SI23324A - Device for filling tanks of compressed propellant of weapons whose bullet is driven by the aforementioned propellant - Google Patents

Abstract

The submitted invention refers to the preparation for filling the compressed air tank of weapons, whose bullet is driven by the aforementioned compressed air, while the compressed air for driving the bullet inside the tank reaches a pressure of a magnitude of 250 bar. The specified device consists of at least three pressure valves (1, 4, 7) of various diameters, which results in gradually generating the required air pressure for filling the aforementioned tank.

Description

Preparation for filling a tank of compressed propellant in a firearm whose projectile is driven by said propellant

The present invention relates to a device for filling a tank of compressed propellant in a firearm whose projectile is driven by said propellant, in particular an air weapon where the compressed air for propulsion of the missile reaches a pressure of the order of 250 bar.

Former solutions for filling a compressed propellant tank with firearms include either compressors or hand pumps. Compressors are cost-effective solutions, while working with a manual pump is relatively time-consuming and tedious.

It is an object of the present invention to provide a device for filling a tank of compressed propellant in a firearm whose projectile is driven by said propellant, where the disadvantages of the known solutions will be eliminated.

The task according to the invention is solved by the characteristics given in the characteristic part of claim 1. According to the invention it is provided that said device comprises primary pressure cylinders with a double acting piston and a tubular through piston rod, a second piston cylinder with a piston and a tertiary pressure cylinder with a piston. In seconds, the pressure cylinder is attached to the first free end of said primary pressure cylinder, while at the free end of said seconds the pressure cylinder of the extending tubular piston rod is fitted · · A piston of smaller diameter than the diameter of the piston in the primary pressure cylinder. Further, said tertiary pressure cylinder is mounted to the other free end of said primary pressure cylinder, while a free piston of smaller diameter than the diameter of the piston in the secondary pressure cylinder is mounted to the free end in said tertiary pressure cylinder of the extending tubular piston through it. The air supply to each pressure cylinder is controlled by a control valve and limit switches arranged on the primary pressure cylinder.

The pressure chambers of the secondary pressure cylinder and the tertiary pressure cylinder are connected via said tubular through piston of said double acting piston, the flow of the compressible medium from the tertiary chamber to the secondary chamber being prevented by a non-return valve.

The invention will now be described in more detail based on an embodiment and with reference to the accompanying drawing, which schematically shows a device for filling a tank of compressed propellant in a firearm according to the invention.

The device for filling the compressed propellant tank of the firearm according to the invention consists of a primary pressure cylinder 1 with a double-acting piston 2 with a tubular through piston 3. The second end of the primary pressure cylinder 1 is secured in seconds by a pressure cylinder 4 into which the first section 5 of said through of the piston rod 3, wherein the free end of said first section 5 through the piston rod 3 is provided with a piston 6. The other end of said primary pressure cylinder 1 is fitted with a tertiary pressure cylinder 7 into which the second section 8 of said lateral piston 3 extends, the free end being said second section 8 through the piston rod 3 provided with a piston 9. The said pistons 6, 9 are arranged on said tubular through piston rod 3 in such a way that the cavity of the tubular piston 3 connects the pressure chamber 10 of the secondary pressure cylinder 4 and the pressure chamber 11 of the tertiary pressure cylinder 7. According to the invention and in the present embodiment, it is envisaged that the piston 2 of the primary pressure cylinder 1 larger than the piston 6 of the secondary pressure cylinder 4, and said piston 6 being larger than the piston 9 of the tertiary pressure cylinder 7. Further, the free end of said second section 8 of the hollow through piston 3 is provided with a non-return valve 12 which prevents the flow of media which it is compressed from the pressure chamber 11 to the pressure chamber 10. An outlet line 14 is fitted to the free end of the tertiary pressure cylinder 7 via a non-return valve 13, which is connected to a non-shown compressed propellant tank in the firearm of the invention. The said outlet duct 14 is optionally fitted further

pressure gauge 15 and / or flow valve 16.

Each end of the pressure cylinder 1 is provided with an end switch 17, 18, which is connected to the control valve 21 in each case with a duct 19, 20. Further, said control valve 21 with the pressure chamber 24 of said primary pressure cylinder 1 is pneumatically connected in the area 22 of the first end of the primary pressure roller 1 and is pneumatically connected to the second end of the primary pressure roller 1 through the conduit 23. The control valve 21 is fed to the compressible medium through the inlet 25, and before entering the control valve 21, the line 26, which is connected to the pressure chamber 10 in the area of the free end of the secondary pressure cylinder 4 via a non-return valve 27.

Said (not shown) firearm tank is filled with compressed propellant, optionally air, whose final pressure reaches about 250 bar, e.g. with a conventional compressor that reaches a pressure of about 5 to 7 bar. The initial position of pistons 2, 6, 9 is shown in the sketch with a solid line. From the non-shown compressor, air with an initial pressure of about 5 bar is fed through the inlet 25 through the control valve 21 and the conduit 23 into the pressure chamber 24 of the primary cylinder 1 to the other side of the piston 2, that is, the side facing the tertiary pressure cylinder 7. At the same time air of the same initial pressure of about 5 bar is supplied from said compressor to the pressure chamber 10 of the secondary pressure cylinder 4 through the line 26 at the free end of said cylinder 4. The pressure into the pressure chamber 24 of the supply air pushes the piston 2 and the hollow through piston 3 into direction to the secondary pressure cylinder 4, wherein the piston 6 of the secondary pressure cylinder 4 compresses the supply air into the pressure chamber 10. Said non-return valve 27 in conduit 26 prevents the escape of compressed air having a pressure higher than said initial pressure of about 5 bar. When said piston 2 reaches the end point (shown in the dashed line in the drawing) on the side facing the secondary pressure roller 2, the extreme position of the piston 6 of said secondary pressure cylinder is also reached, leaving the hollow through the piston in the pressure chamber. 3 establishes a second stage pressure that is substantially higher than said initial pressure and reaches a size of about 40 bar. At this moment and at this second stage pressure, a non-return valve 12 is discharged in said piston 3, which releases compressed air into the chamber 11 of the tertiary pressure cylinder 7. The control valve 21, activated by the limit switch 17, simultaneously closes the air supply with said initial pressure. through conduits 26 and conduit 23, opening the inlet air with said initial pressure into the pressure chamber 24 to the first side of piston 2 through the conduit 22, that is, the side facing the primary pressure cylinder 4. Due to the surface of piston 2 of the primary pressure of cylinder 1, which is significantly larger than the surface of piston 9 of the tertiary pressure cylinder 7, the force on the piston 2 and thus on the piston 3 generated by the air with said initial pressure is sufficient to overcome the force generated by said second-stage the pressure of the air in the pressure chamber 11 to the surface of the piston 9, which causes the piston 9 to start moving away from the pressure cylinder 1. As a result, the pressure inside the pressure chamber 11 begins to increase. air, which is prevented by the non-return valve 12 in said hollow through piston 3 from returning to the pressure chamber 24 of the primary pressure cylinder 1. When piston 2 reaches its end position (shown in solid line in the drawing), the end switch 18 interrupts the air supply with said initial pressure around 5 to 7 bar, in the pressure chamber 11, in the area between the piston 9 and the free end of the tertiary pressure cylinder 7, a final air pressure of about 250 bar is required to fill said firearms tank. When said tank is filled and the pressure chamber 11 is emptied, leaving the pressure therein at about atmospheric pressure, the whole process can be repeated.

Claims (5)

Patent claims Apparatus for filling a tank of compressed propellant in a firearm whose projectile is driven by said propellant, characterized in that it consists of a primary pressure cylinder (1) with a double acting piston ( 2) and tubular through piston rod ( 3), secondary pressure cylinder ( 4) with a piston (6), said secondary pressure cylinder (4) being fitted to the first free end of said primary pressure cylinder (1) and a piston extending through said piston (3) extending through the piston through said piston (3) (6), and the tertiary pressure cylinder (7) with a piston (9), said tertiary pressure cylinder (7) being attached to the other free end of said primary pressure cylinder (1) and to the free end in said tertiary pressure cylinder (7) a piston (9) extending through the piston rods (3), the air supply to the respective pressure cylinder (1, 4, 7) being controlled by a control valve (21). Device according to claim 1, characterized in that the piston (2) of the primary pressure cylinder (1) is larger than the piston (6) of the secondary pressure cylinder (4), and that said piston (6) is of a larger pressure cylinder (4) diameters from the piston (9) of the tertiary pressure cylinder (7) · Device according to claims 1 and 2, characterized in that said pistons (6, 9) are arranged on said tubular through piston rod (3) in such a way that the cavity of the tubular piston rod (3) connects the pressure chamber (10) of the secondary pressure cylinder (4) ) and the pressure chamber (11) of the tertiary pressure cylinder (7). Apparatus according to any one of the preceding claims, characterized in that the primary pressure cylinder (l) is provided with an end switch (17, 18), operated by a control valve (21) for supplying air with initial pressure. Apparatus according to any one of the preceding claims, characterized in that the free end into the pressure chamber (11) of the extending second section (8) of the hollow through piston rod (3) is provided with a non-return valve (12) which prevents the flow of the compressible medium. , from the pressure chamber (11) of the tertiary pressure cylinder (7) to the pressure chamber (10) of the secondary pressure cylinder (4). • · Device according to any one of the preceding claims, characterized in that said control valve (21) is pneumatically connected to the first end of the primary pressure cylinder (l) by a pressure chamber (24) of said primary pressure cylinder (1) via a duct (22). ) and is pneumatically connected to the other end by means of conduit (23) 5 of the primary pressure cylinder (1), wherein the control valve (21) is supplied to the compressible medium via the inlet (25) and the line (26), which is discharged before entering the control valve (21), is in the area of the free end of the secondary pressure cylinder (4) connected to said pressure chamber (10) via a non-return valve (27).