated blocks which are symmetrically arranged on the two sides of a binding target and wrap the binding target, and the shape of the surface, close to the binding target, of each prefabricated block is consistent with the shape of the outer surface of the binding target; the casting part is far away from one side of a binding target, the refractory fiber blanket is close to one side of the binding target, the anchoring hooks are connected to the connecting metal pieces at intervals, the refractory fiber blanket is arranged in the middle of the precast block in the length direction of the binding target, and the connecting metal pieces are arranged on the two sides of the refractory fiber blanket. The refractory fiber blanket and the connecting metal piece are connected into a whole through the casting part, a mounting hole extending from the surface to the connecting metal piece is formed in the casting part, a welding hole aligned with the center of the mounting hole is formed in the connecting metal piece, and the prefabricated block is welded and fixed to a binding target through the connecting metal piece. The method has the advantages that construction is time-saving, and coating is stable.

Description

Technical Field

[0001] The invention relates to the technical field of heating furnaces, and in particular to a heat insulation wrapping structure of a heating furnace support beam and a preparation method and an installation method thereof. Background Art

[0002] At present, walking beam heating furnaces are widely used in the steel rolling process of the metallurgical industry, mainly for heating steel billets before rolling, and the heating temperature is generally 1000℃~1300℃. Since the temperature inside the heating furnace is very high, the support beams inside the furnace need to be cooled by water, and the outside of the support beams need to be insulated to reduce the consumption of cooling water and save energy.

[0003] Conventional support beam wrapping adopts an insulation structure of refractory fiber blanket + castable, with the refractory fiber blanket on the inside (cold side) and the castable on the outside (hot side). This support beam wrapping solution requires setting up molds on site for construction, which has the following problems: First, the construction is difficult and the cycle is long, and the construction quality is difficult to guarantee; second, the castable constructed on site needs to be baked at high temperature for a long time before it can be used; third, due to thermal expansion, the integrally cast wrapping structure will produce cracks of varying degrees during baking and use, which will ultimately affect the service life and insulation effect. Summary of the invention

[0004] The purpose of the present invention is to provide a heating furnace support beam insulation wrapping structure and its preparation method and installation method, at least to solve the problem of long wrapping construction time and short service life of the walking beam type heating furnace support beam in the prior art.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a heat insulation wrapping structure for a heating furnace support beam, which is used to wrap a wrapping target, and comprises: at least one pair of prefabricated blocks, at least one pair of prefabricated blocks are symmetrically arranged on both sides of the wrapping target and wrap the wrapping target, and the surface shape of the prefabricated block close to the wrapping target is consistent with the outer surface shape of the wrapping target; the prefabricated block comprises a casting part, a refractory fiber blanket, a connecting metal part and a plurality of anchor hooks, the casting part is arranged on a side away from the wrapping target, the refractory fiber blanket and the A connecting metal part is arranged on a side close to the bandaging target and along the length direction of the bandaging target. The refractory fiber blanket is arranged in the middle of the prefabricated block. Connecting metal parts are arranged on both sides of the refractory fiber blanket. A plurality of anchor hooks are connected at intervals on the connecting metal part. The refractory fiber blanket and the connecting metal part are connected as a whole through the casting part. A mounting hole extending from the surface to the connecting metal part is formed on the casting part. A welding hole aligned with the center of the mounting hole is provided on the connecting metal part. The prefabricated block is welded and fixed to the bandaging target through the connecting metal part.

[0007] Specifically, the bandaging target includes a single column, a double column and a longitudinal beam; the longitudinal beam includes an upper tube and a lower tube that are spaced and connected along the direction of gravity, and a pad is connected to the upper tube. When the bandaging target is a longitudinal beam, the prefabricated block forms a groove at one end close to the pad to accommodate the pad.

[0008] Preferably, the notch is outwardly expanding, and the opening angle of the notch is 120° to 160°.

[0009] Preferably, a first preset gap is provided between the prefabricated block and the binding target, and a second preset gap is provided between two mutually adjacent surfaces of the same pair of prefabricated blocks.

[0010] Preferably, the prefabricated blocks are in a plurality of pairs, and along the length direction of the bandaging target, a third preset gap is provided between two adjacent pairs of the prefabricated blocks.

[0011] Preferably, the first preset gap, the second preset gap and the third preset gap are 2 mm to 5 mm.

[0012] Preferably, the connecting metal part includes a metal half ring and a reinforcement plate, the reinforcement plate is arranged in the mounting hole and fixedly connected to the metal half ring, the reinforcement plate and the metal half ring are both provided with the welding holes, and the metal half ring is provided with a plurality of anchor hooks circumferentially spaced apart from the reinforcement plate.

[0013] Preferably, the mounting hole is a cylindrical hole, and along the circumferential covering direction of the prefabricated block, the mounting hole is arranged at the center of the casting part.

[0014] Another object of the present invention is to provide a method for preparing the insulation wrapping structure of the heating furnace support beam as described above, comprising: preparing a mold; welding and fixing the connecting metal parts and anchor hooks, and placing them in corresponding positions of the mold; filling the mold with castables; pre-baking and forming; removing the mold, and bonding the refractory fiber blanket.

[0015] The present invention also provides an installation method for the above-mentioned insulation wrapping structure of the heating furnace support beam, comprising: applying refractory putty on the end surface of the prefabricated block where it is combined with other prefabricated blocks; installing one of the prefabricated blocks coated with refractory putty on one side of the wrapping target, and welding and fixing the connecting metal parts of the prefabricated block to the wrapping target; installing another prefabricated block coated with refractory putty on the other side of the wrapping target, and welding and fixing the connecting metal parts of the prefabricated block to the wrapping target; filling refractory putty into the installation hole of the prefabricated block fixed on the wrapping target, and removing the refractory putty overflowing between the prefabricated blocks.

[0016] The characteristics and advantages of the present invention are: the insulating wrapping structure of the heating furnace support beam provided by the present invention uses prefabricated blocks to wrap the wrapping target, so as to greatly shorten the construction time; and by arranging connecting metal parts and anchor hooks in the prefabricated blocks, the structural strength of the prefabricated blocks is guaranteed; and by respectively opening center-aligned mounting holes and welding holes on the casting part and the connecting metal parts, it is convenient for welding tools to extend into and weld and fix the connecting metal parts to the wrapping target, thereby achieving stable wrapping of the prefabricated blocks and the wrapping target; the insulating wrapping structure of the heating furnace support beam provided by the present invention has the advantages of time-saving construction, convenient operation and stable wrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the state of wrapping the support beam of the heating furnace support beam provided in the embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the wrapping state of the single column wrapping prefabricated block provided in the embodiment of the present invention when the installation hole is not filled with refractory mortar;

[0020] Figure 3 for Figure 2 AA section view;

[0021] Figure 4 for Figure 2 BB cross-sectional view;

[0022] Figure 5 It is a schematic diagram of the wrapping state of the double-column wrapping prefabricated block provided in an embodiment of the present invention when the installation hole is not filled with refractory mortar;

[0023] Figure 6 for Figure 5 CC section view;

[0024] Figure 7 for Figure 5 DD cross-sectional view;

[0025] Figure 8 It is a schematic diagram of the wrapping state of the longitudinal beam wrapping prefabricated block provided in the embodiment of the present invention when the installation hole is not filled with refractory mortar;

[0026] Fig. 9 for Figure 8 EE cross-sectional view;

[0027] Fig.10 for Figure 8 FF cross-sectional view;

[0028] Fig.11 It is a schematic diagram of the wrapping state of the longitudinal beam wrapping prefabricated block provided in an embodiment of the present invention after the installation hole is filled with refractory cement.

[0029] Description of Figure Numbers:

[0030] 1. Casting part; 11. Mounting hole;

[0031] 2. Refractory fiber blanket;

[0032] 3. Connecting metal parts; 31. Metal ring; 32. Reinforcement plate;

[0033] 4. Anchor hook;

[0034] 5. Refractory clay;

[0035] 10. Single column;

[0036] 20. Double columns;

[0037] 30. Stringer;

[0038] 40. Pad;

[0039] 50. Single column wrapped prefabricated blocks;

[0040] 60. Double column wrapping prefabricated blocks;

[0041] 70. Wrap the longitudinal beam with prefabricated blocks. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 11 As shown, the present invention provides a heat insulation wrapping structure for a heating furnace support beam, which is used to wrap a wrapping target, and includes at least one pair of prefabricated blocks, which are symmetrically arranged on both sides of the wrapping target and wrap the wrapping target, and the surface shape of the prefabricated block close to the wrapping target is consistent with the outer surface shape of the wrapping target, so that the prefabricated block can wrap the wrapping target. The prefabricated block includes a casting part 1, a refractory fiber blanket 2, a connecting metal part 3 and a plurality of anchor hooks 4, the casting part 1 is arranged on the side away from the wrapping target, the refractory fiber blanket 2 and the connecting metal part 3 are arranged on the side close to the wrapping target, and along the length direction of the wrapping target, the refractory fiber blanket 2 is arranged in the middle of the prefabricated block, the connecting metal parts 3 are arranged on both sides of the refractory fiber blanket 2, and the connecting metal parts 3 are connected to a plurality of anchor hooks 4 at intervals to ensure the structural strength of the prefabricated block. The refractory fiber blanket 2 and the connecting metal part 3 are connected to form a whole through the casting part 1. The casting part 1 is formed with a mounting hole 11 extending from the surface to the connecting metal part 3. The connecting metal part 3 is provided with a welding hole aligned with the center of the mounting hole 11 to facilitate the covering connection construction, so that the prefabricated block is welded and fixed to the wrapping target through the connecting metal part 3. Among them, the thickness of the casting part 1 and the refractory fiber blanket 2 can be flexibly set according to the furnace space and usage requirements of the heating furnace. Furthermore, the refractory fiber blanket 2 can adopt a composite structure, which is divided into 2 layers or multiple layers. In addition to a layer of fiber blanket, the other layer or layers are insulating materials with better insulating properties such as nano-insulating materials, so as to achieve better thermal insulation effects, which is beneficial to saving cooling water and energy.

[0044] Specifically, Figures 1 to 11As shown, the insulation wrapping structure of the heating furnace support beam includes a plurality of pairs of prefabricated blocks arranged in sequence along the length direction of the wrapping target, each pair of prefabricated blocks includes two left and right blocks, the left and right prefabricated blocks are symmetrically arranged on both sides of the wrapping target and wrap the wrapping target, the prefabricated block is provided with a mounting hole 11 that penetrates the casting part 1 and extends to the connecting metal part 3, the connecting metal part 3 is provided with a welding hole aligned with the center of the mounting hole 11, the welding hole is a through hole, so that the welding tool can be inserted between the connecting metal part 3 and the wrapping target through the mounting hole 11 and the welding hole, and the connecting metal part 3 and the wrapping target are welded and fixed, thereby realizing a stable wrapping of the prefabricated block and the wrapping target. After the prefabricated block and the wrapping target are welded and fixed, the mounting hole 11 is sealed by filling the mounting hole 11 with refractory cement 5 to ensure the integrity and overall structural strength of the prefabricated block, thereby ensuring the service life of the prefabricated block.

[0045] Preferably, along the length direction of the wrapped target, the length of the refractory fiber blanket 2 is half the length of the prefabricated block to ensure the insulation effect. Among them, the connecting metal piece 3 is extended along the circumferential wrapping direction of the prefabricated block, and a plurality of anchor hooks 4 are arranged at intervals along the extension direction of the connecting metal piece 3 and extend between the connecting metal piece 3 and the casting part 1. Preferably, the anchor is V-shaped or Y-shaped, and the opening of the anchor hook 4 is arranged toward the casting part 1 to further improve the structural strength of the prefabricated block. In order to reduce the degree of weakening of the structural strength of the prefabricated block caused by the mounting hole 11 and the welding hole, the mounting hole 11 and the welding hole are both circular holes whose center lines are perpendicular to the center line of the prefabricated block. In this embodiment, the length of the prefabricated block is 300mm and the thickness is 60mm; the length of the refractory fiber blanket 2 is 150mm and the thickness is 20mm; the center of the connecting metal piece 3 is set 50mm from the end of the prefabricated block, and its thickness is less than the length of the end section of the small-diameter welding head of the welding tool; the diameter of the mounting hole 11 is 35mm, and the diameter of the welding hole is 10mm.

[0046] According to a preferred embodiment of the present invention, the mounting hole 11 is a cylindrical hole, and along the circumferential covering direction of the prefabricated block, the mounting hole 11 is arranged at the center of the casting part 1. Specifically, Figure 2-Figure 3 , Figure 5-Figure 6 and Figure 8-Figure 9 As shown, the mounting hole 11 is vertically arranged at the center position of the casting part 1 along the circumferential wrapping direction, so that it is convenient to realize the stable connection between the prefabricated block and the wrapping target, and the degree to which the mounting hole 11 weakens the structural strength of the prefabricated block can be minimized.

[0047] It should be noted that for special parts of the supporting beam, such as the end of the longitudinal beam 30, the connection between the longitudinal beam 30 and the single column 10, the connection between the longitudinal beam 30 and the double column 20, and the connection area between the longitudinal beam 30 and the pad 40, due to the diverse structures, it is not suitable to make prefabricated blocks with a unified template. Therefore, these special parts are not equipped with prefabricated blocks, and traditional wrapping structures are used for on-site pouring.

[0048] The insulating wrapping structure of the heating furnace support beam provided by the present invention uses prefabricated blocks to wrap the wrapping target, so as to greatly shorten the construction time; and by arranging connecting metal parts 3 and anchor hooks 4 in the prefabricated blocks, the structural strength of the prefabricated blocks is ensured; and by respectively opening center-aligned mounting holes 11 and welding holes on the casting part 1 and the connecting metal parts 3, it is convenient for welding tools to extend into and weld and fix the connecting metal parts 3 to the wrapping target, thereby achieving a stable wrapping of the prefabricated blocks and the wrapping target; the insulating wrapping structure of the heating furnace support beam provided by the present invention has the advantages of time-saving construction, convenient operation, and stable wrapping.

[0049] Specifically, the target of the wrapping includes a single column 10, a double column 20 and a longitudinal beam 30; the longitudinal beam 30 includes an upper tube and a lower tube spaced and connected along the gravity direction to increase the bearing capacity of the longitudinal beam 30; a cushion block 40 is connected to the upper tube, and when the target of the wrapping is the longitudinal beam 30, a notch is formed at one end of the prefabricated block close to the cushion block 40 to accommodate the cushion block 40. Specifically, as Figures 1 to 11 As shown, the wrapping target using prefabricated blocks includes a single column 10, a double column 20 and a longitudinal beam 30, wherein, as Figure 3 and Figure 4 As shown, the single column 10 is a cylindrical tube column, and correspondingly, the prefabricated block used to wrap the single column 10 is semicircular, that is, the single column wrapping prefabricated block 50; Figure 6 and Figure 7 As shown, the double column 20 includes two cylindrical columns arranged side by side at intervals, and the two cylindrical columns are connected by a rib plate. Correspondingly, the prefabricated block used to wrap the double column 20 is in a semi-waist ring shape, that is, the double column wrapping prefabricated block 60; Figures 9 to 11 As shown, the longitudinal beam 30 includes an upper tube and a lower tube which are arranged side by side at intervals along the direction of gravity, the upper tube and the lower tube are connected by a rib plate, and a pad 40 with an irregular shape is connected above the upper tube. Correspondingly, the prefabricated block used to wrap the double columns 20 is in an incomplete half-waist ring shape, that is, the longitudinal beam wrapping prefabricated block 70. A groove for accommodating the pad 40 is formed at one end of the longitudinal beam wrapping prefabricated block 70 close to the pad 40, so that the traditional wrapping structure can be used to wrap this part of the longitudinal beam 30 (that is, the connection area between the above-mentioned longitudinal beam 30 and the pad 40), and the mounting hole 11 is no longer provided on the end of the longitudinal beam wrapping prefabricated block 70 where the groove is formed.

[0050] According to a preferred embodiment of the present invention, Figures 9 to 11 As shown, the notch is outwardly expanded, and the opening angle of the notch is 120° to 160°. In this way, the prefabricated block wrapping and the traditional wrapping are combined to simply and conveniently complete the wrapping of the longitudinal beam 30.

[0051] According to a preferred embodiment of the present invention, a first preset gap is provided between the prefabricated block and the target to be wrapped, and a second preset gap is provided between two surfaces of the same pair of prefabricated blocks that are close to each other. By presetting the gap between the prefabricated block and the target to be wrapped and between two symmetrically arranged prefabricated blocks, the influence of thermal expansion on the target to be wrapped and the prefabricated block can be compensated, thereby increasing the service life of the prefabricated block.

[0052] According to a preferred embodiment of the present invention, there are multiple pairs of prefabricated blocks, and a third preset gap is provided between two adjacent pairs of prefabricated blocks along the length direction of the wrapped target. By presetting the gap between each pair of prefabricated blocks, the influence of thermal expansion on the adjacent pairs of prefabricated blocks is compensated, thereby further improving the service life of the prefabricated blocks.

[0053] According to a preferred embodiment of the present invention, the first preset gap, the second preset gap and the third preset gap are 2 mm to 5 mm. By reasonably setting the preset gaps, both construction convenience and coating effect can be taken into consideration.

[0054] According to a preferred embodiment of the present invention, the connecting metal member 3 includes a metal half ring and a reinforcing plate 32. The reinforcing plate 32 is disposed in the mounting hole 11 and fixedly connected to the metal half ring. The reinforcing plate 32 and the metal half ring are both provided with welding holes. A plurality of anchor hooks 4 staggered from the reinforcing plate 32 are arranged circumferentially on the metal half ring. Specifically, Figure 3 , Figure 6 and Fig. 9 As shown, the connecting metal part 3 includes a metal half ring sleeved outside the wrapped target and a reinforcing plate 32 arranged on the surface of the metal half ring away from the wrapped target. The reinforcing plate 32 and the metal half ring are both provided with welding holes aligned with the center of the mounting hole 11. In this way, the structural strength of the area where the mounting hole 11 is provided on the prefabricated block is ensured on the basis of facilitating the welding and fixing of the prefabricated block and the wrapped target. Preferably, the arrangement angle between two adjacent anchor hooks 4 on the metal half ring is 50° to 60° to obtain a better structural strength of the prefabricated block.

[0055] To ensure the connection strength between the reinforcing plate 32, the metal half ring and the casting part 1, the reinforcing plate 32 is preferably a circular plate with a diameter larger than the diameter of the mounting hole 11. In this embodiment, the reinforcing plate 32 has a diameter of 40 mm and a thickness of 5 mm; the metal half ring has a thickness of 3 mm.

[0056] Based on the above description, the insulation wrapping structure of the heating furnace support beam provided by the embodiment of the present invention has the following beneficial effects:

[0057] The insulating wrapping structure of the heating furnace support beam provided in the embodiment of the present invention uses prefabricated blocks to wrap the wrapping target to greatly shorten the construction time; and by arranging connecting metal parts 3 and anchor hooks 4 in the prefabricated blocks, the structural strength of the prefabricated blocks is ensured; and by respectively opening center-aligned mounting holes 11 and welding holes on the casting part 1 and the connecting metal parts 3, it is convenient for welding tools to extend into and weld and fix the connecting metal parts 3 to the wrapping target, thereby achieving a stable wrapping of the prefabricated block and the wrapping target; further, the present application pre-sets gaps between the prefabricated block and the wrapping target, between two symmetrically arranged prefabricated blocks, and between two adjacent pairs of prefabricated blocks to compensate for the influence of thermal expansion on the wrapping target and the prefabricated block, thereby improving the service life of the prefabricated block; the insulating wrapping structure of the heating furnace support beam provided by the present invention has the advantages of time-saving construction, convenient operation, stable wrapping, and long service life.

[0058] Another object of the present invention is to provide a method for preparing the above-mentioned insulating wrapping structure of the heating furnace support beam, comprising: preparing the mold; welding and fixing the connecting metal parts 3 and the anchor hooks 4, and placing them in the corresponding positions of the mold; filling the mold with castables; pre-baking and forming; taking the mold, and bonding the refractory fiber blanket 2. Among them, for the bonding of the refractory fiber blanket 2 in the last step, the refractory fiber blanket 2 can be cut on site when preparing for the wrapping construction, and the refractory fiber blanket 2 can be attached to the inside of the removed mold using adhesive materials to form a complete prefabricated block, thereby ensuring the position accuracy of the refractory fiber blanket 2 relative to the casting part 1 during the wrapping operation, and avoiding the failure of the adhesive material performance under long-term preparation, resulting in secondary bonding, thereby affecting the wrapping efficiency and wrapping effect.

[0059] Since the long-term use temperature of the prefabricated block is not less than 1350℃, the main performance indicators of the components of the prefabricated block are as follows: Al in the castable 2 O 3 Content not less than 65%, SiO 2 The content is not less than 30%, and the density of the castable is not less than 1.8g / cm 3 The permanent linear change rate of the castable at 110°C is about 0.03%, the thermal conductivity of the castable at 200°C is about 0.13Kcal / mh°C, the thermal conductivity of the castable at 500°C is about 0.17Kcal / mh°C, and the compressive strength of the castable is 20-50kg / cm 2 ; The fiber blanket is made of high-purity ceramic fiber blanket; the anchor hook 4 and the connecting metal part 3 are made of Cr 25 Ni 20 ; The pre-baking temperature of the prefabricated block is about 600℃.

[0060] The present invention also provides an installation method for the above-mentioned heating furnace support beam insulation wrapping structure, comprising: applying refractory putty 5 on the end surface of the prefabricated block where it is combined with other prefabricated blocks; installing a prefabricated block coated with refractory putty 5 on one side of the wrapping target, and welding and fixing the connecting metal parts 3 of the prefabricated block to the wrapping target; installing another prefabricated block coated with refractory putty 5 on the other side of the wrapping target, and welding and fixing the connecting metal parts 3 of the prefabricated block to the wrapping target; filling the installation hole 11 of the prefabricated block fixed on the wrapping target with refractory putty 5, and removing the refractory putty 5 overflowing between the prefabricated blocks.

[0061] When bandaging, the bandaging operation is started from one end of the bandaging target, and the first preset gap and the second preset gap must be left during the operation. When a pair of prefabricated blocks are bandaged, the above process is repeated along the length direction of the bandaging target with a third preset gap between them, and the bandaging target including the single column 10, the double column 20 and the longitudinal beam 30 can be completely bandaged.

[0062] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A heating furnace support beam insulation wrapping structure, characterized in that: The heating furnace support beam insulation wrapping structure is used to wrap the wrapping target, and the heating furnace support beam insulation wrapping structure includes: At least one pair of prefabricated blocks, wherein at least one pair of the prefabricated blocks are symmetrically arranged on both sides of the bandage target and cover the bandage target, and the surface shape of the prefabricated blocks close to the bandage target is consistent with the outer surface shape of the bandage target; The prefabricated block includes a casting part, a refractory fiber blanket, a connecting metal part and a plurality of anchor hooks. The casting part is arranged on a side away from the bandaging target, the refractory fiber blanket and the connecting metal part are arranged on a side close to the bandaging target, and along the length direction of the bandaging target, the refractory fiber blanket is arranged in the middle of the prefabricated block, connecting metal parts are arranged on both sides of the refractory fiber blanket, and a plurality of the anchor hooks are connected to the connecting metal part at intervals. The refractory fiber blanket and the connecting metal part are connected to form a whole through the casting part, and a mounting hole extending from the surface to the connecting metal part is formed on the casting part, and a welding hole aligned with the center of the mounting hole is formed on the connecting metal part, and the prefabricated block is welded and fixed to the bandaging target through the connecting metal part.

2. The insulation wrapping structure of the heating furnace support beam according to claim 1 is characterized in that: A first preset gap is provided between the prefabricated block and the binding target, and a second preset gap is provided between two surfaces of the same pair of prefabricated blocks that are close to each other.

3. The insulation wrapping structure of the heating furnace support beam according to claim 2 is characterized in that: The prefabricated blocks are in a plurality of pairs, and along the length direction of the bandaging target, a third preset gap is provided between two adjacent pairs of the prefabricated blocks.

4. The insulation wrapping structure of the heating furnace support beam according to claim 3 is characterized in that: The first preset gap, the second preset gap and the third preset gap are 2 mm to 5 mm.

5. The insulation wrapping structure of the heating furnace support beam according to claim 1 is characterized in that: The bandaging targets include single columns, double columns and longitudinal beams; The longitudinal beam comprises an upper tube and a lower tube which are spaced and connected along the gravity direction, the upper tube is connected with a cushion block, and when the wrapping target is the longitudinal beam, a notch for accommodating the cushion block is formed at one end of the prefabricated block close to the cushion block.

6. The insulation wrapping structure of the heating furnace support beam according to claim 5, characterized in that: The notch is outwardly expanding, and the opening angle of the notch is 120° to 160°.

7. The insulation wrapping structure of the heating furnace support beam according to claim 1 is characterized in that: The connecting metal part includes a metal half ring and a reinforcing plate, wherein the reinforcing plate is arranged in the mounting hole and fixedly connected to the metal half ring, the reinforcing plate and the metal half ring are both provided with the welding holes, and a plurality of the anchor hooks staggered with the reinforcing plate are circumferentially arranged on the metal half ring at intervals.

8. The insulation wrapping structure of the heating furnace support beam according to claim 1 is characterized in that: The mounting hole is a cylindrical hole, and is arranged at the center of the casting portion along the circumferential covering direction of the prefabricated block.

9. A method for preparing the insulation wrapping structure of a heating furnace support beam according to any one of claims 1 to 8, characterized in that: include: Mould preparation; Weld the connecting metal parts and anchor hooks and put them into the corresponding positions of the mold; Filling the mold with castable material; Pre-baking and forming; The mold is taken and the refractory fiber blanket is bonded.

10. A method for installing the insulation wrapping structure of a heating furnace support beam according to any one of claims 1 to 8, characterized in that: include: Apply refractory cement to the end surface of the prefabricated block combined with other prefabricated blocks; Installing a piece of the prefabricated block coated with refractory cement on one side of the binding target, and welding and fixing the connecting metal piece of the prefabricated block to the binding target; Installing another prefabricated block coated with refractory cement on the other side of the binding target, and welding and fixing the connecting metal piece of the prefabricated block to the binding target; The mounting holes of the prefabricated blocks fixed on the binding target are filled with refractory cement, and the refractory cement overflowing between the prefabricated blocks is removed.

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