JPH07260111A - Flame thrower - Google Patents

Abstract

PURPOSE:To prevent the danger of backfire from occurring at an air suction port effectively by the synergistic effect of a porous distance body provided at the deep part of a flame port and a flame releasing tube, enveloping the flame nozzle, in a simplified flame thrower, employed for grass burning, insectisizing and the like. CONSTITUTION:A flame thrower is constituted of a gas ejection nozzle 3, arranged so as to be faced to the base end opening of a blowing pipe 1, a gas supplying source or a replaceable gas bomb 5, a flame port nozzle 4, provided at the tip end of the blowing pipe 1 and an outside air suction port 14, introducing outside air and provided at the base end opening of the blasting pipe. Further, the flame thrower is provided with a porous distance body 30, provided at a gas flowing position, through which the blowing pipe 1 is communicated with the flame port nozzle 14, and a flame releasing tube 35, enveloping the flame port nozzle Al.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame radiator which is equipped with a replaceable gas cylinder as a gas supply source and is used, for example, for weeding, insecticidal and charcoal raising.

[0002]

2. Description of the Related Art Conventionally, there has been provided a simple flame radiator using a replaceable gas cylinder as a gas supply source. The flame radiator has a gas injection nozzle directed toward a base end opening of a blower pipe. An intake port for taking in the outside air is provided at the same place, a mixed gas of gas and the outside air is taken in from the base end opening of the blowing pipe, and a flame is emitted from a crater nozzle provided at the tip of the blowing pipe.

[0003]

In the flame radiator of the above structure, when the fire is extinguished, it causes a backfire at the intake port, and although it is not actually dangerous, this backfire occurs at the intake port at hand. In addition, there is a concern that the gas cylinder may catch fire because it is close to the gas injection nozzle and the gas cylinder, which causes unnecessary anxiety that there may be a safety problem. . In addition, it is overlooked as a trouble and becomes a factor to prevent the spread.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned concerns of users and solve the problems. As a means thereof, a combustible gas from the replaceable gas cylinder is ejected from a gas ejection nozzle. Through the blower tube toward the base end opening of the blower tube, and the tip of the blower tube is provided with a crater nozzle, and the outside air is taken into the blower tube at the portion where the gas blowout nozzle ejects a combustible gas to the base end opening of the blower tube. In a flame radiator in which an intake port is provided and flammable gas and outside air are taken in from the base end opening of the blow tube to cause flame emission from the fire nozzle at the tip of the blow tube, the blow tube and the fire nozzle communicate with each other. In addition to disposing a multi-pore partition made of a mesh material or a multi-pore plate in the gas flow portion, a flame releasing cylinder that contains the crater nozzle is provided, and the mesh material or multi-pore plate having the above arrangement It is obtained as effectively solve the above backfire problems in synergy with.

Further, according to the present invention, the base end extending portion of the blow pipe is constituted by a gas introduction pipe having a small diameter, and the net material or the multi-pore plate is provided.
The problem of the backfire is effectively solved by the synergistic action of the flame releasing cylinder and the small-diameter gas introduction pipe.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A flame radiator according to an embodiment of the present invention will be described below with reference to the sectional view of another sheet.

The flame radiator comprises an elongated blow tube 1, a gas ejection nozzle 3 arranged toward a base end opening 2 of the blow tube 1, and a crater nozzle 4 attached to the tip of the blow tube 1, and further a gas. A replaceable gas cylinder 5 as a supply source is provided.

The gas injection nozzle 3 is provided at the center of the tip surface of a cylindrical envelope 6 having a gas on-off valve built therein so as to project from the blow tube 1.
A gas inlet port 7 for receiving the opening / closing nozzle 10 of the gas cylinder 5 is arranged at the center of the base end face of the cylindrical envelope 6 which is arranged so as to eject gas toward the base end opening 2 of the cylinder. Set up.

The opening / closing nozzle 10 of the gas cylinder 5 is retracted by pushing the nozzle 10 into the gas inlet 7 to enable gas supply.

Reference numeral 8 denotes a cylinder case that accommodates the gas cylinder 5 in a replaceable manner. The cylinder case 8 has a handle 9
And a cylinder replacement lid 11 is provided at the rear end of the case. When the gas cylinder 5 is housed in the cylinder case 8, the cylinder replacement lid 11 presses the cylinder 5 while supporting the rear surface of the cylinder 5 to retract the opening / closing nozzle 10 to release the gas in the cylinder.

The gas ejection nozzle 3 and the envelope 6 containing the on-off valve form a gas on-off valve structure 12 as a gas supply medium between the gas cylinder 5 and the blow pipe 1, and this structure, that is, the envelope. 6 is provided with a gas opening / closing operation knob 38 protruding outward. The gas opening / closing operation knob 38 is a means for adjusting the supply amount of the combustible gas supplied to the blow pipe 1 by the screwing amount thereof and for stopping the supply.

There is a slight gas ejection interval 13 between the gas ejection nozzle 3 of the gas on-off valve structure 12 and the base end opening 2 of the blower pipe 1, and the base end opening of the blower pipe 1 is at this gas ejection interval 13. An intake port 14 for taking in outside air is provided in the section 2.

Therefore, the outside air is sucked from the intake port 14 by the flow velocity of the gas jetted from the gas jet nozzle 3, and the combustible gas and the outside air become a mixed gas and are introduced into the base end opening 2 of the above-mentioned blow pipe 1, and the blow pipe is blown. It flows through the inside of 1 toward the crater nozzle 4.

As a means for providing the intake port 14, an air sampling case 15 that surrounds the base ends of the gas ejection nozzle 3 and the blow tube 1 is provided, and the tip of a connecting cylinder portion 16 provided at the center of the gas sampling case 15. The blow tube 1 is inserted into and screwed together, and the envelope 6 of the gas on-off valve structure 12 is provided at the base end.
An on-off valve case 17 for accommodating the above is integrally connected, and the gas ejection nozzle 3 of the on-off valve structure 12 accommodated in the on-off valve case 17 is exposed to the inside of the connecting cylinder portion 16. The intake port 14 for introducing outside air is opened.

The tip of the gas ejection nozzle 3 projects into the opening region of the intake port 14, and the gas ejection velocity promotes the intake of the outside air from the intake port 14. Therefore, the combustible gas ejected from the gas ejection nozzle 3 and the outside air sucked from the intake port 14 are mixed in the connecting cylinder portion 16 and introduced from the base end opening 2 of the blow pipe 1.

An inner boss portion (joint opening) 18 and an outer boss portion (joint opening) 19 which is concentric with the inner boss portion 18 are integrally connected to the tip of the air sampling case 15, and the inner pipe portion 1 has a blow pipe 1 The base end part of is inserted and screwed and connected. On the other hand, an outer cylinder 20 that surrounds the blow pipe 1 over the entire length is provided, and the base end of the outer cylinder 20 is externally inserted into the outer boss portion 19 and fixed by screwing or the like, and the tip 26 of the crater nozzle 4 is fixed. The outer cylinder 20 is projected from the tip.

The outer cylinder 20 and the blow tube 1 extend concentrically,
A tubular gap 21 is formed between the two 20 and 1, and a piezoelectric ignition wire 22 and a gas reflux thin tube 23 extend along the blow tube 1 in the tubular gap 21, and the tips thereof are respectively connected to the crater nozzle 4. Keep it nearby.

That is, a switch case 25 containing a piezoelectric ignition switch 24 is integrally provided on the outside of the air collection case 15, and the piezoelectric ignition wire 22 connected to the piezoelectric ignition switch 24 is extended from the switch case 25. A spark generating electrode 27 is provided at the tip of the piezoelectric ignition wire 22.

Accordingly, the base end of the piezoelectric ignition wire 22 is connected to the ignition switch 24, and the end thereof is connected to the spark generating electrode 27 to generate a spark with the spark generating flange 39 mounted on the outer circumference of the crater nozzle. A push button 28 operates the ignition switch 24.

The thin tube 23 for circulating gas is extended along the inside of the gap 21 from the envelope 6 forming the on-off valve structure 12, and the tip thereof is arranged near the tip 26 of the crater and is radiated from the tip 26 of the crater. The combustible gas is heated by a flame and then recirculated into the envelope 6 forming the on-off valve structure 12, and the heated combustible gas is blown through the gas jet nozzle 3 into the blow pipe 1
It is configured to eject into the base end opening 2.

A multi-pore separator 30 is provided at a gas flow passage where the tip of the blow tube 1 and the crater nozzle 4 communicate with each other. The multi-pore separator 30 is formed of a net material as shown. Alternatively, the multi-pore separator 30 is formed of a multi-pore plate having a large number of through holes. Therefore, the combustible gas ejected from the tip end opening portion 29 of the blow tube 1 passes through the multi-pore partition 30 installed so as to cover the opening portion 29 and is ejected from the crater tip 26 to be burned.

More specifically, referring to an embodiment, the crater nozzle 4 has a boss portion (joint tube mouth) 31 connected to the base end thereof, and the boss portion 31 is externally fitted to the tip end portion of the blow pipe 1. While being screwed together, the tip end surface of the blow tube abuts against an annular step portion 32 provided on the inner peripheral surface of the boss portion 31, and the peripheral edge portion of the multi-pore partition 30 made of the mesh material is interposed between the abutting surfaces. And pinch.

Preferably, as shown in the drawing, a ring-shaped seat plate 33 having a diameter larger than that of the blow pipe 1 is filled on the tip end surface of the blow pipe 1, and the ring-shaped seat plate 33 is made of the mesh material and has a multi-pore partition 30.
And the both 33 and 30 are interposed between the annular step portion 32 of the crater nozzle 4 and the end surface of the blow tube, and the crater nozzle 4 is connected to the blow tube 1
The both 33, 30 are tightened by screwing on the tip of. With this structure, the fastening and assembling can be easily achieved only by interposing the mesh material when screwing the crater nozzle 4 into the blow tube 1.

Then, the gas opening / closing operation knob 38 is tightened to shut off the gas, and the flame 34 emitted from the crater tip 26 is released.
When the fire is extinguished, the backfire at the intake port 14 is completely prevented by the arrangement of the multi-pore partition 30.

As a means for complementing the backfire prevention effect, a flame releasing tube 35 having a diameter larger than that of the outer tube 20 in which the crater nozzle 4 can be contained is provided. The flame releasing cylinder 35 is externally attached and screwed to the ring 40 externally attached and screwed to the tip of the outer cylinder 20. Therefore, the flame releasing tube 35 has its base end portion externally inserted into the tip end portion of the outer tube 20 and extends toward the tip of the crater nozzle 4, and the flame released vigorously from the crater tip 26 is this flame releasing. It passes through the inside of the cylinder 35 and is radiated outward. The flame releasing cylinder 35 prevents the influence of the external air flow, enables stable flame radiation, and helps prevent the backfire from the intake port 14 at the time of extinguishing the fire.

Further, as another means for complementing the backfire prevention effect, the extending portion on the base end side of the blow tube 1 is formed by a gas introduction pipe 36 having a small diameter. That is, the blow tube 1 is formed by a gas introduction pipe 36 having a small diameter at the base end side extension portion thereof, and a large diameter blow tube main body 37 on the tip side is externally inserted into the gas introduction pipe 36 to attach an adhesive or the like to the insertion interface. To make it airtight.

The gas ejection nozzle 3 is arranged so as to eject a combustible gas toward the base end opening 2 of the small-diameter gas introduction pipe 36. Even if a weak backfire may occur through the multi-pore diaphragm 30, the gas flow of the backfire is limited by the small-diameter gas introduction pipe 36, so that it is effective to backflow into the pipe 36. To be prevented.

Therefore, the concern about backfire at the intake port 14 is the cooperation of the multi-pore partition 30 and the flame release tube 35, or the multi-pore partition 30, the flame release tube 35, and the gas introduction pipe 36.
And are complementarily and reliably prevented.

[0029]

As described above, according to the present invention, the combustible gas from the replaceable gas cylinder is jetted toward the base end opening of the blow pipe through the gas jet nozzle, and the tip of the blow pipe is provided with the crater nozzle. Further, at the site where the gas injection nozzle injects the combustible gas into the base end opening of the blower pipe, an intake port for taking in the outside air into the blower pipe is provided, and the combustible gas and the outside air are taken in through the base end opening of the blower pipe, In a flame radiator which is designed to generate flame radiation from the tip nozzle, the concern of backfire at the intake port 14 may be due to the synergistic effect of the multi-pore partition 30 and the flame releasing tube 35 or the multi-pore partition 30. It is effectively and surely prevented by the synergistic effect of the flame releasing cylinder 35 and the gas introduction pipe 36.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a flame radiator according to the present invention.

[Explanation of symbols]

 1 Blown Pipe 3 Gas Jet Nozzle 4 Crater Nozzle 5 Gas Cylinder 14 Inlet 30 Multi-hole Separator 35 Flame Arrangement 36 Gas Introduction Pipe

Claims (2)

[Claims] 1. A blowout tube base end opening provided with a gas ejection nozzle arranged toward a base end opening portion of the blower tube, a replaceable gas cylinder serving as a gas supply source, and a crater nozzle provided at a tip end of the blower tube. In a flame radiator including an intake port for introducing outside air into a portion, a flame releasing cylinder that includes a multi-pore partition at a gas flow passage where the blow pipe and the crater nozzle communicate with each other and encloses the crater nozzle A flamethrower characterized by being provided with. 2. The flame radiator according to claim 1, wherein the base end extending portion of the blow tube is a gas introduction pipe having a small diameter.