A constant pressure controllable fireworks launching device

Abstract

The present invention proposes a constant pressure controllable fireworks launch device, which is mainly composed of a launch tube, an explosion chamber, a pressure relief chamber and a base. Among them, the inner wall of the launch tube has spiral rifling, which makes the launched fireworks fly in rotation, increasing the flight trajectory stability, shooting stroke and shooting accuracy; the spacer between the explosion chamber and the launch tube is provided with a spiral oblique through hole, which is used to form a vortex airflow, increase the rotation speed of the fireworks when leaving the barrel, and cooperate with the spiral rifling to enhance the stability and anti-interference ability of the shooting direction of the fireworks; the pressure relief chamber adopts a fixed volume design to enhance the accuracy of the fireworks launch height, and the launch height of the fireworks can be adjusted by replacing the pressure relief chambers of different volumes; the base adopts a bottom plate plus two side plates. The two side plates are used to fix the launch barrel, and the bottom plate is used to fix with the launch platform. This fixing method can ensure the stability of the launch device and the system rigidity, and enhance the resistance to strong shooting recoil.

Description

Technical Field

[0001] The invention belongs to the technical field of special effect fireworks emission, and in particular relates to a constant pressure controllable fireworks emission device. Background Art

[0002] In recent years, the launch of special effect fireworks with specific texts and patterns has become an indispensable part of grand events held in my country and a highlight that attracts everyone's attention. Although my country's current special effect fireworks launch technology is at the forefront of the world, there is still much room for improvement in the accuracy and height of fireworks launch. Existing special effect fireworks launch devices mostly use a pressure relief chamber with adjustable volume. The mechanical principle of this device is to push the chamber piston through the worm gear mechanism to achieve the volume adjustment of the pressure relief chamber. In theory, this device can use the same device to launch special effect fireworks at different heights, with a wide range of adjustability and strong versatility. But in fact, because the instantaneous reaction force generated by the special effect fireworks on the launch frame when launching reaches more than 10Mpa, the huge reaction force will cause greater vibration damage to the worm gear, which has poor rigidity. Therefore, it is difficult to guarantee the service life and stability of the mechanism of this device in practical applications. In addition, the high-pressure airflow generated by the ammunition at the moment of explosion in the explosion chamber causes the piston to move downward, and it is impossible to achieve accurate pressure distribution, resulting in difficulty in controlling the launch height and ensuring the launch accuracy. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention proposes a constant-pressure controllable fireworks launching device to solve the technical problem of how to enhance the controllability of the fireworks launching direction and launching height, improve the fireworks launching accuracy and the mechanical rigidity of the fireworks launching device, and ensure that specific text or pattern fireworks are realized according to a predetermined design plan.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a constant-pressure controllable fireworks launching device, which consists of a launching tube, an explosion chamber, a pressure relief chamber and a base; wherein the top and bottom of the explosion chamber are respectively connected to the launching tube and the pressure relief chamber, and the launching tube, the explosion chamber and the pressure relief chamber constitute a launching barrel and are connected to the base; a lead device and an air release device are installed on the side wall of the explosion chamber; the pressure relief chamber adopts a constant-volume pressure relief chamber with a fixed volume, and pressure relief chambers with different volumes can be replaced according to the launch needs; an upper spacer is arranged between the explosion chamber and the launching tube, and the upper spacer is processed with a through hole.

[0007] Furthermore, the inner wall of the launch tube is processed with spiral rifling.

[0008] Furthermore, the upper spacer is processed with spiral oblique through holes distributed in an array.

[0009] Furthermore, a lower spacer is provided between the pressure relief chamber and the explosion chamber, and the lower spacer is processed with a pressure relief hole.

[0010] Furthermore, the launching device can replace the lower diaphragm with pressure relief holes of different apertures according to launching requirements.

[0011] Furthermore, the base includes a bottom plate and side plates fixed on the bottom plate; the explosion chamber is connected to the side plates through a rotating component to achieve the elevation angle adjustment of the launching barrel.

[0012] Furthermore, the side plate is provided with a limit rod for limiting the pitch angle of the launch tube.

[0013] Furthermore, the explosion chamber is connected to a fixing plate, which is fixedly connected to the side plate and is used to fix the launching barrel on the base.

[0014] Furthermore, the base plate is fixedly connected to the launch platform through positioning pins and fixing bolts.

[0015] Furthermore, the inner diameter of the launch tube is less than φ50mm and the length is not less than 1000mm.

[0016] (III) Beneficial effects

[0017] The present invention proposes a constant pressure controllable fireworks launch device, which is mainly composed of a launch tube, an explosion chamber, a pressure relief chamber and a base. Among them, the inner wall of the launch tube has spiral rifling, which makes the launched fireworks fly in rotation, increasing the flight trajectory stability, shooting stroke and shooting accuracy; the spacer between the explosion chamber and the launch tube is provided with a spiral oblique through hole, which is used to form a vortex airflow, increase the rotation speed of the fireworks when leaving the barrel, and cooperate with the spiral rifling to enhance the stability and anti-interference ability of the shooting direction of the fireworks; the pressure relief chamber adopts a fixed volume design to enhance the accuracy of the fireworks launch height, and the launch height of the fireworks can be adjusted by replacing the pressure relief chambers of different volumes; the base adopts a bottom plate plus two side plates. The two side plates are used to fix the launch barrel, and the bottom plate is used to fix with the launch platform. This fixing method can ensure the stability of the launch device and the system rigidity, and enhance the resistance to strong shooting recoil.

[0018] The present invention can solve the problems of large error between the actual explosion point and the set position, inconsistent launching heights of the same device, and unstable launching device mechanism during the launching process of special effect fireworks, enhance the controllability of the launching direction and launching height of fireworks, improve the launching accuracy of fireworks and the mechanical rigidity of the fireworks launching device, and ensure that specific text or pattern fireworks are realized according to a predetermined design plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a constant-pressure controllable fireworks launching device according to an embodiment of the present invention;

[0020] Figure 2Schematic diagram of the upper spacer structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0022] This embodiment provides a constant pressure controllable fireworks launching device, the structure of which is as follows: Figure 1 As shown, it is mainly composed of four parts: a launch tube 1, an explosion chamber 3, a pressure relief chamber 7 and a base 9. Among them, the top and bottom of the explosion chamber 3 are connected to the launch tube 1 and the pressure relief chamber 7 respectively, and the launch tube 1, the explosion chamber 3, and the pressure relief chamber 7 together constitute a launch barrel and are connected to the base 9.

[0023] In this embodiment, the inner diameter of the launch tube 1 is less than φ50mm and the length is greater than 1000mm. The inner wall of the launch tube 1 is processed with spiral rifling, which can make the launched fireworks fly in rotation, ensure the stability of the flight trajectory, increase the launch stroke, and improve the launch accuracy.

[0024] The bottom of the launch tube 1 is connected to the top of the explosion chamber 3 through a connecting sleeve 2 and a locking nut 12, and an upper spacer 4 is provided between the explosion chamber 3 and the launch tube 1. Figure 2 As shown, the upper spacer 4 is processed with spiral oblique through holes distributed in a circular array, which is used to form a vortex airflow in the launch tube 1 to increase the rotation speed of the fireworks when they leave the barrel, and cooperate with the spiral rifling to enhance the shooting direction stability and anti-interference ability of the fireworks. By replacing the upper spacer 4 with spiral oblique through holes of different apertures and different thicknesses, the initial launch speed and rotation speed of the fireworks can be controlled.

[0025] The left and right sides of the explosion chamber 3 are relatively installed with a fuse device 5 and a gas release device 6. The fuse device 5 is used to ignite the propellant in the explosion chamber 3. The high-pressure gas generated by the explosion of the propellant provides power for the launch of the fireworks. The gas release device 6 is used to keep the pressure balance between the pressure relief chamber 7 and the explosion chamber 3 and the external atmospheric pressure after the fireworks are launched. A lower spacer 8 is arranged between the pressure relief chamber 7 and the explosion chamber 3, and a pressure relief hole is processed in the middle of the lower spacer 8. By replacing the lower spacer 8 with pressure relief holes of different apertures, the pressure of the downward impact of the airflow generated by the propellant at the moment of the explosion of the explosion chamber 3 can be controlled.

[0026] In the present invention, the pressure relief chamber 7 adopts a fixed volume design. Since the pressure relief chamber 7 with a fixed volume is adopted, it can ensure that the thrust transmitted from the explosion chamber 3 to the launch tube 1 is constant during each shooting, ensure the consistent launch height of the fireworks, and enhance the accuracy of the launch height of the fireworks. By replacing the pressure relief chamber 7 with different volumes, the fireworks can be launched to different heights.

[0027] The base 9 includes a bottom plate and two side plates fixed on the bottom plate. The middle outer wall of the explosion chamber 3 is connected to the two side plates of the base 9 by a rotating pin 11, which is used to adjust the pitch angle of the launch barrel. A limit rod 15 is welded between the two side plates of the base 9 to limit the pitch angle of the launch tube 1 and increase the strength of the launch device. A fixing plate 10 is welded to the outer wall of the bottom of the explosion chamber 3, and the two sides of the fixing plate 10 are fixedly connected to the two side plates of the base 9 by locating pins and fixing bolts, respectively, to fix the launch barrel on the base 9. The bottom plate of the base 9 is fixedly connected to the launch platform by locating pins 13 and fixing bolts 14. Through the above fixing method, the structural stability and system rigidity of the entire launch device can be guaranteed, and the resistance to strong shooting recoil can be enhanced.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A constant pressure controllable fireworks launching device, the launching device is composed of a launching tube, an explosion chamber, a pressure relief chamber and a base; wherein, The top and bottom of the explosion chamber are respectively connected to the launch tube and the pressure relief chamber, and the launch tube, the explosion chamber and the pressure relief chamber constitute a launch barrel and are connected to the base; it is characterized in that the side wall of the explosion chamber is installed with a lead device and a gas release device; the pressure relief chamber adopts a fixed-volume pressure relief chamber with a fixed volume, and pressure relief chambers with different volumes can be replaced according to the launch needs; an upper spacer is arranged between the explosion chamber and the launch tube, and the upper spacer is processed with array-distributed spiral oblique through holes; a lower spacer is arranged between the pressure relief chamber and the explosion chamber, and the lower spacer is processed with pressure relief holes.

2. The constant pressure controllable fireworks launching device according to claim 1, characterized in that: The inner wall of the launch tube is processed with spiral rifling.

3. The constant pressure controllable fireworks launching device according to claim 1, characterized in that: The launching device can replace the lower diaphragm with pressure relief holes of different apertures according to launching needs.

4. The constant pressure controllable fireworks launching device according to claim 1, characterized in that: The base includes a bottom plate and side plates fixed on the bottom plate; the explosion chamber is connected to the side plates through a rotating component to achieve the pitch angle adjustment of the launching barrel.

5. The constant pressure controllable fireworks launching device according to claim 4, characterized in that: The side plate is provided with a limit rod for limiting the elevation angle of the launch tube.

6. The constant pressure controllable fireworks launching device according to claim 4, characterized in that: The explosion chamber is connected with a fixing plate, which is fixedly connected to the side plate and is used to fix the launching barrel on the base.

7. The constant pressure controllable fireworks launching device according to claim 4, characterized in that: The base plate is fixedly connected to the launching platform via positioning pins and fixing bolts.

8. The constant pressure controllable fireworks launching device according to any one of claims 1 to 7, characterized in that: The inner diameter of the launch tube is less than φ50mm and the length is not less than 1000mm.

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