JPH0227978Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermal processing device that uses liquefied gas such as butane gas as a fuel gas, and particularly relates to a thermal processing device that uses liquefied gas and has a piezoelectric ignition means. .

[Conventional technology]

Conventionally, as shown in Japanese Patent Publication No. 55-46783, etc., thermal processing has been carried out in which a mixed gas of liquefied gas and air is guided to a combustion catalyst and combusted, and a piezoelectric ignition means is used as the ignition means. The device is generally known.

[Problem that the invention attempts to solve]

By the way, in the conventional thermal processing apparatus,
In order to facilitate ignition by piezoelectric ignition means, a fibrous ceramic carrier carrying catalyst components is used as a combustion catalyst, but the problem is that the combustion catalyst disappears in a short time due to the heat during combustion. There is.

Therefore, in order to solve this problem, it is necessary to use a catalyst component supported on a cylindrical carrier with sufficient wall thickness, but with this type of combustion catalyst, only the spark of the piezoelectric ignition means is used. In this case, since the catalyst does not reach the oxidation reaction temperature, it is necessary to ignite the mixed gas using a piezoelectric ignition means to cause flaming combustion, and to heat the combustion catalyst with the heat of the flame.

By the way, an iron tip member with a built-in combustion catalyst is placed on the tip side of a cylindrical flaming combustion tube, and a mixed gas is injected into the flaming combustion tube and ignited by a piezoelectric ignition means to create a flame. When burning, the gas in the flaming combustion cylinder (mixed gas and combustion exhaust gas)
The entire amount passes through the iron tip member and is discharged to the outside. Therefore, if the gas in the flaming combustion cylinder is not discharged smoothly, there is a problem in that the mixed gas becomes clogged in the flaming combustion cylinder, making it impossible to ignite the mixed gas.

In addition, even if the gas in the flaming combustion cylinder is smoothly discharged, if the amount of mixed gas increases and the flow velocity of the mixed gas at the spark plug position increases,
There is a problem in that it is not easy to ignite the mixed gas, and it is very difficult to ignite the mixture for the first time, especially in winter.

In addition, when heating the combustion catalyst with the heat of the flame, it is necessary to extinguish the flame after the combustion catalyst reaches the oxidation reaction temperature in order to improve thermal efficiency and prevent deterioration of the catalyst due to the flame, but the amount of mixed gas If there are many
There is a problem in that it is not easy to extinguish inflammation.

This idea was created in view of the current situation,
In addition to preventing gas clogging in the flaming combustion cylinder, piezoelectric ignition means can easily and reliably ignite even when there is a large amount of mixed gas, and once the combustion catalyst is heated to the oxidation reaction temperature, it can be ignited quickly. Another object of the present invention is to provide a thermal processing device using liquefied gas that can extinguish flames reliably and is easy to operate.

[Means for solving problems]

The present invention consists of a gas injection member that injects liquefied gas in a gas tank as fuel gas; and a gas injection member that is installed on the outlet side of the gas injection member and sucks air from an outside air intake port by the ejector action of the gas injected from the gas injection member. a cylindrical mixed gas generation member that generates a mixed gas; a nozzle member provided at the tip of the mixed gas generation member that injects the mixed gas into a cylindrical flaming combustion cylinder; and operation of an ignition button. a piezoelectric ignition means for igniting the mixed gas in the flaming combustion tube; an iron tip member disposed on the tip side of the flaming combustion tube and containing a combustion catalyst for flameless combustion of the mixed gas through an oxidation reaction; It is formed in at least one of the flaming combustion tube, the iron tip member, or between the flaming combustion tube and the iron tip member, and opens at least immediately before ignition to open the inside of the flaming combustion tube. A gas discharge mechanism that discharges a part of the gas directly to the outside without passing through the combustion catalyst; is movably provided on the outer surface of the mixed gas generation member, and immediately before ignition, the opening area of the outside air intake port is reduced to reduce the air shortage. In addition to producing a mixed gas of It is characterized by comprising: an air amount adjustment mechanism; and an interlocking mechanism that interlocks the air amount adjustment mechanism and the ignition button.

[Effect]

In the thermal processing device using liquefied gas according to the present invention, when the liquefied gas in the gas tank is injected as fuel gas from the gas injection member, air is sucked from the outside air intake port by the ejector action, and the liquefied gas in the gas tank is injected as fuel gas. A mixed gas is generated within the gas generating member.
This mixed gas is injected from the nozzle member into the cylindrical flaming combustion cylinder, and is ignited by operating the ignition button of the piezoelectric ignition means.

By the way, as mentioned above, if the gas in the flaming combustion cylinder is not discharged to the outside smoothly, the mixed gas may become clogged in the flaming combustion cylinder, and it may not be possible to ignite it even if you operate the ignition button. .

Therefore, in the present invention, a part of the gas in the flaming combustion cylinder is directly discharged to the outside without passing through the combustion catalyst, using a gas discharge mechanism that opens at least immediately before ignition. As a result, the gas in the flaming combustion cylinder is smoothly discharged, the gas is not clogged in the flaming combustion cylinder, and it is possible to prevent ignition failure due to gas clogging.

In this way, ignition failure due to gas clogging is avoided by the gas exhaust mechanism, but if the amount of mixed gas increases and the flow velocity of the mixed gas at the ignition plug position becomes faster, the gas exhaust mechanism may be temporarily turned off. Even if you operate it, it may not be possible to ignite it, and once it is ignited, even if you try to exhaust the entire amount of gas in the flaming combustion cylinder to the outside through the combustion catalyst, it may not be possible to extinguish the flame. There is.

Therefore, in the present invention, the air amount adjustment mechanism is used to reduce the opening area of the outside air intake port immediately before ignition to generate a mixed gas lacking in air. This mixed gas has a high gas mixture ratio, so it is easy to ignite, and since the flow rate is reduced by the amount of air inflow, it is possible to reliably ignite it with a single operation. Further, after flaming combustion, the opening area of the outside air intake port becomes zero or becomes extremely large, so the flaming combustion conditions are forcibly broken and the flame is surely extinguished. Furthermore, after the flame has been extinguished, the opening area of the outside air intake port is returned to its optimal size, and the mixed gas with the optimal mixture ratio for combustion is sent directly to the combustion catalyst, resulting in complete flameless combustion. All operations of the air amount adjustment mechanism are performed in conjunction with the ignition button, so there is no need to be conscious of it.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows an example of a thermal processing apparatus using liquefied gas for soldering, etc., and in the figure, reference numeral 1
2 is a flow control valve; 3 is an on-off valve; these are usually incorporated into the handle 4;

At the tip of the handle 4, as shown in FIG.
is installed with its tip protruding from the handle 4.

As shown in FIG. 1, a disk-shaped nozzle plate 6 having a nozzle hole in the center and a filter member 7 made of porous sintered alloy or the like are removably incorporated into the mixed gas generating member 5. It is. .

Further, at the outlet side position of the nozzle plate 6 of the mixed gas generation member 5, as shown in FIG. For example, four outside air intakes 8 are provided at equal intervals in the circumferential direction, and when the four outside air intakes 8 are fully opened, the optimum gas/air mixture ratio for combustion can be obtained. .

Further, at the tip of the mixed gas generating member 5,
As shown in FIG. 1, the base end of a connecting pipe 11 having a dish-shaped receiving member 9 and a crater member 10 attached to its tip is screwed, and the receiving member 9 has a flaming combustion chamber 12 inside. The base end of a cylindrical flaming combustion tube 13 in which a flaming cylinder is formed is inserted. This flaming combustion tube 1
3, an iron tip member 14 is arranged as shown in FIG.
It is supported by a support pipe 15 that covers the outside of the flaming combustion tube 13 and the like, and a nut member 16 that fixes this support pipe 15 to the handle 4.

As shown in FIGS. 1 and 2, the crater member 10 has a baffle plate portion 10 at the tip in the injection direction of the mixed gas.
It has a cylindrical shape with a closed end and a mixed gas injection port 1 consisting of a plurality of openings on its circumferential surface.
0b is formed, and on the outer circumferential surface of the crater member 10, a buffer diffusion member 10c made of a material such as a net having a large number of small openings is disposed. Therefore, the mixed gas supplied from the connecting pipe 11 is
The mixed gas injection port 10b collides with the baffle plate portion 10a.
The mixed gas branches into the same number as the number of mixed gases (in the case of FIGS. 1 and 2, it branches into two branches), exits from each mixed gas injection port 10b, and is buffered and diffused by the buffering and diffusing member 10c.
The fuel is supplied into the flaming combustion chamber 12. Then, the baffle plate portion 10a of this crater member 10
As shown in FIGS. 1 and 2, the tip of the spark plug 17 is opposed to the tip face with a predetermined distance maintained between the tip and the tip of the spark plug 17 by operating a piezoelectric ignition element 18, which will be described later. Electric discharge is generated between the baffle plate portion 10a and the distal end surface of the baffle plate portion 10a, and the mixed gas in the flaming combustion chamber 12 is ignited.

On the other hand, the flaming combustion chamber 13 is formed in a cylindrical shape from a heat-resistant transparent or translucent material such as mica ceramics.
2 and the iron tip member 14 described later.
The state of flameless combustion within the flaming combustion tube 13 can be checked from the outside of the flaming combustion tube 13.

As shown in FIG. 1, a plurality of gas exhaust ports 101 are provided on the peripheral wall at the distal end of the flaming combustion tube 13. It is designed to be opened and closed by a cylindrical shutter 102 mounted so as to be slidable in both directions. Like the flaming combustion tube 13, the shutter 102 is made of a heat-resistant transparent or semi-transparent material, and has a radially protruding portion on the outer periphery of its axially proximal end, as shown in FIG. pin 1
For example, two shutters 03 are screwed together, and the shutter 102
A spring 104 is interposed between and the receiving member 9 to constantly press and bias the shutter 102 toward the iron tip member 14 side. And under normal conditions,
The gas outlet 101 of the flaming combustion tube 13 is the shutter 1
02, the entire amount of gas (mixed gas and combustion exhaust gas) in the flaming combustion tube 13 is transferred to the tip member 1.
4 and actuates the shutter 102 against the biasing force of the spring 104 to open the gas outlet 101 of the flaming combustion tube 13, a part of the gas in the flaming combustion tube 13 becomes gas. Outlet 101
The iron tip member 14 is directly discharged from the iron tip member 14.
The amount of gas introduced into the

As shown in FIGS. 1 and 3, the tip member 14 includes a tip body 19 having a cylindrical base end and a flange portion 19a at the base end, and a tip body 19 having a flange portion 19a at the base end. The built-in combustion catalyst 20 and the iron tip body 19 are used to prevent the combustion catalyst 20 from coming off.
An exhaust port 22 is provided on the tip side of the combustion catalyst 20 of the tip body 19 for discharging combustion exhaust after flameless combustion in the combustion catalyst 20. is provided.

As shown in FIGS. 1 and 4, the exhaust port 22 is formed by bending a part of the peripheral wall of the tip body 19 inward into a V-shape by pressing or the like to form a bent portion 23. This bent part 23
This prevents the combustion catalyst 20 from moving toward the tip side, and allows the combustion exhaust from the combustion catalyst 20 to be discharged from the exhaust port 22 after being appropriately buffered. This eliminates problems such as burns caused by the combustion exhaust forcefully discharged from the exhaust port 22.

The combustion catalyst 20 uses a ceramic carrier having a shape in which a plurality of through holes 20a and U-grooves 20b are formed inside and on the circumferential surface of a cylindrical material, respectively, as shown in FIGS. 1 and 3. It is constructed by supporting a catalyst component containing platinum and rhodium on its surface, and the through holes 20a and U grooves 20b form a straight gas flow path in the axial direction in the combustion catalyst, thereby perpetuating flameless combustion. It is now possible to do so.

The support pipe 15 is formed into a cylindrical shape from a corrosion-resistant metal material as shown in FIG.
An inner flange portion 15a that is locked to the nut member 16 is provided at the base end, and a flange portion 15b that is locked to the inside of the nut member 16 is provided at the base end. Further, on the peripheral surface of the support pipe 15, as shown in FIG.
5 is provided, and the pin 101 protrudes to the outside through this exhaust port 25.

On the other hand, the piezoelectric ignition element 18 is incorporated into the handle 4 as shown in FIG. , the terminal on the (-) side is connected to the crater member 10 via the guide member 27, the mixed gas generating member 5, and the connecting pipe 11 arranged between the mixed gas generating member 5 and the piezoelectric ignition element 18. ing. In addition, the piezoelectric ignition element 18
The ignition button 28 projects outward from the handle 4 as shown in FIG. 1, and is constantly pressed outward by the urging force of a spring 29. By pressing the ignition button 28 against the biasing force of the spring 29, electric discharge occurs between the tip of the spark plug 17 and the tip surface of the baffle plate portion 10a as described above, and the ignition button 2
Air amount adjustment member 30 that also serves as a flame extinguishing member and linked to
is activated to adjust the amount of air flowing in from the outside air intake port 8.

That is, the air amount adjusting member 30 is formed into a short cylindrical shape as shown in FIGS. 1, 5, 6, and 7.
is attached to the outer peripheral portion of the mixed gas generating member 5 so as to be slidable in the axial direction. The air amount adjusting member 30 is connected to the ignition button 28 via a connecting member 31, as shown in FIG.

This connecting member 31 is shown in FIGS. 1, 5, and 6.
7 and 8, it is formed into a band shape of, for example, stainless steel having a certain degree of rigidity and flexibility, and its tip is fixed to the air amount adjusting member 30, and The base end is fixed to the ignition button 28 after being curved within the handle 4, as shown in FIG. Also, this connecting member 3
1 is placed in a guide groove 32 provided in the handle 4, with the lower surface side supported by the mixed gas generation member 5 and the guide member 27, as shown in FIGS. 1 and 8. As the ignition button 28 is operated, the bending position gradually changes, and the air amount adjusting member 30 is activated.

That is, when the ignition button 28 is pressed against the biasing force of the spring 29, the curved position of the connecting member 31 shown in FIG. The amount adjusting member 30 is adapted to slide to the left in FIG. Also, press the ignition button 28 with the spring 2.
When the connecting member 3 is returned to its original state by the urging force of 9, the connecting member 3
1 is such that its curved position gradually moves toward the distal end while the entire portion is retracted toward the proximal end, thereby causing the air amount adjusting member 30 to slide to the right in FIG.

Next, the operation of this embodiment will be explained.

When the ignition button 28 is not pressed, the first
As shown in FIG. 5, the air amount adjusting member 30
is removed from the outside air intake port 8, and the outside air intake port 8 is in a fully open state.

When the on-off valve 3 is opened in this state, fuel gas at the flow rate set by the flow rate control valve 2 is discharged from the gas tank 1, mixed with air flowing in from the outside air intake port 8 in the mixed gas generation member 5, and combusted. This results in a mixed gas with an optimal mixing ratio. This mixed gas is transferred to the mixed gas injection port 1 of the crater member 10 via the connecting pipe 11.
The fuel is injected from 0b into the flaming combustion chamber 12 via the buffer diffusion member 10c.

Therefore, the ignition button 28 is pressed against the biasing force of the spring 29 to cause discharge between the tip of the spark plug 17 and the tip surface of the baffle plate portion 10a.

By the way, for reasons such as making the tip member 14 smaller, the gas in the flaming combustion tube 13 is
If the mixed gas is not smoothly discharged from the exhaust port 22 through the combustion catalyst 20 of No. 4, there is a problem that the mixed gas becomes clogged in the flaming combustion tube 13 and cannot be ignited.

Therefore, in this case, the tip of the pin 103 protruding outside the support pipe 15 is held and the shutter 102 is
1 to the right in FIG. 1 against the biasing force of the spring 104. As a result, the gas outlet 101 of the flaming combustion tube 13 is opened, and a portion of the gas in the flaming combustion tube 13 is directly discharged to the outside from the gas outlet 101. For this reason, the flaming combustion tube 13
The gas in the tank can be discharged smoothly, eliminating ignition failures caused by gas blockages.

By the way, even if the gas in the flaming combustion tube 13 is smoothly discharged, if the flow rate of the mixed gas discharged from the nozzle member 10 is high as described above, the mixed gas may not be able to be ignited.

Therefore, in this case, the air amount adjusting member 30 linked to the ignition button 28 is operated to bring the mixed gas into a state where it is easy to ignite, and then ignite it.

That is, when the ignition button 28 is operated to perform the ignition operation, the air amount adjusting member 30 first changes from the state shown in FIG. 5 (the outside air intake port 8 is fully open) to the state shown in FIG. 7 (the outside air intake port 8 is fully open). After passing through the fully closed state, the state shown in FIG. 6 is reached, and ignition is performed in this state. In the state shown in Figure 6, all four outside air intakes 8 are closed by 1/3 to 1/4, and the total opening area of the outside air intakes 8 is 67 to 75, assuming that when fully open is 100%. %
Therefore, the amount of air inflow decreases and the crater member 1
The flow rate of the mixed gas injected from zero becomes slow, and the mixed gas becomes air-deficient, in other words, the gas mixture ratio is high and it is easy to ignite. In addition, the discharge occurs at the tip side of the baffle plate portion 10a, and since this is the location where the flow velocity of the mixed gas is further reduced, ignition can be ensured even in the harshest of winters.

The ignited mixed gas undergoes flaming combustion within the flaming combustion chamber 12, and the combustion catalyst 20 reaches the oxidation reaction temperature in 1 to 2 seconds after ignition due to the heat of the flame.

Therefore, the pressing force on the ignition button 28 and the pin 10
3 is released, and the ignition button 37 and the shutter 102 are returned to the state shown in FIG. 1 by the urging force of the springs 38 and 104.

When the shutter 102 returns to the state shown in FIG. 20 to the outside from the exhaust port 22. Therefore, if the gas in the flaming combustion tube 13 cannot be exhausted smoothly, simply closing the gas exhaust port 101 will eliminate the flame in most cases. The entire amount of the mixed gas is directly sent to the combustion catalyst 20 for complete flameless combustion.
However, if the flow rate of the mixed gas discharged from the nozzle member 10 is high, the flame may not be extinguished simply by closing the gas outlet 101.

Therefore, in this embodiment, an air amount adjusting member 30 linked to the ignition button 28 is used to extinguish the flame.

That is, when the pressing force of the ignition button 28 is released,
The air amount adjusting member 30 changes from the state shown in FIG. 6 to the state shown in FIG. 7, and then returns to the state shown in FIG. 5. In the state shown in FIG. 7, all four outside air intake ports 8 are completely closed, so that gas containing no air is injected from the crater member 10, and the air inside the flaming combustion chamber 12 is Since all the air is used up in flaming combustion, there is no air necessary for combustion. Therefore, it becomes possible to extinguish the flame within the flaming combustion chamber 12 in an instant. After the flame is extinguished, the air amount adjusting member 30 returns to the state shown in FIG. 5, so that the mixed gas at the optimum mixture ratio for combustion is directly sent to the combustion catalyst 20, resulting in complete flameless combustion.

In addition, extinguishing the flame by the air amount adjusting member 30 is performed by shutting the gas outlet 101 of the flaming combustion tube 13 into the shutter 102.
This can be done reliably even if the gas outlet 101 is left open, as well as when the gas outlet 101 is closed. Therefore, at least as far as ignition and flame extinguishing are concerned, the shutter 102 is not necessary and the gas outlet 101 may be kept open at all times.

However, if the gas exhaust port 101 is always open, when the mixed gas is sent directly to the combustion catalyst 20 for flameless combustion, a portion of the mixed gas will flow through the gas exhaust port 1.
01 directly to the outside, and the combustion catalyst 2
The amount of mixed gas sent to the iron tip member 14 decreases, and as a result, the temperature of the iron tip member 14 decreases. Therefore, if it is desired to increase the temperature of the iron tip member 14, it is preferable to provide the shutter 102.

Therefore, the gas discharge port 101 is inserted into the flaming combustion tube 13.
In addition, since the opening area of the outside air intake port 8 is adjusted by the air amount adjusting member 30, even if the gas in the flaming combustion tube 13 is not discharged smoothly, the position of the spark plug 17 can be adjusted. Even when the flow rate of the mixed gas is high, ignition and flame extinguishment can be reliably achieved in one operation.
Moreover, since the air amount adjusting member 30, which performs complicated operations, is linked to the ignition button 28, there is no need to be particularly conscious of its operation, and it is easy to handle.

FIG. 9 shows a second embodiment of the present invention, in which an iron tip member 34 is used in place of the iron tip member 14 in the first embodiment.

That is, as shown in FIG. 9, the tip member 34 has a cylindrical tip body 39 having a flange portion 39a at the base end and a hot air outlet 39b at the tip for discharging combustion exhaust as hot air. In this tip body 39, as in the first embodiment,
A combustion catalyst 20 is incorporated, and a retaining member 21 is fixed to the base end of the tip body 39.

Note that other points are completely the same as the first embodiment.

Therefore, by using this iron tip member 34, it is possible to perform soldering, welding and melting of synthetic resin, covering with synthetic resin film, drying, heating, etc. using the hot air discharged from the hot air discharge port 39b. can.

10 to 12 show a third embodiment of the present invention, in which an air amount adjusting member 40 is used in place of the air amount adjusting member 30 in the first embodiment.

That is, the air amount adjusting member 40 is
As shown in the figures through FIG. 12, it is formed into a short cylindrical shape with a protruding piece 40a at one location in the circumferential direction of the base end surface. In the normal state, this air amount adjusting member 40 is designed to fully open the four outside air intake ports 8 as shown in FIG. 10, and at the time of ignition, as shown in FIG. 11. One of the four outside air intake ports 8 is fully closed and three are fully opened, and furthermore, during the return from the state shown in FIG. 11 to the state shown in FIG.
As shown in the figure, all four outside air intake ports 8 are completely closed.

Note that other points are completely the same as the first embodiment.

Therefore, even if this air amount adjusting member 40 is used, the same effects as in the first embodiment can be expected.

13 and 14 show a fourth embodiment of the present invention, in which an air amount adjusting member 50 is used in place of the air amount adjusting member 30 in the first embodiment.

That is, the air amount adjusting member 50 is
As shown in the figure, there are four openings 5 at equal intervals on the circumference.
The air amount adjusting member 50 is installed between a pair of guide rings 51 protruding from the outer peripheral surface of the mixed gas generating member 5 so that it can rotate only in the circumferential direction. It's summery.

On the other hand, at the tip of the connecting member 31, a long hole 52 is provided in an oblique direction as shown in FIG. The reciprocating movement of the connecting member 31 in the axial direction is converted into rotational movement of the air amount adjusting member 50 in the circumferential direction. And in normal times, the first
As shown in Figure 3, four outside air intake ports 8 are connected to the opening 50.
When the flame is ignited, the opening 50a is shifted in the circumferential direction and all four outside air intake ports 8 are closed by 1/3 to 1/4, and when the flame is extinguished,
All four outside air intake ports 8 are completely closed except for the opening 50a.

Note that other points are completely the same as the first embodiment.

Therefore, even if this air amount adjusting member 50 is used, the same effects as in the first embodiment can be expected.

15 to 17 show a fifth embodiment of the present invention, in which outside air intake ports 68a and 68b are used in place of the outside air intake port 8 in the first embodiment.

That is, both the outside air intake ports 68a and 68b are opened on the outer circumferential surface of the mixed gas generation member 5 while maintaining an axial interval wider than the width dimension of the air amount adjusting member 30, as shown in FIGS. 15 to 17. As shown in FIG. 15, the outside air intake port 68b is normally fully closed by the air amount adjustment member 30, and the outside air intake port 68a is closed by the air amount adjustment member 30 during ignition, as shown in FIG. It is now completely closed. Further, the opening area of the outside air intake port 68a is set so that a mixed gas with the optimum mixture ratio for combustion can be obtained by the outside air intake port 68a alone, and the opening area of the outside air intake port 68b is set so that the mixture gas from the outside air intake port 68a can be obtained by itself. It is set to obtain an air inflow amount of 67 to 75% of the air inflow amount.

In other respects, the configuration is the same as that of the first embodiment.

In the above configuration, at the time of ignition, only the outside air intake port 68b is opened as shown in FIG. 16, and the mixed gas generation member 5 generates a mixed gas lacking air. . Therefore, as in the case of the first embodiment, the ignition can be easily and reliably ignited.

When returning to the normal state after flaming combustion, the air amount adjusting member 30 changes to the 15th state after passing through the state shown in FIG.
The state shown in the figure will be reached.

By the way, in the state shown in FIG. 17, both the outside air intake ports 68a and 68b are fully open, so the mixed gas generating member 5 generates a mixed gas of excess air with an extremely high air mixing ratio. Ru.
As a result, the flaming combustion conditions are broken and the flame goes out.

Even with this configuration, the same effects as in the first embodiment can be expected.

FIG. 18 shows a sixth embodiment of the present invention.
Instead of the gas exhaust port 101, shutter 102, etc. in the first and second embodiments, a gas exhaust port that is always open is provided at the part of the proximal end of the tip body 19, 39 to which the retaining member 21 is fixed. 201
It was designed to provide a.

In other respects, the configuration is the same as that of the first embodiment or the second embodiment.

However, the main reason why the gas inside the flaming combustion tube 13 is not discharged smoothly is that the combustion catalyst 2
This is because the gas is clogged at the 0 part, so in this embodiment where the gas outlet 201 is provided on the upstream side of the combustion catalyst 20, the same method as in the first and second embodiments is used. You can expect good results. Therefore, in this sense, the gas exhaust port 201
A similar effect can be expected by providing a flange portion of the retaining member 21 between the flaming combustion tube 13 and the tip members 19 and 39, for example.

[Effect of idea]

As explained above, the present invention uses a gas exhaust mechanism that opens at least immediately before ignition to directly exhaust a portion of the gas in the flaming combustion cylinder to the outside without passing through the combustion catalyst. Ignition failure due to clogging can be prevented.

In addition, the air volume adjustment mechanism reduces the opening area of the outside air intake port immediately before ignition to generate air-deficient mixed gas, and after flaming combustion, the opening area of the outside air intake port is reduced to zero or extremely The opening area of the outside air intake port is returned to the optimum size after the flame is extinguished, so even when the amount of mixed gas is large, the piezoelectric ignition means can easily and reliably ignite and extinguish the flame. It is easy to operate.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the first embodiment of the present invention, FIG. 2 is a perspective view of the nozzle member and spark plug, and FIG.
The figure is an enlarged sectional view taken along the - line in Figure 1, and Figure 4 is an enlarged cross-sectional view of Figure 1.
Figures 5 to 7 are explanatory diagrams sequentially showing the operating states of the air amount adjusting member, Figure 8 is a sectional view taken along the line - of Figure 1, and Figure 9 is a cross-sectional view taken along the line - of the present invention. 10 to 12 are views corresponding to FIGS. 5 to 7 showing the third embodiment of the present invention, and FIG. 13 is a sectional view of the fourth embodiment of the present invention. Figure 14 is a diagram equivalent to Figure 13.
Figures 15 to 17 are plan views corresponding to Figures 5 to 7 showing the fifth embodiment of the present invention, and Figure 18 is the first diagram showing the sixth embodiment of the present invention.
Figure 9 is a diagram equivalent to Figure 9. 1...Gas tank, 4...Handle, 5...Mixed gas generation member, 6...Nozzle plate, 8, 68a, 68
b... Outside air intake, 10... Crater member, 13...
Flaming combustion tube, 14, 34...Tip member, 17...
...Spark plug, 18...Piezoelectric ignition element, 20...
Combustion catalyst, 27... Guide member, 28... Ignition button, 29... Spring, 30, 40, 50...
Air amount adjustment member, 31... Connection member, 32... Guide groove, 40a... Protrusion piece, 50a... Opening, 52
...Long hole, 53,103...Pin, 101,20
1... Gas discharge port, 102... Shutter, 104
……spring.

Claims (1)

[Claims for Utility Model Registration] 1. A gas injection member that injects liquefied gas in a gas tank as fuel gas; and a gas injection member that is provided on the outlet side of the gas injection member and that uses the ejector action of the gas injected from the gas injection member to vent the outside air. a cylindrical mixed gas generation member that sucks air from an inlet to generate a mixed gas; a crater member that is provided at the tip of the mixed gas generation member and injects the mixed gas into a cylindrical flaming combustion cylinder; ; piezoelectric ignition means for igniting the mixed gas in the flaming combustion cylinder by operating an ignition button;
a tip member disposed on the tip side of the flaming combustion tube and containing a combustion catalyst for flameless combustion of a mixed gas through an oxidation reaction; the flaming combustion tube, the iron tip member, or the flaming combustion tube; A gas discharge device that is formed at least in one place between the tip member and the tip member, opens at least immediately before ignition, and discharges a portion of the gas in the flaming combustion cylinder directly to the outside without passing through the combustion catalyst. Mechanism: movably provided on the outer surface of the mixed gas generation member, which reduces the opening area of the outside air intake immediately before ignition to generate a mixed gas lacking in air, and after flaming combustion, reduces the opening area of the outside air intake. an air volume adjustment mechanism that reduces the opening area to zero or extremely increases the flame to extinguish the flame, and further returns the opening area of the outside air intake port to an optimal size after the flame extinguishes; the air volume adjustment mechanism and the ignition button; A thermal processing device using liquefied gas, comprising: an interlocking mechanism for interlocking; 2. The gas exhaust mechanism is characterized by comprising a gas exhaust port provided on the peripheral surface of the tip of the flaming combustion tube, and a shutter provided on the outer periphery of the flaming combustion tube for opening and closing the gas exhaust port. A thermal processing device using liquefied gas according to claim 1 of the utility model registration claim. 3. Utility model registration claim 1 or 2, characterized in that the air amount adjustment mechanism includes an adjustment member that moves the outer surface of the mixed gas generation member to adjust the opening area of the outside air intake port. A thermal processing device using the liquefied gas described above. 4. The interlocking mechanism has a band-shaped connecting member whose base end is fixed to the ignition button, whose tip is pulled out to the outer surface of the mixed gas generating member, and whose tip operates in the axial direction of the mixed gas generating member when the ignition button is operated. A thermal processing apparatus using liquefied gas as set forth in claim 1, 2, or 3 of the utility model registration claim.