Reusable fragile cover of launch box and launch box

Abstract

The utility model belongs to the field of launch boxes, and discloses a reusable launch box fragile cover and a launch box, the reusable launch box fragile cover comprises a cover frame, a fragile cover body and a pressing plate, the fragile cover body is composed of a plurality of springback petal bodies, and the springback petal bodies comprise elastic bodies, skins and light fillers, so that the fragile cover can be opened and folded outwards under the action of external force; meanwhile, the springback petal bodies can be recovered, so that the fragile cover can be repeatedly used, and the maintenance cost is greatly reduced; in addition, due to the adoption of the design of the springback petal bodies, the damage to operators, peripheral equipment and the environment caused by splinters generated by opening the cover in a traditional explosion mode is avoided, and the safety is improved. By the adoption of the fragile cover, the problems that an existing fragile cover of the launching box is disposable, maintenance cost is high, and potential safety hazards exist are effectively solved; the fragile cover has the advantages of light weight, water resistance, dust resistance, corrosion resistance and the like; and the strength is high, the response is fast, rebounding can be achieved, and an internal missile can be effectively isolated from the outside when not in use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of launch box, especially relates to a reusable launch box fragile cover and launch box. BACKGROUND

[0002] The missile launch box fragile cover is a key component in the missile launch system, which is used as a sealing cover during missile launch. Its main function is to rapidly break during missile launch, provide sufficient exit space for the missile, and ensure that the missile warhead is not damaged. This design simplifies the launch process, improves the launch response speed in wartime, and avoids the design of mechanical structure opening or pre-ignition explosion mechanism that may damage the missile seeker.

[0003] Currently, the traditional fragile cover usually adopts a blasting type opening cover. The blasting type opening fragile cover has the advantages of rapid cover opening in the missile launch system. However, the blasting type opening cover is a disposable product, and the fragments cannot be restored, so it needs to be replaced after each use, resulting in high maintenance cost. In addition, the fragments generated during the blasting process need to splash in a predetermined direction. If the precise adjustment and positioning are not performed before launch, the fragments after the fragile cover is damaged may cause damage to the operators and their surrounding equipment and environment.

[0004] Therefore, the existing launch box fragile cover has certain safety hazards and high maintenance cost due to the design of one-time throwing structure. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of reusable launch box fragile cover and launch box to solve the technical problems that the existing launch box fragile cover has certain safety hazards and high maintenance cost due to the design of one-time throwing structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical contents:

[0007] In the first aspect, the utility model provides a kind of reusable launch box fragile cover, which comprises a cover frame, a fragile cover body and a pressing plate. The fragile cover body is connected to the cover frame through the pressing plate.

[0008] The fragile cover body comprises a top cover and a plurality of structure-same resilient petals.

[0009] The resilient petals comprise an elastic body, a skin and a lightweight filler.

[0010] The skin is the outermost layer of the resilient petals, and the internal cavity is filled with the lightweight filler.

[0011] The elastic body is arranged between the skin and the lightweight filler at the top, and is located at the bending position of the resilient petals.

[0012] The top cover is connected with one of the resilient petals, and the top cover is provided with a stepped surface, and the remaining resilient petals are overlapped on the stepped surface of the top cover; the outer surfaces of all the resilient petals and the outer surfaces of the resilient petals form a complete spherical surface structure.

[0013] Further, the cover frame adopts a ring structure, and the frangible cover body is a spherical surface structure as a whole; the outer edge of the frangible cover body is connected to the circumferential direction of the cover frame through a pressing plate.

[0014] Further, the lightweight filler is made of foamed plastic material; and the elastomer is made of polyurethane, styrene-butadiene block copolymer or polyolefin material.

[0015] Further, the foamed plastic material adopts polymethylacrylimide, foamed polypropylene or polyurethane.

[0016] Further, the bottom of the bending part of the resilient petal is provided with an N-shaped principal stress groove for being broken by impact or engine gas flow.

[0017] Further, the cover frame is provided with a sealing ring on the circumferential inner wall.

[0018] Further, the top cover and the connected resilient petal are connected by riveting or integrated forming.

[0019] Further, the connection parts of the cover frame, the frangible cover body and the pressing plate are all coated with sealing glue; every two adjacent resilient petals are coated with sealing glue; and the connection parts of the resilient petal and the top cover are all coated with sealing glue.

[0020] Further, the skin adopts carbon fiber-epoxy resin or glass fiber-epoxy resin prepreg skin.

[0021] In the second aspect, the utility model provides a missile launching box, which comprises a box body and the reusable launching box frangible cover described above connected with the box body.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides a kind of reusable launch box fragile cover, the fragile cover is composed of cover frame, fragile cover body and pressing plate, fragile cover body is made of multiple resilient petals, these resilient petals include elastomer, skin and light filler, so that fragile cover can be opened and folded outward when being subjected to external force, while resilient petals can recover, realize the reuse of fragile cover, greatly reduce maintenance cost;In addition, due to the design of resilient petals, the damage caused by the traditional explosive opening cover fragments to operators and surrounding equipment, environment is avoided, and safety is improved.The utility model effectively solves the problems of existing launch box fragile cover, such as one-time use, high maintenance cost and security risks;The fragile cover not only has good properties such as light weight, waterproof, dustproof and corrosion resistance, but also has high strength, fast response and resilience, which can effectively isolate the internal missile from the outside environment when not in use, and has good popularization and application value.

[0024] Preferably, in the utility model, the material of the elastomer can be polyurethane, styrene-butadiene block copolymer or polyolefin, which has good elasticity and recovery, ensuring that the resilient petals can quickly recover after being subjected to external force, thereby prolonging the service life of the fragile cover.

[0025] Preferably, in the utility model, the light filler is made of foamed plastic material, which is light in weight and has certain strength, so as to reduce the weight of the fragile cover while ensuring the stability of the overall structure of the fragile cover, facilitating operation and use.

[0026] Further preferably, in the utility model, the foamed plastic is made of polymethylacrylimide, foamed polypropylene or polyurethane, which has good foaming performance and strength, meeting the use requirements of the fragile cover in specific environments and improving the reliability and durability of the fragile cover.

[0027] Preferably, in the utility model, N-shaped principal stress grooves are formed at the bending parts of the resilient petals, which can make the fragile cover more easily burst under the action of impact or engine gas flow, ensuring good mechanical properties and the formation of missile channel and the launching process of the missile.

[0028] Preferably, in the utility model, a sealing ring is arranged on the circumferential inner wall of the cover frame, which can enhance the sealing performance between the fragile cover and the launch box, prevent external gas or liquid from entering the launch box, and ensure the normal operation of the launch system.

[0029] Preferably, in the utility model, the connection between the top cover and the connected resilient petals is riveted or integrally formed, which can ensure the overall structural stability and reliability of the fragile cover, and if riveting is adopted, it is also convenient for assembling and disassembling the fragile cover; and the integrally formed structure further ensures the structural stability.

[0030] Preferably, the utility model discloses, at the junction of cover frame, fragile cover and pressboard, and the junction of reboundable flap and top cover are coated with sealing glue, this design can further enhance the sealing performance of fragile cover, prevent gas or liquid leakage, improve the reliability and safety of fragile cover. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The structure explosion map of the reusable launch box fragile cover provided by the utility model embodiment;

[0032] Figure 2 The structure schematic diagram of the outer surface side of the reusable launch box fragile cover provided by the utility model embodiment;

[0033] Figure 3 The structure schematic diagram of the inner surface side of the reusable launch box fragile cover provided by the utility model embodiment;

[0034] Figure 4 The side sectional view of the reboundable flap of the reusable launch box fragile cover provided by the utility model embodiment;

[0035] Figure 5 The connection diagram of the reboundable flap and top cover of the reusable launch box fragile cover provided by the utility model embodiment;

[0036] Figure 6 The structure schematic diagram of the reboundable flap of the reusable launch box fragile cover provided by the utility model embodiment;

[0037] Figure 7 The structure schematic diagram of the cover frame of the reusable launch box fragile cover provided by the utility model embodiment;

[0038] Figure 8 The structure schematic diagram of the sealing ring of the reusable launch box fragile cover provided by the utility model embodiment.

[0039] REFERENCE SIGNS:

[0040] 1, sealing ring;2, cover frame;3, fragile cover;4, pressboard;5, pin;

[0041] 3-1, reboundable flap;3-2, elastomer;3-3, skin;3-4, light filler;3-5, top cover. DETAILED DESCRIPTION

[0042] In order to make the technical problems solved by the utility model, the technical solutions and beneficial effects clearer and more apparent, the following specific embodiments are used to further describe the utility model in detail. It should be understood that the specific embodiments described herein are merely used to explain the utility model and not used to limit the utility model.

[0043] In order to make the technical problems solved by the utility model, the technical solutions and beneficial effects clearer and more apparent, the following specific embodiments are used to further describe the utility model in detail. It should be understood that the specific embodiments described herein are merely used to explain the utility model and not used to limit the utility model.

[0044] Therefore, the detailed description of the embodiments of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the utility model.

[0045] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0046] In the description of the embodiments of the utility model, it should be explained that if the orientation or position relationship indicated by the terms "upper", "lower", "horizontal", "inner" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship of the utility model product when it is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0047] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In the description of the embodiments of the utility model, still need explaining, unless another explicit provision and limitation, if appearing the term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the intercommunication. For ordinary skilled in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0049] Embodiment 1

[0050] As described in the background, at present, the fragile cover is a very important component in the missile launching system, the box cover ensures the sealing of the whole launching box and also plays a role in protecting the missile during ordinary storage. When launching the missile, the box cover needs to be opened in time and make the missile launch smoothly. The traditional mechanical opening cover and blasting opening cover have the defects of heavy quality, slow reaction time and high maintenance cost. Therefore, the existing launching box fragile cover has certain safety hazards and high maintenance cost due to the design of one-time throw-out structure.

[0051] In order to solve the above problems, the utility model provides a reusable launching box fragile cover and launching box, the reusable launching box fragile cover can be opened smoothly under small impact and has rebound performance, can be used repeatedly and avoids the safety hazard problem, the reusable launching box fragile cover does not need to replace the cover body repeatedly after the end of missile launching, can be reused, which greatly reduces the maintenance cost of the missile launching system.

[0052] As shown in Figure 1 , Figure 2 and Figure 3 , the embodiment provides a reusable launching box fragile cover, as shown in Figure 7 , the cover frame 2 presents as a ring structure, as the support frame of the whole structure.

[0053] The fragile cover body 3 is in the shape of a sphere as a whole, and the edge part is firmly connected along the periphery of the cover frame 2 by the pressing plate 4. In the embodiment, the pin 5 is used to fix the cover frame 2, the fragile cover body 3 and the pressing plate 4.

[0054] As shown in Figure 4 and Figure 6 , the fragile cover body 3 includes a top cover 3-5 and a plurality of reboundable petal bodies 3-1 with consistent structure; the reboundable petal bodies 3-1 are composed of an elastic body 3-2, a skin 3-3 and a light filler 3-4.

[0055] The skin 3-3 is the outermost layer of the resilient petals 3-1, and the internal cavity is filled with light filler 3-4, which can achieve the light weight of the overall fragile cover.

[0056] The elastic body 3-2 is arranged between the skin 3-3 and the light filler 3-4, and is located at the bending position of the resilient petals 3-1, so as to ensure that the petals can quickly restore to the original state after being stressed.

[0057] As shown in Figure 5 and Figure 6 , the top cover 3-5 is directly connected with one of the resilient petals 3-1, and the surface is designed with a stepped surface, so that the remaining 8 resilient petals 3-1 can be overlapped and attached on this stepped surface; when all the resilient petals 3-1 are arranged in this way, their outer surfaces together form a complete spherical surface structure, which corresponds to the overall shape of the fragile cover 3-5.

[0058] The fragile cover is composed of a cover frame, a fragile cover body and a pressing plate. The fragile cover body is composed of a plurality of resilient petals, which include an elastic body, a skin and a light filler, so that the fragile cover can be opened and folded outward when subjected to external force, and the resilient petals can be restored, realizing the reuse of the fragile cover and greatly reducing the maintenance cost. In addition, due to the design of the resilient petals, the damage caused by the fragments of the traditional explosive opening cover to the operators and the surrounding equipment and environment is avoided, and the safety is improved. The use of the fragile cover effectively solves the problems of one-time use, high maintenance cost and safety hazards of the existing launch box fragile cover. The fragile cover not only has good properties such as light weight, waterproofness, dustproofness and corrosion resistance, but also has high strength, fast response and resilience, can protect the internal missile from the outside when not in use, and has good popularization and application value.

[0059] The embodiment also provides a working principle of the reusable launch box fragile cover, which specifically includes:

[0060] When the reusable launch box fragile cover is subjected to the impact force inside the launch box, the top cover 3-5 is popped out under the action of the force, driving one of the resilient petals 3-1 connected with the top cover 3-5 to turn outward, and driving the remaining resilient petals 3-1 overlapped on the step of the top cover 3-5 to turn outward.

[0061] After all the resilient petals 3-1 are turned outward, a missile channel is formed for the missile to pass through.

[0062] All the resilient petals 3-1 are reset under the action of the internal elastic body 3-2, so as to maintain the integrity of the reusable launch box fragile cover.

[0063] Embodiment 2

[0064] The embodiment provides another reusable frangible cover of a launching box, which is further improved and optimized on the basis of the embodiment 1 and specifically as follows.

[0065] In combination Figure 1 and Figure 8 As shown in the figures, in order to enhance the sealing performance between the frangible cover and the launching box, prevent external gas or liquid from entering the inside of the launching box, the sealing ring 1 is arranged on the circumferential inner wall of the cover frame 2, the overall sealing performance is improved, and the normal operation of the launching system is ensured.

[0066] In the embodiment, in order to further enhance the sealing performance of the frangible cover, the sealing glue is coated at the connection between the cover frame 2, the frangible cover body 3 and the pressing plate 4, and the connection between the reboundable flap body 3-1 and the top cover 3-5; the sealing glue plays a role of weak connection between components, and can further enhance the sealing performance of the frangible cover, prevent gas or liquid leakage, and improve the reliability and safety of the frangible cover.

[0067] In the embodiment, the connection between the top cover 3-4 and the connected reboundable flap body 3-1 adopts riveting or one-piece forming, which can ensure the overall structural stability and reliability of the frangible cover; if riveting is adopted, the assembly and disassembly of the frangible cover are facilitated; and if one-piece forming structure is adopted, the structural stability is further ensured.

[0068] As shown in the figures Figure 4 and Figure 6 In the embodiment, the N-shaped principal stress groove is arranged at the bending position of the reboundable flap body 3-1; this design can make the frangible cover more easily burst under the action of the engine gas flow or explosion, ensure good mechanical properties, and ensure the formation of the missile channel and the launching process of the missile.

[0069] In the embodiment, the elastic body 3-2 of the reboundable flap body 3-1 is made of one of polyurethane, styrene-butadiene block copolymer or polyolefin, that is, PU, SBS, POE and the like.

[0070] In the embodiment, the lightweight filler 3-4 is made of foamed plastic material, and is made of polymethylacrylimide, foamed polypropylene or polyurethane material, that is, PMI / EPP / PU and the like.

[0071] In the embodiment, the skin 3-3 adopts carbon fiber-epoxy resin / glass fiber-epoxy resin prepreg skin.

[0072] In the embodiment, the reboundable flap body 3-1 is preferably 9, one of which is riveted to the top cover 3-5; and the other 8 reboundable flap bodies 3-1 are lapped on the bottom surface of the step of the top cover 3-5.

[0073] In the embodiment, the principle of the 9 reboundable flap bodies 3-1 is that:

[0074] For the whole fragile cover, according to the kinetic equation, it is assumed that a multi-rigid-body system composed of N rigid bodies is subjected to s independent constraints, and the number of degrees of freedom is δ If the system is subjected to δ independent driving constraints, the motion of the system will be uniquely determined by the hinge constraints and the driving constraints, and such a system is called a kinematically driven system. The corresponding problem is the kinematics analysis problem. If the system has a certain configuration and a specific initial condition under the action of external force, the dynamic response is determined. In this case, the analysis of the position, velocity and acceleration in the motion process of the system is called dynamic analysis. In this case, if the external force is independent of time, the static equilibrium position of the system can be solved, that is, the static equilibrium analysis problem.

[0075] For a system composed of N rigid bodies, the position of each rigid body is described by Cartesian coordinates based on Euler quaternions, and the total number of coordinates describing the position of the whole multi-body system is 9N. Obviously, these coordinates are not independent, in addition to the constraint equations of quaternions, there are constraint equations for each pair of adjacent rigid bodies, and the set of these equations generally constitutes a redundant constraint equation set. Therefore, Lagrange multipliers are introduced, and the dynamic equation of the whole system is derived according to the Lagrange equation with multipliers, which can be obtained as

[0076]

[0077] In the formula, Z is the generalized mass matrix; z is the force matrix; z I is the inertia force matrix; δ is the Lagrange multiplier matrix corresponding to the constraint equation; indicates the constraint condition; q is the generalized coordinate.

[0078] Finally, the calculation can be obtained, when N=9, it can exactly meet the design requirements, and the opening angle of the cover is 90-120℃, which can make the missile pass smoothly and realize the complete rebound of the reboundable petal body 3-1.

[0079] As can be seen, the embodiment provides a reusable launch box fragile cover, which has the following advantages:

[0080] Firstly, the reusable launch box fragile cover takes PMI / EPP / PU hard foam as the main material, and the upper and lower two layers are attached with carbon fiber-epoxy resin or glass fiber-epoxy resin prepreg skin, which greatly reduces the weight.

[0081] Second, the second fragile cover body is provided with a retaining net, so that the fragile cover product forms a whole.

[0082] Third, the fragile cover is provided with an elastomer such as PU, SBS, POE, etc. at a weak part under a large stress, and the fragile cover body is provided with a preset crack diverging around, and the scientific arrangement of the thin wall makes the whole fragile cover product meet the requirements of cracking along the stress groove and turning outwards to form an object channel, and the cover pieces do not fall off from the frame, and the cover pieces can rebound after the canister is discharged, so that the fragile cover can be reused.

[0083] The embodiment also provides a missile launching box comprising the reusable launching box fragile cover and the box body of any one of the embodiment 1 or the embodiment 2, since the reusable launching box fragile cover is used, the function of quickly opening and forming a missile channel during missile launching is realized, meanwhile, the automatic resetting capability of the fragile cover after opening is ensured, so that the reuse of the fragile cover is realized, and the maintenance cost of the missile launching system is greatly reduced, the missile launching box can make the fragile cover quickly respond and open when the impact force is received, meanwhile, the safety and reliability of the fragile cover during the opening process are ensured, and the safety hidden danger possibly caused by the traditional blasting opening cover is avoided.

[0084] In the embodiment, the cover frame 2 is coordinated with the box body, the pressing plate 3 and the interface of the fragile cover body 3, and the surface is subjected to anodic oxidation treatment, so that the fragile cover body has good mechanical properties and corrosion resistance.

[0085] In conclusion, the reusable launching box fragile cover is designed through the cover frame of the annular structure and the fragile cover body of the spherical structure, the fragile cover body is composed of a plurality of reboundable petals, reliable burst under the action of the impact or the engine gas flow is realized, meanwhile, the integrity and the recyclability of the fragile cover are ensured, in addition, the elastomer made of polyurethane, styrene-butadiene block copolymer or polyolefin and the light filler made of foamed plastic material are used, so that the reboundability and the lightweight characteristics of the fragile cover are further enhanced, the design of the N-shaped main stress groove optimizes the burst effect, the application of the sealing ring and the sealing glue improves the sealing performance of the whole, so that the fragile cover is not only suitable for various launching boxes, but also has good durability and safety.

[0086] The above embodiment is only one of the implementation manners capable of realizing the technical scheme of the utility model, the range of protection claimed by the utility model is not limited by the embodiment, and any changes, substitutions and other implementation manners easily thought of by any person skilled in the art within the technical range disclosed by the utility model are also included.

Claims

1. A reusable launch box frangible cover, characterized by, It comprises a cover frame (2), a breakable cover (3) and a pressing plate (4); the breakable cover (3) is connected with the cover frame (2) through the pressing plate (4); The breakable cover (3) comprises a top cover (3-5) and a plurality of resilient petals (3-1) with the same structure; The resilient petals (3-1) comprise an elastic body (3-2), a skin (3-3) and a light filler (3-4); The skin (3-3) is the outermost layer of the resilient petals (3-1), and the inner cavity is filled with the light filler (3-4); The elastic body (3-2) is arranged between the skin (3-3) and the light filler (3-4) at the top, and is located at the bending position of the resilient petals (3-1); The top cover (3-5) is connected with one of the resilient petals (3-1), and the top cover (3-5) is provided with a stepped surface, and the remaining resilient petals (3-1) are all overlapped on the stepped surface of the top cover (3-5); the outer surfaces of all the resilient petals (3-1) and the outer surfaces of the resilient petals (3-1) form a complete spherical surface structure.

2. The reusable launch box frangible cap of claim 1, wherein, The cover frame (2) adopts a ring structure, and the breakable cover (3) has a spherical surface structure as a whole; the outer edge of the breakable cover (3) is connected to the circumference of the cover frame (2) through the pressing plate (4).

3. The reusable launch box frangible cap of claim 1, wherein, The light filler (3-4) is made of foamed plastic material; the elastic body (3-2) is made of polyurethane, styrene-butadiene block copolymer or polyolefin material.

4. The reusable launch box frangible cap of claim 3, wherein, The foamed plastic material adopts polymethacrylimide, foamed polypropylene or polyurethane.

5. The reusable launch box frangible cap of claim 1, wherein, An N-shaped principal stress groove is arranged at the bottom of the bending position of the resilient petals (3-1) for being broken by the impact or the engine gas flow.

6. A reusable launch box frangible cap according to claim 1, wherein, A sealing ring (1) is arranged on the circumferential inner wall of the cover frame (2).

7. A reusable launch box frangible cap according to claim 1, wherein, The top cover (3-5) and the connected resilient petals (3-1) are connected by riveting or integrated forming.

8. A reusable launch box frangible cap according to claim 1, wherein, Sealing glue is applied between the connection of the cover frame (2), the breakable cover (3) and the pressing plate (4); sealing glue is applied between every two adjacent resilient petals (3-1); and sealing glue is applied between the connection of the resilient petals (3-1) and the top cover (3-5).

9. A reusable launch box frangible cap according to claim 1, wherein, The skin (3-3) is made of carbon fiber-epoxy resin or glass fiber-epoxy resin prepreg skin.

10. A launch box characterized by, It comprises a box body and a reusable launch box breakable cover connected with the box body, wherein the breakable cover is any one of the breakable covers in claims 1-9.

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