Reelpipe hot cutting device

Abstract

The invention discloses a reel pipe hot cutting device, and belongs to the technical field of cable processing, the reel pipe hot cutting device comprises a main body frame, a plurality of positioning pieces and a hot cutting module, the plurality of positioning pieces are arranged on the main body frame, the plurality of positioning pieces extend along a first direction and are arranged at intervals in the first direction, and each positioning piece is provided with a first surface and a second surface which are deviated from each other; the positioning piece is used for penetrating through the reel pipe so that the reel pipe can be wound around the positioning piece, at least part of the reel pipe is located on the first face, and at least the other part of the reel pipe is located on the second face. The reelpipes are wound around the positioning piece, deformation of the reelpipes can be effectively prevented, the reelpipes are arranged on the inner wall and the outer wall of the positioning piece, contact between the reelpipes can be avoided, and the phenomenon that the reelpipes are mutually adhered or wiredrawn in the thermal cutting process can be prevented. The labor cost can be effectively reduced by using the positioning piece, and the adhesive part of the reel pipe does not need to be torn manually.

Description

Technical Field

[0001] This application belongs to the field of cable processing technology, specifically relating to a hot-cutting device for coiled tubes. Background Technology

[0002] With the continuous development of automobiles and the rapid increase in electric vehicles, the amount of cables used has also increased, leading to more stringent requirements for cable protection and a greater need for lightweight designs. Currently, for safety reasons, some cables have an additional layer of braided self-winding tubing added to improve the safety and reliability of cable operation. Therefore, the braided self-winding tubing needs to be heat-cut according to the cable length. However, current heat-cutting devices have a problem: the tubing is prone to deformation and adhesion after heat cutting, resulting in increased labor costs. Summary of the Invention

[0003] Purpose of the invention: This application provides a hot-cutting device for rolled tubes, which aims to solve the technical problem that rolled tubes are prone to deformation and adhesion after hot cutting.

[0004] Technical solution: This application provides a hot-cutting device for coiled pipes, used for cutting coiled pipes, including:

[0005] Main framework;

[0006] Multiple positioning elements are disposed on the main frame. The multiple positioning elements extend along a first direction and are spaced apart in the first direction. The positioning elements have a first surface and a second surface that are opposite to each other. The positioning elements are used to pass through the tube so that the tube is wound around the positioning element. At least a portion of the tube is located on the first surface, and at least another portion of the tube is located on the second surface.

[0007] A hot-cutting module is disposed between two adjacent positioning members, and the hot-cutting module is used to cut the coil tube.

[0008] Beneficial Effects: The hot-cutting device for coiled tubes according to embodiments of this application includes a main frame, multiple positioning members, and a hot-cutting module. The multiple positioning members are disposed on the main frame, extending along a first direction and spaced apart. Each positioning member has a first surface and a second surface facing away from each other. The positioning members are used to pass through the coiled tube so that the coiled tube is wound around the positioning member, with at least a portion of the coiled tube located on the first surface and at least another portion located on the second surface. Winding the coiled tube around the positioning member effectively prevents deformation of the coiled tube. The coiled tube being positioned on the inner and outer walls of the positioning member avoids contact between the coiled tubes, preventing them from sticking together or producing wire-like phenomena during the hot-cutting process. The use of positioning members effectively reduces labor costs, eliminating the need for manual tearing of the sticky parts of the coiled tube. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of a tube hot-cutting device according to an embodiment of this application;

[0011] Figure 2 This is a schematic diagram of the structure of a hot-cutting device for a rolled tube according to another embodiment of this application;

[0012] Figure 3 This is a schematic diagram of the structure of a tube hot-cutting device according to another embodiment of this application;

[0013] Figure 4 This is a schematic diagram of the structure of a heat-cutting module according to an embodiment of this application;

[0014] Figure 5 This is a schematic diagram of the structure of a first feeding mechanism according to an embodiment of this application.

[0015] Reference numerals: 1. Main frame; 2. Positioning component; 20. First surface; 21. Second surface; 3. Hot cutting module; 4. Feeding module; 5. First sensor; 7. Lifting mechanism; 8. Second sensor; 9. Unloading mechanism; 30. Resistance wire; 40. First feeding mechanism; 41. Second feeding mechanism; 70. Cylinder; 71. Telescopic shaft; 90. Frame; 91. Shaft; 400. First driving component; 401. Synchronous pulley; 402. Synchronous belt; 403. Rotating shaft; 404. Conveyor belt; 410. Roller; 411. Second driving component; X, First direction; Y, Second direction. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0017] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0018] With the continuous development of automobiles and the rapid increase in electric vehicles, the amount of cables used has also increased, leading to more stringent requirements for cable protection and a greater need for lightweight designs. Currently, for safety reasons, some cables have an additional layer of braided self-winding tubing added to improve the safety and reliability of cable operation. Therefore, the braided self-winding tubing needs to be heat-cut according to the cable length. However, current heat-cutting devices have a problem: the tubing is prone to deformation and adhesion after heat cutting, resulting in increased labor costs.

[0019] In view of this, this application provides a hot-cutting device for coiled tubes, including a main frame, multiple positioning members, and a hot-cutting module. The multiple positioning members are disposed on the main frame, extending along a first direction and spaced apart therefrom. Each positioning member has a first surface and a second surface facing away from each other. The positioning members are used to pass through the coiled tube so that the coiled tube is wound around the positioning member, with at least a portion of the coiled tube located on the first surface and at least another portion located on the second surface. Winding the coiled tube around the positioning member effectively prevents deformation of the coiled tube. The coiled tube being positioned on the inner and outer walls of the positioning member avoids contact between the coiled tubes, preventing them from sticking together or producing wire-like strands during the hot-cutting process. The use of positioning members effectively reduces labor costs, eliminating the need for manual tearing of the sticky parts of the coiled tube.

[0020] The hot-cutting device for coiled tubes of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0021] Figure 1This is a schematic diagram of the structure of a tube hot-cutting device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a hot-cutting device for a rolled tube according to another embodiment of this application; Figure 3 This is a schematic diagram of the structure of a tube hot-cutting device according to another embodiment of this application; Figure 4 This is a schematic diagram of the structure of a heat-cutting module 3 according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a first feeding mechanism 40 according to an embodiment of this application.

[0022] refer to Figures 1 to 5 This application provides a hot-cutting device for coiled tubes, comprising a main frame 1, multiple positioning members 2, and a hot-cutting module 3. The multiple positioning members 2 are disposed on the main frame 1, extending along a first direction X and spaced apart. Each positioning member 2 has a first surface 20 and a second surface 21 facing away from each other. The positioning members 2 are used to pass through the coiled tube so that the coiled tube is wound around the positioning member 2, with at least a portion of the coiled tube located on the first surface 20 and at least another portion located on the second surface 21. Winding the coiled tube around the positioning member 2 effectively prevents deformation of the coiled tube. The coiled tube being positioned on the inner and outer walls of the positioning member 2 avoids contact between the coiled tubes, preventing them from sticking together or producing filaments during the hot-cutting process. The use of the positioning members 2 effectively reduces labor costs, eliminating the need for manual tearing of the sticky parts of the coiled tube.

[0023] For example, the coil is a braided sheath layer, which can protect the cable. Specifically, the braided sheath layer can effectively improve the cable's abrasion resistance, increase the overall strength of the cable, and prevent the cable from loosening. The braided sheath layer is usually made of fibrous materials or synthetic fibers, which may easily melt or deform at high temperatures, leading to adhesion. The positioning member 2 in this embodiment is spiral-shaped. Specifically, the positioning member 2 extends spirally from the inside to the outside in its cross-section. The coil sleeved on the positioning member 2 can maintain the relative positional stability of the coil, avoiding misalignment or detachment of the coil, and effectively preventing deformation of the coil. The positioning member 2 has a first surface 20 and a second surface 21 that are opposite to each other. The first surface 20 can be the inner wall of the positioning member 2, and the second surface 21 can be the outer wall of the positioning member 2. The coil can be wound around the first surface 20 and the second surface 21 of the positioning member 2 to avoid contact between the coils, which can prevent the coils from sticking together or producing wires during the thermal cutting process.

[0024] In some embodiments, the positioning element 2 may be made of metals such as stainless steel or titanium alloy. Stainless steel and titanium alloy have advantages such as wear resistance, rust resistance, and high strength, which help to improve the service life and performance stability of the positioning element 2.

[0025] In some embodiments, the hot-cutting device for coiled tubes includes a feeding mechanism 9 disposed on the main frame 1, which is used to convey the coiled tube to the positioning member 2. The hot-cutting device for coiled tubes also includes a feeding module 4 disposed on the main frame 1. The feeding module 4 includes a first feeding mechanism 40 and a second feeding mechanism 41. The first feeding mechanism 40 is used to convey the coiled tube on one positioning member 2 to an adjacent positioning member 2, and the second feeding mechanism 41 is used to deliver the cut coiled tube on the positioning member 2.

[0026] exist Figure 2 In the illustrated embodiment, the feeding mechanism 9 includes a frame 90 and a shaft 91. The shaft 91 is disposed between the frame 90 and the positioning member 2. The frame 90 is connected to the main frame 1 and is located on the side of the main frame 1 away from the positioning member 2 and the hot-cutting module 3. The frame 90 is used to hold the uncut coiled tube. In the embodiments of this application, the coiled tube can be wound onto the frame 90. The coiled tube is conveyed to the positioning member 2 by the shaft 91 and the first feeding mechanism 40, so that the coiled tube is wound onto the positioning member 2. The shaft 91 and the first feeding mechanism 40 cooperate to realize the conveying and motion control of the coiled tube, which helps to ensure the accurate positioning and stable conveying of the coiled tube, providing a reliable basis for the subsequent cutting operation of the hot-cutting module 3.

[0027] In some embodiments, the working principle of the tube hot-cutting device is as follows: the uncut tube is conveyed to the positioning member 2 by the feeding mechanism 9, and then the first feeding mechanism 40 continues to convey the tube sleeved on one positioning member 2 along the first direction X to the adjacent positioning member 2. When the tube moves to the set position, the hot-cutting module 3 cuts the tube along the gap between the two adjacent positioning members 2. The second feeding mechanism 41 continues to convey the cut tube forward to separate the cut tube from the positioning member 2, making it easier to collect the tube for subsequent processes. With this configuration, the positioning member 2 can effectively prevent the tube from deforming and sticking, eliminating the need for manual tearing of the sticky parts of the tube, thereby simplifying the process and improving production efficiency.

[0028] exist Figure 5 In the illustrated embodiment, the first feeding mechanism 40 includes a first driving member 400, a plurality of synchronous pulleys 401, a synchronous belt 402, a plurality of rotating shafts 403, and a conveyor belt 404. The first driving member 400 is connected to at least one synchronous pulley 401, and at least another synchronous pulley 401 is connected to the rotating shaft 403. The synchronous belt 402 is disposed on the outer periphery of the plurality of synchronous pulleys 401, and the conveyor belt 404 is disposed on the outer periphery of the plurality of rotating shafts 403. The conveyor belt 404 is spaced apart from the positioning member 2. The first driving member 400 is used to drive the synchronous pulleys 401 and the rotating shafts 403 connected to the synchronous pulleys 401 to rotate. The rotating shafts 403 are used to drive the conveyor belt 404 to move the uncut coil on the positioning member 2 along the first direction X.

[0029] For example, multiple synchronous pulleys 401 include a driving pulley and a driven pulley, and multiple rotating shafts 403 include a driving shaft and a driven shaft. A first driving member 400 drives the driving pulley and the synchronous belt 402 connected to the driving pulley to rotate. The synchronous belt 402 drives the driven pulley to rotate. The driven pulley is connected to the driving shaft to drive the driving shaft and the conveyor belt 404 connected to the driving shaft to rotate. The conveyor belt 404 drives the driven shaft to rotate. With this configuration, the conveyor belt 404 can contact the tube on the positioning member 2 and drive the tube to move along the first direction X. This configuration realizes multi-point drive and synchronous transmission to provide a stable conveying process, reduce the sway of the conveyor belt 404, and ensure the stability and balance of the tube during the conveying process.

[0030] exist Figures 1 to 3 In the illustrated embodiment, the hot-cutting device for the rolled tube includes a first sensor 5 and a control module (not shown). The first sensor 5 transmits the position information of the rolled tube to the control module, which then controls the operation of the first feeding module 4 based on the received position information. By controlling the opening and closing times of the first feeding mechanism 40 and the feeding speed, the length of the cut rolled tube can be effectively controlled. The control module receives the position information of the rolled tube and automatically controls the operation of the first driving component 400. Utilizing the first sensor 5 and the control module, the cutting process can be automated, reducing the need for manual operation and improving production efficiency.

[0031] For example, the first drive unit 400 can be a servo motor. A servo motor has rapid response and adjustment capabilities. After receiving instructions from the control module, it can quickly adjust its output torque and speed to adapt to the cutting requirements of coiled tubes of different lengths. This configuration can improve the response speed and efficiency of the cutting process.

[0032] exist Figures 1 to 3 In the illustrated embodiment, the second feeding mechanism 41 includes a roller 410 and a second driving member 411. The roller 410 is connected to the second driving member 411, and the roller 410 is spaced apart from the positioning member 2. The roller 410 is used to feed the cut coiled tube from the positioning member 2. In the embodiments of this application, after the coiled tube wound on multiple positioning members 2 reaches a set position, the control module drives the hot cutting module 3 to cut the coiled tube along the gap between adjacent positioning members 2. The cut coiled tube moves along the first direction X through the roller 410 to separate from the positioning member 2 and proceed to subsequent processes.

[0033] exist Figures 1 to 3In the illustrated embodiment, the hot-cutting device for the rolled tube includes a first sensor 5 and a control module. Exemplarily, the first sensor 5 may be a displacement sensor. The first sensor 5 is used to send the position information of the rolled tube to the control module, which then controls the operation of the second feeding module 4 based on the received position information. The hot-cutting module 3 is allowed to cut the rolled tube by controlling the stop of the second feeding mechanism 41, and after the cutting is complete, the second feeding mechanism 41 is opened to deliver the rolled tube. By receiving the position information of the rolled tube and automatically controlling the operation of the second drive component 411, the control module, utilizing the first sensor 5 and the control module, can automate the cutting process, reducing the need for manual operation and improving production efficiency.

[0034] For example, the second drive unit 411 can be a servo motor, which has fast response and adjustment capabilities. The second drive unit 411 is connected to the roller 410, and by driving the operation of the roller 410, the cut coiled tube on the positioning member 2 is fed out. The servo motor can control the speed and direction of the roller 410 to ensure that the coiled tube separates smoothly from the positioning member 2 and moves along the first direction X for subsequent processes. Through the coiled tube position information received by the control module, the servo motor can accurately drive the operation of the roller 410, ensuring that the coiled tube is accurately separated after cutting and moves along the first direction X as needed, achieving precise feeding.

[0035] exist Figures 1 to 3 In the illustrated embodiment, the hot-cutting device for rolled tubes includes a lifting mechanism 7 connected to the hot-cutting module 3. The lifting mechanism 7 controls the hot-cutting module 3 to move along a second direction Y to cut the rolled tube, where the second direction Y intersects with the first direction X. In embodiments of this application, the first direction X and the second direction Y are perpendicular to each other. By controlling the lifting movement of the lifting mechanism 7, the contact and separation between the hot-cutting module 3 and the rolled tube can be controlled, thus realizing the cutting operation of the rolled tube. By precisely controlling the contact and separation between the hot-cutting module 3 and the rolled tube, the cutting quality and accuracy are ensured. This avoids deformation, sticking, and stringing at the cut point of the rolled tube, improving production quality.

[0036] In some embodiments, the lifting mechanism 7 includes a cylinder 70 and a telescopic shaft 71. The telescopic shaft 71 is connected to the hot-cutting module 3 on the side facing the positioning member 2, and the cylinder 70 is used to control the lifting and lowering of the telescopic shaft 71. In the embodiments of this application, the cylinder 70 is used to control the lifting and lowering movement of the telescopic shaft 71, thereby controlling the movement of the hot-cutting module 3 connected to the telescopic shaft 71 along the second direction Y. By controlling the lifting and lowering movement of the hot-cutting module 3 with the cylinder 70, the contact and separation between the hot-cutting module 3 and the coil tube can be realized. The cylinder 70 has a fast response characteristic and can quickly adjust the lifting and lowering movement of the telescopic shaft 71. According to the received control signal, the cylinder 70 can quickly adjust the lifting speed and position of the telescopic shaft 71 to meet the real-time cutting operation requirements.

[0037] In some embodiments, the tube hot-cutting device includes a second sensor 8 and a control module. Exemplarily, the second sensor 8 may be a displacement sensor. The second sensor 8 is disposed on the hot-cutting module 3 and is used to send the position information of the hot-cutting module 3 to the control module. The control module is used to control the operation of the lifting mechanism 7 based on the received position information of the hot-cutting module 3. Based on the received position information of the hot-cutting module 3, the control module can achieve precise control of the lifting mechanism 7. The control module uses feedback signals to control the lifting mechanism 7, achieving accurate cutting of the tube, thereby improving the accuracy, stability, and production efficiency of the tube cutting.

[0038] exist Figure 5 In the illustrated embodiment, the hot-cutting module 3 includes a resistance wire 30 and a heating controller (not shown). The heating controller heats the resistance wire 30, which is used to cut the rolled tube. The resistance wire 30, acting as a cutting tool, is heated by the heating controller and directly contacts and cuts the rolled tube during the cutting process. Heating the resistance wire 30 raises it to a sufficient temperature to cut the rolled tube, thus achieving the cutting operation. Because the heating and control parameters of the resistance wire 30 can be precisely adjusted, the cutting process can be optimized according to the characteristics of the rolled tube and the cutting requirements. This ensures that the cut edge of the rolled tube is smooth, burr-free, or undamaged, thereby improving the cutting quality.

[0039] In some embodiments, to ensure the safety of hot cutting, a protective cover (not shown) is fitted and fixedly connected to the outer periphery of the main frame 1. The protective cover can prevent material splashing or cutting waste from flying out during operation, and can provide safety protection.

[0040] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0041] The above provides a detailed description of a hot-cutting device for coiled tubes provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hot-cutting device for coiled pipes, characterized in that, include: Main framework (1); Multiple positioning elements (2) are disposed on the main frame (1). The multiple positioning elements (2) extend along a first direction (X) and are spaced apart in the first direction (X). The positioning elements (2) have a first surface (20) and a second surface (21) that are opposite to each other. The positioning elements (2) are used to pass through the tube so that the tube is wound around the positioning element (2). At least a portion of the tube is located on the first surface (20), and at least another portion of the tube is located on the second surface (21). A hot-cutting module (3) is disposed between two adjacent positioning members (2), and the hot-cutting module (3) is used to cut the coil tube.

2. The hot-cutting device for coiled tubes according to claim 1, characterized in that, The system includes a feeding module (4) disposed on the main frame (1). The feeding module (4) includes a first feeding mechanism (40) and a second feeding mechanism (41). The first feeding mechanism (40) is used to transport the rolled tube on one of the positioning members (2) to the adjacent positioning member (2). The second feeding mechanism (41) is used to send out the cut rolled tube on the positioning member (2).

3. The hot-cutting device for coiled tubes according to claim 2, characterized in that, The first feeding mechanism (40) includes a first driving member (400), a plurality of synchronous pulleys (401), a synchronous belt (402), a plurality of rotating shafts (403), and a conveyor belt (404). The first driving member (400) is connected to at least one of the synchronous pulleys (401), and at least another synchronous pulley (401) is connected to the rotating shaft (403). The synchronous belt (402) is disposed on the outer periphery of the plurality of synchronous pulleys (401), and the conveyor belt (404) is disposed on the outer periphery of the plurality of rotating shafts (403). The conveyor belt (404) is spaced apart from the positioning member (2). The first driving member (400) is used to drive the synchronous pulleys (401) and the rotating shafts (403) connected to the synchronous pulleys (401) to rotate. The rotating shafts (403) are used to drive the conveyor belt (404) to move the uncut coil on the positioning member (2) along the first direction (X).

4. The hot-cutting device for coiled tubes according to claim 2, characterized in that, The second feeding mechanism (41) includes a roller (410) and a second driving member (411). The roller (410) is connected to the second driving member (411). The roller (410) is spaced apart from the positioning member (2). The roller (410) is used to feed the cut tube from the positioning member (2).

5. The hot-cutting device for coiled tubes according to claim 2, characterized in that, It includes a first sensor (5) and a control module. The sensor is used to send the position information of the tube to the control module, and the control module is used to control the operation of the feeding module (4) based on the received position information of the tube.

6. The hot-cutting device for coiled tubes according to claim 1, characterized in that, It includes a lifting mechanism (7) connected to the hot cutting module (3), and the lifting mechanism (7) is used to control the hot cutting module (3) to move along the second direction (Y) to cut the roll tube, the second direction (Y) intersecting the first direction (X).

7. The hot-cutting device for coiled tubes according to claim 6, characterized in that, The lifting mechanism (7) includes a cylinder (70) and a telescopic shaft (71). The telescopic shaft (71) is connected to the heat-cutting module (3) on the side facing the positioning member (2). The cylinder (70) is used to control the lifting of the telescopic shaft (71).

8. The hot-cutting device for coiled tubes according to claim 6, characterized in that, It includes a second sensor (8) and a control module. The second sensor (8) is disposed on the heat-cutting module (3). The second sensor (8) is used to send the position information of the heat-cutting module (3) to the control module. The control module is used to control the operation of the lifting mechanism (7) based on the received position information of the heat-cutting module (3).

9. The hot-cutting device for coiled tubes according to claim 1, characterized in that, The hot cutting module (3) includes a resistance wire (30) and a heating controller. The heating controller is used to heat the resistance wire (30), and the resistance wire (30) is used to cut the coiled tube.

10. The hot-cutting device for coiled tubes according to claim 1, characterized in that, It includes a feeding mechanism (9) disposed on the main frame (1), the feeding mechanism (9) being used to transport the coil to the positioning member (2).

11. The hot-cutting device for coiled tubes according to claim 10, characterized in that, The feeding mechanism (9) includes a frame (90) and a shaft (91). The frame (90) is used to provide the coil to the positioning member (2). The shaft (91) is disposed between the frame (90) and the positioning member (2) and is used to transport the coil to the positioning member (2).

12. The hot-cutting device for coiled tubes according to claim 1, characterized in that, The positioning element (2) is spiral-shaped.

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