CN101799256B

CN101799256B - Pneumatic firing mechanism

Info

Publication number: CN101799256B
Application number: CN 201010133576
Authority: CN
Inventors: 刘少刚; 刘刚; 王士成; 周杰; 刘铮; 吕建伟; 邓波; 徐建伟; 汪溢; 安进华
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2010-03-29
Filing date: 2010-03-29
Publication date: 2012-09-26
Anticipated expiration: 2030-03-29
Also published as: CN101799256A

Abstract

The invention aims to provide a pneumatic firing mechanism comprising a gun barrel, an accompanying pipe, a return spring, a sliding plate, a firing pin and a firing spring, wherein one part of the outer wall of the accompanying pipe directly contacts with the inner wall of the gun barrel, and the return spring is clamped between the other part of the outer wall of the accompanying pipe and the inner wall of the gun barrel; a position near the tail end of the gun barrel is provided with a high-pressure pore, the firing pin is arranged on one end of the accompanying pipe and near one side of the outlet of the gun barrel; the outer side of the firing pin is tightly stuck to the inner wall of the gun barrel; the two sides of the firing pin are respectively clamped with the sliding plate and the firing spring; the sliding plate is annular, and the outer wall of the sliding plate is tightly stuck to the inner wall of the gun barrel; and the firing spring is annular, and the outer side of the firing spring is tightly stuck to the inner wall of the sliding plate. The invention can accurately and quickly apply high-pressure air on a shell, and lowers dependence on pneumatic valve performance; before the shell is transmitted, the high-pressure pore is filled with the high-pressure air, the accompanying pipe supports the high-pressure pore to isolate a breech from the high-pressure air so as to avoid supplying air to the breech by turning on the pneumatic valve and ensure the transmitting speed of shell.

Description

A kind of Pneumatic firing mechanism

Technical field

What the present invention relates to is a kind of trigger mechanism, specifically utilizes the trigger mechanism of gases at high pressure as launch power.

Background technology

Whenever major holiday or large-scale celebration, all can set off fireworks display increases celebrating atmosphere.And the mode of gunpowder emission is mainly still adopted in the emission of Fireworks and firecrackers now, has been full of the smell of gunpowder in the city after setting off, and this pollution to environment is very serious.Along with the environmental protection theme that becomes international; In order to realize the purpose of environmental protection; Present increasing display shell adopts pneumatic transmitter to launch, and adopts the speed of the display shell that this radiation pattern launches and precision can both be guaranteed and control easily.

One of natural calamity that the forest fire right and wrong are usually seen, it has all brought huge threat for the forest and the mankind.The fire extinguishing big gun has become one of important fire-fighting equipment of reply forest fire.Nowadays, many fire extinguishing big guns still adopt the gunpowder firing lock to launch fire extinguisher bomb, because this kind emission form is brought new kindling material easily, so be unfavorable for being used on the forest fire prevention and control, pneumatic emission has become new trend.

In traditional Pneumatic catapult, the emission valve is the core component of emitter, is the switching control pilot of emission system.But the emission valve needs certain air inlet time when emission, influenced the speed of the shell of launching to a certain extent.Need the instantaneous pressurization of ability in the reality and launch to have high-speed, high-precision novel pneumatic percussion structure.

Summary of the invention

The object of the present invention is to provide and rapidly gases at high pressure to be added to a kind of Pneumatic firing mechanism of realizing the total head emission on the emission bullet.

The objective of the invention is to realize like this:

The present invention includes gun tube, follow pipe, returning spring, slide plate, percussion pin and percussion spring; Follow the part of pipe outer wall directly to contact with the gun tube inwall; Accompany returning spring between another part and the gun tube inwall, on the position near the gun tube tail end, have the high pressure pore, percussion pin is positioned at an end of following pipe, near a side of gun tube outlet; The gun tube inwall is close in the outside of percussion pin; The two sides of percussion pin accompanies slide plate and percussion spring respectively, and slide plate is that annular and outer wall are close to the gun tube inwall, and the percussion spring is that the slide plate inwall is close in the annular and the outside.

A kind of Pneumatic firing mechanism of the present invention can also comprise:

Described percussion pin has 8～12, becomes circle distribution.

Advantage of the present invention is:

Can gases at high pressure accurately be added to rapidly on the shell, to the dependence reduction of pneumatic operated valve performance; Charge into gases at high pressure in the high pressure pore before the emission, withstand the isolation that the high pressure pore is realized breech and gases at high pressure, replaced through opening pneumatic operated valve to come to the breech air feed through following pipe; Can guarantee the emission rate of shell.

Description of drawings

Fig. 1 is overall structure figure of the present invention

Fig. 2 is an A place enlarged drawing among Fig. 1 of the present invention;

Fig. 3 is the sketch map that shell of the present invention breaks away from state when following pipe;

The specific embodiment

For example the present invention is done description in more detail below in conjunction with accompanying drawing:

In conjunction with Fig. 1---3, the present invention is mainly by following pipe 4, returning spring 5, gun tube 6, slide plate 9, percussion pin 10, percussion spring 11 to form.Have high pressure pore 2 on the gun tube 6.Follow pipe 4 to be close to gun tube 6 inwalls, follow pipe 4 to block the high pressure pore before the emission and prevent that gases at high pressure from getting into gun tube breech 1.Follow pipe 4 interior thoraxes that shell 3 is housed, shell 3 front ends withstand percussion pin 10 before the emission, pull the trigger pin 10 and withstand gun tube 6 inwalls; Like this shell 3 can with follow the pipe 4 be consistent ground propulsion; Percussion pin 10 is at the front end of following pipe 4, and around following pipe 4 circumference to place, percussion pin 10 withstands slide plate 9 through percussion spring 11; Slide plate 9 is close to gun tube 6 inwalls; Circular hole is arranged in the middle of the slide plate 9, and percussion pin 10 withstands gun tube 6 inwalls through circular hole, and slide plate 9 and percussion pin 10 slide along gun tube 6 inwalls when following pipe 4 to travel forward during emission.Gun tube 6 inwalls are provided with groove 7, when following pipe 4 to travel forward, withstand gun tube 6 inwalls of front, and by 7 li of jacking grooves, shell 3 fronts lose resistance to percussion pin 10 under the effect of shell 3, break away under the effect of gases at high pressure in the back to follow pipe 4 emission forward.

After shell 3 is followed pipe 4 through the propulsive mechanism entering, withstand and follow the percussion pin 10 of managing 4 front ends with following pipe 4 to advance, this moment, breech sealed.When shell 3 with follow pipe 4 to travel forward after a bit of distance; High pressure pore 2 is opened; Gases at high pressure get into breech to be continued to promote shell 3 and follows pipe 4 motions; Pipe 4 high pressure pore 2 openings that travel forward are increasing along with following, stop motion when following pipe 4 to withstand gun tube 6 inwalls of front, and the high pressure pore 2 gases at high pressure total head that all is opened is added to shell 3 rears at this moment; 10 effects at shell 3 of percussion pin are urged into 7 li of grooves, and shell 3 fronts lost resistance and broke away from and follow the emission of pipe 4 total heads this moment.

When shell 3 break away from follow pipe 4 after tightly pressing percussion pin 10 because shell 3 rears exist gases at high pressure, make percussion pin 10 by tightly be pressed in 7 li of grooves, make like this to follow and manage 4 and can not get back to initial position.After shell 3 is launched gun muzzle; Gas pressure intensity in the bore sharply descends and returns to normal pressure, and percussion pin 10 loses high-pressure gas pressure, homing under the effect of percussion spring 11; Follow pipe 4 homing under the effect of returning spring 5, seal high pressure pore 2 and prepare for emission next time.

Claims

1. Pneumatic firing mechanism; It is characterized in that comprising gun tube (6), follow pipe (4), returning spring (5), slide plate (9), percussion pin (10) with pull the trigger spring (11); Follow the part of pipe (4) outer wall directly to contact, follow between another part and gun tube (6) inwall of pipe (4) outer wall and accompany returning spring (5), on position, have high pressure pore (2) near gun tube (6) tail end with gun tube (6) inwall; The side that percussion pin (10) is positioned at an end of following pipe (4), exports near gun tube (6); Gun tube (6) inwall is close in the outside of percussion pin (10), and the two sides of percussion pin (10) accompanies slide plate (9) and percussion spring (11) respectively, and slide plate (9) is close to gun tube (6) inwall for annular and outer wall; Percussion spring (11) is close to slide plate (9) inwall for the annular and the outside, and described percussion pin (10) has 8～12, becomes circle distribution.