JPS6096884A - Angle variable type air nozzle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air nozzle installed in an oven for heating or drying continuously running sheets such as cloth or plastic films.

Conventional technology In an oven that heats or dries a sheet-like object using hot air, an air nozzle that injects air toward the sheet-like object and extends in the width direction of the sheet-like object is usually installed in the oven. Many are installed. In addition, since the continuously supplied sea material passes through the oven, the inlet and outlet portions thereof are formed as open openings. At this opening, a complicated airflow is generated due to the pressure balance inside and outside the oven, the accompanying airflow of the traveling sheet, and the like. Therefore, depending on the direction of the airflow, hot air leaks from inside the oven and external cold air leaks into the oven, and the hot air and cold air enter and exit the oven, worsening the temperature unevenness inside the oven and causing sheet-like Problems such as non-uniform physical properties of the object, waste of heating energy in the oven, and deterioration of the working environment due to increased temperature of the atmosphere around the oven may occur. This effect becomes greater as the width of the sheet-like material becomes wider, that is, the opening area of the oven is wider, the speed at which the sheet-like material travels is faster, and the difference in static pressure and temperature between the inside and outside of the oven becomes larger.

Conventionally, as a countermeasure for this kind of problem, a deflector nozzle with a deflector attached to the air nozzle's air nozzle to control the direction of the air jetted immediately before the oven entrance and just before the oven exit, or a nozzle with a deflector attached to the air nozzle itself or the air nozzle itself is used. A method has been adopted in which a slanted nozzle is used and air is jetted against the airflow at the opening to block leakage.

However, the flow of air into and out of the oven is not necessarily in a fixed direction; the direction of the airflow differs between the top and bottom and left and right sides of the sheet 1-like object. It usually changes depending on conditions such as the traveling speed of the vehicle. Therefore, in the above method, the direction of the air jet from the nozzle may partially coincide with the direction of the airflow at the oven opening.
q. There is a problem in that hot air leaks from the oven and cold air leaks into the oven.

Purpose of the Invention In order to solve these problems, the present invention jets air from an air nozzle in response to the direction of airflow at the oven opening, which is complicated or changes depending on the conditions, and prevents leakage of hot air and cold air. The purpose of this is to more reliably prevent intrusion.

Structure and operation of the invention A variable angle air nozzle according to the present invention is provided in an oven and injects air toward a sheet-like object passing through the oven. The air nozzle is characterized in that a plurality of injection angle adjustment mechanisms are arranged in the longitudinal direction of the air nozzle and are connected to the air nozzle and can adjust the air injection angle of the air nozzle independently of other longitudinal parts.

In such an air nozzle, the air injection angles of the longitudinal parts of the air nozzle are independently adjusted by the injection angle adjustment mechanism arranged in the longitudinal direction, and the direction of the injection air is adjusted to the direction of the airflow at the oven opening. It is adjusted so that it is in the direction opposite to the airflow in each part according to the distribution of airflow. Therefore, by arranging the air nozzle according to the present invention above and below the sheet material immediately before the oven entrance and immediately before the oven exit, air leakage and infiltration can be prevented from all parts of the sheet material above and below and on the left and right sides of the opening. It becomes possible to shut off the oven appropriately, improving temperature uniformity within the oven, saving energy, and improving the environment.

Embodiments Below, preferred embodiments of the variable angle air nozzle of the present invention will be described with reference to the drawings.

1 to 4 show a variable angle air nozzle according to a first embodiment of the present invention. In the figure, 1 indicates an air nozzle, and the air nozzle 1 is installed in the oven 2 to hold the sheet-like material 3 with its longitudinal direction being the width direction of the sheet-like material 3.
A large number of them are arranged in the longitudinal direction A. Further, as shown in FIG. 2, a large number of air nozzles 1 are arranged above and below the sheet material 3 in the oven 2.

Among these air nozzles 1 arranged in large numbers, the air nozzles 1 arranged above and below the sheet material 3 immediately before the oven outlet 5 and immediately before the oven outlet 5 have a vertical cross-sectional shape as shown in FIG. . That is, the air nozzle 1 includes a chamber 6 into which air sent from a suitable heated air supply device (not shown) flows, and a sheet-like material 3 from the chamber 6.
A tapered portion 7 that extends toward the side and is sandwiched between the inner walls as it goes toward the sheet-like material 3 side, and a parallel nozzle that extends from the tip of the tapered portion 7 toward the sheet-like material 3 side while maintaining a substantially parallel interval by a spacer 8. It consists of part 9,
The tip opening of the parallel nozzle portion 9 serves as an air injection port 10. The air nozzle 1 disposed at the oven port 4 and the oven outlet 5 has a thin plate structure, particularly the parallel nozzle portion 9 and the tapered portion 7, which are susceptible to elastic deformation.

At an appropriate interval in the longitudinal direction B of the air nozzle 1,
A plurality of injection angle adjustment mechanisms 11 are provided. The injection angle adjustment mechanism 11 has one end fixed to the outer surface of the chamber 6 of the air nozzle 1 and extends toward the sheet-like object 3 side, and the other end of the bracket 12 is inserted through the bracket 12 and the parallel nozzle part 9 of the air nozzle 1 is inserted. It consists of a threaded rod 13 extending in a direction perpendicular to the outer wall surface and having one end connected to the outer wall surface side of the parallel nozzle part 9. Then, the threaded rod 13 is fixed to the brackets 1 to 12 by tightening the screws 14 and 15 onto both sides of the bracket 12 to the nuts 1 which are screwed onto the threaded rod 13. A support fitting 16 and a pin 17 fixed to the support fitting 16 are provided at one end of the threaded rod 13. The bottle 17 is inserted into a long hole 20 formed in a connecting member 18 attached to the outer wall surface of the parallel nozzle part 9 so as to extend in a direction parallel to the center line 19 of the parallel nozzle part 9. It is inserted in a state where it can move freely and its movement is restricted in the direction orthogonal to it.

In this embodiment, one end of the brackets 1 to 12 is supported by the chamber 6 of the air nozzle 1, but it is supported by another member independent of the air nozzle 1, for example, extending in a direction parallel to the longitudinal direction of the air nozzle 1. May be supported.

The operation of the variable angle air nozzle configured as described above will be described below.

The air injection angle of the air nozzle 1 is determined by the direction of the parallel nozzle section 9, particularly the direction of the air injection port 10. The inclination angle of the parallel nozzle portion 9 is determined by adjusting the position of the threaded rod 13 with respect to the bracket 12. That is, by loosening one of the nuts 14 and 15 and rotating the other, the threaded rod 13 is moved in the axial direction of the screw shaft relative to the bracket 12, and the bottle 1 is accordingly moved.
7 is moved. Since the bottle 17 is restrained in the direction perpendicular to the center line 19 of the parallel nozzle part 9 within the elongated hole 20, the movement of the bottle 17 forces the parallel nozzle part 9 to become elastic via the connecting member 18. transformed. Due to this elastic deformation, the parallel nozzle portion 9 is tilted and its direction is adjusted, thereby adjusting the direction of the air injection port 10. In addition, at the time of this adjustment, since the bottle 17 is slidable in the longitudinal direction of the elongated hole 20, the parallel nozzle part 9 and the connecting member 18 are
, can be tilted easily with respect to the screw stud 13.

Adjustment of the inclination of the parallel nozzle part 9 by adjusting the threaded rod 13 is performed by adjusting the injection angle (independently for each oak 11), and the injection angle adjustment mechanism 11 is adjusted in the longitudinal direction of the air nozzle 1, that is, in the width direction B of the sheet-like material 3. Since the air nozzles 10 are arranged at appropriate intervals, the direction of the air injection ports 10 can be adjusted to have a free angular distribution (for example, a waveform) in the longitudinal direction of the air nozzle 1, as shown in FIG. Therefore, the direction of the air jet ports 10 of the air nozzles 1 disposed above and below immediately after the inlet 4 and above and below immediately before the outlet 5 in the oven 2 is adjusted according to the direction of the air flow at the openings of the inlet 4 and the outlet 5. It becomes possible to adjust the direction to face the .

The airflow flowing through the openings of the inlet 4 and outlet 5 has a complicated distribution in the [1] direction and the upper and lower positions of the sheet-like object 3, and the distribution changes depending on various conditions. By adjusting the direction of the air injection ports 10 of the air nozzles 1 disposed above and below the air nozzles 1 so as to face the airflow in accordance with the distribution of the airflow or its change, the injection angle adjustment mechanisms 11 of the air nozzles 1 are arranged at the openings. The air flow and the air jetted from the air nozzle 1 collide with each other at all positions in the upper and lower and width directions of the sheet-like material 3, and air leakage and infiltration are reliably blocked.

Next, FIGS. 6 and 7 show a variable angle air nozzle according to a second embodiment of the present invention.

In this embodiment, the air nozzle 21 has a structure in which it is divided into an appropriate number of parts in its longitudinal direction. The direction of the air injection port 10 of each divided nozzle 21a can be adjusted independently. That is, a pipe-shaped nozzle part 23 is provided at the end of the parallel nozzle part 22 opposite to the air injection port 10, and the outer peripheral surface of the pipe-shaped nozzle part 23 is supported by support members 24 from both sides. The pipe-shaped nozzle portion 23 can be rotated by loosening the restraint of the support member 24 with a bolt 25, and the inclination angle of the parallel nozzle portion 22 can be adjusted by the rotation. Therefore, the pipe-shaped nozzle portion 23, the support member 24, and the bolt 25 constitute an injection angle adjustment mechanism 26. Air is supplied from the tapered part 27 to the parallel nozzle part 22 through a hole 28 or a slit formed in the pipe-like nozzle part 23. Note that 29 indicates ports 1 to . 29 for fixing the support member 24. 30 is a bracket that supports the bolt 25 and the support member 24, and 31 is a sealing gasket.

In the air 71 nozzle 21 configured in this way, the direction of the air injection port 10 is adjusted for each divided nozzle 21a. By appropriately setting the length of the split nozzle 21a, the air ejected from the air nozzle 21 can be adjusted to face the airflow at the oven population 4 and outlet 5 in accordance with the distribution of the airflow. becomes possible. In this embodiment, since the elastic deformation force of the nozzle as in the first embodiment is not required during adjustment, the air injection angle can be easily adjusted with a smaller force. Other configurations and operations are similar to those of the first embodiment.

In addition, in the first embodiment and the second embodiment, the oven 2
Although the present invention has been applied to the air nozzles at the inlet 4 and outlet 5 of the oven 2, the present invention is not limited thereto, and the mechanism according to the present invention can be similarly applied to each air nozzle in the oven 2.

In other words, since the direction of the air injection port of the air nozzle in the oven 2 can be freely adjusted, the oven 2
It becomes possible to adjust the direction of the airflow within the oven 2 according to the conditions, and it becomes possible to equalize the temperature distribution within the oven 2 and to adjust the optimal treatment for the passing sheet-like object 3. In addition, if the inside of the oven 2 is divided into several zones and the control temperature of each zone is different, by applying the present invention to the air nozzle between each zone, the air between the seams 7 The flow of air is significantly blocked, making it possible to more reliably control the atmosphere within each zone to a desired temperature.

Effect of Light As explained above, when using the variable angle air nozzle of the present invention, the direction of the air injection port can be adjusted independently at each part in the longitudinal direction of the air nozzle. By applying the present invention to the air nozzle, it is possible to inject air in a direction opposite to the direction of airflow at all parts of the oven opening, ensuring that hot air leaks out of the oven and cold air leaks into the oven. This has the effect of being able to block the By shutting off the second oven, it is possible to improve the uniformity of temperature within the oven and reduce heating energy. By the way, as a result of applying the present invention to a hot air heating oven for forming biaxially oriented films, the temperature unevenness inside the oven was reduced by about 1/2.
3, and the consumption of steam, which is an air heating source, decreased by about 5%.

Furthermore, the present invention is applicable not only to the oven inlet and outlet but also to each air nozzle in the oven, and can be used to equalize the temperature distribution in the oven, block air circulation between each zone in the oven, etc. It can also be measured.

[Brief explanation of drawings]

FIG. 1 is a plan view of an oven to which a variable angle air nozzle according to the first embodiment of the present invention is applied, FIG. 2 is a side view of the device shown in FIG. 1, and FIG. 3 is an air nozzle section of the device shown in FIG. 1. FIG. 4 is a plan view of the device shown in FIG. 3, FIG. 5 is a plan view showing one adjustment state of the air nozzle shown in FIG. 3, and FIG. 6 is a plan view of the device shown in FIG. FIG. 7 is a longitudinal sectional view of the variable angle air nozzle; FIG. 7 is a plan view of the device shown in FIG. 6; 1.21 Air nozzle 2 Oven 3 Sheet material 4 Oven inlet 5 Oven outlet '6 ...Chamber 7.27...Taber surface 9.22...Parallel nozzle section Fig. 3 Fig. 4 Fig. 0 Fig. 5 Fig. 6 Fig. 7 Fig. 6

Claims (1)

[Claims] ('I) In an air nozzle that is installed in an oven and injects air toward a sheet material passing through the oven, the air nozzle is connected to a part of the longitudinal direction of the air nozzle. A variable angle air nozzle, characterized in that a plurality of injection angle adjustment mechanisms are arranged in the longitudinal direction of the air nozzle, which are capable of adjusting the air injection angle of the air nozzle independently of other longitudinal parts.