Impact-resistant launch box breakable front cover

Abstract

The application discloses an anti-impact type launch box fragile front cover, which comprises an end frame, a main body fragile cover arranged on the end frame, a pressing plate arranged on the edge of the main body fragile cover, a protection cover arranged above the main body fragile cover, and a fixing bolt arranged to fixedly connect the pressing plate with the end frame through the main body fragile cover, wherein a split cover structure is arranged between the main body fragile cover and the end frame, and the split cover structure is used for reducing the internal pressure and improving the external pressure bearing capacity; the split cover structure can significantly improve the external pressure bearing limit while reducing the internal pressure bearing limit.

Description

Technical Field

[0001] This invention relates to the field of launch box fragile cover technology, specifically to an impact-resistant launch box fragile front cover. Background Technology

[0002] The front cover of the multi-launcher canister serves as a sealing cover for the launch device, creating a closed space to prevent sand, dust, and other foreign matter from entering the canister. It must also withstand the loads during loading, lifting, transportation, and drops. During launch, the front cover opens rapidly, opening the launch channel, and adjacent canister covers must withstand the impact loads from the exhaust gases of adjacent missiles. Therefore, the front cover of the multi-launcher canister should possess the ability to efficiently burst under internal pressure impact and reliably withstand external pressure impact.

[0003] Currently, most cap opening methods both domestically and internationally employ gas flow shock wave opening. Under conditions of a sudden increase in internal pressure, the cap breaks apart in a predetermined four-part pattern, while simultaneously requiring high external pressure bearing capacity. Therefore, how to reduce internal pressure while increasing external pressure bearing capacity is a major existing challenge. Some fragile caps utilize the anisotropic properties of composite materials to solve this problem, but this brings about high costs and long manufacturing cycles. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an impact-resistant, fragile front cover for a launch box.

[0005] The present invention is achieved through the following technical solutions.

[0006] The technical solution of the present invention is as follows: an impact-resistant launch box fragile front cover, including an end frame, a main fragile cover provided on the end frame, a pressure plate installed on the edge of the main fragile cover, a protective cover installed on the top of the main fragile cover, the pressure plate being fixedly connected to the end frame by a fixing bolt passing through the main fragile cover, and a split cover structure being provided between the main fragile cover and the end frame, the split cover structure being used to reduce internal pressure and improve the bearing capacity of external pressure.

[0007] Preferably, the main fragile cover is composed of an arc-shaped structural part and a frame part, with the frame part overlapping the end frame and the arc-shaped structural part fitting onto the split cover structure.

[0008] Preferably, the split cover structure includes a first split fragile cover and a second split fragile cover. The second split fragile cover is mounted on the end frame, the first split fragile cover is mounted on the second split fragile cover, and the main fragile cover is sleeved on the first and second split fragile covers. The outer surface of the second split fragile cover is in contact with the inner surface of the main fragile cover.

[0009] Preferably, the second split fragile cover is composed of four arc-shaped plates, which together form an arched space. A connecting plate is fixedly connected to the lower end of the arc-shaped plates, and the connecting plate is installed on the end frame. An overlapping plate is fixedly connected to the upper end of the arc-shaped plates, and the four overlapping plates together form a perforation.

[0010] Preferably, the first split fragile cover has raised edges around its perimeter, with the four raised edges overlapping the four overlapping plates respectively, and the first split fragile cover is located at the perforation.

[0011] Preferably, the first split fragile cover has a through hole in the middle.

[0012] Preferably, a sealing gasket is provided at the bottom of the end frame.

[0013] Preferably, the outer surface of the arc-shaped structure is provided with an annular weakening groove.

[0014] Preferably, the protective cover is made of metal.

[0015] Preferably, the second split fragile cover shown is made of rigid polyurethane foam.

[0016] The beneficial effects of the present invention are: 1. By setting the main body fragile cover and the split cover structure, the internal pressure bearing limit can be reduced while the external pressure bearing limit can be significantly improved; 2. By using sealing gaskets and various bolts for reinforcement, the overall airtightness of the structure is enhanced, which to a certain extent isolates the impact of external conditions on the aircraft inside the box; 3. The second split fragile cover is made of rigid polyurethane foam, which has the advantages of low cost and short production cycle compared with composite materials. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the end frame structure in this invention; Figure 4 This is a schematic diagram of the pressure plate in this invention; Figure 5 This is a schematic diagram of the structure of the main fragile cover in this invention; Figure 6 This is a schematic diagram of the split-type cover structure in this invention; Figure 7 This is a schematic diagram of the structure of the protective cover in this invention; Figure 8 This is an exploded view of the present invention.

[0018] Reference numerals: 1-End frame; 101-Groove; 102-First threaded hole; 103-Double-ended threaded hole; 2-Pressure plate; 201-Fourth threaded hole; 202-Second anti-loosening thread mounting hole; 203-Second non-loosening bolt hole; 3-Main body fragile cover; 301-Arc-shaped structure part; 302-Frame part; 303-Annular weakening groove; 304-Second threaded hole; 4-First split fragile cover; 401-Protruding edge; 402-Through hole; 5-Second split fragile cover; 501-Arc-shaped plate; 502-Connecting plate; 503-Overlapping plate; 504-Third threaded hole; 6-Protective cover; 601-First anti-loosening thread mounting hole; 602-First non-loosening bolt hole; 7-Sealing gasket; 8-Double-ended bolt; 9-Non-loosening bolt; 10-Anti-loosening bolt; 11-Fixing bolt. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] In this embodiment, refer to Figure 1 , Figure 3 and Figure 8 The device includes an end frame 1 with a double-ended threaded hole 103 at the bottom of the port. A double-ended bolt 8 is installed in the double-ended threaded hole 103 to fix the end frame 1 to the launch box. The end frame 1 is equipped with a main body fragile cover 3, which is made of rigid polyurethane foam. A pressure plate 2 is installed on the edge of the main body fragile cover 3. A protective cover 6 is also installed on the top of the main body fragile cover 3. The pressure plate 2 is fixedly connected to the end frame 1 by a fixing bolt 11 passing through the main body fragile cover 3. A split fragile cover structure is provided between the main body fragile cover 3 and the end frame 1. The split fragile cover structure is used to reduce internal pressure and improve the bearing capacity of external pressure.

[0022] In this embodiment, refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8An L-shaped groove is provided on the end frame 1. The edges of the main fragile cover 3, the split fragile cover structure and the pressure plate 2 are sequentially overlapped and installed in the L-shaped groove. The end frame 1, the main fragile cover 3, the split fragile cover structure and the pressure plate 2 are respectively provided with a first threaded hole 102, a second threaded hole 304, a third threaded hole 504 and a fourth threaded hole 201. The fixing bolt 11 passes through the fourth threaded hole 201, the third threaded hole 504, the second threaded hole 304 and the first threaded hole 102 in sequence, so that the pressure plate 2 fixes the main fragile cover 3 and the split fragile cover structure on the end frame 1.

[0023] In this embodiment, refer to Figure 3 and Figure 8 The bottom of the end frame 1 has a groove 101, and a sealing gasket 7 is installed in the groove 101. The end frame 1 and the launch box body are fixedly connected by double-headed bolts 8. The sealing gasket 7 is used to enhance the sealing at the joint between the launch box body and the end frame 1.

[0024] In this embodiment, refer to Figure 2 , Figure 4 and Figure 8 The protective cover 6 is installed above the pressure plate 2. The protective cover 6 is made of metal and has a first anti-loosening threaded mounting hole 601 and a first non-loosening bolt hole 602. The pressure plate 2 has a second anti-loosening threaded mounting hole 202 and a second non-loosening bolt hole 203. Anti-loosening bolts 10 are passed through the first anti-loosening threaded mounting hole 601 and the second anti-loosening threaded mounting hole 202 in sequence, and non-loosening bolts 9 are passed through the first non-loosening bolt hole 602 and the second non-loosening bolt hole 203 in sequence, so as to fix the protective cover 6 and the pressure plate 2, thereby enhancing the stability of the structure; avoiding damage to the front and rear covers from accidental collisions during transportation and lifting, and also enabling quick installation and removal of the protective cover 6.

[0025] In this embodiment, refer to Figure 5 The main body of the fragile cover 3 is composed of an arc-shaped structural part 301 and a frame part 302. The frame part 302 overlaps in the L-shaped groove, and the arc-shaped structural part 301 is fitted on the split fragile cover structure. The thickness of the main body of the fragile cover 3 gradually increases from the center position to the frame part 302 position to improve the external pressure bearing capacity.

[0026] In this embodiment, refer to Figure 5 The outer surface of the arc-shaped structure 301 is provided with an annular weakening groove 303. There are two annular weakening grooves 303, which are intersecting. The main body fragile cover 3 is broken regularly by pre-scribing lines to ensure that the main body fragile cover 3 breaks into 4 pieces regularly under internal pressure. At the same time, the break at the connection position of the arc-shaped structure 301 and the four sides of the frame 302 is neat and there are no residues at the four corners.

[0027] In this embodiment, refer to Figure 6The split fragile cover structure includes a first split fragile cover 4 and a second split fragile cover 5. The second split fragile cover 5 is installed on the end frame 1, the first split fragile cover 4 is installed on the second split fragile cover 5, and the main fragile cover 3 is sleeved on the first split fragile cover 4 and the second split fragile cover 5. The outer surface of the second split fragile cover 5 is in contact with the inner surface of the main fragile cover 3. The second split fragile cover 5 is composed of four arc-shaped plates 501, which together form an arched space. A connecting plate 502 is fixedly connected to the lower end of the arc-shaped plates 501, and the connecting plate 502 is installed in an L-shaped groove. An overlapping plate 503 is fixedly connected to the upper end of the arc-shaped plates 501, and the four overlapping plates 503 together form a through hole. The first split fragile cover 4 has protruding edges 401 around its perimeter, and the four protruding edges 401 overlap the four overlapping plates 503 respectively. The first split fragile cover 4 is located at the through hole.

[0028] By installing a first split fragile cover 4 and a second split fragile cover 5 inside the main fragile cover 3, the bearing limit against external pressure is strengthened. At the same time, the use of a distributed split fragile cover structure can also effectively reduce the bearing limit of internal pressure.

[0029] In this embodiment, refer to Figure 6 The first split fragile cover 4 has a through hole 402 in the middle, which helps to reduce the bearing limit of internal pressure.

[0030] In this embodiment, the first split fragile cover 4 is made of rigid polyurethane foam, which has the characteristics of low cost and short production cycle.

[0031] The working principle of this invention is as follows: The end frame 1 is connected to the launch box body, and the sealing gasket 7 is used to achieve the sealing of the connection between the end frame 1 and the launch box body. Then, through the main fragile cover 3, the first split fragile cover 4 and the second split fragile cover 5, the external pressure bearing limit of the launch box body is increased and the internal pressure bearing limit of the launch box is decreased. The difference between the internal pressure bearing limit and the external pressure bearing limit is widened, which can achieve efficient bursting under internal pressure impact and reliable pressure bearing under external pressure impact. It has the characteristics of low cost and short manufacturing cycle.

[0032] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fragile front cover for an impact-resistant launch box, characterized in that: Includes an end frame (1), on which a main fragile cover (3) is provided, and a pressure plate (2) is installed on the edge of the main fragile cover (3). A protective cover (6) is also installed on the top of the main fragile cover (3). The pressure plate (2) is fixedly connected to the end frame (1) through the main fragile cover (3) by fixing bolts (11). A split cover structure is provided between the main fragile cover (3) and the end frame (1). The split cover structure is used to reduce internal pressure and improve the bearing capacity of external pressure.

2. The impact-resistant launch box fragile front cover according to claim 1, characterized in that: The main fragile cover (3) is composed of an arc-shaped structure (301) and a frame (302). The frame (302) overlaps on the end frame (1), and the arc-shaped structure (301) is fitted onto the split cover structure.

3. The impact-resistant launch box fragile front cover according to claim 1, characterized in that: The split cover structure includes a first split fragile cover (4) and a second split fragile cover (5). The second split fragile cover (5) is installed on the end frame (1), the first split fragile cover (4) is installed on the second split fragile cover (5), and the main fragile cover (3) is sleeved on the first split fragile cover (4) and the second split fragile cover (5). The outer surface of the second split fragile cover (4) is in contact with the inner surface of the main fragile cover (3).

4. The impact-resistant launch box fragile front cover according to claim 3, characterized in that: The second split fragile cover (5) is composed of four arc-shaped plates (501). The four arc-shaped plates (501) together form an arched space. A connecting plate (502) is fixedly connected to the lower end of the arc-shaped plate (501). The connecting plate (502) is installed on the end frame (1). An overlapping plate (503) is fixedly connected to the upper end of the arc-shaped plate (501). The four overlapping plates (503) together form a perforation.

5. The impact-resistant launch box fragile front cover according to claim 4, characterized in that: The first split fragile cover (4) has raised edges (401) around its perimeter. The four raised edges (401) overlap the four overlapping plates (503) respectively. The first split fragile cover (4) is located at the perforation.

6. The impact-resistant launch box fragile front cover according to claim 3, characterized in that: The first split fragile cover (4) has a through hole (402) in the middle.

7. The impact-resistant launch box fragile front cover according to claim 1, characterized in that: A sealing gasket (7) is provided at the bottom of the end frame (1).

8. The impact-resistant launch box fragile front cover according to claim 2, characterized in that: The outer surface of the arc-shaped structure (301) is provided with an annular weakening groove (303).

9. The impact-resistant launch box fragile front cover according to claim 1, characterized in that: The protective cover (6) is made of metal.

10. The impact-resistant launch box fragile front cover according to claim 3, characterized in that: The second split fragile cover (5) is made of rigid polyurethane foam.

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