JPH04321900A - Cylinder for gas torch - Google Patents

Abstract

PURPOSE:To increase a liquefied gas receiving capacity of a gas cylinder for a gas torch and improve the efficiency of using the liquefied gas by preventing liquid raw gas from outflow without using any absorbent. CONSTITUTION:A liquefied gas cylinder 10 is constituted such that a hollow float 23 connected to a nozzle 13 of a torch body through a tube 21 is enclosed in the gas cylinder.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small gas torch used in various piping works, various sheet metal works, do-it-yourself work, etc., and more particularly to a liquefied gas cylinder. Propane, butane, or a mixture thereof is generally used as a gas source for such a gas torch. The torch gas is stored in a liquefied state in a pressurized gas cylinder, and this gas cylinder is detachably attached to the torch body so that it can be replaced when the gas runs out.

0002

[Prior Art] Gas cylinders for gas torches are sometimes used with the torch body upside down depending on the situation at the work site, so even in such an orientation the liquefied gas does not drip from the torch burner part in the form of raw gas. (in this case the torch gas will go out)
Generally, as shown in FIG. 4, a cylinder 10 is filled with an absorbent material 11 such as sponge or styrofoam.

That is, the liquefied gas in the cylinder 10 is impregnated into the absorbent material 11, and the gas vaporized from there is passed through the nozzle 13.
It is supplied to the torch body 15 via. Therefore, even if the torch body is turned upside down (see FIG. 2), that is, even if the cylinder 11 is placed above the torch body 15, the raw gas is prevented from directly flowing into the torch body.

0004

However, in conventional liquefied gas cylinders, as shown in FIG. 4, since the entire cylinder 10 is filled with absorbent material 11, the essential liquefied gas storage capacity is reduced. As a result, there was a problem in that the effective amount of liquefied gas contained in the cylinder became small. In addition, such gas cylinders have the problem that they can no longer be used when the remaining amount of liquefied gas decreases, and the cylinder must be thrown away even though a certain amount of liquefied gas remains.

[0005]

[Means for Solving the Problems] The purpose of the present invention is to solve the problems of the prior art as described above, and to develop a gas cylinder that can prevent liquefied gas from flowing into the torch body without using an absorbent. , thereby increasing the filling amount of liquefied gas and increasing the efficiency of using liquefied gas.

In order to achieve the above object, the torch cylinder according to the present invention is characterized in that it incorporates a hollow float connected to a nozzle via a tube. Preferably, the float is formed by a hollow sphere. The float has a weight floating on the liquefied gas surface and located on the southern hemisphere side (inside the liquid phase) and a gas intake port located on the northern hemisphere side (inside the gas phase). Preferably, a filter is attached to the gas intake.

[0007]

[Operation] The float always floats on the horizontal liquid surface regardless of the attitude of the gas cylinder, so vaporized gas is taken in from the gas intake port located on the northern hemisphere side, that is, on the gas phase side, and supplied to the nozzle via the tube. I can do it. That is, due to the action of the weight submerged in the liquefied gas, the gas intake port of the float is always located on the gas phase side, so that the liquefied gas is substantially prevented from flowing into the float. Further, by providing a filter at the gas intake port, it is possible to prevent foreign matter from flowing into the torch body via the float. This filter is not necessarily required if the gas intake port is small.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, according to the present invention, a hollow float 23 connected to a nozzle 13 via a tube 21 is built into a liquefied gas cylinder 10. Float 23
preferably consists of a hollow sphere. Therefore, when the cylinder 10 is filled with a liquefied gas mixture 27 of propane gas and butane gas, for example, the float 23 floats on the liquid surface.

In its floating state, the float 23 is attached to the gas intake port 29 located on the gas phase side, that is, on the northern hemisphere side, and on the liquid phase 25 side, that is, on the southern hemisphere side that is submerged in the liquefied gas 27. It has a weight 31 made of, for example, lead. As a result, the float 23 always remains at the gas intake 2
9 will float above the liquid surface so that it is above the liquid level. In other words, the normal usage state shown in FIG. 1 (torch body 15 is on the top), the upside down usage state as shown in FIG. ), the float 23 always floats on the liquid surface with its gas intake port 29 positioned above the liquid level L.

[0010] Therefore, regardless of the state of use of the torch, that is, the orientation thereof, the gas intake port 29 is located on the side of the gas phase 25, so that the liquefied gas 27 flows from the gas intake port 29 through the tube 21 to the nozzle 13. There will be no inflow. The float 23 can be made of plastic, for example. (Preferably, a filter 28 is attached to the gas intake port 29 to prevent foreign matter from entering.)

The tube 21 is flexible and deforms to follow the float 23 which moves up and down in response to changes in the liquid level L. The length is such that the float 23 reaches the bottom of the cylinder 10 when the liquefied gas 27 is reduced to near the bottom of the cylinder 10, that is, when the liquefied gas 27 is almost completely used up. Note that the weight 31 may be fixedly installed inside the hollow float 23 so as not to block the entrance of the tube 21.

Although the present invention is directed to the internal structure of the gas cylinder 10 and not to the internal structure of the torch body 15 itself, the structure of the gas torch will be briefly described below. Note that this internal configuration itself is known. The gas cylinder 10 is detachably attached to the torch body 15 by tightening the attachment nut 41. The upper end opening of the cylinder 10 is closed by a cap 43, and the nozzle 13 is integrally formed in this cap 43. Note that 45 is a seal provided between the cap 45 and the upper end of the cylinder 10. The nozzle 13 is attached to an injection valve 49, which is fixed to the torch body 15.

An operating knob 8 is provided at the rear end of the torch body 15 to allow gas to flow into the torch body.
By turning this knob 8 in one direction with your finger, a first valve (not shown) in the torch body opens, and the pressurized gas in the tank 10 flows through the nozzle 13 and the passage 53 in the injection valve 49 to the first valve (described later). It flows into the torch body 15 up to the position of the second valve. Furthermore, by turning the knob 8 in the other direction, the first valve can be closed and the inflow of gas can be stopped.

A second valve (not shown) is provided in the gas passage within the torch body 15, and the second valve is opened by pressing the bellows-like operating lever 6, which corresponds to the trigger of a pistol, with a finger. The gas that has reached this side of the second valve is vigorously jetted out from the burner section 4 attached to the tip of the torch body 15. One end of the tube 21 of the present invention is the nozzle 1
3 should be installed integrally.

[0015]

[Effects of the Invention] As described above, according to the present invention,
By providing a float in the gas cylinder whose gas inlet is always located above the liquid level, liquefied gas is prevented from flowing into the torch body regardless of the usage state of the torch, that is, regardless of the attitude of the cylinder. In the present invention, an absorbent material 11 as shown in FIG.
Since there is no need to fill the cylinder with liquefied gas, the liquefied gas capacity of the cylinder 10 can be increased compared to before. Further, according to the present invention, since the float moves downward as the liquefied gas in the cylinder decreases with use, the cylinder can be used until the liquefied gas is virtually completely exhausted.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing a liquefied gas cylinder according to the present invention attached to a torch body.

FIG. 2 is a view similar to FIG. 1 showing the torch body in an upside down state;

FIG. 3 is an illustrative view of the main parts showing the gas cylinder in a horizontal position.

FIG. 4 is a sectional view of a main part of a conventional gas torch.

[Explanation of symbols]

10... Gas cylinder body 15...Torch body 21...Tube 23...Floater 28...filter 29...Gas intake port 31...Weight

Claims (4)

[Claims] [Claim 1] A nozzle (1
3) A liquefied gas cylinder for a gas torch that supplies gas through a tube (21), which is characterized by incorporating a hollow float (23) connected to the nozzle through a tube (21). 2. The liquefied gas cylinder according to claim 1, wherein the float is formed by a hollow sphere. 3. A claim characterized in that the float has a weight (31) located on the southern hemisphere side while floating on the liquefied gas liquid surface and a gas intake port (29) located on the northern hemisphere side. 2. The liquefied gas cylinder according to 2. Claim 4: The gas intake port has a filter (2
8) is attached to the liquefied gas cylinder according to claim 3.