JPS6242255Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application field>> This invention relates to a nozzle structure for a gas burner, and more specifically, it is used for treatment by dentists, denture molding by technicians, or metal fitting. The present invention relates to a gas burner nozzle structure suitable for use.

<Prior Art> In the conventional nozzle structure for gas burners, a rod-shaped nozzle is fixedly disposed inside a vertically long tubular body that is connected to a gas pipe and has a closed bottom so that gas is supplied inside. An adjustment cap having a small hole formed in the center of the top surface is screwed into the upper opening of the tubular body, the pointed upper end of the rod-shaped nozzle is fitted into the small hole of the adjustment cap, and the adjustment cap is rotated. By this, the gap between the pointed upper end of the rod-shaped nozzle and the small hole was made variable, and the amount of gas ejected through this gap was freely adjustable. Or also,
A rod-shaped nozzle housed in a tubular body is connected so that it can be moved up and down by rotating an adjustment screw provided on the outside, while a cap with a small hole formed in the center is fixedly attached to the upper end of the tubular body. The amount of gas ejected can be adjusted by rotating the adjustment screw to change the gap between the pointed upper end of the rod-shaped nozzle and the small hole.

In this way, the amount of gas ejected is adjusted by turning the adjustment cap in the former case and the adjustment screw in the latter case, so if you once adjust it and stop the gas by tightening the adjustment cap or adjustment screw, it will not change again. It is troublesome and difficult to adjust to obtain the same amount of gas ejected by loosening the Therefore, dentists and other dentists leave the gas burners on all day by loosening the adjustment caps or adjustment screws, which is not only extremely uneconomical, but also causes combustible materials such as curtains in the room to be blown away by the wind. fanned close to this fire,
There was a risk that it could be ignited and cause a fire.

《Purpose of the invention》 The present invention was devised in view of the above-mentioned problems.The purpose of the invention is to always shut off gas ejection, and when necessary, to release a preset amount of gas by operating a switch means. To provide a nozzle structure for a gas burner which is economical and free from the danger of fire unlike the conventional one, in which gas is ejected and ignited, eliminating the need for adjusting the amount of gas ejected each time ignition occurs.

<Means for Solving the Problems> According to the nozzle structure for a gas burner according to the present invention, the piston nozzle can be moved vertically within the vertically elongated tubular body formed so that gas is supplied inside. and an elastic means for constantly urging the piston nozzle upward; a small hole that is always sealed by the piston nozzle is provided at the upper end of the tubular body; An adjustment ring whose lower part is a closed cylinder is screwed to the lower end to make the vertical position variable, and the lower end of the piston nozzle is made of a magnetic material, and the adjustment ring has a closed cylinder. An electromagnetic coil that surrounds the lower part of the closing tube is attached to the outside of the adjustment ring, and the electromagnetic coil is connected to a switch means and an electric current. It is connected to each other.

As a result, when the electromagnetic coil is excited by the switch means, the lower end of the piston nozzle is magnetically attracted and lowered to a position where it abuts the inner bottom of the closed cylinder part of the adjustment ring, and the upper end of the piston nozzle is opened separately from a small hole in the tubular body, and the gas inside is blown out from the small hole.

<<Embodiments>> Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates a vertically elongated tubular body, and a connecting pipe 2 is integrally formed on one side of the tubular body 1, and this connecting pipe 2 is connected to a gas such as city gas or propane gas through a hose 3. It is connected to a supply source so that gas can be supplied to the interior of the tubular body 1. The top and bottom of this tubular body 1 are open, and a rod-shaped piston nozzle 4 having a diameter sufficiently smaller than that of the tubular body 1 is housed inside the tubular body 1 so as to be movable in the vertical direction. The tip 4a of this piston nozzle 4 is formed into a pointed shape, and a flange 4 is provided in the middle of the tip 4a.
b is formed, and a spring 5 having relatively weak elasticity is interposed between the flange 4b and the shelf 1a formed inside the tubular body 1, and constantly urges the piston nozzle 4 upward. ing. Further, the lower end of the piston nozzle 4 protrudes below the tubular body 1,
A magnetic projection piece 6 is integrally attached here.

A first screw wire 1b is provided at the upper end of this tubular body 1.
is formed, and the adjustment cap 7 is screwed here.
This adjustment cap 7 can be moved up and down by rotating it. This adjustment cap 7 has a small truncated conical hole 8 formed on its top surface.
The tip 4a of the piston nozzle 4 is always tightly fitted into this small hole 8 to close it. Further, a second screw wire 1c is formed at the lower end of the tubular main body 1, and the adjustment ring 9 is screwed into the second screw wire 1c, so that it can be moved up and down. The lower part of this adjustment ring body 9 has a closing cylinder part 9a that protrudes downward.
The magnetic protrusion 6 of the piston nozzle 4 is located within this closing cylinder 9a, and there is always a gap between the inner bottom surface of the closing cylinder 9a and the lower end of the magnetic protrusion 6 as shown in FIG. A void a is formed. The length of the gap a in the vertical direction can be adjusted as appropriate by rotating the adjustment ring 9.

An electromagnetic coil 10 is closely fitted on the outer periphery of the closing tube 9a outside the adjustment ring 9, and is connected to appropriate switch means (not shown). Preferably, an ignition means is provided in conjunction with this switch means, and this ignition means is provided, for example, as a discharge needle 12 inside a cylindrical body 11 screwed onto the upper end of the adjustment cap 7.

<<Operation>> Since the gas burner nozzle of the present invention is constructed as described above, the piston nozzle 4 is normally pushed upward by the compression spring 5, as shown in FIG. It closes the small hole 8 of the adjustment cap 7, blocking the gas from blowing out. The vertical position of the adjustment ring 9 screwed onto the lower end of the tubular body 1 is adjusted in advance, and the vertical interval of the space a therein is set. In the state shown in FIG. 2, a switch means connected to the electromagnetic coil 10, such as a foot switch, a proximity switch, a photoelectric switch, etc., which is activated when a processing tool approaches the burner, is turned on, and the electromagnetic coil 10 is turned on. When a current flows through the magnetic protrusion 6 at the lower end of the piston nozzle 4,
is absorbed downward by the electromagnetic force against the elastic force of the spring 5, and as shown in FIG. The tip 4a of the piston nozzle 4 is separated from the small hole 8 of the adjustment cap 7 by being lowered until it comes into contact with the inner bottom surface of the part 9a, so that a gap is formed therebetween, through which the gas is jetted out. become. At this time, the ignition means interlocked with the switch means is activated, causing sparks to fly from the discharge needle 12 and igniting the ejected gas. On the other hand, in the case of operating a foot switch, the aforementioned proximity switch, or photoelectric switch, when the processing tool leaves the burner, the switch means is operated again and the current supplied to the electromagnetic coil 10 is cut off, so that the piston nozzle 4 is raised by the force of the spring 5, and its tip 4a closes the small hole 8 of the adjustment cap 7, so that the ejection of gas is automatically shut off.

If you want to readjust the gas ejection amount for some reason while the gas is ignited, rotate the adjustment cap 7 and connect the tip of the piston nozzle 4 and the adjustment cap 7.
The gap between the small hole 8 and the small hole 8 may be adjusted.

<<Effect>> As described above, in the gas burner nozzle structure of the present invention, by adjusting the adjustment ring 9 and setting the amount of gas ejected when necessary in advance, the switch means can be turned on. The desired amount of gas can be ejected at any time, while the switch means is "off"
It is possible to automatically stop gas ejection when the condition is reached. Therefore, a foot switch that is turned on only when the switch means is stepped on with the foot, or a proximity switch that is turned on only when the heating tool is brought close to the burner may be used. By using a photoelectric switch or the like, a certain amount of gas is ejected and ignited only when necessary, making it extremely economical and less dangerous. The amount of gas ejected can be finely adjusted by rotating the adjustment ring 9, and once it has been adjusted and set, it remains unchanged until it is adjusted again. The gas burner nozzle can be made suitable for use by technicians in denture molding, metal preparation, and the like.

[Brief explanation of the drawing]

Fig. 1 is an exploded cross-sectional view of the gas burner nozzle of the present invention, Fig. 2 is a cross-sectional view of the gas burner nozzle of the present invention when not in use, and Fig. 3 is a use of the gas burner of the present invention. FIG. 1... Tubular body, 4... Piston nozzle, 5...
... Spring, 6 ... Magnetic protrusion, 7 ... Adjustment cap, 8 ... Small hole, 9 ... Adjustment ring, 10 ...
electromagnetic coil.

Claims (1)

[Claims for Utility Model Registration] (1) A piston nozzle is arranged to be movable in the vertical direction in a vertically elongated tubular body formed so that gas is supplied therein, and the piston nozzle is always kept upward. an elastic means for biasing is provided, and a small hole is provided at the upper end of the tubular body so as to be always sealed by the piston nozzle;
An adjustment ring whose lower part is a closed cylinder is screwed onto the lower end of the tubular body to make the vertical position variable, and the lower end of the piston nozzle is made of a magnetic material, and the adjustment ring is closed. The adjustment ring is partially located inside the cylinder and is normally separated from the inner bottom surface of the cylinder, and an electromagnetic coil surrounding the lower part of the closing cylinder is attached to the outside of the adjustment ring. when the electromagnetic coil is excited by the switch means, the magnetic coil is magnetically connected to a position where the lower end of the piston nozzle abuts the inner bottom of the closing barrel of the adjustment ring. A gas burner characterized in that the upper end of the piston nozzle is opened separately from the small hole of the tubular body, and the gas inside is spouted to the outside from the small hole. Nozzle structure for. (2) An adjustment cap is screwed onto the upper end of the tubular body, the small hole is formed on the top surface of the adjustment cap, and the upper end of the piston nozzle has a pointed shape and can freely move in and out of the small hole. A nozzle structure for a gas burner according to claim 1, which is characterized in that: