JP3670435B2 - Premixed combustion ignition rod - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a premixed combustion ignition rod that ejects a premixed combustion flame from the tip of a rod-like extension extending from the main body by an ignition operation of the main body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, ignition rods are commercially available and widely used as combustion equipment such as gas appliances that are not automatically ignited, or as an ignition tool for combustible materials such as liquid or solid fuel.
[0003]
This ignition rod has an extension portion extending from a main body portion having a gas tank for storing liquefied gas, and a gas flame is jetted from a jet nozzle provided at the tip of the extension portion (Japanese Patent Laid-Open No. Hei 8-110047). No.)
[0004]
Further, it is considered that the gas combustion flame of the ignition rod is a flame that is strong against wind and hardly disappears as a premixed combustion flame in which the primary air is mixed with the gas ejected from the ejection nozzle.
[0005]
[Problems to be solved by the invention]
Therefore, in the case of the premixed combustion ignition rod as described above, the flame may not be extinguished immediately during the fire extinguishing operation.
[0006]
Specifically, in order to achieve the premix combustion type, it is necessary to reduce the nozzle diameter of the ejection nozzle and increase the gas ejection speed. However, reducing the nozzle diameter of the ejection nozzle Great resistance to distribution.
[0007]
On the other hand, as described above, in the ignition rod, a valve mechanism for opening and closing the gas tank and the gas supply is installed in the main body portion held by hand, so that the flame emitting tip and the main body portion are separated from the valve mechanism. A gas pipe connecting the ejection nozzle at the tip is inevitably formed long.
[0008]
In a state where the operation member is returned to stop the combustion and extinguish the fire, and the supply of gas to the ejection nozzle is shut off by the valve mechanism, gas remains in the gas pipe between the valve mechanism and the ejection nozzle. Since the nozzle diameter of the ejection nozzle is small as described above, the residual gas is gradually ejected from the nozzle, and during that period, a small combustion flame is continued and the extinguishing is delayed.
[0009]
Therefore, in view of the above circumstances, the present invention is intended to provide a premixed combustion ignition rod that can obtain quick extinguishing even if the nozzle diameter is reduced to obtain a premixed combustion flame.
[0010]
[Means for Solving the Problems]
The premixed combustion ignition rod of the present invention that has solved the above problems includes a main body that houses a gas tank for storing liquefied gas, a piezoelectric unit for gas ignition disposed in the main body, and one end of the main body. Is attached in the middle of a supply passage that connects the gas tank and the combustion cylinder, and communicates or shuts off the gas supply. A valve mechanism; and an ignition lever disposed in a main body that controls opening and closing of the valve mechanism to operate the piezoelectric unit, and the combustion is performed only when the supply path to the gas tank side is closed in the valve mechanism. An open path for communicating the cylinder side with the atmosphere is provided.
[0011]
The valve mechanism includes a pipe-shaped valve that moves in an axial direction closed by a valve body disposed at one end and opened at the other end, and a notch portion provided on an outer periphery of the valve has the opening. It is preferable that the opening is closed by press-contacting the sealing member interposed in the passage when the gas supply is moved, and the opening is opened away from the sealing member when the gas cut-off movement is performed. .
[0012]
【The invention's effect】
In the premixed combustion ignition rod as described above, the gas supply path from the gas tank to the combustion cylinder at the tip of the extension is shut off by a valve mechanism, and has an open path that allows the supply path on the combustion cylinder side to communicate with the atmosphere during fire extinguishing. Therefore, since the gas supply is shut off by the operation of the valve mechanism from the combustion state in which the open path is closed and the gas is supplied, and the open path is opened, the gas remains from the valve mechanism to the combustion cylinder. The gas being discharged is released into the atmosphere at once from the open path, and the gas pressure of the ejection nozzle in the combustion cylinder is also rapidly reduced, so that the fire is extinguished quickly.
[0013]
Further, when the gas is supplied from the gas tank by the valve mechanism, the open passage is closed, so that a premixed combustion flame is generated in the combustion cylinder, and desired combustion can be performed.
[0014]
Further, the valve mechanism is provided with a notch on the outer periphery of the valve that moves to open and close the gas supply, and the notch is pressed against the seal member interposed in the open path when the gas is supplied to close the open path. On the other hand, when the gas is shut off, the mechanism is provided so as to open the open path away from the seal member, so that the excess gas can be discharged to the atmosphere accurately and linked to the fire extinguishing operation by the gas opening / closing operation to obtain a quick fire extinguishing action Can be configured easily.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an overall configuration of an example premixed combustion ignition rod, and FIG.
[0016]
The premixed combustion ignition rod 1 is composed of a main body 2 that is gripped by a hand and an extension 3 that extends from the main body 2 in a bar shape.
[0017]
The main body 2 is constituted by a cover member 5 having an outer shell portion divided and formed in two, and a gas tank 7 storing liquefied gas is installed inside the cover member 5. The gas tank 7 is provided with a valve mechanism 8 for opening and closing the supply of gas. In addition, an ignition lever 9 is provided inside the lower part of the cover member 5 so as to be slidable back and forth, and between the gas tank 7 and the rear portion of the ignition lever 9 in accordance with the backward operation of the ignition lever 9. A piezoelectric unit 10 for supplying a discharge voltage is installed. Further, the two are linked so that the valve mechanism 8 is opened to supply gas in accordance with the reverse operation of the ignition lever 9.
[0018]
Next, the extension portion 3 has a rod shape, and an outer portion thereof is constituted by a tip pipe 11 made of, for example, a metal cylinder. A jet nozzle 12 for jetting gas is burned at the tip portion of the tip pipe 11. The rear end portion of the front end pipe 11 is inserted and fixed to the front end portion of the cover member 5.
[0019]
A gas pipe 15 made of a plastic material having one end connected to the ejection nozzle 12 is disposed inside the tip pipe 11, the gas pipe 15 extends rearward, and the other end is a valve 22, which will be described later, of the valve mechanism 8. It is connected to the.
[0020]
The combustion cylinder 13 combusts the fuel gas ejected from the ejection nozzle 12. As a gas combustion system using the combustion cylinder 13, the nozzle diameter of the ejection nozzle 12 is reduced to increase the flow velocity, and the primary air. It is a premixed combustion type that is mixed by suction.
[0021]
The valve mechanism 8 shows a gas shut-off state in FIG. 2, and a gas supply state in FIG.
[0022]
In the valve mechanism 8, a pipe-like valve 22 is disposed in an axial direction in a valve body 20 having a valve seat portion 20a so as to be movable in the axial direction. The valve 22 is closed by a valve body 21 provided with one end of an internal passage, and is a gas supply port 22a having the other end opened. The valve 22 has a communication hole 22b that communicates the internal passage and the outer peripheral portion at an intermediate portion thereof, and becomes a part of a supply path to the combustion cylinder 13 side.
[0023]
Further, a valve pressing member 23 is screwed to the tip of the valve body 20, and the tip of the valve 22 projects through the center of the tip of the valve pressing member 23. An open passage 24 communicating with the atmosphere is formed between the inner periphery of the hole and the outer periphery of the valve 22. The valve 22 is urged in the seating direction by a valve spring 25.
[0024]
A supply passage 26 on the gas tank 7 side is connected to the valve seat portion 20a of the valve body 20. The gas pipe 15 is connected to the tip gas supply port 22 a of the valve 22 to supply gas to the ejection nozzle 12.
[0025]
Further, a seal member 28 by an O-ring is interposed in the middle of the open path 24, that is, at a position pressed by the valve spring 25 inside the distal end portion of the valve pressing member 23. A notch 22c is formed. When the valve 22 moves in the valve opening direction and the rear end portion of the notch 22c comes into pressure contact with the seal member 28, the open passage 24 is closed, and conversely, the valve 22 moves in the valve closing direction. In this case, the notch 22c is separated from the seal member 28 and opens the open path 24.
[0026]
The valve 22 is moved in the axial direction in conjunction with the operation of the ignition lever 9 by a lever (not shown), and in the protruding direction against the valve spring 25 as shown in FIG. When moved open, the valve body 21 is in a valve-opened state away from the valve seat portion 20a.
[0027]
3, the gas from the gas tank 7 passes through the valve seat 20a opened by the valve body 21 and passes through the communication hole 22b from the outer peripheral portion of the valve 22 as indicated by the arrow. The gas flows into the internal passage, is supplied to the gas pipe 15 from the gas supply port 22a at the tip, and is jetted and combusted from the jet nozzle 12 of the combustion cylinder 13. In this case, the valve 22 is moving in the valve opening direction while compressing the valve spring 25, so that the notch 22c is in the protruding direction beyond the seal member 28, and the large diameter portion of the valve 22 is the seal member. The gas is supplied only in the direction of the ejection nozzle 12.
[0028]
Next, the fire extinguishing action will be described. When the valve 22 is moved in the backward direction by the urging force of the valve spring 25 from the state shown in FIG. 3, the valve body at the rear end of the valve 22 is shown in FIG. The gas supply is shut off when 21 is seated on the valve seat 20a of the valve body 20 and closed. At the same time as or before the seating, the seal member 28 is positioned in the notch 22c of the valve 22, the open passage 24 is opened, and the outer peripheral space of the valve 22 is communicated with the atmosphere.
[0029]
As a result, as shown by arrows in FIG. 2, the residual gas in the gas pipe 15 communicating with the ejection nozzle 12 flows toward the valve 22 having a lower ventilation resistance than the nozzle diameter, and is communicated from the internal passage of the valve 22 to the communication hole. By being released to the atmosphere and released through the open passage 24 through 22b, the internal pressure of the gas pipe 15 is lowered at once, the gas pressure at the ejection nozzle 12 is also lowered, and the fire is extinguished immediately.
[0030]
Next, FIG. 4 and FIG. 5 show a valve mechanism in another embodiment, and the shape of a notch 22d on the outer periphery of the valve 22 is different from that in the first embodiment.
[0031]
That is, the notch portion 22 in this example is simply formed in a step shape, and the valve body 21 shown in FIG. 4 is closed, that is, the valve body 21 at the rear end portion of the valve 22 is seated on the valve seat portion 20a of the valve body 20 and closed. Thus, when the gas supply is cut off, simultaneously with or before the seating, the seal member 28 moves from the stepped notch 22c of the valve 22 to the tip side, and the open passage 24 is opened, and the outer periphery of the valve 22 is opened. The subspace communicates with the atmosphere. As a result, the residual gas in the gas pipe 15 flows toward the valve 22 having a lower ventilation resistance than the nozzle diameter, and is released from the internal passage of the valve 22 to the atmosphere through the communication hole 22b and then released to the atmosphere. 15 The internal pressure is reduced at once, the gas pressure at the ejection nozzle 12 is also reduced, and the fire is extinguished immediately.
[0032]
On the other hand, in the valve open state of FIG. 5, as shown by the arrows, the gas from the gas tank 7 flows from the outer peripheral portion of the valve 22 into the internal passage of the valve 22 through the communication hole 22b, as shown by the arrow in FIG. It is supplied to the gas pipe 15 from the gas supply port 22a at the tip. In this case, the stepped notch 22c is in the protruding direction beyond the seal member 28, the large diameter portion of the valve 22 is in contact with the seal member 28 and closes the open passage 24, and the gas is ejected. It is supplied only in the direction of the nozzle 12. Others are the same as the previous example.
[Brief description of the drawings]
FIG. 1 is a front view showing an overall configuration of a premixed combustion ignition rod according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the main part of the valve mechanism of FIG. FIG. 4 is a cross-sectional view of the main part of the valve mechanism showing another embodiment of the present invention. FIG. 5 is a cross-sectional view of the main part of the valve mechanism in the combustion state of FIG.
DESCRIPTION OF SYMBOLS 1 Premixed combustion ignition rod 2 Main body part 3 Extension part 5 Cover member 7 Gas tank 8 Valve mechanism 9 Ignition lever 10 Piezoelectric unit 11 Tip pipe 12 Injection nozzle 13 Combustion cylinder 15 Gas pipe 20 Valve main body 20a Valve seat part 21 Valve body 22 Valve 22c , 22d Notch 23 Valve pressing member 24 Open path 25 Valve spring 28 Seal member

Claims (2)

A main body for storing a gas tank for storing liquefied gas;
A piezoelectric unit for gas ignition disposed in the main body;
A rod-like extension having one end attached to the main body and a combustion cylinder for premix combustion at the other end;
Disposed in the middle of the supply path communicating with said combustion cylinder and said tank, and a valve mechanism having a valve for communicating or cutting off the supply of gas to move in the feed path,
An ignition lever disposed in a main body for controlling opening and closing of the valve mechanism and operating the piezoelectric unit;
With
Wherein the supply passage, the premix combustion torches to the combustion cylinder side only when the supply line was closed, characterized in that a open passage communicating with the atmosphere and the gas tank side by the movement of the valve.   The valve mechanism includes a pipe-shaped valve that moves in the axial direction closed by a valve body disposed at one end and opened at the other end, and a notch provided on the outer periphery of the pipe is provided in the open path. The said sealing member is press-contacted to the interposed sealing member at the time of a gas supply movement, and closes an open path, The said notch part leaves | separates from the said sealing member at the time of a gas interruption movement, and opens an open path. Premixed combustion ignition rod.

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