CN-121973932-A - Accurate bullet device and unmanned aerial vehicle of putting out a fire

CN121973932ACN 121973932 ACN121973932 ACN 121973932ACN-121973932-A

Abstract

The invention provides an accurate bullet throwing device, which belongs to the technical field of unmanned aerial vehicles and comprises a baffle plate with an opening, wherein a turntable is rotationally arranged in the baffle plate, a plurality of bullet grooves are uniformly formed in the turntable, threaded columns are arranged in the bullet grooves, fire extinguishing bullets are connected to the threaded columns in a threaded manner, a servo motor is arranged on the baffle plate and used for driving the turntable to rotate, a reset spring which enables the fire extinguishing bullets to fall off in an accelerating manner is arranged on the threaded columns, and an air bag filled with helium is arranged on an unmanned aerial vehicle body. The high-speed rotation projectile body has the beneficial effects that the ballistic stability and the accuracy are obviously improved, the high-speed rotation projectile body can obtain extremely strong directional stability, and the directivity is maintained. The stable spiral descent avoids the tumbling of the projectile body, realizes the innovative design in the aspects of load, energy consumption, stability and safety through a hybrid power architecture and ingenious pneumatic layout, and is particularly suitable for the scenes of tasks such as forest fire extinguishing, inspection, air monitoring, communication relay and the like which need a long time.

Inventors

PAN BOBO
HOU XIAOLONG
WANG HUAN
PAN YINGCHUAN
YANG JINGGUANG
LIU CHUNTAO
SHEN LIN
PAN LONGBO
PAN BOYU
LIU YIHAN
Sun Runbing
PAN CHENGCHENG

Assignees

浙江杭州喀秋莎智能交通技术有限责任公司

Dates

Publication Date: 20260505
Application Date: 20251017

Claims (10)

1. The accurate bullet throwing device comprises a baffle (5) and is characterized in that a turntable (3) is rotatably installed in the baffle (5), a plurality of bullet grooves (7) are uniformly formed in the turntable (3), threaded columns (8) are installed in the bullet grooves (7), and fire extinguishing bullets (4) are connected to the threaded columns (8) in a threaded mode.
2. The precise projectile throwing device according to claim 1, wherein the baffle (5) is provided with a servo motor (6) for driving the turntable (3) to rotate.
3. The accurate projectile throwing device according to claim 1, wherein the threaded column (8) is provided with a reset device (9) for enabling the fire extinguishing projectile (4) to be accelerated and fallen off.
4. A precision projectile apparatus as claimed in claim 3 wherein said return means (9) is a spring.
5. The precise projectile throwing device according to claim 1, wherein the fire extinguishing bomb (4) is provided with a tail wing (41), a guide groove (42) is formed in the fire extinguishing bomb (4), and threads in threaded connection with the threaded column (8) are formed in the guide groove (42).
6. Fire extinguishing unmanned aerial vehicle, comprising a precision projectile throwing device according to any one of claims 1 to 5, characterized in that a antigravity device (2) is installed above the unmanned aerial vehicle body (1).
7. The fire fighting unmanned aerial vehicle of claim 6, wherein said antigravity device is a helium filled balloon.
8. A fire fighting unmanned aerial vehicle according to claim 7, wherein the air bag comprises a central air bag (2) positioned above the center of the unmanned aerial vehicle and an edge air bag (10) positioned below the propeller, and a vent hole is formed in the middle of the air bag.
9. A fire extinguishing unmanned aerial vehicle according to claim 8, wherein the central vent hole (21) in the central air bag (2) coincides with the centre of the unmanned aerial vehicle body de1 and the edge vent hole (101) in the edge air bag (10) coincides with the centre of the propeller.
10. The fire extinguishing unmanned aerial vehicle according to claim 8, wherein the center of the unmanned aerial vehicle body (1) is provided with a through hole communicated with a central air bag vent hole (21), and the cross section of the vent hole is dumbbell-shaped.

Description

Accurate bullet device and unmanned aerial vehicle of putting out a fire Technical Field The invention belongs to the technical field of aircrafts, and particularly relates to a projectile throwing device. Background The extinguishing efficiency of forest fires and personnel safety are important, and the unmanned aerial vehicle is used as a novel fire extinguishing platform, so that the value of the unmanned aerial vehicle is increasingly outstanding. However, when the existing fire-extinguishing unmanned aerial vehicle executes the bullet-throwing task of the core, the accuracy and the reliability of the existing fire-extinguishing unmanned aerial vehicle still have serious technical shortboards, so that the overall fire-extinguishing efficiency is low. The free-falling type projectile scheme commonly adopted in the prior art is the root cause of the problems. Under this scheme, after the body breaks away from unmanned aerial vehicle, its whereabouts orbit is led by gravity completely, and initial state and external wind field jointly determine its landing point. This mode has inherent drawbacks: The anti-interference capability is extremely weak and is easy to be restricted by complex fire scene environments. The updraft and turbulent gusts generated by high temperatures in a fire scene create an extremely complex aerodynamic environment. During free fall, any small lateral air flow of conventional cylindrical or spherical extinguishing bombs can generate significant lateral forces, resulting in severe drift and even tumbling of the projectile as if it were in the wind. This makes the pre-set trajectory completely ineffective, the drop point spread is large, and it is difficult to hit the fire core. The above problems need to be solved in time, and therefore, the present invention has been completed. Disclosure of Invention The invention aims to provide a projectile throwing device and aims to solve the problem that in the prior art, a fire extinguishing unmanned aerial vehicle throws a projectile inaccurately. In order to achieve the aim, the invention provides the technical scheme that the accurate bullet throwing device comprises a baffle plate with an opening, a turntable is rotatably arranged in the baffle plate, a plurality of bullet grooves are uniformly formed in the turntable, threaded columns are arranged in the bullet grooves, fire extinguishing bullets are connected to the threaded columns in a threaded manner, a servo motor is arranged on the baffle plate and used for driving the turntable to rotate, and a reset spring for enabling the fire extinguishing bullets to fall off in an accelerating manner is arranged on the threaded columns. Specifically, the tail fin is arranged on the fire extinguishing bomb, the guide groove is formed in the fire extinguishing bomb, and the threads connected with the threads are formed in the guide groove. Preferably, the central airbag filled with helium is arranged above the unmanned aerial vehicle body, the central vent hole is formed in the middle of the central airbag, the central vent hole coincides with the center of the unmanned aerial vehicle body, the through hole communicated with the central airbag vent hole is formed in the center of the unmanned aerial vehicle body, and the edge vent hole of the edge airbag coincides with the center of the propeller. Further, the cross section of the vent hole is dumbbell-shaped. Compared with the prior art, the bullet throwing device has the beneficial effects that: 1. the stability and the accuracy of the trajectory are obviously improved. The elastomer rotating at a high speed can obtain extremely strong directional stability, and the directivity thereof is maintained. This means that after the target is aligned instantaneously in the throwing, the projectile is able to effectively resist the disturbance of the lateral air flow during the falling, keeping the head oriented, greatly reducing the spreading of the landing points, and realizing the accurate hit of "what is meant to be what is meant to be. 2. The falling gesture is optimized, and the functional reliability is ensured. The stable helical descent avoids the tumbling of the projectile, which not only ensures its aerodynamic profile to play its intended role, but more importantly, ensures that it lands in the designed optimum attitude (usually the head) when it touches the ground, thus reliably triggering the release mechanism of the extinguishing agent, avoiding the risk of dummies caused by lateral or bottom impacts. The anti-gravity device has the beneficial effects that: the helium gas bag with the middle opening is combined with the unmanned aerial vehicle, and the beneficial effects of the lifting process can be summarized as follows: 1. And the energy efficiency is improved, the weight lifting task of the unmanned aerial vehicle is given to low-cost helium, and the motor is only responsible for 'control', so that the ultra-long endurance is realiz