JPH0350387Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drying nozzle for a dryer that is applied to ink drying on printing paper, paper drying in a paper machine, and the like.

(Prior Art) A conventional example of the drying nozzle will be explained with reference to FIGS. 2 and 3.
When drying both sides, use multiple drying nozzles 1
are arranged on both sides of the traveling wave a as shown in Fig. 2, and the drying air c (hot air, hot air, etc. ) is an air floater type drying nozzle that floats and dries the traveling wave a, and the ejected drying air c floats and heats the traveling wave a, and then is discharged into the hood of the dryer (not shown). The structure is such that

(Problems to be Solved by the Invention) In the conventional drying nozzle, after the drying air blown out from the drying air blowing surface collides with the traveling wave surface a and is floated and heated, the blown drying air Near the top of the dry air blowing surface, the flow is in the wave width direction, and in front and behind the top, the flow is in the front and rear directions along the traveling wave, and the flow becomes complicated and turbulence is likely to occur, especially in the wave width direction. Disturbances in the flow cause problems such as meandering and flapping of the travel wave.

(Means for Solving Problems) The present invention is a drying nozzle for solving the above-mentioned problems, and is an air floater type drying nozzle in which the front and rear sides are connected to the drying air blowing surface. By providing a suction hole for the dry air blown out on the side surface of the nozzle, and by providing a suction chamber inside the nozzle side surface and connecting it to the suction hole, the dry air blown out from the dry air blowing surface can be actively absorbed. By making the flow flow in the front and rear directions along the drying air blowing surface, the flow in the wave width direction near the top of the drying air blowing surface is significantly reduced, and meandering and flapping of the running wave are prevented, thereby improving floating running performance, drying performance, and reliability. This improves performance and solves the problems mentioned above.

(Function) The drying air blown out from the drying air blowing surface collides with the traveling wave and becomes floating and heated, and the blown drying air is actively sucked in from the suction hole by the suction chamber. The flow flows in the backward direction, and the flow in the wave width direction near the top of the drying air blowing surface is almost eliminated, and the turbulence of the ejected drying air is significantly reduced, making floating running and drying of the traveling wave smooth. Become.

(Example) Fig. 1 shows an embodiment of the present invention, in which a convexly curved drying air blowing surface 12a in which many blowing holes 12b are arranged is provided on the upper part of the drying nozzle 11. Suction holes 12d are provided for the ejected dry air c in the front and rear nozzle side surfaces 12c and 12c connected to the wind blowing surface 12a, and suction holes 12d are provided inside the front and rear nozzle side surfaces 12c and 12c. The chambers 15, 15 are formed by a partition wall 13 and are connected to the suction hole 12d.

Drying air c is supplied from a supply chamber 14 formed by a partition wall 13 at the center of the drying nozzle 11, and the drying air c is ejected from each air outlet 12b onto the drying air blowing surface 12a, forming a traveling wave a. After colliding with the surface and floating and drying, the blown drying air c is actively sucked into the suction chamber 15 from the suction holes 12d provided in the front and rear nozzle side parts 12c and 12c. Because the air is discharged, the ejected drying air c flows in the front and rear directions along the drying air drying surface 12a as shown by the arrow, and the wave width direction flow of the ejected drying air is almost constant near the top of the drying air blowing surface 12a. It's gone.

The supply chamber 14 is connected to a blower for supplying dry air, and the suction chamber 15 is connected to a blower for exhausting air. (Illustration omitted). The suction hole 12
As shown in the figure, a plurality of air blowers d are arranged over an appropriate range of the nozzle side surface 12c, and are designed to suck in almost the entire amount of the blown drying air c.

(Effects of the invention) Since the present invention has the above-mentioned configuration, the drying air blown out from the drying air blowing surface collides with the traveling wave, floats and heats it, and then the blown drying air blows out from the front. , since the air is actively sucked into the suction chamber through the suction hole provided on the side surface of the rear nozzle and exhausted, almost all of the drying air flows in front of the drying air blowing surface, before and after the rear side of the nozzle. directional flow, the flow in the wave width direction near the top of the drying air blowing surface is almost eliminated, and the turbulence of the drying air is significantly reduced, resulting in meandering and meandering of the traveling wave.
The flapping has been significantly reduced, and the floating running performance of the running wave has been improved, as well as the drying performance and reliability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a layout of drying nozzles for drying both sides of a traveling wave, and FIG. 3 is a longitudinal sectional view of a conventional example. 11: drying nozzle, 12a: drying air blowing surface,
12b: Blowout hole, 12c: Nozzle side surface, 12
d: Suction hole, 13: Partition wall, 14: Supply chamber, 15: Suction chamber.

Claims (1)

[Scope of utility model registration request] A drying nozzle that has a drying air blowing surface in which many blowing holes are arranged, and that dries traveling waves by floating them with the drying air that is ejected from the drying air blowing surface. A drying nozzle characterized in that a suction hole for blowing drying air is provided on the front and rear nozzle side portions of the nozzle, and a suction chamber is provided inside the nozzle side portion and is connected to the suction hole.