Composite chimney

Abstract

The present application provides a kind of composite chimney, including surrounding wall sandwich panel and transverse wall plate, the surrounding wall sandwich panel is enclosed the circumferential side wall of chimney, the transverse wall plate is vertically arranged with surrounding wall sandwich panel, the transverse wall plate is same with surrounding wall sandwich panel material, the connecting part of the transverse wall plate and surrounding wall sandwich panel is connected by connecting layer, solid laminated plate is provided on the surrounding wall sandwich panel, the solid laminated plate is connected with door and window mounting flange, door and window are installed on the surrounding wall sandwich panel by the door and window mounting flange and solid laminated plate, metal slot is provided on the main hull deck, the surrounding wall sandwich panel is installed in metal slot, realize the fixed installation of composite chimney on the main hull deck.Due to the adoption of carbon fiber reinforced high temperature resistant vinyl resin sandwich composite material, the weight of chimney is greatly reduced, the overall weight of ship is reduced, the speed and energy utilization are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shipbuilding, and in particular, to a composite chimney. BACKGROUND

[0002] Composite materials can significantly improve the performance and service life of ships due to their unique properties. Composite materials have the advantages of high specific strength, high specific modulus, lightweight, corrosion resistance, excellent designability, easy construction performance and easy maintenance, and the maintenance cost is much lower than that of steel ships, so composite materials are increasingly widely used in the field of shipbuilding. In small and medium-sized ship hulls, cabin partitions, deck boards, doors, ladders, hatch covers, cable boxes and other parts.

[0003] In shipbuilding, the selection of building materials has a significant impact on important indicators such as ship performance and fuel consumption. During the operation of the ship, a large amount of waste and heat is generated, which requires an effective exhaust and heat dissipation system. Traditional ship chimneys are mostly made of steel or aluminum alloy, but steel is heavy, easy to corrode, and has high maintenance costs, while aluminum alloy has insufficient rigidity and is prone to deformation, which limits the improvement of ship performance and the improvement of environmental protection effect. Therefore, seeking a new type of lightweight, high-performance and easy-to-maintain ship chimney has become an industry demand.

[0004] Chinese patent CN103423756A discloses a composite chimney connecting node and method, mainly applied to the connection of composite chimneys in the power plant, metallurgy and other industries, belonging to the field of heavy corrosion protection. The composite chimney in the prior art is composed of a metal lining and an outer fiber cloth, and an epoxy resin adhesive layer is coated to form a composite material. The connecting node and method in the prior art are complex to operate and require high construction requirements. However, the prior art is a metal-non-metal composite, not a full non-metal composite material, which has the problem of being relatively heavy.

[0005] Chinese patent CN103085411A discloses a composite material pipe and its preparation method and application, which is suitable for the discharge of wet flue gas after flue gas desulfurization. The prior art has a multi-layer structure from the inside to the outside, which is formed by multiple layers of ethylene-based epoxy resin mortar, polyester surface felt, chopped felt, glass cloth and sprayed yarn to form a corrosion-resistant layer and a structural layer. However, the prior art has the problems of multiple construction processes, complex molding and difficult to guarantee the construction quality.

[0006] The above domestic invention patents are all applied to non-ship fields. In view of the characteristics of the ship field, the composite smokestack is required to meet the marine environment of large temperature difference, high humidity, and much salt mist, and is required to be light and high-strength to reduce weight and meet the bearing requirement. In addition, the general size of the ship smokestack component is large, and it is required to quickly form a large component to improve efficiency. Finally, the composite smokestack cabin needs to meet the requirements of installing doors, windows, equipment and the like, and the composite smokestack cabin and the metal main hull need to be reliably connected. The domestic patent invention is insufficient to realize the integrated application of such component systems, and the research on the composite smokestack system has not been reported so far. SUMMARY

[0007] Therefore, the present application aims to provide a composite smokestack to solve the problems of large weight, complex forming and difficult to guarantee construction quality of the composite smokestack in the prior art.

[0008] To achieve the above object, the technical scheme of the present application is as follows:

[0009] A composite smokestack, comprising a surrounding wall sandwich plate and a transverse wall plate, the surrounding wall sandwich plate surrounds the circumferential side wall of the smokestack, the transverse wall plate is arranged perpendicularly to the surrounding wall sandwich plate, the transverse wall plate and the surrounding wall sandwich plate are made of the same material, the connecting part of the transverse wall plate and the surrounding wall sandwich plate is connected through a connecting layer, a solid laminated plate is arranged on the surrounding wall sandwich plate, the solid laminated plate is connected with a door and window mounting flange, doors and windows are mounted on the surrounding wall sandwich plate through the door and window mounting flange and the solid laminated plate, a metal slot is arranged on the main hull deck, the surrounding wall sandwich plate is mounted in the metal slot to realize the fixed installation of the composite smokestack on the main hull deck.

[0010] Further, a metal knee plate is arranged at the lower part of the metal slot, and the lower part of the metal knee plate is connected obliquely to the main hull deck.

[0011] Further, the metal slot is arranged in a slot-shaped structure with an upper opening, the lower part of the surrounding wall sandwich plate has a thickness smaller than the thickness of the body of the surrounding wall sandwich plate, the lower part of the surrounding wall sandwich plate is inserted into the metal slot, and structural glue is further arranged in the metal slot, and the structural glue is wrapped around the tip of the lower part of the surrounding wall sandwich plate.

[0012] Further, the distance between the metal slot and the main hull is 150-300 mm, and the depth of the surrounding wall sandwich plate in the metal slot is 150-300 mm.

[0013] Further, the metal slot comprises an outer layer plate and an inner layer plate, the outer layer plate is arranged as a flat plate structure, and the outer layer plate is flush with the outer side of the surrounding wall sandwich panel, the inner layer plate is arranged on the inner side of the outer layer plate, and the inner layer plate is arranged as an L-shaped structure, and the lower outer side of the inner layer plate is connected with the outer layer plate.

[0014] Further, the connecting part of the transverse wall plate and the surrounding wall sandwich panel is connected by a hand lay-up connecting layer.

[0015] Further, the surrounding wall sandwich panel further comprises an upper sandwich panel and a lower sandwich panel, the upper sandwich panel and the lower sandwich panel are arranged on the inner and outer sides of the surrounding wall sandwich panel respectively, and the upper sandwich panel and the lower sandwich panel are both arranged as carbon fiber composite materials.

[0016] Further, the solid laminated plate is arranged as a structure with one thick end and one thin end, wherein the thick end of the solid laminated plate is flush with and connected with the surrounding wall sandwich panel, the outer side of the thin end of the solid laminated plate is flush with the outer side of the surrounding wall sandwich panel, the thin end of the solid laminated plate is connected with the door and window mounting flange, and the connecting part of the two forms a complementary structure, and the inner side and the outer side of the solid laminated plate after being connected with the door and window mounting flange both form flat wall surfaces.

[0017] Further, the surrounding wall sandwich panel is provided with transverse reinforcing ribs and longitudinal reinforcing ribs on the inner side, and the transverse reinforcing ribs and the longitudinal reinforcing ribs both protrude inwardly for increasing the mechanical strength of the wall plate.

[0018] Further, the raw material of the surrounding wall sandwich panel comprises carbon fiber and high-temperature-resistant foam core material.

[0019] Compared with the prior art, the composite chimney has the following advantages:

[0020] The application provides a composite chimney, which is made of carbon fiber reinforced high-temperature-resistant vinyl resin sandwich composite material, so that the weight of the chimney is greatly reduced, the overall weight of the ship is reduced, the sailing speed is improved and the energy utilization rate is improved. This is especially important for high-speed ships, and lightweight can reduce energy consumption and improve sailing speed; and has high strength and corrosion resistance, carbon fiber has high specific strength and high specific stiffness, and excellent corrosion resistance, the use of carbon fiber reinforced high-temperature-resistant vinyl resin sandwich composite material to manufacture the chimney improves the durability and safety of the chimney, prolongs the service life of the ship; the hand lay-up connection is used between the chimney wallboards, the construction is convenient, the operation is simple, the connection strength is controllable, and the defects such as pores and slag caused by welding connection and occupational hazards such as metal smoke, toxic gas and arc light radiation are avoided; the composite material-metal main ship body transition connection joint is used for connecting the chimney cabin and the metal main ship body, the adhesive connection is used, the construction is convenient and efficient, and the ship building efficiency is improved. The composite chimney of the application is suitable for vacuum assisted forming process, because the resin curing process of the vacuum assisted forming process is in the vacuum bag film sealing state, almost no harmful gas is generated, and the health of the operator is effectively protected. In addition, the composite chimney of the application can solve the problems of large weight, easy corrosion and high maintenance cost of the current ship metal chimney, and achieve the purpose of lightweight, high performance and easy maintenance of the ship chimney. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of the connection of the surrounding wall sandwich panel and the transverse wall panel of the application;

[0022] Figure 2 It is a structural schematic view of the door and window mounting flange on the surrounding wall sandwich panel of the application;

[0023] Figure 3 It is a schematic view of the connection of the chimney and the metal main ship body of the application;

[0024] Figure 4 It is a structural schematic view of the surrounding wall sandwich panel of the application;

[0025] Figure 5 It is a schematic view of the chimney cabin of the application.

[0026] BRIEF DESCRIPTION OF DRAWINGS:

[0027] 1-transverse wall panel, 2-connection layer, 3-surrounding wall sandwich panel, 4-sandwich panel upper panel, 5-sandwich panel lower panel, 6-solid laminated panel, 7-countersunk bolt, 8-door and window mounting flange, 9-adhesive, 10-wall panel transition corner, 11-metal slot, 111-outer panel, 112-inner panel, 12-structural adhesive, 13-metal knee plate, 14-main ship deck, 15-mounting connection area, 16-transverse reinforcing rib, 17-longitudinal reinforcing rib, 18-wall panel connection node Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 5 As shown, a composite material chimney includes a core panel 3 and a transverse wall panel 1. The transverse wall panel 1 and the core panel 3 are set at a certain angle. The core panel 3 forms the circumferential sidewall of the chimney, and the transverse wall panel 1 forms the radial wall panel of the chimney. Preferably, the transverse wall panel 1 and the core panel 3 are set perpendicularly, and the transverse wall panel 1 and the core panel 3 are made of the same material. The connection between the transverse wall panel 1 and the core panel 3 is connected by a connecting layer 2. A solid laminate 6 is provided on the core panel 3. The solid laminate 6 is connected to a door and window mounting flange 8. Doors and windows are installed on the core panel 3 through the door and window mounting flange 8 and the solid laminate 6. Correspondingly, a metal slot 11 is provided on the main hull deck 14. The core panel 3 is installed in the metal slot 11 to realize the fixed installation of the composite material chimney on the main hull deck 14.

[0030] A metal elbow plate 13 is provided at the lower part of the metal slot 11. The lower part of the metal elbow plate 13 is inclinedly connected to the main hull deck 14, so that the connection section of the lower part of the metal slot 11, the metal elbow plate 13 and the main hull deck 14 forms a triangular structure, which increases the fixing strength of the chimney. The main hull deck 14 is also made of metal.

[0031] Furthermore, the metal slot 11 is configured as a groove-shaped structure with an opening at the top. The lower thickness of the bulkhead sandwich panel 3 is less than the body thickness of the bulkhead sandwich panel 3. The lower tip of the bulkhead sandwich panel 3 is inserted into the metal slot 11. Structural adhesive 12 is also provided inside the metal slot 11, wrapping around the lower tip of the bulkhead sandwich panel 3. This allows the bulkhead sandwich panel 3 and the metal slot 11 to be bonded together with structural adhesive 12, increasing the bonding strength between the bulkhead sandwich panel 3 and the metal slot 11 and preventing breakage or damage at the joint. Furthermore, the distance between the metal slot 11 and the main hull is 150mm-300mm, and the depth of the bulkhead sandwich panel 3 in the metal slot 11 is 150mm-300mm.

[0032] Specifically, the metal slot 11 includes an outer plate 111 and an inner plate 112. The outer plate 111 is a flat plate and is flush with the outer side of the sandwich panel 3 of the wall, making the chimney's overall appearance neat. The inner plate 112 is located inside the outer plate 111 and is an L-shaped plate. The lower outer side of the inner plate 112 is connected to the outer plate 111, thereby forming a slot structure with an opening at the top.

[0033] Further, in order to avoid stress concentration, the overhanging corner 10 is arranged on the upper end of the metal slot 11, and the height of the overhanging corner 10 is 10mm-50mm. Specifically, the connecting part between the outer side of the wall sandwich panel 3 and the metal slot 11 is arranged in an inclined structure. The inclined structure is arranged in a form that the wall thickness of the wall sandwich panel 3 gradually increases from the position close to the opening of the slot 11, thereby forming the wall panel overhanging corner 10. The outer surface of the slot 11 and the outer side of the wall sandwich panel 3 form a flat wall surface through the application of structural glue at the wall panel overhanging corner 10, which increases the connecting strength of the wall sandwich panel 3 and the metal slot 11, prevents the sharp shearing force of the outer side of the top plate of the metal slot 11 on the wall sandwich panel 3, and further avoids the rupture of the wall sandwich panel 3 from the metal slot 11.

[0034] In the present embodiment, the hand lay-up connecting layer 2 is used to connect the transverse wall panel 1 and the wall sandwich panel 3 at the connecting part, which facilitates the assembly. Specifically, when a single wall sandwich panel 3 is assembled into a chimney cabin, 2-3 layers of carbon fiber twill fabric are used for hand lay-up connection, the hand lay-up uses high-temperature resistant resin, the connection length is 160-200mm, the layers are overlapped in a staggered manner, and the overlapping width is 15-20mm. The connection does not use metal connection such as bolts, and at the same time meets the requirements of load bearing performance and lightweight.

[0035] Further, the wall sandwich panel 3 further comprises a sandwich panel upper panel 4 and a sandwich panel lower panel 5, which are respectively arranged on the inner and outer sides of the sandwich panel 3. The sandwich panel upper panel 4 and the sandwich panel lower panel 5 are both made of carbon fiber composite material. Preferably, the carbon fiber composite material is 3mm thick.

[0036] The solid laminated panel 6 is arranged in a structure that one end is thick and the other end is relatively thin. The thicker end of the solid laminated panel 6 is the same thickness as the wall sandwich panel 3 and is connected to the wall sandwich panel 3. The outer side of the thinner end of the solid laminated panel 6 is flush with the outer side of the wall sandwich panel 3, thereby forming a recessed structure on the inner side of the solid laminated panel 6. Correspondingly, the thinner end of the solid laminated panel 6 is connected to the door and window mounting flange 8, and the connecting part of the two forms a complementary structure. The inner and outer sides of the two after connection both form a flat wall surface. The inner side herein refers to the inner wall of the chimney, and the outer side refers to the outer wall of the chimney. The solid laminated panel 6 is embedded between the sandwich panel upper panel 4 and the sandwich panel lower panel 5 of the wall sandwich panel 3 to meet the requirements of installing doors and windows, equipment, etc. of the chimney. The structure diagram is shown in Figure 2 When prepared, the prefabricated carbon fiber laminated panel 6 is butt-jointed with the core material of the composite material chimney wall sandwich panel 3, then the sandwich panel upper panel 4 is laid up, the skin fiber cloth of the sandwich panel upper panel 4 is wrapped around the edge of the prefabricated panel, and finally it is integrally injection molded. To meet the requirements of installing doors and windows, equipment, etc. of the chimney, the connection area length of the solid laminated panel 6 is 200mm-300mm, and the thickness is 8mm-10mm.

[0037] Further, bolt connecting pieces are arranged on the solid laminated board 6, which vertically pass through the thin end of the solid laminated board 6 and the thin end of the door and window mounting flange 8, connecting the two together, thereby realizing the installation of the door and window on the wall sandwich board 3 through the door and window mounting flange. Preferably, the bolt connecting pieces are arranged as countersunk bolts 7. The surfaces of the countersunk bolts 7, the connecting parts between the solid laminated board and the door and window mounting flange, and the connecting parts between the countersunk bolts and the solid laminated board and the door and window mounting flange are all smeared with adhesive 9, thereby increasing the bonding strength of the door and window mounting flange and simultaneously playing a sealing role. Moreover, the solid laminated board 6 forms a transition between the wall sandwich board 3 and the door and window mounting flange, and the mechanical strength of the solid laminated board 6 is relatively high, thereby avoiding the deformation or cracking of the wall sandwich board 3 caused by the excessive weight of the door and window. Further, M8-M12 countersunk bolts 7 are used to install and connect the door and window mounting flange 8, and the spacing between the countersunk bolts 7 is 150-200 mm.

[0038] In the embodiment, the adhesive 9 is a bulk putty. When preparing the bulk putty, the resin, white carbon black and accelerant are first stirred uniformly, and then the curing agent is finally added and stirred uniformly. The specific formula is determined after a gel test according to the on-site environment, and the basic ratio is resin: white carbon black: accelerant = 100: (1-2): (0.2-0.7), and the gel time is controlled to be 30 min ± 10 min.

[0039] Further, transverse reinforcing ribs 16 and longitudinal reinforcing ribs 17 are arranged on the inner side of the wall sandwich board 3, and the transverse reinforcing ribs 16 and the longitudinal reinforcing ribs 17 are both inwardly protruding and extending, for increasing the mechanical strength of the wall board. Preferably, reinforcing ribs are also arranged around the edges of the door and window of the wall sandwich board 3, and the reinforcing ribs form mounting and connecting areas 15 for the installation of the door and window, thereby further increasing the mechanical strength of the door and window installation position. Further, a plurality of reinforcing ribs are arranged near the mounting and connecting areas 15, such as a plurality of vertical reinforcing ribs arranged on the left and right sides of the mounting and connecting areas 15, and at least one transverse reinforcing rib 16 arranged on each of the upper and lower edges of the mounting and connecting areas 15, thereby further increasing the mechanical strength of the mounting and connecting areas.

[0040] In this embodiment, the raw material of the surrounding wall sandwich panel 3 includes carbon fiber and high-temperature-resistant foam core material. The carbon fiber mainly uses T700 domestic fiber fabric. Further, the carbon fiber raw material used by the surrounding wall sandwich panel 3 is treated with high-temperature-resistant flame-retardant epoxy vinyl ester resin and suitable sizing agent. The specific method is to immerse the yarn in the suitable sizing agent, uniformly infiltrate the yarn through the extrusion of the sizing roller, and then dry and wind. The suitable sizing agent improves the wear resistance and bundling of the yarn, reduces the loss during weaving, improves the infiltration ability of the carbon fiber surface by the resin, and improves the interface bonding ability with the resin. Preferably, the high-temperature-resistant flame-retardant epoxy vinyl ester resin has a high-temperature-resistant performance of ≥150°C and a glass transition temperature (Tg) of 180°C-190°C.

[0041] The foam core material includes but is not limited to poly (methyl methacrylimide) (PMI), polyvinyl chloride (PVC), poly (methyl methacrylimide) (PMI), polyethylene terephthalate (PET), polyurethane (PU), polyimide (PI), and other polymer foams. The reinforcing fiber fabric includes but is not limited to glass fiber, carbon fiber, carbon / glass hybrid fiber, quartz fiber, Kevlar fiber, ultra-high molecular weight polyethylene fiber, PBO fiber, and other fiber fabrics. The resin matrix includes but is not limited to unsaturated polyester resin, vinyl ester resin, epoxy resin, and compounded resin. Preferably, high-temperature-resistant PMI foam is used, and the density of the high-temperature-resistant PMI foam is 105-125 kg / m 3 The compressive strength is ≥2.5 MPa. The composite chimney surrounding wall sandwich panel 3 prepared from the above-mentioned carbon fiber, high-temperature-resistant vinyl resin, and high-temperature-resistant foam core material meets the requirements for the use of the composite chimney in a large temperature difference, high humidity, and salt fog-rich marine environment. The performance retention rate is ≥90% under the conditions of temperature impact, humid heat aging, salt fog aging, and other environments. At the same time, the use of the composite sandwich panel reduces the weight of the chimney, improves the rigidity, reduces the center of gravity of the ship, improves the sailing stability, and meets the requirements for the light weight of the ship.

[0042] As part of the embodiment of the present application, the solid laminated panel 6 is prepared from the above-mentioned carbon fiber and high-temperature-resistant vinyl resin. The solid laminated panel 6 meets the requirements for the mechanical bearing performance at room temperature: the tensile strength at room temperature is ≥800 MPa, the tensile modulus is ≥55 Gpa, the shear strength is ≥20 MPa, the high-temperature (120°C) shear strength is ≥20 MPa, and the mechanical performance retention rate is ≥90%. The solid laminated panel 6 meets the requirements for the use of the composite chimney in a large temperature difference, high humidity, and salt fog-rich marine environment: the performance retention rate is ≥90% under the conditions of wet bending performance, solar radiation, mold, temperature impact, humid heat aging, salt fog aging, and other environments.

[0043] The upper panel 4 and the lower panel 5 of the sandwich panel are symmetrical layers, and the orthogonal fabric and the 45° diagonal fabric are alternately laid. By using the designable characteristics of the composite material, the composite chimney wall sandwich panel 3 meeting different mechanical bearing performances can be prepared. Further, the forming process of the wall sandwich panel 3 is vacuum assisted resin infusion forming (VARI), which can realize rapid forming of large-size chimney wall panels, and at the same time, compared with the autoclave forming process, the cost is reduced.

[0044] The resin used in the wall sandwich panel 3 requires a room temperature viscosity of less than 600 mPa·s, and can be cured at room temperature after adding a corresponding curing agent and accelerator. The basic proportion of the resin is: resin: curing agent: accelerator = 100: (1-1.3): (0.3-0.5), and the amount of accelerator is changed to change the gel time to adapt to the on-site production. In order to ensure that the resin can be operated for 90-120 minutes under the on-site conditions during the resin pouring and curing process of the wall sandwich panel 3, a resin gel test is performed to determine the amount of accelerator. A portable hardness tester is used to test the apparent hardness, and the hardness is greater than or equal to 45. After the wall sandwich panel 3 is cured and demolded, high-temperature post-curing is required to increase the quality and strength of the composite chimney wall sandwich panel 3. The product is placed on a flat plate and vacuumized for post-curing, and the temperature curve is room temperature rising to 150°C at a rate of 20°C / 30min, and then kept at 150°C for 360min. After the product is naturally cooled, it is taken out.

[0045] As part of the embodiment of the present application, the forming process of the wall sandwich panel 3 includes but is not limited to typical composite material forming processes such as vacuum assisted resin infusion forming process (VARI), molding process, autoclave forming process, hand lay-up molding process, injection molding process, bag molding process, resin transfer molding process (RTM) and the like. The bolt connection used includes but is not limited to countersunk head bolts, locking bolts, rivets, self-tapping screws and other common fasteners.

[0046] The composite chimney of the present application is a fiber reinforced resin-based composite chimney with high strength, good toughness, corrosion resistance and light weight, which is prepared by using a vacuum assisted resin infusion molding process. The prepared composite chimney can withstand a maximum temperature of 150 DEG C. The carbon fiber used is mainly T700 fiber fabric, which is treated with epoxy vinyl sizing agent. The resin used is high-temperature resistant and flame-retardant epoxy vinyl ester resin. The core material is high-temperature resistant PMI foam. The performance retention rate of the composite chimney is ≥ 90% under the conditions of temperature impact, damp heat aging and salt spray aging, which meets the requirements of the composite chimney in the marine environment with large temperature difference, high humidity and salt spray. First, a single wall plate is prepared by using a vacuum assisted resin infusion molding process. A laminated plate preform is embedded in a sandwich plate to meet the installation requirements of chimney doors, windows and equipment. Then, when the chimney cabin is assembled, the wall plates are connected by using a hand lay-up process, and the hand lay-up resin is a high-temperature resistant resin. Finally, after the preparation of the composite chimney cabin is completed, the composite-metal main hull transition joint is installed on the ship body. Compared with the metal chimney, the weight of the composite chimney is greatly reduced, thereby reducing the overall weight of the ship, improving the ship speed and energy utilization rate. The composite chimney improves the durability and safety of the chimney and prolongs the service life of the ship. It can be widely applied to the molding and construction of composite chimneys in the field of ship and marine engineering, and has a wide application prospect.

[0047] Example 1

[0048] The present example demonstrates a method for manufacturing a composite chimney wall plate, which can be a transverse wall plate 1 and / or a surrounding wall sandwich plate, and the method mainly comprises the following steps:

[0049] (1) Foam processing and bonding of the composite chimney surrounding wall sandwich plate 3: the core material of the composite chimney surrounding wall sandwich plate 3 is PMI foam core material, and a flow channel groove is opened in the length direction of the single side; the foam processing and splicing are performed according to the size requirements. First, the pre-splicing of the core material is completed, and the size and processing are confirmed to be correct before the subsequent bonding is performed. The adhesive 9 is a body putty, and the gel time is controlled within 30 min ± 10 min. When preparing the body putty, the resin, white carbon black and accelerant should be stirred uniformly first, and then the curing agent is added and stirred uniformly. After curing, the excess putty on the surface of the core material of the composite chimney surrounding wall sandwich plate 3 is polished clean, and the floating dust is cleaned with acetone.

[0050] (2) Cutting and bonding of the transverse reinforcing rib 16 and the longitudinal reinforcing rib 17: the reinforcing rib is cut according to the size requirements (the longitudinal reinforcing rib 17 is kept intact, and the transverse reinforcing rib 16 is spliced). After cutting and cleaning, the transverse reinforcing rib 16 and the longitudinal reinforcing rib 17 are bonded. Then, the arc transition foam strips are bonded on both sides of the reinforcing rib with the adhesive 9.

[0051] (3) Mold and tool cleaning: check the surface of the mold and tool to ensure that the surface is clean, dry and free of water, and clean the surface of the mold and tool with a cleaning agent; after cleaning, apply a hole sealing agent to the surface of the mold. Then apply the mold release agent evenly on the surface of the mold for 5-6 times.

[0052] (4) Laying of the lower panel 5 of the sandwich panel: The lower panel 5 of the sandwich panel is made of 3mm carbon fiber composite material. The fiber laying requires that the fabric layer be flat and free of obvious wrinkles to ensure the overall appearance quality of the product.

[0053] (5) Laying of the core material of the composite chimney surrounding wall sandwich panel 3: After the lower panel is laid, the foam core material of the sandwich panel is laid. After the foam core material is positioned, it is placed on the lower panel. After the core material is laid, the upper panel laying begins.

[0054] (6) Laying of the upper panel 4 of the sandwich panel: The upper panel 4 of the sandwich panel is made of 3mm carbon fiber composite material, and the fabric of the lower panel 4 of the sandwich panel is required to be flush with the core material of the composite chimney surrounding wall sandwich panel 3.

[0055] (7) Laying of the transverse reinforcing rib 16, longitudinal reinforcing rib 17 and skin: The transverse reinforcing rib 16 and longitudinal reinforcing rib 17 are placed on the fabric of the upper panel 5 of the sandwich panel after being bonded. After the transverse reinforcing rib 16 and longitudinal reinforcing rib 17 are laid, the skin laying is performed.

[0056] (8) Pipeline laying and resin infusion

[0057] The release cloth and flow guide cloth are laid in turn, the glue injection pipe and vacuum pipe are set, the resin gel test is performed under the injection site environment, the resin operation time is 180min±20min, and the resin ratio is: resin: curing agent: accelerator = 100:1.3:0.5; after the air tightness test is qualified, resin infusion is started. After infusion is completed, the glue is sealed in time, the pipeline is closed, and the vacuum pressure is continuously maintained until curing.

[0058] (9) Curing, demolding and post-curing treatment: The apparent hardness of the product is tested after curing for 36h, and demolding can be performed when the surface hardness exceeds 45. After the product is demolded, post-curing is performed. The product is placed on a flat plate and vacuumized for post-curing, and the temperature curve is room temperature rising to 150°C at a rate of 20°C / 30min, then holding at 150°C for 360min, and then taking out after the product is naturally cooled, completing the product manufacturing.

[0059] Example 2

[0060] This example demonstrates a method for manufacturing a composite material chimney cabin, as shown in Figure 5 The manufacturing process of the composite material chimney wall panel is specifically described in Example 1. The connection between the composite material chimney wall panels is achieved by hand lay-up, which is specifically described in Figure 1The connecting part of the transverse wall plate 1 and the wall plate 3 is connected by a hand lay-up connecting layer, and the wall plate connecting point 18 of the wall plate 3 and the adjacent wall plate 3 is also connected by a hand lay-up connecting layer. The door and window accessory mounting connection is specifically described as follows Figure 2 The connection with the metal main hull is specifically described as follows Figure 3 Thus, a cylindrical chimney cabin is formed.

[0061] Although the present application is disclosed as above, it is not limited to the above. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, and therefore the protection scope of the present application should be limited by the scope defined in the claims.

Claims

1. A composite chimney, characterized in that, The application relates to a composite chimney, which comprises a surrounding wall sandwich plate (3) and a transverse wall plate (1), the raw material of the surrounding wall sandwich plate (3) comprises carbon fibers and a high-temperature-resistant foam core material, the surrounding wall sandwich plate (3) surrounds the circumferential side wall of a chimney, the transverse wall plate (1) is arranged perpendicularly to the surrounding wall sandwich plate (3), the connecting position of the transverse wall plate (1) and the surrounding wall sandwich plate (3) is connected through a hand lay-up connecting layer (2), a solid laminated plate (6) is arranged on the surrounding wall sandwich plate (3), the solid laminated plate (6) is connected with a door and window mounting flange (8), the door and window are mounted on the surrounding wall sandwich plate (3) through the door and window mounting flange (8) and the solid laminated plate (6), a metal slot (11) is arranged on a main hull deck (14), the surrounding wall sandwich plate (3) is mounted in the metal slot (11), and the composite chimney is fixedly mounted on the main hull deck (14). The metal slot (11) is arranged in a groove-shaped structure with an upper opening, the lower thickness of the surrounding wall sandwich plate (3) is smaller than the body thickness of the surrounding wall sandwich plate (3), the lower part of the surrounding wall sandwich plate (3) is inserted into the metal slot (11), a structural adhesive (12) is further arranged in the metal slot (11), the structural adhesive (12) is wrapped around the lower tip of the surrounding wall sandwich plate (3), the metal slot (11) comprises an outer layer plate (111) and an inner layer plate (112), the outer layer plate (111) is arranged in a flat plate structure, the outer layer plate (111) is flush with the outer side of the surrounding wall sandwich plate (3), and the inner layer plate (112) is arranged on the inner side of the outer layer plate (111) and is arranged in an L-shaped structure, and the lower outer side of the inner layer plate (112) is connected with the outer layer plate (111). The solid laminated plate (6) is arranged in a structure with one thick end and one thin end, the thick end of the solid laminated plate (6) is equal in thickness to the surrounding wall sandwich plate (3) and is connected with the surrounding wall sandwich plate (3), the outer side of the thin end of the solid laminated plate (6) is flush with the outer side of the surrounding wall sandwich plate (3), the thin end of the solid laminated plate (6) is connected with the door and window mounting flange (8), and the connecting position of the two forms a complementary structure, and the inner side and the outer side of the solid laminated plate (6) connected with the door and window mounting flange (8) both form flat wall surfaces.

2. The composite chimney according to claim 1, characterized in that, A metal knee plate (13) is arranged at the lower part of the metal slot (11), and the lower part of the metal knee plate (13) is obliquely connected with the main hull deck (14).

3. The composite chimney of claim 1, wherein The distance between the metal slot (11) and the main hull is 150mm-300mm, and the depth of the surrounding wall sandwich plate (3) in the metal slot (11) is 150mm-300mm.

4. The composite chimney of claim 1, wherein The surrounding wall sandwich plate (3) further comprises an upper sandwich plate panel (4) and a lower sandwich plate panel (5), the upper sandwich plate panel (4) and the lower sandwich plate panel (5) are respectively arranged on the inner and outer sides of the surrounding wall sandwich plate (3), and the upper sandwich plate panel (4) and the lower sandwich plate panel (5) are both arranged in carbon fiber composite materials.

5. The composite chimney of claim 1, wherein The lateral reinforcing ribs (16) and the longitudinal reinforcing ribs (17) are both extended to the inner side, for increasing the mechanical strength of the wallboard.

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