Fragile cover

Abstract

The utility model discloses a fragile cover which comprises a cover edge, and the cover edge is connected with a cover body of the fragile cover. A sealing strip is arranged on the inner side of the cover edge, and a flange pressing plate is arranged on the outer side; fragile grooves are formed in the periphery and the interior of the fragile cover body respectively. The fragile cover body is in the shape of a prismatic table, and the included angle between the edge and the upper bottom edge is a round angle. And the cover edge is connected with the sealing strip through an adhesive. The fragile cover body, the flange pressing plate and the sealing strip are installed on the end face of the missile launching box through standard parts, and therefore the overall sealing performance of the launching box can be achieved. The *-shaped fragile grooves with different depths on the inner side of the fragile cover body can enable the fragile cover to be easily broken in the forward direction, and the fragile cover can bear certain forward pressure and enough reverse force. The manufacturing technology involved in the utility model is simple to operate, can meet the requirements of most launch boxes, and has a wide application range.

Description

A fragile lid Technical Field

[0001] This utility model relates to the field of rear cover technology for launch boxes, and in particular to a fragile cover. Background Technology

[0002] Tactical missile canister launchers can effectively extend the service life of missiles on standby inside the canister and shorten missile reaction time. When launching missiles from a canister, the canister cover should be reliably opened and locked, ensuring that missile flight and wing deployment are not interfered with. Currently, foreign launch canister covers are generally of the throw-out or open type. Throw-out and open type launch canister covers have complex structures. They have poor safety and reliability, and explosive opening can easily damage the missile. If the missile's own energy during launch is used to break through the front cover of the launch canister, the structure of the front cover will be simplified, making it safer and more reliable to use. When missiles are stored in the launch canister, they need to be filled with a protective gas at a certain pressure. Therefore, the canister cover should be easily broken in the forward direction but able to withstand a certain amount of forward pressure. In addition, when missiles in adjacent canisters of a multi-launcher are launched, the exhaust plume of the adjacent missile exerts a significant impact pressure on the canister cover. The canister cover should have sufficient reverse pressure resistance to prevent it from being shattered by the exhaust plume of the adjacent missile.

[0003] Currently, the fragility caps that are commonly found have very poor control over their breakage surface due to the influence of manufacturing processes and structural design. In severe cases, this can lead to irregular breakage surfaces and large ejected fragments, posing a potential hazard during aircraft launch and potentially causing casualties. Summary of the Invention

[0004] The purpose of this invention is to solve the above problems by proposing a fragile cover that is easily broken in the forward direction, can withstand a certain amount of forward pressure, and can also withstand sufficient reverse force.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fragile lid includes a lid edge connected to a fragile lid body; the inner side of the lid edge is provided with a sealing strip, and the outer side is provided with a flange pressure plate;

[0007] The fragile cover has fragile grooves on its periphery and inside.

[0008] The fragile cap is shaped like a frustum, and the angle between the "edge" and the "top bottom edge" is rounded.

[0009] The cover edge and the sealing strip are connected by adhesive.

[0010] The cover edge and flange pressure plate are fastened to the end face of the launch box by bolts to ensure overall sealing performance.

[0011] The frangible groove includes a "mouth"-shaped frangible groove and a "rice"-shaped frangible groove.

[0012] A "mouth"-shaped frangible groove is provided around the periphery of the cover body of the frangible cover.

[0013] A "rice"-shaped frangible groove is provided inside the cover body of the frangible cover.

[0014] The frangible groove has a "V" shape with a rounded bottom for transition, which can achieve a relatively large reverse bearing capacity without significantly increasing the pressure for forward cover breaking. [[ID=J11]]

[0015] The flange pressing plate has a square structure, with a reinforcing steel plate installed inside and a silicone rubber strip sleeved outside.

[0016] The sealing strip is in an "E" shape to achieve a better sealing effect.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. The cover body of the frangible cover, the flange pressing plate, and the sealing strip are installed on the end face of the missile launch box through standard parts, thereby realizing the overall sealing of the launch box.

[0019] 2. The "rice"-shaped frangible grooves with different depths on the inner side of the cover body of the frangible cover can make the frangible cover easily break forward, withstand a certain forward pressure, and at the same time be able to withstand sufficient reverse force.

[0020] 3. The manufacturing technology involved in the present utility model is simple in operation, can meet the needs of most launch boxes, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a side view of the present utility model;

[0022] FIG. 2 is a front view of the present utility model;

[0023] FIG. 3 is a cross-sectional structural schematic diagram of the flange pressing plate of the present utility model;

[0024] FIG. 4 is a cross-sectional structural schematic diagram of the sealing strip of the present utility model;

[0025] FIG. 5 is an overall structural schematic diagram of the front of the present utility model;

[0026] FIG. 6 is an overall structural schematic diagram of the back of the present utility model;

[0027] In the figure, 1 - sealing strip, 2 - flange pressing plate, 3 - cover body of the frangible cover, 4 - "rice"-shaped frangible groove, 5 - "mouth"-shaped frangible groove, 6 - silicone rubber strip, 7 - steel plate, 8 - cover edge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0029] A frangible cover, as shown in FIGS. 1-6, includes a cover edge 8 which is connected to the frangible cover body 3; a sealing strip 1 is provided on the inner side of the cover edge 8, and a flange pressing plate 2 is provided on the outer side; the sealing strip 1 and the frangible cover body 3 are connected by an adhesive, and the flange pressing plate 2 and the frangible cover body 3 are fixedly connected to the end face of the launch box by bolts.

[0030] As shown in FIGS. 1 and 6, the frangible cover body 3 is in a "frustum shape", and the angle between the "edge" and the "upper base" is rounded.

[0031] As shown in FIG. 3, the flange pressing plate 2 is of a square structure, and a reinforcing steel plate 7 is installed inside it, and a silicone rubber strip 6 is sleeved outside it to meet the needs of most launch boxes.

[0032] As shown in FIGS. 2 and 5, different-depth "cross-shaped" frangible grooves 4 are made on the inner side of the frangible cover body 3. The cross-section of the cross-shaped frangible groove is a "V" shape, and the bottom of the cross-shaped frangible groove has a rounded transition, so as to achieve a relatively large reverse bearing capacity without significantly increasing the pressure for breaking the cover in the forward direction.

[0033] As shown in FIGS. 2 and 5, an "open-shaped" frangible groove 5 with the same depth as the cross-shaped frangible groove 4 is made along the flange edge on the inner side of the frangible cover body 3. The cross-section of the open-shaped frangible groove is a "V" shape, and the bottom of the open-shaped frangible groove has a rounded transition.

[0034] The corners of the cover edge 8 and the flange pressing plate 2 are rounded.

[0035] The sealing strip 1 is bonded to the inner side of the cover edge 8.

[0036] The flange pressing plate 2 is connected to the outer side of the cover edge 8 by bolts.

[0037] As shown in FIG. 4, the sealing strip is in an "E" shape to achieve a better sealing effect.

[0038] The front side shown in FIG. 5 faces the launch box. The assembled "frangible cover" as shown in FIG. 1 is installed on the test tooling, and the tooling is slowly inflated to make the inner surface of the cover bear pressure. When the rear end cover body breaks, read the internal opening strength; the tooling is slowly inflated to make the outer surface of the rear end cover bear pressure until it meets the requirements for the external pressure-bearing capacity of the rear end cover.

[0039] Verified by the test, the "frangible cover" product shown in FIG. 1 meets the internal opening strength and external pressure-bearing capacity indicators. When the frangible cover body bears the internal pressure and opens, it breaks into 8 pieces. When the frangible cover body bears the external pressure, it is not damaged.

[0040] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A fragile lid, characterized in that, It includes a cover edge, and the cover edge is connected to the frangible cover body; a sealing strip is provided on the inner side of the cover edge, and a flange pressing plate is provided on the outer side; frangible grooves are provided on the periphery and inside of the frangible cover body respectively; the frangible grooves include a "square" - shaped frangible groove and a "cross" - shaped frangible groove, the "square" - shaped frangible groove is provided on the periphery of the frangible cover body; the "cross" - shaped frangible groove is provided inside the frangible cover body; the sealing strip is in an "E" shape.

2. The fragile lid as described in claim 1, characterized in that, The frangible cover body is in a "frustum - shaped" form, and the included angle between the "edge" and the "upper base" is a rounded corner.

3. A fragile lid as described in claim 1, characterized in that, The cover edge and the sealing strip are connected by an adhesive.

4. A fragile lid as described in claim 1, characterized in that, The cover edge and the flange pressing plate are firmly connected to the end face of the launch box through bolts.

5. A fragile lid as described in any one of claims 1-4, characterized in that, The cross - section of the frangible groove is in a "V" shape with a rounded - corner transition at the bottom.

6. A fragile lid as described in any one of claims 1-4, characterized in that, The flange pressing plate is of a square structure, with a reinforcing steel plate installed inside and a silicone rubber strip sleeved outside.

7. A fragile lid as described in any one of claims 1-4, characterized in that, The corners of the cover edge and the flange pressing plate are rounded.

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