JPH0590156U - Wind resistant gas combustion device - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure the ignition of the air-fuel mixture by sparks such as discharge sparks. [Structure] A catalyst support ring (8) located above a cylindrical body (6) surrounding a combustion space of an air-fuel mixture, and a taper surface (8t) continuous with the inner peripheral surface of the cylindrical body (6). And [Effect] Since the turbulent flow does not occur in the mixed air flow from the inside of the tubular body (6) to the inside of the catalyst support ring (8), the ignition is ensured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a combustion device using a catalyst for sustaining combustion of gas fuel, and particularly, but not exclusively, to a wind resistant gas lighter for igniting a cigarette, which is disclosed in Japanese Utility Model Publication No. 3-45017. Regarding the improvement of.

[0002]

[Prior Art]

 In the gas writer disclosed in Japanese Utility Model Publication No. 3-45017, a gas mixing tube (5) having an intake port and a fuel gas receiving port is provided in a space between a hollow insulator cylinder (3) and a catalyst wire (7) above the hollow insulator cylinder (3). ), A mixture of fuel gas and air is supplied, and this mixture is ignited by an ignition means.In a wind-resistant gas combustor, the wind-resistant gas between the insulator cylinder (3) and the catalyst wire (7) above In order to facilitate maintenance and ensure reliable ignition, the cylinder structure that encloses the combustion maintaining space is supported by the inner flange of the lower end of the support cylinder (2) supporting the outer flange of the upper end of the insulator cylinder (3). Secure the support tube (2) to the insulator tube (3) by screwing the fixing ring (6) into the tube (2) and tightening the outer flange from above, and attach the catalyst support ring (6) to the upper end of the fixing ring (6). 8) and place this ring (8) on the support tube (2) by screwing the retaining ring (9) downwards. It is fixed to the support tube Te. One of the pair of electrodes of the high voltage generator including the piezoelectric element and the striking mechanism is connected to the support arm (1) supporting the support tube (2) and the fixing ring (6) via the support tube (2). The other electrode is connected via a gas mixing pipe (5) to a gas mixture nozzle (4) having a tip projecting into the inner space of the fixing ring (6). The support tube (2) is fixed to the support arm (1) by caulking. When the high voltage generator generates a high voltage, an electric spark is generated between the inner surface of the fixed ring (6) and the tip of the mixture nozzle (4), and the mixture in the ring (6) is ignited. The flame rises across the catalyst through the openings in the catalyst support ring (8). The flame emitted from the support ring (8) to the outside air may be extinguished by the wind, but since the catalyst maintains the combustion of the air-fuel mixture in the vicinity of the flame, when the wind subsides, the flame again opens in the catalyst support ring (8). Appear outside.

[0003]

[Problems to be solved by the device]

 If the electric spark energy of the high-voltage generator is sufficiently large and the shape and processing accuracy of the electrode member that generates the spark are high, the electric spark will ignite the air-fuel mixture in the inner space of the inner ring (6). However, if the high-voltage generator is a small one with relatively little energy generated, or if the shape and processing accuracy of the electrode members are rough, the probability of failing to ignite the mixture increases. .

The present invention aims to reduce the probability of ignition failure.

[0005]

[Means for Solving the Problems]

 The wind-resistant gas combustion device of the present invention uses a gas mixing pipe (5) having an intake port and a fuel gas receiving port in the space between the hollow insulator cylinder (3) and the catalyst wire (7) above it for fuel gas combustion. In a wind-resistant gas combustion device in which a mixture of air and air is supplied and the mixture is ignited by an ignition means, a tubular support member having a tubular part with a screw and a hole opened vertically at the bottom of the tubular part (1 ); Hollow insulator cylinder (3) whose upper end is inserted into the lower opening of the hole of the cylinder support member (1); Lower end surface abuts the upper surface of the peripheral edge of the upper opening of the cylinder support member (1) A tubular body (6); a catalyst wire (7) is held in the central opening, and a ring-shaped lower end surface abutting the upper end surface of the tubular body (6), and a ring-shaped tee continuous with the lower end surface and the inner peripheral surface. -A catalyst support ring (8) having a surface or a ring-shaped curved surface; and an inner flange that abuts the upper end surface of the catalyst support ring (8), with a thread for the cylindrical support member (1) Screwed into Jo unit, retaining ring threaded (9); characterized in that it comprises a.

That is, in the above-mentioned conventional example, the catalyst supporting ring (8) projects inward from the inner peripheral surface of the tubular body (6), and the inner peripheral edge of the lower end surface of the catalyst supporting ring (8) is in the combustion chamber. It was found that the probability of ignition failure increases when the sparks that ignite the air-fuel mixture are unstable, because the air-fuel mixture that hits the surface and disturbs the air-fuel mixture and disturbs the air-fuel mixture. The inner peripheral edge of the lower end surface of the ring (8), that is, the continuous portion between the ring-shaped lower end surface of the catalyst support ring (8) and the inner peripheral surface is defined as a ring-shaped taper surface or a ring-shaped curved surface.

[0007]

[Action]

 According to this, the air-fuel mixture that flows upward from the inner space of the tubular body (6) through the inner space of the catalyst support ring (8) is smoothed at the connection portion between the tubular body (6) and the ring (8). Ignition can be ensured even if the flow of sparks of relatively low energy or the spark generation position varies.

Other objects and features of the present invention will be apparent from the following description of embodiments with reference to the drawings.

[0009]

【Example】

 FIG. 1 shows an exploded view of an embodiment of the present invention. A fuel nozzle 20 is attached to the fuel tank 17, and in this embodiment, by pulling up the fuel nozzle 20, the gas release valve opens in the fuel tank 17 and the fuel in the fuel tank 17 is removed. It becomes solid and comes out from the nozzle 20. The fuel tank 17 is made of translucent synthetic resin, and the remaining amount of liquefied fuel inside the fuel tank 17 can be visually observed from the outside of the tank. The fuel tank 17 is integrally formed with a side trunk 19 for guiding the high-pressure generator 24 and a trunk 18 for supporting the burnananite (2 etc.).

The high-voltage generator 24 is a so-called piezoelectric unit that has a piezoelectric element that generates a high voltage in response to impact and a mechanism that impacts this, and is a body case 24c of an insulator. A piezoelectric element is housed inside, and one end of this piezoelectric element is supported by a metal base 24f. A high voltage lead 24 is connected to the other end of the piezoelectric element. The tip of the high-voltage lead 24 is wound around a coil 24w having a predetermined radius by stripping off the insulating coating and exposing the conductive wire. An operating case 24i is mounted on the main body case 24c, and a coil spring and a plunger for impact are housed in the operating case 24i. On the outer surface of the head of the operation case 24i, a conductive layer having the same potential as the base 24f is exposed. When the actuating case 24i is pushed down, the coil spring is compressed, the plunger is released from the lock at a certain position, and the plunger is driven downward by the repulsive force of the spring to strike the piezoelectric element. At this time, the piezoelectric element generates a high voltage between the base 24f and the actuating case 24i (usually called an earth) and the coil 24w (usually called a high voltage pole).

At the time of assembling the writer, the receiving plate 22 and the rubber plate 23 are inserted into the hole 17r of the fuel tank 17. Next, the operator 21 is passed through the support 18 between the two legs 21f ₁ and 21f ₂ , the engaging groove 21r is inserted under the flange 20f of the nozzle 20, and the protrusion 21p ₂ for the fulcrum is supported. It is attached to the trunk 18 while being engaged with the groove 18r of 18. The leg sleeve 5s of the mixing tube 5 is passed through the coil 24w of the piezoelectric unit 24, and the orifice plate 10, the washer 11 and the filter 12 are inserted in this order into the leg sleeve 5s of the mixing tube 5, and the leg sleeve is inserted. -The internal female screw of the sleeve 5s is screwed into the male screw on the outer periphery of the side end of the flange pipe 13 and tightened. Pass through.

Next, the operating element 25 formed by pressing a metal plate is placed on the operating case 24i of the piezoelectric unit 24, and these are inserted between the trunk 18 and the side trunk 19 of the fuel tank 17. In this way, the semicircular projections 25f ₁ and 25f ₂ formed by pressing the operator 25 into contact with the legs 21f ₁ and 21f ₂ of the operator 21 from above. If the operator 25 is pushed down in this state, the actuating case 24i of the piezoelectric unit 24 is pushed down, and the operator 21 is centered on the protrusion 21p ₂ (supported by the groove 18r of the trunk 18). The nozzle 20 is pulled up by rotating clockwise (discharge of fuel gas from the nozzle 20).

Next, a gas mixing unit in which the insulator cylinder 3, the ignition nozzle 4, the mixing tube 5, the orifice plate 10 and the expandable synthetic resin tube 15 are integrated is installed in the tube 15 of the gas mixing unit. The nozzle 20 is connected to the nozzle 20 by covering the nozzle 20 with the lower end opening and fitting it to the flange 20f, and lowering the O-ring 16 close to the flange 20f of the nozzle 20. As a result, the O-ring 16 clamps the lower end of the stretchable synthetic resin tube 15 against the peripheral surface of the nozzle 20.

Next, the legs 1La and 1Lb of the tubular support member 1 to which the required components such as the catalyst 7 have already been assembled are placed on the outside of the trunk 18 and the operator of the fuel tank 17, and the pin 2 is attached to the legs. The cylinder support member 1 is coupled to the tank 17 through the holes 1h2 of 1La and 1Lb and the hole 18h2 of the tank 17.

As described above, when the operator 21, the cylinder support member 1, the operator 25, and the piezoelectric unit 24 are assembled to the fuel tank 17, these are attached to the writer case 26 and the lower opening 26b thereof. Then, the hole 18h of the trunk 18 is pushed out so as to come out above the upper opening 26h of the writer case 26. Then, the legs 28f ₁ and 28f ₂ fixed to the upper lid 28 are straddled over the trunk 18, and the holes 28h ₁ and 28h ₂ of the legs are attached to the holes 1h1 of the leg portions 1La and 1Lb of the tube support member 1 and the trunk 18. Aligning with the holes 18h, the pins 29 are passed through these holes, and the upper cap 28 of the upper lid 28 is pushed down toward the writer case 26. When the upper cap 28 exactly closes the upper opening 26 of the writer case 26, the ends of the legs 28f ₁ and 28f ₂ of the upper lid 28 projecting in a triangular shape are pressed out by the operator 25 in this state. It comes into contact with the upper end of the semicircular protrusion 25r ₁ formed by the ridge.

Next, the hook 30 is inserted into the lower opening 26b of the lighter case 26, and the projection 30p of the hook 30 is engaged with the inner groove 26 of the lighter case 26 to open the lower opening. 26b is closed with the lower lid 31, and the screw 32 is screwed into the screw hole on the lower bottom of the fuel tank through the hole 31h of the lower lid 31 and the hole 30h of the hook 30.

As described above, the writer is assembled. When using the writer thus assembled, the upper cap 28c of the upper lid 28 is rotated with the thumb in the timewise direction around the pin 29. Then, the legs 28f ₁ and 28f _{2 of} the upper lid 28 drive the operator 25 downward. The downward movement of the operating element 25 drives the operating case 24i of the piezoelectric unit 24 downward to compress the coil spring therein, and the operating element 21 rotates in the time direction to pull up the nozzle 20. As a result, the fuel gas is started to be discharged from the nozzle 20, and the discharged fuel gas is stretchable (elastic) synthetic resin tube 15, filter 12, central hole of washer 11 and orifice plate 10. Through the central orifice (10h: FIGS. 2 and 3) into the mixing tube 5 and proceed further upward. Due to this fuel gas flow, air is sucked into the mixing pipe 5 through the intake port (5h: Fig. 2, 3) opened on the peripheral surface of the mixing pipe 5, and this air is mixed with the fuel gas, and the mixed gas is mixed. From the tube 6 enters the inner space of the tube supporting member 1 through the opening 4h of the ignition nozzle, passes through the catalyst wire 7, and exits above the tube supporting member 1.

When the upper lid 28 is further rotated, the engagement of the plunger in the operation case 24i of the piezoelectric unit 24 is released, and the repulsive force of the coil spring causes the plunger to strike the piezoelectric element, resulting in high voltage. The coil 24w of the lead 24h joins the ignition nozzle (4: FIGS. 2 and 3) in the support cylinder 2 through the mixing tube 5, while the conductive case of the actuating case 24i of the piezoelectric unit 24 and the operator 25. Since the cylinder support member 1 is connected to the low pressure (ground) electrode of the piezoelectric unit 24 via the, the discharge occurs between the ignition nozzle (4) and the circular edge of the inner flange of the cylinder support member 1. Sparks occur. The discharge spark ignites the mixed gas in the tube support member 1 to generate a flame, and the flame heats the catalyst wire 7 to red heat, thereby promoting combustion of the mixed gas.

In this state, when the tip of the cigarette is brought close to above the catalyst wire 7, it is ignited.

FIG. 2 shows an enlarged internal structure of the tube support member 1, and FIG. 3 shows a cross section taken along line III-III thereof. It should be noted that these drawings show a state immediately before the elastic synthetic resin tube 15 is connected to the nozzle 20.

The structure around the cylinder support member 1 will be described with reference to FIGS. 2 and 3. In the metal (conductive) cylinder support member 1, the outer flange of the insulator cylinder 3 enters the bottom. The opening has an inner flange against which the upper end surface of the entered outer flange abuts, and the upper part has a cylindrical portion having a cylindrical wall with an internal thread 1s cut on the inner peripheral surface, and further integrated with this cylindrical portion. The leg portions 1La and 1Lb are continuous and extend in a direction orthogonal to the central axis CRL of the tubular portion and extend downward in parallel with the central axis CRL. The leg portions 1La and 1Lb are provided with a hole 1h2 through which a pin 2 connecting the leg portions 1La and 1Lb passes and a hole 1h1 through which a pin 29 serving as a rotation axis of the upper lid 28 passes (FIG. 1). The tubular portion of the tubular support member 1 only covers the insulator tube 3. A ceramic cylindrical body 6 that defines the distance between the catalyst supporting ring 8 and the tip of the ignition nozzle 4 is inserted into the cylindrical portion of the cylindrical supporting member 1. I'm riding.

Since the catalyst support ring 8 is thicker than the ceramic tubular body 6, it projects inside the tubular body 6. Therefore, the edge where the lower end surface and the inner peripheral surface of the catalyst support ring 8 intersect is shaved off to form a ring-shaped taper surface 8t. The thickness (radial width) of the ring-shaped lower end surface of the ring 8 connected to the lower end of the taper surface 8t is substantially the same as the thickness of the ceramic cylindrical body 6, and the inner peripheral surface of the ceramic cylindrical body 6 is tapered. -The surface 8t is substantially continuous. As a result, of the air-fuel mixture that has entered into the tubular body 6 from below, those that rise along the inner wall surface of the tubular body 6 are smoothed along the inner wall surface of the tubular body 6 and then along the taper surface 8t. Inwardly and then rises along the inner surface of the ring 8. Since the turbulent flow of the air-fuel mixture does not occur at the contact portion between the upper end portion of the ceramic cylindrical body 6 and the lower end portion of the catalyst support ring 8, the probability of ignition even with unstable sparks is high and the ignition is improved.

The taper surface 8t may be an arm having a relatively large radius value. That is, it may be a ring-shaped curved surface. This also smooths the air-fuel mixture flow and improves the ignition probability. However, it is preferable to use the taper surface because it takes a lot of time and labor to process an arc having a large radius value.

The holding ring 9 having a hexagonal hole 9h corresponding to the outer shape of a hexagonal nut at the upper end has a male screw on the lower outer peripheral surface, and this male screw is screwed onto the female screw 1s on the inner peripheral surface of the tube supporting member 1. ing. By inserting and turning a hexagonal screwdriver into the hexagonal hole 9h, the pressing ring 9 is screwed into the tube supporting member 1, and the catalyst supporting ring 8 is fastened by the pressing ring 9 and the ceramic tube 6.

A metal (electrically conductive) ignition nozzle 4 is inserted into the center hole of the inner flange of the ceramic cylinder 3 on which the cylinder support member 1 is mounted. The tip of the (conductive) mixing tube 5 is inserted, and the internal thread formed on the inner peripheral surface of the mixing tube 5 is screwed into the internal thread formed on the outer peripheral surface of the lower leg of the nozzle 4 to mix with the ignition nozzle 4. The tube 5 is fixed, and both are fixed to the ceramic tube 3 by tightening the inner flange of the ceramic tube 3 between them.

The coil 24w at the tip of the high-voltage lead 24h of the piezoelectric unit 24 strips the insulation of the high-voltage lead 24h, and the core wire (conductor) of the coil 24w is placed outside the leg sleeve 5s of the mixing tube 5. It is wound to a diameter slightly smaller than the diameter, and a leg sleeve 5s is inserted into this coil 24w and pressed by a gear-shaped flange 5f for screwing the mixing tube 5. As a result, the ignition nozzle 4 is electrically connected to the high voltage lead 24h of the piezoelectric unit 24 via the mixing tube 5 (note that even if there is a slight gap, when a high voltage is applied to the high pressure lead 24h). The gap is destroyed by discharge and becomes conductive). The tip portion of the ignition nozzle 4 is thinned into a small-diameter column shape, and the uppermost end thereof has a relatively sharp edge in a circular shape. Therefore, when the piezoelectric unit 24 generates a high voltage, a discharge spark is generated between the circumferential edge and the circumferential edge of the inner flange of the tube support member 1. An opening 4h is provided below the small diameter cylindrical portion at the tip of the ignition nozzle 4.

The mixing pipe 5 has an inner flange for receiving the orifice plate 10 at the center, and an intake port 5h for sucking air above the inner flange. A plate 10 having an orifice 10h, a washer 11 and a filter 12 are inserted in this order from the lower opening into the mixing pipe 5, and a flange pipe 13 is screwed into the lower opening of the mixing pipe 6 to form a plate 10, The washer 11 and the filter 12 are pressed against the inner flange of the mixing tube 6. A heat-resistant O-ring 14 is attached to the side peripheral surface of the flange pipe 13, and this maintains the airtightness of the threaded portion between the mixing pipe 5 and the flange pipe 13. The tip end of a stretchable synthetic resin tube 15 is press-fitted into the flange pipe 13 and is pressed against the inner wall of the flange pipe 13 by its extension force.

When the nozzle 20 is pulled up and fuel gas is discharged from the nozzle 20, it passes through the synthetic resin tube 15, and then through the filter 12, the central hole of the washer 11 and the orifice 10h of the plate 10. Into the mixing tube 5 and then into the ignition nozzle 4. Due to the flow of the fuel gas, air is sucked into the pipe 5 through the intake port 5h of the mixing pipe 5, and advances to the ignition nozzle 4 while being mixed with the fuel gas. The gas in which air and fuel gas are mixed, that is, the mixed gas, exits from the opening 4h of the ignition nozzle 4 into the inner space of the ceramic cylinder 3 and advances to the inner space of the ceramic cylinder 6. When the ignition spark occurs between the tip edge of the ignition nozzle 4 and the circumferential edge of the inner flange of the tube support member 1 when advancing from the inner space of the ceramic tube 3 to the inner space of the ceramic tube body 6, The mixed gas ignites and becomes a flame. The flame rises through the hexagonal opening 9h of the holding ring 9 through the catalyst wire 7, but the flame causes the catalyst wire 7 to become red heat, and the flame becomes pale blue due to the combustion promoting action of the catalyst wire 6. Or it becomes transparent. If you bring the tip of the cigarette closer to above the opening 9h, it will catch fire.

When the catalyst wire 7 is red hot, a strong wind that blows out the flame temporarily hits the opening 9h and the flame disappears, but when the wind passes, the flame regenerates at the catalyst wire 7 part. To do. Therefore, it has a wind resistance effect against a relatively strong wind.

When the upper lid 28 is closed, the nozzle 20 descends, the discharge of the fuel gas is stopped, and the combustion is stopped.

It is difficult to make a screw hole in the ceramic cylinder 3, and normally, a metal layer is formed on the surface by plating or vapor deposition, and the metal is welded to the metal layer to fix the ceramic cylinder 3 to the metal. In the embodiment, the cylinder supporting member 1 is placed on the ceramic cylinder 3 which is temporarily supported by the nozzle 20 of the fuel tank 17 through the tube 15 and further through the mixing pipe 5 and the ignition nozzle 4 to cover the cylinder supporting member 1. The lower ends of the legs 1La and 1Lb of No. 1 are fixed to the tank 17 with the pin 2, and at this time, the tube 15 is slightly compressed from above so that the upper end of the ceramic tube 3 is brought into contact with the inner flange of the tube support member 1. ing. Processing is easy because no plating or vapor deposition is required. Further, the pressing step of fixing the support cylinder to the support arm by caulking as in the conventional case is omitted. Further, similarly to the conventional example, when it is necessary to remove the catalyst wire such as cleaning around the catalyst wire 7 and around the ignition nozzle 4, the pressing ring 9 is rotated to remove it from the support cylinder 2, and the catalyst support ring 8 is pulled out. This makes it possible to easily and easily perform non-destructive disassembly, cleaning, and repair.

[0032]

[Effect of the device]

 As described above, according to the present invention, a taper surface (8t) or a curved surface is formed at the lower end of the catalyst support ring (8), and the catalyst support ring (8t) is formed from the inner peripheral surface of the tubular body (6). No turbulence is generated in the air-fuel mixture because the pendant of () is smooth on the inner peripheral surface. This reduces the probability of failing to ignite the mixture.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing the catalyst supporting cylindrical portion shown in FIG. 1 with a part thereof cut away.

3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

1: Cylinder Support Member (Cylinder Support Member) 2: Pin 3: Ceramic Cylinder (Insulator Cylinder) 4: Ignition Nozzle 5: Mixing Pipe 6: Ceramic Cylinder (Cylinder) 7: Catalyst Wire 8: Catalyst Support Ring 9: Presser Ring 10: Orifice plate 11: Washer 12: Filter 13: Flange pipe 14: O-ring 15: Synthetic resin tube 16: O-ring 17: Fuel tank 18: Trunk 19: Side trunk 20: Fuel nozzle 21: Operator 22: Receiving plate 23: Rubber plate 24: Piezoelectric unit 25: Manipulator 26: Writer
Case 27: Opening 28: Upper lid 29: Pin 30: Hanging hook 31: Lower lid 32: Screw

Claims (1)

[Scope of utility model registration request] 1. Mixing of fuel gas and air through a gas mixing pipe (5) having an intake port and a fuel gas receiving port in the space between the hollow insulator cylinder (3) and the catalyst wire (7) above it. In a wind-resistant gas combustion apparatus for supplying air and igniting this air-fuel mixture by ignition means, a tubular support member (1) having a tubular portion with a screw and a hole vertically opened at the bottom of the tubular portion (1); Hollow insulator cylinder (3) inserted into the lower opening of the hole of the support member (1); a cylinder body (6) whose lower end surface is in contact with the upper surface of the periphery of the upper opening of the hole of the cylinder support member (1) ;
A ring-shaped lower end surface holding the catalyst wire (7) in the central opening and abutting the upper end surface of the tubular body (6), and a ring-shaped taper surface or a ring-shaped curved surface continuous with the lower end surface and the inner peripheral surface. And a catalyst support ring (8) having: and a screw presser having an inner flange that abuts the upper end surface of the catalyst support ring (8) and screwed into the threaded tubular portion of the tubular support member (1). A wind resistant gas combustion device, characterized in that it comprises a ring (9).