A low-impact high-load pyrotechnic unlocking bolt

Abstract

A low-impact and high-bearing-capacity pyrotechnics release bolt comprises an inner barrel (3) and the like. One end of the inner barrel (3) penetrates through a cellular component (4) installed at the bottom of an external separation body. The other end of the inner barrel (3) is cylindrical and installed in an outer barrel (8). A slide rod (6) is installed inside the cylindrical end of the inner barrel (3). One end of the slide rod (6) is fixedly connected with the side wall of the inner barrel (3) through a shear pin (5) which is radially inserted into the slide rod (6). Wedges (7) penetrate through the side wall of the inner barrel (3) to be inserted into the inner wall of the outer barrel (8) and are located between the slide rod (6) and the outer barrel (8). A piston (9) is installed in the outer barrel (8). An explosive shell (14) is installed in the end, not connected with the inner barrel (3), of the outer barrel (8). An explosive stop plate (12) is installed in the end port, connected with the outer barrel (8), of the explosive shell (14). An explosive box (11) is installed in the explosive shell (14). Igniters (15) are installed on the explosive shell (14). The low-impact and high-bearing-capacity pyrotechnics release bolt has the characteristics of high bearing capacity and low impact; and meanwhile, no pollution or redundant matter is generated in the working process.

Description

technical field [0001] The invention relates to an unlocking bolt. Background technique [0002] The pyrotechnic unlocking bolt is a commonly used pyrotechnic device on satellite spacecraft and missile weapons. With the advancement of technology, the application of precision instruments is becoming more and more extensive, and the low impact requirements for pyrotechnic unlocking bolts are getting higher and higher. In 2006, Zhang Feng et al. in "Design of a Low-Impact Separation Bolt" (Zhang Feng, Yang Shubin, Yang Anmin, Wu Ruide. Design of a Low-Impact Separation Bolt [J]. Pyrotechnics, 2006, (3) :14~22.) proposed a low-impact unlocking bolt design, the unlocking bolt adopts a common steel ball structure, which can reach a bearing capacity of 41.16kN, compared with the detonation wave generated by the explosion to achieve the separation of the explosion bolt It is said that it is a low-impact unlocking bolt, and it is not designed for low-impact itself. In 2011, Ye Yaok...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing unlocking bolts have an axial bearing capacity of more than 40kN, and no impact reduction measures are taken. Compared with traditional explosive bolts, the impact level is lower; the unlocking bolts with smaller bearing capacity have a bearing capacity of less than 20kN. The impact is reduced only by reducing the mass of the inner cylinder and reducing the charge, which cannot be used to achieve low impact on high-load unlocking bolts

[0004] The quality of the inner cylinder is limited by the strength of the connection force. When the connection force is small, the quality of the inner cylinder can be reduced, but it cannot be achieved when the connection force is large.

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