CN201177484Y

CN201177484Y - Firework gas launcher

Info

Publication number: CN201177484Y
Application number: CNU2008200334479U
Authority: CN
Inventors: 吕兆华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-24
Filing date: 2008-03-24
Publication date: 2009-01-07
Anticipated expiration: 2018-03-24

Abstract

The utility model discloses a fuel gas ejector for a display shell. The fuel gas ejector comprises a combustion chamber consisting of a base, a combustion chamber pipe and a jet pipe component (containing a jet pipe contraction section, a jet pipe expansion section and a pressure maintaining membrane pressed between both sections), and is characterized in that an ignition system with a one-way air valve is arranged inside the combustion chamber pipe and on the base; the ignition system comprises a spark plug, a power source and an ignition controller; moreover, a launch canister is connected with the combustion chamber by means of a quick pipe interface so as to form a display shell launching device. Fuel gas and air are fed into the combustion chamber in turn through the one-way air valve, and are ignited and burned so as to form high pressure gas; the high pressure gas breaks through the pressure maintaining membrane, and gives an impulse and an initial speed to the display shell inside the launch canister, thereby completing the launch of the display shell. Due to taking the clean fuel gas with higher energy as a launch power source to replace black powder used in commonly-used display shell, the fuel gas ejector avoids a great amount of harmful gas and particles generated by black powder during combustion, thereby meeting the requirements of environmental protection and energy conservation.

Description

Display shell combustion gas transmitter

One technical field

The utility model relates to a kind of emitter of display shell, particularly utilizes fuel gas buring as power source, the low pollution and low consumed environment-friendly type emitter.

Two background technologies

Existing display shell mainly is by dress unpacking propellant and effect medicine in the papery shell case, goes between and is interlinked to the outside with regularly delaying, and outer attached impulse charge constitutes.Body is generally sphere, and existing also have a cylindricality.When setting off, display shell is placed in the launching tube, by lead-in wire or electric firing impulse charge is lighted, produce gases at high pressure predetermined spatial domain is arrived in the body impelling, the unpacking propellant that regularly ignites is blown body, and the effect medicine that catches fire disperses out by certain direction, thereby shows gorgeous photochromic pattern.

The impulse charge of generally using with display shell now still comes from the black powder of Ancient Chinese for one of four inventions, and its main component is potassium nitrate, sulphur and powdered carbon, and what have also contains potassium chlorate.Its burning back generates a large amount of gaseous products such as carbon dioxide, sulfur dioxide, carbon monoxide and nitrogen oxide, and the nearly solid or the gas dissolubility particulate of 50% inhalables such as potassium sulfide, carbon granules and some metal oxide.Existing a large amount of studies show that both at home and abroad, these products all can constitute in various degree injury to human body, even the meeting that has causes fatal diseases.Therefore, still use black powder to cause extensive concern at present in a large number.The new way of research environmental protection just becomes the important topic that the fireworks industry faces.The utility model is exactly to put forward under these circumstances.

Three utility model contents

The purpose of this utility model is to provide without black powder with combustion gas (natural gas or liquefied petroleum gas) as the launch power source, and combustion product does not constitute direct injury to human body, thereby is built into a kind of display shell emitter with environmental protection.

The technical solution that realizes the utility model purpose is: a kind ofly can carry out combustion gas and mix with air, light a fire then and burn the combustion chamber of generation gases at high pressure.When burning gases reached certain pressure, the pressurize diaphragm broke, and combustion product expands to launching tube by jet pipe, promoted display shell accelerated motion in launching tube, flew in the air with predetermined flight initial velocity, finished launch mission.Transmitter of the present utility model comprises the combustion chamber of being made up of base, combustion chamber pipe and nozzle component (contain jet pipe converging portion, jet pipe expansion segment and press in pressurize diaphragm between the two), it is characterized in that being contained in the Non-return air valve that is used to charge into combustion gas/air on the pipe of combustion chamber and is contained in the ignition system (containing spark plug, power supply and ignition controller) that is used to light combustion gas and air mixture on the base.Transmitter of the present utility model also comprises launching tube and the Fast Interface of Pipeline that is connected with the combustion chamber, and its annex is useful on the Pressure gauge of measuring burning indoor fuel gas/air initial pressure.

The utility model compared with prior art, its remarkable advantage is:

Since the utility model fuel used in not sulfur-bearing and other metal ingredients, thereby do not have sulfide and metal oxide in the combustion product.Because of solid constituents such as sulfur-bearing, charcoal and potassium nitrate not in fuel used, be gaseous state shape reactant fully again, and combustion gas and air reasonable mixture ratio, mixing fully, combustion velocity is fast, thus in the combustion product, carbon monoxide and nitrogen oxide equal size are very low.The product that the utility model emitted just is water and carbon dioxide basically.

2. same because the fuel used characteristic of the utility model does not exist solid or gas soluble particle in the combustion product.Therefore, the launch site does not just have black smog and occurs, and the visibility of original air can not be affected.

3. because the calorific value of the used combustion gas of the utility model is more than ten times of black powder calorific value, and the efficient of the combustion reaction of combustion gas/air is also more much higher than the black powder.The gas consumption that reaches same effect seldom, and is and cheap, thereby can reduce the cost of display shell emission.

From above three as can be seen the utility model have environmental protection and economic benefit.

Four description of drawings

Accompanying drawing is a structural representation of the present utility model.Mark among the figure: 1. display shell, 2. launching tube, 3. jet pipe expansion segment, 4. Fast Interface of Pipeline, 5. pressurize diaphragm, 6. jet pipe converging portion, 7. Non-return air valve, 8. combustion chamber pipe, 9. base, 10. spark plug, 11. lead, 12. ignition controllers, 13. power supplys, 14. Pressure gauges.

Five specific embodiment

Operating procedure of the present utility model:

With pressurize diaphragm clamping between jet pipe converging portion and jet pipe expansion segment, air tight to guarantee combustion chamber sealing.The burst pressure of pressurize diaphragm is designed to 70～80% of the final combustion pressure that reaches in the combustion chamber.

2. in the combustion chamber, be taken up in order of priority by predetermined combustion gas/air proportioning by an end Non-return air valve and fill into combustion gas (natural gas or liquefied petroleum gas, also available methane or propane) and air, record the pressure that charges into from other end Non-return air valve with Pressure gauge (getting final product) with the air pressure in tyres of vehicle table.

3. by Fast Interface of Pipeline launching tube and combustion chamber are linked together.

4. display shell is put into launching tube.Guarantee that regularly lead-in wire makes to be positioned at the jet pipe expansion segment down.

5. connect the lead of spark plug and ignition controller, starting ignition control handle then, by the electric spark combustion gas/air Mixture of igniting, thereby combustion reaction rapidly forms gases at high pressure, breaks through the pressurize diaphragm, and the promotion display shell is thrown in the air.High-temperature gas also will ignite and regularly go between simultaneously, make the fireworks display resilience energy detonate at predetermined altitude, show design.

In order to make combustion reaction in full force and effect, adopt theoretical combustion gas/air proportioning usually.If use natural gas (main component is methane), then using the gram molecule proportioning (also being intrinsic standoff ratio or volume ratio) of combustion gas/air is 1: 9.53.If use liquefied petroleum gas (main component is propane), the gram molecule proportioning of its combustion gas/air is 1: 23.8.In actual use, the ratio of inflation has certain variation to allow, and excursion can reach 5～8%.But for well, can not cause the combustion gas reaction so not exclusively with air excess, produce pernicious gases such as carbon monoxide, yet waste that can combustion gas.

Display shell obtainable initial velocity depend on the pressure behind the mixture combustion and the volume of combustion chamber, and combustion back pressure depends on the gross pressure of gaseous mixture before the burning.This stagnation pressure is big more, and initial velocity is big more.In the practicality, regulate initial velocity with the inflation stagnation pressure.

With 4 inches display shells is example, and the combustion chamber internal diameter of used combustion gas transmitter is 110mm, and inner equivalent length is 150mm.When using natural gas, the pressure that charges into the burning indoor fuel gas earlier is 0.018MPa, and ratio on request charges into compressed air, makes that gross pressure reaches 0.19MPa in its combustion chamber; When using liquefied petroleum gas, the dividing potential drop that charges into liquefied petroleum gas is 0.008MPa, and the gross pressure that charges into behind the air is 0.19MPa.For 4 inches display shells of 0.37kg, the combustion pressure of combustion chamber can reach 2MPa, can obtain the initial velocity about 100m/s after by the launching tube of 1.2m, is that the flying height of display shell can be greater than 200m.

Claims

1, a kind of combustion gas display shell transmitter, comprise combustion gas/air hybrid combustor of forming by base (9), combustion chamber pipe (8), jet pipe converging portion (6), pressurize diaphragm (5), jet pipe expansion segment (3), it is characterized in that pressurize diaphragm (5) being clamped by the threaded engagement between jet pipe converging portion (6) and the jet pipe expansion segment (3), guarantee before burning air tight, 70～80% of the maximum pressure the when burst pressure of pressurize diaphragm (5) should be the burning of setting.

2, combustion gas display shell transmitter according to claim 1 is characterized in that being equipped with on the base (9) spark plug (10), by spark plug (10) and lead (11), and ignition controller (12), power supply (13) is formed ignition system.

3, combustion gas display shell transmitter according to claim 1 is characterized in that on the combustion chamber pipe (8) two Non-return air valves (7) being housed, and is respectively applied for to charge into combustion gas/air and with the pressure in Pressure gauge (14) the mensuration combustion chamber.

4, combustion gas display shell transmitter according to claim 1 and 2 is characterized in that Fast Interface of Pipeline (4) couples together combustion chamber pipe (8) and launching tube (2).