CN110285274B

CN110285274B - Braided tube and method for producing same

Info

Publication number: CN110285274B
Application number: CN201910565098.8A
Authority: CN
Inventors: 熊小川; 李松俊; 李响; 郭顺平
Original assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Current assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2021-06-22
Anticipated expiration: 2039-06-27
Also published as: CN110285274A

Abstract

The invention relates to a braided tube and a preparation method thereof. A braided tube comprises a spiral tube, a plurality of elastic wires and a braided sleeve, wherein the spiral tube can elastically contract; the elastic wires are arranged along the axial direction of the spiral pipe and fixed on the spiral pipe, the elastic wires have elastic restoring force and can enable the spiral pipe to elastically contract, and the length of the spiral pipe after elastic contraction is 20% -30% of the length of the spiral pipe when the spiral pipe is not contracted; the woven sleeve is sleeved on the elastic wires and the spiral tube so as to fix the elastic wires on the spiral tube. The braided tube is low in cost and good in flexibility.

Description

Braided tube and method for producing same

Technical Field

The invention relates to the technical field of pipelines, in particular to a braided tube and a preparation method thereof.

Background

With the development of pipes, braided pipes have been commonly used in various fields of production and life, for example, for transporting a medium such as gas or liquid. However, the traditional braided tube is high in cost or poor in flexibility, and is difficult to meet market requirements.

Disclosure of Invention

In view of the above, there is a need for a braided tube that is less costly and more flexible.

In addition, a preparation method of the braided tube is also provided.

A braided tube comprising:

a spiral tube capable of elastic contraction;

a plurality of elastic threads with elastic restoring force, which are arranged along the axial direction of the spiral pipe and fixed on the spiral pipe, wherein the spiral pipe can be elastically contracted by the plurality of elastic threads, and the length of the spiral pipe after elastic contraction is 20% -30% of the length of the spiral pipe when the spiral pipe is not contracted;

the woven sleeve is sleeved on the elastic wires and the spiral tube to fix the elastic wires on the spiral tube.

The traditional braided tube generally needs to be braided with a braided sleeve on a spiral tube, and then the braided tube is flexible in a baking mode, so that the braided sleeve needs to be made of high-temperature-resistant wires, and the cost of the braided tube is high; in addition, if the high temperature resistant wire is not used, although the cost of the braided tube is reduced, the braided tube is inferior in flexibility. And the many elastic wires of above-mentioned braided tube arrange along the axial of spiral pipe to fix on the spiral pipe through the spiral shell, many elastic wires have elastic restoring force, and make the spiral pipe carry out elastic shrinkage, so that the spiral pipe has better flexibility, above-mentioned braided tube need not to adopt the flexibility that high temperature resistant wire rod can realize braided tube promptly. Therefore, the braided tube is low in cost and good in flexibility.

In one embodiment, the elastic restoring force is generated by stretching the elastic threads, and the stretched length of the elastic threads is 20% to 30% of the unstretched length of the elastic threads.

In one embodiment, the spiral tube comprises a tube body and a spiral rib arranged on the tube body in a surrounding mode, the elastic wires are tightly abutted to the spiral rib, and the weaving sleeve is sleeved on the tube body and the spiral rib and tightly abutted to the spiral rib so as to fix the elastic wires on the spiral tube.

In one embodiment, the plurality of elastic strands have an elongation of 200% or more.

In one embodiment, the plurality of elastic strands each have a denier of from 30D to 70D.

In one embodiment, the number of the elastic threads is 10 to 30.

In one embodiment, the elastic threads are selected from one of spandex filament and rubber band.

In one embodiment, the plurality of non-elastic threads are selected from one of nylon threads, acrylic threads, organic synthetic fiber threads, alloy fiber threads and carbon fiber threads.

A method for preparing a braided tube comprises the following steps:

arranging a plurality of elastic wires on the spiral pipe along the axial direction of the spiral pipe after stretching so as to enable the plurality of elastic wires to generate elastic restoring force, wherein the stretched length of the plurality of elastic wires is 30% -60% of the unstretched length of the plurality of elastic wires, and the spiral pipe can elastically contract;

and knitting a plurality of non-elastic threads on the plurality of elastic threads and the spiral tube to form a knitted jacket, so as to fix the plurality of elastic threads on the spiral tube, and enabling the spiral tube to contract by 20% -30% under the elastic restoring force of the plurality of elastic threads, thereby obtaining the knitted tube.

In one embodiment, after the contraction of the spiral tube, the elongation length of the elastic threads is 20% to 30% of the non-elongation length of the elastic threads.

Drawings

Fig. 1 is a schematic structural view of a braided tube of an embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The braided tube 10 of one embodiment can be used as a medical respiratory tube. In particular for use in domestic medical devices for delivering medical media, such as oxygen, air and medicinal vapors with therapeutic functions. Specifically, the braided tube 10 includes a spiral tube 100, a plurality of elastic wires 200, and a braided cover 300.

The coil 100 is capable of elastic contraction. Further, the hardness of the spiral pipe 100 is 50A or less. Specifically, the spiral pipe 100 is selected from one of a TPE pipe and a TPU pipe.

The spiral tube 100 is not limited to the TPE tube and the TPU tube, and the spiral tube 100 may be made of other materials as long as it can elastically contract and transport the medical medium. Specifically, the spiral pipe 100 includes a pipe body 110 and spiral ribs 120.

The tube body 110 has a hollow tubular structure.

The spiral ribs 120 are circumferentially disposed on the tube body 110. Further, the thickness of the tube body 110 between the spiral ribs 120 is 0.23mm or less.

Further, the ratio of the pitch of the spiral ribs 120 to the height of the spiral ribs 120 is 1.8:1 to 3:1, so that the braided tube 10 is more flexible.

Further, the ratio of the width of the spiral rib 120 to the height of the spiral rib 120 is 1:1 to 2: 1. Further, the ratio of the width of the spiral ribs 120 to the height of the spiral ribs 120 is 1.2:1 to create better flexibility of the braided tube 10.

In the extrusion process of the spiral pipe 100, the flow rate of the cooling water is greater than that of the conventional extrusion process, so that the area of the pipe body 110 between the spiral ribs 120 is floated and shaped.

The plurality of elastic threads 200 are arranged in the axial direction of the spiral pipe 100 and fixed to the spiral pipe 100, and the plurality of elastic threads 200 have elastic restoring force to elastically contract the spiral pipe 100, thereby providing flexibility to the braided tube 10. Wherein the length of the spiral tube 100 after elastic contraction is 20 to 30 percent of the length of the spiral tube 100 when not contracted.

Further, the elastic restoring force is generated by the plurality of elastic threads 200 being extended, and the extended length of the plurality of elastic threads 200 is 20% to 30% of the length of the plurality of elastic threads 200 that are not extended, so that the braided tube 10 is more flexible. Specifically, the plurality of elastic threads 200 are in close abutment with the spiral rib 120.

Further, the elongation of the plurality of elastic threads 200 is 200% or more to improve the flexibility of the braided tube 10.

Further, the plurality of elastic threads 200 each have a denier of 30D to 70D to provide the braided tube 10 with better flexibility.

Further, the number of the plurality of elastic threads 200 is 10 to 30. The number of the elastic threads 200 is not limited to the above number, and other numbers of the elastic threads 200 may be used according to the tensile strength requirement of the braided tube 10.

Further, the plurality of elastic threads 200 are each selected from one of spandex filaments and rubber bands. The plurality of elastic threads 200 are not limited to spandex threads or rubber bands, and may be threads having elasticity.

The braided cover 300 is disposed over the plurality of elastic strands 200 and the spiral tube 100 to secure the plurality of elastic strands 200 to the spiral tube 100. Further, the braided sleeve 300 is sleeved on the tube body 110 and the spiral ribs 120, and is tightly abutted against the spiral ribs 120 to fix the plurality of elastic threads 200 on the spiral tube 100.

Specifically, the braided sleeve 300 includes a plurality of non-elastic strands that are braided in a cross-over pattern. Further, the plurality of inelastic threads are knitted in a crisscross manner.

Further, the number of the plurality of inelastic threads is 48 to 128.

Wherein the knitting density of the knitted jacket 300 is 76% to 85% so that the knitted jacket 300 completely covers the spiral pipe 100 to prevent the non-elastic threads from being scattered and exposed out of the spiral pipe 100 during washing or use.

Further, the non-elastic threads each have a denier of 70D to 150D such that the braid 300 completely covers the spiral tube 100.

Specifically, the plurality of non-elastic threads are selected from one of nylon yarns, acrylic yarns, organic synthetic fiber yarns, alloy fiber yarns and carbon fiber yarns.

The braided tube 10 described above has at least the following advantages:

1) the traditional braided tube 10 generally needs to be braided with the braided sleeve 300 on the spiral tube 100, and then the braided tube 10 is flexible in a baking mode, so that the braided sleeve 300 needs to be made of high-temperature-resistant wires, and the cost of the braided tube 10 is high; in addition, if the high temperature resistant wire is not used, although the cost of the braided tube 10 is reduced, the braided tube 10 is inferior in flexibility. The plurality of elastic threads 200 of the braided tube 10 are arranged along the axial direction of the spiral tube 100 and fixed to the spiral tube 100 by a spiral sleeve, and the plurality of elastic threads 200 have elastic restoring force to elastically contract the spiral tube 100, so that the spiral tube 100 has good flexibility, that is, the braided tube 10 can realize the flexibility of the braided tube 10 without using high temperature resistant wires. Therefore, the braided tube 10 is low in cost and good in flexibility.

2) The conventional braid 300 of the braided tube 10 has difficulty in uniformly controlling the pressure applied to the spiral tube 100 during the braiding process, and may easily cause wrinkles on the inner wall of the spiral tube 100. The elastic threads 200 of the braided tube 10 are arranged along the axial direction of the spiral tube 100 and are tightly abutted to the spiral ribs 120, the braided sleeve 300 is sleeved on the elastic threads 200 and the spiral tube 100, and due to the elastic restoring force of the elastic threads 200, the elastic threads 200 can outwards support the braided sleeve 300 sleeved on the spiral tube 100 and increase the distance between the braided sleeve 300 and the tube body 110, so that the pressure of the braided sleeve 300 on the tube body 110 between the spiral ribs 120 is effectively prevented, and the inner wall of the spiral tube 100 is prevented from being wrinkled; meanwhile, under the action of the elastic restoring force of the elastic threads 200, the area of the tube body 110 between the spiral ribs 120 of the spiral tube 100 has deformation memory and is automatically bent outwards, so that the inner wall of the braided tube 10 is prevented from being wrinkled, the inner wall of the braided tube 10 is ensured to be uniform and smooth, the noise of air flow is reduced, or the resistance to fluid is reduced, and the cleaning is facilitated.

3) The braided tube 10 has the advantages of easy cleaning of the inner cavity, beautiful and durable appearance, flexibility and the like.

4) The braided tube 10 has a touch feeling of home textiles and can improve the scratch resistance and stretch resistance of the braided tube 10 by providing the plurality of elastic threads 200 and the braided sleeve 300.

A method of manufacturing a braided tube according to an embodiment is one of the above methods, and includes:

step S410: the elastic threads are stretched and then arranged on the spiral tube along the axial direction of the spiral tube, so that the elastic threads generate elastic restoring force.

Wherein the stretched length of the plurality of elastic threads is 30 to 60 percent of the unstretched length of the plurality of elastic threads. For example, the length of the elastic thread is 1m in a natural state, and the elastic thread is stretched to 1.3 to 1.6m in a weaving process.

The spiral tube can be elastically contracted. Further, the hardness of the spiral pipe is 50A or less. Specifically, the spiral pipe is selected from one of a TPE pipe and a TPU pipe.

The spiral tube is not limited to the TPE tube and the TPU tube, and the spiral tube may be made of other material as long as it can elastically contract and transport the medical medium. Specifically, the spiral pipe includes a pipe body and spiral ribs.

The pipe body is of a hollow tubular structure.

The spiral rib encircles and sets up on the body. Further, the thickness of the pipe body between the spiral ribs is below 0.23 mm.

Furthermore, the ratio of the pitch of the spiral ribs to the height of the spiral ribs is 1.8: 1-3: 1, so that the braided tube has better flexibility.

Further, the ratio of the width of the spiral ribs to the height of the spiral ribs is 1:1 to 2: 1. Further, the ratio of the width of the spiral ribs to the height of the spiral ribs is 1.2:1 to produce better flexibility of the braided tube.

In the extrusion process of the spiral pipe, the flow rate of cooling water is larger than that of conventional extrusion, so that the pipe body area between the spiral ribs is floated and shaped.

Specifically, the plurality of elastic threads are in close abutment with the helical ribs.

Further, the elongation of the plurality of elastic threads is 200% or more, so that the flexibility of the braided tube is better.

Furthermore, the denier of each elastic thread is 30D-70D, so that the braided tube is better in flexibility.

Further, the number of the elastic threads is 10-30. The number of elastic threads is not limited to the above number, and other numbers of elastic threads may be used depending on the tensile strength requirement of the braided tube.

Furthermore, the elastic threads are selected from one of spandex filaments and rubber bands. The plurality of elastic threads are not limited to spandex threads or rubber bands, and may be threads having elasticity.

Step S420: the method includes the steps of knitting a plurality of non-elastic threads on a plurality of elastic threads and a spiral tube to form a knitted jacket, fixing the plurality of elastic threads on the spiral tube, and enabling the spiral tube to contract by 20% -30% under the elastic restoring force of the plurality of elastic threads to obtain the knitted tube.

Further, after the spiral tube is contracted, the elongation length of the elastic threads is 20% -30% of the non-elongation length of the elastic threads.

Further, the woven sleeve is sleeved on the pipe body and the spiral ribs and is tightly abutted to the spiral ribs so as to fix the elastic wires on the spiral pipe.

Specifically, the braided cover includes a plurality of non-elastic strands braided across the cover. Further, the plurality of inelastic threads are knitted in a crisscross manner.

Further, the number of the plurality of inelastic threads is 48 to 128.

Wherein, the weaving density of the weaving sleeve is 76% -85%, so that the weaving sleeve completely covers the spiral pipe and prevents the non-elastic threads from scattering and exposing the spiral pipe in the cleaning or using process.

Further, the non-elastic threads have deniers of 70D-150D so that the woven sleeve completely covers the spiral tube.

The preparation method of the braided tube at least has the following advantages:

1) the preparation method of the braided tube is simple and feasible and is suitable for industrial production.

2) The braided tube eliminates the baking step, so that the cost of the braided tube is lower.

3) The traditional braided tube is difficult to uniformly control the pressure of the spiral tube in the braiding process, and the inner wall of the spiral tube is easily wrinkled. The plurality of elastic threads of the braided tube are arranged along the axial direction of the spiral tube and are tightly abutted with the spiral ribs, the braided sleeve is sleeved on the plurality of elastic threads and the spiral tube, and due to the elastic restoring force of the plurality of elastic threads, the plurality of elastic threads can outwards support the braided sleeve sleeved on the spiral tube, so that the distance between the braided sleeve and the tube body is increased, the pressure of the braided sleeve on the tube body between the spiral ribs is effectively prevented, and the inner wall of the spiral tube is prevented from being wrinkled; simultaneously, under the elastic restoring force effect of many elastic wires, the body region between the spiral rib of spiral pipe has the deformation memory, and automatic outside bending can not prevent to intraductal fold to the intraductal fold that takes place for the inner wall of weaving the pipe, guarantees to weave the even smoothness of inner wall of pipe, reduces the noise of air current or reduces the resistance to the fluid, also does benefit to cleanly.

The following are specific examples:

example 1

The preparation steps of the braided tube of this example were as follows:

1) providing a TPE (thermoplastic elastomer) spiral pipe with the hardness of 40A, wherein the TPE spiral pipe comprises a pipe body and spiral ribs arranged on the pipe body in a surrounding mode, the thickness of the pipe body between the spiral ribs is 0.22mm, the ratio of the thread pitch of the spiral ribs to the height of the spiral ribs is 2:1, and the ratio of the width of the spiral ribs to the height of the spiral ribs is 1.2: 1;

2) after being stretched, 20 spandex filaments are arranged on the TPE spiral tube along the axial direction of the spiral tube, the stretched length of the 20 spandex filaments is 45% of the unstretched length, wherein the spandex filaments are tightly abutted with the spiral ribs, the elongation of the spandex filaments is 240%, and the denier of the spandex filaments is 50D;

3) 80 nylon yarns are crosswise woven on 20 spandex yarns and the spiral tube to form a woven sleeve, so that the 20 spandex yarns are fixed on the spiral tube, the spiral tube is contracted by 25% under the action of elastic restoring force of the spandex yarns to obtain a woven tube, after the spiral tube is contracted, the extension length of the spandex yarns is 25% of the length of the unstretched spandex yarns, the weaving density of the woven sleeve is 82%, and the denier number of the nylon yarns is 70D.

Example 2

The preparation steps of the braided tube of this example were as follows:

1) providing a TPU spiral pipe with the hardness of 30A, wherein the TPU spiral pipe comprises a pipe body and spiral ribs arranged on the pipe body in a surrounding mode, the thickness of the pipe body between the spiral ribs is 0.20mm, the ratio of the thread pitch of the spiral ribs to the height of the spiral ribs is 1.8:1, and the ratio of the width of the spiral ribs to the height of the spiral ribs is 1: 1;

2) after being stretched, 10 spandex filaments are arranged on the TPE spiral tube along the axial direction of the spiral tube, the stretched length of the 10 spandex filaments is 30% of the unstretched length, wherein the spandex filaments are tightly abutted with the spiral ribs, the elongation of the spandex filaments is 200%, and the denier of the spandex filaments is 50D;

3) the method comprises the following steps of carrying out crossed weaving on 48 acrylic fibers on 10 spandex fibers and a spiral tube to form a woven sleeve, fixing the 10 spandex fibers on the spiral tube, enabling the spiral tube to shrink by 20% under the action of elastic restoring force of the spandex fibers, and obtaining the woven tube, wherein after the spiral tube shrinks, the extension length of the spandex fibers is 20% of the length of the spandex fibers which are not extended, the weaving density of the woven sleeve is 78%, and the denier number of the acrylic fibers is 120D.

Example 3

The preparation steps of the braided tube of this example were as follows:

1) providing a TPE (thermoplastic elastomer) spiral pipe with the hardness of 50A, wherein the TPE spiral pipe comprises a pipe body and spiral ribs arranged on the pipe body in a surrounding mode, the thickness of the pipe body between the spiral ribs is 0.23mm, the ratio of the thread pitch of the spiral ribs to the height of the spiral ribs is 3:1, and the ratio of the width of the spiral ribs to the height of the spiral ribs is 2: 1;

2) after being stretched, 30 rubber bands are arranged on the TPE spiral tube along the axial direction of the spiral tube, the stretched length of the 30 rubber bands is 60% of the unstretched length, wherein the rubber bands are tightly abutted with the spiral tube strips, the elongation of the rubber bands is 280%, and the denier number of the rubber bands is 70D;

3) the method comprises the following steps of carrying out crossed weaving on 128 carbon fiber yarns on 30 rubber bands and a spiral tube to form a woven sleeve, fixing the 30 rubber bands on the spiral tube, enabling the spiral tube to shrink by 30% under the action of elastic restoring force of the rubber bands, and obtaining the woven tube, wherein after the spiral tube shrinks, the extension length of the rubber bands is 30% of the length of the rubber bands which are not extended, the weaving density of the woven sleeve is 80%, and the denier number of the carbon fiber yarns is 120D.

Comparative example 1

The preparation procedure for the braided tube of this comparative example was as follows:

2) and (3) criss-cross weaving 80 nylon yarns on the spiral pipe to form a woven sleeve to obtain the woven pipe, wherein the denier number of the nylon yarns is 120D.

Comparative example 2

2) and (2) criss-cross weaving 80 nylon yarns on the spiral pipe to form a woven sleeve, and then baking and softening to obtain the woven pipe, wherein the denier number of the nylon yarns is 120D, the baking temperature is 110 ℃, and the baking time is 60 min.

And (3) testing:

1) the cost of the braided tubes obtained in examples 1 to 3 and comparative example 1 was calculated, and the results are shown in table 1.

2) The braided tube having a length of 50cm was placed on a test table, and the elongation of the braided tubes obtained in examples 1 to 3 and comparative examples 1 and 2 was compared, and the elongation-possible distance of the braided tube was measured with a ruler, and the results are shown in table 1.

TABLE 1

Flexibility test	Example 1	Example 2	Example 3	Comparative example 1	Comparative example 2
						Cost (Yuan)	2.3	2.1	2.5	1.8	2.8
Stretchable distance (cm)	15	12	21	3	15

As can be seen from Table 1, the braided tubes prepared in examples 1 to 3 are better in flexibility than in comparative example 1. Compared with the comparative example 2, the braided tubes prepared in the examples 1 to 3 have lower cost. It is shown that the braided tubes produced in examples 1-3 are relatively low in cost and relatively flexible.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A braided tube, comprising:

the spiral pipe can elastically contract and comprises a pipe body and spiral ribs arranged on the pipe body in a surrounding mode;

a plurality of elastic threads with elastic restoring force, which are arranged along the axial direction of the spiral tube, are tightly abutted with the spiral ribs and are fixed on the spiral tube, and can enable the spiral tube to elastically contract, wherein the spiral tube contracts by 20-30% under the action of the elastic restoring force of the elastic threads;

the woven sleeve is sleeved on the elastic wires and the spiral tube so as to fix the elastic wires on the spiral tube; the knitted jacket includes a plurality of non-elastic threads that are knitted in a cross-over pattern.

2. The woven tube of claim 1, wherein said elastic restoring force is generated by elongation of said plurality of elastic strands, said plurality of elastic strands having an elongation length of 20% to 30% of an unstretched length of said plurality of elastic strands.

3. The braided tube of claim 1 wherein the elongation of the plurality of elastic strands is 200% or greater.

4. The woven tube of claim 1 wherein a plurality of said elastic strands each have a denier of from 30D to 70D.

5. The braided tube of claim 1 wherein the number of elastic strands is between 10 and 30.

6. The woven tube of claim 1, wherein each of said plurality of elastic strands is selected from one of spandex filament and rubber band.

7. The woven tube of claim 1, wherein each of the plurality of non-elastic threads is selected from one of nylon threads, acrylic threads, organic synthetic fibers, alloy fibers and carbon fibers.

8. A method for preparing a braided tube is characterized by comprising the following steps:

arranging a plurality of elastic wires on the spiral pipe along the axial direction of the spiral pipe after stretching so as to enable the plurality of elastic wires to generate elastic restoring force, wherein the stretched length of the plurality of elastic wires is 130% -160% of the unstretched length of the plurality of elastic wires, and the spiral pipe can elastically contract;

9. The method of manufacturing a woven tube as claimed in claim 8, wherein after said helical tube is contracted, an elongation length of said plurality of elastic threads is 20% to 30% of an unstretched length of said plurality of elastic threads.