Composite material annular fixed hard curtain and manufacturing method thereof

Abstract

The invention provides a composite material annular fixed hard curtain and a manufacturing method thereof, and belongs to the technical field of material forming. The problems that the process is complex, the product weight is large, conveying and mounting are difficult, durability is low, corrosion resistance is poor, and maintenance cost is high are solved. The hard curtain comprises a hard curtain main body, a metal base, a supporting truss and a quick connecting device, the hard curtain main body is arc-shaped, the back of the hard curtain main body is connected with the supporting truss, the bottom of the hard curtain main body is connected with the metal base, the bottom of the supporting truss is connected with the metal base, and the hard curtain main body comprises a plurality of equal-area cambered composite material sections; the composite material sections are connected through peripheral flanges and quick connecting devices, the supporting truss comprises a plurality of composite material rectangular pipes and a plurality of metal joints, and every two composite material rectangular pipes are connected through a metal joint. The device is mainly used for installing and manufacturing the annular fixed hard curtain.

Description

Technical Field

[0001] The invention belongs to the technical field of material forming, and in particular relates to a composite material annular fixed hard curtain and a manufacturing method thereof. Background Art

[0002] The annular fixed hard screen usually has a curved shape with a large curvature. The annular fixed hard screen is usually used to create a complete virtual reality environment, creating an immersive effect, so that participants are in a new world of visual images. The annular fixed hard screen is mainly used for indoor displays, outdoor displays, control rooms and strategic centers, and can be used to monitor, simulate, coordinate and manage a large number of complex tasks and data. For example, in large exhibitions, the annular fixed hard screen is often used to present panoramic maps, virtual reality and multimedia educational presentations. It has a wide range of application scenarios, including indoor: science and technology museums, observatories, earthquake bureaus, space bureaus, schools, museums, exhibition halls and other places; outdoor: tourist attractions, playgrounds, outdoor exhibition halls, etc.

[0003] In the prior art, the annular fixed hard screen usually adopts a metal screen. The metal annular fixed hard screen is divided into two types: a metal hard screen and a metal soft screen. The projection screen of this material has the characteristics of salt spray resistance, corrosion resistance and pollution resistance. The picture effect of the metal hard screen is better than that of the soft screen. However, the annular fixed hard screen in the prior art is usually a whole piece of metal hard screen, which cannot be curled or deformed. It needs to be installed on the wall with a bracket, and the bracket cannot be adjusted or decomposed. The annular fixed hard screen is usually a whole, which can neither be partially repaired nor partially replaced. Once it is damaged, the entire screen can only be replaced. This design makes the hard screen more stable during installation and use, but the manufacturing process is complicated, the product weight is large, transportation and installation are difficult, the durability is low, the corrosion resistance is poor, and the maintenance cost is high. Summary of the invention

[0004] In view of this, the present invention aims to propose a composite material annular fixed hard curtain and a manufacturing method thereof to solve the problems of complex process, heavy product weight, difficult transportation and installation, low durability, poor corrosion resistance and high maintenance cost.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a composite annular fixed hard curtain, which includes a ring curtain body, a metal base and a supporting truss, wherein the ring curtain body is arc-shaped, the back of the ring curtain body is connected to the supporting truss, the bottom of the ring curtain body is connected to the metal base, and the bottom of the supporting truss is connected to the metal base, the ring curtain body includes a plurality of composite petals with equal areas and arcs, and the plurality of composite petals are connected by flanges around and quick connection devices, the supporting truss includes a plurality of composite rectangular tubes and a plurality of metal joints, and every two composite rectangular tubes are connected by metal joints, the composite petals and the composite rectangular tubes are both made of resin-based-fiber composite materials, and the curved surface area of ​​the composite petals is less than or equal to 1.2m 2 , weight is less than or equal to 15Kg.

[0006] Furthermore, the back of the annular curtain body is connected to the supporting truss by bolts, the bottom of the annular curtain body is connected to the metal base by bolts, metal embedded parts are arranged in the composite rectangular tube, and the supporting truss is connected to the metal base through the metal embedded parts arranged in the composite rectangular tube.

[0007] Furthermore, the metal base is formed by welding a metal tube and a metal plate, and the metal base is an arc-shaped structure.

[0008] Furthermore, the surrounding flange is arranged around the outer side of the composite material petal, and the quick connection device includes a locking body and a cam sleeve, the locking body is arranged on one side of the surrounding flange, and the cam sleeve is arranged on the other side of the surrounding flange, and the locking body and the cam sleeve are connected in a cooperative manner.

[0009] Furthermore, the composite material is divided into epoxy resin-fiber composite materials, and the fiber is any one of glass fiber and carbon fiber.

[0010] Furthermore, resin is applied to gaps between the plurality of composite material petals, resin is applied to mounting surfaces of the plurality of composite material rectangular tubes, and resin is applied to the locations where the support truss and the metal base are connected via bolts.

[0011] A method for manufacturing a composite material annular fixed hard curtain comprises the following steps:

[0012] S1: manufacturing composite material petals, wherein the composite material petals are formed by placing prepreg on a forming mold using an integrated forming technology;

[0013] S2: manufacturing a composite rectangular tube, wherein the composite rectangular tube is formed by pultrusion;

[0014] S3: The composite material is split into four parts with flanges installed around them, and quick-connect devices are installed on both sides of the flanges;

[0015] S4: installing metal embedded parts in the composite rectangular tube, and connecting the composite rectangular tube through metal joints and bolts to form a supporting truss;

[0016] S5: Connect the supporting truss to the metal base through the metal embedded parts in the composite rectangular tube;

[0017] S6: Connecting a plurality of composite material petals to the supporting truss by bolts in order from low to high, and connecting the plurality of composite material petals by flanges and quick connection devices around to form a ring curtain body;

[0018] S7: Connect the bottom of the ring screen body to the metal base with bolts, lock the quick connection device, and complete the installation.

[0019] Furthermore, a method for manufacturing a composite annular fixed hard curtain, wherein the molding mold is used for processing composite petals, the molding mold comprises a mold cover and a bottom film, the bottom of the mold cover is arc-shaped, the upper part of the bottom film is arc-shaped, and the arc of the bottom of the mold cover corresponds to the arc of the upper part of the bottom film, S1 specifically comprises the following steps:

[0020] S11: evenly apply a release agent on the surface of the molding mold, and spread the prepreg on the upper surface of the base film so that the prepreg is completely attached to the surface of the molding mold;

[0021] S12: After the prepreg is laid, trim the excess part, place the mold cover on the prepreg and the base film, and use a hot press to apply pressure on the top of the mold cover. Keep the pressure until the product is cured and formed, and demold after forming;

[0022] S13: After demoulding, the surface of the blank is polished smooth and sprayed with paint.

[0023] A method for manufacturing a composite material annular fixed hard curtain, S2 specifically comprises the following steps:

[0024] S21: preheating the pultrusion machine, fixing the yarn guide plate, preforming plate, glue injection box, scraper plate and rectangular tube forming mold on the pultrusion machine operating table in sequence, installing the fiber bundle yarn on the yarn rack, pulling out the sand head, and evenly inserting it into the hole of the yarn guide plate;

[0025] S22: preparing and stirring the glue solution, and pouring the stirred glue solution into the glue injection box to allow the glue solution to soak the fiber bundle yarn;

[0026] S23: Setting the temperature of the rectangular tube forming mold, then heating the mold, and starting the pultrusion machine and the traction device after reaching a predetermined temperature;

[0027] S24: The fiber bundle yarn passes through the hole of the yarn guide plate, and then passes through the preformed plate, the glue injection box, the scraper plate and the rectangular forming mold in sequence, so as to obtain a composite rectangular tube.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the present invention, the composite annular fixed hard curtain has a simple structure, the annular curtain body is connected by equal-area petals, the petals are molded, no secondary processing is required, the molding process is simple, and the problem of complex processing technology of annular fixed hard curtain in the prior art is solved;

[0030] 2. In the present invention, the petals of the ring curtain body are made of resin-based-fiber composite materials, wherein the resin base is made of heat-resistant epoxy resin, which improves the corrosion resistance of the ring curtain body and is suitable for indoor, outdoor and various complex environments. The temperature range can be between -55°C and +70°C, and it can be used outdoors for a long time. The surface of the ring curtain body does not need to use anti-corrosion coating, which reduces the maintenance cost during use and later, and solves the problems of high cost, low durability and poor corrosion resistance of the annular fixed hard curtain in the prior art;

[0031] 3. The main body of the ring curtain in the present invention is connected to each other by petals of equal area to form a whole. The weight of a single petal is less than 15K15. The supporting trusses are connected by composite materials and metal joints. The connection method is adhesive and screw connection. The on-site construction process is simple, which can effectively reduce the difficulty of operation, reduce the number of operators and construction time, and reduce labor and equipment costs, solving the problem of inconvenient transportation of the existing ring-shaped fixed hard curtain;

[0032] 4. The composite rectangular tubes in the ring curtain body and the supporting trusses of the present invention are all made of resin-based fiber composite materials. Different fiber materials can be selected to meet different requirements of the product on weight, strength, cost, etc. By selecting resin-based fiber composite materials, the overall weight of the ring-shaped fixed hard curtain is reduced and can meet the use requirements;

[0033] 5. The annular fixed hard curtain in the present invention adopts a split structure, which can be quickly installed and fixed on site, saving installation time. The cost of materials, installation, transportation and after-sales maintenance is much lower than that of metal structure hard curtain, thus achieving cost reduction and efficiency improvement;

[0034] 6. The annular fixed hard curtain of the present invention can be manufactured according to different sizes, indoor or outdoor usage scenarios and installation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 This is a schematic diagram of the axial structure of a composite material annular fixed hard curtain according to the present invention;

[0037] Figure 2 This is a schematic diagram of the back structure of a composite material annular fixed hard curtain according to the present invention;

[0038] Figure 3 This is a schematic diagram of the front structure of a composite material annular fixed hard curtain according to the present invention;

[0039] Figure 4 It is a schematic diagram of the connection structure between the composite material petals and the supporting trusses of a composite material annular fixed hard curtain according to the present invention;

[0040] Figure 5 It is a schematic diagram of the partial structure of the connection between several composite material petals of a composite material annular fixed hard curtain according to the present invention;

[0041] Figure 6 It is a partial structural schematic diagram of the connection between the composite material petals and the supporting trusses of a composite material annular fixed hard curtain according to the present invention;

[0042] Figure 7 It is a partial structural schematic diagram of the connection between the supporting truss and the metal base of a composite material annular fixed hard curtain according to the present invention;

[0043] Figure 8 It is an exploded view of a composite material petal forming mold of a composite material annular fixed hard curtain according to the present invention;

[0044] Fig. 9 It is a schematic structural diagram of a composite material rectangular tube of a composite material annular fixed hard curtain formed by a pultrusion process according to the present invention;

[0045] Fig.10 The present invention is a manufacturing flow chart of a composite material annular fixed hard curtain.

[0046] In the figure:

[0047] 1. Composite material petals; 2. Support trusses; 3. Metal base; 4. Metal joints; 5. Locking device body; 6. Cam sleeve; 7. Metal embedded parts; 8. Flanges around; 9. Mold cover; 10. Bottom film; 11. Yarn guide plate; 12. Preformed plate; 13. Glue-assisting box; 14. Glue scraping plate; 15. Composite material rectangular tube forming mold. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0049] See also Figure 1-6 The present embodiment is described, a composite annular fixed hard curtain, which includes a curtain ring body, a metal base 3 and a support truss 2, wherein the curtain ring body is arc-shaped, and the arc of the curtain ring body is formed by connecting a plurality of composite material petals 1 each with an arc, the back of the curtain ring body is connected to the support truss 2, and the support truss 2 is used to support the curtain ring body to keep it vertical, the bottom of the curtain ring body is connected to the metal base 3, and the bottom of the support truss 2 is connected to the metal base 3, and the metal base 3 is used to ensure structural stability, the curtain ring body includes a plurality of composite material petals 1 with equal areas and an arc, and a plurality of composite material petals 1 are connected to the metal base 3, and the metal base 3 is used to ensure structural stability, The petals 1 are connected by flanges 8 around them and quick connection devices. The flanges 8 around them are arranged around the composite petals 1 and are used to connect two composite petals 1. The support truss 2 includes a plurality of composite rectangular tubes and a plurality of metal joints 4. Every two composite rectangular tubes are connected by metal joints 4. The joints are reinforced by screw connection and adhesive bonding. The composite petals and composite rectangular tubes are both made of resin-based fiber composite materials. The overall weight of the annular fixed hard curtain is reduced by selecting resin-based fiber composite materials. The curved surface area of ​​the composite petal 1 is less than or equal to 1.2m 2 , the weight is less than or equal to 15Kg. By decomposing the main body of the ring curtain into composite petals 1, the ring-shaped fixed hard curtain is easier to transport, solving the problem of occupying a large space during transportation.

[0050] In the present invention, a plurality of composite material petals 1 of equal area are used to form an annular curtain body through a surrounding flange 8 and a quick connection device. The surrounding flange 8 is embedded in the composite material petal 1. The quick connection device is connected to the surrounding flange 8 to connect the two composite material petals 1. The surrounding flange 8 is used to provide a connection and fixing surface for the quick connection device. The support truss 2 is formed by splicing a plurality of composite material rectangular tubes through a metal joint 4, and is reinforced at the connection with screws and adhesive. The support truss 2 is used to support and install an annular fixed hard curtain. The back of the annular curtain body is connected to the support truss 2, and the bottom of the annular curtain body is connected to the metal base 3. The bottom of the support truss 2 is connected to the metal base 3. The metal base 3 is welded by a metal tube and a metal plate, and its shape can be designed according to the shape of the annular curtain body. When the size of the metal base 3 is small, the stability of the structure can be improved by adding a counterweight to the base, and an annular fixed hard curtain is formed by the above connection.

[0051] The back of the annular curtain body is connected to the support truss 2 by bolts, and the bottom of the annular curtain body is connected to the metal base 3 by bolts. A metal embedded part 7 is arranged in the composite rectangular tube. The support truss 2 is connected to the metal base 3 through the metal embedded part 7 arranged in the composite rectangular tube. The metal embedded part 7 is used to fix the connection between the support truss 2 and the metal base 3.

[0052] The metal base 3 is formed by welding a metal tube and a metal plate. The metal base 3 is an arc-shaped structure. The curvature of the metal base 3 is designed according to the ring curtain body. The metal base 3 adopts a split structure, which is convenient for quick installation on site. When the size of the ring curtain body is small, a counterweight can be added to the metal base 3 at the bottom of the corresponding ring curtain body, thereby improving the stability of the annular tube fixing hard curtain.

[0053] The surrounding flange 8 is arranged around the outer side of the composite material petal 1, and the surrounding flange 8 provides a connection and fixing surface for the composite material petal 1 during the connection process. The quick connection device includes a locking body 5 and a cam sleeve 6. The locking body 5 is arranged on one side of the surrounding flange 8, and the cam sleeve 6 is arranged on the other side of the surrounding flange 8. The locking body 5 and the cam sleeve 6 are connected in cooperation, and the quick connection device can be locked. By locking the quick connection device, the connection between the two composite material petals 1 can be made more stable and the gap between each two composite material petals 1 can be reduced.

[0054] The composite material petal 1 is an epoxy resin-fiber composite material, and the fiber material is any one of glass fiber and carbon fiber. The ring curtain body adopts epoxy-fiber composite material to effectively solve the problems of complex manufacturing process, heavy weight and high maintenance cost of existing metal hard curtains.

[0055] The resin in the composite rectangular tube is any one of epoxy resin, polyurethane resin, and vinyl resin, and the fiber is any one of glass fiber, carbon fiber, and basalt fiber. The support truss 2 uses a resin-fiber composite material to effectively solve the problems of heavy weight, difficult transportation, and inconvenient installation of existing metal hard curtains.

[0056] The gaps between the composite petals 1 are coated with resin, and the surface of the ring screen body is smoother by coating the resin in the gaps at the joints of the composite petals 1, which is convenient for imaging. The mounting surfaces of the composite rectangular tubes are coated with resin, so that the connection between the composite rectangular tubes is more stable. The support truss 2 and the metal base 3 are connected by bolts and coated with resin, so that the connection between the support truss 2 and the metal base 3 is more tightly connected. The resin is a room temperature curing resin, which refers to a resin material that can undergo a curing reaction at room temperature. This type of resin material does not require external heating, and can complete the curing process only at room temperature, thereby forming a hard solid material.

[0057] The composite annular hard curtain described in the present invention comprises an annular curtain body, a supporting truss 2 and a metal base 3. The annular curtain body is composed of a plurality of composite petals 1 with arcs, the supporting truss 2 is composed of a plurality of composite rectangular tubes spliced ​​together by metal joints 4 and screws, and the metal base 3 is formed by welding a metal tube and a metal plate. The problem of inconvenient transportation and difficult maintenance of the metal hard curtain in the prior art is solved by separating the annular curtain body, the supporting truss 2 and the metal base 3. The composite petals 1 and the composite rectangular tubes are both made of resin-fiber composite materials. The resin-fiber composite materials have the advantages of high strength, high rigidity, high temperature resistance, corrosion resistance, light weight, strong designability and good processing performance. The annular fixed hard curtain made of the resin-fiber composite material can be used in a variety of complex scenes indoors or outdoors.

[0058] See also Figure 1-10 The present embodiment describes a method for manufacturing a composite material annular fixed hard curtain, which specifically includes the following steps:

[0059] S1: manufacturing a composite material petal 1, wherein the composite material petal 1 is formed by laying a fiber-resin prepreg on a forming mold, demoulding after forming, and polishing the surface of the blank smooth after demoulding, and the fiber-resin prepreg laying technology is used to improve production efficiency and reduce costs, while improving product quality and reliability;

[0060] S2: manufacturing a composite rectangular tube, wherein the composite rectangular tube is formed by a pultrusion process, and the pultrusion process can realize automatic control. The pultrusion process can effectively improve the production efficiency of the composite rectangular tube, and can meet the needs of large-scale composite rectangular tube production. In addition, the pultrusion process generates less waste during the production process, so the production cost can be reduced. The composite rectangular tube produced by the pultrusion process does not require subsequent processing, thereby saving raw materials and energy;

[0061] S3: installing flanges 8 around the composite material petals 1, installing quick connection devices on both sides of the flanges 8, and connecting a plurality of composite material petals 1 into a ring curtain body through the flanges 8 around the composite material petals 1 and the quick connection devices;

[0062] S4: installing metal embedded parts 7 in the composite rectangular tube, connecting several composite rectangular tubes through metal joints 4 and bolts to form a support truss 2, and applying room temperature fast curing resin on the connecting surface of every two composite rectangular tubes for reinforcement;

[0063] S5: Connect the support truss 2 and the metal base 3 through the metal embedded parts 7 in the composite rectangular tube, and apply a room temperature fast curing resin at the connection between the support truss 2 and the metal base 3 to further ensure that the support truss 2 and the metal base 3 are firmly connected;

[0064] S6: Connecting a plurality of composite petals 1 to the supporting truss 2 by bolts in order from low to high, the plurality of composite petals 1 are connected by flanges 8 and quick connection devices around to form a ring curtain body, and applying a room temperature quick curing resin to the gap between every two composite petals 1, so as to ensure a firm connection between every two composite petals 1 and keep the surface of the ring curtain body smooth and flat;

[0065] S7: Connect the bottom of the ring curtain body to the metal base 3 through bolts, lock the quick connection device between the composite material petals 1, and complete the installation.

[0066] The composite material petals 1 and the composite material rectangular tubes have a simple molding process, do not require secondary processing, and have low cost, thereby solving the problem of complex manufacturing process and high cost of the metal hard curtain in the prior art; the plurality of composite material petals 1 are connected by a quick connection device and surrounding flanges 8 to form a ring curtain body, the back of the ring curtain body is connected to the support truss 2 by bolts, and the bottom of the ring curtain body is connected to the metal base 3 by bolts, and the composite material rectangular tubes are connected by metal joints 4 and screws to form the support truss 2, which can realize rapid on-site installation and fixation, save production and installation time, and solve the problem of difficult installation of the existing metal hard curtain.

[0067] See also Figure 8 In this embodiment, the molding die is used to process the composite material petal 1. The molding die includes a mold cover 9 and a bottom film 10. The bottom of the mold cover 9 is arc-shaped, and the top of the bottom film 10 is arc-shaped. The arc at the bottom of the mold cover 9 corresponds to the arc at the top of the bottom film 10. S1 specifically includes the following steps:

[0068] S11: evenly apply a release agent on the surface of the molding die, cut the prepreg according to the structure of the composite material petal 1, and lay the prepreg on the upper surface of the base film 10, using a specific laying angle of 0°, 90°, 45°, -45° and laying the prepreg alternately in a certain order, so that the prepreg is completely attached to the surface of the molding die and the bubbles between the prepreg layers are driven out, ensuring that the prepreg is firmly attached to the surface of the base film b;

[0069] S12: After the prepreg is laid, the excess part is trimmed, the mold cover 9 is placed on the prepreg and the base film 10, and a hot press is used to apply pressure to the upper part of the mold cover 9, and the epoxy resin is cured according to the curing system, that is, the pressurized state is maintained until the product is cured and formed, and demolding is performed after forming;

[0070] S13: After demoulding, remove excess materials, burrs and burrs, polish the surface of the blank to make it smooth, and finally spray the paint.

[0071] See also Fig. 9 In this embodiment, the manufacturing method of the composite material annular fixed hard curtain, S2 specifically includes the following steps:

[0072] S21: preheat the pultrusion machine for 2-3 hours within a temperature range of ±2°C, fix the yarn guide plate 11, the preformed plate 12, the glue injection box 13, the scraper plate 14 and the rectangular tube forming mold 15 on the pultrusion machine operating table in sequence, install the fiber bundle yarn on the yarn rack, extract the sand head, and evenly insert it into the hole of the yarn guide plate 11;

[0073] S22: Prepare glue and stir, weigh the resin, curing agent, accelerator, inner film agent and filler in proportion, stir evenly with a stirrer, and the stirring time is not less than 20 minutes. The amount of glue is set according to the size of the composite rectangular tube, and the stirred glue is poured into the glue injection box 13 to fully infiltrate the fiber bundle yarn;

[0074] S23: Setting the temperature of the rectangular tube forming mold 15, sequentially setting the temperature of the front area, the middle area and the rear area of ​​the rectangular tube forming mold 15, and then heating the mold, and starting the pultrusion machine and the traction device after reaching a predetermined temperature;

[0075] S24: The fiber bundle yarn passes through the hole of the yarn guide plate 11, and then passes through the preformed plate 12, the glue injection box 13, the scraper plate 14 and the rectangular forming mold 15 in sequence, so as to obtain a composite rectangular tube. The composite rectangular tube after molding is inspected, and a smooth surface without defects is a qualified product.

[0076] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A composite material annular fixed hard curtain, characterized in that: The invention comprises a ring curtain body, a metal base (3) and a supporting truss (2). The ring curtain body is arc-shaped. The back of the ring curtain body is connected to the supporting truss (2). The bottom of the ring curtain body is connected to the metal base (3). The bottom of the supporting truss (2) is connected to the metal base (3). The ring curtain body comprises a plurality of composite material petals (1) with equal areas and arcs. The plurality of composite material petals (1) are connected by flanges (8) and quick connection devices around them. The supporting truss (2) comprises a plurality of composite material rectangular tubes and a plurality of metal joints (4). Every two composite material rectangular tubes are connected by metal joints (4). The composite material petals (1) and the composite material rectangular tubes are both made of resin-based fiber composite materials. The curved surface area of ​​the composite material petals (1) is less than or equal to 1.2 m 2 , weight is less than or equal to 15Kg.

2. A composite material annular fixed hard curtain according to claim 1, characterized in that: The back of the annular curtain body is connected to the support truss (2) through bolts, the bottom of the annular curtain body is connected to the metal base (3) through bolts, a metal embedded part (7) is arranged in the composite rectangular tube, and the support truss (2) is connected to the metal base (3) through the metal embedded part (7) arranged in the composite rectangular tube.

3. The composite material annular fixed hard curtain according to claim 1, characterized in that: The metal base (3) is formed by welding a metal tube and a metal plate, and the metal base (3) is an arc-shaped structure.

4. The composite material annular fixed hard curtain according to claim 1, characterized in that: The surrounding flange (8) is arranged around the outside of the composite material petal (1), and the quick connection device includes a locking body (5) and a cam sleeve (6), wherein the locking body (5) is arranged on one side of the surrounding flange (8), and the cam sleeve (6) is arranged on the other side of the surrounding flange (8), and the locking body (5) and the cam sleeve (6) are connected in a cooperative manner.

5. The composite material annular fixed hard curtain according to claim 1, characterized in that: The composite material petal (1) is an epoxy resin-fiber composite material, and the fiber is any one of glass fiber and carbon fiber.

6. The composite material annular fixed hard curtain according to claim 1, characterized in that: The resin in the composite rectangular tube is any one of epoxy resin, polyurethane resin and vinyl resin, and the fiber is any one of glass fiber, carbon fiber and basalt fiber.

7. A composite material annular fixed hard curtain according to claim 1, characterized in that: The gaps between the plurality of composite material petals (1) are coated with resin, the mounting surfaces of the plurality of composite material rectangular tubes are coated with resin, and the connection between the support truss (2) and the metal base (3) via bolts is coated with resin.

8. A method for manufacturing a composite material annular fixed hard curtain as claimed in claim 1, characterized in that: The specific steps include: S1: manufacturing a composite material petal (1), wherein the composite material petal (1) is formed by placing a prepreg on a forming mold using an integrated forming technology; S2: manufacturing a composite rectangular tube, wherein the composite rectangular tube is formed by pultrusion; S3: A flange (8) is installed around the composite material petal (1), and locking devices are installed on both sides of the flange (8); S4: installing a metal embedded part (7) in the composite rectangular tube, and connecting the composite rectangular tube through a metal joint (4) and bolts to form a supporting truss (2); S5: Connecting the support truss (2) to the metal base (3) through the metal embedded parts (7) in the composite rectangular tube; S6: Connecting a plurality of composite material petals (1) to the supporting truss (2) by means of bolts in an ascending order, wherein the plurality of composite material petals (1) are connected by means of flanges (8) and quick connection devices around the periphery to form a ring curtain body; S7: Connect the bottom of the ring screen body to the metal base (3) with bolts and tighten the quick connection device to complete the installation.

9. The method for manufacturing the composite material annular fixed hard curtain according to claim 8, characterized in that: The molding die is used for processing composite material petals (1), and the molding die comprises a mold cover (9) and a bottom film (10), the bottom of the mold cover (9) is arc-shaped, the top of the bottom film (10) is arc-shaped, and the arc of the bottom of the mold cover (9) corresponds to the arc of the top of the bottom film (10). Step S1 specifically comprises the following steps: S11: evenly coating the surface of the molding die with a release agent, and spreading the prepreg on the upper surface of the base film (10) so that the prepreg is completely attached to the surface of the molding die; S12: After the prepreg is laid, the excess part is trimmed, the mold cover (9) is placed on the prepreg and the base film (10), and a hot press is used to apply pressure to the top of the mold cover (9), and the pressure is maintained until the product is solidified and formed, and then demoulding is performed after forming; S13: After demoulding, the surface of the blank is polished smooth and sprayed with paint.

10. The method for manufacturing a composite material annular fixed hard curtain according to claim 8, characterized in that: Step S2 specifically includes the following steps: S21: preheating the pultruder, fixing the yarn guide plate (11), the preforming plate (12), the glue injection box (13), the glue scraper plate (14) and the rectangular tube forming mold (15) on the pultruder operating table in sequence, installing the fiber bundle yarn on the yarn rack, pulling out the sand head, and evenly inserting it into the hole of the yarn guide plate (11); S22: preparing and stirring a glue solution, and pouring the stirred glue solution into a glue injection box (13) to allow the glue solution to soak the fiber bundle yarn; S23: Setting the temperature of the rectangular tube forming die (15), then heating the die, and starting the pultrusion machine and the traction device after reaching a predetermined temperature; S24: The fiber bundle yarn passes through the hole of the yarn guide plate (11), and then passes through the preformed plate (12), the glue injection box (13), the scraper plate (14) and the rectangular forming mold (15) in sequence, thereby obtaining a composite material rectangular tube.

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