JPS6233211A - Cooling device for infrared ray burner - Google Patents

Abstract

PURPOSE:To realize efficient cooling of a burner and prevent the front surface of the burner from being exposed to a surplus heat after extinction by a method wherein when the infrared ray burner extinguishes its flame, a suction device for sucking surrounding air through a combustion chamber of the burner is installed. CONSTITUTION:Infrared ray burners 2 and 2 provided with a cooling device 1 are arranged at both sides with a dried-product passage 3 being held therebetween, and a dryer device 4 is constituted by a pair of infrared ray burners 2 and 2 and a moving device. The infrared ray burners 2 are formed by thin-walled steel plate, and a combustion plate 11 made of porous ceramic material is arranged at the front surface of the burner main body provided with a horizontally elongated combustion chamber 10 extending along the passage 3. An air passage 36 made of a steel pipe of rectangular section is installed at an outer circumference of the burner main body. Supplying of mixed gas stops and the burner 2 extinguishes the flame, when at the same time either a hot combustion gas or air within the combustion chamber 10 is discharged by an air-supplying hose 65. The cooling is continued to be supplied to the air passage 36 through air hose 62. In this way, since an air flow of a direction opposite to that found in case of combustion is generated in the combustion chamber, the dried product is not influenced by a surplus heat of the burner 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device for immediately cooling an extinguished infrared burner.

(Prior Art) There is an infrared burner that is constructed by providing a combustion plate on the front side of a burner body having a combustion chamber, and heating a space on the front side by red-hot radiant heat from the plate.

(Problems to be Solved by the Invention) A drying apparatus using an infrared burner as described above is configured to dry an object such as paper or cloth while guiding it into a space on the front side of the burner and passing it through. However, with this type of drying equipment, when normal rotation is stopped, the material to be dried located in front of the infrared burner is affected by the residual heat of the infrared burner, especially if the material to be dried is paper, cloth, etc. In this case, there was a problem that it could burn or get scorched.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration. That is, the infrared burner cooling device according to the present invention is characterized by being provided with an air intake device that sucks outside air through the combustion chamber of the burner when the infrared burner is extinguished.

(Function) When the intake device performs suction, the hot air inside the combustion chamber is sucked and discharged to the outside. In addition, the air flow generated at this time removes heat, so that the infrared burner is rapidly cooled.

(Embodiment) FIG. 1 is a block diagram of one embodiment of a cooling device according to the present invention. Infrared burners 2, 2 equipped with this cooling device 1 are installed on both sides of the drying material passage 3, and the drying device 4 is operated by these pair of infrared burners 2, 2 and a moving device (not shown). It consists of The intake device 6 of this cooling device 1 serves as both a blower for supplying combustion air and a blower for pressurizing cooling air.

The infrared burner 2 is formed from a thin steel plate.

A combustion plate 11 made of a porous ceramic material is provided on the front side of the burner body 2d, which has a horizontally long combustion chamber 10 along the passage 3. At the rear of the combustion chamber 10 is provided a mixed gas chamber 14 which is attached to the eight body 2a by a threaded post 20. A flow guide plate 13 having an arcuate cross section is installed between the combustion chamber IO and the mixed gas chamber 14.

The combustion chamber 10 is provided with nozzles 15 at predetermined intervals along its longitudinal direction. In addition, the combustion chamber 10
Inside, a right hole plate 17 that partitions the combustion chamber into two front and rear chambers 10a and IOb, and a baffle plate 18 surrounding the nozzle 15 are provided.

The nozzle 15 is inserted into a threaded post 20 fixed to the combustion chamber 10 and the mixed gas chamber 14 from the combustion chamber side! 'ff is attached, and the rear end opening of the hollow part 21 is connected to the mixed gas chamber 1.
It opens at 4. There are a plurality of orifices 2 at the tip of the nozzle 15 that communicate with the combustion chamber 10? , 27,... are drilled radially. On the other hand, the needle valve 24 is screwed onto a threaded post 23 fixed to the mixed gas chamber 14, and its tip 24a formed in a conical shape is inserted into the opening of the hollow part 21 of the nozzle 15. has been done. The needle 24 valve can be moved back and forth by engaging a screwdriver or the like with an engagement groove 29 formed on the rear end surface and turning it. When the needle valve 24 moves forward, the gap 3 between the hollow part 21 of the nozzle 15 and the tip 24a of the needle valve 24
0 becomes narrower, and the amount of mixed gas supplied from the mixed gas chamber 14 to the combustion chamber 10 decreases.

Conversely, when the needle valve 24 is moved backward, the gap 30 widens and the amount of mixed gas supplied increases. 33 in Figure 0 is a cap nut that serves both to protect and seal the needle valve.

Furthermore, this infrared burner 2 has an air passage 36 made of a square steel pipe 35 with a rectangular cross section on the outer periphery of the burner body 2a.
is provided. The square steel pipe 35 has an outwardly bent front edge 37a of a steel plate 37 constituting the burner body 2a.
The burner body 2a is supported at a distance 39 between the burner body 2a and a mounting plate 38 fixed at a proper position on both ends of the bottom surface of the steel plate 37. Guide plates 40 and 41 are attached to both the front and rear surfaces of the square steel pipe 35, respectively.

The front guide plate 40 is provided with a gap 44 between the front edge 37a of the steel pipe and the steel pipe 35 by a spacer 43, and its outer edge 40a extends along the outer surface of the steel pipe 35. It is bent downward. The inner edge portion 40b of the guide plate 4o is a plate holding portion with a hook-shaped cross section, and the portion adjacent thereto is a folded portion 40c that projects rearward.
It becomes. The combustion plate 11 is held by the plate holding portion 40b and the front surface of the burner body 2a. The guide plate 41 on the back side is provided in close contact with the back side of the steel pipe 35, extends inwardly along the back side of the burner body 2a, and its inner edge 41a is connected to the mixed gas chamber 1.
It is bent backwards on the side of 4. The gap 38 between the burner body 2a and the steel pipe 35 and the gap 45 between the burner body 2a and the guide plate 41 constitute an air outflow path 46. The steel pipe 35 has a through hole 48 communicating with the outflow passage 46,
49. are arranged alternately in the front and back in a staggered manner. The steel pipe 35 also has a similar through hole 50 that communicates with the spacer 44 .
...is provided.

The blower 6, which is the intake device of the cooling device 1, has a combustion air hose 61 connected to the mixed gas mixer 6° at one ventilation port (discharge port) 8a, and an air supply port 3fla of the air passage 38 of the infrared burner 2. A cooling air hose 62 connected to the outside is connected to a blowing ventilation boss 63 that communicates with the outside, and the other ventilation port (intake port) 8b is connected to an air supply port 64 provided on the back side of the combustion chamber 10 of the infrared burner 2. A suction hose 65 connected to the suction hose 65 and a suction hose 86 leading to the outside are connected. Further, a fuel gas hose 68 in which a solenoid pulp sv is interposed is connected to the mixed gas mixer 60, and the fuel gas sent through the fuel gas hose 68 and the air sent through the combustion air hose B1 are connected to the mixer 60. The mixture is mixed with the gas supply port 8 through the mixed gas hose 69.
The mixed gas chamber 14 is configured to be supplied from the gas mixture 9a. Each of the above hoses is provided with a valve that can be opened and closed, and hose 81.83.85.6Ei.

H(7)/<Jl/buV1, V2, V3, V4
, V5 are linked to each other, and can be switched and weighed all at once by a switching motor 71. The mutual relationship among these valves is as shown in FIG.

While the drying device 4 is in operation, a moving device (not shown) operates,
The material to be dried moves in a predetermined direction along the path 3. At this time, the combustion chamber 10 is connected to the mixed gas chamber 14 from the nozzle 15.
This mixed gas passes from the front chamber 10a of the combustion chamber 10 through the pores of the combustion plate 11 to reach the surface of the plate, where it burns and burns the combustion plate 11. Make it red hot. Red-hot combustion plate 1
The material to be dried is dried by the radiant heat of step 1. Since the perforated plate 17 and the baffle plate 18 are provided, the mixed gas in the combustion chamber becomes a combustion spray)
It spreads evenly over the entire back surface of the 11, resulting in effective combustion.

The cooling air sent into the air passage 36 from the air supply port 36a is ejected from the through holes 48, 49 and the through hole 50.The air ejected from the air holes 48, 49 is discharged to the outside through the air outlet passage 4G. leak. At this time, the side surface and back surface of the burner body 2a and the side surface of the mixed gas chamber 14 are cooled. The front side of the burner body 2a is the hottest part, and since air is directly blown from the through hole 48 to this part, the cooling effect is particularly remarkable. In addition, the through hole 50
The air blown out from the guide plate 4o cools the guide plate 4o when passing through the gap portion 44.

When the drying device 4 is stopped, the movement of the material to be dried is stopped, and the solenoid valve S is switched to the closed side to stop the supply of fuel gas. At the same time, the switching motor 71 starts to switch each valve V1.

V2, V3, V4, and V5 are switched in the opposite direction. That is, at the same time that the supply of the mixed gas is stopped and the burner 2 is extinguished, the high temperature combustion gas or air in the combustion chamber 10 is discharged through the air supply hose 65. Note that the cooling air continues to be supplied to the air passage 36 through the air hose 62. Instead of the air discharged from the combustion chamber 10, outside air on the passage 3 side is drawn into the combustion chamber 10 through the pores of the combustion plate 11. In this way, air flows in the opposite direction to that during combustion, so the combustion chamber 1
The hot air inside 0 will not leak to the passage 3 side, and the material to be dried will be transferred to burner 2.
It is not affected by hot air due to residual heat. Moreover, the burner 2 is rapidly cooled by this air flow and the cooling air in the air passage 36. Therefore, even if the material to be dried, such as paper or cloth, is left in the passage 3 after extinguishing the infrared burner 2, the material to be dried will not be burned or scorched.

Cooling air in the air passage 36 is taken in from the intake air hose 66 while the burner is burning, and after the fire is extinguished, the air sucked in by the aforementioned suction hose 65 is circulated. When the infrared burner 2 is sufficiently cooled, this cooling air is
All you have to do is make it appear.

Note that the intake blower for cooling may be provided independently as a cooling device.

(Effects) As is clear from the above description, the infrared burner cooling device according to the present invention is configured to suck outside air through the combustion chamber of the burner with the intake device after extinguishing the fire.
The burner is effectively cooled and the front part of the burner is not exposed to residual heat after extinguishing.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of one embodiment of a cooling device according to the present invention,
and FIG. 2 is a sectional view of the infrared burner.゛ l...Cooling device 2...Infrared burner 2a.
...Burner body 4...Drying device 6...Intake device 10...Combustion chamber 11...Combustion plate

Claims (1)

[Claims] (1) An infrared burner cooling device comprising a combustion plate provided on the front side of a burner body equipped with a combustion chamber, and configured to heat a space on the front side by red-hot radiant heat from the plate, which extinguishes the infrared burner. A cooling device for an infrared burner, characterized in that the cooling device is sometimes provided with an intake device that sucks outside air through the combustion chamber of the burner.