JPH0227305Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pipe burner equipped with a flame stabilizing member for flame stabilization.

(Prior Art) In pipe burners, various methods have been devised for combusting fuel gas by pre-mixing the entire amount of air necessary for combustion. Conventionally, it is disclosed, for example, in Japanese Utility Model Publication No. 60-39613, and as shown in FIGS. 8 and 9, a cylindrical body B having a plurality of flame holes A arranged along the axial direction, The flame stabilizing member C was attached to the upper part of the cylinder B, and the flame stabilizing member C extended along the axial direction only to the side of each flame generated from the flame hole A.

(Problems to be solved by the invention) In the case of the above conventional pipe burner, the flame stabilizing members C are only provided on both sides of each flame, so they are provided over a long range along the axial direction of the cylinder B. There is a problem in that it is not possible to obtain uniform flames for each flame coming out of the large number of flame holes A, and differences in size and temperature occur between each flame in the axial direction. When the above-required amount is exceeded or when the temperature inside the combustion chamber becomes high, a flame floating phenomenon occurs, causing flame flashback and making it impossible to continue combustion.

In addition, Bunsen burners and other types with duct-type secondary air supply chambers are often used in naturally ventilated combustion chambers, but since these use a large amount of secondary air, only low-temperature gas can be obtained. figure,
Therefore, when using a cooker that is not suitable for supplying a large amount of air at low temperatures, such as a Kutsky furnace, it is installed in a closed room, shutting off outside air, and burning fuel using only primary air. The disadvantage was that it could not be applied.

In view of the above-mentioned drawbacks of the conventional methods, the present invention can be installed in a closed chamber to obtain a uniform flame over a long range of the cylinder, and also to continuously obtain a stable flame at a high temperature. The purpose is to provide pipe burners.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pipe burner equipped with a cylindrical body in which a plurality of flame holes are formed in a row along the axial direction. A flame stabilizing member having a uniform cross section that is continuous along the axial direction is provided along the row of the flame holes, with the drilling direction of the holes being inclined upward with respect to the vertical direction, and the flame stabilizing member has a direction in which the drilling direction a side plate that is tilted according to the flame holes and covers only the upper side of each flame generated from the flame holes along the row of flame holes; It is characterized by comprising an upper plate that is bent toward the row side of the flame holes.

(Function) According to the present invention, only the upper side of each flame coming out of each flame hole inclined upward with respect to the vertical direction is covered along the row by using the side plate of the flame stabilizing member having the side plate and the upper plate. , with the upper plate bent from the side plate toward the row side of each flame hole with a space above each flame hole, cover the upper part of the tip of each flame along the row, and protrude from each flame hole. Gas buoyancy is suppressed by the flame stabilizing member, and incomplete combustion is reduced to maintain each flame homogeneously and stably at a high temperature.

(Example) An example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a pipe burner according to an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal sectional view taken along the line X--X in FIG. 1.

The pipe burner includes a cylindrical body 1 having a plurality of flame holes 2 arranged along the axial direction, and a flame stabilizing member 3 with a uniform cap-shaped cross section attached to the upper surface of the cylindrical body 1.
, an ignition/detection section 4 provided at the upper part of one end of the cylindrical body 1, and a mixing supply section 5 shown in FIGS. 6 and 7 connected to one end of the cylindrical body 1. In the pipe burner, a mixture of fuel gas and air is fed into the cylindrical body 1 from the mixing supply section 5, and when the ignition/detection section 4 ignites the ignition flame hole 2a, the flame is sequentially transferred to the adjacent flame hole 2. All the flame holes 2 are ignited to obtain a uniform flame in the axial direction.

The tip of the cylindrical body 1 is closed with a blind plate 1a,
It has two rows of flame holes 2, 2 along the axis. These flame holes 2 are formed at a predetermined pitch, have the same diameter, have the perforation direction inclined upward with respect to the vertical direction as shown in Fig. 2, and are perforated in parallel to each other in two rows. Flame holes 2, 2 between them are arranged symmetrically with respect to a vertical plane P containing the diameter of the cylindrical body 1. Between the flame holes 2 and 2 of each row arranged at the tip of the cylindrical body 1 and the farthest end on the ignition/detection unit 4 side, there are a plurality of fire transfer holes arranged at equal intervals along the circumferential direction of the cylindrical body 1. Flame holes 2c and 2d are provided. In addition, on the ignition/detection unit 4 side, there are a plurality of ignition flame holes 2a, 2a and Detection flame holes 2d and 2b are provided.

The flame stabilizing member 3 is made of, for example, a stainless steel plate, and includes a base plate 3a that comes into contact with the outer surface of the cylindrical body 1, and side plates 3b, 3b that are bent from both sides of the base plate 3a along the approximate radial direction of the cylindrical body 1. , upper plates 3c, 3c are bent in directions away from each other at a substantially right angle from the upper ends of the respective side plates 3b, 3b, and have a uniform cross-section in the shape of a cap, which is symmetrical about a vertical plane P including the axis. As shown by the two-dot chain line in FIG. It has reached just before the flame hole 2c for transferring the flame.

The flame stabilizing member 3 is fixed to the cylindrical body 1 with a plurality of bolts 6 provided at predetermined intervals along the longitudinal direction of the substrate 3a.

As shown in FIG. 2, the side plates 3b, 3b are provided to be inclined in accordance with the drilling direction of the flame holes 2, 2, and are arranged above the upwardly extending portions of the flame holes 2, 2. , 2, only the upper side of the side of the flame is covered along the row of flame holes, and the lower side of the flame, which is the outer side, is open, and the height dimension H of the outer side of the flame is The distance is determined to be, for example, 6 to 7 times the diameter d, which can ensure the required flame length corresponding to the diameter d of the hole 2 and allow the fuel gas to complete combustion.

The upper plates 3c, 3c are arranged with their axial centers aligned with the axes of the flame holes 2, 2 in each row, and have a width dimension l.
is a predetermined value determined by the diameter d of the flame hole 2 as a value for maintaining the flame in a stable state, for example, 4 of d.
~8 times, and covers the upper part of the flame generated from each flame hole 2 in a direction perpendicular to the perforation direction of each flame hole, that is, the radial direction of the cylindrical body.

FIG. 3 is a side view showing the main parts of the ignition/detection section 4, FIG. 4 is a plan view thereof, and FIG. 5 is a Y--
It is a Y arrow view.

The ignition/detection section 4 is attached above the fuel gas upstream end of the cylindrical body 1, and includes an ignition tube 7 along the cylindrical body 1, a detection tube 8 for detecting the temperature of the flame, and the side of the tip of these tubes. Equipped with flame holding plates 9, 9, etc. that cover the
The tip of the ignition tube 7 is curved downward, and its leading edge faces one of the ignition flame holes 2a, and the tip of the detection tube 8 is arranged along the row of detection flame holes 2b. There is. The bases of the ignition tube 7 and the detection tube 8 are covered by a common cover 10, supported by a support member 11, and attached with bolts 13 via a mounting member 12 fixed to the upper surface of the cylindrical body 1. There is.

FIGS. 6 and 7 are a plan view and a partially vertical side view, respectively, showing the mixing supply section 5. FIG.

The mixing supply section 5 includes a pushing fan 14, a mixing chamber 15 connected to an outlet duct 14a of the fan 14, a gas supply pipe 16 whose tip is inserted into the mixing chamber 15, and an outlet of the mixing chamber 15. The distal end of the diverging tube 17 is connected to the cylindrical body 1 via an elbow 18. In addition,
The distal end of the diverging tube 17 may be linearly connected to the cylindrical body 1 without using the elbow 18. The fuel gas is then supplied through the gas supply pipe 16, discharged from a nozzle 16a provided at the tip of the gas supply pipe 16, mixed with air supplied by the fan 14 in the mixing chamber 15, and then in the diverging pipe 17. The mixture becomes homogeneous and is sent into the cylindrical body 1. The amount of air supplied is determined by a damper 14b provided on the suction side of the fan 14.
Adjusted by.

Next, a method of using the pipe burner according to the above embodiment of the present invention will be explained.

First, ignition gas is sent to the ignition pipe 7, and its tip is ignited by a known ignition means to generate an ignition flame.Meanwhile, fuel gas is supplied through the gas supply pipe 16, and it is sent from the nozzle 16a to the mixing chamber 15. At the same time, air is introduced by the fan 14, the fuel gas and air are mixed, and pushed into the diverging tube 17, where a homogeneous mixture is made.Furthermore, when this mixture is sent to the cylinder 1, it is used for ignition. The ignition flame hole 2a is ignited by the flame, and a flame is generated. The flame spreads sequentially to the flame holes on both sides, and flame is generated in all the flame holes 2 of the cylindrical body 1. The upper plate 3c of the flame holding member 3 suppresses the force of each flame to jump out of the flame hole 2, that is, the gas buoyancy, and at the same time, unburned gas disappears while reaching the height H from the outlet of the flame hole 2 to the upper plate 3c. It is stable at high temperatures and is uniformly distributed in the axial direction of the cylindrical body 1.

The flame stabilizing member 3 is heated by the flame and its temperature rises, and the heat is radiated into the combustion chamber from the side plate 3b and the upper plate 3c mainly by axial radiation and convection, so stainless steel is not enough to withstand the heat. can.

Further, since the flame stabilizing member 3 emits infrared rays when heated, it is also effective for heating the food to be cooked, and by selecting the material, a large amount of infrared rays can be generated. By providing the flame stabilizing member 3, the pipe burner according to the present invention does not require any special equipment for adjusting the supply of excess air, and generally the same method as the secondary air supply system may be used.

(Effect of the invention) The present invention is constructed as described above, in which the perforation direction of the flame hole is inclined upward with respect to the vertical direction, and the flame holding member with a uniform cross section continuous along the axial direction of the cylinder is attached to the flame hole. The side plates of the flame stabilizing member provided along the rows of the flame holes and inclined in accordance with the perforation direction cover only the upper sides of the flame holes along the rows of the flame holes. A space is provided above and an upper plate bent from the side plate toward the rows of flame holes covers the upper part of each flame, leaving the lower side of each flame open, so that the cylindrical body This has the effect of continuously ensuring a uniform, homogeneous, high-temperature, and stable flame over a long range. In addition, in this invention, by pressing the upper part of each flame with the upper plate,
Since the diameter of the flame becomes larger and the flame transfer between flame holes improves accordingly, it is possible to widen the pitch of the flame holes.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the main parts of a pipe burner according to an embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional view taken along the line X-X in Fig. 1, and Fig. 3 is a main part of the ignition/detection section. Fig. 4 is a plan view of the same, Fig. 5 is a side view showing the section.
The Y-Y arrow view in the figure, FIGS. 6 and 7 are respectively a plan view and a partially longitudinal side view showing the fuel gas mixing supply section, and FIGS. 8 and 9 are a front sectional view and a plan view, respectively. It is a diagram. 1... Cylindrical body, 1a... Blind plate, 2... Flame hole, 2
a...flame hole for ignition, 2b...flame hole for detection, 2c,
2d...flame hole for transferring fire, 3...flame holding member, 3a...
... Board, 3b... Side plate, 3c... Top plate, 4... Ignition/detection section, 5... Mixing supply section, 6... Bolt,
7... Ignition tube, 8... Detection tube, 9... Flame holding plate, 1
0...Cover, 11...Supporting member, 12...Mounting member, 13...Bolt, 14...Fan, 14a
...Exit duct, 14b...Damper, 15...
Mixing chamber, 16... Gas supply pipe, 16a... Nozzle, 17... Unwidened tube, 18... Elbow.

Claims (1)

[Scope of utility model registration request] In a pipe burner equipped with a cylindrical body in which a plurality of flame holes are formed in a row along the axial direction, the perforation direction of the flame holes is inclined upward with respect to the vertical direction, and the perforation direction of the flame holes is continuous along the axial direction. A flame stabilizing member having a uniform cross section is provided along the row of the flame holes, and the flame stabilizing member is provided to be inclined in accordance with the perforation direction, and includes only the upper side of each flame generated from each flame hole. a side plate that covers the flame hole along the row of flame holes; and an upper plate that is bent from the side plate toward the row of flame holes with a space above each flame hole. pipe burner.