JPS60190529A - Polygonal variable nozzle device - Google Patents

Abstract

PURPOSE:To form static pressure mud which prevents uneven hardening and edge sagging of a belt-like material by providing a moving nozzle part aobve a stationary nozzle part and adjusting the space between the slits thereof in the transverse direction of the material by the advance and retreat of the moving nozzle part. CONSTITUTION:A guide plate 9 is installed to long sides 18, 18' intersecting orthogonally with the sheet passing through direction in the central part of the space of a picture frame-shaped nozzle frame body and two stationary slits 13 parallel with each other are provided orthogonally with the sheet passing through direction to form a stationary nozzle part R. Space parts 14, 14' for allowing passage of gas are provided between sides 19 and 19' in parallel with the sheet passing through direction. A polygonal plate 11 formed to a loop shape having a slope 11' is provided to the plate 9. The plate 11 and a flat plate 10 are combined to form a movable parallel slit 15 and movable side slits 16, 16', thereby constituting a moving nozzle part S. The part S is advanced and retreated by an advancing and retreating device 12 so as to meet the width of a belt-like material and to adjust the space between the slits 16 and 16' to a desired size, by which the static pressure mud having a desired width is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to a strip-shaped material (for example, metal) along the threading line of +1 lug, in a non-contact state to the strip in order to support the strip-shaped material. The present invention relates to a multi-angle variable nozzle device which is arranged to form a static pressure Arad.

(Prior art) A nozzle device is disposed opposite the upper and lower surfaces of the continuously moving strip-shaped material, and the gas ejected from the nozzle device is applied to static pressure nozzles on the upper and lower sides of the strip-shaped material, respectively. During heat treatment in a floating heat treatment furnace that forms a tube and supports the strip material in a floating manner.

There is an advantage that the strip material does not come into contact with solid objects in the furnace and is not susceptible to scratches. In this floating heat treatment furnace, the nozzle device is arranged in section A, as shown in FIG.

In the conventional nozzle device, as shown in FIG. 2', which is a cross section taken along line P-P in FIG. and 2, a static pressure pad A of static pressure (a) is generated in the upper interval 3 of the strip material 7, and - by the gas jetted from the ten thousand slits 4 and 5 toward the lower surface of the strip material 7. , a static pressure pad B-i of static pressure (b) is generated also in the interval 6 on the lower side of the strip material, and the strip material 7 is levitated due to the difference (b) - (a) between both static pressures. Supported without contact.

Here, the slit shape in a general nozzle device is all 3rd.
To explain it with a diagram, Figure 3 (a) shows two slits 1 and 2.
shows parallel slits provided parallel to each other and in a direction perpendicular to the traveling direction (arrow Y) of the strip-shaped material 7, and although the static pressure pad A is generated, most of the air is blown out (arrows W, W). , and the static pressure of the static pressure pad A is small.Therefore, in order to increase the static pressure, two slits 1 are formed in a direction parallel to the traveling direction Y of the strip material 7 and parallel to each other.
By adding ' and 2', we get a slit, 1 , 1' ,
2. Figure 3 (b) surrounding the static pressure pad with 2'
Also of composition.

However, if the area of the generated static pressure pad is approximately constant and the width of the strip material is smaller than the rlJ of the generated static pressure pad, the same as in the case of Fig. 3 (a) Most of the air blown out moves in the W and W directions, and the generated static pressure is small. The air from the slits hits the area intensively, causing uneven baking.

Further, a static pressure pad generating device for supporting a strip is disclosed in Japanese Patent Application Laid-Open No. 56-123330.

A rectangular fluid outlet is formed on the surface of the main body of the hollow pad generating device disclosed herein facing the strip, and a surface larger than the area of the outlet is provided in the main body in proximity to the fluid outlet to receive pressure. A plate is shown. Although this example is an effective technique for stabilizing the pass line, there are problems when it is used for floating conveyance of a strip-shaped material. That is, although it is possible to follow changes in the width of the strip-shaped material, the range of follow-up is narrow, and therefore it has the same problem as the nozzle device in the case of FIG. 3(b).

(Object of the Invention) The present invention is a polygonal variable nozzle device used for floating conveyance of strip-shaped υ' material, which is used in floating heat treatment furnaces, β-11, etc., in the drying and baking sections of continuous coating lines. (Be sure to spray to ensure heat transfer) IJ
Is it possible to use a belt-shaped material in a horizontal state with the ability to follow changes in the width of the tube? All nozzle devices suitable for conveyance are provided.

(Structure and Operation of the Invention) The present invention is designed to adjust the width of the horizontally moving strip material to an appropriate area even if the width changes.

For a more positive Ui, the appropriate width t in the direction perpendicular to the sheet threading direction can also generate a static pressure nozzle, which stabilizes the crystal efficiency &C and raises it by 7V. It is a polygonal variable nozzle device that can prevent uneven baking due to heat transfer to the strip, which previously occurred due to heat transfer to the strip, and static pressure nozzle width. be.

Therefore, the characteristic part of the polygonal variable nozzle device of the present invention is as follows.
Parallel slits and both 11111K Each has a fixed nozzle part with a gas passage space, and a side slit extending in a direction intersecting the parallel slit, covers the gas passage space, and reciprocates over the identification nozzle part. A movable movable nozzle section is provided on each of the two gas passage spaces, making it possible to change the interval between the side slits as desired.

? ν An example of the configuration of the present invention will be explained with reference to FIGS. 4 and 5.

In the figure, the fixed nozzle part is a frame-shaped nozzle frame 8.
A guide plate 9 is installed in the center of the space with long sides 18 and 18' perpendicular to the threading direction, and has two fixed slits 13° and 13' that are perpendicular to the threading direction and parallel to each other. As shown in Fig. 5-(E), the gas blown out from the fixed slits) 13 and 13' is directed toward the center line X-4 (Fig. 5-(A) 1). The fixed nozzle part R has a slope 17.17"e, which is parallel to both sides of the guide plate 9 and the nozzle frame body 80 in the direction of threading.
, 19' (in other words, the fixed sulin) 1
It is preferable that gas passage spaces 14 and 14' be formed between the extension lines on both sides of each of the slits 13 and 13' so that the slits 13 and the spaces 14 communicate with each other.

Next, S is an active nozzle section, which is divided into two parts, each of which is arranged symmetrically on the fixed nozzle.

Therefore, only the right side of FIG. 4(a) will be explained.

11 is a polygonal plate formed in the shape of a full roof at one end;
is a pentagon in this example, and is located on the guide plate 9.
A central side 239 parallel to the sheet threading direction, parallel sides 21 and 21' perpendicular to the sheet threading direction, and roof-shaped sides 22 and 22' extending in a direction intersecting the sides 21 and 21', respectively.
has. As shown by row in FIG. 5, sloped surfaces 11' similar to those of the nozzle frame 8 are formed on the four sides excluding the side 23. 10 is the polygonal plate 110 sides 21, 21',
22, 22', and the flat plate 10 and the polygonal plate 11 are connected with each other with a gap formed between opposite sides of the similar shapes. It has been done,
A movable parallel slit (15, 15') that partially overlaps the parallel slit 13, 13' of the fixed nozzle part S and extends toward the C body passage space side, and a movable parallel slit 15, 15' that emanates from the end of the movable parallel slit. It has movable lateral slits 16,16' extending in the direction of the movable parallel slits.

Then, the polygonal plate 11 is slidably arranged on the guide plate 9, and the flat plate 10 is guided on the nozzle frame 8 by the guide frames 20, 20', and is arranged so as to be slidable back and forth in a direction perpendicular to the plate threading direction, and then moved. Advancement/retraction device 1 for nozzle part S
It is connected to 2.

Therefore, by operating the advance/retreat device 12, the movable nozzle portion S'fc can be advanced or retracted along the width of the band-like member, and the interval between the side slits that can be moved in both directions can be set to a desired dimension to form a desired static pressure mud. can.

Note that the shape of the movable side slits may be further polygonal, as long as the shape is uniform in the width direction of the +1 tube.

(Effects of the Invention) Since the nozzle device of the present invention is configured as described above,
When the present invention is applied to a continuous coating line, the distance between the side slits that can be moved in both directions is changed to the desired dimension in accordance with the change in the width of the strip material in the drying and baking section to optimize the width of the strip material. Can form a static pressure mud, therefore, there will be no uneven burning or ear drip fc. Appropriate processing of IT-like materials is possible.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of a horizontal heat treatment furnace, and Figure 2 is a conceptual diagram of a horizontal heat treatment furnace. An explanatory diagram of the nozzle device side, Figures 3 (A) and (B) are explanatory diagrams of the arrangement of general nozzles attached to the nozzle device, and Figures 4A and 5B are illustrations of the practical interest of the nozzle device of the present invention. FIG. 5 is a plan view and a partially sectional side view, and FIG. 5 is an exploded explanatory view of an embodiment of the nozzle device of the present invention. . Le...Fixed nozzle part, 8...Nozzle frame, 9...
Guide plate, 10... Polygonal plate, 11... Flat plate, 12.
...Advance/retreat W% 13, 13'...Fixed slit,
14, 14'... IW part during gas passage, 15.15'
...Movable parallel slot 1), 16.16'...Movable side slit, Y...Threading direction, S...Movable nozzle part

Claims (1)

[Claims] (1) In a nozzle device that forms a static pressure pad in a non-contact manner on the strip-shaped material to be threaded, two fixed slit nozzles that are perpendicular to the threading direction and parallel to each other, and both fixed slit nozzles are used. a fixed nozzle portion having a gas passage space between extension lines on both sides of each of the slit nozzles, and a movable parallel slit that partially overlaps with both of the fixed slit nozzles and extends toward the gas passage space. two sets of movable nozzles having a nozzle and a movable side slit nozzle located above the gas passage chamber and extending from the circularly movable slit nozzle in a direction intersecting each circularly movable slit nozzle; the two sets of movable nozzle parts are movable back and forth in a direction perpendicular to the sheet passing direction so that the movable side slit nozzles cover both the gas passage spaces respectively and are on the outside; A polygonal variable nozzle device characterized by its placement on a fixed nozzle section.