JPH06264323A - Device for protecting fire in yarn fluff burning machine - Google Patents

Abstract

PURPOSE:To extremely reduce a fraction defective of product caused by burning unevenness, etc., by sending a controlled air flow to the circumference of a burning flame to form a flame-protecting wall, preventing shaking of flame by external turbulence. CONSTITUTION:In burning fluffs of yarn, when yarn 1 is traveled right above a combustion flame 2 of a gas burner 3 fitted to the tip of a gas tube 9 to which a fuel gas for combustion is supplied, compressed air is jetted from an adjusted air flow blow-off nozzle 5 of a double cylindrical pipe arranged to surround the circumference of the gas burner 3 and an air curtain is formed around the combustion flame 2 of the gas burner 3 by a jetted air flow A. Further, the jetted air flow A is discharged through a chimney-like controlled air flow hood stood at an interval so as to cover the top of the blow-off nozzle 5 and not to hinder traveling of the yarn 1 to prevent shaking of the combustion flame 2 by turbulence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn fluffing machine using a flame of fuel combustion as a heat source, and a device for protecting the flame. More specifically, the present invention relates to a fluffing machine which requires a weak flame. The present invention relates to a device which eliminates the problems of flame disturbance and uneven baking caused by extinguishing a fire.

[0002]

2. Description of the Related Art Conventionally, in a thermal processing machine such as a fluff burner which uses a flame of a fuel combustion as a heat source, if the heat capacity of the flame is too high, the product is adversely affected. In such a case, it is convenient to use electric heat, whose heat capacity can be easily adjusted, but there is a drawback that an enormous amount of electric power is required to secure the necessary heat capacity by electric heat and the cost becomes high. Therefore, an inexpensive combustion fuel such as gas is used to weaken the heat power to obtain a predetermined heat capacity.

The above prior art will be described more specifically with reference to FIG. 3. As shown in the figure, the yarn (1) to be treated is a flame (2) of the combustion fuel gas emitted from the gas burner (3).
Although it is passed through the top and subjected to thermal processing such as fluffing, in such a case, the passing speed of the yarn on the flame may not be increased due to the limit of yarn strength and the like. In such a case, if the heating power is constant, if the yarn speed is slow, the amount of heat applied to the yarn becomes high and the yarn is deteriorated. Therefore, the flame of the gas burner is weakened and the heat power is reduced to an appropriate amount of heat for thermal processing.

[0004]

However, a weak flame with a weakened thermal power is easily affected by turbulence, and even if a slight turbulence of the air flow causes the flame to shake or disappear, the risk of uneven firing on the yarn increases. To do. In addition to the above-mentioned quality problem, there are various environmental problems described below. That is, if the capacity of the air conditioning equipment for ventilation of the surrounding air is increased in order to maintain the work environment, turbulence will be generated and the flame will be easily disturbed, which makes it impossible to fully utilize the ventilation capacity.

Further, when the fluff of the yarn is burned, the lees are naturally generated. However, even if an attempt is made to attach a lees recovery device by suction or blowing, the turbulence generated by the device will disturb the flame and the lees cannot be installed. There is also a problem that the collection effect has to be deteriorated because the collection of the lees must be carefully performed manually.

Further, due to the characteristic that weak flames with reduced fire power are easily affected by turbulent air flow, the flames are disturbed by work factors such as opening and closing of doors and movement of people, increasing the product defect rate due to uneven baking. ing.

The object of the present invention is to protect flames that are easily affected by turbulence, thereby reducing the product defect rate due to uneven baking, and improving the air conditioning capacity that was limited by weak flames. It is intended to improve the environment.

[0008]

In order to solve the above problems, the device of the present invention has the following configuration. That is, in a yarn fluffing machine that uses a flame of fuel combustion as a heat source, a flame protection wall is formed around the flame by a regulated air flow, and the influence of turbulent air flow is cut off.

[0009]

According to the flame protection device of the present invention, a regulated air flow is jetted so as to surround the flame for yarn processing, thereby forming an air curtain-shaped protection zone. Even if the surrounding atmosphere slightly fluctuates, the adjusted jet airflow serves as a protective wall and does not affect the weak flame by turbulent airflow, unless direct injection into the protective zone is performed.

[0010]

EXAMPLES The present invention will be described in detail with reference to the examples shown in FIGS. 1 and 2. In the following embodiments, the same components as those of the prior art will be designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIG. 2, the apparatus of the embodiment comprises a gas burner portion (4) including a gas burner (3) for injecting a flame of fuel combustion, and an adjusted air flow including an adjusted air flow blowing nozzle (5). It is composed of three parts: an injection part (6) and an exhaust part (8) including an adjustment air flow hood (7).

Like the conventional mechanism, the gas burner portion (4) is a gas burner (3) in which a combustion flame (2) is positioned immediately below the traveling yarn (1), and for burning the gas burner (3). It is composed of a gas pipe (9) for supplying the above gas.

As shown in FIG. 1, the adjusted air flow injection part (6) has a double cylindrical adjusted air flow blowing nozzle (5) installed so as to surround the gas burner (3) as the core of the structure. The nozzle (5) is configured to inject compressed air upward in a cylindrical shape from between an outer cylinder and an inner cylinder installed concentrically, and is attached via a packing (10) as shown in the figure. It is locked to the plate (11). A pipe joint (12) is provided at the lower part of the adjusting air flow blowing nozzle (5) of the mounting plate (11).
Is screwed to the mounting plate (11), and the air tube (13) is joined to the pipe joint (12). Further, the pipe joints (12) are arranged at several places below the adjusted air flow blowing nozzle (5), and the air tubes (13) joined to the respective pipe joints (12) are manifolds (14) (shown in FIG. 2).
To pressure gauge (15) and pressure regulating valve (16)
Via an air compressor (not shown).

The compressed air sent from the air compressor (not shown) is depressurized to an appropriate pressure by the pressure adjusting valve (16) and sent to the adjusting air flow blowing nozzle (5), as shown in FIG. By narrowing the tip of the adjusted airflow blowing nozzle (5) and surrounding the periphery of the gas burner (3) as described above, an air curtain, that is, a wall is formed around the gas burner (3) by the adjusted airflow. There is.

Next, the structure of the exhaust unit (8) will be described. Since there is a limit to the effective distance of the adjusted air flow due to the blowing, as shown in Fig. 2, an interval is set so as to cover the upper part of the adjusted air flow nozzle (5) and not to hinder the passage of the yarn (1). A chimney-shaped adjusted air flow hood (7) is erected. The adjusting airflow hood (7) is vertically hung by a variable mounting arm (19) from a position in the vicinity of the ventilation opening (18) of the exhaust air conditioning duct (17), and the upper end of the adjusting airflow hood (7) is a ventilation opening. It is at the lower part with a little space from (18), and its gap can be freely adjusted by changing the length of the mounting arm (19).

The apparatus of the embodiment has the above-mentioned structure, and its operating state will be described below. In the fluffing machine under continuous operation, as shown in FIG. 1, the yarn (1) to be treated runs on the flame (2) of the fuel gas emitted from the gas burner (3), and the fluffing is done. Done. At that time, in the apparatus of the embodiment, as described above, the compressed air whose pressure has been reduced to the proper pressure by the valve (16) (shown in FIG. 1) is sent to the adjusted air flow blowing nozzle (5), and the burner (3) The air flow is injected so as to surround the circumference of the flame and forms a protective wall by the air flow outside the area of the flame (2).

In the above process, the posture of the flame (2) is a balance between the blowout airflow (A) injected from the blowout nozzle (5), the heat rising airflow (B) itself, and the hood negative pressure (C). However, if the airflow from the adjusting airflow nozzle (5) is too strong, the airflow (A) entrains the flame (2), and if the hood negative pressure (C) is too strong, the gas burner (3) It will be in an oxygen-deficient state and will extinguish the fire, so it is necessary to adjust according to the heating power. In practice, the blowout pressure and hood negative pressure are determined by experimental values. In this way, the blowing airflow (A) blocks the turbulent airflow outside the region, and unless the extreme air pressure is applied to the blowing airflow (A), the weak flame (2) is always stable without being disturbed.

The blowout pressure is adjusted by the pressure adjusting valve (16) and the pressure gauge (15), the hood negative pressure is adjusted by adjusting the length of the mounting arm (19), and the tip of the adjusting airflow hood (7) and the ventilation are adjusted. This is done by adjusting the spacing between the mouths (18).
In addition, the outlet of the adjusting airflow nozzle (5) is narrowed,
By making the adjustment air flow hood (7) longer, the area of the blowout air flow can be made longer.

[0019]

As shown in the above embodiment, since the flame protection device of the present invention is based on the adjusted air flow, it does not have the protection ability to stop the direct exposure of the compressed air, but it does Even if it is jetted, it does not affect the flame unless it directly hits the adjusted air stream. Therefore, in addition to being able to fully utilize the ventilation capacity of the air conditioning equipment that could not be raised in order to prevent the shaking of the flame, suction power etc. for the waste cake collection work that relied on careful manual work to prevent the flame from shaking. Automation is also possible, which greatly improves the environment in which you had to work in the dust. Further, in the conventional technology, the flame sways due to the opening and closing of the door and the sudden movement of a person, and the product defect rate due to the uneven burning factor is high. Since the product does not shake, the product defect rate due to uneven baking factors is greatly reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of an apparatus according to an embodiment.

FIG. 2 is a partially cutaway perspective view showing the entire apparatus.

FIG. 3 is a perspective view showing a main part of a conventional yarn fluffing machine.

[Explanation of symbols]

 1 Thread 2 Flame 3 Gas burner 5 Adjusted airflow nozzle 7 Adjusted airflow hood 13 Air tube A Airflow B Heat rising airflow C Hood negative pressure

Claims (1)

[Claims] 1. A yarn fluffing machine using a fuel combustion flame as a heat source, characterized in that a flame protection wall is formed around the flame by a regulated air flow to block the influence of turbulence. Flame protector for yarn fluffing machine.