JPH073265Y2 - Far infrared heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a far infrared heating device using a pipe type far infrared heater.

In some cases, the term "heater" is simply used in the following description, which means "pipe type far infrared heater".

[Conventional technology]

For example, wide fibers that have been treated with a chemical solution are heated and dried, and a wide plastic film may have its strength increased by being heat-shrinked during molding. When heating such a wide object to be heated, a far infrared heating device using a pipe type far infrared heater may be used.

In the conventional far infrared heating device used for such an application, a pipe type far infrared heater is arranged inside the heating furnace in a direction orthogonal to the moving direction of the object to be heated, and both ends of the heating device It is of a retained structure.

Since this pipe type far infrared heater is long and expands and contracts due to heat, one of its holding parts must be held slidably so that it can respond to expansion and contraction. If the structure holds both ends of the infrared heater, maintenance such as replacement and repair will be very troublesome.

[Problems to be solved by the device]

The present invention is a far-infrared heating device using a pipe-type far-infrared heater, which facilitates maintenance such as replacement and repair of the pipe-type far-infrared heater, and widens wide heated objects such as fibers and films. It is an object of the present invention to uniformly and efficiently heat without causing uneven drying along the direction.

[Means for Solving the Problems]

The means adopted by the present invention to solve the above-mentioned problem is that the heating furnace is divided into upper and lower parts, and a pipe-type far-infrared heater is provided in each of the divided heating furnaces in a cantilever manner substantially orthogonal to the moving direction of the object to be heated. That is, the holding bar for holding the pipe type far infrared heater from below is inclined with respect to the pipe type far infrared heater.

[Function of device]

The pipe type far-infrared heater is attached to the split heating furnace in a cantilevered manner, and since one end is held freely, it is possible to freely respond to expansion and contraction due to heat, and replace the heater, Since the repair can be performed from the outside of the heating furnace, the maintenance becomes easy.

Further, the far infrared rays emitted from the upper pipe type far infrared heater is blocked by the holding bar which holds the lower side of the heater, but since the holding bar is arranged to be inclined with respect to the heater. The irradiation opportunities of far-infrared rays with respect to a wide object to be heated that passes through the heating chamber are substantially uniform along the width direction. Therefore, since the wide object to be heated is heated substantially uniformly over the entire width thereof, unevenness in drying does not occur.

Further, since the heating furnace is divided into upper and lower halves, and a set of divided heating furnaces are close to each other or separated from each other, in the event of an emergency, the upper and lower halves that are adjacent to each other are separated. By separating the heating furnace, the heating chamber is in an open state, and the temperature can be rapidly lowered, and since the heating furnace is divided into two parts in this way, the structure is separated from each other. Maintenance of the heating furnace becomes easy.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

1 to 3, the heating furnace 1 is composed of a pair of split heating furnaces 1a and 1b which are vertically divided into two parts. The upper split heating furnace 1a is fixed to a plurality of columns 2. The lower split heating furnace 1b, which is installed as a hearth and is a hearth, is held by the lifter device L and is vertically moved by a predetermined amount (10 to 50 mm). That is, the lifter device L
Is configured such that each connecting portion of the pair of links 3 is connected by a connecting rod 4, and the connecting rod 4 is vertically moved by a cylinder device 5 by a predetermined amount (10 to 50 mm).
A lower split heating furnace 1b is attached to the upper ends of the pair of links 3.

The heating furnace 1 is provided with an inlet portion 6 and an outlet portion 7 for the object to be heated A, and the size of each opening can be adjusted by a slide type slit 8.

Each of the upper and lower split heating furnaces 1a and 1b constituting the heating furnace 1 is equipped with a large number of pipe type far infrared heaters 9, and the pipe type far infrared heaters 9 are heating chambers.
It is arranged in 10.

The pipe-type far-infrared heater 9 is a heater having a structure in which far-infrared rays are radiated by being electrically heated, and the moving direction of the heated object A is set at a predetermined pitch along the moving direction of the heated object A. It is attached in a cantilever manner along a direction (widthwise direction of the object to be heated A) orthogonal to. That is, the heater 9
The end on the terminal side of the side wall 1 on one side of each split heating furnace 1a, 1b
It is fixed to 1 and the other end is free inside the heating chamber 10. Therefore, the terminal portion of the heater 9 is isolated and protected from the heating chamber 10.

Further, the pipe-type far-infrared heater 9, which is attached to each of the split heating furnaces 1a and 1b in a cantilever manner, is held from below by a holding bar 12. The holding bar 12 is inclined with respect to the pipe type far infrared heater 9. In this way, the holding bar 12 is inclined with respect to the heater 9 so that the object A to be heated can be uniformly heated along the width direction thereof. If this holding bar 12
When it is made orthogonal to the heater 9, the irradiation amount of far infrared rays to a specific portion along the width direction of the object to be heated A is reduced, uniform heating is not performed, and the holding bar 12 is inclined as described above. This is to prevent this.
Therefore, in the present invention, "arranging the holding bar in a direction inclined with respect to the pipe type far infrared heater" means
It means that at least the holding bar 12 is not arranged along the moving direction of the object to be heated A.

Also, as shown in FIGS. 4 to 6, the holding bar
V-shaped and rectangular groove portions 12a and 12a 'are provided in the portion of 12 which directly holds the pipe type far infrared heater 9. The pipe type far infrared heater 9 has this groove portion 12a.
The free end of the
Does not shift along the direction of movement.

Further, an exhaust duct 13 is attached to the upper split heating furnace 1a so that the exhaust fan 14 exhausts the atmosphere of the heating chamber 10. The lower split heating furnace 1b is provided with a slit 15 for adjusting the temperature of the heating chamber 10. In addition, a stainless steel plate is lined on the inner peripheral surface of the heating furnace 1, which acts as a reflection plate for far infrared rays and prevents the inner peripheral surface of the heating furnace 1 from corroding due to contact with the atmosphere in the furnace. To prevent.

For example, when the material A to be heated is a wide fiber that has been subjected to the chemical treatment, the material A to be heated is heated in a heating chamber in a state in which a proper tension is applied by each device provided before and after the heating device. Far infrared rays radiated from a large number of pipe-type far infrared heaters 9 provided above and below the object A to be heated are moved to the inside of the object 10 and are radiated to the object A to be heated. .

The pipe-type far-infrared heater 9 is cantilevered, and the lower part thereof is held by a holding bar 12. Since the holding bar 12 is inclined with respect to the heater 9, Irradiation opportunities of far infrared rays to the object A to be heated passing through the inside of the chamber 10 become substantially uniform along the width direction. Therefore, the wide object A to be heated is heated substantially uniformly over the entire width thereof, so that no unevenness in drying occurs.

Further, when the object A to be heated is a fiber, a considerable amount of fiber fluff floats inside the heating chamber 10, but the terminal portion of the pipe type far infrared heater 9 is isolated from the heating chamber 10. Therefore, it is possible to prevent leakage caused by fluff attached to the terminal portion.

Further, the pipe type far infrared heater 9 is cantilevered and fixed to each of the split heating furnaces 1a and 1b, and one end thereof is free, so that it can freely respond to expansion and contraction due to heat. No internal stress is generated in the heater 9, and the heater 9 can be replaced or repaired from the outside of the heating furnace 1, which facilitates maintenance.

Further, since the heating furnace 1 is vertically divided into two parts, and the pair of divided heating furnaces 1a and 1b are close to each other or separated from each other, in the event of any emergency, the As shown in the figure, when the lifter device L lowers the lower split heating furnace 1b by a predetermined amount (10 to 50 mm) to separate the upper and lower split heating furnaces 1a and 1b from each other, the heating chamber is released, The temperature can be lowered rapidly. Further, since the upper and lower split heating furnaces 1a and 1b are separated from each other, the heating furnace 1 can be easily maintained.

In the above embodiment, the lower split heating furnace 1b is vertically moved by the lifter device L, but the upper split heating furnace 1a may be vertically moved, or both of them may be vertically moved. It doesn't matter.

[Effect of device]

The far-infrared heating apparatus according to the present invention has a heating furnace divided into upper and lower parts, and a pipe-type far-infrared heater is attached to each of the divided heating furnaces in a cantilever manner substantially orthogonal to the moving direction of the object to be heated. Since the holding bar for holding the pipe type far infrared heater from below is tilted with respect to the pipe type far infrared heater, maintenance such as replacement and repair of the pipe type far infrared heater becomes easy, and the fiber type A wide heated object such as a film can be uniformly and efficiently heated along the width direction so that there is no unevenness in drying, and in an emergency, the upper and lower split heating furnaces can be separated to separate the heating chamber. It is also possible to release the temperature of the heating chamber, thereby rapidly lowering the temperature of the heating chamber.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a far-infrared heating apparatus according to the present invention, FIG. 2 is a front sectional view of the same, and FIG. 3 is a right side view of a partially cutaway view. Is an enlarged view of the X portion in FIG. 1, FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIG. 6 is a sectional view taken along line VV of FIG. 4 in another example. The figure is a partially cutaway front view of the upper and lower split heating furnaces 1a and 1b separated from each other. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Heated object, 1: Heating furnace 1a, 1b: Split heating furnace 9: Pipe type far infrared heater 10: Heating chamber, 12: Holding bar 12a, 12a ': Holding bar groove

Claims (1)

[Scope of utility model registration request] 1. A heating furnace having a structure in which at least one of a pair of split heating furnaces, which are vertically divided into two, moves vertically so that one set of split heating furnaces approaches and separates; A plurality of pipe-type far-infrared heaters arranged inside the furnace; and a plurality of holding bars for holding the pipe-type far-infrared heaters from below; The infrared heater is arranged along a direction substantially orthogonal to the moving direction of the object to be heated, and is attached to each of the divided heating furnaces in a cantilever manner,
The far-infrared heating device, wherein the plurality of holding bars are arranged in a direction inclined with respect to the pipe-type far-infrared heater and hold the pipe-type far-infrared heater from below.