CN216954209U - Recoil-free firework launching device - Google Patents

Abstract

The utility model provides a recoilless firework launching device which comprises a barrel, a breechblock, a balance body, a supporting system, a powder chamber and a breech mechanism, wherein the barrel is manufactured by adding an expansion type Laval nozzle at the rear part of a cylindrical barrel, the balance body is connected with the breechblock through a re-feeding spring, the balance body is positioned in the Laval nozzle, and the balance body is matched with the Laval nozzle to ensure the gas closing effect between the balance body and the inner wall of the Laval nozzle before the breech is opened. The nozzle can be quickly opened under different pressures by adjusting the elasticity of the recoil spring and the weight of the balance body, the unlatching time and the closing time of the pressure relief of the chamber are controlled, the pressure of the tail jet flow is adjusted, the initial speed control is realized, the launching height and the launching speed of the fireworks are further controlled, the impact damage to the fireworks in the launching process is reduced, the launching precision of the fireworks and the mechanical rigidity of a fireworks launching device are improved, and the realization of fireworks with specific characters or patterns according to the design effect is ensured.

Description

Recoil-free firework launching device

Technical Field

The utility model belongs to the technical field of firework setting off, and particularly relates to a recoil-free firework launching device capable of controlling launching height and launching speed by adjusting tail jet flow pressure.

Background

In recent years, special effect fireworks with specific characters and patterns have become an indispensable link for holding great activities in China and a bright spot for the public to pay attention. Although the special firework chamber pressure launching technology in China is in the front of the world firework technology field, great progress space is still left in the aspects of firework launching precision and height control.

Many of the current fireworks still use explosives instead of gunpowder to provide the firing power and thus cause their bore pressure profile to exhibit extreme high-then-low pulse characteristics. The high chamber pressure has serious impact on the gun barrel, the high chamber pressure pulse work doing efficiency is lower, and the launching efficiency of the whole launching device is very low under the characteristic of high resistance of spherical shots. It has been proposed to control the firing height by varying the partial pressure, but the firing height control has not been as effective as desired due to the randomness of the ignition of the powder and the instability of the combustion.

Chinese patent CN101240992B proposes a device for burning controllable fireworks with fixed-distance partial pressure, which adopts a pressure relief cabin with adjustable volume and a launcher base with adjustable launching angle. The mechanical principle of the device is that the volume of the pressure relief bin is adjusted by pushing a chamber piston through a worm gear mechanism; the inclination angle of the transmitting tube is adjusted through a 3-RPR + S parallel mechanism. The device tries to use the same device to launch special-effect fireworks with different angles and different heights so as to realize adjustability in a larger range and strong universality. However, due to the fact that huge reaction force is generated on the launcher frame at the moment of launching the special-effect fireworks and the ultrahigh pressure is strong, the recoil force can generate large vibration damage on a worm gear mechanism and a mechanism with strong flexibility and poor rigidity, namely a 3-RPR + S parallel mechanism. In practical application, the service life of the device and the stability of the mechanism are difficult to guarantee. Meanwhile, when ammunition explodes in the combustion chamber, the piston moves downwards due to high-pressure airflow, accurate partial pressure cannot be realized, the launching precision is difficult to guarantee, and the launching height is difficult to control. In the technical scheme, a method for expanding the volume of the launching tube is adopted for a partial pressure control mode of the launching device, but in the launching process of gunpowder, due to the influence of the burning speed of the gunpowder, the tube begins to gradually attenuate after the chamber pressure wave crest, long time is needed from the beginning of combustion until the gunpowder gas touches the bottom of the tube body to achieve air pressure balance, a balance process cannot be established in the whole launching process from ignition to the ejection of the fireworks from the chamber, and therefore controllable adjustment of launching height cannot be achieved through the air pressure control mode.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a recoil-free firework launching device, which aims to solve the technical problem of how to accurately control the launching height and the launching speed of fireworks.

(II) technical scheme

In order to solve the technical problems, the utility model provides a recoilless firework launching device which comprises a barrel, a breechblock, a balance body, a supporting system, a powder chamber and a breech mechanism, wherein the breech mechanism comprises a breech mechanism body and a breech mechanism body; the body pipe is a metal tubular object and is manufactured by adding an expansion type Laval nozzle at the rear part of a cylindrical body; the barrel is connected with the supporting system through the trunnion, and the supporting system provides structural support for the whole launching device and controls the launching direction of the fireworks bomb; the explosive chamber is positioned at the tail part of the barrel and is used for filling fireworks; the breech mechanism is positioned at the rear part of the barrel and is used for installing a breech bolt; the balance body is connected with the breechblock through a recoil spring, is positioned in the Laval nozzle and is matched with the Laval nozzle so as to ensure the air-closing effect between the balance body and the inner wall of the Laval nozzle before the breech is opened.

Further, the breech bolt is connected with the breech mechanism through a hinge, or is arranged on the breech mechanism and seals the barrel through the sliding of the wedge iron.

Furthermore, the balancing body adopts a cone-shaped structure.

Further, the front section of the balance body is provided with an air-closing ring.

(III) advantageous effects

The utility model provides a recoilless firework launching device which comprises a barrel, a breechblock, a balancing body, a supporting system, a powder chamber and a breechblock mechanism, wherein the barrel is manufactured by adding an expanding Laval nozzle at the rear part of a cylindrical barrel, the balancing body is connected with the breechblock through a re-feeding spring, the balancing body is positioned in the Laval nozzle, and the balancing body is matched with the Laval nozzle to ensure the gas-closing effect between the balancing body and the inner wall of the Laval nozzle before opening. The nozzle can be quickly opened under different pressures by adjusting the elasticity of the recoil spring and the weight of the balance body, the unlatching time and the closing time of the pressure relief of the chamber are controlled, the pressure of the tail jet flow is adjusted, the initial speed control is realized, the launching height and the launching speed of the fireworks are further controlled, the impact damage to the fireworks in the launching process is reduced, the launching precision of the fireworks and the mechanical rigidity of a fireworks launching device are improved, and the realization of fireworks with specific characters or patterns according to the design effect is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a recoil-free firework emitting device according to an embodiment of the utility model.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The embodiment provides a recoilless fireworks launching device, the structure of which is shown in fig. 1, and the fireworks launching device mainly comprises a barrel 5, a breechblock 2, a balance body 3, a support system 4, a powder chamber 6 and a breech mechanism.

The barrel 5 is a metal tubular object, is manufactured by adding an expanding Laval nozzle 1 at the rear part of a cylindrical barrel body and is used as a structural main body of the whole launching device. The barrel 5 is connected with the support system 4 through a trunnion, and the support system 4 provides stable structural support for the whole launching device and controls the launching direction of the fireworks bomb.

The powder chamber 6 is positioned at the tail part of the barrel 5 and is used for filling fireworks. The breech mechanism is located at the rear of the barrel 5 for mounting the breech block 2. The breechblock 2 is connected with the breech mechanism through a hinge or is arranged on the breech mechanism and realizes the work of sealing the barrel 5 through the up-and-down or left-and-right sliding of a wedge. The balancing body 3 is connected with the breechblock 2 through a recoil spring, and the balancing body 3 is positioned in the laval nozzle 1. The balancing body 3 is matched with the Laval nozzle 1 to ensure the gas closing effect between the balancing body 3 and the inner wall of the Laval nozzle 1 before the chamber is opened, and in order to further improve the gas closing effect, a gas closing ring can be added in front of the balancing body 3 or a conical balancing body 3 and a barrel 5 are adopted for match grinding.

The rear part of the balance body 3 is provided with a recoil spring, the elasticity of the recoil spring is determined in a computer simulation calculation mode, after propellant powder is ignited, strong gas pressure acts on the balance body 3, after the chamber pressure exceeds the elasticity of the recoil spring, the balance body 3 moves backwards under the pressure impact of the propellant powder gas, the propellant powder gas is ejected backwards through a gap between the balance body 3 and the Laval nozzle 1, after the chamber pressure is reduced to be smaller than the elasticity of the recoil spring, the balance body 3 moves forwards again under the action of the recoil spring and is attached to the Laval nozzle 1 to seal a nozzle of the barrel body, and the pressure relief time is influenced by the weight of the balance body 3 and the elasticity of the recoil spring. Through above structure, can reduce the propellant powder gas and continue the back and spout the loss under low thorax pressure to improve the gaseous utilization ratio of propellant powder.

When the recoil-free firework launching device is used, firstly, the explosion height of a firework is determined according to a preset plan, the required energy is calculated according to the range of the firework, a chamber pressure control curve in the whole process is reversely deduced, the required muzzle initial velocity, explosive force energy and other parameters are input into a trajectory calculation program in the existing recoil-free firework weapon system, the elasticity of a recoil spring and the weight of a balance body are determined, and the balance body meeting the requirements is connected with the matched recoil spring and then is installed on a gun bolt. The direction and the angle of the barrel 1 are adjusted and fixed, the fireworks bomb and the propellant powder are loaded into the launcher, the fireworks bomb is accelerated along the outlet direction of the barrel after being excited, meanwhile, propellant powder gas pushes the balance body 3 downwards to start pressure relief, the balance body 3 gradually returns until the nozzle of the barrel is closed again along with the pressure reduction, so that the utilization rate of the propellant powder gas is improved, and the fireworks bomb explodes to generate fireworks with specific characters or patterns after flying to a preset height.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (1)

1. The firework launching device without recoil is characterized by comprising a barrel, a breechblock, a balance body, a supporting system, a gunpowder chamber and a breech mechanism; wherein the content of the first and second substances,

the barrel is a metal tubular object and is manufactured by adding an expansion type Laval nozzle at the rear part of the cylindrical barrel body; the barrel is connected with the supporting system through the trunnion, and the supporting system provides structural support for the whole launching device and controls the launching direction of the fireworks bomb; the explosive chamber is positioned at the tail part of the barrel and is used for filling fireworks; the breech mechanism is positioned at the rear part of the barrel and is used for installing a breech bolt, and the breech bolt is connected with the breech mechanism through a hinge or is arranged on the breech mechanism and seals the barrel through the sliding of a wedge; the balance body adopts the conical body structure, and the balance body anterior segment is provided with the gas ring that closes, and the balance body is connected with the breechblock through the recoil spring, and the balance body is located the laval spray tube, and the balance body cooperates with the laval spray tube to guarantee the effect of closing gas between balance body and the laval spray tube inner wall before the uncork.

Images