JP2019020103A - Ignition device - Google Patents

Abstract

To provide an ignition device that is safe enough to prevent an ignition operator from being injured by a burn and saves energy by reducing usage of a fuel gas.SOLUTION: An ignition device includes: a body including a cylindrical part and a grip part connected to the cylindrical part; an ignition plug embedded in a tip of the cylindrical part and continuously generating spark; a high-voltage generating part attached to the body and including a power supply and a booster; and a high-voltage cable extending through the high-voltage generating part and the cylindrical part to connect the booster to the ignition plug.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ignition device for igniting a device used for a billet refining operation, and more particularly to an ignition device that improves safety and realizes energy saving.

  In the steel piece refining work, the steel piece is melted or cut using a scarfing blow tube or a portable cutting machine (large fusing device). When igniting these large-scale fusing devices, the oxygen-free gas is blown out in advance and ignited using an off-the-shelf spark lighter or lock lighter (spark (heat source) generator). Gas and oxygen are artificially mixed.

  As a spark (heat source) generating device, a gun-type hand-held lighter is generally used that generates a spark with a flint by simply pulling a trigger and ignites a gas mixed with oxygen. What is disclosed by patent document 1 is known.

Seiko Seisakusho Co., Ltd. Lock lighter (SHOEI) Part No. 004 http://ms-seiko.co.jp/ct-421.html

  When igniting a conventional large-sized fusing device, there is a considerable time difference between opening the fuel gas valve and igniting by the igniter. For this reason, fuel gas continues to be injected before ignition, and air bubbles within the explosion limit in air (propane: 2.1% to 9.5%) are formed. Large flames may occur. As a result, there is a possibility that the ignition worker may be burned, and thus there is room for improvement in the safety of the above apparatus.

  In addition, since the fuel gas continues to be injected from the time when the fuel gas valve is opened until ignition by the igniter, the fuel gas is lost. There is room for.

  The present invention has been made in view of the above circumstances, and provides an ignition device that is safe without causing burns to an ignition worker, and that achieves energy saving by reducing the amount of oxygen used. Objective.

The present inventors diligently studied an ignition device that can be used safely compared to the prior art and that can reduce the amount of oxygen to be used. As a result, the present inventors have heretofore known that both of the fact that the combustion range extends over a wide range at the time of ignition and that a considerable amount of oxygen is required for each ignition, a large amount of mixing containing oxygen. The knowledge that the ignition mode that generated the spark toward the gas was the cause was obtained. From such knowledge, the inventors pay attention to the change of the ignition mode, and further, if the mixed gas containing fuel gas and oxygen is generated toward the space where the spark is continuously generated in advance, the result Therefore, it is only necessary to use oxygen in an amount necessary for ignition, so that not only the amount of mixed gas at the time of ignition is reduced and safety is improved, but also the amount of oxygen itself can be reduced. For this reason, they have learned that energy can be saved. Based on the above findings, the present inventors have completed the present invention. The summary is as follows.
The present inventors have intensively studied an ignition device that can be used safely compared to the prior art and can reduce the amount of fuel gas to be used. As a result, conventionally, the fuel range at the time of ignition extends over a wide area, and a considerable amount of fuel gas is required for each ignition, both of a large amount of oxygen in the air and fuel gas. The knowledge that the ignition mode which generated the spark toward the mixed gas is the cause was obtained. From such knowledge, the present inventors pay attention to the change of the ignition mode, and further generate a mixed gas containing fuel gas and oxygen in the air toward a space where sparks are continuously generated in advance. As a result, only the minimum amount of fuel gas required for ignition is used, so that the amount of fuel gas used can be reduced, so that energy can be saved, and at the time of ignition. The knowledge that the safety of ignition work is improved because the combustion range is narrowed by reducing the amount of gas mixture. Based on the above findings, the present inventors have completed the present invention. The summary is as follows.

  [1] A main body including a cylindrical portion and a gripping portion connected to the cylindrical portion, a spark plug embedded at the tip of the cylindrical portion and continuously generating sparks, and attached to the main body, And a high-voltage generator including a booster, and a high-voltage cable extending in the high-voltage generator and the cylindrical portion and connecting the booster and the spark plug. machine.

  [2] The ignition device according to [1], wherein a pre-boost is provided between the power source and the booster.

   [3] In a state where sparks are continuously generated from the ignition device according to [1] or [2], fuel gas is ejected toward the sparks, and a mixed gas of the sparks and air in the air An ignition method characterized by contacting the two.

  In the ignition technique (apparatus and method) according to the present invention, the ignition mode is changed from that of the conventional technique, and a mixed gas containing fuel gas and air in the air is generated toward a space where sparks are continuously generated in advance. , Based on the technical idea. As a result, in the ignition technique according to the present invention, by narrowing the combustion range, it is possible to improve the safety of ignition work and realize energy saving.

FIG. 1 is a conceptual diagram illustrating an example of an ignition device according to the present embodiment. 2A and 2B are diagrams sequentially showing ignition modes, in which FIG. 2A shows a conventional ignition mode, and FIG. 2B shows an ignition mode of the present embodiment using the ignition device shown in FIG. FIG. 3 is a conceptual diagram showing a modification of the ignition device of the present embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. These embodiments do not limit the present invention. The constituent elements of the above embodiment include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, various forms included in the above-described embodiments can be arbitrarily combined within a range obvious to those skilled in the art.

<Basic form>
[Ignition equipment]
First, the ignition device of the present invention will be described.
FIG. 1 is a conceptual diagram illustrating an example of an ignition device according to the present embodiment. The ignition device 10 shown in FIG. 1 includes a main body 12, a spark plug 14, a high voltage generator 16, and a high voltage cable 18.

  As shown in FIG. 1, the main body 12 includes a cylindrical portion 12a and a gripping portion 12b that is continuous with the cylindrical portion 12a. The cylindrical part 12a can be made of aluminum, and its dimensions can be 10 mm or more and 30 mm or less. On the other hand, the grip 12b is made of an insulator such as plastic, and a trigger T is formed on the grip 12b.

The spark plug 14 is embedded at the tip of the cylindrical portion 12a and can be made of metal . The longitudinal dimension of the spark plug 14 in FIG. 1 can be 50 mm or more and 80 mm or less.

  The high voltage generating part 16 is formed so that the cylindrical part 12a of the main body 12 penetrates. The high voltage generator 16 includes a casing 16a made of an insulator such as plastic, and a power supply 16b and a booster 16c included in the casing 16a. The power supply 16b and the booster 16c are connected by a cable C1. Yes.

  Note that the type of power supply is not limited, and it is possible to use an external power supply via a wiring to the outside as well as a battery.

  The high-voltage cable 18 extends in the housing 16 a and the cylindrical portion 12 a and connects the booster 16 c and the spark plug 14. The current value flowing through the high-voltage cable 18 is 50 mA or more and mA or less, and the potential generated in the booster 16c is 15 kV or more and kV or less.

[Ignition method]
Next, the ignition method of the present invention (ignition method using the ignition device shown in FIG. 1) will be described.
First, the spark plug 14 shown in FIG. 1 is disposed in a space where a mixed gas (including fuel gas and oxygen in the air) is subsequently ejected, and a trigger T provided on the grip portion 12b is pulled, so that the spark plug 14 To generate sparks continuously.

  Here, the mechanism of the phenomenon in which sparks occur continuously is as follows. That is, the booster 16c connected to the power supply 16b via the cable C1 boosts the power supply voltage to a higher voltage, and this high voltage is applied between two electrodes (center electrode and ground electrode) (not shown) of the spark plug 14. Discharge phenomenon occurs. This discharge is a phenomenon caused by dielectric breakdown in an extremely short time of about 1/1000 second, and sparks are continuously generated when this phenomenon occurs continuously.

  Next, while maintaining the continuous generation of sparks due to such a discharge phenomenon, a mixed gas of fuel gas and oxygen in the air is ejected toward the sparks to bring the sparks into contact with the mixed gas.

  Here, the ignition mechanism is as follows. That is, first, fuel gas particles are activated by spark discharge between the two electrodes of the spark plug 14. Next, the activated fuel gas particles are oxidized by a chemical reaction. At this time, reaction heat is generated to form flame nuclei, and the flame nuclei sequentially activate the surrounding gas mixture to generate flames. The range, i.e., the combustion range, is expanded to reach ignition.

  Note that LPG and LNG can be used as the fuel gas, and the oxygen concentration in the mixed gas can be 21 vol% or more.

  The ignition mode according to this embodiment as described above is compared with the conventional ignition mode as follows. FIG. 2A shows a conventional ignition mode, and FIG. 2B shows the ignition mode of the present invention.

  In the conventional ignition mode shown in FIG. 2 (a), a mixed gas G composed of fuel gas and air is previously ejected from the gas nozzle 32 of the large fusing device, and a spark writer L is used to spark the mixed gas G. S1 is generated and ignition is executed.

  Here, since the lock lighter L is a device of a type that generates a spark S1 by rubbing the ignition stone with a rotary file, for example, the time during which the generated spark S1 exists in the air is extremely short. For this reason, when sufficient oxygen is not contained in the mixed gas G, that is, when the mixed gas G is not within the explosion range, ignition cannot be performed. Further, from the gas nozzle 32 of the large fusing device, the holding operation of the lock lighter L, the generation operation of the spark S1, and the generation operation of the spark S1 are performed several times, and the fuel gas is continuously injected until ignition is performed. At the time, the amount of the mixed gas G is considerably increased.

  When the spark S1 is generated in this state, when the oxygen diffused in the mixed gas G comes into contact with the spark S1 and ignition is performed, the existence region of the mixed gas G is extremely wide. As shown on the right side of the arrow a), the flame generation range F1 also covers a wide area. Therefore, when the flame generation range F1 is wide in this way, there is a possibility that the operator may be burned at the time of ignition, and the ignition operation may not be performed safely.

  In the example shown in FIG. 2A, if it takes time from the ignition operation of the lock lighter L to the ignition after opening the fuel gas valve, the fuel gas continues to be injected, and the fuel gas and oxygen in the air Mixing proceeds excessively. As a result, even a non-combustible gas is produced in a considerable amount, so that waste may occur from the viewpoint of environmental load associated with energy use.

  On the other hand, in the ignition mode of the present invention shown in FIG. 2B, the spark S2 is continuously generated using the ignition device 10 according to the above-described embodiment, and the fuel gas is supplied from the gas nozzle 32 of the large fusing device. Ignition is performed by jetting toward the spark S2.

  Here, since the ignition device 10 of this embodiment generates a spark S2 by continuously causing a discharge phenomenon between both electrodes of the spark plug 14, it is in the air while the trigger T is being pulled. The state in which the spark S2 is constantly generated is maintained. For this reason, the amount of fuel gas contained in the mixed gas is sufficient for ignition. Similarly to the example shown in FIG. 2 (a), the fuel gas is injected from the gas nozzle 32 of the large fusing device, but the amount of fuel gas is minimized during ignition. However, the amount is considerably smaller than that shown in FIG.

  When the mixed gas is generated in the region where the spark S2 has been generated in this way, when the mixed gas and the spark S2 come into contact with each other and the ignition is performed, the region where the mixed gas exists remains relatively narrow. Therefore, as shown on the right side of the arrow in FIG. 2B, the flame generation range F2 also reaches a relatively narrow range. Therefore, in the ignition mode of the present embodiment, since the flame generation range F2 remains in a narrow region at the time of ignition as described above, the operator can be safely ignited without being burned at the time of ignition.

  In the example shown in FIG. 2B, since the spark S2 is generated in advance before the mixed gas is ejected, the amount of fuel gas in the mixed gas at the time of ignition is the minimum necessary amount. For this reason, waste is not generated from the viewpoint of the environmental load accompanying energy use, and so-called energy saving can be realized.

  As described above, in the ignition method according to the present embodiment (FIG. 2 (b)), the ignition mode is changed from that in the conventional technique (FIG. 2 (a)), and the fuel is directed toward the space where sparks are continuously generated in advance. By generating a mixed gas containing gas and oxygen in the air, the safety of ignition work can be improved and energy saving can be realized.

<Preferred form>
Below, a suitable form is shown with respect to the basic form mentioned above.
FIG. 3 is a conceptual diagram showing a modification of the ignition device shown in FIG. The ignition device 20 shown in FIG. 3 is different from the ignition device 10 shown in FIG. 1 only in the configuration of the high voltage generator 16, and the other configurations are the same.

  In the example shown in FIG. 3, the high voltage generator 16 is formed so that the cylindrical portion 12a of the main body 12 penetrates, and a casing 16a made of an insulator such as plastic and a power source included in the casing 16a. 16b, a booster 16c, and a pre-boost 16d. The power source 16b and the pre-boost 16d are connected by a cable C2, and the pre-boost 16d and the booster 16c are connected by a cable C3.

  When the two boosters 16d and 16c are provided between the power supply and the high-voltage cable as described above, the power supply voltage is set to the first high voltage in the pre-boost 16d connected to the power supply 16b via the cable C2. In the booster 16c that has been boosted and connected to the pre-boost 16d via the cable C3, the first high voltage is boosted to a second high voltage that is higher than the first high voltage. A discharge phenomenon occurs when applied between two electrodes (a center electrode and a ground electrode) (not shown).

  In this way, by providing the two boosters 16d and 16c between the power supply and the high-voltage cable, even if the power supply voltage is lower than the minimum voltage required to be applied to the booster 16c, Since the power supply voltage can be boosted to the minimum voltage in advance by the booster 16d, the booster 16c can be used effectively.

  The ignition device shown in FIG. 3 also supplies fuel gas toward a space where sparks are continuously generated in advance, and generates a mixed gas containing fuel gas and oxygen in the air. Similarly, it is possible to increase the safety of ignition work and to realize energy saving.

  According to the present invention, safety can be enhanced and energy saving can be realized. Thus, the present invention is particularly useful in igniting devices used for billet refining operations.

DESCRIPTION OF SYMBOLS 10, 20 Ignition apparatus 12 Main body 12a Tubular part 12b Gripping part 14 Spark plug 16 High voltage generation part 16a Case 16b Power supply 16c Booster 16d Pre-boost 18 High pressure cable 32 Gas nozzle C1, C2, C3 cable F1 of a large fusing device , F2 Flame generation range G Mixed gas L Rock lighter S1, S2 Spark T Trigger

Claims (3)

A main body including a cylindrical portion and a gripping portion connected to the cylindrical portion;
A spark plug that is embedded at the tip of the cylindrical portion and continuously generates sparks;
A high voltage generator attached to the main body and including a power source and a booster;
A high-voltage cable extending in the high-voltage generator and in the cylindrical part and connecting the booster and the spark plug;
An ignition device comprising:   The ignition device according to claim 1, further comprising a pre-boost between the power source and the booster.   In a state where sparks are continuously generated from the ignition device according to claim 1 or 2, a mixed gas containing fuel gas and oxygen in the air is generated toward the sparks, and the sparks and the mixed gas are generated. Ignition method characterized by making it contact.

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