JPH0512587Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a burner used for purposes similar to torch lamps used for piping work, sheet metal work, heat treatment work of small items, etc. This invention relates to a small burner that is used by holding and holding a gas cylinder that is attached to the tank.

<Prior Art> As is well known, small burners that are used by holding a gas cylinder by hand are used by turning the gas cylinder upside down or tilting it so that it faces in all directions. If the gas cylinder is tilted and the liquefied gas is sent to the injection nozzle while still being liquefied, the liquefied gas will be wasted and wasted.
The flame may become extremely large or disappear, which poses a major safety issue. For this reason, conventional small burners, for example,
A gas cylinder as described in Publication No. 133897 is used.

This gas cylinder is made by filling the cylinder with an adsorbent made of cotton-like pulp and water-absorbing paper, and allowing the adsorbent to soak in the liquefied gas. Only vaporized gas is supplied from the gas cylinder, and the liquefied gas comes out as a liquid. It seems like there is no such thing.

<Problem to be solved by the invention> In a gas cylinder filled with an adsorbent that adsorbs liquefied gas, the amount of gas filled is reduced by the amount of adsorbent, so the combustion time is shortened. If the adsorbent is filled into the cylinder on top of that, the manufacturing cost increases accordingly, resulting in an expensive gas cylinder.

Since gas cylinders that are expensive and have a short combustion time are a major practical problem, this invention aims to solve the above-mentioned conventional problems and provide a burner that can be used with inexpensive gas cylinders filled only with liquefied gas. It is.

<Means for solving the problem> The burner of this invention has a diaphragm installed inside the pressure reducing valve body, and the elasticity of the diaphragm is adjusted by the valve stem of the valve body, which is biased by a valve spring, and the rotation of a knob. A pressure reducing regulating valve is attached to the valve body, with a communicating tube protruding from the pressure reducing valve body so that the tip thereof protrudes into the space of the gas chamber formed by the pressure reducing valve body and the diaphragm. It is characterized by:

<Operation> When the gas cylinder is tilted or turned upside down, the liquefied gas liquid that flows in between the valve stems is retained in the gas chamber, and the vaporized gas vaporized in the gas chamber comes out of the communication pipe and is supplied to the injection nozzle. The elasticity of the adjustment spring is controlled by turning the knob, and the vaporized gas coming out of the communication pipe is ejected at a constant pressure, so the size of the flame coming out of the burner nozzle does not change even if the gas cylinder is tilted or turned upside down.

<Embodiment> A female screw hole into which the cylinder 1 is screwed is formed in the lower cylindrical portion of the valve body 3, and a lock nut 4 is screwed onto the outer periphery of the cylindrical portion. The hole in the valve shaft 6 fitted approximately at the center of the lower cylindrical portion, the adjustment valve mounting hole 35, and the injection nozzle mounting hole 31 communicate in a Y-shape as shown in FIG. A flow path is formed. A pressure reducing regulating valve 40 shown in FIG. 2 is screwed into the regulating valve mounting hole 35, and the injection nozzle mounting hole 3
An injection nozzle 21 is screwed onto the 1.

In FIG. 2, the holder 8 with the filter 9 fitted thereto is fitted to the pressure reducing valve body 12, and the valve body 11 inserted into the holder 8 is biased by the valve spring 10 and pressed against the pressure reducing valve body 12 so that gas does not flow out.
The spring cover 15 is screwed onto the pressure reducing valve body 12 from the opposite side of the holder 8, and the disk-shaped diaphragm 1 which expands and contracts between the body 12 and the end face of the spring cover 15 is attached to the pressure reducing valve body 12.
The diaphragm 14 is fixed by clamping the spring cover 15. The adjustment screw 16 is screwed into the spring cover 15.
A spring bearing 20 biased by an adjustment spring 19 is interposed between the diaphragm 14 and the diaphragm 14, and the diaphragm 14 is biased by the elastic force of the adjustment spring 19.
The adjusting screw 16 is clamped between the valve rod 13 and the knob 17 which is fitted to the oval shaped shaft of the adjusting screw 16 and secured with a screw 18.
The adjusting spring 19 has a knob 17 which is integral with the valve body 12 and the diaphragm 14, and the elasticity of the adjusting spring 19 is adjusted by rotating the knob 17. The pressure reducing valve body 12 and the diaphragm 14 form a gas chamber 30 as shown in Fig. 2, and a communicating pipe 33 is provided on the pressure reducing valve body 12 so that its tip projects into the space of the gas chamber 30.

When the sealing member 7 is attached to the pressure reducing valve main body 12 of the pressure reducing regulating valve 40 having such a configuration and the pressure reducing valve main body 12 is screwed onto the valve main body 3, gas will be formed at the bottom of the regulating valve mounting hole 35 as shown in FIG. A space 29 is formed that connects to the hole 36, and the hole of the communication pipe 33 opens to the regulating valve mounting hole 35.

An injection pipe 22 having an appropriate number of intake holes 32 formed therein so as to enclose the injection nozzle 21 is fitted into the valve body 3, and is detachably attached with a set screw 23. A mixing tube 24 is screwed onto the tip of the injection tube 22 with a fixing nut 25.
The burner nozzle 28 is crimped to the flame grate receiver 26 with the flame grate 27 in between, and the flame grate receiver 26 in which these are integrated is screwed.

The above configuration from the injection tube 22 to the burner nozzle 28 is an example of an injection tube for concentrated flame, and if it is desired to obtain a flame such as a spiral flame, a flat flame, or a fine flame, a known injection tube may be used depending on the purpose. Can be used interchangeably.

1 is a known small gas cylinder filled with a mixed gas of butane gas and propane gas or a liquefied gas such as butane gas, and a valve body 2 is built in the cylindrical tip, and the outer circumference of the cylindrical tip is A male thread for mounting is engraved on the. A protrusion is formed concentrically with the cylindrical tip at a distance.

A seal member 5 is attached to the bottom of the female thread of the valve body 3.
After screwing the gas cylinder 1 into place, tighten the lock nut 4 until it comes into pressure contact with the protrusion of the cylinder to fix the gas cylinder 1 to the valve body 3. When the cylinder 1 is fixed to the valve body 3 in an upward state (hereinafter referred to as normal state) as shown in FIG. The hole is filled with vaporized gas. Since it is sealed by the seal members 5 and 7, vaporized gas does not leak to the outside.

When the knob 18 is turned, the adjustment spring 19 is compressed by the adjustment screw 16 and pushes against the diaphragm 14. When the force of the adjustment spring 19 > the force of the valve spring 10 + the gas pressure in the holder 8, the valve body 11 opens and the vaporized gas flows into the gas chamber 3.
Introduced within 0. The vaporized gas enters the gas chamber 30 which was at atmospheric pressure, and the gas pressure in the gas chamber 30 (strictly speaking, the pressure in the gas chamber 30 + the force of the valve spring 10 + the force of the holder 8
When the pressure within) becomes greater than the force of the adjustment spring 19, the diaphragm 14 is pushed up, the valve body 11 is pressed against the pressure reducing valve body 12, and the introduction of vaporized gas into the gas chamber 30 is stopped. In other words, it operates so that the pressure of the vaporized gas in the gas chamber 30 is constant. Therefore, vaporized gas at a constant pressure is ejected from the injection nozzle 21 , and the atmosphere is taken in through the intake hole 32 of the injection cylinder 22 to form a mixed gas, which is ejected from the flame grate 27 . When this mixed gas is ignited, it stably burns in the flame grate 27 and becomes a flame of a predetermined size.

When the valve body 11 is open and the burner cylinder 1 is in a normal state of combustion, hold it and turn the gas cylinder 1 upside down.
flows down the hole and enters the space 29, and the pressure reducing regulating valve 4
0 faces obliquely downward as shown in FIG. 3, the liquefied gas that has passed through the holder 8 flows between the ends of the valve rod 13 and remains in the gas chamber 30. Since the communication pipe 33 protrudes into the gas chamber 30 into the space, the liquefied gas does not flow out from the gas chamber 30 no matter which direction the burner is directed. The liquid gas 34 that has flowed into the gas chamber 30 absorbs the surrounding heat and vaporizes, and the vaporized gas flows through the diaphragm 1.
4 is pushed up, and when the gas pressure in the gas chamber 30 becomes greater than the force of the adjustment spring 19 as described above, the valve body 11 is pressed against the pressure reducing valve body 12 and the flow of the liquefied gas 34 into the gas chamber 30 is stopped. When the liquefied gas in the gas chamber 30 evaporates and the pressure in the gas chamber 30 decreases, the force of the adjustment spring 19 > the pressure in the gas chamber 30 + the force of the valve spring 10 + the liquefied gas pressure in the holder 8. The valve body 11 opens again and the liquefied gas flows into the valve stem 1.
3 into the gas chamber 30. gas chamber 3
The liquefied gas 34 that enters the gas chamber 30 immediately absorbs heat from the surroundings and vaporizes, so the amount of liquefied gas that stays in the gas chamber 30 is small. Since the gas does not flow out, vaporized gas is always ejected from the injection nozzle 21.

The amount of liquefied gas remaining in the gas chamber 30 varies depending on the ratio between the pressure of the liquefied gas in the cylinder 1 and the pressure in the gas chamber 30. When the liquefied gas in the cylinder 1 is made to have a high pressure, the pressure difference between the gas chamber 30 and the gas chamber 30 becomes large.
Since the liquefied gas that has entered the gas chamber 30 instantly turns into high-pressure vaporized gas and closes the valve body 11, the amount of liquefied gas that remains in the gas chamber 30 becomes extremely small. The conductive heat from the burner nozzle 28 is transferred to the valve body 3.
It is also transmitted to the pressure reducing valve body 12. Therefore, the heat of vaporization removed during vaporization in the gas chamber 30 is replenished by this conduction heat, so that the vaporization pressure does not decrease in the gas chamber 30 due to the removal of vaporization heat, and stable pressure vaporization is achieved. Gas is obtained.

Since the pressure reducing valve body 12 with the communicating pipe 33 protruding thereon is screwed onto the valve body 3, the circumferential position of the communicating pipe 33 is not necessarily assembled in the state shown in FIGS. 1 and 2. Even if the communication pipe 33 is protruded from any direction on the outer periphery of the pressure reducing valve body 12, the part of the communication pipe 33 protruding into the space of the gas chamber 30 acts as a dam, so that the liquefied gas is prevented from flowing. There is no leakage from the gas chamber 30. Furthermore, although the above explanation was given regarding the case where the cylinder 1 is held upside down, the liquefied gas that has entered the gas chamber 30 will be vaporized within the gas chamber 30 and will not be injected no matter which direction the cylinder 1 is held. Vaporized gas is constantly ejected from the nozzle 31.

<Effects of the invention> By using the burner of this invention, an inexpensive gas cylinder filled only with liquefied gas can be used, which is economical, and the vaporized gas injected from the injection nozzle can be easily adjusted to a constant gas pressure. Therefore, stable firepower of the flame of the desired size can be obtained and it can be used safely. In addition, since the gas cylinder can be replaced simply by screwing the cylinder onto the valve body, it is easy to handle and extremely practical.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view showing a part of the burner and cylinder in cross section, Fig. 2 is an enlarged sectional view of the pressure reduction regulating valve shown in Fig.
FIG. 3 is an enlarged sectional view of the pressure reduction regulating valve when the burner shown in the figure is used upside down. 1...Gas cylinder, 3...Valve body, 10...
... Valve spring, 11 ... Valve body, 12 ... Pressure reducing valve body, 13 ... Valve stem, 14 ... Diaphragm, 16 ... Adjustment screw, 17 ... Knob, 19 ... Adjustment spring, 30
...Gas chamber, 33...Communication pipe, 40...Pressure adjustment valve.

Claims (1)

[Scope of utility model registration request] In a burner in which a gas cylinder is screwed onto the valve body and vaporized gas is ejected from an injection nozzle, a diaphragm is installed inside the pressure reducing valve body, and the diaphragm is connected to the valve stem of the valve body, which is biased by a valve spring, and the rotation of the knob. The valve body is a pressure reducing regulating valve that is held between an adjusting spring whose elasticity is adjusted dynamically and has a communicating pipe protruding from the pressure reducing valve body so that its tip protrudes into the space of the gas chamber formed by the pressure reducing valve body and the diaphragm. A burner characterized by being attached to.