DE428302C - Drying device for chain yarn sizing machines with hot air drying - Google Patents

Description

GERMAN EMPIRE

ISSUED APRIL 30, 1926

REICH PATENT OFFICE

PATENT LETTERING

- JVl 428302 CLASS 8 a GROUP 25

(G 61325

Paul Greve in Lindau a. Resin.

Drying device for warp yarn sizing machines with hot air drying. Patented in the German Empire on May 3, 1924.

The invention relates to a drying device for warp yarn sizing machines with warm air drying, in which the sized thread web is in a casing runs over a large diameter guide drum.

In this type of drying devices, the invention is that the only one revolving guide drum a closed, unheated jacket with rib-shaped, perforated projections or with support rods and the drum

surrounding, relatively narrow jacket ring space from an indirectly heated stream of warm air is flowed through in the circuit.

According to a particular embodiment of the invention, the heated dry air is driven in a circuit through the jacket ring space and returns to the air flow generator (fan).
The gradually narrowing annular jacket space formed by the slowly rotating, unheated closed drum and the jacket surrounding it at a small distance is, according to the invention, also connected to a dry air supply line with a heater and a return line of the pressure or suction fan, and the sized thread path is guided on the air outlet side via a guide roller to the guide drum and via a second guide roller located in the air inlet duct through a slot in the housing shell to the outside.

It's supposed to be through this simple setup

with as little heat as possible, a perfect drying effect is avoided overheating or overdrying can be achieved.

In contrast to the previously known sizing machines with hot air drying with a large drying room and heat requirement, a very simple, easily accessible and monitored drying device is created according to the invention, in which a very favorable heat utilization is achieved through high drying air speed in a relatively small drying room with the greatest protection of the thread path . Even less durable chain yarns run perfectly through the device.
In particular, it has already been proposed in the case of drying devices on sizing machines that a stream of hot air should be swept along the thread path, which goes back and forth several times in the subdivided drying room, in the same direction. Furthermore, drying devices are known in which the thread web is passed inside a spacious housing over several larger reel-like frames with fans arranged therein, heating elements being provided in the lower part of the surrounding housing and suction fans being provided in the upper part. Finally, drying devices are also known which have a single larger, internally heated, perforated drum, the housing surrounding the drum expanding in the lower part to accommodate radiators and numerous fans and the housing itself being designed to be hollow for the purpose of extracting the vapors.

Compared to the known prior art, both in terms of implementation the heating and the thread guide extremely simplified subject of the invention is shown in the drawing in two exemplary embodiments shown, namely shows

Fig. Ι a side view, partly in section,

Fig. 2 is a plan view of the same embodiment. -

Fig. 3 is part of a somewhat different embodiment in side view.

A space r is formed between the large closed drum α and the jacket b , through which the thread path I traverses. The entry of the threads or yarns I coming from the sizing tub is indicated in Fig. 1 at the bottom right by an arrow. The course goes over the roller? », The drum a, the roller 0 and then back through the opening η to the outside.

The blower g (ventilator or other pressure-generating or suction device) generates an air flow which enters through the channel h. A heating element i (or several) is installed in this channel, as well as a central partition k, which extends right up to the guide roller 0 . A second partition f can expediently be arranged on the other side of the guide roller ο go. The channel h opens approximately in a tangential direction into the shell space r, while on the opposite side a lateral return line q leads to the suction nozzle of the fan g (see Fig. 2).

As can be seen from Fig. 1, the threads Z on the circumference of the drum α do not lie directly on its surface. Rather, perforated ribs e (Fig. Ι and 2) are provided at a certain distance on the drum circumference, the z. B. formed by exposed rods supported at individual points.

In the embodiment according to Fig. 3, a reel-like thread guide is selected, instead of the perforated ribs e , support rods are arranged at a distance from the drum shell.

The drum α can be carried along by the threads running up on the driven chain beam, or it can be given a special drive.

Warp warps up to 700 warp threads can be passed through the device will.

The effect is as follows:

The air heated by the radiator i is driven through the jacket ring space r by the activated blower g and sucked in again. In this cycle, which takes place in countercurrent to the movement of the thread path, the air flow is

42830 ^

next divided by the partitions It and / (Fig. ι) in the channel h . Each of these partial flows must penetrate the thread path above and below the guide roller ο. The air flow then goes through the gradually narrowing jacket ring space under; rinsing the thread path through it.

In a relatively small drying room, effective drying is achieved with the greatest possible heat savings at high air speeds. The threads or yarns are very spared. They are not in contact with heated surfaces. It can't ^! overdrying take place because as soon as the j

bubble is turned off, no heating effect!

exercised more. i

Through the thermal protection of the man!

tels b and the channels h and q ,. as well as the region, the heat savings can be achieved anyway

ao by reusing the air! will be enough, still be increased.

At suitable points of the jacket b or the channels h and q can be closed openings, viewing openings, windows, folding;

as pen, slide or the like. :

Since the thread path is exposed on the drum α as a result of the arrangement of the perforated ribs e or the support rods according to Fig. 3, the air, as can be seen from Fig. 1 and 3, allows free passage under the thread path; In this case, the dry air flows through several times, i.e. effective flushing on all sides. From Fig. Ι and 2 it can also be seen that the) coat b on the right side very close to!

the thread path moves closer. j

If the j

or special threads like one to ^:

If there is great air resistance at those points where the dry air must flow through the thread web, suitable bypass lines can be provided. For example, at the point where the guide roller 0 is installed in the channel h in Fig. 1, a channel could be connected laterally, which opens into the jacket ring space r above the entry point η , thus giving the drying air the opportunity, wholly or partially bypassing ■ this part of the thread path to get to the shell space.

Control devices can also be switched on at suitable points in the ducts through which the air flows, in order to be able to throttle or supply fresh air as required. Of course, the drive of the fan can also be regulated, if necessary as a function of the rotational speed of the drum a.

So that the hot air in the casing annulus r comes into close as possible contact with the yarn path can be on the inner surface of the outer shell b Ableitvorsprünge, ribs o. The like. Stipulate which relegate the warm dry air from the periphery and forward against the yarn path.

Claims (3)

P ATENT claims: ι. Drying device for warp yarn sizing machines with hot air drying, in which the sized thread web runs in a jacket housing over a guide drum of large diameter, characterized in that the single circulating guide drum (et) is a closed, unheated jacket (b) with rib-shaped, perforated projections (e) or with support rods and the relatively narrow jacket ring space (r) surrounding the drum is traversed by an indirectly heated stream of warm air in the circuit. 2. Drying device according to claim I, characterized in that the heated drying air driven through the jacket ring space (r) returns in the circuit to the air flow generator (fan g). 3. Device according to claim 1 and 2, _go, characterized in that the one by the slow circumferential, unheated, closed drum (α) and the surrounding in small distances shell (b) formed by gradually narrowing jacket annular space (R) with Dry air supply line (h) is connected to the heater (i) and a return line (q) of the pressure or suction fan (g) and the layered thread web (I) on the air outlet side (q) via a guide roller (m) to the guide drum (a ) and via a second guide roller (0 ) located in the air inlet duct (K) through a slot (n) in the housing jacket (b) into the open air. 1 sheet of drawings.