ES2748449T3 - Manifold - Google Patents

Abstract

A collector (14/16) for the fluid treatment of a fabric, cellulosic material or other fibrous material (12), said collector (14/16) comprising: a closed distribution channel (50) having a port (46) of inlet at one end to supply fluid to the distribution channel (50); and, a plate (44) with at least one conical outlet opening (63); characterized in that said conical outlet opening (63) has a narrow inlet (64) facing the interior of the distribution channel (50) and a wide outlet (65) flush with the outer surface of the plate (44), on the which is the cellulosic fabric or passes another fibrous material (12).

Description

DESCRIPTION

Manifold

Field of the Invention

The present invention relates to a collector. More particularly, it refers to a manifold that can be provided at the supply end of a blower / dryer used to blow fluid, for example, hot air onto fabric, cellulosic or other fibrous material.

Prior art:

WO03 / 038364A1 discloses a residual heat recovery device, an automatic cleaning water filtering device and an exhaust gas regeneration device for stretching frames. In this device, the textile material (TX) woven by a weaving machine is immersed in a mixture of water, resin and chemical products in a settling tank (ST), dehydrated by means of a drainer (MG), and dried and It is heat treated using multiple chambers (CHI to CH4) to improve its quality. Each of the chambers (CHI to CH4) comprises a main body (CM) surrounded by an insulating material (IS) and hundreds of hot air nozzles (HN) to inject hot air to an upper and lower side of the textile ( TX) passing through the center of the main body (CM). The hot air (HN) nozzles are placed in several hot air (HD) distribution boxes connected to a hot air (HP) pipe, and the hot air heated by a heater (HT) cycles through the hot air (HP) using a hot air blower (HB). Each of the gas exhaust pipes (GP) is set on an upper side of each of the chambers (CHI to CH4), the gas exhaust pipes (GP) communicate with a main gas exhaust pipe ( GM) and an exhaust blower (BW) is connected to the main gas exhaust (GM). In other words, the cold air that flows into each chamber through its inlet and exits through its outlet mixes with the air cycle in the chamber and is heated by the heater (HT) to a predetermined temperature, the air Heated hot air flows through the hot air blower (HB) through the hot air pipe (HP) and the hot air distribution boxes (HD) to the hot air nozzles (HN), and the textile (TX ) passing between the upper and lower hot air nozzles (HN) is dried or heated by the hot air that is injected through the hot air nozzles (HN). When the drying or thermal treatment of the textile (TX) is carried out, the moisture contained in the textile (TX) is vaporized to form steam during the drying process, and the gas that contains the resin and chemical products It is generated from the textile material (TX) during the heat treatment process.

However, said previous device does not allow a symmetrical and uniform air impact to the material (fabric).

US 4,586,268 teaches a horizontal heat treatment tunnel for the treatment of fibers, yarns, slit film or similar fibrillar material used in the textile field, in which the material to be heat treated is transported side by side along of a path of travel, in the form of endless length, through the tunnel arranged horizontally, said tunnel comprises a thermally insulated casing having a treatment chamber, an inlet means to allow the entry of the material and an outlet means to allow removal of the material from the housing; a fan chamber; fan means disposed within said fan chamber to effect circulation of a gaseous treatment medium within said housing and through said treatment chamber; heating means disposed downstream of said fan means in the treatment chamber to heat said treatment medium before the treatment medium comes into contact with the fibrillar material moving along said path through said chamber of treatment; fan intake connection means positioned only to extract the gaseous treatment medium from the path; fan exhaust means positioned solely to direct the gaseous treatment means toward the path of travel through the fibrillar material and toward the fan inlet connection means; said ventilator intake connection means includes a ventilator intake chamber tapering away from the travel path on both sides towards the center of the travel route to promote an even flow of the treatment medium through the fibrillary material; said heater means that it extends in parallel and in juxtaposition close to the displacement path in its length and width of the displacement path; screen wall means arranged above and below said heating means to regulate the flow of the treatment medium through said heating means whereby heat is retained around said heating means; means for sealing marginal zones of the heating medium so that said zones are impervious to gases to avoid heat loss from said heating means; and guide means outside said thermally insulated housing for transporting the fibrillary material along said path through the treatment chamber into said housing in a non-contact manner.

However, said above device does not indicate or teach the object of the present invention.

EP 0979985 discloses an apparatus for the heat treatment of a strip of material with a series of nozzles arranged above and below a central conveyor level of the strip of material whereby each die array has a nozzle base with several nozzles directed towards the cloth band. The nozzles have a cylindrical part that is arranged inclined towards the base of the nozzle and has an opening of jet at one end and a funnel-shaped expansion area at the other end, within which the base of the nozzle assembly protrudes. The nozzles are arranged in recesses at the level of the base of the nozzle matrix.

US patent 4271601 corresponding to document DE2935866A1 discloses an apparatus for drying a web, such as a paper web, which includes a plurality of nozzle members positioned successively one after the other, both transverse and transverse to the direction of travel of the web, each of the nozzle members defining a substantially annular groove and a transport surface associated with the groove to direct the gaseous drying fluid substantially adjacent to the transport surface in a field of flow substantially radial with respect to the groove annular and in a direction substantially parallel to the band. As shown in the figures. 4 and 5 in the above patent, the air flow is guided by pan members so that central air is not used in the nozzles. Cymbal parts (intermediate components) are attached by projections to transport surfaces where appropriate grooves or recesses have been provided for projections. The projections can be so dimensioned and located that they limit the flow in such a way that two adjacent nozzles do not blow air directly against each other.

DE29704095 also discloses an apparatus for treating, especially drying, of foil by gas treatment of nozzles. The nozzle body is composed of a nozzle tube, a nozzle support plate, and a nozzle insert. The nozzle tube is connected to a conical diverging surface (intermediate component) protruding from the nozzle plate. The nozzle insert is positioned within the diverging conical surface of the nozzle that is axially displaceable and lockable in a selected position.

Dryers and similar equipment such as heated fireplaces, chill dryers or belt dryers are used to stretch the width of the fabric by air treating the fabrics, especially drying and / or hardening the fabric of textile or paper material.

For this purpose, air / fluid, which is typically heated to 220 ° C per heating element, is applied using many holes / openings in the collector (s) (not shown) to one or both sides of the fabric that it is continuously guided past the collector (s). In the process, it is important to maintain a uniform outlet distribution of the hot air / fluid stream from the collector so that the treatment result is symmetrical and uniform across the width of the fabric, cellulosic or other fibrous material.

The hot air is distributed using so-called collectors that have holes / openings that are arranged above and / or below the fabric, cellulosic material or other fibrous material through which the preheated hot air is supplied using at least one blower.

The disadvantages of the different collector designs used in the prior art can be seen in the figures

1 (a) (i) - (a) (iii), 1 (b) (i) -1 (b) (iii) and 1 (c) (i) -1 (c) (iii) that appears in the attached drawings in which

Figure 1 (a) (i) shows the top view of an opening / hole in a manifold used in the prior art;

Figure 1 (a) (ii) shows the front view of an opening / hole in a manifold used in the prior art;

Figure 1 (a) (iii) shows the front view of the opening / hole computational fluid flow diagram shown in Figure 1 (a) (i);

Figure 1 (b) (i) shows the top view of an opening / hole with stop edges on a collecting plate used in the prior art;

Figure 1 (b) (ii) shows the front view of an opening / hole with stop edges on a collecting plate used in the prior art;

Figure 1 (b) (iii) shows a front view of the opening / orifice computational fluid flow diagram with stop edges on a collecting plate used in the prior art as shown in Figure 1 (b) (i) ;

Figure 1 (c) (i) shows the top view of a zigzag shaped opening / hole in a collecting plate in the prior art;

Figure 1 (c) (ii) shows the front view of a zigzag shaped opening / hole in a collecting plate used in the prior art;

Figure 1 (c) (iii) shows a front view of the zigzag-shaped aperture / orifice computational fluid flow diagram on a collecting plate used in the prior art as shown in Figure 1 (c) ( i);

In the figures described above, the following numbers indicate the indicated / described objects / parts against said numbers:

12 - Fabric;

21- Air / fluid flow leaving the collector;

23 - Air / fluid flow inside the collector;

24- Angle of inclination;

25 - Stop edge on the collector plate;

26 - Circular opening in the collector plate;

27 - Zigzag pattern of the collector plate;

29- Square opening in the collector plate.

A disadvantage of the collector design shown in the figures. 1 (a) (i) - (a) (iii), is an effect related to the flow, which causes the stream (21) of hot air leaving the circular opening (26) in the collector to be inclined in the direction of flow (air), that is, the end of the collector and not at right angles to the plane of the fabric. The inclination angle (24) is the result of the cosine arc of the ratio: sum of the cross sectional area of the air outlet to the cross sectional area of the air inlet of the collector opening (26). The result of this is that the air (21) hitting the fabric (12) does not drift uniformly to the right and to the left in the transverse direction of the collector, but more air flows to the right in the direction of the end of the collector than in the opposite direction. This means that there is more process air at a higher flow rate in the area of the fabric edge that is in the direction of the collector end than in the area opposite the fabric edge that is far from the end of the collector. This resulting difference in heat transfer in the fabric results in an unacceptable difference and variable waste of the fabric in the edge area, both during drying and during setting and finishing processes (the so-called right / left non-uniformity ).

Different approaches to the state of the art are known to avoid the above disadvantage:

In one approach, so-called "stop edges" (25) are used, as shown in Figures 1 (b) (i) - (b) (iii), which ensure an approximately perpendicular air discharge (21) from the collector having a square-shaped opening (29) through the vortex formation, and thus ensuring a uniform discharge on the fabric (12). However, the aerodynamic losses from this approach due to vortex formation and the unfavorable restriction factor caused by square-shaped openings are relatively high.

In another approach, the outlet openings in the manifold are staggered, as shown in the figures. 1 (c) (i) - (c) (iii), to obtain a perpendicular discharge (21) of air from the circular opening (26) in the collector, that is, the collector is provided with a compensation angle with respect to to the vertical plane using a zigzag (27) design of the collector wall, which compensates the discharge angle as precisely as possible in the case of straight, that is to say, non-staggered, collector openings. However, this approach is significantly more complex to manufacture, resulting in additional aerodynamic losses due to the slightly folded zigzag collector plate (27).

Unlike the apparatus described in the prior art documents cited above, the manifold claimed in the present application is simple in construction, does not involve any intermediate components that interfere with the central air / gas stream flowing through the nozzle and It has nozzles of greater cross-sectional area thus increasing the efficiency of fabric / material treatment. Furthermore, the nozzles do not have annular grooves or perforations that are responsible for aerodynamic losses.

Object of the invention

The object of the present invention is to provide an aerodynamically efficient collector at the delivery end of a blower / dryer for the treatment of fabric, cellulosic material or other fibrous material in which a uniform distribution of fluid in its length and width can be obtained of the collector with good results of the treatment of cloth, cellulose or other fibrous material.

This objective is achieved by providing at least one manifold at the delivery end of the blower / dryer, with a plate with at least one outlet opening that is tapered with a narrow inlet facing the inside of the manifold distribution channel and one outlet wide flush with the outside surface of the collecting plate and where the fluid stream uniformly leaves the outlet opening along the plate and the direction of flow is controlled by varying the depth of the conical opening.

Summary of the invention

The collector according to the invention is defined in claim 1. Claims 2 to 6 define preferred embodiments of the invention.

Description of the Invention

The present invention will now be described with the help of the accompanying drawings in which the same numbers are used to denote the same part. However, the drawings only illustrate the invention and in no way limit it.

The terms and words used in the following description and claims are not limited to bibliographical meanings, but are simply used by the inventor to allow a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention is provided for illustrative purposes only and not for the purpose of limiting the invention as defined in the appended claims and their equivalents.

In the attached drawings:

Figure 2 (i) shows a front view of the collector according to this invention.

Figure 2 (ii) shows a side view of the collector according to this invention.

Figure 2 (iii) shows an enlarged view of the collector outlet opening shown in Figure 2 (ii).

Figure 2 (iv) shows an elevation view of the computational fluid flow diagram of the outlet opening shown in Figure 2 (iii).

Figure 2 (v) shows a side view of the computational fluid flow diagram of the outlet opening shown in Figure 2 (iii).

Figure 3 (i) shows a top view of the collector outlet opening according to this invention.

Figure 3 (ii) shows the flow diagram of the fluid exiting through an outlet opening in accordance with this invention.

Figures 4 (a) (i), 4 (b) (i) and 4 (c) (i) show a sectional view of outlet openings of different depths along line AA in Figures 4 (a ) (ii), 4 (b) (ii) and 4 (c) (ii) respectively.

Figures 4 (a) (ii), 4 (b) (ii) and 4 (c) (ii) show lift outlet openings of different depths.

Figures 4 (a) (iii), 4 (b) (iii) and 4 (c) (iii) show an elevation view of the computational fluid flow diagram of the conical outlet opening of different depths

Figure 5 shows a schematic diagram of a pair of collectors at the delivery end of a blower / dryer in accordance with this invention.

In the figures described above, the following numbers indicate the indicated / described objects / parts against said numbers:

12 - Fabric, cellulose or other fibrous material;

14 / 16- Collector according to the present invention;

21 - Fluid flow leaving the distribution channel;

22 - Blower feed channel;

23 - Fluid flow within the distribution channel;

24 - Tilt angle

44 - Distribution channel plate;

46 - Port of entry of the distribution channel;

50 - Collector distribution channel;

63 - Exit opening;

64 - Narrow inlet of outlet opening;

65 - Wide outlet of outlet opening;

66 - Hot air / fluid turbulence;

68 - Depth of conical outlet opening.

According to this invention, the collector (14/16) has a distribution channel (50) with an inlet port (46) that is connected to the delivery end through the supply channel (22) of a blower / dryer (not shown). The distribution channel (50) is closed at the other end, making it a closed distribution channel (50). In a preferable embodiment of the present invention, the distribution channel (50) narrows from the inlet port (46) to the other closed end, which typically resembles the shape of a chimney dome, to avoid the problem of non-uniform treatment of fabric, cellulosic material or other fibrous material. Consequently, the cross-sectional area of the distribution channel (50) is reduced towards the closed end. The collector (14/16) is made up of a plate (44), which has at least one outlet opening (63) that is conical, with a narrow inlet (64) facing the interior of the distribution channel (50) and a wide outlet (65) flush with the outer surface of the plate (44) over which the fabric, cellulosic material or other fibrous material (12) passes. In a preferred embodiment of the present invention, more than one outlet opening (63) is provided in the manifold plate (44) (14/16). The fluid (23) is fed into the collector (14/16) from the feed channel (22) of a blower / dryer through the inlet port (46), From the inlet port (46), the current ( 23) of fluid flows into the distribution channel (50) and is then blown (21) on the fabric, cellulosic material or other fibrous material (12) through the conical outlet openings (63) in the plate (44) .

In a preferable embodiment of the present invention, the sectional area of the distribution channel (50) is such that approximately the same amount of fluid is discharged from all the conical outlet openings (63) regardless of their distance from the port area (46).

Fluid (23) flows from the narrow inlet (64) to the wide outlet (65) of the conical outlet opening (63) in the manifold plate (44) (14/16) and therefore exits ( 21) to the right angle to the plate (44).

The conical outlet opening (63) minimizes internal aerodynamic losses and therefore improves mass flow and provides more aerodynamic laminar flow. Due to the improvement in mass flow rate, the drying / cooling efficiency is improved with the same amount of energy consumption.

In another preferred embodiment according to the present invention, the conical outlet opening (s) (63) is / are nearly circular or oval. Due to such a nearly circular / oval shape of the conical outlet opening (s) (63), very smooth and less turbulent fluid flow is achieved at high speed, resulting in higher mass flow and better drying / cooling efficiency. Furthermore, said conical outlet openings (63) are preferably embossed on the plate (44).

Since individual corrective measures for discharge angle such as stop edges and staggering of outlet openings in the collector are avoided by implementing the innovative conical outlet opening design which is very simple and aerodynamically advantageous to implement , excellent aerodynamics is achieved with little effort, reducing manufacturing cost as well as system power consumption.

In a preferable embodiment of the present invention, the tapered outlet opening (63) is designed to ensure that no sharp edges will come in contact with the fabric, cellulosic material or other fibrous material, especially the woven fabric making the outlet (65). ) Wide of the conical outlet opening (63) flush with the outer surface of the plate (44).

In another preferable embodiment of the present invention, the plate (44) has tapered outlet openings (63) in its length and width, as shown in Figure 2 (i).

In another preferred embodiment of the present invention, the conical outlet openings (63) are arranged in one or more rows, with or without offset from each other.

In another preferred embodiment of the present invention, the plate 44 serves as a wall to the distribution channel 50 and is placed on the upper side of the distribution channel 50.

In another preferred embodiment of the present invention, the collectors (14 and 16) are mirror images of each other. Figure 5 is an illustration of one such preferred embodiment, showing a schematic diagram of a pair of manifolds (14 and 16) at the delivery end of a blower / dryer.

As shown in Figure 3 (ii), the fluid stream (23) flows approximately horizontally through the distribution channel (50) and is deflected in an almost vertical direction to exit (21) from the opening (63) of conical outlet. Fluid stream (23) flows from the narrow inlet (64) to the wide outlet (65) of the conical outlet opening (63). This causes turbulence (66) on that half side of the conical outlet opening (63), which is in the direction of the fluid inlet to the manifold (14/16), that is, against the flow direction of the fluid (23) within the distribution channel (50). This turbulence (66) in turn causes a low pressure, which pulls the fluid stream in a 90 ° vertical direction with sufficient precision as it flows (21) through the conical outlet opening (63). This is similar to the Coanda effect, which is known for fluid dynamics. Depending on the ratio: sum of the cross sectional area of the fluid outlet to the cross sectional area of the fluid inlet fluid from an outlet opening (63), more or less low pressure is needed to achieve the 90 ° vertical direction of the fluid stream (21). This can be accomplished by varying the depth (68) of the conical outlet openings (63). A 90 ° vertical outflow of fluid ensures a 90 ° vertical stroke of the fluid (21) on the fabric, cellulosic material, or other fibrous material (12) which in turn causes a uniform downward flow of fluid throughout the cloth, cellulosic or other fibrous material (12) in the direction of both edges of the cloth, cellulosic or other fibrous material (12). This uniform downdraft results in uniform drying / cooling across its length and width of fabric, cellulosic material, or other fibrous material (12).

In a preferable embodiment of the present invention, said outlet opening (63) operates according to the convergent-divergent nozzle principle, in which the converging part of the outlet opening (63) is created virtually within the channel (50) of distribution by the fluid stream (23) as shown in Figure 2 (v). The narrow inlet (64) of the outlet opening gives a throttling effect or Venturi effect to the fluid flowing from the wider outlet opening (65), which is the so-called diverging part of the outlet opening (63). Due to this throttling effect, the kinetic energy of the fluid increases due to the pressure and internal energy thus created. The diverging portion of the outlet opening (63) helps control the direction of fluid flow as it exits.

In a preferred embodiment of the present invention, rows of collectors (14/16) are proposed on both sides of the fabric, cellulosic material or other fibrous material (12) to be treated, between which spaces are provided, to discharge the fluid ( 21) blown through the outlet openings (63).

In another preferred embodiment of the present invention, the manifold outlet opening (63) (14/16) has a variable depth.

In another preferred embodiment of the present invention, one or more outlet openings (63) of a manifold (14/16) vary in depth from the other outlet openings (63).

ADVANTAGES

The advantages of the present invention are as follows:

1. The collector has a low design cost and is aerodynamically efficient.

2. Maintains a more even distribution of fluid streams ensuring uniform treatment across the width of fabric, cellulose, or other fibrous material.

3. Low manufacturing cost and time.

4. Easy to maintain.

5. Variables easy to define in terms of collector width.

6. Output transmission speed improved due to reduced aerodynamic losses.

7. Mass flow improved due to reduced aerodynamic losses.

8. Improved drying / cooling efficiency.

Claims (6)

1. A collector (14/16) for the fluid treatment of a cloth, cellulosic material or other fibrous material (12), said collector (14/16) comprising: a closed distribution channel (50) having an inlet port (46) at one end to supply fluid to the distribution channel (50); Y, a plate (44) with at least one conical outlet opening (63); characterized in that said conical outlet opening (63) has a narrow inlet (64) facing the interior of the distribution channel (50) and a wide outlet (65) flush with the outer surface of the plate (44), on the which is the cellulose fabric or other fibrous material (12) passes. 2. A collector according to claim 1, characterized in that its distribution channel (50) narrows from the inlet port (46) to the other end. 3. A collector according to claim 1, characterized in that its plate (44) has outlet openings (63) in its length and width. A collector according to claim 3, characterized in that the outlet openings (63) are arranged in one or more rows, with or without offset from each other. 5. A collector according to claims 1, 3 and 4, characterized in that the shape of the outlet opening (s) (63) is / are almost circular or oval. A collector according to claims 3 and 4, characterized in that one or more outlet openings (63) vary in depth from the other outlet openings (63).