JP2016044886A - Bunsen burner device and bunsen burner main body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Bunsen burner device and a Bunsen burner main body capable of keeping a relative small-size, light weight and simple structure and capable of being transferred while an exhaust interference can be prevented in a superior manner.SOLUTION: This invention relates to a Bunsen burner device 100 comprising a fuel gas supply part 10 for supplying fuel gas F; and a combustion cylinder 80 forming a combustion flow passage S2 where the fuel gas F supplied from the fuel gas supply part 10 formed therein. At a downstream end of the combustion cylinder 80 in the flow direction of the fuel gas F, a combustion air introduction part 30 having a combustion air receiving inlet 31 for receiving combustion air A2 and a combustion air supply port 32 for supplying combustion air A2 is installed. A secondary combustion air supply pipe flowing combustion air A2 supplied from a combustion air supply source therein is installed at an outside part of the combustion cylinder 80 under a state in which it is connected to the combustion air receiving inlet 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a Bunsen burner device including a fuel gas supply unit that supplies fuel gas, and a combustion cylinder that internally forms a combustion channel for burning the fuel gas supplied from the fuel gas supply unit, and Bunsen Regarding the burner body.

Conventionally, as a bunsen burner using gas pressure used for preheating a metal ladle for melting a metal such as molten iron, a configuration for sucking primary combustion air or secondary combustion air from its surrounding atmosphere What to adopt is known. The gas pressure bunsen burner is usually in the form of injecting a combustion flame from above toward the inside of the above ladle for melting metal, in order to preheat a metal such as molten iron, The so-called exhaust, in which the combustion exhaust gas stays in its surrounding atmosphere, and the combustion exhaust gas is sucked again as primary combustion air or secondary combustion air, resulting in insufficient combustion oxygen and poor combustion. There was an interference problem.
Therefore, in order to avoid such a problem of exhaust interference, a fuel gas supply unit that supplies a fuel gas supplied from the outside and a combustion channel that burns the fuel gas supplied from the fuel gas supply unit are provided inside. A combustion cylinder formed in the cylinder, an outer cylinder that surrounds the combustion cylinder in a state where the cylinder axis is aligned with the combustion cylinder, and combustion air supplied from the outside is supplied between the combustion cylinder and the outer cylinder A gas pressure bunsen burner including a combustion air supply unit is known (see Patent Document 1).
That is, in the technique disclosed in Patent Document 1, combustion exhaust gas supplied between the combustion cylinder and the outer cylinder is guided from the outside (for example, outside of the atmosphere around the combustion cylinder), so that the combustion exhaust gas is used as combustion air. Is prevented and exhaust interference is suppressed.

Japanese Patent Laid-Open No. 2004-294043

  In the technique disclosed in Patent Document 1, a combustion air flow path through which combustion air supplied from a combustion air supply unit is formed is formed between the combustion cylinder and the outer cylinder. Therefore, it is necessary to make the combustion cylinder and the outer cylinder from a material with high thermal durability, and there is a problem that the weight of the Bunsen burner device itself increases when it is made from such a material. Furthermore, the Bunsen burner device itself has to be configured to be relatively large.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a Bunsen burner device capable of transporting while maintaining a relatively small, lightweight, and simple structure while being able to prevent exhaust interference well It is to provide the Bunsen burner body.

In order to achieve the above object, the Bunsen burner device of the present invention is
A Bunsen burner device comprising a fuel gas supply unit that supplies fuel gas, and a combustion cylinder that internally forms a combustion flow path for burning the fuel gas supplied from the fuel gas supply unit. Is
A first combustion air receiving port for receiving the first combustion air and a first combustion air supply port for supplying the first combustion air are provided at the downstream end of the combustion cylinder in the flow direction of the fuel gas. 1 with a combustion air inlet,
A state in which a first combustion air supply pipe through which a first combustion air supplied from a first combustion air supply source flows to the outside is connected to the first combustion air receiving port. It is in the point to prepare in.

According to the above characteristic configuration, since the first combustion air supplied to the burner is supplied from the first combustion air supply source, for example, the combustion exhaust gas in the atmosphere around the combustion cylinder is used for the first combustion. There is no risk of containing it as air, and exhaust interference can be avoided.
Furthermore, since the 1st combustion air supplied from the 1st combustion air supply source employ | adopts the structure supplied from the 1st combustion air supply piping arrange | positioned outside the combustion cylinder, There is no need to form an outer cylinder in addition to the combustion cylinder, and an outer cylinder made of a material that requires heat resistance and is relatively heavy is omitted, and a relatively light and relatively small Bunsen burner device is provided. realizable.
In addition, the first combustion air supply pipe is connected to the first combustion air inlet of the first combustion air introduction portion provided at the downstream end of the combustion cylinder in the flow direction of the fuel gas, Since it is provided outside and the first combustion air is supplied from the first combustion air supply port of the first combustion air introduction section, further processing for supplying the first combustion air to the combustion cylinder It is not necessary to make a burner, and the complication of the configuration as a burner can be avoided.
As described above, it is possible to realize a Bunsen burner apparatus that can transport while maintaining a relatively small, light, and simple structure while preventing exhaust interference satisfactorily.

Further features of the Bunsen burner device of the present invention are as follows:
The first combustion air introduction portion surrounds a cylinder outer peripheral wall at a downstream end of the combustion cylinder in the flow direction of the fuel gas, and is configured to directly follow the cylinder outer peripheral wall of the combustion cylinder. It is in the point which consists of a cyclic | annular member which forms the 1st combustion air flow path through which the working air flows.

There is a problem that the downstream end of the combustion cylinder in the flow direction of the fuel gas is overheated and easily damaged by being exposed to a combustion flame or combustion exhaust gas.
According to the above characteristic configuration, the tubular member as the first combustion air introduction portion surrounds the cylinder outer peripheral wall at the downstream end of the combustion cylinder in the flow direction of the fuel gas, and directly on the cylinder outer peripheral wall of the combustion cylinder. Since the first combustion air flow path through which the first combustion air flows is formed inside, the first combustion air having a relatively low temperature is brought into direct contact with the cylinder outer peripheral wall at the downstream end of the combustion cylinder. The cylinder outer peripheral wall of the combustion cylinder can be effectively cooled by flowing in the state.
On the other hand, since the first combustion air is preheated in a form in direct contact with the cylinder outer peripheral wall of the combustion cylinder and then mixed with the fuel gas, the combustion efficiency can be improved.

Further features of the Bunsen burner device of the present invention are as follows:
The annular member has a single first combustion air receiving port in the circumferential direction of the cylinder outer periphery of the combustion cylinder, and a plurality of the first members formed at equal intervals in the circumferential direction of the cylinder outer periphery of the combustion cylinder. 1 combustion air supply port.

According to the above characteristic configuration, after the tubular member receives the first combustion air from the single first combustion air receiving port formed in the circumferential direction of the cylinder outer periphery of the combustion cylinder, the first combustion air is After the combustion cylinder is cooled by flowing in the circumferential direction of the outer circumference of the combustion cylinder, the first combustion air heated (preheated) by the cooling is formed at equal intervals in the circumferential direction of the outer circumference of the combustion cylinder. From a plurality of first combustion air supply ports.
As a result, it is possible to improve the combustion efficiency by the well-preheated first combustion air while cooling the downstream end of the combustion cylinder well.

Further features of the Bunsen burner device of the present invention are as follows:
The combustion cylinder is provided with a second combustion air introduction branch pipe capable of introducing the second combustion air into the combustion cylinder,
A second combustion air supply pipe through which the second combustion air existing outside the ambient atmosphere of the combustion cylinder flows is provided so as to be connectable to the second combustion air introduction branch pipe. .

  According to the above characteristic configuration, the second combustion air supply pipe that allows the second combustion air existing outside the ambient atmosphere of the combustion cylinder to flow inside is connected to the second combustion air introduction branch pipe. Since the primary combustion air supplied to the inside of the combustion cylinder can be the second combustion air that does not contain the combustion exhaust gas, the exhaust interference can be further suppressed.

Further features of the Bunsen burner device of the present invention are as follows:
The second combustion air introduction branch pipe is provided in a state where its tube axis forms an angle larger than 0 degrees with respect to the cylinder axis of the combustion cylinder.

Normally, when the Bunsen burner device is used for preheating the inside of a ladle for melting metal, the combustion cylinder is disposed above the ladle for melting metal, and the cylinder axis of the combustion cylinder is used to melt the combustion flame. It is set in a state inclined obliquely from the vertical direction so as to be formed toward the inside of the ladle. In this case, the combustion exhaust gas that convects upward from the ladle for melting metal exists in the atmosphere around the combustion cylinder.
According to the above characteristic configuration, the second combustion air introduction branch pipe is provided in a state in which its tube axis forms an angle larger than 0 degrees with the cylinder axis of the combustion cylinder. The second combustion air supply pipe connected to the second combustion air supply branch pipe is provided by providing the pipe axis of the air introduction branch pipe in a state inclined by 90 degrees with respect to the cylinder axis of the combustion cylinder. (2) The intake port for combustion air can be provided vertically below the region where the combustion exhaust gas from the ladle for melting metal exists, and the combustion exhaust gas is also included in the second combustion air. Can be prevented.

  In the Bunsen burner device of the present invention, it is preferable that the first combustion air supply source is composed of a compressor capable of pressure-feeding the first combustion air to the first combustion air supply pipe.

To achieve the above object, the Bunsen burner body of the present invention is
A Bunsen burner main body comprising a fuel gas supply unit for supplying fuel gas, and a combustion cylinder for forming a combustion flow channel for burning the fuel gas supplied from the fuel gas supply unit. Is
A first combustion air receiving port for receiving the first combustion air and a first combustion air supply port for supplying the first combustion air are provided at the downstream end of the combustion cylinder in the flow direction of the fuel gas. 1 with a combustion air inlet,
The first combustion air supply inlet allows the first combustion air supplied from the first combustion air supply source to flow inside and is disposed outside the combustion cylinder. Is configured to be connectable.

According to the above characteristic configuration, the Bunsen burner main body is composed of the combustion cylinder and the first combustion air introduction part, and has a relatively small size, while exhibiting substantially the same operational effects as the Bunsen burner device described so far. Since it can maintain comparatively lightweight, it can be moved comparatively easily between a plurality of ladles for metal melting, for example.
And the 1st combustion air supply piping provided in the vicinity of the ladle for metal melting of a movement destination is connected to the 1st combustion air inlet provided in the 1st combustion air introduction part of the Bunsen burner body. In the form, the first combustion air can be supplied without causing exhaust interference.

(A) The schematic block diagram in the side view of the Bunsen burner apparatus of this invention, (b) The partial sectional view in the side view of the Bunsen burner apparatus of this invention Partial sectional view of the Bunsen burner device of the present invention as seen from the side Schematic configuration diagram of the Bunsen burner device according to the present invention in a fuel ejection direction The figure which shows the usage example which attached the Bunsen burner apparatus of this invention to the ladle for metal melting

  The Bunsen burner apparatus 100 according to the embodiment of the present invention relates to an apparatus that can transport with a relatively small, light, and simple structure while being able to satisfactorily prevent exhaust interference. Hereinafter, the Bunsen burner apparatus 100 will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the Bunsen burner apparatus 100 is a fuel gas supply unit 10 that supplies a fuel gas F such as city gas 13 </ b> A, and a combustion that burns the fuel gas F supplied from the fuel gas supply unit 10. And a cylinder outer peripheral wall 43 at the downstream end of the combustion cylinder 80 in the flow direction of the fuel gas F (in the reverse direction of the arrow X in FIGS. 1 and 2). 2), the secondary combustion air inlet 31 (an example of the first combustion air inlet) and the secondary combustion air A2 that receive the secondary combustion air A2 (an example of the first combustion air). An annular member 30 (an example of a first combustion air introduction part) having a secondary combustion air supply port 32 (an example of a first combustion air supply port) that supplies the fuel gas F toward the downstream side in the flow direction of the fuel gas F And a secondary combustion air A2 is pumped out of the combustion cylinder 80. Secondary combustion air supply pipe 20 (an example of the first combustion air supply pipe) through which the secondary combustion air A2 supplied from the presser (an example of the first combustion air supply source: not shown) flows. ) In a state of being connected to the secondary combustion air inlet 31.

The combustion cylinder 80 includes an upstream cylindrical member 50 provided on the upstream side in the flow direction of the fuel gas F (indicated by the arrow X in FIG. 2), and the downstream side in the flow direction of the fuel gas F (arrow in FIG. 2). And a downstream cylindrical member 40 provided on the opposite side of the arrow X.
The upstream tubular member 50 includes a closing lid 51 that closes the upstream end thereof, and can introduce primary combustion air A1 (an example of second combustion air) into the upstream tubular member 50. A primary combustion air introduction branch pipe 52 (an example of a second combustion air introduction branch pipe) is provided. As shown in FIGS. 2 and 4, one end of a primary combustion air supply pipe 53 (an example of a second combustion air supply pipe) is connected to the primary combustion air introduction branch pipe 52. The other end of the working air supply pipe 53 is provided outside the ambient atmosphere of the combustion cylinder 80, and does not include the combustion exhaust gas E outside the ambient atmosphere of the combustion cylinder 80 from the other end (or almost). (Not included) primary combustion air A1 can be taken in freely.
As shown in FIG. 2, the downstream side tubular member 40 is provided with a flame forming opening 44 at the downstream end thereof, and has a support portion 42 that externally supports the fuel gas supply unit 10 at the upstream end thereof. A plurality of primary combustion air flow holes 41 that allow the primary combustion air A1 to flow into the combustion flow path S2 formed inside the downstream cylindrical member 40 are provided.

As shown in FIGS. 1B and 2, the fuel gas supply unit 10 includes a fuel gas flow pipe 11 supplied from a fuel gas supply source (not shown), and the fuel gas flow pipe 11. A flow rate adjusting valve 17 that adjusts the flow rate of the flowing fuel gas F, a pressure gauge 16 that measures the pressure of the fuel gas F that has been adjusted by the flow rate adjusting valve 17, and a fuel gas F that is ejected at an increased flow rate. The fuel gas ejection nozzle 12 and the cylindrical member 15 surrounding the fuel gas F ejected on the downstream side of the fuel gas ejection nozzle 12 are configured.
Incidentally, the fuel gas flow pipe 11 of the fuel gas supply unit 10 is provided in a state of penetrating the closing lid 51 of the upstream cylindrical member, and the fuel gas ejection nozzle 12 is a support portion 42 of the downstream cylindrical member 40. And provided in a state of being disposed in the combustion flow path S2. As a result, the fuel gas F is injected from the fuel gas injection nozzle 12 toward the flame forming opening 44 of the downstream cylindrical member 40 along the cylinder axis L1 of the combustion cylinder 80.
As shown in FIG. 2, the cylindrical member 15 has a plurality of injection holes 13 formed in a cylindrical outer peripheral portion thereof, and a mixing cylinder portion 14 is extended downstream thereof.
Thereby, in the inside of the cylindrical member 15, the primary combustion air A1 outside the cylindrical member 15 is sucked by the ejector action accompanying the flow of the fuel gas F ejected from the fuel gas ejection nozzle 12, and the mixing cylinder portion 14, after mixing the fuel gas F and the primary combustion air A <b> 1 in the mixing flow path S <b> 1, the mixture M of the fuel gas F and the primary combustion air A <b> 1 becomes the combustion flow inside the combustion cylinder 80. It flows into the path S2.
Incidentally, the fuel gas flow pipe 11 is a metal pipe. However, in order to facilitate the movement of the Bunsen burner device 100, the fuel gas flow pipe 11 may be formed of a metal flexible pipe.

  As shown in FIGS. 2 and 3, a spark plug that ignites the air-fuel mixture M in the downstream cylindrical member 40 of the combustion cylinder 80 in the combustion flow path S <b> 2 formed inside the downstream cylindrical member 40. An ignition plug installation part 63 capable of installing an ignition plug installation electrode 62a (shown in FIGS. 2 and 3 only) and a frame rod installation part 60 capable of installing a flame rod 61 capable of detecting the formation of a flame are provided. Yes. Incidentally, the spark plug installation part 63 fixes the spark plug in a state where the spark plug installation electrode 62a is located in the combustion flow path S2, and the flame detection part 61a of the frame rod 61 is used for combustion in the frame rod installation part 60. The frame rod 61 is fixed while being positioned in the flow path S2.

The Bunsen burner device 100 supplies the secondary combustion air A2 at the downstream end of the downstream cylindrical member 40 in the flow direction of the fuel gas F (the direction indicated by the arrow X in FIGS. 1 and 2). It is configured.
That is, as shown in FIGS. 1 and 2, the secondary combustion air supply pipe 20 that flows through the secondary combustion air A2 that is pumped by a compressor (not shown), and the secondary combustion air supply pipe. A flow rate adjusting valve 23 capable of adjusting the flow rate of the secondary combustion air A2 flowing through 20, and a pressure gauge 22 for measuring the pressure of the secondary combustion air A2 after the flow rate is adjusted by the flow rate adjusting valve 23. And a venturi mixer 21 for taking outside air into the flow of the secondary combustion air A2 after the pressure is measured by the pressure gauge 22 in order to increase the flow rate of the secondary combustion air A2. An annular member 30 that receives the secondary combustion air A <b> 2 supplied from the industrial air supply pipe 20 is provided.
Incidentally, as shown in FIG. 1A, the secondary combustion air supply pipe 20 is connected to the secondary combustion air inlet 31 of the annular member 30 in order to facilitate the movement of the Bunsen burner device 100. A downstream straight pipe portion 20a, an upstream straight pipe portion 20c connected to the venturi mixer 21 on the upstream side of the downstream straight pipe portion 20a, a downstream straight pipe portion 20a, and an upstream straight pipe portion 20c. You may comprise from the flexible piping 20b connected flexibly, and all are metal.

As shown in FIGS. 1 and 2, the secondary combustion air supply pipe 20 is a secondary combustion of the annular member 30 provided in a state along the cylinder outer peripheral wall 43 at the downstream end of the downstream cylindrical member 40 of the combustion cylinder 80. It is connected to the commercial air inlet 31.
As shown in FIGS. 2 and 3, the annular member 30 is provided so as to surround the entire circumference of the cylinder outer peripheral wall 43 at the downstream end of the downstream cylindrical member 40 in the flow direction of the fuel gas F. Further, in the annular member 30, a secondary combustion air flow path S 3 (first combustion air) through which the secondary combustion air A 2 flows in a form directly along the cylinder outer peripheral wall 43 of the downstream cylindrical member 40. An example of a flow path is formed.
That is, in the present embodiment, the secondary combustion air flow path S3 has a substantially U-shaped annular member 30 and a downstream side in a cross-sectional view including the cylinder axis L1 of the combustion cylinder 80 (cross-sectional view shown in FIG. 2). It becomes an annular flow channel surrounded by the cylinder outer peripheral wall 43 of the side cylindrical member 40.
Further, to add a description, the annular member 30 is provided with a single secondary combustion air inlet 31 in the circumferential direction of the outer periphery of the downstream tubular member 40 as shown in FIGS. A plurality of secondary combustion air supply ports 32 formed at equal intervals in the circumferential direction of the outer circumference of the downstream cylindrical member 40 are arranged downstream in the flow direction of the fuel gas F (FIGS. 2 and 3). At the opposite side of the arrow X).
With this configuration, the secondary combustion air A2 pressure-fed from the secondary combustion air inlet 31 to the secondary combustion air flow path S3 inside the annular member 30 is the cylindrical outer peripheral wall 43 of the downstream side cylindrical member 40. In the state of being in direct contact with each other, while flowing along the entire outer circumference of the pipe of the downstream side tubular member 40, the secondary combustion air supply port 32 is sequentially supplied from the secondary combustion air supply port 32 provided at equal intervals along the circumferential direction of the outer circumference of the pipe. Is done.
Thereby, the downstream end of the downstream side tubular member 40 as the combustion cylinder 80 that is easily overheated by the combustion flame is appropriately cooled by the secondary combustion air A2, and the secondary combustion air A2 is preheated well. It will be supplied in the state that has been made.
The width L4 of the annular member 30 in the flow direction of the fuel gas F (the direction along the arrow X in FIGS. 1 and 2) is preferably 15% or more with respect to the total length L3 of the combustion cylinder 80. 15 If it is less than%, it is not preferable from the viewpoint of reducing the cooling effect of the downstream cylindrical member 40 as the combustion cylinder 80. However, it is not preferable to make L4 too long because the bunsen burner apparatus 100 is increased in weight, and in view of the weight of the entire bunsen burner apparatus 100, it should be in a portable range.

In the present embodiment, the flow rate ratio between the primary combustion air A1 and the secondary combustion air A2 can be preferably a flow rate ratio used in a general gas pressure-based Bunsen burner. It is preferable to set the primary combustion air A1 to about 30% and the secondary combustion air A2 to about 70%.
It should be noted that, under the condition that the radiant heat from the combustion flame is kept constant, the flow rate ratio is reduced when the fuel gas F, which uses propane with a relatively high calorific value as the main fuel, is used as the fuel gas F. Accordingly, the flow rate of the primary combustion air A1 sucked by the flow of the fuel gas F is reduced. As a result, the flow rate of the secondary combustion air A2 increases. On the other hand, in the case of using a fuel gas whose main fuel is methane having a relatively low calorific value, the flow rate of the primary combustion air A1 increases because the flow rate of the fuel gas increases. As a result, the flow rate of the secondary combustion air A2 decreases.

The Bunsen burner device 100 of this embodiment is configured to be movable (portable) between a plurality of ladles P for melting metal. FIG. 4 shows an installation state of the Bunsen burner device 100 in one ladle P for melting metal.
The Bunsen burner apparatus 100 is installed so that the inside of the metal melting ladle P can be preheated in such a form that the lower part thereof is supported by a support member 70 fixed to the metal melting ladle P, for example.
Here, the angle (angle indicated by β in FIG. 4) formed with the horizontal direction of the cylinder axis L1 of the combustion cylinder 80 of the Bunsen burner device 100 is set to 0 degree or more and 90 degrees or less.
Furthermore, the tube axis L2 of the primary combustion air introduction branch pipe 52 provided in the upstream cylindrical member 50 as the combustion cylinder 80, and the cylinder axis L1 of the upstream cylindrical member 50 as the combustion cylinder 80 Is preferably 90 degrees or less from the viewpoint of favorably guiding the primary combustion air A1 to the downstream side in the flow direction of the fuel gas F inside the combustion cylinder 80.
On the other hand, in terms of suppressing the amount of the combustion exhaust gas E taken in from the primary combustion air inlet 53a connected to the primary combustion air introduction branch pipe 52, the primary combustion air inlet is used. It is preferable that 53a be equal to or larger than an angle at which the opening is directed downward from the horizontal direction. Since the angle is determined based on the angle β with respect to the horizontal direction of the cylinder axis L1 of the combustion cylinder 80, the angle is preferably larger than the angle β.

[Another embodiment]
(1) In the above embodiment, the Bunsen burner device 100 of the present invention includes the secondary combustion air supply pipe 20 and its upstream configuration, the fuel gas flow pipe 11 and its upstream configuration, and primary combustion air. An example in which the supply pipe 53 is included and is configured to be portable is also shown.
However, according to the present invention, in the Bunsen burner apparatus 100, the secondary combustion air supply pipe 20 and the upstream configuration thereof, the fuel gas flow pipe 11 and the upstream configuration thereof, and the primary combustion air supply pipe 53 are provided. The Bunsen burner body not included is also included in the scope of rights.
That is, the secondary combustion air supply pipe 20 and its upstream configuration, the fuel gas flow pipe 11 and its upstream configuration, and only the Bunsen burner main body that does not include the primary combustion air supply pipe 53 are portable. To do.
Then, after moving to the vicinity of the metal melting ladle P, the secondary combustion air supply pipe 20 disposed in the vicinity of the metal melting ladle P is replaced with the secondary combustion air provided in the annular member 30. A fuel gas flow pipe 11 connected to the receiving port 31 and disposed in the vicinity of the ladle P for melting metal is connected to a burner via a connecting jig 18 (shown in FIG. 1) of the fuel gas flow pipe 11. You may comprise so that it may connect to the main body side piping and the primary combustion air supply piping 53 may be connected.

(2) In the above embodiment, the first combustion air introduction part is the annular member 30 that is an annular member that surrounds the cylinder outer peripheral wall 43 at the downstream end of the downstream cylindrical member 40 as the combustion cylinder 80. Although an example has been shown, it may not be a configuration that surrounds the entire cylinder outer periphery of the cylinder outer peripheral wall 43 at the downstream end of the downstream cylindrical member 40, or a part that surrounds a part of the cylinder outer peripheral wall 43. good. In other words, a configuration other than an annular shape may be used.
Further, the annular member 30 has a configuration in which the secondary combustion air flow path S <b> 3 formed therein is formed in a state where the primary combustion air A <b> 1 is in direct contact with the cylindrical outer peripheral surface of the downstream cylindrical member 40. Although an example is shown, a configuration that does not directly contact may be adopted.

(3) In the above embodiment, the example in which the annular member 30 is provided with the single secondary combustion air inlet 31 in the circumferential direction of the pipe outer periphery of the downstream cylindrical member 40 has been described. A configuration in which a plurality of secondary combustion air receiving ports 31 are provided may be employed. In this case, the plurality of secondary combustion air inlets 31 are preferably provided at equal intervals in the circumferential direction of the outer periphery of the downstream cylindrical member 40.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

  The Bunsen burner device and the Bunsen burner main body of the present invention can be effectively used as a Bunsen burner device and a Bunsen burner main body capable of transporting while maintaining a relatively small, light and simple structure while preventing exhaust interference. Is possible.

DESCRIPTION OF SYMBOLS 10: Fuel gas supply part 20: Secondary combustion air supply piping 30: Annular member 31: Secondary combustion air inlet 32: Secondary combustion air supply port 43: Tube outer peripheral wall 43 of downstream end: Tube outer peripheral wall 52: Primary combustion air introduction branch pipe 53: Primary combustion air supply pipe 80: Combustion cylinder 100: Bunsen burner device A1: Primary combustion air A2: Secondary combustion air F: Fuel gas L1: Fuel cylinder axis L2: Tube axis S2: Combustion flow path S3: Secondary combustion air flow path

Claims (7)

In a Bunsen burner apparatus comprising a fuel gas supply unit that supplies fuel gas, and a combustion cylinder that internally forms a combustion flow path for burning the fuel gas supplied from the fuel gas supply unit,
A first combustion air receiving port for receiving the first combustion air and a first combustion air supply port for supplying the first combustion air are provided at the downstream end of the combustion cylinder in the flow direction of the fuel gas. 1 with a combustion air inlet,
A state in which a first combustion air supply pipe through which a first combustion air supplied from a first combustion air supply source flows to the outside is connected to the first combustion air receiving port. Bunsen burner device equipped with.   The first combustion air introduction portion surrounds a cylinder outer peripheral wall at a downstream end of the combustion cylinder in the flow direction of the fuel gas, and is configured to directly follow the cylinder outer peripheral wall of the combustion cylinder. The Bunsen burner device according to claim 1, comprising a ring member that internally forms a first combustion air flow path through which working air flows.   The annular member has a single first combustion air receiving port in the circumferential direction of the cylinder outer periphery of the combustion cylinder, and a plurality of the first members formed at equal intervals in the circumferential direction of the cylinder outer periphery of the combustion cylinder. The Bunsen burner device according to claim 2, which has one combustion air supply port. The combustion cylinder is provided with a second combustion air introduction branch pipe capable of introducing the second combustion air into the combustion cylinder,
2. A second combustion air supply pipe through which second combustion air existing outside the ambient atmosphere of the combustion cylinder flows is provided so as to be connectable to the second combustion air introduction branch pipe. The bunsen burner apparatus as described in any one of -3.   5. The Bunsen burner device according to claim 4, wherein the second combustion air introduction branch pipe is provided in a state in which the tube axis forms an angle larger than 0 degrees with respect to the cylinder axis of the combustion cylinder.   The Bunsen burner device according to any one of claims 1 to 5, wherein the first combustion air supply source is configured by a compressor capable of pressure-feeding the first combustion air to the first combustion air supply pipe. . In a Bunsen burner body comprising a fuel gas supply part for supplying fuel gas, and a combustion cylinder that forms a combustion flow path for burning the fuel gas supplied from the fuel gas supply part,
A first combustion air receiving port for receiving the first combustion air and a first combustion air supply port for supplying the first combustion air are provided at the downstream end of the combustion cylinder in the flow direction of the fuel gas. 1 with a combustion air inlet,
The first combustion air supply inlet allows the first combustion air supplied from the first combustion air supply source to flow inside and is disposed outside the combustion cylinder. Bunsen burner body is configured to be connectable.

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