JP3192181B2 - Unit-type propellant charge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit-type separate charge propellant for artillery such as a cannon.

[0002]

2. Description of the Related Art Conventionally, a propellant charge has been used in which a sack filled with a propellant is called a medicine bag. In recent years, however, a solid material having a burn-out property has been used instead of a sack.
Fr-1614293 proposes a charge that includes a hollow portion area and combines the unit charges at the male and female parts.

[0003] Furthermore, a unit-type propellant charge comprising a plurality of easy-to-handle modules having the same weight and the same shape, which are completely symmetrical with respect to the axial direction and the mirror surface, including a hollow portion area, is used. Japanese Patent Publication No. 62-31276 proposes DE as a means for connecting this module.
No. 3,737,704 is known.

[0004] Further, as a means for eliminating the displacement of the axis of the hollow portion caused when a charge is loaded into a gun, DE-31340 is disclosed.
6 are known.

[0005]

However, Fr-1
614293 provides a hollow section at the center axis of the propellant charge,
The fact that the male part and the female part are joined is an epoch-making process, but there is no device for igniting the fuel to simultaneously ignite the stacked charges.

Japanese Patent Publication No. Sho 62-31276 discloses a technique of arranging an igniter in a hollow portion as means for simultaneously igniting a plurality of charges.
In the method of combining each unit charge according to 3737704,
Not only does the bond disengage in the early stage of combustion, preventing the simultaneous firing of the unit charge, but it also has poor operability due to the use of special parts for the connection, and furthermore, there are constricted areas on both end faces. Finally, the preloaded charge
Usually, it cannot be locked by the stopper in the gun barrel in the upward direction, and has a drawback of slipping down.

[0007] Further, neither of them has a device for solving the deviation of the axis from the fire tube which occurs when the tube is loaded into the medicine chamber.

[0008] DE designed to eliminate the deviation of the axis
In the structure of -31346, since the funnel-shaped guide member is provided inside the medicine pack, the amount of the propellant for this space is reduced, and it is not possible to apply the present invention to a charge that is used by stacking units. Very difficult in practice.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a large number of stacked units which can be easily handled without trouble and can be safely and reliably loaded by manual loading by manual power or automatic loading by mechanical power. It is an object of the present invention to provide a unit-type charge which can ignite the charge almost simultaneously and can secure a desired range without breaking off the connection at the beginning of combustion.

[0010]

As a result of intensive studies, the present inventor has devised a connecting structure at both ends of a unit-type propelling charge comprising a hollow cylindrical container, and has an inner diameter, an outer diameter, and a firearm. By choosing the relationship between the room diameter,
The inventors have found that the above-mentioned problems can be solved, and have reached the present invention.

That is, the present invention is a unit-type propellant charge in which a propellant is filled in a cylindrical container made of a burnout material and having openings at the center of both end surfaces, wherein the container has a male end on one end surface side. On the other end side, a female end to which the male end of another unit type propellant can be fitted is formed so as to be integrally formed, and only the male end and the female end are formed.
By the fact that as each unit are coupled, further end surface central axis and the inner diameter coaxially of said vessel (d) is 10 to 4
0 mm constitutes an inner surface of the container, an ignition cartridge holding an igniter is provided on the inner surface thereof, and the sum of the outer diameter (D) of the cylindrical container and the inner diameter (d) of the igniter cylinder is determined by the firearm chamber. Beyond the inner diameter (A), the Young's modulus of the female end is 100 to 2
Set 00kg / mm ^2, the separating by the ignition impact during shooting the male end of another unit type propelling charge
This is a unit-type propellant charge that can be connected by fitting with a peeling force of 5 kgf or more.

FIG. 1 is a sectional explanatory view of a unit-type propellant charge according to the present invention, which will be described in a first embodiment described later. FIG.
Among them, 1 is a cylindrical container, 1a and 1b are ends thereof, 2 is an ignition cartridge, 3 is an opening, 4 is an ignition charge, and 5 is a propellant. As shown in FIG. 1, the burnable cylindrical container used in the present invention has an opening 3 at the center of both end faces, and further comprises an ignition cartridge constituting a hollow inner surface of the cylindrical container extending from both openings. 2 The burnout container is filled with propellant 5, and
An ignition charge 4 is held on the inner surface of the ignition charge cylinder. This igniter ignites the propellant by igniting with a fire tube facing the end of the chamber of the gun.

The burnable material of the container used in the present invention is composed of pulp, nitrocellulose, a binder and the like. Nitrocellulose having a nitrogen content of 12.0 to 13.4% is used. Particularly preferred.

The inner diameter d of the ignition cartridge is in the range of 10 to 40 mm. The outer diameter D of the cylindrical container containing the propellant and the diameter A of the gun chamber of the gun in which the propellant is loaded are defined as follows. Are set so as to maintain the relationship of d + D> A.

Usually, a unit-type propellant charge is connected to a plurality of charges corresponding to a range and loaded into a gun as a set. In this case, the bonding strength of each unit is important. If this bonding force is weak and the connection is released due to the impact at the time of loading on the gun or ignition after loading, the ignition of each unit propellant, the combustion state will not be uniform, and a differential pressure will occur in the medicine chamber, Not only does it fail to deliver the thrust as designed, but it can even damage the barrel and even destroy it in extreme cases.

FIGS. 4 and 5 are diagrams schematically showing changes in pressure at the time of ignition of the pressure P ₂ at the front end and the pressure P _{1 at} the rear end of the unit charge in the barrel. FIG. Describes the case where the unit charge is ignited and the combustion state is not uniform due to the disconnection of the unit charge, for example, and a differential pressure is generated in the medicine chamber.

In the present invention, in order to avoid such a problem of the unit-type propellant charge, male and female ends are provided in a cylindrical container constituting the unit, and the units are connected by fitting means. In addition, the Young's modulus of the female end is set to 100 to 200 k in order to secure a predetermined bonding force.
g / mm ² , and the male end is fitted with a peeling force of 5 kgf or more. The coupling force can be adjusted by adjusting the inner diameter of the female end and the outer diameter of the male end, or increasing the thickness of the female end.

According to the present invention, the inner diameter (d) constituting the inner surface of the cylindrical container coaxially with the center axis of the end surface is 10 to 40.
mm, an ignition cartridge is installed on the inner surface of the ignition cartridge, and the sum of the outer diameter (D) of the columnar container and the inner diameter (d) of the ignition cartridge exceeds the internal diameter (A) of the gun cartridge. So I set
As shown in FIG. 2, the axis of the fire tube fits securely in the hollow part of the ignition cartridge of the unit-type propellant charge in the gun closing machine, and the deviation from the axis can be eliminated. As a result, the flames emitted by the fire tubes when stacking and firing unit charges,
Reaching to the unit charge at the leading end, the ignition charge of each unit is ignited, and the stacked units can be ignited almost simultaneously, which is generated in the gun charge chamber as shown in FIG. Differential pressure can be suppressed.
As described above, the cylindrical container constituting the unit-type propellant charge of the present invention has a male end on one end surface and a female end on the other end surface, and the rigidity of the female end is 100.
Since the pressure is set to ~ 200 kg / mm ² , the inner diameter of the female end does not expand or break due to the impact of knitting or transportation, and the units can be securely connected to each other. . In addition, since the female end is securely caught by the charge stopper provided in the gun, there is no fear of slipping off when the charge is loaded, and the proper position can be maintained. Furthermore, since no special tools are used to connect the units,
Not only can the number of parts of the charge be reduced, but also the knitting can be performed by one operation, and the automatic loading by mechanical as well as the manual loading can be easily performed.

Further, since the coupling force between the units is set to 5 kgf or more, the coupling is not released during the initial combustion of the charge, so that the stacked units are ignited almost simultaneously.

By forming a groove or a protrusion on the inner surface of the female end, the bonding force can be further increased.

By using nitrocellulose having a nitrogen content of 12.0 to 13.4% as a main component of the cylindrical container and the ignition cartridge, the container itself has a function as an explosive,
The same propulsion function as a propellant can be provided.

There is also an effect that after firing, no combustion residue remains in the gun.

Inner diameter of firearm (A) and outer diameter of columnar container (D)
Is set to 20 mm or less, the deviation from the axis can be reduced, and at the same time, the volume for storing the propellant necessary to secure a desired range is increased.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The present invention will be described in detail.

Example 1 73 parts of nitrocellulose having a nitrogen content of 12.8%, 18 parts of kraft pulp, 9 parts of synthetic resin and a small amount of a stabilizer are suspended in water to form a slurry. It is hardened by heating and pressing with a mold, and has an outer diameter of 155 m.
m, including an ignition cartridge with a length of 180 mm and an inner diameter of 25 mm,
A columnar container was manufactured. The length of each of the male end portion and the female portion of the columnar container was 30 mm. The unit-type charge of the present invention was manufactured by filling the propellant into the columnar container and providing the igniter on the inner surface of the hollow ignition cartridge. Figure 1
Shown in

Example 2 The unit charge prepared in Example 1 was loaded into a 155 mm caliber gun. This state is shown in FIG. In FIG. 2, 6 is a medicine chamber, 7 is a fire tube, and 8 is a fire tube axis.

Since the inside diameter of the firearm charge chamber to be charged is 162 mm, D + d = 180 mm, A = 162 mm → D + d> A A−D = 7 mm → A−D <20 mm. It was confirmed that the passing axis was passing. Example 3 Two unit-type charges manufactured in Example 1 were knitted, one was fixed, and the other was pulled out.
When the force was measured, it was 15 kg. Also, even if six unit charges were knitted and lifted or loaded into a gun, the connection was not broken.

Embodiment 4 Even if only one unit-type charge manufactured in Example 1 is loaded, or six unit-type charges are knitted and loaded, the unit-type charge is securely caught by the charge stopper 9 provided in the gun charge chamber. Even if the gun was angled up to 70 °, it did not slip.

FIG. 3 shows this state.

Example 5 A combustion test was carried out using a 155 mm short cannon simulating a 155 mm caliber cannonball, and a pressure change diagram showing normal combustion behavior as shown in FIG. 4 was obtained.

[0031]

As described above, the unit-type propellant charge according to the present invention is easy to handle, and even when a large number of pieces are connected, the connection is stable. Since the propellant matches the hollow portion of the cylinder, the propellant can be ignited all at once and can be uniformly burned, so that the designed performance can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional explanatory view of a unit-type propellant charge of the present invention.

FIG. 2 is an explanatory sectional view illustrating a state in which a unit type propellant charge of the present invention is loaded on a gun.

FIG. 3 is a sectional explanatory view illustrating a state in which the unit-type propellant charge of the present invention is stopped at a predetermined position by a stopper.

[4] in a schematic illustration of a pressure change at the time of ignition of the pressure P ₁ of the pressure P ₂ and the rear end portion of the distal end portion of the barrel in the unit charge, explaining the normal.

FIG. 5 is an explanatory diagram when the unit charge is uncoupled or when the propellant is not uniformly ignited from the igniter.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F42B 5/38 F42B 5/16

Claims (4)

(57) [Claims] 1. A unit-type propellant in which a propellant is filled in a cylindrical container made of a burnout material and having openings at the center of both end surfaces, wherein the container has a male end on one end surface side and another end surface. On the side, a female end to which the male end of another unit type propellant can be fitted is formed so as to be integrally formed, and each unit is formed only by the male end and the female end.
And an inner surface of the container having an inner diameter (d) of 10 to 40 mm coaxially with the center axis of the end surface of the container, and an ignition cartridge holding an ignition charge is provided on the inner surface. And the sum of the outer diameter (D) of the cylindrical container and the inner diameter (d) of the ignition cartridge exceeds the internal diameter of the gun cartridge (A), and the Young's modulus of the female end is set to 100 to 200 kg / mm ² . set point when shooting a male end of another unit type propelling charge
A unit-type propellant charge characterized in that it can be connected by fitting with a peeling force of 5 kgf or more that is not separated by a fire impact . 2. The columnar container has a nitrogen content of 12.0-13.
The unit propellant charge according to claim 1, comprising a burnout material containing 4% nitrocellulose as a main component. 3. The unit firing charge according to claim 1, wherein the difference between the inside diameter of the gun cartridge (A) and the outside diameter (D) of the columnar container is 20 mm or less. 4. The columnar container has a nitrogen content of 12.0-13.
2. The unit firing according to claim 1, wherein the unit is made of a burnout material containing 4% nitrocellulose as a main component, and the difference between the inner diameter of the gun chamber (A) and the outer diameter of the columnar container (D) is 20 mm or less. Charge.