JPH05312325A - Heat machining device with liquefied gas - Google Patents

Abstract

PURPOSE:To connect a piezoelectric ignition device with a part generating sparks without using any high voltage cable. CONSTITUTION:A main body case 1 and a combustion cylinder 11 are made of insulation material. A nozzle member 3, a mixture gas generating member 4, an electrical conductive pipe 7, a guiding cylinder 9, an injection part 10, a closing plate 12, a dispersion plate 15 and an ignition part 16 are made of electrical conductive material. An earth plate 17, a tongue piece 18, an iron tip 19, a cover 20 and a cap 21 are made of electrical conductive material. A lead line 30 at a (f) side of the piezoelectric ignition device 28 is inserted into the electrical conductive pipe 7. A lead line 31 at (-) side is arranged at a male threaded part 27 and connected to the cap 21. When an ignition button 29 is pressed, a spark is generated between the ignition part 16 and the tongue piece 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal processing apparatus using a liquefied gas such as butane gas, and more particularly to improvement of an ignition mechanism using piezoelectric ignition means.

[0002]

2. Description of the Related Art Conventionally, a thermal processing apparatus using a liquefied gas such as butane gas has been generally known, and automatic ignition using a piezoelectric ignition means is disclosed in, for example, Japanese Patent Publication No. 2-32532. Known to have been.

[0003]

By the way, in the conventional thermal processing apparatus having the piezoelectric ignition means, the piezoelectric ignition means is incorporated in the main body case, and the ignition plug is installed in the combustion cylinder. The (+) side terminal and the spark plug are connected to each other through a long high-voltage cable covered with an insulating coating.

Therefore, the structure becomes complicated and the cost becomes high, and when the device is disassembled for cleaning or the like,
Unreasonable force may be applied to the high-voltage cable, etc., and ignition by the piezoelectric ignition means may become impossible. Also, since it is necessary to secure a space for arranging high-voltage cables,
There is also a problem that there is a certain limit to miniaturization of the device.

The present invention has been made in view of the above situation, and a heat using a liquefied gas capable of reliably igniting with a simple structure and without causing a trouble by disassembling the apparatus, and capable of miniaturizing the apparatus. An object is to provide a processing device.

Another object of the present invention is to provide a thermal processing apparatus using a liquefied gas which can surely perform extinction after ignition with a simple structure.

Still another object of the present invention is to provide a thermal processing apparatus using a liquefied gas that can be surely ignited by one ignition operation even if the combustion cylinder is downsized.

[0008]

As a means for achieving the above object, the present invention is a conductive mixture for injecting gas and sucking external air by its ejector action to generate a mixed gas of gas and air. A gas generating mechanism; an insulative main body case for holding the mixed gas generating mechanism in a state where its tip portion is projected to the outside; and an insulating body case connected to the tip side of the gas mixture generating mechanism. A crater member having a combustion cylinder attached thereto, which burns the mixed gas in the combustion cylinder and has an ignition portion projecting from the tip; A cover; a conductive cap screwed to the tip of the main body case and fixed to the main body case by locking the base end of the cover; incorporated into the main body case; The lead wire on the (+) side passes through the mixed gas generation mechanism and the crater member. Piezoelectric ignition means connected to the ignition part, and a lead wire on the (-) side connected to an earth body located at the tip of the combustion cylinder via a cap and a cover. It is characterized in that it is provided.

Further, in the present invention, the lead wire on the (+) side of the piezoelectric ignition means is inserted into the conductive pipe provided at the base end of the mixed gas generating mechanism, whereby the mixed gas generating mechanism is provided. It is preferable to make a connection.

Further, the lead wire on the (-) side of the piezoelectric ignition means is arranged in the threaded portion of the main body case, and the cap is screwed into this threaded portion to be connected to the cap. It is preferable to do so.

Further, it is preferable that a shutter ring that slides by its own weight to open and close the outside air inlet is provided on the outer peripheral portion of the mixed gas generating mechanism.

Further, the ground body is connected to the tip of the combustion cylinder and the cover.
It is preferable to hold and fix it with the tip of the.

Further, it is more preferable that the crater member is provided with an injection portion and a diffusion plate, and the ignition portion is provided so as to project at the center of the tip of the diffusion plate.

[0014]

In the thermal processing apparatus using the liquefied gas according to the present invention, the mixed gas generating mechanism and the crater member constitute a conductor connected to the ignition part, and the cap and the cover.
Form a conductor connected to the ground body. Therefore, the lead wire on the (+) side of the piezoelectric ignition means is connected to the mixed gas generating mechanism, and the lead wire on the (-) side is connected to
By connecting to the cap, it is possible to generate a piezoelectric ignition spark between the ignition part and the ground body, which simplifies the structure, ensures the ignition, prevents the occurrence of defects due to disassembly of the device, and the device. Can be made smaller.

Further, in the present invention, the lead wire on the (+) side of the piezoelectric ignition means is inserted into the conductive pipe provided at the base end of the mixed gas generating mechanism, whereby the mixed gas generating mechanism is provided. Since the connection is made, the lead wire on the (+) side can be connected easily and securely.

Further, the lead wire on the (-) side of the piezoelectric ignition means is arranged in the threaded portion of the main body case, and the cap is screwed into the threaded portion, whereby the lead wire is connected to the cap. Therefore, it is possible to connect the lead wire on the (−) side without paying attention to the connection to the cap.

Further, since the shutter ring which opens and closes the outside air intake by sliding the outer peripheral portion of the mixed gas generating mechanism by its own weight is provided, the flame extinguishing after ignition is surely performed with a simple structure. Is possible.

Further, the ground body is provided with a combustion cylinder, a tip and a cover.
It is designed to be clamped between the tip of the
Even if the cover body is not fixed to the cover or the like in advance, it is possible to reliably connect the ground body and the cover.

Furthermore, since the injection part and the diffusion plate are provided in the crater member, and the ignition part is provided so as to project from the center of the tip surface of the diffusion plate, the volume in the combustion cylinder becomes smaller due to the downsizing of the device. However, it is possible to reliably ignite.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a thermal processing apparatus using a liquefied gas according to the present invention. In the figure, reference numeral 1 is an insulating main body case, and in the main body case 1, A liquefied gas storage tank, an on-off valve, and a flow rate control valve (none of which are shown) are incorporated, and the flow rate-controlled liquefied gas is guided to a conductive mixed gas generation mechanism 2 as shown in FIG. It is designed so that it can be played.

As shown in FIG. 1, the mixed gas generating mechanism 2 has a nozzle member 3 for injecting a liquefied gas whose flow rate is controlled.
And a tubular mixed gas generating member 4 connected to the tip of the nozzle member 3, the mixed gas generating member 4
Is designed to generate a mixed gas of gas and air by sucking the outside air from the outside air intake port 5 by the ejector action accompanying the gas injection from the nozzle member 3. Then, the generated mixed gas is guided to a conductive crater member 6 that is continuously provided at the tip of the mixed gas generating member 4, as shown in FIG.

As shown in FIG. 1, the mixed gas generating mechanism 2 has a main body case in which the base ends of the nozzle member 3 and the mixed gas generating member 4 are held in the main body case 1. 1, a conductive pipe 7 to be described later is attached to the outer surface of the nozzle member 3 located inside the body case 1, and the tip of the mixed gas generating member 4 located outside the body case 1. A shutter ring 8 that slides in the axial direction by its own weight to open and close the outside air intake 5 is attached to the outer peripheral portion of the. Then, by closing the outside air intake port 5 with the shutter ring 8, it is possible to extinguish the flame of the flammable combustion and shift to the flameless combustion. This will be described in detail later.

As shown in FIGS. 1 and 2, the crater member 6 has a guide tube portion 9 continuously provided at the tip end of the mixed gas generating member 4 and a tip end continuously provided at the tip end of the guide tube portion 9. And a combustion tube 11 made of insulating ceramics on the outer periphery of the injection section 10.
Is installed.

Between the guide tube portion 9 and the injection portion 10,
As shown in FIGS. 1 and 2, a flange-like closing plate 12
The closing plate 12 is mounted and positioned on the injection portion 10 of the combustion cylinder 11 when the combustion cylinder 11 is mounted on the injection portion 10.

In addition, the outer peripheral surface of the injection portion 10 is shown in FIG.
Further, as shown in FIG. 2, for example, two mixed gas injection ports 14 are provided at equal intervals in the circumferential direction, and the injection unit 1
At the tip of 0, a disc-shaped diffusion plate 15 having a diameter slightly smaller than the inner diameter of the combustion cylinder 11 is provided. Then, the mixed gas injected from each of the injection ports 14 into the combustion cylinder 11 passes through a narrow ring-shaped space between the inner peripheral surface of the combustion cylinder 11 and the outer peripheral surface of the diffusion plate 15, and the tip of the combustion cylinder 11. It is designed to be guided to the side.

As shown in FIGS. 1 and 2, a round rod-shaped igniting portion 16 is projectingly provided at the center of the front end surface of the diffusing plate 15, and the igniting portion 16 has an earth to be described later. The tongue pieces 18 of the plate 17 are arranged close to each other. The spark for ignition is generated between the ignition part 16 and the tongue piece 18. This will be described in detail later.

The ground plate 17 is, as shown in FIG.
It is formed in the shape of a ring plate, and a strip-shaped tongue piece 18, for example, is provided at one location on the inner edge thereof. The tongue piece 18 is arranged such that the ground plate 17 is disposed at the tip of the combustion tube 11 so that the combustion tube 11 is opened from the opening at the tip.
It is inserted inside, and the tip thereof is arranged to be close to the ignition part 16.

As shown in FIG. 1, a tip 19 is arranged on the tip side of the ground plate 17, and the tip 1
9 and the ground plate 17, the combustion cylinder 11, the crater member 6
And a cover 20 for covering the outer peripheral portion of the mixed gas generating member 4.
And a cap 21 for fixing the cover 20 to the main body case 1.

That is, as shown in FIG. 1, the tip 19 is formed in a cylindrical shape with a tip closed, having an exhaust port 22 on the tip peripheral surface and a flange portion 23 on the outer peripheral portion of the base end. A combustion catalyst 24 for burning the mixed gas in a flameless manner is incorporated inside the tip 19. The tip 19 is formed by iron-plating the surface of a copper base material, and has conductivity together with a cover 20 and a cap 21 described later.

As shown in FIG. 1, the cover 20 is formed of a conductive material such as stainless steel into a cylindrical shape. At the tip of the cover 20, the flange portion 23 of the tip 19 is provided. Inner flange-shaped locking portion 25 for locking
A cap 21 is provided on the base end of the cover 20.
An outer flange-shaped engaging portion 26 for engaging with is provided. Although not shown, on the peripheral surface of the cover 20, there are an opening for sending air to the outside air intake 5, an opening for confirming the color of the combustion cylinder 11 from the outside, an opening for heat dissipation, and the like. It is provided.

On the other hand, as shown in FIG. 1, the cap 21 is made of a conductive material such as an aluminum alloy in the shape of a nut.
It is adapted to be screwed and connected to a male screw portion 27 provided at the tip of the. At this time, a predetermined gap G is formed between the tip surface of the main body case 1 and the locking portion 26 of the cover 20, as shown in FIG. G
Thus, when the cap 21 is tightened, the cover 20 is pulled toward the base end side, so that the ground plate 17 and the tip 19 can be stably fixed.

As shown in FIG. 1, a piezoelectric ignition device 28 is installed in the main body case 1, and an ignition button 29 of the piezoelectric ignition device 28 penetrates the opening of the main body case 1. And it is protruding to the outside. By pressing the ignition button 29 against the spring pressure, the piezoelectric ignition operation is performed.

The lead wire 30 on the (+) side of the piezoelectric ignition device 28 is inserted into the conductive pipe 7 inside the main body case 1 as shown in FIG. On the other hand, the lead wire 31 on the (-) side of the piezoelectric ignition device 28 is attached to the outer surface of the male screw portion 27 through the hole provided in the main body case-1 and is attached to the male screw portion 27. By screwing the cap 21 to the portion 27, the cap 21 is connected to the cap 21. By operating the ignition button 29 to drive the piezoelectric ignition device 28, a spark is generated between the ignition part 16 and the tongue piece 18 of the ground plate 17.

That is, the lead wire 30 on the (+) side is provided with the conductive pipe 7, the nozzle member 3, the mixed gas generating member 4, the guide cylinder portion 9, the closing plate 12, the injection unit 10 and the diffusion plate 15 therebetween. The lead wire 31 on the (-) side is connected to the igniter 16 while being connected to the tongue piece 18 of the earth plate 17 via the cap 21, the cover 20 and the tip 19. There is. The (+) side and the (-) side are insulated by the main body case 1 having an insulating property and the combustion cylinder 11.
Therefore, when the piezoelectric ignition device 28 is driven, the ignition unit 1
A spark is generated between 6 and the tongue piece 18.

Next, the operation of this embodiment will be described.
When the liquefied gas is ejected from the nozzle member 3 into the mixed gas generating member 4, the ejector action accompanying the gas injection causes
Outside air is sucked into the mixed gas generation member 4 from the outside air intake 5, and a mixed gas of gas and air is generated in the mixed gas generation member 4.

The generated mixed gas is rectified in the guide cylinder portion 9 and then guided to the injection portion 10, where the mixed gas injection port 14 is provided.
Is injected into the combustion cylinder 11. Then, after that, it is guided to the tip end side of the combustion cylinder 11 through a ring-shaped space between the inner peripheral surface of the combustion cylinder 11 and the outer peripheral surface of the diffusion plate 15.

In this state, when the ignition button 29 is pressed and the piezoelectric ignition device 28 is driven, a spark is generated between the ignition part 16 and the tongue piece 18 of the ground plate 17, and the mixed gas is ignited. .. Then, the mixed gas burns with flame on the tip side of the diffusion plate 15 in the combustion cylinder 11, and the combustion catalyst 24 is heated to the oxidation reaction temperature by the flame.

By the way, the space surrounded by the injection part 10, the combustion cylinder 11, the closing plate 12 and the diffusion plate 15 is the injection part 10.
Since the space is wider than the inside, the flow velocity of the mixed gas injected from the mixed gas injection port 14 into this space is extremely reduced. The low-velocity mixed gas is further diffused by the diffusion plate 15, passes through the ring-shaped space between the inner peripheral surface of the combustion cylinder 11 and the outer peripheral surface of the diffusion plate 15, and is along the inner peripheral surface of the combustion cylinder 11. , To the tip side of the combustion cylinder 11. Therefore, the flow rate of the mixed gas further decreases. Moreover, the center of the tip surface of the diffusion plate 15 where the ignition part 16 is located is
Since it is the shaded portion of the diffusion plate 15, the flow velocity of the mixed gas is further reduced, and the mixed gas is retained. Therefore, even if the volume in the combustion cylinder 11 is small, it is possible to reliably ignite by one ignition operation.

When the combustion catalyst 24 is heated to the oxidation reaction temperature by the flame combustion by ignition, the main body case 1 is tilted so as to have a downward slope toward the tip 19. Then, the shutter ring 8 shown by the solid line in FIG. 1 slides along the outer surface of the mixed gas generating member 4 to the position of the chain line by its own weight. Then, the outside air intake port 5 has the shutter ring 8
Due to this, it will be temporarily closed. Therefore, the flame of the flame combustion is extinguished, the mixed gas is directly supplied to the combustion catalyst 24, and thereafter, the flame combustion by the combustion catalyst 24 is performed.

To stop the flameless combustion by the combustion catalyst 24, the supply of the liquefied gas to the nozzle member 3 is stopped.

Since the component parts of the device also serve as the conductor and the insulator for the piezoelectric ignition, the structure of the device is simplified and the device can be downsized. Further, even when the device is disassembled for cleaning or the like, there is no fear of disconnection or the like, and stable ignition operation can be secured for a long period of time.

In the above embodiment, the ground plate 1
Although the case where a spark is generated between the tongue piece 18 of 7 and the ignition part 16 has been described, for example, a projection piece is provided at the base end of the tip 19 and the projection piece is used as an earth body for ignition. You may make it generate | occur | produce a spark with the part 16. If the tip end of the ignition part 16 is sufficiently close to the base end part of the tip 19, the flange part 23 itself may be an earth body and the protrusion may be omitted.

Further, in the above-mentioned embodiment, the case where the lead wire 30 on the (+) side is inserted into the conductive pipe 7 has been described. However, a hole is directly formed in the mixed gas generating member 4, and this hole is inserted into this hole. It may be inserted or held between the outer surface of the mixed gas generating member 4 and the main body case 1.

[0044]

As described above, according to the present invention, the mixed gas generating mechanism and the crater member constitute a conductor for connecting the ignition portion and the lead wire on the (+) side, and the cap and the cover. Form a conductor that connects the ground body and the lead wire on the (-) side, and the body case and the combustion cylinder insulate the (+) side and the (-) side from each other. Since the insulating material is configured, a spark can be generated between the ignition portion and the ground body with a simple structure and reliably. Also,
Unlike the conventional one, since it is not necessary to use a high-voltage cable or the like, the device can be downsized, and even if the device is disassembled, there is no fear of disconnection or contact failure.

Then, in the present invention, the lead wire on the (+) side of the piezoelectric ignition means is inserted into the conductive pipe provided at the base end of the mixed gas generation mechanism, and thereby connected to the mixed gas generation mechanism. Since the mixed gas generating mechanism and the piezoelectric ignition means are separately assembled in the main body case, the lead wire on the (+) side and the conductive pipe can be finally connected. , Very easy to manufacture. Further, when disassembling and cleaning the mixed gas generation mechanism, only the mixed gas generation mechanism can be easily removed from the main body case, and reassembly is also easy.

Further, the lead wire on the side of the piezoelectric ignition means (-) is arranged in the threaded portion of the main body case, and the cap is screwed into this threaded portion so that the lead wire is connected to the cap. Therefore, the lead wire on the (-) side can be connected without being aware of connecting the lead wire on the (-) side to the cap.

Further, the mixed gas generating mechanism is provided with a shutter ring that slides the outer peripheral portion of the mechanism by its own weight to open and close the outside air inlet, so that the flame extinction after ignition is surely performed with a simple structure. You can

Further, the ground body is connected to the tip of the combustion cylinder and the cover.
It is designed to be clamped between the tip of the
Even if the cover body is not fixed in advance to the cover or the like, the ground body and the cover can be reliably connected.

Further, since the injection portion and the diffusion plate are provided in the crater member and the ignition portion is provided so as to project from the center of the tip surface of the diffusion plate, the volume in the combustion cylinder becomes small due to the small size of the device. Even in this case, the ignition can be reliably performed by one operation.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a thermal processing apparatus using a liquefied gas according to an embodiment of the present invention.

FIG. 2 is an exploded view showing an enlarged main part of FIG.

[Explanation of symbols]

 1 Body Case 2 Mixed Gas Generation Mechanism 3 Nozzle Member 4 Mixed Gas Generation Member 5 Outside Air Intake 6 Crater Member 7 Conductive Pipe 8 Shutter Ring 9 Guide Part 10 Injection Part 11 Combustion Cylinder 12 Closing Plate 14 Mixed Gas Injection Port 15 Diffusion Plate 16 Ignition part 17 Ground plate 18 Tongue piece 19 Tip 20 Cover 21 Cap 24 Combustion catalyst 27 Male screw part 28 Piezoelectric ignition device 29 Ignition button 30, 31 Lead wire

Claims (6)

[Claims] 1. A conductive mixed gas generating mechanism for injecting a gas and sucking external air by its ejector action to generate a mixed gas of the gas and the air; An insulative main body case that is held in a protruding state; and an insulative combustion cylinder connected to the tip side of the mixed gas generation mechanism and attached to the tip end, and the mixed gas is burned in the combustion tube. And a conductive cover covering the outer peripheral surfaces of the combustion cylinder, the crater member and the mixed gas generating mechanism; and a screw member attached to the tip of the main body case. , Lock the base end of the cover and
A conductive cap that is fixed to the case; is incorporated in the main body case, the (+) side lead wire is connected to the ignition part via the mixed gas generating mechanism and the crater member,
The lead wire on the (-) side passes through the cap and the cover,
A piezo ignition means connected to an earth member located at the tip of the combustion cylinder; and a thermal processing apparatus using liquefied gas. 2. The lead wire on the (+) side of the piezoelectric ignition means,
The thermal processing apparatus using liquefied gas according to claim 1, wherein the thermal processing apparatus is connected to the mixed gas generation mechanism by being inserted into a conductive pipe provided at the base end of the mixed gas generation mechanism. 3. The lead wire on the (-) side of the piezoelectric ignition means,
The thermal processing apparatus using liquefied gas according to claim 1 or 2, wherein the thermal processing apparatus is arranged in a threaded portion of the main body case and is connected to the cap by screwing the cap into the threaded portion. .. 4. The mixed gas generating mechanism is provided with a shutter ring that slides an outer peripheral portion by its own weight to open and close the outside air intake.
A thermal processing apparatus using the liquefied gas described. 5. The liquefied gas according to claim 1, wherein the ground body is clamped and fixed between the tip of the combustion cylinder and the tip of the cover. Thermal processing equipment. 6. The crater member includes an injection portion for injecting the mixed gas from the outer peripheral surface into the combustion cylinder; a tip end of the injection portion, which burns the mixed gas through a narrow space between the inner peripheral surface of the combustion cylinder. 6. A liquefied gas according to claim 1, 2, 3, 4, or 5, further comprising: a diffusion plate that is guided to the tip side of the cylinder, and the ignition portion is provided so as to project in the center of the tip surface of the diffusion plate. Thermal processing equipment used.