JP3058152U - Burner - Google Patents

Abstract

(57) [Summary] [Problem] A high-heat flame can be generated by taking in a large amount of air, and the structure is simple.
Provides burners with excellent safety. A hand burner includes a tubular burner main body. The burner main body 12 has a socket member 14 having two forks 20 at one end (upstream side) in the axial direction.
(Primary air introduction part) is connected, and the burner head 16 is connected to the other end (downstream side) in the axial direction. The nozzle member 28 is connected to the socket member 14, and gaseous fuel is injected from the nozzle hole 38a. In the burner main body 12, first and second injector sections 48 and 52 are arranged at an interval, and in the burner head 16, a third injector section 62 is arranged. The first, second, and third injector sections 48, 52, and 62 respectively include linear cylindrical bodies 66 and 7,
2, 80 and tapered cylindrical bodies 68, 74, 82.
The burner main body 12 has a secondary air introduction part 50 and a tertiary air introduction part 54 at intervals in the axial direction, and the burner head 16 has a quaternary air introduction part 6 on the upstream side in the axial direction.
4

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a burner, particularly a small low-pressure hand burner used to heat a local or entire article, for example, for browning food such as grilled tofu and grilled fish, burning charcoal or quenching metal. The present invention relates to a gas burner and a burner used as a heat source of a food machine such as a cooking heater.

[0002]

[Prior art]

 FIG. 6 is a schematic sectional view showing a main part of an example of a conventional hand burner as a background of the present invention. In the conventional hand burner 1, the primary air and the secondary air taken in from the primary air inlet 5 and the secondary air inlet 7 are mixed with the gas injected from the nozzle hole 3 into the burner head 1a. You. Then, when the mixed gas is ignited and burned, a flame is injected from the vicinity of the center of the outlet 9 of the burner head 1a.

[0003] FIG. 7 is a sectional view of a relevant part showing another example of a conventional hand burner which is a background of the present invention. FIG. 8 is a cross-sectional view of a relevant part showing still another example of the conventional hand burner as the background of the present invention. Compared with the conventional hand burner 1 shown in FIG. 6, these conventional hand burners 1 are provided near the outlet 9 of the burner head 1a on the extension of the nozzle hole 3 in order to prevent the flame from “blowing out”. Adjustment members 2 and 4 for adjusting the blowing speed from the burner head 1a are provided respectively. The adjusting member 2 of the hand burner 1 shown in FIG. 7 has, for example, five flame ports 2a parallel to the axis of the burner head 1a. The adjusting member 4 of the hand burner 1 shown in FIG. 8 has, for example, two flame ports 4a and 4b in a direction oblique to the axis of the burner head 1a. Each of the adjusting members 2 and 4 has a function as an obstacle for reducing the flow velocity of the mixed air when the mixed air injected from the burner head 1a is applied thereto.

FIG. 9 is a cross-sectional view of a relevant part showing another example of a conventional hand burner as a background of the present invention. This conventional hand burner 1 is a hand burner that is used by increasing the pressure of the gas itself emitted from the nozzle holes 3 as compared with the above-described conventional hand burners 1. In this hand burner 1, if the primary air inlet 5 is made large, the "blowing out" phenomenon may occur. Therefore, the primary air inlet 5 is formed small in order to prevent it. In this hand burner 1, since a high-pressure gas is emitted from the nozzle hole 3, the inside of the burner head 1a is in a low pressure state (almost a vacuum state), and the flame injected from the burner head outlet 9 enters the burner head 1a. It is pulled. Therefore, the flame can be injected from the burner head outlet 9 in a state where the flame is stabilized. In the hand burner 1 shown in FIG. 9, since the pressure of the gas itself is increased, a large amount of calorific heat can be generated as compared with the above-described conventional hand burners.

FIG. 10 is a schematic sectional view showing a main part of still another example of a conventional hand burner as a background of the present invention. In the conventional hand burner 1, a large amount of air mixed with the gas emitted from the nozzle holes 3 is supplied by the compressor 6. An adjusting member 8 for adjusting the blowing speed from the burner head 1a is provided near the outlet 9 of the burner head 1a. The adjusting member 8 has, for example, eight flame openings 8a parallel to the axis of the burner head 1a. By the high-pressure air supplied by the compressor 6, the gas emitted from the nozzle holes 3 is sucked into the burner head 1a and mixed with the air. Then, a flame is injected from the outlet 9 of the burner head 1a. In the hand burner 1 shown in FIG. 10, a large amount of air can be taken in by increasing the flow rate of the mixed gas by the compressor 6.

[0006]

[Problems to be solved by the invention]

 However, in such a conventional hand burner, the supply amount of air mixed with fuel gas is limited to some extent. Therefore, it was difficult for the conventional hand burner to generate a larger amount of heat.

In the conventional hand burner 1 shown in FIG. 6, the mixed air is burned on the same line as the nozzle hole 3 from which the gas is emitted, so that the primary air inlet 5 and the secondary air inlet 7 Of primary air and secondary air are small. Also, if the air inlets are enlarged, a so-called "blown out" phenomenon occurs in which the flame goes away from the burner head 1a and disappears. Therefore, in the conventional hand burner 1 shown in FIG. 6, it was difficult to generate a high calorie calorie without any trouble.

In the conventional hand burner 1 shown in FIGS. 7 and 8, compared to the hand burner 1 shown in FIG. 6, the action of the adjusting members 2 and 4 can prevent the phenomenon of “blowing out”. On the other hand, since the flow velocity of the mixed air injected from the burner head 1a falls on the adjusting members 2 and 4, the primary air and the secondary air taken in from the primary air inlet 5 and the secondary air inlet 7 are reduced. Not enough. Therefore, even with the conventional hand burner 1 shown in FIGS. 7 and 8, it was difficult to generate high calorie heat.

The conventional hand burner 1 shown in FIG. 9 can generate a high calorie calorific value, but must be used by increasing the gas pressure itself, and cannot be used for low-pressure city gas. . In addition, since the gas pressure itself is set to a high pressure, it is dangerous for indoor use and lacks safety.

[0010] In the conventional hand burner 1 shown in FIG. 10, since more air is supplied to the compressor 6, high calorie heat can be generated. However, the compressor 6 must be used, which is expensive. It becomes something.

[0011] Therefore, a main object of the present invention is to provide a burner which can generate a high calorific flame by taking in a large amount of air, and has a simple structure and excellent safety. That is.

[0012]

[Means for Solving the Problems]

 The invention according to claim 1 is provided with a cylindrical burner main body, a gas introduction passage provided at one axial end of the burner main body, for introducing gaseous fuel, and a gas supply passage provided downstream of the gas introduction passage. A nozzle section for ejecting gaseous fuel, a primary air introduction section for introducing primary air into the gaseous fuel ejected from the nozzle section, and a primary air introduction section provided downstream of the primary air introduction section. A first injector section that mixes and jets air and the gaseous fuel and ejects the secondary air into an air-fuel mixture that is provided downstream of the primary air introduction section and that is ejected from the first injector section; A secondary air introduction section to be introduced, and a second injector section disposed downstream of the first injector section, wherein a mixture of air and secondary air ejected from the first injector section are mixed and ejected. And a second air inlet disposed downstream of the secondary air inlet. A tertiary air introduction unit for introducing tertiary air into the air-fuel mixture ejected from the injector unit, and a tertiary air introduction unit disposed downstream of the second injector unit and tertiary air-fuel mixture ejected from the second injector unit. A third injector section that mixes and ejects air and quaternary air that is disposed downstream from the tertiary air introduction section and introduces quaternary air into the mixture that is ejected from the third injector section. An air-fuel mixture, which is provided downstream of the burner main body and is introduced from the third injector section, is mixed with the quaternary air and is ejected, and a flame formed by burning the air-fuel mixture is formed. And a burner head for jetting. In the invention according to claim 1, the first injector section, the second injector section, and the third injector section respectively have a straight cylindrical body having opposite side surfaces parallel to each other, and a straight cylindrical body. And a tapered cylindrical body having a tapered part whose opposite side surfaces are symmetrically inclined.The linear cylindrical body is disposed downstream of the tapered cylindrical body, and the tapered part is upstream. It may be formed to taper from the side toward the downstream side. In the invention according to claim 2, it is effective if the straight cylindrical body is formed in a cylindrical shape and the tapered cylindrical body is formed in a truncated conical cylindrical shape. In the invention according to claim 2 or 3, the inner diameter of the large end of the tapered cylindrical body of the first injector is formed to be at least twice as large as the inner diameter of the linear cylindrical body of the first injector. The length of the linear cylinder of the first injector section in the axial direction is substantially the same as or longer than the inner diameter of the linear cylinder of the first injector section, and the tapered cylinder of the first injector section is formed. It is even more effective if the axial length of the body is formed smaller than the inner diameter of the large end of the tapered cylindrical body of the first injector portion. In the invention according to any one of claims 2 to 4, the inner diameter of the linear cylinder of the second injector portion is larger than the inner diameter of the linear cylinder of the first injector portion, and The distance between the downstream end of the first injector section and the downstream end of the second injector section is smaller than the inner diameter of the main body, and the interval between the downstream end of the first injector section and the linear cylinder of the first injector section is It is even more effective if it is formed smaller than the inner diameter. In the invention according to any one of claims 2 to 5, the distance between the downstream end of the second injector section and the downstream end of the third injector section is equal to the second injector section. The inner diameter of the linear cylinder of the third injector is formed to be at least twice as large as or smaller than the inner diameter of the linear cylinder of the third injector. The inner diameter of the large end of the tapered cylindrical body of the third injector portion is formed to be substantially the same as the inner diameter of the burner main body, and the axial length of the linear cylindrical body of the third injector portion is set to the third. It is even more effective if the injector is characterized in that it is formed to be substantially the same as or larger than the inner diameter of the linear cylindrical body of the injector section. In the invention according to any one of claims 2 to 6, the downstream end of the third injector is disposed at a predetermined interval upstream of the other end in the axial direction of the burner head. The inner diameter of the burner head is formed to be larger than the inner diameter of the linear cylinder of the third injector part, and the inner diameter of the large end of the tapered cylindrical body of the third injector part is substantially equal to the inner diameter of the burner head. It is even more effective if it is characterized by being formed in the same manner. In the invention according to any one of claims 2 to 7, the diameter of the air introduction hole of the quaternary air introduction unit is one third of the diameter of the air introduction hole of the secondary air introduction unit or the tertiary air introduction unit. It is even more effective if it is characterized in that it is formed to about one-fourth. [Operation] In the burner according to the first aspect, primary air is sucked from the primary air introduction section by kinetic energy when gaseous fuel is injected from the nozzle section. The sucked primary air is mixed with gaseous fuel in the first injector to form an air-fuel mixture, and the air-fuel mixture is injected downstream from the first injector. Then, the air-fuel mixture injected from the first injector passes through the second injector and the third injector in this order. At this time, the secondary air sucked from the secondary air inlet and the tertiary air sucked from the tertiary air inlet are mixed with the air-fuel mixture injected from the first injector. Further, the air-fuel mixture injected from the third injector unit is mixed with the quaternary air sucked from the quaternary air introduction unit, and is injected downstream. Then, the injected air-fuel mixture is ignited near the burner head outlet, and a flame is injected from the burner head. As the air-fuel mixture exits the burner head and burns, air is further taken in by combustion from around the flame and burned. In this case, similarly to the burner according to the first aspect, it is possible to supply more air to the gaseous fuel injected from the nozzle portion than the primary air introduction portion to the quaternary air introduction portion, thereby increasing the calorie. The calorific value is obtained. In the burner according to the second and third aspects, the mixture of the gaseous fuel and the primary air injected from the nozzle portion passes through the linear cylinder from the tapered cylinder of the first injector. As a result, the fuel is injected toward the downstream side of the first injector in a state where the flow velocity is increased. Since the second injector section and the third injector section also have a tapered cylindrical body and a linear cylindrical body, respectively, the second injector section and the third injector section pass through the second injector section and the third injector section, respectively. The flow rate of the injected air-fuel mixture increases. In the invention according to claim 4, the relative relationship among the inner diameter of the straight cylindrical body of the first injector portion, the axial length, the large-end inner diameter, the small-end inner diameter of the tapered cylindrical body, and the axial length is determined. A predetermined relationship is set, and the amount and flow rate of the primary air taken in from the primary air introduction section are increased by the cooperation of the first injector section and the primary air introduction section. Therefore, flashback at the primary air introduction section is prevented. In the invention according to claim 5, the second injector portion is disposed at a distance downstream of the first injector portion, and the inner diameter and the axial length of the linear cylinder of the second injector portion are arranged. The relative relationship between the large-diameter inner end, the small-end inner diameter, the axial length, and the burner body of the tapered cylindrical body is set to a predetermined relationship, and the first injector section and the second injector section are connected to the secondary injector. By the cooperative action with the air introduction part, the mixture of the primary air and the gaseous fuel injected from the first injector part has a high flow velocity and the inner diameter of the linear cylinder of the second injector part. Spread out full. Therefore, the pressure in the passage secured between the first injector section and the second injector section becomes low, and the secondary air is sucked from the secondary air introduction section. Then, the secondary air is mixed with a mixture of the primary air and gaseous fuel injected from the first injector, and is ejected downstream from the straight cylindrical body of the second injector. In the invention according to claims 6 and 7, the third injector section is disposed at a predetermined interval downstream of the second injector section, and the third injector section has a straight cylindrical body. The inner diameter, axial length, large-end inner diameter and small-end inner diameter of the tapered cylindrical body, axial length, and the relative relationship between the burner body and the burner head are set to predetermined relationships. By the action of the third injector section, the tertiary air introduction section, the quaternary air introduction section, and the burner head, the air-fuel mixture injected from the second injector section at a high flow rate fills the burner body. Therefore, the pressure in the passage secured between the burner main body and the second injector section becomes low, and the tertiary air is sucked from the tertiary air introduction section. The tertiary air is mixed with the mixture of the secondary air and the gaseous fuel injected from the second injector, and is injected into the third injector. In this case, in particular, the interval between the downstream end of the second injector and the downstream end of the third injector should be at least twice as large as the inner diameter of the linear cylinder of the second injector. As a result, the mixing ratio between air (primary air and secondary air) and gaseous fuel is increased, and the flow rate of the air-fuel mixture is also increased. In addition, since more air can be taken in from the secondary air introduction section and the tertiary air introduction section, flashback near the distal end of the linear cylinder of the second injector section is prevented. Further, the air-fuel mixture injected into the third injector section is injected from the linear cylinder while the flow velocity is increased by the action of the tapered and linear cylinders of the third injector section. Is done. At this time, the pressure in the passage secured between the third injector unit and the burner head becomes low, so that the quaternary air is sucked from the quaternary air introduction unit. Therefore, the air-fuel mixture injected from the third injector is injected from the periphery of the burner head outlet, not on the extension of the axis of the nozzle from which the gaseous fuel is injected, that is, not on the axis of the burner body. . That is, the air-fuel mixture is not burned on the extension of the axis of the burner body, but is burned on the extension of the peripheral portion of the burner body. In the invention according to claim 8, the diameter of the plurality of air introduction holes of the quaternary air introduction unit is set to one third to one fourth of the diameter of the air introduction holes of the secondary air introduction unit or the tertiary air introduction unit. With such a configuration, the combustion of the air-fuel mixture near the downstream end of the linear cylinder of the second injector portion is prevented. In this case, the diameters of the plurality of air inlet holes of the quaternary air inlet and the length from the burner head outlet end to the quaternary air inlet when viewed in the axial direction of the burner body, that is, the burner body It is important to set the axial position of. Specifically, if the diameters of the plurality of air introduction holes of the quaternary air introduction section are too large, the phenomenon of “blowing out” occurs. Conversely, if the diameters are too small, the flame does not gain momentum. There is a risk of burning at the end of the straight cylindrical body of the injector portion of No. 2.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

[0014]

[Embodiment of the invention] 【Example】

 FIG. 1 is a side elevational view showing an embodiment of the present invention and showing a main part in a semi-illustrated longitudinal section. FIG. 2 is a partial cross-sectional schematic view showing the periphery of the burner of FIG. 1 and particularly around the first injector section and the second injector section. FIG. 3 is a partially sectional schematic view showing the entire main part of the burner shown in FIGS. 1 and 2. The burner 10 includes, for example, a cylindrical burner body 12. A socket member 14 is disposed at one axial end of the burner main body 12, and a burner head 16 is disposed at the other axial end of the burner main body 12. In the burner 10 of the present embodiment, one end of the burner body 12 in the axial direction will be referred to as the upstream side, and the other end in the axial direction will be referred to as the downstream side.

The socket member 14 includes a disk-shaped bottom portion 18. The bottom portion 18 is formed with arc-shaped bifurcated pieces 20, 20 facing each other at intervals in the radial direction. The bottom portion 18 has, for example, a circular through hole 22 in the center thereof as a connection hole for connecting a nozzle portion 28 described later. A female screw portion 24 is formed on the inner peripheral surface of the through hole 22. A male screw portion 26 for screwing the socket member 14 to one end of the burner main body 12 in the axial direction is formed on the arc-shaped outer peripheral surface of the bifurcated pieces 20, 20.

A nozzle portion 28 is disposed on one end side in the axial direction of the burner main body 12 via a socket member 14. A gas introduction pipe 30 is connected to the nozzle section 28 as a gas introduction path for introducing gaseous fuel. At the axially downstream end of the gas introduction pipe 30 connected to the nozzle portion 28, a female screw portion 30a to be screwed with a male screw portion 40 of the nozzle portion 28 described later is formed on the inner peripheral surface thereof. . The nozzle portion 28 is for jetting the gaseous fuel fed from the gas introduction pipe 30 toward the burner main body 12 and the burner head 16 on the downstream side. The gas introduction pipe 30 penetrates the handle 32 of the hand burner 10 and is connected to gas supply means 34 for supplying gaseous fuel to the gas introduction pipe 30. The supply amount of the gaseous fuel supplied from the gas supply means 34 is adjusted by the gas supply cock 36, and is fed into the downstream burner main body 12 via the gas introduction pipe 30.

The nozzle section 28 includes a nozzle section main body 38 having a nozzle hole 38a at one end in the axial direction. The nozzle hole 38a is disposed so as to face the axial center of the burner main body 12 on the downstream side. On one side (upstream side) of the nozzle portion main body 38 in the axial direction, a male screw portion 40 for screwing and connecting to the female screw portion 30a of the gas introducing pipe 30 is formed on the outer peripheral portion. On the other side (downstream side) of the nozzle portion main body 38 in the axial direction, a male screw portion 42 for screwing and connecting to the female screw portion 24 of the socket member 14 is formed on the outer peripheral portion. In this case, a flange portion 44 is formed at an outer peripheral portion of an intermediate portion in the axial direction of the nozzle portion main body 38. An external thread portion 40 is formed on the outer peripheral portion of the nozzle portion main body 38 upstream of the flange portion 44, and an external thread portion 42 is formed on the outer peripheral portion of the nozzle portion main body 38 downstream of the flange portion 44. It is to be noted that by appropriately changing the position of the flange portion 44 at the axially intermediate portion of the nozzle portion main body 38, it is possible to adjust the screw-in lengths of the one male thread portion 40 and the other male thread portion 42 of the nozzle body 38. Becomes possible.

Therefore, the male thread part 40 of the nozzle part body 38 and the female thread part 30 a of the gas introduction pipe 30 are screwed together, so that the gas introduction pipe 30 and the nozzle part 28 are connected. The male screw part 42 of the nozzle part main body 38 and the female screw part 24 provided on the bottom part 18 of the socket member 14 are screwed together, so that the socket member 14 and the nozzle member 28 are connected. In this case, the passage of the gaseous fuel of each member, that is, the inner diameter of each member, is gradually reduced toward the downstream side in a stepwise manner with respect to the gas introduction pipe 30, the nozzle body 38, and the nozzle hole 38a.

The socket member 14 is connected to the upstream side of the burner main body 12. That is, the female screw portion 46 is provided on the inner peripheral surface of one end in the axial direction of the burner main body 12. Then, the male screw part 26 of the socket member 14 and the male screw part 46 of the burner main body 12 are screwed together, so that the socket part 14 is connected to one end (upstream side) of the burner main body 12 in the axial direction. The socket member 14 is connected to the burner main body 12 in a state where the nozzle portion 28 is arranged at a predetermined position, and introduces primary air from between the forked pieces 20 of the socket member 14, and It has the function of supplying primary air to the gaseous fuel to be ejected.

In the burner main body 12, a first injector section 48 is provided downstream of the socket member 14 and the nozzle section 28. In the first injector section 48, the gaseous fuel ejected from the nozzle section 28 and the primary air introduced from between the two forks 20 of the socket member 14 are mixed, and the mixture is ejected.

A secondary air introduction unit 50 having a plurality of secondary air introduction holes 50 a is provided on the outer peripheral surface at one end side in the axial direction of the burner main body 12, downstream of the socket member 14. It is. Each of the plurality of secondary air introduction holes 50 a is formed by a through hole penetrating the outer peripheral surface of the burner main body 12. In the present embodiment, on the outer peripheral surface of the burner main body 12, for example, a group of twelve circular secondary air introduction holes 50a is arranged at appropriate intervals in the circumferential direction thereof in a ring shape, and the secondary air introduction section 50 is formed. Is formed as Each of the secondary air introduction holes 50a is provided through the burner main body 12 in a direction orthogonal to the axis of the burner main body 12. Each of the secondary air introduction holes 50a has a diameter of, for example, 8 mm. Secondary air is introduced from the outside from the secondary air introduction unit 50, and the secondary air is supplied to the air-fuel mixture ejected from the first injector unit 48.

Further, in the burner main body 12, a mixture of air and gas discharged from the first injector 48 and the secondary air are disposed downstream of the first injector 48 and mixed and discharged. A second injector section 52 is provided. A tertiary air introduction unit 54 is provided on the outer peripheral surface of the burner main body 12 downstream of the secondary air introduction unit 50. The tertiary air introduction unit 54 includes a plurality of tertiary air introduction holes 54a having the same structure as the secondary air introduction unit 50, and introduces tertiary air from the outside to supply the tertiary air to the second injector unit 52. It is.

As shown in FIG. 3, for example, a cylindrical burner head 16 is disposed at the other end (upstream side) of the burner main body 12 in the axial direction. In this case, a male screw portion 58 is formed on the outer peripheral surface of the other end of the burner main body 12 in the axial direction. On the inner peripheral surface at one end (downstream side) in the axial direction of the burner head 16, a female screw portion 60 screwed to the male screw portion 58 is formed. Then, the male screw part 58 of the burner main body 12 and the female screw part 60 of the burner head 16 are screwed together, so that the burner head 16 is connected to the tip of the burner main body 12.

The burner head 16 is disposed downstream of the second injector section 52, and is provided with an air-fuel mixture ejected from the second injector section 52 and a tertiary air introduced from the tertiary air introduction section 54. A third injector unit 62 that mixes air and ejects the air-fuel mixture is provided. Further, on one end side (downstream side) of the burner head 16 in the axial direction, a quaternary air introduction unit 64 for introducing quaternary air is provided on an outer peripheral surface thereof. The quaternary air introduction section 64 includes a plurality of quaternary air introduction holes 64 a having the same structure as the above-described secondary air introduction section 50 and tertiary air introduction section 54, and is ejected from the third injector section 52. It supplies quaternary air to the mixture.

Next, a specific structure of the first injector section 48, the second injector section 52, and the third injector section 62 and a mounting structure thereof will be described. The first injector section 48 includes, for example, a cylindrical straight cylindrical body 66 whose opposite side surfaces are parallel. One end of the straight cylindrical body 66 in the axial direction is connected to a tapered cylindrical body 68 having, for example, a truncated cone shape having a tapered portion 68a whose opposite side surfaces are symmetrically inclined. The taper 68a is formed so as to taper from the upstream side to the downstream side. That is, in this embodiment, the small-diameter peripheral edge of the tapered cylindrical body 68 and the one-end peripheral edge in the axial direction of the linear cylindrical body 66 are connected. Further, a flange portion 70 is formed so as to protrude outward from a large-diameter peripheral edge portion of the tapered cylindrical body 68. Then, the linear injector 66, the tapered cylinder 68, and the flange 70 are integrally formed of, for example, a metal material to form the first injector 48.

In this case, the large-diameter inner diameter D ₁ of the tapered cylindrical body 68 of the first injector portion 48 is the internal diameter D ₂ of the linear cylindrical body 66 (in the present embodiment, the small-diameter internal diameter of the tapered cylindrical body 68 is small). Approximately the same as above). The length L ₁ of the straight cylindrical body 66 in the axial direction is substantially the same as or longer than the inner diameter D ₂ of the straight cylindrical body 66. Further, the axial length (cone length) L ₂ of the tapered cylindrical body 68 is formed smaller than the large-end inner diameter D ₁ of the tapered cylindrical body 68. In the present embodiment, the inner diameter D ₁ of the large end of the tapered cylindrical body 68 is formed to be substantially the same as the length between the forks 20 of the socket member 14.

The second injector section 52 has substantially the same structure as the first injector section 48, but in particular, the second injector section 52 has a flange portion as compared with the first injector section 48. It has a large axial length, and has a through hole 78 in its flange portion communicating with the secondary air introduction hole 50a. That is, the second injector section 52 includes a linear cylindrical body 72, a tapered cylindrical body 74 connected to the linear cylindrical body 72, and a flange section 76, and the flange section 76 includes a plurality of 2. At positions corresponding to the secondary air introduction holes 50a, there are provided through holes 78 communicating with the secondary air introduction holes 50a. These through holes 78 are respectively provided through the flange portion 76 in a direction perpendicular to the axis center of the second injector portion 52. These through holes 78 are annularly arranged at intervals in the circumferential direction of the outer peripheral surface of the flange portion 76. These through holes 78 have a function of introducing secondary air into the burner main body 12 in cooperation with the secondary air introduction holes 50a.

In this embodiment, the inner diameter D of the linear cylinder 72 of the second injector 52_Three(In this embodiment, the inner diameter of the straight cylindrical body 66 of the first injector portion 48 is substantially the same as the small end inner diameter of the tapered cylindrical body 74.)_TwoAnd the inner diameter D of the burner body 12 _Four It is formed smaller than. Further, a distance L between a downstream end of the first injector section 48 and a downstream end of the second injector section 52 is set._ThreeIs the inner diameter D of the linear cylinder 66 of the first injector section 48._TwoIt is formed smaller than. In the present embodiment, the large-end outer diameter of the tapered cylindrical body 74 of the second injector section 52 is formed to be substantially the same as the inner diameter of the burner main body 12.

In the present embodiment, first, the second injector 52 is inserted from one end (upstream side) of the burner main body 12 in the axial direction. Then, the flange portion 76 of the second injector portion 52 is locked to the square wall surface of the step portion 56 provided at one axial end of the burner main body 12. Next, the first injector section 48 and the socket member 14 are inserted into the burner main body 12 in that order from one end (upstream side) in the axial direction of the burner main body 12. Then, the male screw part 26 of the socket member 14 and the female screw part 46 of the burner main body 12 are screwed together, and the socket member 14 is connected to one end of the burner main body 12 in the axial direction.

In this case, the flange portion 76 of the second injector portion 52 is pressed against the step portion 56 and the end surface of the flange portion 70 of the first injector portion 48 is attached to the end surface of the flange portion 76 of the second injector portion 52. Is pressed. That is, the first injector section 48 and the second injector section 52 are disposed in the burner main body 12 by being pressed and sandwiched between the step section 56 of the burner main body 12 and the socket member 14.

The third injector section 62 includes a straight cylindrical body 80 and a tapered cylindrical body 82 and a flange section 84 connected to the linear cylindrical body 80, similarly to the first injector section 48 and the second injector section 52. Including. In the present embodiment, first, the third injector 62 is inserted from one end (upstream side) of the burner head 16 in the axial direction. Then, the flange portion 84 of the third injector portion 62 is locked to a square wall surface of a step portion 86 provided at one axial end of the burner head 16. Next, the burner main body 12 is inserted from one end (upstream side) of the burner head 16 in the axial direction. In the burner main body 12, a first injector section 48 and a second injector section 52 are arranged, and the socket member 14 is connected. Then, the male screw part 58 of the burner main body 12 and the female screw part 60 of the burner head 16 are screwed together, so that the burner head 16 is connected to the other end (downstream side) of the burner main body 12 in the axial direction.

In this embodiment, the distance L ₄ between the downstream end of the second injector section 52 and the downstream end of the third injector section 62 is equal to the distance L ₄ of the second injector section 52. It is formed to be twice or more than twice the inner diameter D ₃ of the straight cylindrical body 72. Further, the inner diameter D ₅ of the linear cylindrical body 80 of the third injector section 62 (substantially the same as the small-end inner diameter of the tapered cylindrical body 82 in the present embodiment) is linear in the second injector section 52. The inner diameter D ₃ of the cylindrical body 72 is formed to be substantially the same as or smaller than the inner diameter D _3. The large-diameter inner end of the tapered cylindrical body 82 of the third injector portion 62 is formed to be substantially the same as the inner diameter D ₄ of the burner main body 12. Further, the axial length L ₅ of the linear cylindrical body 80 of the third injector 62 substantially is equal to or greater the internal diameter D ₅ of the linear cylindrical body 80 of the third injector 62. In this embodiment, the inner diameter of the large end of the tapered cylindrical body 82 of the third injector portion 62 is formed to be substantially the same as the inner diameter of the burner main body 12.

The downstream end of the third injector portion 62 is disposed at a predetermined interval L ₆ upstream of the other end of the burner head 16 in the axial direction, and has an inner diameter of the burner head 16. D ₆ is formed to be larger than the inner diameter D ₅ of the linear cylinder 80 of the third injector portion 62. Further, the inside diameter of the large end of the tapered cylindrical body 82 of the third injector portion 62 is formed to be substantially the same as the inside diameter of the burner head 16.

Further, in this embodiment, the diameter of the air introduction hole 64 a of the quaternary air introduction part 64 is set to be equal to or smaller than the diameter of the secondary air introduction part 50 to the tertiary air introduction part 54 of the tertiary air introduction part 54. The hole 54a is formed to have a diameter of about 1/3 to 1/4 of the diameter.

In this embodiment, an adjusting member 88 made of, for example, a wire mesh is provided at the other end (downstream end) of the burner head 16 in the axial direction. As shown in FIG. 3, the adjusting member 88 includes a crown-shaped wire netting main body 88a, and a circle for attaching the wire netting body 88a to the outlet peripheral edge of the burner head 16 is provided at the edge of the wire netting body 88a. An annular mounting piece 88b is integrally formed. In this case, the mounting piece 88b is fixed to the inner peripheral surface near the outlet of the burner head 16 by welding, bonding, or the like so that the wire netting main body 88a projects from the outlet of the burner head 16. The adjusting member 88 has a function of gradually closing the gas supply cock 36 and dispersing the air-fuel mixture when the flame coming out of the burner head 16 is turned off. Therefore, it is possible to prevent a red fire from being emitted from the outlet of the burner head 16 and to reduce the occurrence of soot. Therefore, it is possible to prevent the pot bottom and the like from being stained black by soot of red fire.

In the burner 10 of this embodiment, the supply amount of the gaseous fuel supplied from the gas supply means 34 is adjusted by the gas supply cock 36, and is introduced into the nozzle 28 through the gas introduction pipe 30. Is done. The gaseous fuel introduced into the nozzle portion 28 is jetted downstream from the nozzle hole 38a of the nozzle portion 28, and passes through the first injector portion 48 and the second injector portion 52 in the burner main body 12. While being mixed with air, the air-fuel mixture is ejected from the burner head 16 outlet through the third injector section 62 in the downstream burner head 16. Then, when, for example, a fire is brought near the outlet of the burner head 16 to ignite, a flame 90 is blown out from the outlet of the burner head 16 as shown in FIG.

In the burner 10 of the present embodiment, the primary air is generated from between the forked portions 20 of the socket member 14 (primary air introduction portion) by the kinetic energy when the gaseous fuel is injected from the nozzle portion 28. The drawn primary air is mixed with gaseous fuel in the first injector section 48 in the burner main body 12 to form an air-fuel mixture, and the air-fuel mixture is a linear cylindrical body of the first injector section 48. 66 is ejected from the distal end (downstream end) to the burner head 16 on the downstream side. In this case, the mixture of the gaseous fuel and the primary air injected from the nozzle portion 28 is formed by the action of the first injector portion 48 and the socket member 14 (primary air introduction portion), that is, the first injector portion. By passing through the straight cylindrical body 66 from the tapered cylindrical body 68 of the part 48, the fuel is injected downstream of the first injector part 48 with the flow velocity increased. Therefore, flashback between the forked pieces 20, 20 of the socket member 14 (primary air introduction portion) is prevented.

Then, the air-fuel mixture injected from the first injector section 48 passes through the second injector section 52 in the burner main body 12 and the third injector section 62 in the burner head 16 in this order. At this time, the secondary air sucked from the secondary air inlet 50 and the tertiary air sucked from the tertiary air inlet 54 are mixed with the air-fuel mixture ejected from the first injector 48. You. In this case, due to the action of the second injector section 52 and the secondary air introduction section 50, the air-fuel mixture injected from the first injector section 48 is converted into a linear cylinder of the second injector section 52 at a high flow rate. It spreads all over the body 72. Therefore, the pressure in the passage 51 secured between the first injector section 48 and the second injector section 52 becomes low, and the secondary air is sucked from the secondary air introduction section 54.

Then, the air-fuel mixture injected from the first injector section 48 is mixed near the outlet of the first injector section 48, and is injected downstream from the linear cylinder 72 of the second injector section 52. Is done. In this case, the air-fuel mixture injected into the second injector section 52 has a linear shape with the flow velocity increased by the action of the tapered cylindrical body 74 and the linear cylindrical body 72 of the second injector section 52. It is injected from the cylinder 72. The length from the tip of the linear cylinder 72 of the second injector 52 to the tip (downstream end) of the linear cylinder 80 of the third injector 62 is the second injector 52. Is formed to be at least twice the inner diameter of the linear cylindrical body 72, the mixing ratio of air (primary air, secondary air) and gaseous fuel is increased, and the flow rate of the air-fuel mixture is further increased. Be faster. Then, the air-fuel mixture injected from the second injector section 52 is injected to the third injector section 62 in the burner head 16. Since more air can be sucked from the secondary air introduction part 50 and the tertiary air introduction part 54, a flashback near the distal end of the linear cylinder 72 of the second injector part 52 is prevented. Can be prevented.

The air-fuel mixture injected into the third injector section 62 has a linear shape with the flow velocity increased by the action of the tapered cylindrical body 82 and the linear cylindrical body 80 of the third injector section 62. It is injected from the cylinder 80. That is, since the second injector section 52 and the third injector section 62 also have a tapered cylindrical body and a linear cylindrical body, respectively, the second injector section 52 and the third injector section 62 are provided. , The flow rate of the air-fuel mixture injected after passing through each increases. In the burner head 16, the pressure in the passage 65 secured between the third injector section 62 and the burner head 16 becomes low, so that the fourth air is sucked from the fourth air introduction section 64. Therefore, the air-fuel mixture injected from the third injector portion 62 is not on the extension of the axis of the nozzle support portion 28 from which the gaseous fuel is injected, that is, not on the axis of the burner main body 12, but on the outlet of the burner head 16. Injected from the periphery. That is, the air-fuel mixture is not burned on the extension of the axis of the burner main body 12, but is burned on the extension of the peripheral portion of the burner main body 12.

Further, the air-fuel mixture injected from the third injector unit 62 is mixed with the quaternary air sucked from the quaternary air introduction unit 64 and is ejected to the outlet of the burner head 16 on the downstream side. . Then, the injected air-fuel mixture is ignited near the burner head 16 outlet as shown in FIG. 3, for example, and a flame 90 is injected from the burner head 16 outlet. As the air-fuel mixture burns out of the burner head 16 outlet, air is further taken in from around the flame 90 by diffusion and burned. In the burner 10, as described above, it is possible to supply a large amount of air such as primary air, secondary air, tertiary air, and quaternary air to the gaseous fuel injected from the nozzle portion 28. High calorie calories are obtained.

Further, in the present embodiment, the diameters of the plurality of air introduction holes 64 a of the quaternary air introduction unit 64 are set to be smaller than those of the air introduction holes 50 a of the secondary air introduction unit 50 to the air introduction holes 54 a of the tertiary air introduction unit 54. By forming the diameter to be about one third to one fourth of the diameter, combustion of the air-fuel mixture near the end of the linear cylinder 72 of the second injector 52 is prevented. In this case, the size of the diameter of the plurality of air introduction holes 64a of the quaternary air introduction section 64 and the distance from the outlet end of the burner head 16 to the quaternary air introduction section 64 when viewed in the axial direction of the burner main body 12. , That is, the setting of the axial position of the burner main body 12 is important. In this case, if the diameter of the plurality of air introduction holes 64a of the quaternary air introduction part 64 is too large, the phenomenon of “blowing out” occurs. On the other hand, if the diameter is too small, the flame does not gain momentum, May burn at the end of the linear cylinder 72 of the injector section 52.

FIG. 4 is an exploded perspective view showing another embodiment of the present invention, and FIG. 5 is a partially cutaway perspective view showing a main part of the embodiment of FIG. The present embodiment is a Chinese food burner 100 using the socket member 14, the burner main body 12, and the burner head 16 to which the nozzle 28 of the burner 10 of the above-described embodiment is connected. In this case, attachment portions 94 having, for example, four female screw portions 94a are arranged at intervals in the circumferential direction of the burner base 92. At one end (upstream side) in the axial direction of the nozzle portion 28 connected to the socket member 14, a male screw portion 40 that can be screwed to the female screw portion 94a is formed. Then, the nozzle portion 28 is vertically inserted into the mounting portion 94, and the male screw portion 40 of the nozzle portion 28 and the female screw portion 94a of the mounting portion 94 are screwed together. Attached to.

[0044]

[Effect of the invention]

 According to the invention of the present application, a flame having a high calorific value can be generated by taking in a large amount of air, and a burner having a simple structure and excellent safety can be obtained. Further, according to the invention of the present application, since a large amount of air can be taken in from the primary air introduction part, the secondary air introduction part, the tertiary air introduction part and the quaternary air introduction part, the diameter of the nozzle hole of the nozzle part is reduced. It is possible to set a large value. Therefore, a higher calorific value can be obtained.

[Brief description of the drawings]

FIG. 1 is a side elevational view showing an embodiment of the present invention and showing a main part in a semi-illustrated longitudinal section.

FIG. 2 is a partial cross-sectional schematic view showing the burner shown in FIG. 1 and particularly around a first injector section and a second injector section;

FIG. 3 is a partial cross-sectional illustrative view showing an entire main part of the burner shown in FIGS. 1 and 2;

FIG. 4 is an exploded perspective view showing another embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view showing a main part of the embodiment of FIG. 4;

FIG. 6 is an essential part cross-sectional view illustrating an example of a conventional hand burner as a background of the present invention.

FIG. 7 is an essential part cross-sectional view showing another example of the conventional hand burner as the background of the present invention.

FIG. 8 is an essential part cross-sectional view showing still another example of the conventional hand burner as the background of the present invention.

FIG. 9 is a cross-sectional view of a relevant part showing another example of a conventional hand burner as a background of the present invention.

FIG. 10 is an essential part cross sectional view showing still another example of the conventional hand burner as the background of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Burner 12 Burner main body 14 Socket member 16 Burner head 18 Bottom part 20 Bifurcated piece 22 Through hole 24, 30a, 46, 60 Female thread part 26, 40, 42, 58 Male thread part 28 Nozzle part 30 Gas introduction pipe 32 Handle part 34 Gas supply Means 36 Gas supply cock 38 Nozzle part body 38a Nozzle hole 44, 70, 76, 84 Flange part 48 First injector part 50 Secondary air introduction part 50a Secondary air introduction hole 52 Second injector part 54 Tertiary air introduction Portion 54a Tertiary air introduction holes 56, 86 Stepped portion 62 Third injector portion 64 Quaternary air introduction portion 64a Quaternary air introduction holes 66, 72, 80 Linear cylinders 68, 74, 82 Tapered cylinder 68a Taper Part 78 Through-hole 88 Adjusting member 88a Wire mesh main body 88b Mounting piece 90 Flame 92 Burner Base 94 mounting portion 94a internal thread portion 100 Chinese burner

Claims (8)

[Utility model registration claims] 1. A cylindrical burner main body, disposed at one axial end of the burner main body, a gas introduction path for introducing gaseous fuel, disposed downstream of the gas introduction path, A nozzle unit for ejecting gaseous fuel, a primary air introduction unit for introducing primary air into the gaseous fuel ejected from the nozzle unit, a primary air unit disposed downstream of the primary air introduction unit, And a first injector section that mixes and jets the gaseous fuel, and is disposed downstream of the primary air introduction section, and supplies secondary air to an air-fuel mixture that is jetted from the first injector section. A second air introduction unit to be introduced, which is disposed downstream of the first injector unit, and a second mixture in which the air-fuel mixture ejected from the first injector unit and the secondary air are mixed and ejected; Injector section, downstream from the secondary air introduction section And a tertiary air introduction unit for introducing tertiary air into the air-fuel mixture ejected from the second injector unit, and a tertiary air introduction unit disposed downstream of the second injector unit and the second injector unit. A third injector section that mixes and ejects the air-fuel mixture ejected from the tertiary air, and is disposed downstream of the tertiary air introduction section and that is ejected from the third injector section A quaternary air introduction unit for introducing quaternary air into the air, and a liquefied gas ejected from the third injector unit and the quaternary air, which are disposed downstream of the burner main body and are ejected. And a burner head for injecting a flame formed by burning the air-fuel mixture. 2. The first injector section, the second injector section, and the third injector section are respectively connected to a straight cylindrical body whose opposite side surfaces are parallel to each other and the straight cylindrical body. A tapered cylindrical body having a tapered portion whose opposite side surfaces are symmetrically inclined, wherein the linear cylindrical body is disposed downstream of the tapered cylindrical body, and the tapered portion is upstream. The burner according to claim 1, wherein the burner is formed so as to taper from a side toward a downstream side. 3. The burner according to claim 2, wherein the straight cylindrical body is formed in a cylindrical shape, and the tapered cylindrical body is formed in a truncated conical cylindrical shape. 4. An inner diameter of a large end of the tapered cylindrical body of the first injector portion is formed to be at least twice as large as an inner diameter of a linear cylindrical body of the first injector portion. The length of the straight cylindrical body in the axial direction is substantially the same as or longer than the inner diameter of the straight cylindrical body of the first injector section. The axial length of the tapered cylindrical body of the first injector section is The burner according to claim 2 or 3, wherein the length is formed smaller than the inner diameter of the large end of the tapered cylindrical body of the first injector portion. 5. The inner diameter of the linear cylinder of the second injector portion is formed larger than the inner diameter of the linear cylinder of the first injector portion and smaller than the inner diameter of the burner body. A distal end on the downstream side of the first injector section and the second injector section;
The distance between the injector and the downstream end of the injector is formed to be smaller than the inner diameter of the linear cylindrical body of the first injector. The burner described in. 6. The distance between the downstream end of the second injector and the downstream end of the third injector is determined by the inner diameter of the linear cylinder of the second injector. Wherein the inner diameter of the linear cylinder of the third injector portion is substantially the same as or smaller than the inner diameter of the linear cylinder of the second injector portion. The inner diameter of the large end of the tapered cylindrical body of the portion is formed to be substantially the same as the inner diameter of the burner main body, and the axial length of the linear cylindrical body of the third injector section is equal to that of the third injector section. The burner according to any one of claims 2 to 5, wherein the burner is formed to be substantially the same as or larger than the inner diameter of the straight cylindrical body. 7. A downstream end portion of the third injector portion is disposed at a predetermined interval upstream of the other end in the axial direction of the burner head, and an inner diameter of the burner head is: The inner diameter of the tapered cylindrical body of the third injector portion is formed to be substantially the same as the inner diameter of the burner head. The burner according to any one of claims 2 to 6, characterized in that: 8. The diameter of the air introduction hole of the quaternary air introduction part is about one third to one quarter of the diameter of the air introduction hole of the secondary air introduction part or the tertiary air introduction part. The burner according to claim 2, wherein the burner is formed.