JP3939593B2 - Burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a burner suitable for heating a large flat surface or curved surface of a surface to be heated, such as preheating the surface of a material in the process of transferring a plate material such as a steel plate to a product manufacturing process.
[0002]
[Prior art]
Conventionally, as shown in FIG. 6, a frame plate 2 (both side plates 2a, 2b and end plates 2c, 2d) is disposed around a rectangular main plate 1 as shown in FIG. A box-like burner body 3 is formed which is joined and closed at one end (upper end in FIG. 6) and opened at the other end (lower end side). A fuel supply pipe 4 is provided at the closed end of the burner body 3. The combustion plate 5 and the rectifying plate 6 are attached to the open end portion and the inner side of the open end portion, respectively, and the gap between the main plate 1 and the rectifying plate 6 is spaced from the inlet portion to the internal space 7 of the fuel supply pipe 4. A fuel deflection plate 8 that is opened and opposed to the main plate 1 is provided to support the main plate 1, and a mixed gas of fuel gas and air fed from the fuel supply pipe 4 is diffused around the fuel deflection plate 8 and then rectified. Rectified through the plate 6 and ejected from the vent of the combustion plate 5 to the outside of the burner body 3. Ignited by a spark of unillustrated spark plug, there is known a burner 9 which is to be burned.
[0003]
[Problems to be solved by the invention]
In the burner 9, the to-be-heated object that has been made substantially parallel to the combustion plate 5 in front of the combustion plate 5 by the combustion gas generated by the combustion of the mixed gas in front of the combustion plate 5 (downward in FIG. 6). The material is heated, but conversely, the edge of the frame plate 2 on the opening side of the burner body 3 is overheated to a high temperature due to reflected heat or radiant heat from the heated material to be heated, and is deformed and cracked. In addition, the mixed gas in the inner space 7 of the burner 9 is ignited (reverse ignited) by the reflected heat or radiant heat, and the mixed gas is generated on the front surface (front surface) of the combustion plate 5. May not burn properly.
Therefore, a cooling water pipe is provided on the outer periphery of the frame plate 2 of the burner body 3, or a cooling water jacket and an air cooling chamber are provided to flow cooling water and cooling air to them, so that at least the front end portion of the frame plate 2 is provided. Cooling around is done.
However, in this case, the structure of the burner body 3 is complicated, and a facility for supplying cooling water and cooling air to the burner 9 is required, which not only increases the manufacturing cost, but also the facilities including the burner 9. There is a problem that it takes time and effort to maintain and manage.
[0004]
The present invention has been made in view of the above circumstances, and reliably cools the periphery of the frame plate on the combustion plate side of the burner main body with a simple structure and is heated from the heated material heated by the burner combustion gas. An object of the present invention is to provide a burner that can prevent the frame plate from being burned out by reflected heat and prevent reverse ignition into the burner and can be easily maintained and managed.
[0005]
[Means for Solving the Problems]
The present invention is characterized by the following points in order to solve the above problems.
That is, the burner according to claim 1 is a box-shaped burner body having one end closed and the other end opened, and a closed end portion provided with a fuel supply pipe for introducing gaseous fuel therein, The combustion plate attached to the open end of the burner main body is opposed to the inlet portion of the fuel supply pipe to the burner main body, and is spaced from the inner end wall surface of the burner main body by a predetermined interval inside the burner main body. In the burner provided with the provided fuel deflecting plate, the fuel deflecting plate extends along substantially the entire inner wall surface of the burner body along the inner end wall surface of the closed end portion of the burner body, and the outer peripheral portion is the burner body. A deflection plate member supported by the burner body by forming an annular slit along the entire circumference of the inner circumferential wall and communicating the fuel supply pipe and the opening side of the burner body . Along the entire circumference of the outer periphery of the deflection plate member and A slit is provided between the end and the upper surface of the deflection plate member, and a peripheral plate fixed to the inner end wall surface of the burner body is provided, and communicated to the fuel supply pipe between the inner end wall surface of the burner body And a rectifying plate having a plurality of ventilation holes is provided between the deflection plate member and the combustion plate at a predetermined interval and supported by the burner body. It is characterized by being.
[0006]
A burner according to claim 2 is a box-like burner body having one end closed and the other end open, and a closed end portion provided with a fuel supply pipe for introducing gaseous fuel therein, and the burner body Between the combustion plate attached to the open end of the burner and the inlet of the fuel supply pipe to the burner body, and provided inside the burner body with a predetermined interval between the inner wall surface of the burner body. In the burner provided with a fuel deflecting plate, the fuel deflecting plate extends along substantially the entire inner wall surface of the burner body along the inner end wall surface of the closed end portion of the burner body, and the outer peripheral portion is an inner portion of the burner body. A deflection plate member supported by the burner body by forming an annular slit between the peripheral wall and the entire circumference of the inner circumferential wall and communicating the fuel supply pipe and the opening side of the burner body; A deflecting plate portion disposed along the outer periphery of the plate member Extending to the open end of the burner body toward the lower side, and joined to the bent portion of the frame plate bent inward before the open end of the burner body, the slit and A peripheral plate that forms a communicated annular fuel flow space with the inner peripheral wall of the burner body, and the combustion plate is fixed to the tip of the peripheral plate, and the deflection plate member, the combustion plate, A rectifying plate having a plurality of ventilation holes is provided to be supported by the burner body with a predetermined interval therebetween, and the fuel flow is provided by a plurality of ventilation holes provided over the entire circumference of the peripheral plate. The space is communicated with a space between the deflecting plate member and the rectifying plate .
[0009]
A burner according to a third aspect is the burner according to the first or second aspect , wherein a heat insulating material is attached to the outer periphery of the burner body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a burner according to an embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same or similar component as the conventional burner.
1 to 3 show a burner 10 according to a first embodiment of the present invention. This burner 10 is a frame plate comprising left and right (left and right in FIGS. 1 and 2) side plates 2a and 2b and front and rear (up and down in FIG. 1) side plates 2c and 2d around a rectangular main plate 1 in plan view. 2, a burner body 3 formed in a box shape with one end (upper end in FIG. 2) closed and the other end (lower end in FIG. 2) opened, and a heat-resistant metal wire knitted to form a net A combustion plate 5 attached to the open end of the burner body 3 in parallel to the main plate 1, and a large number of vent holes over the entire planar area, close to the open end of the internal space 7 of the burner body 3. A rectifying plate 6 mounted at a position parallel to the combustion plate 5 at a position, and a fuel positioned between the rectifying plate 6 and the main plate 1 in the internal space 7 and spaced from them. And a deflection plate 11.
[0011]
A fuel supply pipe 4 having a flange 4 a at the end is fixedly provided on the main plate 1 serving as a closed end of the burner body 3 so as to communicate with the internal space 7 of the burner body 3. A pair of connecting plates 12 and 12 having burner connecting holes 12a at the front and rear (upper and lower portions in FIG. 1) are fixed to the outer surface (upper surface) of the main plate 1 of the burner main body 3, and left and right end portions. A pair of mounting plates 13 and 13 having bolt holes 13a at positions closer to each other are along the longitudinal direction (vertical direction in FIG. 1) of the burner body 3, and both front and rear ends are connected to the connecting plates 12 and 12. It is fixed.
[0012]
Further, a heat insulating material 14 having a predetermined thickness is attached to the outer surface of the main plate 1 of the burner body 3, and the outer side thereof is covered with a holding plate 15 fixed to a portion of the frame plate 2 that protrudes outside the main plate 1. It has been broken. A plurality of heat insulating material plates 16 having a predetermined length having substantially the same thickness as the heat insulating material 14 and substantially the same width as the height of the frame plate 2 are arranged on the outer periphery of the frame plate 2 without any gap. Is provided. Each heat insulating material plate 16 is supported by a bolt 18 provided on the outer side of the frame plate 2 so as to protrude outside the frame plate 2 and tightened with a double nut 18a to tighten the side plates 2a to 2d. It is fixed to.
[0013]
The fuel deflection plate 11 extends substantially in the entire area of the internal space 7 of the burner body 3 along the inner end wall surface 1 a of the main plate 1 of the burner body 3, and the outer peripheral portion thereof is the inner peripheral wall 3 a of the burner body 3. And a rectangular deflection plate member 11a that forms a rectangular annular slit 19 along the entire inner peripheral wall 3a, and a rectangular annular shape along the outer periphery of the deflection plate member 11a. And a peripheral plate 11b for coupling the deflecting plate member 11a to the inner end wall surface 1a of the main plate 1, and a fuel introduction space 20 connected to the fuel supply pipe 4 between the inner end wall surface 1a of the main plate 1 Forming. The perimeter plate 11b is formed with a large number of vent holes 21 penetrating to the lower end side position close to the deflecting plate member 11a all around the perimeter plate 11b, and the fuel introduction space 20 and the slit 19 through the vent hole 21. Are communicating. The vent hole 21 may be a circular hole, a slit-shaped hole, or other appropriately shaped hole.
Although not shown, an ignition plug for igniting the fuel injected from the burner 10 faces the front of the open end of the burner body 3 on the burner body 3 or other appropriate support portion. Is provided.
[0014]
When the burner 10 having the above configuration is installed in a required heating device and used, the mounting plates 13 and 13 fixed to the burner body 3 are moved to the required positions of the heating device by bolts inserted into the bolt holes 13a. By attaching to the heating device, the burner 10 is attached to the heating device. When the heating device is operated, a mixed gas (gas fuel) obtained by mixing fuel gas and air is fed into the fuel introduction space 20 of the burner body 3 from the fuel supply pipe 4 of the burner 10 by a blower or the like. The mixed gas that has entered the fuel introduction space 20 passes through the vent holes 21 of the peripheral plate 11b of the fuel deflection plate 11 and the annular space 3b between the inner peripheral wall 3a of the side plates 2a to 2d of the burner body 3 and the peripheral plate 11b. Furthermore, after passing through the slit 19 and reaching the deflection plate member 11a and the rectifying plate 6, the rectifying plate 6 spreads and rectifies the entire area of the opening of the burner body 3, and then the combustion plate 5 Through the opening end of the burner body 3, and is ignited and burned by the ignition burner.
[0015]
A material to be heated such as a steel plate that moves while facing the front surface of the combustion plate 5 of the burner 10 is heated by the high-temperature combustion gas resulting from the combustion of the mixed gas. At that time, in the burner 10, the front end portion (the end portion on the combustion plate 5 side) of the frame plate 2 of the burner body 3 itself is heated by the reflected heat or radiant heat from the heated material to be heated. Since the mixed gas hits the inner peripheral wall 3a of the burner body 3 at a high flow velocity from the fuel introduction space 20 through the vent hole 21 and the frame plate 2 is rapidly cooled by the collision jet, the frame plate 2 is overheated to a high temperature. In addition, since the frame plate 2 is cooled by the mixed gas, the mixed gas flowing inside the combustion plate 5 of the burner body 3 is prevented from becoming high temperature.
[0016]
As described above, according to the burner 10 according to the embodiment, the mixed gas fed into the burner main body 3 has a high flow velocity toward the inner peripheral wall 3a of the burner main body 3 through the vent hole 21 of the fuel deflection plate 11. The inner peripheral wall 3a is rapidly cooled by heat transfer by the impinging jet, and further from the slit 19 between the outer peripheral portion of the fuel deflection plate 11 and the inner peripheral wall 3a along the inner peripheral wall 3a. Since the gas flows to the opening side of the burner main body 3, the front end portion of the frame plate 2 of the burner main body 3 is cooled well by the flowing mixed gas, and by the reflected heat or radiant heat from the heated material heated by the burner 10, The front end of the frame plate 2 of the burner body 3 is overheated to be deformed and cracked, or the mixed gas flowing in the opening side of the burner body 3 is prevented from becoming hot and causing reverse ignition, Ba It can be normally combustion actuating the Na 10 in front of the combustion plate 5.
[0017]
Moreover, the frame plate 2 of the burner main body 3 can be cooled by flowing the mixed gas for combustion of the burner 10 toward the inner peripheral wall surface 3a of the burner main body 3 by the fuel deflector plate 11. As described above, the piping structure and equipment for supplying cooling water and cooling air to the outer periphery of the end portion of the frame plate 2 of the burner body 3 are not required, and the structure is simple, can be manufactured at low cost, and can be easily maintained. Can be realized.
[0018]
In the burner 10, the size of the heating area is determined by the size of the opening of the burner body 3, but when the heating area needs to be further increased, for example, the burner body 3 in the burner 10. The front and rear side plates 2c and 2d are omitted as one unit unit, a plurality of unit units are arranged in series in the longitudinal direction, and the connecting plates 12 and 12 of the burner body 3 of adjacent unit units are connected to each other. The nuts are screwed and connected to the bolts passed through the bolt holes 12a, 12a provided in them. Thereby, the burner can expand a heating area in the length direction. In this case, of course, side units 2c and 2d before and after the frame plate 2 of the burner body 3 are provided in the unit unit located on the outermost side.
[0019]
Next, FIG. 4 shows a burner 10A according to a second embodiment of the present invention.
In the burner 10A according to this embodiment, the peripheral plate 11b of the fuel deflecting plate 11 in the burner 10 according to the above embodiment is omitted, and the outer peripheral portion of the deflecting plate member 11a is appropriately arranged along the outer peripheral portion. A fuel deflecting plate 11A having a configuration in which it is supported on the inner end wall surface 1a of the main plate 1 of the burner body 3 by a plurality of support pieces 11c arranged at intervals. Since other configurations are the same as those of the burner 10 according to the above-described embodiment, the same portions are denoted by the same reference numerals, and description of the configurations is omitted.
Also in the burner 10A according to this embodiment, similarly to the burner 10 according to the embodiment, the frame plate 2 of the burner body 3 can be effectively cooled with the mixed gas flowing through the slit 19 at a high flow rate. Therefore, deformation of the front end portion of the frame plate 2, cracks and reverse ignition to the inside of the burner body 3 can be prevented, and the structure of the fuel deflection plate 11A is simple, so that it can be manufactured at a lower cost and maintenance is easier. A burner can be realized.
In the burner 10A according to this embodiment, to secure the surrounding plate 11f on the main plate 1 along the entire outer peripheral portion of the deflector member 11a, the lower end and the deflector member 11a of the peripheral plate 11f When the slit 21a is provided between the upper surface and the upper surface, the mixed gas fed into the fuel introduction space 20 is jetted into the inner peripheral wall 3a of the burner body 3 through the slit 21a. And the same operational effects as those of the burner 10 according to the first embodiment can be obtained.
[0020]
FIG. 5 shows a burner 10B according to a third embodiment of the present invention.
In the burner 10B according to this embodiment, in the burner 10 according to the above-described embodiment, the fuel deflection plate 11 has a configuration in which the peripheral plate 11b is provided above the deflection plate member 11a. , fuel deflector 11B has a configuration wherein it is provided to extend toward the periphery plate 11d below the deflector member 11a to the open end of the burner body 3. And the front end side of the frame plate 2 of the burner body 3 is bent toward the inner space 7 side of the burner body 3 before reaching the opening end, and the bent portion 2e is joined to the outer surface of the peripheral plate 11d. A rectangular annular space (fuel circulation space) 22 is formed between the peripheral plate 11d and the frame plate 2, and the deflecting plate member 11a and the deflecting plate member 11a are formed by a vent hole 21 formed in the peripheral plate 11d. It communicates with the space between the current plate 6. The front end portion side of the peripheral plate 11d also serves as the front end portion of the frame plate 2 of the burner body 3, and the combustion plate 5 is fixed to the front end portion of the peripheral plate 11d. Further, the deflecting plate member 11a of this example is supported on the main plate 1 of the burner body 3 by the support piece 11c similarly to the deflecting plate member 11a of the burner 10A according to the second embodiment.
[0021]
Since other configurations are the same as those of the burner 10 according to the above-described embodiment, the same components are denoted by the same reference numerals, and description of the configurations is omitted.
Also in the burner 10B according to this embodiment, the mixed gas sent into the burner body 3 from the fuel supply pipe 4 and sent to the inner peripheral wall 3a side of the burner body 3 by the deflection plate member 11a of the fuel deflection plate 11B. As a result of flowing through the annular space 22, the frame plate 2 of the burner body 3 can be efficiently cooled, and the same operations and effects as the burners 10 and 10A according to the above-described embodiments are exhibited.
[0022]
In the burners 10, 10A and 10B according to the respective embodiments, the combustion plate 5 is formed in a planar shape in the cross-sectional structures shown in FIGS. 2, 4, and 5, and the burner main body is accordingly formed. 3 is formed in a box shape having a rectangular internal space 7, but the cross-sectional shape of the burner body 3 is not limited to this, and the combustion plate is formed in an arc shape or other shapes, and according to this You may form in the box shape which has the space of circular arc shape and another shape as a whole. If it does in this way, even if it is a member which has the surface of a circular arc and other shapes, the outer peripheral surface of the roller which conveys a steel plate etc. can be preheated, those surfaces can be heated effectively.
The burners 10, 10A, 10B according to the above embodiments are examples in the case where the present invention is applied to a premixed burner, but the present invention is not limited to this, and is applied to a non-premixed burner. You can also
[0023]
【The invention's effect】
As described above, according to the present invention, the following excellent effects can be obtained.
According to the burner according to claim 1 , the fuel supply pipe is connected to the fuel introduction space formed by the deflection plate member, the peripheral plate disposed along the outer peripheral portion thereof, and the inner end wall surface of the closed end portion of the burner body. Since the fed gaseous fuel can be injected at a high flow rate from the slit along the entire circumference between the lower end of the peripheral plate and the upper surface of the deflecting plate member toward the inner peripheral wall of the burner body. , While cooling the frame plate rapidly by increasing the cooling effect by the gaseous fuel by the impinging jet, it can flow to the opening side along the inner peripheral wall of the burner body and cool the opening side well, Due to reflected heat or radiant heat from the material to be heated heated by the burner, the opening end side of the burner body is heated to a high temperature and deformed or cracked, or the gaseous fuel in the burner body becomes hot and reverse ignition occurs. effectively the It is possible to stop. In addition, since a rectifying plate having a plurality of air holes is provided between the deflection plate member and the combustion plate in the burner body, the gas that flows along the frame plate of the burner body and works to cool the frame plate The fuel can be spread over the entire opening of the burner and evenly injected from the entire combustion plate.
In addition, a structure and equipment for supplying cooling water and cooling air to the outer periphery of the opening end of the burner main body are not required, and the structure is simple, can be manufactured at low cost, and a burner that is easy to maintain can be realized. .
[0025]
According to the burner according to the second aspect , since the fuel circulation space is formed toward the opening side of the burner by the peripheral plate over the entire inner circumference of the burner body, the gas fuel flowing through the fuel circulation space The frame plate can be efficiently cooled. Further, a rectifying plate having a plurality of vent holes is provided between the deflection plate member and the combustion plate in the burner body, and the fuel circulation space is provided in the space between the deflection plate member and the rectification plate. Since the air holes communicate with each other, the gaseous fuel that flows along the frame plate of the burner main body and cools the frame plate and flows into the space between the deflecting plate member and the rectifying plate is allowed to flow through the opening of the burner. It can be spread over the entire surface and evenly injected from the entire combustion plate.
[0027]
According to the burner according to the third aspect , since the heat insulating material is attached to the outer periphery of the burner body, high heat is not dissipated from the burner body to the surroundings, which is safe and enhances the combustion efficiency of the burner. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view showing a burner according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II in FIG. 1;
FIG. 3 is a view taken in the direction of arrow B in FIG. 2;
FIG. 4 is a cross-sectional view showing a burner according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a burner according to a third embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a conventional burner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main plate 2 Frame plate 3 Burner main body 4 Fuel supply pipe 5 Combustion plate 6 Rectification plate 7 Internal space 9, 10, 10A, 10B Burner 11, 11A, 11B Fuel deflection plate 11a Deflection plate members 11b, 11d, 11f Perimeter plate 14, 16 Heat insulating material 19, 21a Slit 21 Vent hole 22 Annular space

Claims (3)

A box-shaped burner body having one end closed and the other end opened, and a fuel supply pipe for introducing gaseous fuel into the closed end, and an open end of the burner body A burner comprising a combustion plate and a fuel deflecting plate facing the inlet portion of the fuel supply pipe to the burner body and provided inside the burner body with a predetermined interval between the inner end wall surface of the burner body In
The fuel deflection plate extends along substantially the entire inner wall surface of the burner body along the inner wall surface of the closed end portion of the burner body, and the outer circumferential portion is between the inner circumferential wall of the burner body and the inner circumferential wall. A deflector plate member supported by the burner body by forming an annular slit along the entire periphery and communicating with the fuel supply pipe and the opening side of the burner body, and along the entire circumference of the outer periphery of the deflector plate member And a peripheral plate fixed to the inner end wall surface of the burner body by providing a slit between the lower end and the upper surface of the deflector plate member, and the fuel supply pipe between the inner end wall surface of the burner body A communicating fuel introduction space is formed, and a rectifying plate having a plurality of ventilation holes is provided between the deflection plate member and the combustion plate at a predetermined interval and supported by the burner body. burner, characterized by that. A box-shaped burner body having one end closed and the other end opened, and a fuel supply pipe for introducing gaseous fuel into the closed end, and an open end of the burner body A burner comprising a combustion plate and a fuel deflecting plate facing the inlet portion of the fuel supply pipe to the burner body and provided inside the burner body with a predetermined interval between the inner end wall surface of the burner body In
The fuel deflection plate extends along substantially the entire inner wall surface of the burner body along the inner wall surface of the closed end portion of the burner body, and the outer circumferential portion is between the inner circumferential wall of the burner body and the inner circumferential wall. A deflection plate member supported by the burner body by forming an annular slit along the entire periphery and communicating with the fuel supply pipe and the opening side of the burner body, and disposed along the outer periphery of the deflection plate member It is provided extending to the open end of the burner body toward the lower side of the deflecting plate member, and joined to the bent portion of the frame plate that is bent inward before the open end of the burner body. A peripheral plate that forms an annular fuel flow space in communication with the slit between the inner peripheral wall of the burner body, and the combustion plate is fixed to the tip of the peripheral plate, and the deflection plate member And a predetermined interval between them and the combustion plate A rectifying plate having a plurality of vent holes is provided to be supported by the burner body, and the fuel circulation space is provided between the deflecting plate member and the rectifying plate by a plurality of vent holes provided over the entire circumference of the peripheral plate. A burner characterized by being connected to space . The outer periphery of the burner body, the burner according to claim 1 or 2, characterized in that the heat insulating material is mounted.

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