CZ2012709A3 - Device for making bundle of hollow fibers and method of making the same - Google Patents

Abstract

The hollow fiber bundle assembly (6) has a frame structure formed by elongated sides (2) interconnected at both ends by a horizontal sill (3) forming a U profile with the sides (2) and consisting of two frames (1) releasably connected in mirror symmetrical with the adjacent thresholds (3). For profiles at one end, they are closed off with removable mesh (4) with the same width as the threshold (3). The bundle of hollow fibers (6) is made by wound hollow fiber (6) on the sills (3) of the preparation while maintaining a horizontal melt. After winding one row, the spacer plate (5) is placed in the area between the sill (3) and the appendix (4) and another row is wound up. After filling the U-profile, the fibers (6) with the spaced distance lamellae (5) are punched off with the tabs (4), the free space bounded by the threshold (3), the shim (4) and the spacer (5) are filled with the stiffening ends of the fibers (6) are cut off. Thereafter, the tabs (4) are removed, the frames (1) are disassembled, the bundle of fibers (6) is removed from them, and the spacer blades (5) are disengaged, thereby releasing the grouting compound (7) perpendicularly to the direction of the hollow fibers (6) their cavities.

Description

A preparation for making a bundle of hollow fibers and a method of making the bundle

Field of technology

The invention relates to a device for making a bundle of hollow fibers. The product has a frame construction consisting of elongated sidewalls connected at both ends by a horizontal threshold forming a U profile with the sidewalls. The invention also relates to the method of making a bundle of hollow fibers on this preparation.

Current state of the art

Bundles of hollow organic fibers are used as heat exchange surfaces in heat exchangers and as semipermeable membranes in microfiltration devices. A heat exchanger based on hollow fibers allows you to concentrate a large heat exchange surface in a small volume. The proportion of the heat exchange surface it provides to the internal volume of the exchanger exceeds by an order of magnitude this ratio achieved with tubular heat exchangers.

A method of making a bundle of hollow fibers for use in heat exchangers or microfiltration devices is known. Part of this method is the creation of the mouth of the bundle by embedding the ends of the fibers in matrices, e.g. of solidifying polymer or epoxy. After solidification of the matrices, the mouth of the fibers is released by cutting through the matrix perpendicular to the direction of the fibers. This creates integrated flanges at the bundle ends.

Such a method and the apparatus for its implementation are described in GB 1472227. Here, the bundle of hollow fibers becomes a fixed part of the frame on which it was formed. The rectangular frame has two opposite arms weakened relative to the rest. A hollow fiber is wound on them, and the fibers are connected to them with a potting compound. After the matrix solidifies, the entrance to the cavities is opened by cutting through the matrix perpendicular to the direction of the fibers. This creates a frame building element for composite exchangers in which the fibers run parallel without precisely defined mutual spacing.

The parallel arrangement of the hollow fibers in the heat exchanger is advantageous when the media flow outside the fibers is stabilized in terms of speed and direction. In some applications it is more advantageous to freely disperse the fibers in the volume of the exchanger.

The invention sets itself the task of designing a preparation for making a bundle of hollow fibers for the above application and a method of making the bundle.

- 2 The essence of the invention

The stated task is solved by a tool for making a bundle of hollow fibers, which has a frame structure formed by elongated sidewalls connected at both ends by a horizontal threshold forming a U profile with the sidewalls. Its essence consists in the fact that it is composed of two frames that can be disassembled from each other in a mirror-symmetrical position with thresholds adjacent to each other, while the U profiles at one end are closed by removable inserts with a width equal to the width of the threshold.

To define the spacing of the fibers at the exit from the flange, spacer slats located between the threshold and the attachment are part of the product.

In order to make the assembly of the bundle flange more precise, grooves for guiding the slats are preferably created in the inner walls of the sidewalls.

In order to prevent slippage of the fibers during assembly, at least one longitudinal edge of the lamella may be roughened.

The method of making a bundle of hollow fibers on the mentioned product is that a hollow fiber is wound on the thresholds of the product while maintaining a horizontal pitch, after winding one row, a spacer lamella is placed on it in the area between the threshold and the insert and the next row is wound, after filling the U of the profile, the fibers with interspersed spacer lamellas are clamped with inserts, the free space defined by the threshold, insert and spacer lamellas is filled with a solidifying potting compound, after which the protruding ends of the fibers are cut off, the inserts are removed, the frames are disassembled, the bundle of fibers is removed from them and the spacer the lamellas slide out, after which their cavities are released by cutting through the potting material perpendicular to the direction of the hollow fibers.

Clarification of images on the drawing

The invention will be further clarified with the help of the drawing, in which Fig. 1 shows an exemplary design of the preparation for making a bundle of hollow fibers in a perspective projection, Figs. 2 and 3 are sections of the preparation according to Fig. 1 demonstrating an alternative dual possibility of applying the potting compound in the preparation.

Examples of implementation of the invention

The device according to Fig. 1 of the frame structure is composed of two frames 1 mutually dismountable connected in a mirror-symmetrical position. Frames 1 are formed

-3 elongated sidewalls 2 connected at both ends by a horizontal threshold 3 forming a U profile with the sidewalls 2. Floor 3 of both frames £ are adjacent to each other. For the profiles at one end of the frames £, they are closed by removable inserts 4 with a width equal to the width of the threshold 3. Part of the device are spacer slats 5 located between the threshold 3 and the insert 4.

The bundle of hollow fibers is formed on the said preparation by winding the hollow fiber 6 on the thresholds 3 of the preparation while maintaining the horizontal spacing. After winding one row, a spacer lamella 5 is placed on it in the area between the threshold 3 and the attachment 4, and another row of hollow fiber 6 is wound on it. After the U profile is filled, the fibers 6 with the interposed spacer lamellas 5 are clamped by the attachments 4, the free space defined by the threshold 3, the insert 4 and the spacer lamellas 5 are filled with a solidifying potting compound 7, after which solidification the protruding ends of the fibers 6 are cut off, the inserts 4 are removed, the frames £ are unfolded, the bundle of fibers 6 is removed from them and the spacer lamellas 5 are extended, after which by cutting the potting material 7 perpendicular to the direction of the fibers 6, they release their cavities. It is clear from Fig. 2 and 3 that the space for the potting material 7 can be created either in front of or behind the row of spacer lamellas 5.

To facilitate assembly of the bundle in the fixture, grooves 8 are formed in the inner walls of the sidewalls 2 for guiding the slats 5, and one longitudinal edge 9 of the slat 5 is roughened.

Claims (5)

PATENT CLAIMS 1. A preparation for the production of a bundle of hollow fibers, which has a frame structure consisting of elongated sidewalls connected at both ends by a horizontal threshold forming a U profile with the sidewalls, characterized by the fact that it is composed of two frames (1) mutually dismountably connected in a mirror-symmetrical position to each other adjacent thresholds (3), while the U profiles at one end are closed by removable inserts (4) with a width equal to the width of the threshold (3). 2. The preparation according to claim 1, characterized in that it includes spacer slats (5) located between the threshold (3) and the insert (4). 3. The preparation according to claim 2, characterized in that grooves (8) are formed in the inner walls of the sidewalls (2) for guiding the slats (5). 4. The preparation according to claim 2 or 3, characterized in that at least one longitudinal edge of the lamellae (5) is roughened. 5. The method of making a bundle of hollow fibers on the mentioned preparation, characterized by the fact that the hollow fiber (6) is wound onto the thresholds (3) of the preparation while maintaining a horizontal spacing, after winding one row, it is placed on it in the area between the threshold (3) and spacer lamella (5) with attachment (4) and the next row is wound, after filling At the profile, the fibers (6) with interlaced spacer lamellas (5) are clamped with attachments (4), the free space defined by the threshold (3), attachment (4) and the spacer lamellas (5) are filled with a solidifying potting compound (7), after solidification, the protruding ends of the fibers (6) are cut off, the inserts (4) are removed, the frames (1) are disassembled, the bundle of fibers (6) is removed from them and the spacer slats (5) extend, after which their cavities are released by cutting the potting material (7) perpendicular to the direction of the hollow fibers (6).