Melt delivery line for direct spinning polyester nonwoven fabric

Abstract

The application discloses a melt conveying pipeline for direct spinning polyester non-woven fabric and relates to the technical field of melt conveying. The application comprises a conveying pipeline and a plurality of static mixers. One end of the conveying pipeline is connected with a polyester device through a melt pump, and the other end of the conveying pipeline is connected with a total multi-way valve. The conveying pipeline is composed of a plurality of branch pipelines. The static mixers are fixed between two adjacent branch pipelines. The branch pipelines are provided with jackets. Outer magnetic rings are slidably connected in the jackets. The application sets the jackets on the conveying pipeline and sets the outer magnetic rings in the jackets. The outer magnetic rings can move along the pipeline through the pressure at both ends of the jacket. Meanwhile, the outer magnetic rings can drive the scraping rings on the inner wall of the pipeline to move along the pipeline through magnetic transmission. The scraping rings are opposite to the melt flow direction. The end rings can provide certain force to the melt close to the wall of the pipeline, so that the melt is simply mixed, the melt with strong viscosity is separated from the wall of the pipeline, and the fluency of melt conveying and the stability of the material are improved.

Description

Technical Field

[0001] This invention belongs to the field of melt conveying technology, and in particular relates to a melt conveying pipeline for direct-spun polyester nonwoven fabric. Background Technology

[0002] Melt spinning technology for nonwoven fabric production is relatively mature. However, because the single-line scale of nonwoven fabric spinning production lines is small, while the production scale of polyester plants is large, melt conveying pipelines are needed for conveying and distributing multiple production lines.

[0003] Due to the excessive length of the pipeline and the high temperature carried by the polyester melt, thermal degradation is likely to occur during long-distance transportation. Furthermore, the flow velocity of the melt near the pipe wall differs significantly from that in the center of the pipe during the transportation process. The melt near the pipe wall has a longer residence time, resulting in more severe thermal degradation and the possibility of sticking and twisting, which affects the stable and effective transportation of the melt. Summary of the Invention

[0004] The purpose of this invention is to provide a melt conveying pipeline for direct-spun polyester nonwoven fabric. By setting a jacket on the conveying pipe and setting an outer magnetic ring inside the jacket, the outer magnetic ring can move along the pipe body by the pressure at both ends of the jacket. At the same time, through magnetic transmission, it can drive the scraper ring on the inner wall of the pipe body to move synchronously along the pipe body, opposite to the melt flow direction. Through the end ring, a certain force can be provided to the melt near the pipe wall to perform simple mixing. At the same time, it can separate the viscous melt from the pipe wall, thereby improving the smoothness of melt conveying and the stability of materials.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a melt conveying pipeline for direct-spun polyester nonwoven fabric, comprising a conveying pipe and several static mixers. One end of the conveying pipe is connected to a polyester unit via a melt pump, and the other end of the conveying pipe is connected to a main multi-way valve.

[0007] The conveying pipe is composed of several sub-pipes, and the static mixer is fixed between two adjacent sub-pipes;

[0008] The branch pipe body is provided with a jacket, and an outer magnetic ring is slidably connected inside the jacket. Both ends of the branch pipe body are fixed with pipe openings connected to the jacket.

[0009] A scraper ring is slidably connected inside the pipe body, and both ends of the scraper ring are provided with end rings with an equilateral triangular cross-section;

[0010] The scraper ring has a groove on its circumferential side, and an inner magnetic ring is provided in the groove. The scraper ring is fixed to the outer magnetic ring by the inner magnetic ring.

[0011] The outer diameter of the scraper ring is the same as the inner diameter of the pipe body, and the outer diameter of the inner magnetic ring is smaller than the outer diameter of the scraper ring, with the difference ranging from 0.5 to 2 mm.

[0012] Furthermore, reinforcing ribs are fixed on both sides of the inner sleeve, and the reinforcing ribs are composed of two ribs distributed in a figure-eight shape.

[0013] Furthermore, the reinforcing ribs divide the jacket into two sliding cavities and two supporting cavities, and the outer magnetic ring consists of two arc-shaped magnetic plates, which are slidably disposed within the two sliding cavities respectively.

[0014] Furthermore, each of the two pipe openings at the end of the branch pipe is set to two, and the two pipe openings are respectively connected to the ends of the two sliding cavities.

[0015] Furthermore, both the outer and inner surfaces of the arc-shaped magnetic plate are provided with concave surfaces, and the concave surfaces form sliding portions at both ends of the arc-shaped magnetic plate. The outer surface of the sliding portion is provided with a sealing element, and the sealing element slides along the sliding cavity.

[0016] Furthermore, the length of the inner magnetic ring is the same as the length of the scraper ring, and the length of the arc-shaped magnetic plate is the same as the distance between the end faces of the two rings.

[0017] Furthermore, the conveying pipe is equipped with a melt cooler, which is a shell-and-tube heat exchanger.

[0018] Furthermore, a melt filter is provided on the delivery pipe, and the melt filter is located between the melt pump and the polyester unit.

[0019] Furthermore, the length of the branch pipe is set in the range of 10-50m.

[0020] Furthermore, the end of the static mixer is connected to the end of the branch pipe via a flange, and the flange at the end of the static mixer is provided with a positioning edge, the gap of which is disposed within the branch pipe and is opposite to the position of the scraper ring.

[0021] The present invention has the following beneficial effects:

[0022] 1. This invention involves setting a jacket on the conveying pipe and placing an outer magnetic ring inside the jacket. The outer magnetic ring can move along the pipe body by the pressure at both ends of the jacket. At the same time, through magnetic transmission, it can drive the scraper ring on the inner wall of the pipe to move synchronously along the pipe body, opposite to the flow direction of the melt. Through the end ring, a certain force can be provided to the melt near the pipe wall to perform simple mixing. At the same time, it can separate the viscous melt from the pipe wall, thereby improving the smoothness of melt conveying and the stability of the material.

[0023] 2. This invention improves the service life and positional stability of the conveying pipe by setting two reinforcing ribs inside the jacket to avoid insufficient strength caused by excessive length of the branch pipe.

[0024] 3. By providing a groove on the scraper ring for mounting the inner magnetic ring, the present invention greatly reduces the contact area between the scraper ring and the pipe wall. At the same time, by providing a concave surface on the outer magnetic ring, the contact area between the scraper ring and the jacket is also reduced, thereby reducing the influence of friction on the magnetic driving force.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the pipe body;

[0028] Figure 2 This is a structural sectional view of the pipe body;

[0029] Figure 3 This is a schematic diagram of the structure of the pipe body and the static mixer;

[0030] Figure 4 This is a schematic diagram of the structure of the present invention;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1-Conveying pipe, 2-Static mixer, 3-Mel pump, 4-Polyester unit, 5-Main multi-way valve, 6-Branch pipe body, 7-Mel cooler, 8-Mel filter, 601-Jacket, 602-Outer magnetic ring, 603-Pipe port, 604-Scraper ring, 605-End ring, 606-Groove, 607-Inner magnetic ring, 608-Reinforcing rib, 609-Sliding cavity, 610-Support cavity, 611-Arc-shaped magnetic plate, 612-Concave surface, 613-Sliding part. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-4As shown, the present invention is a melt conveying pipeline for direct-spun polyester nonwoven fabric, including a conveying pipe 1 and several static mixers 2. One end of the conveying pipe 1 is connected to the polyester device 4 through a melt pump 3, and the other end of the conveying pipe 1 is connected to a main multi-way valve 5.

[0035] The conveying pipe 1 is composed of several branch pipes 6, and the static mixer 2 is fixed between two adjacent branch pipes 6;

[0036] The branch pipe body 6 is provided with a jacket 601, and an outer magnetic ring 602 is slidably connected inside the jacket 601. Both ends of the branch pipe body 6 are fixed with pipe ports 603 connected to the jacket 601. Compressed air is supplied to the jacket 601 through an external pressure supply device and through the pipeline and pipe ports 603, forming a pressure difference at both ends of the outer magnetic ring 602, and controlling the displacement of the outer magnetic ring 602 in the jacket 601.

[0037] A scraper ring 604 is slidably connected inside the pipe body 6, and both ends of the scraper ring 604 are provided with end rings 605 with an equilateral triangular cross section.

[0038] The scraper ring 604 has a groove 606 on its circumferential side, and an inner magnetic ring 607 is provided in the groove 606. The scraper ring 604 is fixed to the outer magnetic ring 602 through the inner magnetic ring 607.

[0039] The outer diameter of the scraper ring 604 is the same as the inner diameter of the branch pipe body 6, and the outer diameter of the inner magnetic ring 607 is smaller than the outer diameter of the scraper ring 604, with a difference in the range of 0.5-2mm.

[0040] Among them, such as Figure 1-2 As shown, both sides of the inner sleeve 601 are fixed with reinforcing ribs 608, which are composed of two ribs distributed in a figure-eight shape.

[0041] Among them, such as Figure 1-2 As shown, the reinforcing rib 608 divides the jacket 601 into two sliding cavities 609 and two supporting cavities 610. The outer magnetic ring 602 consists of two arc-shaped magnetic plates 611, which are slidably disposed in the two sliding cavities 609 respectively.

[0042] Among them, such as Figure 3 As shown, the number of pipe openings 603 at each end of the pipe body 6 is set to two, and the two pipe openings 603 are respectively connected to the ends of the two sliding cavities 609.

[0043] Among them, such as Figure 2 As shown, the outer and inner surfaces of the arc-shaped magnetic plate 611 are both provided with concave surfaces 612. The grooves 606 form sliding portions 613 at both ends of the arc-shaped magnetic plate 611. The outer surface of the sliding portion 613 is provided with a sealing element, which slides along the sliding cavity 609.

[0044] The inner magnetic ring 607 has the same length as the scraper ring 604, and the arc-shaped magnetic plate 611 has the same length as the distance between the end faces of the two end rings 605.

[0045] Among them, such as Figure 4 As shown, a melt cooler 7 is provided on the conveying pipe 1. The melt cooler 7 is a shell and tube heat exchanger.

[0046] Among them, such as Figure 4 As shown, a melt filter 8 is provided on the conveying pipe 1, and the melt filter 8 is located between the melt pump 3 and the polyester unit 4.

[0047] The length of the branch pipe 6 is set in the range of 10-50m.

[0048] The static mixer 2 is connected to the end of the branch pipe 6 via a flange. The flange at the end of the static mixer 2 is provided with a positioning edge. The gap of the positioning edge is set inside the branch pipe 6 and is opposite to the position of the scraper ring 604.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A melt conveying pipeline for direct-spun polyester nonwoven fabric, comprising a conveying pipe (1) and several static mixers (2), wherein one end of the conveying pipe (1) is connected to a polyester unit (4) via a melt pump (3), and the other end of the conveying pipe (1) is connected to a main multi-way valve (5), characterized in that: The conveying pipe (1) is composed of several branch pipes (6), and the static mixer (2) is fixed between two adjacent branch pipes (6); The branch pipe body (6) is provided with a sleeve (601), and an outer magnetic ring (602) is slidably connected inside the sleeve (601). Both ends of the branch pipe body (6) are fixed with pipe openings (603) connected to the sleeve (601). The inner part of the pipe body (6) is slidably connected to a scraper ring (604), and both ends of the scraper ring (604) are provided with end rings (605) with an equilateral triangle cross-section. The scraper ring (604) has a groove (606) on its circumferential side, and an inner magnetic ring (607) is provided in the groove (606). The scraper ring (604) is fixed to the outer magnetic ring (602) through the inner magnetic ring (607). The outer diameter of the scraper ring (604) is consistent with the inner diameter of the branch pipe body (6), and the outer diameter of the inner magnetic ring (607) is smaller than the outer diameter of the scraper ring (604), with the difference ranging from 0.5 to 2 mm. The jacket (601) has reinforcing ribs (608) fixed on both sides, and the reinforcing ribs (608) are composed of two ribs distributed in a figure-eight shape; The reinforcing rib (608) divides the jacket (601) into two sliding cavities (609) and two supporting cavities (610). The outer magnetic ring (602) consists of two arc-shaped magnetic plates (611), which are slidably disposed in the two sliding cavities (609). The outer and inner surfaces of the arc-shaped magnetic plate (611) are both provided with concave surfaces (612). The groove (606) forms sliding parts (613) at both ends of the arc-shaped magnetic plate (611). The outer surface of the sliding part (613) is provided with a sealing element, which slides along the sliding cavity (609).

2. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The number of pipe openings (603) at the end of the branch pipe body (6) is set to two, and the two pipe openings (603) are respectively connected to the ends of the two sliding cavities (609).

3. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The length of the inner magnetic ring (607) is the same as the length of the scraper ring (604), and the length of the arc-shaped magnetic plate (611) is the same as the distance between the end faces of the two end rings (605).

4. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The conveying pipe (1) is equipped with a melt cooler (7), which is a shell-and-tube heat exchanger.

5. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The delivery pipe (1) is equipped with a melt filter (8), which is located between the melt pump (3) and the polyester unit (4).

6. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The length of the branch pipe (6) is set in the range of 10-50m.

7. The melt conveying pipeline for direct-spun polyester nonwoven fabric according to claim 1, characterized in that, The end of the static mixer (2) is connected to the end of the branch pipe body (6) through a flange. The flange at the end of the static mixer (2) is provided with a positioning edge. The gap of the positioning edge is set inside the branch pipe body (6) and is opposite to the position of the scraper ring (604).

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