End tube plate with woven heat preservation anchoring structure, tube plate manufacturing method and heating furnace

Abstract

The invention relates to the technical field of petrochemical equipment, in particular to an end tube plate with a woven heat preservation anchoring structure, a tube plate manufacturing method and a heating furnace, the end tube plate comprises a supporting plate, a surrounding plate and a sleeve, the surrounding plate is fixed to the periphery of the supporting plate and extends out of the thickness direction of the supporting plate, and a pouring groove is defined by the end face of the supporting plate and the surrounding plate jointly; a plurality of positioning holes are formed in the supporting plate in a penetrating mode, and the multiple sleeves are fixed to the multiple positioning holes and extend into the pouring groove. Thread fixing parts are arranged on the inner side wall of the surrounding plate, the inner side wall of the supporting plate, the outer wall of the anchoring nail and / or the outer wall of the sleeve, and the weaving threads are bound, wound or lapped on the different thread fixing parts in sequence, so that the weaving threads shuttle and are interwoven in the space inside the pouring groove and outside the sleeve according to a preset route; pasty heat insulation filler is fully poured into the pouring groove, the heat insulation filler is solidified to form a heat preservation layer, and therefore the weaving wires are arranged in the heat preservation layer in a penetrating mode. And through the woven heat preservation anchoring structure, the fixing effect on the heat preservation material is improved, and the risk that the heat preservation material falls off is reduced.

Description

Technical Field

[0001] This invention relates to the field of petrochemical equipment technology, specifically to an end tube sheet with a braided insulation anchoring structure, a tube sheet manufacturing method, and a heating furnace. Background Technology

[0002] The convection section of a heating furnace generally consists of furnace walls, supporting components, and heat exchange tube bundles. The supporting components are further divided into end tube sheets and intermediate tube sheets. The intermediate tube sheet is exposed to the flue gas and is typically made of high-temperature resistant material. The end tube sheets, as components that seal the furnace chamber, have their inner sides facing the high-temperature flue gas, while their outer sides face a lower-temperature air-flue gas mixture, resulting in a significant temperature difference between the hot and cold surfaces.

[0003] To address the issue of large temperature differences, metal materials are typically used on the low-temperature side, while insulation materials are used on the high-temperature side, ultimately forming a structure of a metal plate with an additional insulation layer, which together with the furnace wall constitutes a closed flue gas flow channel.

[0004] Because the end tube sheet has pipe holes and pipe sleeves that pass through the insulation layer, the space for anchoring is relatively limited. In traditional technology, the insulation layer is usually fixed by anchor nails alone, but the fixing effect of these nails needs to be improved. After long-term use or when subjected to large vibrations, the insulation material is prone to falling off, increasing maintenance costs. Summary of the Invention

[0005] In view of the above-mentioned technical problems, the present invention provides an end tube sheet with a braided insulation anchoring structure, a tube sheet manufacturing method and a heating furnace, which increases the fixing effect of the insulation material of the end tube sheet and reduces the risk of insulation material falling off.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This application provides an end tube sheet with a braided anchoring structure, including a port for sealing the furnace, characterized in that: it includes a support plate, a surrounding plate and a sleeve, all of which are made of metal, the surrounding plate is fixed to the periphery of the support plate and extends from the thickness direction of the support plate, and the end face of the support plate and the surrounding plate together form a casting groove. The support plate has multiple positioning holes, and multiple sleeves are inserted and fixed in the multiple positioning holes and extend into the casting groove. Anchor pins extending into the casting groove are fixed to the side of the support plate at positions offset from the positioning holes. The inner wall of the enclosure, the inner wall of the support plate, the outer wall of the anchor nail and / or the outer wall of the sleeve are provided with a fixing part. The metal braided wire is tied, wrapped or laid on different fixing parts in sequence, so that the braided wire can shuttle and interweave in the space inside the casting groove and outside the sleeve according to the preset route. The space inside the casting tank and outside the sleeve is filled with paste-like heat insulation filler. The heat insulation filler solidifies to form a heat insulation layer, and then the braided wires are threaded through the heat insulation layer.

[0007] As a further alternative, the support plate is welded to the surrounding plate; and / or the sleeve is welded to the support plate.

[0008] As a further alternative, the enclosure and the support plate are arranged perpendicularly, and the ends of the sleeve, the insulation layer, and the end face of the enclosure are flush.

[0009] As a further alternative, the braided wires are interwoven to form a multi-layered braided mesh arranged along the axial direction of the sleeve, with braided wires transitioning between different layers of the braided mesh; or: the braided wires shuttle back and forth in the depth direction of the casting groove.

[0010] As a further alternative, different segments of the braided yarn are arranged in a cross pattern, and the cross points are fixed.

[0011] This application also provides a tube sheet manufacturing method for manufacturing the aforementioned end tube sheet with a braided anchoring structure, characterized by comprising the following steps: Frame construction steps: Fix the surrounding plate around the support plate, insert the fixing sleeve through the positioning hole of the support plate, and set the positioning part at the preset position; Winding steps: The braided wires are sequentially passed through different positioning sections, so that the braided wires are laid out according to the preset trajectory in the casting tank; Pouring steps: With the opening of the pouring tank facing upwards, pour the paste-like heat insulation filler into the pouring tank and let the heat insulation filler stand and solidify.

[0012] As a further alternative, a diagonal winding method can be used in the winding step: Step 1: Determine the position of the fixed line section on the opposite side panel. Starting from the first fixed line section position on the side panel, pull the braided wire at an angle towards the second fixed line section on the opposite side. If the braided wire interferes with the sleeve, attach it to the outside of the sleeve or connect it to the fixed line section outside the sleeve, thereby completing the fixed connection between the first fixed line section and the second fixed line section. Step 2: Diagonally lay the braided yarn between the third and fourth fixed sections, which are mirror images of the first step, and repeat this process to make the braided yarns intersect at different angles. Step 3: For sleeves that are not wrapped with braided wires, arrange the braided wires at the fixed part of the connecting plate separately; Step 4: Lock or spot weld the intersecting points of the braided wires to form a mesh structure.

[0013] As a further alternative, a wrap-around winding method can be used in the winding step: Step 1: Determine the position of the guide wire on the sleeve, wrap the braided wire around the outermost sleeve, and fix the braided wire to the guide wire outside the sleeve; Step 2: Use braided wire to horizontally bind multiple sleeves, winding them into multiple parallel line segments, and each line segment is fixed through the fixing part outside the sleeve; Step 3: Take a number of sleeves as a group, divide the sleeves into multiple groups, and wrap braided wire around the outside of each group of sleeves. The braided wire is arranged to intersect with the line segments in step 2. Step 4: For the sleeves that were not grouped in Step 3, braided wires are wound separately; Step 5: Lock or spot weld the intersecting points of the braided wires to form a mesh structure.

[0014] As a further alternative, in the winding step, an S-shaped winding method is adopted: the braiding wire is wound in an S-shaped trajectory, and adjacent S-directions are opposite, so that different segments of the braiding wire are arranged to cross each other.

[0015] This application also provides a heating furnace, including a furnace chamber with an end opening and an end tube sheet that seals the furnace chamber opening, wherein a heat exchange tube bundle is provided inside the furnace chamber, characterized in that: the end tube sheet is the end tube sheet with a braided anchoring structure, the periphery of the support plate is fixed to the furnace chamber, and the insulation layer faces into the furnace chamber.

[0016] The beneficial effects of this invention are: The end tube sheet with a braided insulation anchoring structure, the tube sheet manufacturing method, and the heating furnace of the present invention increase the fixing effect on the insulation material and reduce the risk of insulation material falling off through the braided insulation anchoring structure.

[0017] It should be noted that existing end-plate technologies can be viewed as a combination of a metal plate and an insulation layer. The metal plate and insulation layer are made of different materials; the metal plate is a complete plate with perforated pipes, while the insulation layer is made of non-metallic insulation material. Conventionally, the metal plate and insulation layer are considered independent structures, and the technical approach involves superimposing and fixing the prepared metal plate and insulation layer together, typically by adding anchoring nails to the metal plate after the perforations have been machined to secure the insulation layer. Functionally, the existing end-plates rely on the metal plate for strength and the insulation layer for thermal insulation.

[0018] In this application, after constructing a frame using a metal support plate, a paste-like heat-insulating filler is poured in, which cools and solidifies to form an insulation layer. That is, the insulation layer is a castable, paste-like material poured onto the high-temperature side of the tube sheet. After curing, the castable hardens and solidifies, increasing its hardness and strength. It is connected to the support plate via anchor bolts and interwoven braided wires. In terms of strength, the insulation layer and the support plate are firmly integrated, with virtually no possibility of separation.

[0019] The insulation layer serves both as conventional high-temperature insulation and as structural support for the original tube sheet, while the sleeves function as the original tube holes and also as a frame to support the insulation layer. By reshaping the end tube sheet, the metal frame and insulation layer are cleverly integrated, resulting in a significantly enhanced bond strength. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0021] Figure 1 This is a front view of the end tube sheet with a braided insulation anchoring structure in the embodiment.

[0022] Figure 2 This is a side sectional view of the end tube sheet with a braided thermal insulation anchoring structure in the embodiment.

[0023] Figure 3 It shows the relationship with Figure 2 Different wiring methods for braided yarns.

[0024] Figure 4 for Figure 2 An enlarged view shows a schematic diagram of the assembly of the enclosure, positioning section, insulation layer, and braided yarn.

[0025] Figure 5 This is a schematic diagram of a aligning section provided on the outer side of the sleeve in an embodiment.

[0026] Figure 6 This is a schematic diagram of the first method for positioning the outer side of the casing.

[0027] Figure 7 This is a schematic diagram of the second method for the positioning section on the outer side of the casing.

[0028] Figure 8 This is a schematic diagram of the third method for the positioning section on the outer side of the casing.

[0029] Figure 9a , Figure 9b , Figure 9c , Figure 9d This is a schematic diagram of the diagonal winding method in the embodiment.

[0030] Figure 10a , Figure 10b , Figure 10c , Figure 10d , Figure 10e This is a schematic diagram of the encircling winding method in the embodiment.

[0031] Figure 11This is a schematic diagram of the S-shaped winding method in the embodiment.

[0032] Figure label: 1. Support plate; 2. Enclosure plate; 3. Sleeve; 4. Anchor nail; Section 5, Alignment 6. Braided yarn; 7. Insulation layer. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] The end tube sheet of this embodiment has a braided thermal insulation anchoring structure, such as Figures 1 to 4 As shown, the system includes a support plate 1, a surrounding plate 2, and a sleeve 3, all made of metal. The surrounding plate 2 is fixed to the periphery of the support plate 1, which can be at the exact edge or near the edge. The two horizontal surrounding plates 2 in the figure are located near the edge of the support plate 1, with pre-drilled openings on their sides to connect to the furnace chamber. The upper and lower surrounding plates 2 are aligned and fixed to the edges of the support plate 1. The surrounding plates 2 extend from the same side of the support plate 1 in the thickness direction. The end face of the support plate 1 and the surrounding plates 2 together form a casting groove. In the figure, the support plate 1 is square, so the four surrounding plates 2 are connected end to end.

[0035] In this embodiment, the support plate 1 has multiple positioning holes, and multiple sleeves 3 are correspondingly inserted and fixed into the positioning holes and extend into the casting groove. Anchor nails 4 extending into the casting groove are fixed on the side of the support plate 1 at positions offset from the positioning holes.

[0036] The support plate 1 and the surrounding plate 2, the sleeve 3 and the support plate 1, and the anchoring nail 4 and the support plate 1 are welded and fixed together. Of course, if conditions permit, different structures made of the same metal material can be integrated into one structure.

[0037] The inner wall of the enclosure 2, the inner wall of the support plate 1, the outer wall of the anchor nail 4, and / or the outer wall of the sleeve 3 are provided with a guide wire 5. "And / or" means that one of these locations may have a guide wire 5, or two or more locations may have a guide wire 5 at the same time. The metal braided wire 6 is tied, wrapped, or laid on different guide wires 5 in sequence, so that the braided wire 6 can shuttle and interweave according to a preset route in the space inside the casting tank and outside the sleeve 3.

[0038] The braided wire 6 is a metal wire, preferably a steel wire. The braided wire 6 can be of uniform diameter or a combination of multiple diameters, with a diameter range of 0.1~6mm, preferably 0.6mm, 1mm, or 2.5mm. The braided wire 6 can be a continuous whole steel wire or multiple segmented steel wires.

[0039] The fixing part 5 is used to cooperate with the braiding thread 6 to fix or overlap and turn the braiding thread 6. For example... Figure 4 As shown, a protrusion is welded and fixed to the support plate 1. Holes or slots are provided on the protrusion as the guide section 5. The braided wire 6 passes through the holes or slots and then turns. In practice, the braided wire 6 can be knotted, wrapped, or overlapped at the guide section 5, as long as it can achieve the fixation / positioning and turning.

[0040] like Figure 5 The diagram shows a guide section 5 installed on the outer wall of the sleeve 3. Figure 6 The guide pin 51 is shown as the guide pin on the sleeve 3. The guide pin 51 is a straight pin or a bent pin. The guide pin 51 is provided with a groove or a protrusion 511 to position the braided wire 6. Figure 7 The guide section on the sleeve 3 is shown to be an insulating nail 52, which is V-shaped and has a protrusion 521 to position the braided wire 6. Figure 8 The guide plate 53 on the sleeve 3 is shown to be triangular and is typically equipped with binding points 531 to position the braided wires 6. The binding points 531 are holes or grooves. Of course, one or more of the above-mentioned positioning parts on the sleeve 3 can be selected to achieve the best reinforcement effect.

[0041] like Figure 2 As shown, the braided wires 6 interweave to form a multi-layered braided mesh arranged along the axial direction of the sleeve 3, with braided wires 6 transitioning between different layers. During winding, a layer of mesh is first wound from the position near the end face of the support plate 1, i.e., near the bottom of the casting trough, and then wound outwards layer by layer to form a multi-layered braided mesh. During the winding process, it can be a continuous, uninterrupted single wire, or multiple independent wires. Alternatively: during winding... Figure 3 As shown, the braided wires 6 interweave back and forth in the depth direction of the casting groove, that is, most of the braided wires 6 are inclined along the depth of the casting groove, which has a better three-dimensional effect and a better fixing effect with the subsequent casting insulation layer.

[0042] In this embodiment, different segments of the braided wire 6 after winding are arranged in a cross pattern and fixed at the intersection. They can be connected by spot welding or by setting cross buckles or other forms of detachable fixing methods.

[0043] After the above framework is built, the space inside the casting tank and outside the sleeve 3 is filled with paste-like heat insulation filler. The heat insulation filler solidifies to form the insulation layer 7. In this way, the braided wires 6 are threaded in the insulation layer 7. The braided wires 6 are interwoven in the insulation layer 7 and become part of the insulation layer 7, with no possibility of phase separation.

[0044] In this embodiment, the enclosure 2 is arranged perpendicularly to the support plate 1, and the port of the sleeve, the insulation layer and the end face of the enclosure 2 are flush.

[0045] In practical applications, in a heating furnace with an end tube plate having the aforementioned braided anchoring structure, the periphery of the support plate 1 is fixed to the furnace port, and the insulation layer faces into the furnace.

[0046] This embodiment also provides a tube sheet manufacturing method for manufacturing the aforementioned end tube sheet with a braided anchoring structure, comprising the following steps: Frame construction steps: Fix the surrounding plate 2 around the support plate 1, insert the fixing sleeve 3 through the positioning hole of the support plate 1, and set the alignment part 5 at the preset position. Winding steps: The braided wire 6 is sequentially passed through different positioning parts 5, so that the braided wire 6 is laid out in the casting groove according to the preset trajectory; Pouring steps: With the opening of the pouring tank facing upwards, pour the paste-like heat insulation filler into the pouring tank and let the heat insulation filler stand and solidify.

[0047] There are several ways to wind wire in practice: In the winding step, the first winding method uses a diagonal winding method: Step 1: As Figure 9a As shown, the position of the fixing part 5 on the opposite side panel 2 is determined. Starting from the position of the first fixing part 501 on the side panel 2, the braided wire 6 is pulled obliquely towards the second fixing part 502 at the opposite position. If the braided wire 6 interferes with the sleeve 3, it is attached to the outside of the sleeve 3 or connected to the fixing part outside the sleeve 3, thereby completing the fixed connection between the first fixing part 501 and the second fixing part 502. Step 2: As Figure 9b As shown, inclined wiring is applied between the third and fourth fixing sections 503 and 504, which are mirror images of the first step, and this process is repeated to ensure that the segments of the braided filaments 6 are inclined and intersecting. Figure 9c As shown; Step 3: For the sleeve 3 that is not wrapped by the braided wire 6, arrange the braided wire 6 separately at the fixed part 5 of the connecting plate 2. Step 4: Secure the braided wires at their intersections using locking or spot welding. Consider the overall layout of the end plate and make local adjustments to complete the installation. The braided wires will ultimately form a mesh structure, as shown below. Figure 9d As shown.

[0048] In the winding step, the second winding method adopts the encircling winding method, which is a further variation of the diagonal winding method. It is suitable for situations where the enclosure plate 2 is not suitable for bearing force. It mainly relies on the sleeve 3 as the main installation component, and the fixed part 5 on the sleeve 3 is used as the starting point for installation.

[0049] Step 1: As Figure 10a As shown, the position of the fixing part 5 on the sleeve 3 is determined, and the braided wire 6 is wrapped around the outermost sleeve 3. The braided wire 6 is fixed to the fixing part 5 outside the sleeve 3. Step 2: As Figure 10b As shown, multiple sleeves 3 are horizontally bound together with braided wire 6 to form multiple parallel line segments, and each line segment is fixed by the fixing part 5 outside the sleeve 3. Step 3: As Figure 10c As shown, two or more sleeves 3 are grouped together, and multiple sleeves 3 are divided into multiple groups. Shared sleeves 3 are allowed between groups of sleeves 3. Braided wire 6 is wrapped around the outside of each group of sleeves 3. This braided wire 6 is arranged to intersect with the line segments from the second step, as shown. Figure 10d As shown; Step 4: As Figure 10e As shown, for the sleeve 3 that was not grouped in the third step, the braided wire 6 is wound separately; Step 5: Consider the overall layout of the end tube sheet and make local adjustments. Tighten or spot weld the intersecting braided wires 6 from the previous steps to complete the installation and finally form a mesh structure.

[0050] In the winding step, the third winding method adopts the S-shaped winding method, such as... Figure 11 As shown, the braided wires 6 are wound in an S-shaped trajectory, with adjacent S-directions in opposite directions, so that different segments of the braided wires 6 are arranged in an intersecting pattern. This is a further variation of the diagonal installation method and the surrounding installation method. The difference is that the braided wires 6 fit the sleeve 3 more precisely, no longer adhering to a fixed installation form, but arranged in an S-shape along the tangent direction of the sleeve 3 according to the arrangement of the sleeve 3. The advantage is that it is more in line with actual needs and more flexible.

[0051] In the description of this invention, it is obvious that the described embodiments are merely a part of the embodiments of the invention, and not all of them. The components of the embodiments of the invention described and illustrated herein can generally be arranged and designed in various different configurations.

[0052] Therefore, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0053] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. An end tube sheet with a braided anchoring structure for sealing the ports of a furnace, characterized in that: It includes a support plate, a surrounding plate, and a sleeve, all made of metal. The surrounding plate is fixed around the perimeter of the support plate and extends from the thickness direction of the support plate. The end face of the support plate and the surrounding plate together form a casting groove. The support plate has multiple positioning holes, and multiple sleeves are inserted and fixed in the multiple positioning holes and extend into the casting groove. Anchor pins extending into the casting groove are fixed to the side of the support plate at positions offset from the positioning holes. The inner wall of the enclosure, the inner wall of the support plate, the outer wall of the anchor nail and / or the outer wall of the sleeve are provided with a fixing part. The metal braided wire is tied, wrapped or laid on different fixing parts in sequence, so that the braided wire can shuttle and interweave in the space inside the casting groove and outside the sleeve according to the preset route. The space inside the casting tank and outside the sleeve is filled with paste-like heat insulation filler. The heat insulation filler solidifies to form a heat insulation layer, and then the braided wires are threaded through the heat insulation layer.

2. The end tube sheet with a braided anchoring structure according to claim 1, characterized in that: The support plate is welded and fixed to the surrounding plate; and / or the sleeve is welded and fixed to the support plate.

3. The end tube sheet with a braided anchoring structure according to claim 1, characterized in that: The enclosure and support plate are arranged perpendicularly, and the ends of the sleeve, the insulation layer, and the end face of the enclosure are flush.

4. The end tube sheet with a braided anchoring structure according to claim 1, characterized in that: The braided wires shuttle and interweave to form a multi-layered braided mesh arranged along the axial direction of the sleeve, with braided wires transitioning between different layers of the braided mesh; or: the braided wires shuttle and interweave back and forth in the depth direction of the casting groove.

5. The end tube sheet with a braided anchoring structure according to claim 5, characterized in that: Different segments of the braided yarn are arranged in a cross pattern, and the cross points are fixed.

6. A method for manufacturing tube sheets, used to manufacture end tube sheets with a braided anchoring structure as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Frame construction steps: Fix the surrounding plate around the support plate, insert the fixing sleeve through the positioning hole of the support plate, and set the positioning part at the preset position; Winding steps: The braided wires are sequentially passed through different positioning sections, so that the braided wires are laid out according to the preset trajectory in the casting tank; Pouring steps: With the opening of the pouring tank facing upwards, pour the paste-like heat insulation filler into the pouring tank and let the heat insulation filler stand and solidify.

7. The tube sheet manufacturing method according to claim 6, characterized in that: in In the winding step, the diagonal winding method is used: Step 1: Determine the position of the fixed line section on the opposite side panel. Starting from the first fixed line section position on the side panel, pull the braided wire at an angle towards the second fixed line section on the opposite side. If the braided wire interferes with the sleeve, attach it to the outside of the sleeve or connect it to the fixed line section outside the sleeve, thereby completing the fixed connection between the first fixed line section and the second fixed line section. Step 2: Diagonally lay the braided yarn between the third and fourth fixed sections, which are mirror images of the first step, and repeat this process to make the braided yarns intersect at different angles. Step 3: For sleeves that are not wrapped with braided wires, arrange the braided wires at the fixed part of the connecting plate separately; Step 4: Lock or spot weld the intersecting points of the braided wires to form a mesh structure.

8. The tube sheet manufacturing method according to claim 6, characterized in that: in In the winding step, a wrap-around winding method is used: Step 1: Determine the position of the guide wire on the sleeve, wrap the braided wire around the outermost sleeve, and fix the braided wire to the guide wire outside the sleeve; Step 2: Use braided wire to horizontally bind multiple sleeves, winding them into multiple parallel line segments, and each line segment is fixed through the fixing part outside the sleeve; Step 3: Take a number of sleeves as a group, divide the sleeves into multiple groups, and wrap braided wire around the outside of each group of sleeves. The braided wire is arranged to intersect with the line segments in step 2. Step 4: For the sleeves that were not grouped in Step 3, braided wires are wound separately; Step 5: Lock or spot weld the intersecting points of the braided wires to form a mesh structure.

9. The tube sheet manufacturing method according to claim 6, characterized in that: in In the winding step, the S-shaped winding method is adopted: the braiding wire is wound in an S-shaped trajectory, and the adjacent S directions are opposite, so that the different segments of the braiding wire are arranged crosswise.

10. A heating furnace, comprising a furnace chamber with an end opening and an end tube sheet sealing the furnace chamber opening, wherein a heat exchange tube bundle is arranged inside the furnace chamber, characterized in that: The end tube sheet is the end tube sheet with a braided anchoring structure as described in any one of claims 1 to 5, wherein the periphery of the support plate is fixed to the furnace, and the insulation layer faces into the furnace.

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