DE1954099A1 - Heating element for the heat treatment of threads - Google Patents

Description

3609-69

SOCIETE CIVILE TEXTILE - SOCITEX

Heating element for the heat treatment of threads

The invention relates to the heating elements

for the heat treatment of threads, especially threads for the textile industry, especially for synthetic and artificial ones Yarn processing machines for wrong twist.

So far, the thermal energy has been transferred between a heating element and the thread to be treated either by conduction, with the thread to be heated The thread was in contact with a warm surface, or by radiation, whereby the thread to be heated by a warm Wall was surrounded, or by convection, whereby the thread to be heated is exposed to the action of a warm flow medium but no heating element is known which allows two of the above types of heat transfer at the same time or even apply all three.

The invention aims in particular to

109823/1959

to train like heating elements so that they are better than before meet certain practical requirements} in particular with regard to the effectiveness of the heat transfer between the heating element and the thread to be treated.

The heating element according to the invention is characterized by a tube, the wall of which has at least one inner one 2one, which extends radially up to the vicinity of the axis of the tube, the distance between this inner zone and the axis of the tube is preferably equal to the radius of the thread to be treated, and axially over the entire length of the Tube extends on a helical path, so that the coaxially moving in this heating element to be treated The thread is in contact with the inner zone surrounding it, so that the transfer of thermal energy between the heating element and the thread to be treated at the same time through heat conduction (since yes the thread with the inner zone on the whole Length of the heating element is in contact), by radiation (since the thread is held equiaxed to the pipe and the receives thermal energy radiated vertically inwards from the wall of the pipe) and by convection (since the thread of a helical flow of warm fluid flows around it, which flows in the tube and through the inner Zone).

The invention is explained below by way of example with reference to the drawing.

Fig. 1 is a schematic perspective view

Partial view of a according to a first embodiment of the invention trained heating element with breaking away of parts.

Figures 2, 3 and 4 are an end view and an end view, respectively.

two cross-sections of the heating element along planes II, III and IV of FIG. 1.

Figures 5, 6, 7 and 8 are cross-sections of other embodiments of a heating element according to the invention.

As shown in Figs. 1 to 4, the

inventive heating element on a tube 2, the wall of which has an inner zone 3 which extends radially up to the vicinity of the axis XX of the tube 2, the distance between this inner zone 3 and the axis XX of the tube 2 being equal to the radius of the

109823/1959

is to be treated thread 4, and extends axially over the whole length of the tube 2 on a helical path.

The thread 4 to be treated moves

coaxially in the heating element 1, so that it is with the inner surrounding zone 3 is in contact.

Under these conditions the

Transfer of thermal energy between the heating element 1 and the thread to be treated 4 simultaneously by conduction, because the thread 4 with the inner zone 3 over the entire length of the heating element 1 is in contact, by radiation, since the thread 4 is held coaxially in the tube 2 and the Thermal energy radiated vertically inward from the wall of the tube 2 receives, and by convection, since 3a the wire 4 of a helical flow of a warm flow medium is washed around, which flows in the pipe 2 and is guided through the inner zone 3 (natural or forced flow of the warm fluid).

According to non-illustrated embodiments of the invention, the pipe could have several inner zones, each of which extends radially up to the vicinity of the axis of the tube and axially over the entire length of the same according to a helical shape Web extends, these inner zones in the manner of the screw threads of a multi-start screw evenly on the Wall of the pipe are distributed.

In the embodiment shown in FIGS. 1 to 4, the tube 2 has a single inner zone 3 o

It should be noted that the ratio

between the pitch A of the helical path of this inner zone 3 and the inner diameter D of the pipe 2 is expedient is between 10 and 50.

The pitch A of the helical path

the inner zone 3 can be constant or variable over the entire length of the tube 2.

This training gives you a good one

Heat transfer by conduction, since the length of the contact between the inner zone 3 and the thread 4 reaches a high value, and by convection, since the helical one Flow of a warm fluid flowing in the pipe 2

HHA: I xj ν / * +; ..-

is sufficiently homogenized.

In the embodiment shown in FIGS. 1 to 4 and 6, the inner zone 3 has a full cross-section, while the tube 2 maintains a circular external cross-section.

In the embodiment shown in FIGS. 5 and 7, in which the same reference numerals denote the same parts as in FIGS. 1 to 4, the inner zone 3 has a hollow cross section and is formed by deformation of the tube 2. The pipe 2 then no longer has a circular outer cross-section, but this remains inscribed in that of the pipe 2 before it is deformed.

In the embodiment shown in Fig. 8

form in which the same reference numerals denote the same parts as in Figs. 1 to 4, the inner zone 3 has a flat cross-section and is formed by a diameter zone. In this case, too, the pipe 2 does not have a circular external cross section more, but this remains inscribed in the cross-section of a tube which has the same outside diameter as the tube 2 forming the heating element 1 has.

The heating element according to the invention enables

that is, the use of the three types of heat transfer, whereby an effective rapid heating of the thread to be treated is achieved will. In addition, the heating element has the outer shape of a straight line Rohrs, which means that it is easy to insert into special heating blocks and easy to install in existing heating arrangements instead of conventional heating elements to improve the efficiency of the same allows.

10 * 123/1959

BATH ORIGINAL

Claims (1)

- 5 -
Claims M , J heating element for heat treatment of threads, in particular for the textile industry, characterized by a tube (2), the wall of which has at least one inner zone (3) which extends radially up to the vicinity of the axis (XX) of the tube (2), the distance between this inner zone (3) and the axis (XX) of the tube (2) is preferably equal to the radius of the thread to be treated (4), and extends axially over the entire length of the tube (2) on a helical path ^ so that the Paden (4) to be treated and moving equiaxially in the heating element (1) is in contact with the surrounding inner zone (3) in such a way that the heat transfer between the heating element (1) and the thread (4) to be treated simultaneously by conduction (da 3a of the thread (4) ir it the inner zone (3) is in contact over the entire length of the heating element (1)), since the thread (4) is held coaxially to the tube (2) through radiation (and receives the heat energy radiated vertically inwards from the wall) u nd by convection (since the thread (4) is washed around by a helical flow of a warm fluid which flows in the tube (2) and is guided through the inner zone (3)). 2 ·) Heating element according to claim 1, characterized by several inner zones, each of which is radially extends up to the vicinity of the axis of the tube and axially over the entire length of the same on a helical path, these inner zones are evenly distributed over the wall of the pipe. 3.) Heating element according to claim 1, characterized by a single inner zone (3) which extends radially up to the vicinity of the axis (XX) of the tube (2) and axially over the length of the same on a helical path, wherein the ratio between the pitch (A) of the helical path of the inner zone (3) and the inner diameter (D) of the pipe (2) is suitably between 10 and 50. 4.) Heating element naoh claim 1, characterized 109823/19 * 9 _ ₆ _ 19b4Ü99- marked that the pitch (A) of the helical Path of the inner zone (3) is constant over the entire length of the tube (2). 5.) Heating element according to claim 1, characterized characterized in that the pitch (A) of the helical B-ahn of the inner zone (3) is variable over the length of the pipe (2) is. '6.) Heating element according to claim 1, characterized characterized in that the inner zone (3) has a full cross-section. 7.) Heating element according to claim 1, characterized characterized in that the inner zone (3) has a hollow cross-section and that it is obtained by deformation of the tube (2) is established. 8.) Heating element according to claim 1, characterized characterized in that the inner zone (3) has a flat cross-section and is formed by a diameter zone. 109823/19 * 9 Blank page