Fuse safety device based on air pressure difference

Abstract

The invention discloses a fuse safety device based on air pressure difference. A first step through hole and a second step through hole are longitudinally arranged in the shell of the safety device; a switch bayonet lock through hole is arranged in the shell along the axial direction; the switch bayonet lock through hole is simultaneously communicated with the small hole ends of the first step through hole and the second step through hole; a piston is arranged in the first step through hole, and a piston rod is provided with an annular groove; a sliding push rod is arranged in the second stepthrough hole and is provided with an annular clamping groove; the bottom of the push rod is fixed by a spring; the outer wall of the push rod is provided with a conducting ring; the inner wall of each step through hole is provided with a spring piece; a switch bayonet lock is installed between the two step through holes in the switch bayonet lock through hole; one end of the switch bayonet lock abuts against the annular groove; and the other end of the switch bayonet lock is clamped with the annular clamping groove. According to the invention, air pressure is reduced with the increase of height, the piston moves under the action of the pressure difference so as to switch on the switch bayonet block, and then the conducting ring and the spring piece contact to be conducted to generate switching change information so as to realize the switching function of fuse safety device.

Description

technical field [0001] The invention relates to a safety insurance device for an electromechanical fuze, in particular to a safety insurance device for a fuze based on air pressure difference. Background technique [0002] The fuze, also known as the fuse tube, is a detonating device mounted on shells, bombs, mines, etc. A fuze is a control device or system that uses target information and environmental information to detonate or ignite ammunition under predetermined conditions. The fuze safety device is an important part of the fuze, which has dual functions - insurance and release. Insurance is the performance of the fuze to ensure that it will not ignite under any circumstances other than the scheduled time or place for igniting. It is also called the safety performance of the fuze. The fuze is not safe. Not only can it not hit the target accurately, but it may cause harm to its own side. Releasing the insurance is exactly at a certain point of the trajectory, the fuze ...

AI Technical Summary

Problems solved by technology

[0003] At present, the safety devices used for electromechanical fuzes generally use electromagnetic locking mechanisms, gunpowder actuators, or torque motors. When the environmental conditions available on the trajectory are few and relatively simple, the setting of safety devices will restrict the overall development of the fuze.

Using the electromagnetic locking mechanism alone can no longer satisfy the safety of the service handling when it falls, and there are problems of excessively high working voltage and mutual adhesion between moving parts after long-term vibration

The gunpowder actuator uses the high-temperature and high-pressure gas generated by the combustion of gunpowder to push the piston to do work. It is not only inconvenient to control, but also not suitable for environmental changes, and its scope of application is small.

In addition, gunpowder actuators are expensive, which is not conducive to vigorously promoting their use

When using a torque motor, when the load increases, the speed of the motor can automatically decrease accordingly, while the output torque increases to maintain a balance with the load. However, due to the high rotor resistance, the loss is large, and the heat generated is also large. Therefore, the motor in the rear An independent axial flow or centrifugal fan is installed on the end cover for heat dissipation, adding an additional device

Therefore, the installation of torque motors requires a large space, and the operation is inconvenient, which is not conducive to popularization and use.

Images