Scroll type heat-proof and radiation-proof folding and unfolding mechanism and working method thereof

Abstract

The invention relates to a reel type heat-proof and radiation-proof folding and unfolding mechanism which comprises a composite material top plate, a plurality of driving mechanisms, aluminum-plated flexible films and an aluminum-plated flexible film unlocking assembly, a plurality of arc grooves are evenly formed in the periphery of the lower end face of the composite material top plate, and the aluminum-plated flexible films are folded in the arc grooves correspondingly; a plurality of driving mechanisms are uniformly mounted on the lower end face of the composite material top plate and located between the adjacent arc grooves, thin-wall elastic telescopic rods are wound around the driving mechanisms, and the outer side ends of the aluminum-plated flexible films are connected with the outer side ends of the thin-wall elastic telescopic rods on the two sides; each aluminum-plated flexible film unlocking assembly comprises a fixed end, an electric heating end and a fixed rope, the fixed rope bypasses the aluminum-plated flexible film on the arc groove, the two ends of the fixed rope are connected with the fixed end and the electric heating end respectively, and the fixed rope is fused when the electric heating end emits heat, so that the aluminum-plated flexible film is released. The mechanism is simple in structure, light in weight, small in energy consumption, small in occupied space when folded and good in heat-proof and radiation-proof effect when unfolded.

Description

Technical Field

[0001] The invention relates to a scroll-type heat-proof and radiation-proof folding and unfolding mechanism and a working method thereof. Background Art

[0002] When some pressure vessels containing cryogenic liquids are working in a light irradiation environment, some heat and radiation protection measures need to be taken on the pressure vessels to slow down the evaporation rate of the cryogenic liquids. For example, for the upper stage of a cryogenic rocket, in order to slow down the evaporation rate without causing too much negative impact on the carrying capacity and reliability of the launch vehicle, the heat and radiation protection mechanism is required to have the characteristics of high reliability and light weight. The traditional protection scheme is to spray a heat-proof coating on the surface of the cryogenic container or to use an inflatable mast to form a sunshade. The former has a simple structure but is not resistant to aerodynamic pressure erosion. It needs to provide additional protection measures in the atmospheric flight stage, which is costly and heavy. Although the latter does not need to provide additional protection measures in the atmospheric flight stage, it has a complex structure and low reliability. The gas source for the mast to unfold needs to set up an additional gas line or install a gas cylinder. Therefore, in view of the shortcomings of the traditional protection scheme, it is necessary to design and develop a heat and radiation protection folding and unfolding mechanism that can be unfolded autonomously.

[0003] It has the advantages of low energy consumption, light weight, simple structure, high reliability, strong size adaptability, and high volume storage ratio, and can meet the protection needs in complex environments. Summary of the invention

[0004] The object of the present invention is to provide a scroll-type heat-proof and radiation-proof folding and unfolding mechanism and a working method thereof, which has a simple structure, light weight, low energy consumption, small space occupation when folded, and good heat-proof and radiation-proof effect when unfolded.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a scroll-type heat-proof and radiation-proof folding and unfolding mechanism, comprising a composite material top plate, a plurality of driving mechanisms, a plurality of aluminum-plated flexible films and a plurality of aluminum-plated flexible film unlocking components, the lower end surface of the composite material top plate is evenly provided with a plurality of arc grooves, the plurality of aluminum-plated flexible films are respectively folded in the corresponding arc grooves, the plurality of driving mechanisms are evenly installed on the lower end surface of the composite material top plate and are respectively located between adjacent arc grooves, a thin-walled elastic telescopic rod is respectively wound on each driving mechanism, the outermost left and right ends of each aluminum-plated flexible film are respectively connected to the outer ends of the thin-walled elastic telescopic rods on the driving mechanisms on the left and right sides, so as to drive the aluminum-plated flexible film to unfold outward when the thin-walled elastic telescopic rod pops outward; the plurality of aluminum-plated flexible film unlocking components are respectively arranged beside the corresponding arc grooves, each aluminum-plated flexible film unlocking component comprises a fixed end, an electric heating end and a fixed rope, the fixed rope bypasses the aluminum-plated flexible film on the arc groove, and its two ends are respectively connected to the fixed end and the electric heating end, and are melted when the electric heating end heats up, thereby releasing the aluminum-plated flexible film.

[0006] Furthermore, the thin-walled elastic telescopic rod is wound along the length direction, and the thin-walled elastic telescopic rod is bent along the width direction, so that when the wound thin-walled elastic telescopic rod is fully popped out, it is bent along the width direction to form a straight line structure with a certain rigidity; the thin-walled elastic telescopic rod extends downward and outward when it is fully popped out; the aluminum-plated flexible film is a trapezoid when it is fully unfolded, the inner end of the aluminum-plated flexible film is the upper base of the trapezoid, and is fixedly connected to the arc groove, the outer end of the aluminum-plated flexible film is the lower base of the trapezoid, and its left and right ends are respectively connected to the outer ends of the thin-walled elastic telescopic rod on the driving mechanisms on the left and right sides.

[0007] Furthermore, the driving mechanism includes a mounting seat, a central rotating shaft, and an unlocking assembly. The mounting seat is an inverted U-shaped structure formed by connecting a first side plate, a top plate, and a second side plate. The central rotating shaft and the unlocking assembly are installed in the mounting seat, the unlocking assembly is installed on the inner side of the first side plate, and the central rotating shaft is installed on the inner side of the second side plate; the central rotating shaft includes a rotating shaft and a rotating damper, the rotating shaft is installed on the rotating damper, and the rotating damper is installed on the inner side of the second side plate; a rectangular E is opened on the side wall of the rotating shaft, and the inner end of the thin-walled elastic telescopic rod is fixed to the rotating shaft The locking member is connected to the support plate via a spring, and the support plate is fixedly connected to the inner side surface of the first side plate; a protrusion is provided at the front end of the locking block, and a groove is correspondingly provided at the front end of the rotating shaft, and the protrusion of the locking block and the groove of the rotating shaft are clearance-matched; the fixing plate is fixedly connected to the inner side surface of the second side plate, and the electric heating plate is fixedly connected to the side wall of the locking block, and the two ends of the locking rope are respectively connected to the electric heating plate and the fixing plate, and are melted when the electric heating plate is heated; An electric control module is installed on the composite material top plate; the electric control module includes a two-way remote control switch, a battery and a wire, the input ends of the two-way remote control switch are respectively connected to the battery, and the output ends are respectively connected to the electric heating end of the aluminum-plated flexible film unlocking component and the electric heating plate of the unlocking component.

[0008] Furthermore, a flat round protrusion block is provided at the rear end of the rotating shaft, ear holes are respectively provided at both ends of the rotary damper, and an flat round hole is provided in the center, and a mounting hole C matching the ear hole of the rotary damper is opened on the inner side surface of the second side plate, and the rotating shaft is interference fit with the flat round hole of the rotary damper through the flat round protrusion block, and the rotary damper is fixedly mounted on the mounting hole C of the second side plate through the two ear holes.

[0009] Furthermore, the driving mechanism also includes a guide member, and the guide member is installed on the top plate in the mounting seat.

[0010] Furthermore, the composite material top plate is a thin-walled annular body with a through hole in the middle, and the lower end surface of the composite material top plate changes from the inside to the outside in a convex-concave manner along the radial direction, forming an inner convex annular surface on the inside, a concave annular surface in the middle and an outer convex annular surface on the outside, and the thickness of the composite material top plate at the inner convex annular surface and the outer convex annular surface is the same, and the thickness at the concave annular surface is less than the thickness at the inner convex annular surface and the outer convex annular surface; the arc groove is opened on the outer convex annular surface, and the driving mechanism is installed on the outer convex annular surface.

[0011] Furthermore, it includes 6 driving mechanisms and 6 aluminum-plated flexible films. The circumference of the lower end surface of the composite material top plate is correspondingly provided with 6 arc grooves for accommodating the aluminum-plated flexible films in a folded state. The circumference of the lower end surface of the composite material top plate is correspondingly provided with mounting holes A at the 6 driving mechanism mounting positions. The 6 driving mechanisms are respectively installed on the corresponding mounting holes A on the circumference of the lower end surface of the composite material top plate by bolt connection.

[0012] Furthermore, it includes 12 aluminized flexible film unlocking components, and each aluminized flexible film is equipped with 2 aluminized flexible film unlocking components, which are used to lock the aluminized flexible film and thus restrict the thin-walled elastic telescopic rod from popping out.

[0013] Furthermore, the outermost left and right ends of the aluminum-plated flexible film are respectively bonded to the outer ends of the thin-walled elastic telescopic rods on the left and right driving mechanisms through double-sided polyimide tapes.

[0014] The present invention also provides a working method of the above-mentioned roller-type heat and radiation protection folding and unfolding mechanism, comprising the following steps: S1. Initially, the aluminized flexible film is in a folded state, and the thin-walled elastic telescopic rod is in a rolled state; S2. When the mechanism is to be turned on, the host computer sends conduction signals to the two remote control switches of the electric control module on the composite material top plate in sequence; S3, a remote control switch connected to the electric heating end of the aluminum-plated flexible film unlocking component turns on the power supply circuit of the electric heating end, and the electric heating end is energized and heated, so that the fixing rope on the aluminum-plated flexible film unlocking component is heated and melted, thereby releasing the aluminum-plated flexible film; S4, another remote control switch connected to the electric heating plate of the unlocking component on the driving mechanism turns on the power supply circuit of the electric heating plate, and the electric heating plate is powered on and generates heat, so that the locking rope of the unlocking component on the driving mechanism is heated and melted, releasing the thin-walled elastic telescopic rod; S5. At this time, the aluminum-coated flexible film and the thin-walled elastic telescopic rod are no longer constrained. The thin-walled elastic telescopic rod automatically pops outward under the action of the elastic strain energy stored in itself, driving the aluminum-coated flexible film to deploy outward to form a multi-faceted pyramid-shaped protective tent.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a reel-type heat-proof and radiation-proof folding and unfolding mechanism and its working method, the mechanism has a simple structure and low quality, when in the folded state, the whole mechanism is basically in the shape of a flat cylinder, and the occupied space is minimized; when in the unfolded state, the thin-walled elastic telescopic rods respectively pull the mutually independent aluminum-plated flexible films to unfold, forming a shape similar to a multi-sided pyramid, so that a shadow area is formed on the surface of the covered cylinder, and the purpose of heat-proof and radiation-proof is achieved. The mechanism uses the thin-walled elastic telescopic rod as the skeleton of the heat-proof and radiation-proof aluminum-plated flexible film, and realizes its automatic release and ejection by fusing the thin rope that limits the unfolding of the aluminum-plated flexible film and the thin-walled elastic telescopic rod, thereby realizing the passive high-reliability unfolding of the heat-proof and radiation-proof aluminum-plated flexible film, significantly reducing the complexity and energy consumption of the overall structure, and compared with the prior art, it has the advantages of low energy consumption, light weight, high reliability, strong size adaptability, high volume storage ratio, etc., and can meet the heat-proof and radiation-proof needs in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the roll-up heat and radiation protection folding and unfolding mechanism of an embodiment of the present invention when it is in an unfolded state; Figure 2 is a schematic structural diagram of a composite material top plate according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a composite material top plate (excluding the driving mechanism) in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a driving mechanism in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a driving mechanism in an embodiment of the present invention (from another perspective); Figure 6 is a schematic structural diagram of a central rotating shaft in an embodiment of the present invention; Figure 7 is a schematic structural diagram of a rotating shaft in an embodiment of the present invention; Figure 8 is a schematic structural diagram of a rotary damper in an embodiment of the present invention; Fig. 9 is a schematic diagram of the structure of an unlocking assembly (excluding a locking rope) in an embodiment of the present invention; Fig.10 Schematic diagram of the unfolded state of a single piece of aluminum-plated flexible film in an embodiment of the present invention; Fig.11 Schematic diagram of the structure of a thin-walled elastic telescopic rod in an embodiment of the present invention.

[0017] In the figure: 1-composite material top plate; 111-mounting hole A; 112-external convex annular surface; 113-middle concave annular surface; 114-inner convex annular surface; 115-arc groove; 12-aluminum-plated flexible film unlocking component; 121-fixed end; 122-electric heating end; 123-fixed rope; 2-driving mechanism; 21-top plate; 22-guide member; 231-rotating shaft; 232-rotating damper; 233-rectangular hole E; 23 4-flat round protrusion; 241-locking block; 242-spring; 243-support plate; 244-electric heating plate; 245-bump; 246-fixing plate; 25-first side plate; 251-mounting hole D; 252-locking rope; 253-mounting hole C; 26-thin-walled elastic telescopic rod; 261-outer end of thin-walled elastic telescopic rod; 262-inner end of thin-walled elastic telescopic rod; 27-second side plate; 3-aluminum-plated flexible film. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] like Figure 1-11As shown, the present embodiment provides a scroll-type heat-proof and radiation-proof folding and unfolding mechanism, including a composite material top plate 1, a plurality of driving mechanisms 2, a plurality of aluminized flexible films 3 and a plurality of aluminized flexible film unlocking components 12, a plurality of arc grooves 115 are evenly opened on the circumference of the lower end surface of the composite material top plate 1, the plurality of aluminized flexible films 3 are respectively folded in the corresponding arc grooves 115, the plurality of driving mechanisms 2 are evenly installed on the circumference of the lower end surface of the composite material top plate 1 and are respectively located between adjacent arc grooves 115, a thin-walled elastic telescopic rod 26 is respectively wound on each driving mechanism 2, and the outermost left and right ends of each aluminized flexible film 3 are respectively It is connected to the outer ends of the thin-walled elastic telescopic rods 26 on the driving mechanisms 2 on the left and right sides, so as to drive the aluminum-plated flexible film 3 to expand outward when the thin-walled elastic telescopic rods 26 pop outward; the multiple aluminum-plated flexible film unlocking components 12 are respectively arranged on the sides of the corresponding arc grooves 115, and each aluminum-plated flexible film unlocking component 12 includes a fixed end 121, an electric heating end 122 and a fixed rope 123, the fixed rope 123 bypasses the aluminum-plated flexible film 3 on the arc groove 115, and its two ends are respectively connected to the fixed end 121 and the electric heating end 122, and melt when the electric heating end 122 heats up, thereby releasing the aluminum-plated flexible film 3.

[0022] like Figure 2-3 As shown, the composite material top plate 1 is a thin-walled annular body with a through hole in the middle, and the lower end surface of the composite material top plate 1 changes from the inside to the outside in a convex-concave manner along the radial direction, forming an inner convex annular surface on the inside, a concave annular surface in the middle and an outer convex annular surface on the outside, and the thickness of the composite material top plate 1 at the inner convex annular surface and the outer convex annular surface is the same, and the thickness at the concave annular surface is less than the thickness at the inner convex annular surface and the outer convex annular surface; the arc groove 115 is opened on the outer convex annular surface, and the driving mechanism 2 is installed on the outer convex annular surface.

[0023] In this embodiment, the roll-type heat-proof and radiation-proof folding and unfolding mechanism includes 6 driving mechanisms 2, 6 aluminum-plated flexible films 3 and 12 aluminum-plated flexible film unlocking components 12. The lower end surface of the composite material top plate 1 is provided with 6 arc grooves 115 for receiving the aluminum-plated flexible film 3 in the folded state, and the lower end surface of the composite material top plate 1 is provided with mounting holes A 111 at the mounting positions of the 6 driving mechanisms 2. The 6 driving mechanisms 2 are respectively installed on the corresponding mounting holes A 111 at the lower end surface of the composite material top plate 1 by bolt connection. Each aluminum-plated flexible film 3 is equipped with 2 aluminum-plated flexible film unlocking components 12, which are used to lock the aluminum-plated flexible film 3, thereby limiting the thin-walled elastic telescopic rod 26 from popping out.

[0024] like Figure 4-6As shown, the driving mechanism 2 includes a mounting seat, a central rotating shaft, an unlocking assembly and a guide member 22. The mounting seat is an inverted U-shaped structure formed by connecting a first side plate 25, a top plate 21 and a second side plate 27. The central rotating shaft and the unlocking assembly are installed in the mounting seat. The unlocking assembly is installed on the inner side surface of the first side plate 25, and the central rotating shaft is installed on the inner side surface of the second side plate 27; the central rotating shaft includes a rotating shaft 231 and a rotating damper 232, and the rotating shaft 231 is installed on the rotating damper 232, and the rotating damper 232 is installed on the inner side surface of the second side plate 27; a rectangle E 233 is opened on the side wall of the rotating shaft 231, and the inner end of the thin-walled elastic telescopic rod 26 is fixed on the rectangle E 233 of the rotating shaft 231 and then wound on the rotating shaft 231.

[0025] like Figure 7-8 As shown, a flat round protrusion 234 is provided at the rear end of the rotating shaft 231, ear holes are respectively provided at both ends of the rotating damper 232, and a flat round hole is provided in the center, and a mounting hole C 253 matching with the ear hole of the rotating damper 232 is opened on the inner side surface of the second side plate 27, and the rotating shaft 231 is interference-fitted with the flat round hole of the rotating damper 232 through the flat round protrusion 234, and the rotating damper 232 is fixedly mounted on the mounting hole C 253 of the second side plate 27 through the two ear holes.

[0026] like Fig. 9 As shown, the unlocking assembly includes a locking block 241, a spring 242, a support plate 243, a locking rope 252, a fixing plate 246 and an electric heating plate 244; the rear end of the locking block 241 is connected to the support plate 243 via the spring 242, and the support plate 243 is fixedly connected to the inner side surface of the first side plate 25 (the first side plate 25 is provided with a mounting hole D251 for fixed connection with the support plate 243); a protrusion 245 is provided at the front end of the locking block 241, and a groove is correspondingly provided at the front end of the rotating shaft 231, and the protrusion 245 of the locking block 241 and the groove of the rotating shaft 231 are gap-matched to limit the rotation of the rotating shaft 231; the fixing plate 246 is fixedly connected to the inner side surface of the second side plate 27, and the electric heating plate 244 is fixedly connected to the side wall of the locking block 241, and the two ends of the locking rope 252 are respectively connected to the electric heating plate 244 and the fixing plate 246, and are melted when the electric heating plate 244 is heated. The guide member 22 is installed on the top plate 21 in the mounting seat.

[0027] An electric control module is installed on the composite material top plate 1; the electric control module includes a two-way remote control switch, a battery and a wire, the input ends of the two-way remote control switch are respectively connected to the battery, and the output ends are respectively connected to the electric heating end 122 of the aluminum-plated flexible film unlocking component 12 and the electric heating plate 244 of the unlocking component.

[0028] like Figure 10-11 As shown, the thin-walled elastic telescopic rod 26 is wound along the length direction, and the thin-walled elastic telescopic rod 26 is bent along the width direction, so that when the wound thin-walled elastic telescopic rod 26 is fully ejected, it is bent along the width direction to form a straight line structure with a certain rigidity; the thin-walled elastic telescopic rod 26 extends downward and outward when it is fully ejected; the aluminized flexible film 3 is a trapezoid when it is fully unfolded, the inner side end of the aluminized flexible film 3 is the upper bottom edge of the trapezoid, and is fixedly connected to the arc groove 115, the outer side end of the aluminized flexible film 3 is the lower bottom edge of the trapezoid, and its left and right ends are respectively connected to the outer ends of the thin-walled elastic telescopic rod 26 on the left and right driving mechanisms 2. In this embodiment, the outermost left and right ends of the aluminized flexible film 3 are respectively bonded to the outer ends of the thin-walled elastic telescopic rod 26 on the left and right driving mechanisms 2 by double-sided polyimide tape.

[0029] like Fig.11 As shown, the thin-walled elastic telescopic rod 26 is L , the central angle is α (60°≤α<360°), the thickness is t The fiber composite material is prepared and the initial radius is R The longitudinal open round rod, its stiffness can be customized according to actual needs.

[0030] In this embodiment, the material used for the composite top plate 1 is a carbon fiber-epoxy resin composite material. In some preferred embodiments, the matrix material may also be an aluminum alloy, a beryllium copper alloy, or the like.

[0031] In this embodiment, the aluminum-plated flexible film is made of a flexible film material, and a silver-plated flexible film may also be used.

[0032] In this embodiment, when the use environment repeatedly experiences sudden temperature changes, a polyimide tape may be attached to the aluminized flexible film in a grid shape to prevent the film from being damaged due to sudden temperature rise or drop.

[0033] When installing the mechanism, firstly, the central rotating shaft, the locking rope and the fixing plate are installed on the second side plate in a threaded connection manner; the locking block, the spring and the supporting plate are installed on the first side plate in a threaded connection manner, and the central rotating shaft is fixed by the interference fit of the groove and the protrusion; the inner end of the thin-walled elastic telescopic rod is wound around the central rotating shaft through the rectangular hole; the six assembled driving mechanisms are installed on the composite material top plate in a threaded connection manner; the ends of the aluminum-plated flexible film are respectively bonded to the outer ends of the two thin-walled elastic telescopic rods with radial curvatures facing outwards with double-sided polyimide tape, and are folded and fixed in the arc groove at the lower end of the composite material top plate; the aluminum-plated flexible film unlocking assembly is installed on the composite material top plate to fix the flexible film; the installed reel-type heat-proof and radiation-proof folding and unfolding mechanism is installed on the top of the carrier rocket payload cabin, and the installation process is completed.

[0034] This embodiment also provides a working method of the above-mentioned roller-type heat and radiation protection folding and unfolding mechanism, including the following steps: S1. Initially, the aluminized flexible film 3 is in a folded state, and the thin-walled elastic telescopic rod 26 is in a rolled state.

[0035] S2. When the mechanism is to be turned on, the host computer sends conduction signals to the two remote control switches of the electric control module on the composite material top plate 1 in sequence.

[0036] S3, a remote control switch connected to the electric heating end 122 on the aluminum-plated flexible film unlocking component 12 turns on the power supply circuit of the electric heating end 122, and the electric heating end 122 is energized and heated, so that the fixing rope 123 on the aluminum-plated flexible film unlocking component 12 is heated and melted, releasing the aluminum-plated flexible film 3.

[0037] S4. Another remote control switch connected to the electric heating plate 244 of the unlocking component on the driving mechanism turns on the power supply circuit of the electric heating plate 244. The electric heating plate 244 is powered on and generates heat, so that the locking rope 252 of the unlocking component on the driving mechanism is melted by the heat, and the locking block 241 is separated from the central rotating shaft under the contraction of the spring 242, thereby releasing the rotation constraint of the central rotating shaft, so that the thin-walled elastic telescopic rod 26 can be released.

[0038] S5. At this time, the aluminum-plated flexible film 3 and the thin-walled elastic telescopic rod 26 are no longer constrained. The thin-walled elastic telescopic rod 26 automatically pops outward under the action of its own stored elastic strain energy, driving the aluminum-plated flexible film 3 to deploy outward to form a multi-sided pyramid-shaped protective tent.

[0039] This elastic strain energy comes from the thin-walled elastic telescopic rod. The thin-walled elastic telescopic rod itself has elastic strain energy in the rewinding state (the curling direction is opposite to the buckling direction). After the rotation axis is unlocked, the elastic strain energy is released, so that it rotates and pops out. The rotation damper plays a role in limiting the rotation axis speed during this rotation and popping process, preventing the thin-walled elastic telescopic rod from unfolding too quickly and tearing the sail membrane.

[0040] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A scroll-type heat and radiation protection folding and unfolding mechanism, characterized in that: The invention comprises a composite material top plate (1), a plurality of drive mechanisms (2), a plurality of aluminum-plated flexible films (3), and a plurality of aluminum-plated flexible film unlocking components (12); a plurality of arc grooves (115) are evenly formed on the circumference of the lower end surface of the composite material top plate (1); the plurality of aluminum-plated flexible films (3) are respectively folded into corresponding arc grooves (115); the plurality of drive mechanisms (2) are evenly installed on the circumference of the lower end surface of the composite material top plate (1) and are respectively located between adjacent arc grooves (115); a thin-walled elastic telescopic rod (26) is respectively wound around each drive mechanism (2); the outermost left and right ends of each aluminum-plated flexible film (3) are respectively connected to the left and right sides of the drive mechanism (2) The outer end of the thin-walled elastic telescopic rod (26) is connected to the outer end of the thin-walled elastic telescopic rod (26), so as to drive the aluminum-plated flexible film (3) to expand outward when the thin-walled elastic telescopic rod (26) pops outward; the plurality of aluminum-plated flexible film unlocking components (12) are respectively arranged beside the corresponding arc groove (115), and each aluminum-plated flexible film unlocking component (12) comprises a fixed end (121), an electric heating end (122) and a fixed rope (123), the fixed rope (123) bypasses the aluminum-plated flexible film (3) on the arc groove (115), and its two ends are respectively connected to the fixed end (121) and the electric heating end (122), and melt when the electric heating end (122) is heated, thereby releasing the aluminum-plated flexible film (3).

2. A roll-type heat and radiation protection folding and unfolding mechanism according to claim 1, characterized in that: The thin-walled elastic telescopic rod (26) is wound along the length direction, and the thin-walled elastic telescopic rod (26) is bent along the width direction, so that when the wound thin-walled elastic telescopic rod (26) is fully ejected, it is bent along the width direction to form a straight line structure with a certain rigidity; when the thin-walled elastic telescopic rod (26) is fully ejected, it extends downward and outward; when the aluminum-plated flexible film (3) is fully unfolded, it is a trapezoid, the inner side end of the aluminum-plated flexible film (3) is the upper bottom edge of the trapezoid, and is fixedly connected to the circular arc groove (115), and the outer side end of the aluminum-plated flexible film (3) is the lower bottom edge of the trapezoid, and its left and right ends are respectively connected to the outer sides of the thin-walled elastic telescopic rod (26) on the left and right driving mechanisms (2).

3. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 1, characterized in that: The driving mechanism (2) comprises a mounting seat, a central rotating shaft, and an unlocking assembly. The mounting seat is an inverted U-shaped structure formed by connecting a first side plate (25), a top plate (21), and a second side plate (27). The central rotating shaft and the unlocking assembly are mounted in the mounting seat. The unlocking assembly is mounted on the inner side surface of the first side plate (25), and the central rotating shaft is mounted on the inner side surface of the second side plate (27). The central rotating shaft comprises a rotating shaft (231) and a rotating damper (232). The rotating shaft (231) is mounted on the rotating damper (232), and the rotating damper (232) is mounted on the inner side surface of the second side plate (27). A rectangular E (233) is provided on the side wall of the rotating shaft (231). The inner side end of the thin-walled elastic telescopic rod (26) is fixed on the rectangular E (233) of the rotating shaft (231) and then wound on the rotating shaft (231). The unlocking assembly comprises a lock A tightening block (241), a spring (242), a support plate (243), a locking rope (252), a fixing plate (246) and an electric heating plate (244); the rear end of the locking block (241) is connected to the support plate (243) via the spring (242), and the support plate (243) is fixedly connected to the inner side surface of the first side plate (25); the front end of the locking block (241) is provided with a protrusion (245), and the front end of the rotating shaft (231) is correspondingly provided with a groove, and the protrusion (245) of the locking block (241) and the groove of the rotating shaft (231) are gap-matched; the fixing plate (246) is fixedly connected to the inner side surface of the second side plate (27), and the electric heating plate (244) is fixedly connected to the side wall of the locking block (241); the two ends of the locking rope (252) are respectively connected to the electric heating plate (244) and the fixing plate (246), and are fused when the electric heating plate (244) is heated; An electric control module is installed on the composite material top plate (1); the electric control module comprises a two-way remote control switch, a battery and a wire, the input ends of the two-way remote control switch are respectively connected to the battery, and the output ends are respectively connected to the electric heating end (122) of the aluminum-plated flexible film unlocking component (12) and the electric heating plate (244) of the unlocking component.

4. A roll-type heat and radiation protection folding and unfolding mechanism according to claim 3, characterized in that: A flat round protrusion (234) is provided at the rear end of the rotating shaft (231); ear holes are provided at both ends of the rotating damper (232) and an oblong hole is provided at the center; a mounting hole C (253) matching the ear hole of the rotating damper (232) is provided on the inner side surface of the second side plate (27); the rotating shaft (231) is interference-fitted with the oblong hole of the rotating damper (232) through the oblong protrusion (234); and the rotating damper (232) is fixedly mounted on the mounting hole C (253) of the second side plate (27) through the two ear holes.

5. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 3, characterized in that: The driving mechanism (2) further comprises a guide member (22), wherein the guide member (22) is mounted on a top plate (21) in the mounting seat.

6. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 1, characterized in that: The composite material top plate (1) is a thin-walled annular body with a through hole in the middle. The lower end surface of the composite material top plate (1) changes from convex to concave along the radial direction from the inside to the outside, forming an inner convex annular surface on the inside, a middle concave annular surface in the middle and an outer convex annular surface on the outside. The thickness of the composite material top plate (1) at the inner convex annular surface and the outer convex annular surface is the same, and the thickness at the middle concave annular surface is less than the thickness at the inner convex annular surface and the outer convex annular surface; the arc groove (115) is provided on the outer convex annular surface, and the drive mechanism (2) is mounted on the outer convex annular surface.

7. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 1, characterized in that: The composite material top plate (1) comprises six drive mechanisms (2) and six aluminized flexible films (3); six arc grooves (115) for accommodating the aluminized flexible films (3) in a folded state are provided on the circumference of the lower end surface of the composite material top plate (1); mounting holes A (111) are provided on the circumference of the lower end surface of the composite material top plate (1) at the mounting positions of the six drive mechanisms (2); and the six drive mechanisms (2) are respectively mounted on the corresponding mounting holes A (111) on the circumference of the lower end surface of the composite material top plate (1) by means of bolt connection.

8. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 7, characterized in that: It comprises 12 aluminized flexible film unlocking components (12), each aluminized flexible film (3) being provided with two aluminized flexible film unlocking components (12) for locking the aluminized flexible film (3) and thereby restricting the thin-walled elastic telescopic rod (26) from popping outwards.

9. The roll-type heat and radiation protection folding and unfolding mechanism according to claim 1, characterized in that: The outermost left and right ends of the aluminum-plated flexible film (3) are respectively bonded to the outer ends of the thin-walled elastic telescopic rods (26) on the left and right driving mechanisms (2) via double-sided polyimide tape.

10. A working method of a roll-type heat and radiation protection folding and unfolding mechanism according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, initially, the aluminum-plated flexible film (3) is in a folded state, and the thin-walled elastic telescopic rod (26) is in a rolled-up state; S2, when the mechanism is to be turned on, the host computer sends conduction signals to the two remote control switches of the electric control module on the composite material top plate (1) in sequence; S3, a remote control switch connected to the electric heating end (122) on the aluminum-plated flexible film unlocking component (12) turns on the power supply circuit of the electric heating end (122), and the electric heating end (122) is energized and heated, so that the fixing rope (123) on the aluminum-plated flexible film unlocking component (12) is melted by the heat, thereby releasing the aluminum-plated flexible film (3); S4, another remote control switch connected to the electric heating plate (244) of the unlocking component on the driving mechanism turns on the power supply circuit of the electric heating plate (244), and the electric heating plate (244) is powered on to generate heat, so that the locking rope (252) of the unlocking component on the driving mechanism is melted by the heat, thereby releasing the thin-walled elastic telescopic rod (26); S5. At this time, the aluminum-plated flexible film (3) and the thin-walled elastic telescopic rod (26) are no longer constrained. The thin-walled elastic telescopic rod (26) automatically pops outward under the action of its own stored elastic strain energy, driving the aluminum-plated flexible film (3) to deploy outward, forming a protective tent in the shape of a multi-sided pyramid.

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