JPS6324400Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a muzzle exhaust smoke removal device for removing muzzle exhaust smoke during artillery firing.

[Prior art]

In general, observation of bullet impact during firing is considered very important for operational purposes and for obtaining information for correcting the firing angle of the second bullet.

Traditionally, observation of the point of impact during target shooting has been done visually using visible optical equipment, but with advanced equipment automatic observation using visible optical equipment, infrared optical equipment, or radar has been considered, and is now being put into practical use. .

Here, the method limited to visual observation is to capture the bullet reflection within the field of view of the visible optical system and trace its trajectory.
This is done by reading the deviation of the target aiming point and the fluorescent light using a reticle scale within the field of view. The basic disadvantage of this visual observation is that when there is almost no wind, the muzzle smoke obstructs the forward view of the gun, making it impossible to observe the bullet trajectory, and even in light wind conditions, the bullet flight time is In the case of short, high-velocity bullets, this is impossible to observe because the muzzle smoke hits the bullet before it dissipates.

Regarding the above-mentioned drawbacks, it has been found that if observation using a visible optical device is switched to observation using an infrared optical device, a considerable impact observation effect can be expected even in the presence of white smoke. However, such optical systems are very expensive, so they cannot be easily installed as attachments to ordinary firearms.

Therefore, the present applicant proposed an improvement plan in the patent application filed in 1982.
Proposed as No. 205686 ``Armored vehicle with gas guidance system''.

The feature of this device is that the gas (smoke) during firing is naturally released from the gas guide hole provided at the muzzle of the gun to the rear of the gun through a pipe using the pressure of the gas itself, thereby improving the visibility of the front of the gun. It is something that we try to maintain.

[Summary of the idea]

This invention was made to further improve the invention of the earlier application mentioned above, and when firing a gun, the rear seat force of the gun is used to actively drain the gas inside the gun through multiple holes provided at the muzzle. By suctioning,
Enhances the smoke exhaust effect on the outside of the front of the muzzle,
The purpose of this paper is to propose a device that uses the gun's restoring force to smoothly release gas to the rear of the gun.

[Example of idea]

Figure 1 is a sectional view showing one embodiment of this invention, in which 1 is a gun barrel, 2 is a bullet with a cartridge in the barrel chamber before firing, 3 is a bullet after passing through the muzzle, and 4 is a gun barrel 1
5 is a support that supports the gun barrel 1 via a muzzle 6 mechanically fixed to the gun barrel 1, and the gun barrel is rotatable with respect to the support with the muzzle 6 as an axis. It has a structure. A gas guide 7 is attached to the tip of the gun barrel and has a plurality of gas guide holes 8 for guiding high-pressure gas inside the gun barrel after the bullet 3 passes through the muzzle; 9 is connected to the gas guide hole 8. Multiple gas guide pipes are installed along the gun barrel and at the rear of the gun barrel. Reference numeral 10 denotes a gas suction hole into which a plurality of gas guide pipes 9 are integrated and then inserted near the support 5, and is installed to penetrate the structure of the gun breech 6.

Reference numeral 11 denotes a cylinder attached to the muzzle 6, which pairs with a piston 12 fixed to the gun barrel 1, operates as a gas suction device, and has a suction valve 1 in its structure.
3 and a discharge valve 14 for discharging the gas sucked into the cylinder. 15 is a discharge pipe for discharging the gas that has passed through the discharge valve 14 to the rear of the gun. 16 is a spring that attenuates the impact force applied to the gun barrel due to bullet firing against the support body 5;
It extends to a position that is balanced with the rear seat force of the gun barrel, and applies restoring force to the gun barrel as the rear seat force disappears.

The operation of the muzzle exhaust smoke removal device configured as described above will be further explained.

Generally, the relationship between firing impulse and time when firing a firearm varies depending on the gun and the bullet used, and an example is shown in Figure 2. As shown in Figure 2a, it has been experimentally determined that the firing impact reaches its maximum approximately 5 msec after the bullet is fired, and the elapsed time inside the gun during which the bullet remains inside the gun barrel is as shown in Figure 2b. A time period of 6 to 10 msec is also appropriate, and has been experimentally confirmed, in order to impart the maximum kinetic energy to the bullet after the maximum impact is generated. After that, the bullet shifts to a trajectory outside the gun, but it is thought that smoke exhaust of smoke gas toward the front of the gun begins 6 to 10 milliseconds after firing. Now, if we focus on the movement of the gun barrel due to the firing force, the second
As shown in Figure c, the bullet rapidly rears until the maximum impact is generated, and then gradually rears as the impact decreases, and from the moment the bullet passes through the muzzle, the bullet is applied to the gun barrel. The inertial force and the spring 16 in Figure 1
After sitting back until the force is balanced, spring 1
6, it will begin to sit back down, and after approximately 70 msec, it will come to rest at its original position. Therefore, in FIG. 1, since the piston 12 is fixed to the gun barrel 1, it moves in the same way as the gun barrel rearward and backward movement, and from the time the bullet passes through the gas guide hole 8, the gas guide The inside of the cylinder 11 exhibits a negative pressure until the bullet passes through the tip of the container 7. During this time, the smoke gas is actively sucked into the cylinder, and the discharge valve 14 and the discharge pipe 15 are opened using the receding motion. Gas can be discharged to the rear of the gun through the gun barrel 1. In other words, as the gun barrel 1 moves to the rear, the piston 12 moves in the direction of the rear seat movement and operates the suction valve 10. Gas flows through the gas guide hole 8,
Gas guide pipe 9, gas suction hole 10, absorption valve 13
is sucked into the cylinder 11 through. Thereafter, the piston 12 moves in the direction of the receding movement of the gun barrel 1, and the exhaust valve 14 is actuated.
4. It is discharged to the rear of the gun through the discharge pipe 15. The technical points of this device are the distance from the set position of the gas guide hole 8 to the tip of the gas guide 7;
The key is to appropriately allocate the time required for a bullet to pass through this distance, and the relationship between the rear seat length of the gun barrel and the point at which the bullet passes through the muzzle. For example, in the case of a bullet with a cartridge, the separation of the cartridge usually begins when it passes through the muzzle, so increasing the distance between the gas guide hole and the tip of the gas guide will affect the trajectory. Therefore, consideration must be given to this point.

[Effect of idea]

As explained above, this device is installed in a gas inductor with multiple gas guide holes at the tip of the gun barrel, and the smoke gas inside the gun barrel is actively sucked into the cylinder by using the back seat force of the gun barrel through a pipe. This has the effect of preventing the ejection of smoke gas toward the front of the gun and maintaining forward visibility when firing.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of this invention, and FIG. 2 is a diagram for explaining the firing impulse, time, and amount of movement of the gun barrel during firing. In the figure, 1 is a gun barrel, 2 is a bullet with a cartridge, 3 is a bullet after passing through the muzzle, 4 is a closing device, 5 is a support, 6 is a muzzle, 7 is a gas guide, 8 is a gas guide hole, 9 is a gas guide pipe, 10 is a gas suction hole, 11 is a cylinder, 12
is a piston, 13 is a suction valve, 14 is a discharge valve, 15
is a discharge pipe, and 16 is a spring.

Claims (1)

[Scope of utility model registration request] A gas inductor is attached to the outer periphery of the tip of the gun barrel and has multiple gas guide holes for guiding high-pressure gas inside the gun barrel after the bullet passes through the muzzle, and a gas inductor is attached to the breech and has a gas suction valve and gas A cylinder having a discharge valve is attached to the side of the gun barrel opposite to the muzzle, and is configured to operate the suction valve as the gun barrel moves backward, and operate the discharge valve as the gun barrel moves back. A gas suction device consisting of a piston that reciprocates in the cylinder by the rearward and reverse movement of the gun barrel, a gas guide pipe that connects the gas guide hole of the gas guider and the suction valve, and a gas guide pipe that connects to the discharge valve. 1. A muzzle exhaust smoke removal device comprising: a discharge pipe for discharging the gas sucked by the gas suction device to the rear of the gun.