JPS5824543B2 - Slit nozzle for producing wide liquid jets - Google Patents

Description

Detailed Description of the Invention The present invention provides a slit nozzle for producing a liquid jet that is wide and narrow when viewed in the width direction and in a direction perpendicular to the jet direction. The casing has a slit-like nozzle opening extending along the casing and a supply opening provided at one end, through which liquid is directed in the longitudinal direction of the casing. furthermore, said nozzle opening is limited by a wall provided in the casing, said wall being arranged in a plurality along the casing in the external area of the nozzle opening cross-section in order to vary the width of the nozzle opening; It relates to a type that is movable using an adjustment member.

A slit nozzle of this type is known from DE 23 34 998 A1.

In the known design, the nozzle opening is formed by two lamella edges projecting in the direction of the jet, which lamella edges extend perpendicularly through the nozzle opening and are distributed over the entire length of the nozzle slit. They are joined against liquid pressure by guided rivets.

In such a configuration, a rivet passing through the nozzle jet creates local vortices in the flow.

In special applications, such swirling currents can lead to striped and uneven dyeing, for example in the textile dyeing industry, especially carpets.

Furthermore, the width of the slit cannot be adjusted later.

The object of the invention is to provide a slit nozzle of the type mentioned at the outset, which produces an uninterrupted nozzle jet that can vary in thickness over its width.

According to the invention, this problem can be solved by providing a partition wall in the casing along the longitudinal direction on the side opposite to said wall, and a supply opening is formed between the partition wall and the wall between the partition walls. opening into the casing between the oppositely located casing back wall, the partition wall having a number of overflow openings distributed over its entire length, the overflow openings being located between the wall and the partition wall; It leads into a divided chamber provided in The solution is that the relative spacing between the diaphragm plate and the diaphragm plate is variable using adjustment elements distributed over the entire length of the casing.

Although the walls fixed to the casing are generally stable in shape, they have some degree of flexibility to allow for travel or movement about the fixed part.

In this way, the jet thickness is adjusted without the provision of movable or rotatable components, ie without the provision of necessary component seals.

It is thus possible to vary the jet thickness differently over the width of the slit nozzle.

Since the adjusting element is arranged in the outer region of the nozzle opening cross-section, the nozzle jet is not interrupted at any point and is not disturbed by swirls.

Since the nozzle is primarily used within a continuous textile finishing process, the slit nozzle of the invention has the particular advantage that there is no possibility of lint being trapped anywhere in the liquid. .

This is because, in the case of the slotted nozzle according to the invention, there are no edges projecting into the flow path or obstacles that interrupt the nozzle jet.

It is important that the lint contained in the liquid is not trapped and therefore that lint clumps are not formed.

This is because the lint contained in the liquid which is rolled up and sprayed onto the fabric from the nozzle can seriously impede subsequent processes such as printing or dyeing the fabric and result in rejects.

Furthermore, in the configuration of the present invention, the entire chamber formed in the casing is divided by a partition wall into divided chambers provided one after the other with respect to the nozzle opening, in which case the liquid first flows into the rear divided chamber. and then passes through the overflow opening into the front compartment on the side of the nozzle opening.

The overflow opening ensures a constant flow condition into the front compartment and thus the nozzle jet.

In practice, the configuration of the invention provides an important property of slotted nozzles, that the outflow velocity and the outflow amount can be adjusted independently of each other.

The flow rate depends on the position of the throttle plate in front of the overflow opening.
Therefore, it is defined.

This is because this directly influences the amount of liquid transferred into the front compartment.

The rate at which such a volume of liquid flows out of the nozzle opening is
It is related to the width of the nozzle opening, which width itself can be adapted to the requirements by means of an adjustment element.

If one value is adjusted in the manner described, the other value will change somewhat, but the desired combination of outflow velocity and outflow amount is always maintained by post-adjustment.

Furthermore, according to an advantageous embodiment of the invention, the wall, the diaphragm plate and the partition wall are bent at their longitudinal edges facing away from the nozzle opening, and the folds are superimposed on one another and are formed together by the U. It is fixed to the leg of the casing formed by the character-forming member on the side opposite to the nozzle opening.

Advantageously, the adjustment member can be constructed as a threaded pin arranged on the outside of the wall and extending approximately in the same direction as the wall.

The small angle allows very significant wall movement and thus fine adjustment of the nozzle jet thickness with only small adjustments of the threaded pin.

The invention will now be explained with reference to the illustrated embodiment.

The slit nozzle illustrated in FIGS. 1 to 4 and designated generally by the reference numeral 10 has a casing 1 consisting of a U-shaped molded part; The casing 1 is open on the side where the nozzle opening is provided.

A supply opening 3 is provided at one end of the casing 1, via which liquid can be supplied in the longitudinal direction of the casing 1.

At the opposite end, the housing 1 has a bearing pin 4 on which a slit nozzle 10 is supported.

As is clear in particular from FIG. 2, the rear compartment 5 formed in the housing 1 is designed to compensate for the pressure drop caused by the outflow of liquid through the nozzle opening 2 by narrowing the cross-sectional area. It is gradually reduced in size from the right side, that is, from the side where the supply opening 3 is provided.

In short, the rear subchamber 5 is significantly wider in the cross-section of FIG. 3 near the feed opening 3 than in the cross-section of FIG. 4 on the side opposite the feed opening 3.

On the open side, the housing 1 is partitioned off by a wall 6 which is bent at its lower long edge 7 and is tightly connected there to the leg 8 of the housing 1.

At its long edge 7 facing the leg 9, the wall 6 has a spacing that defines the nozzle opening 2.

The wall 6 is not at right angles to the legs 8, 9, but rather slopes somewhat outwards from the side connected to the legs 8, ie towards the open side of the casing 1.

An angle member 11 is attached to the wall 6 near the nozzle opening 2.
is provided, in which an adjusting element 12 formed as a threaded pin engages the angle element 11, and is supported on the leg 8 of the housing 1.

When the threaded pin is adjusted, the wall 6 is pivoted about the bend 7 and thereby changes the width of the nozzle opening 2 due to the slight inclination.

A partition wall 15 is arranged between the wall 6 and the back wall 13 of the casing 1, and this partition wall 15 is connected to the slit nozzle 10.
The slit nozzle 10 has an overflow opening 16 extending over the entire length of the nozzle 10 and distributed over the entire length of the slit nozzle 10.

The liquid which can only flow into the rear subchamber 5 from the supply opening 3 reaches in a constant flow via the overflow opening 16 into the front subchamber 17 from which the liquid flows through the nozzle opening 2. leaks through.

The overflow opening 16 has a nozzle-like circular opening 18 to ensure unobstructed flow.

A slit nozzle 1 is also provided between the partition wall 15 and the wall 6.
A diaphragm plate 19 extending over the entire length of 0 is arranged.

The diaphragm plate 19 is fixed to the leg 8 of the housing 1 together with the fold 7 of the wall 6 by a fold 20 in the same way as the partition wall 15 with the fold 21 .

Said fixing is effected by spot welding or by means of a schematically illustrated fixing element 22.

The angular position of the diaphragm plate 19 relative to the wall 6 and thus its spacing relative to the overflow opening 16 can be adjusted by means of an adjusting member 23 configured as a threaded pin.

This determines the degree of throttling in the overflow opening 16 and thus the initial amount of liquid that passes from the rear compartment 5 to the front compartment 17.

The outflow velocity is determined by the cross-sectional area of the nozzle opening 2,
The nozzle opening 2 is adjustable by manipulation of a threaded pin.

Whereas the rear subchamber 5 is variable over the entire length of the slit nozzle, the arrangement of the components 6, 12, 15, 19 is such that the position in the nozzle opening 2 is uniform, so that the point of the cross-sectional area is It is almost uniform over the entire length of the slit nozzle.

In the case of the slit nozzle 30 shown in FIGS. 5 to 7, the supply opening 33 is provided on the right side (see FIG. 5), and the liquid flows from right to left.

The housing 31 again consists of a U-shaped molded part, but it is bent outwards, as indicated by 34, on the side where the nozzle opening 32 is provided (FIG. 6). reference).

The wall 36 fixed to the leg 38 of the casing 31 extends substantially parallel to the fold 34 beyond the upper leg 39 of the casing 31, so that the nozzle opening 2 has an approximately parallel nozzle-like configuration. formed by parts.

This provides particularly good directionality for the nozzle jet.

A partition wall 45 is arranged in the chamber formed in the casing 31, and the partition wall 45 has a relative spacing with respect to the wall 36 such that the front divided chamber 37 is on the side where the supply opening 33 is provided. can be varied by a threaded pin 40 to gradually taper from .

The wall 36 is fastened by a bend 41 to a leg 38 of the casing 31, to which is also fastened a supporting angle member 42 which carries an adjustment member 43, 44, which is designed as a threaded pin. The adjusting members 43, 44 act approximately at right angles to the wall 36 and influence the width of the nozzle opening when adjusted by pivoting about the bend 41 of the wall 36.

Therefore, the liquid that flows only into the front compartment 37 via the supply opening 33 has a total volume regulated by the position of the partition wall 45 relative to the wall 36, whereas the nozzle opening 32 A double adjustability is obtained in that the width and thus the outflow rate can be adjusted via the adjusting elements 43,44.

[Brief explanation of the drawing]

The drawings show two embodiments of the invention, the first
The figure is a side view of the first embodiment of the present invention as seen from the nozzle opening side, Figure 2 is a plan view of Figure 1, and Figure 3 is Figure 2 -
4 is a cross-sectional view along the line IV--IV in FIG. 2, FIG. 5 is a partial bottom view of another embodiment of FIG. 6, and FIG. FIG. 5 is a cross-sectional view taken along the line ■-VI, and FIG. 7 is a partial view of FIG. 6 viewed from the left. 1... Casing, 2... Nozzle opening, 3... Supply opening, 4... Support pin,
5...Divided room, 6...Wall, 7...
... Long edge, 8, 9... Leg, 10...
...Slit nozzle, 11...Angle member,
12... Threaded pin, 13... Back wall, 15... Partition wall, 16... Overflow opening, 17... Division Room, 18...
...Circular opening, 19...Aperture plate, 20.21
...Bending portion, 22...Fixing member,
23... Adjustment member, 30... Slit nozzle, 31... Casing, 32...
・Nozzle opening, 33...--Supply opening, 34...
... bending part, 36 ... wall, 37 ...
...Divided chamber, 38.39...Legs, 40...
...Threaded hole, 41...Bent part, 4
2...Support angle member, 43.44...
...Adjustment member, 45...Partition wall.

Claims (1)

[Scope of Claims] 1. A slit nozzle for producing a liquid jet that is wide and narrow when viewed in the width direction and in a direction perpendicular to the jet direction, which has a vertically elongated casing extending in the width direction of the liquid jet. The casing has a slit-shaped nozzle opening extending along the casing and a supply opening provided at one end, through which liquid can be supplied in the longitudinal direction of the casing. , furthermore said nozzle opening is limited by a wall provided in the casing, said wall having a number of adjustments arranged along the casing in the external area of the nozzle opening cross-section for varying the width of the nozzle opening. In a version that is movable by means of elements 12, 43, 44, a partition wall 15 is provided along the longitudinal direction in the casing 1, on the side opposite said wall 6, and which extends through the supply opening 3. is the partition wall 15 and the partition wall 1
The partition wall 1 is opened into the casing 1 between the casing back wall 13 located opposite the wall 6 with the partition wall 5 in between.
5 has a number of overflow openings 16 distributed over its entire length, which overflow openings 16 open into a dividing chamber provided between the wall 6 and the partition wall 15;
A throttle plate 19 is arranged between the wall 6 and the partition wall 15, which extends over the entire length of the casing 1 in front of the overflow opening 16 and which connects the overflow opening 16 and the throttle plate 19. A slit nozzle for producing wide liquid jets, characterized in that the relative spacing between them is variable by means of adjustment members 23 distributed over the entire length of the casing. 2. The wall 6, the diaphragm plate 19 and the partition wall 15 are bent at their longitudinal edges opposite to the nozzle opening 2, and the bent portions 7, 20, 21 are superimposed on each other and together form a U-shape. 2. A slit nozzle for producing a wide liquid jet according to claim 1, which is fixed to a leg 8 of a casing formed as a molded part on the side opposite the nozzle opening 2.