Fire-resistant cable and frame-type stranding machine for producing fire-resistant cable

Abstract

The invention relates to the technical field of cable production, in particular to a fire-resistant cable and a frame-type stranding machine for producing the fire-resistant cable, which comprises a frame body, a plurality of wire coils are detachably arranged on the frame body, the frame body comprises a plurality of circumferentially arranged mounting bins, a plurality of turning mechanisms are movably arranged in the mounting bins, and the turning mechanisms are used for winding copper wires on the wire coils to bend the copper wires. A plurality of driving mechanisms are fixedly arranged in the mounting bin and used for controlling the direction changing mechanism to move in the mounting bin so as to change the position of the direction changing mechanism. The direction changing mechanism is arranged in the mounting bin, the driving mechanism is used for controlling the winding rod to move, so that the bending angle of copper wires wound around the winding rod is changed, the winding rod can gradually move towards the side close to the wire outlet end when the copper wires on the wire coil are fewer and fewer through detection of the tension sensor, and the winding effect is improved. Therefore, the bending angle of the copper wire is increased, the lack of pay-off tension due to the reduction of the copper wire and the reduction of the diameter of the wire coil is compensated, the copper wire is prevented from loosening, and the quality of the stranded wire is improved.

Description

Technical Field

[0001] This invention relates to the field of cable production technology, specifically to a fire-resistant cable and a frame-type stranding machine for its production. Background Technology

[0002] Cables, as conductors for transmitting electrical energy, are essential components in various scenarios such as residential and industrial electricity use. During the cable production process, a frame stranding machine is used to twist multiple copper wires together as the main conductive component of the cable, ensuring the quality of the cable after production.

[0003] In existing technology, frame-type stranding machines typically consist of a wire reel frame, a stranding mechanism, a traction mechanism, and a take-up mechanism. During use, the copper wire reel is first installed on the reel frame, and several copper wires are extended into the stranding mechanism. The rotation of the reel frame causes the copper wires to twist together, and finally, the traction mechanism transports them to the take-up mechanism to complete the winding operation, facilitating subsequent processing.

[0004] However, during the operation of the stranding machine, the amount of copper wire on the spool decreases, and the diameter of the coil formed by the copper wire also decreases. This causes a continuous decrease in the directional tension of the copper wire, which may lead to loose strands during stranding due to insufficient tension, thus affecting the quality of the stranded wire and consequently impacting the conductivity of the cable. Therefore, this invention proposes a fire-resistant cable and a frame-type stranding machine for its production to effectively solve the above-mentioned drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide a fire-resistant cable and a frame-type stranding machine for its production, in order to solve the problems mentioned in the background art.

[0006] The present invention is achieved through the following technical solution: a fire-resistant cable, comprising a cable body, wherein the cable body comprises a conductor layer, an insulation layer, a fire-resistant layer, an armor layer and a protective layer arranged sequentially from the inside to the outside; The conductor layer is formed by stranding multiple copper wires and is made of high-purity oxygen-free copper. The insulation layer is made of cross-linked polyethylene material. The fire-resistant layer is made of mica material. The armor layer is made of hot-dip galvanized steel material. The protective layer is made of low-smoke halogen-free flame-retardant and weather-resistant polyolefin material.

[0007] Optionally, both the refractory layer and the armor layer are strip structures. The refractory layer is formed by tightly wrapping refractory mica tape around the outside of the insulation layer, and the armor layer is formed by wrapping hot-dip galvanized steel strip around the outside of the refractory layer.

[0008] The present invention also proposes a frame-type stranding machine, applicable to the above-mentioned fire-resistant cable, including a frame, on which a plurality of wire reels are detachably provided, and copper wires constituting the conductor layer are wound on the wire reels. The frame includes a plurality of circumferentially arranged mounting chambers, and a plurality of wire reels located in the same mounting chamber are arranged along the length direction of the frame. The installation chamber is equipped with several reversing mechanisms, and each of the reversing mechanisms and the wire reels are arranged in a one-to-one correspondence. The reversing mechanisms are used to allow the copper wires on the wire reels to bend around. The installation chamber is fixedly equipped with several driving mechanisms, and the driving mechanisms and the reversing mechanisms correspond one-to-one. The driving mechanisms are used to control the reversing mechanisms to move within the installation chamber to change the position of the reversing mechanisms. When the reversing mechanism moves toward the side of the wire reel closer to the outlet end of the mounting chamber, the greater the bending angle of the copper wire around the reversing mechanism, the greater the wire tension on the copper wire on the reel.

[0009] Optionally, the reversing mechanism is located on the side of the cable reel facing the installation compartment, and the horizontal height of several reversing mechanisms located in the same installation compartment increases sequentially, with the highest reversing mechanism being closer to the cable outlet end of the installation compartment.

[0010] Optionally, the reversing mechanism includes a first winding rod that is slidably disposed in the mounting chamber along the length of the frame, and the driving mechanism includes a linear slide fixedly mounted on the bottom wall of the mounting chamber. The linear slide is used to drive the first winding rod to move along the length of the frame to change the bending angle of the copper wire on the coil.

[0011] Optionally, the first winding rod is cylindrical in shape, and both ends of the first winding rod are rotatably fitted with sliders. The sliders are square in shape. The inner sidewall of the mounting chamber is fixed with a movable chamber along its own length for the sliders to be embedded and slidably connected. A slide seat is slidably provided on the linear slide table, and a connecting seat is protruding outward on the slide seat. The first winding rod passes through the connecting seat and is rotatably connected with the connecting seat.

[0012] Optionally, the outer wall of the first winding rod has two first flanges, which are symmetrically distributed, and the copper wire on the coil is wound between the two first flanges.

[0013] Optionally, the reversing mechanism includes a second winding rod and a third winding rod rotatably disposed within the mounting chamber. The second winding rod and the third winding rod are fixedly connected by a connecting rod. The driving mechanism includes a driving motor. One end of the second winding rod is coaxially rotatably mounted on the output shaft of the driving motor. The driving motor is used to drive the second winding rod to rotate in order to change the position of the third winding rod within the mounting chamber.

[0014] Optionally, a sliding groove is provided on the inner side wall of the installation chamber for sliding connection of the end of the third winding rod. The sliding groove is arc-shaped and the sliding groove and the second winding rod are concentrically distributed. One end of the sliding groove is at the same height as the second winding rod and is away from the outlet end of the installation chamber. The other end of the sliding groove is located directly above the second winding rod and close to the outlet end of the installation chamber. When the third winding rod is located in the groove at one end away from the wire outlet of the mounting chamber, the copper wire on the coil is wound around the third winding rod; When the third winding rod is located in the groove near the end of the mounting chamber, the copper wire on the coil is wound around the second winding rod.

[0015] Optionally, the second winding rod has two symmetrical second flanges on its outer side, and the third winding rod has two symmetrical third flanges on its outer side. There are two connecting rods, and the two ends of the connecting rods are respectively fixedly connected to the second flanges and the third flanges. The copper wire on the coil is wound between the two second flanges or between the two third flanges.

[0016] Compared with the prior art, the present invention provides a fire-resistant cable and a frame-type stranding machine for its production, which has the following advantages: 1. This invention provides a reversing mechanism for winding copper wire within the installation chamber. A drive mechanism controls the movement of the winding rod to change its position, thereby altering the bending angle of the copper wire as it passes over the winding rod. When the diameter of the coil decreases due to the reduced amount of copper wire detected by a tension sensor, the winding rod gradually moves towards the side closer to the output end, increasing the bending angle of the copper wire. This compensates for the lost tension due to the reduced copper wire and smaller coil diameter, preventing the copper wire from slackening and improving the quality of the stranded wire. 2. In this invention, the different winding rods are at different heights, so that the wires on different coils will extend to the wire outlet of the frame from different horizontal heights, reducing the occurrence of copper wires tangling together. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cable structure of the present invention; Figure 2 This is a schematic diagram of the frame-type stranding machine structure of the present invention; Figure 3 This is a side sectional view of the stranding machine according to Embodiment 2 of the present invention; Figure 4 This is a side sectional view of the installation compartment in Embodiment 2 of the present invention; Figure 5 This is a front sectional view of the frame in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the reversing mechanism and driving mechanism in Embodiment 2 of the present invention; Figure 7for Figure 5 Enlarged structural diagram at point A in the middle; Figure 8 This is a schematic diagram of the reversing mechanism and driving mechanism in Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the reversing mechanism structure in Embodiment 3 of the present invention.

[0018] In the diagram: 1. Cable body; 101. Conductor layer; 102. Insulation layer; 103. Fire-resistant layer; 104. Armor layer; 105. Protective layer; 2. Frame; 201. Installation compartment; 202. Movable compartment; 203. Slide groove; 3. Cable reel; 4. First winding rod; 401. Slider; 5. Linear slide; 501. Slide seat; 502. Connecting seat; 6. Second winding rod; 7. Third winding rod; 8. Connecting rod; 9. Drive motor. Detailed Implementation

[0019] 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.

[0020] Example 1: Please refer to Figure 1 This application provides a fire-resistant cable, which includes a cable body 1. The cable body 1 includes a conductor layer 101, an insulation layer 102, a fire-resistant layer 103, an armor layer 104, and a protective layer 105 arranged sequentially from the inside to the outside.

[0021] The conductor layer 101 is formed by stranding multiple copper wires and is made of high-purity oxygen-free copper, which has a higher conductivity than ordinary electrolytic copper and can reduce line loss during current transmission. The insulation layer 102 is made of cross-linked polyethylene material, which has insulation and high temperature resistance, and can withstand the rated voltage for a long time to avoid leakage and short circuit. The fire-resistant layer 103 is made of mica material with a mica content of not less than 90% and a temperature resistance limit of 1200℃. The armor layer 104 is made of hot-dip galvanized steel material. Steel material has high strength and can play a good protective role for the inner layer. The hot-dip galvanized layer can isolate moisture and prevent the steel material from rusting. The protective layer 105 is made of low-smoke halogen-free flame-retardant and weather-resistant polyolefin material, which has wear-resistant and corrosion-resistant properties.

[0022] On the other hand, both the fire-resistant layer 103 and the armor layer 104 have a strip structure. The fire-resistant layer 103 is formed by tightly wrapping fire-resistant mica tape around the outside of the insulation layer 102. The mica tape is wrapped around the outside of the insulation layer 102 using an overlapping wrapping process to avoid gaps and improve the fire protection effect. The armor layer 104 is formed by wrapping hot-dip galvanized steel tape around the outside of the fire-resistant layer 103. The hot-dip galvanized copper tape is wrapped around the outside of the fire-resistant layer 103 using a double-layer gap wrapping process to provide good protection for the inner layer and improve the overall strength of the cable.

[0023] Example 2: Please refer to Figure 2 - Figure 7 This application provides a frame-type stranding machine applicable to a fire-resistant cable proposed in Embodiment 1. It includes a frame 2, on which a plurality of coils 3 are detachably provided. Copper wires constituting a conductor layer 101 are wound on the coils 3. The frame 2 includes a plurality of circumferentially arranged mounting chambers 201, and the plurality of coils 3 located in the same mounting chamber 201 are arranged along the length direction of the frame 2.

[0024] The left and right side walls of the installation chamber 201 are parallel to each other, and the width of the installation chamber 201 is slightly larger than the width of the wire reel 3. The two ends of the wire reel 3 are rotatably connected to the left and right side walls of the installation chamber 201. Copper wires on several wire reels 3 extend from the wire outlet end of the frame 2 and are twisted together to form a conductor layer 101.

[0025] In this embodiment, several reversing mechanisms are movably installed within the installation chamber 201. These reversing mechanisms correspond one-to-one with several wire reels 3. The reversing mechanisms are used to allow the copper wires on the wire reels 3 to bend. Each reversing mechanism includes a winding rod movably installed within the installation chamber 201. The copper wires on the wire reels 3 pass around the outside of the winding rod and then extend from the outlet end of the frame 2, giving the copper wires an initial bending angle at the winding rod and providing a certain guiding effect. At this time, the wire tension is appropriate. In contrast, without a winding rod, the wire tension in a stranding machine is entirely passively determined by the wire reel 3's wire feeding state and subsequent traction equipment, resulting in large tension fluctuations and easily causing quality problems such as uneven strand pitch, broken wires, and loose strands.

[0026] As the stranding machine runs, the amount of copper wire on the coil 3 decreases, resulting in a reduction in the diameter of the coil on the coil 3. At this time, the bending angle of the copper wire when it passes around the winding rod will decrease, which will reduce the tension of the copper wire when it is released. This may lead to loose strands or loose strands during the stranding process.

[0027] Therefore, in this embodiment, a plurality of driving mechanisms are fixedly installed inside the mounting chamber 201. These driving mechanisms correspond one-to-one with a plurality of reversing mechanisms. The driving mechanisms control the reversing mechanisms to move within the mounting chamber 201 to change their positions. By changing the position of the winding rod in the reversing mechanism, the bending angle of the copper wire is changed. This allows the reversing mechanism to move towards the side of the coil 3 closer to the output end of the mounting chamber 201 when the diameter of the copper wire coil on the coil 3 decreases, thus increasing the bending angle of the copper wire to compensate for the missing wire tension. This makes the tension more stable during the copper wire stranding process and improves the stranding quality.

[0028] Furthermore, the reversing mechanism is located on the side of the coil 3 facing the mounting chamber 201. The horizontal heights of several reversing mechanisms within the same mounting chamber 201 increase sequentially, with the highest reversing mechanism being closest to the outlet end of the mounting chamber 201. Therefore, the copper wires on each coil 3 are positioned at different horizontal heights when they pass over the reversing mechanism, thus preventing tangling that could occur if all copper wires extend from the same horizontal height to the outlet end of the mounting chamber 201.

[0029] Specifically, the reversing mechanism includes a first winding rod 4 that is slidably disposed in the mounting chamber 201 along the length of the frame 2, and the driving mechanism includes a linear slide 5 fixedly installed on the bottom wall of the mounting chamber 201. The linear slide 5 is used to drive the first winding rod 4 to move along the length of the frame 2 to change the bending angle of the copper wire on the coil 3.

[0030] The first winding rod 4 has a cylindrical rod structure. A slide seat 501 is slidably mounted on the linear slide table 5. A connecting seat 502 protrudes outward from the slide seat 501. The first winding rod 4 passes through the connecting seat 502 and is rotatably connected to it. The linear slide table 5 is distributed along the length of the mounting chamber 201 so that it can control the first winding rod 4 to move horizontally. During the unwinding process of the copper wire, the first winding rod 4 can be driven to rotate, thereby reducing friction and wear on the copper wire.

[0031] On the other hand, both ends of the first winding rod 4 are rotatably fitted with sliders 401. The sliders 401 have a square structure, and a movable chamber 202 is fixed on the inner wall of the mounting chamber 201 along its length for the sliders 401 to be inserted into and slidably connected. The shape of the sliders 401 and the shape of the movable chamber 202 are adapted to each other so that the sliders 401 can slide stably within the movable chamber 202, making the first winding rod 4 more stable during movement and preventing the first winding rod 4 from shaking.

[0032] It should be noted that a ZLBU-1 miniature tension sensor is fixedly installed in the mounting chamber 201 between the first winding rod 4 and the coil 3. The copper wire naturally adheres to the detection wheel of the tension sensor. An external Siemens S7-1200 PLC controller, connected to the tension sensor signal, is also provided. The PLC control is also signal-connected to the linear slide 5. The linear slide 5 is a HIWIN MGN12H miniature slide, capable of precise control of the horizontal displacement of the first winding rod 4. The tension sensor detects the tension signal of the copper wire. After the signal is transmitted to the controller, the detected value is compared with the initial set value. When a difference occurs, the controller controls the linear slide 5 to move, causing the linear slide 5 to control the first winding rod 4 to slide horizontally. This correlates the movement distance of the first winding rod 4 with the change in the diameter of the copper wire coil on the coil 3, ensuring stable copper wire tension during equipment operation.

[0033] Furthermore, the outer wall of the first winding rod 4 has two first flanges, which are symmetrically distributed. The copper wire on the coil 3 is wound between the two first flanges to limit and guide the copper wire and prevent the copper wire from deviating from its transport path.

[0034] Example 3: Please refer to Figure 8 and Figure 9 This application provides a frame-type stranding machine applicable to a fire-resistant cable as described in Embodiment 1. The difference between this embodiment and Embodiment 2 lies in the following: the reversing mechanism includes a second winding rod 6 and a third winding rod 7 rotatably disposed within the mounting chamber 201. The second winding rod 6 and the third winding rod 7 are fixedly connected by a connecting rod 8. The driving mechanism includes a drive motor 9. One end of the second winding rod 6 is coaxially rotatably mounted on the output shaft of the drive motor 9. The drive motor 9 drives the second winding rod 6 to rotate, thereby changing the position of the third winding rod 7 within the mounting chamber 201. When the drive motor 9 drives the second winding rod 6 to rotate, the third winding rod 7 can perform circular motion around the second winding rod 6, thereby changing the position of the third winding rod 7 and causing a change in the bending angle of the copper wire.

[0035] Specifically, both the second winding rod 6 and the third winding rod 7 are cylindrical rod structures. A sliding groove 203 is provided on the inner wall of the mounting chamber 201 for sliding connection of the end of the third winding rod 7. The sliding groove 203 is arc-shaped and concentrically distributed with the second winding rod 6. One end of the sliding groove 203 is at the same height as the second winding rod 6 and away from the wire outlet end of the mounting chamber 201, while the other end of the sliding groove 203 is located directly above the second winding rod 6 and close to the wire outlet end of the mounting chamber 201. Therefore, when the third winding rod 7 is located at the end of the slide groove 203 away from the outlet end of the mounting chamber 201, the copper wire on the coil 3 is wound around the third winding rod 7, and at this time, the bending angle of the copper wire is the initial angle. When the drive motor 9 starts to drive the second winding rod 6 to rotate, causing the third winding rod 7 to move within the slide groove 203, the copper wire will have two bending angles at the third winding rod 7 and the second winding rod 6. At this time, both bending angles are larger than the initial bending angle, so as to better compensate for the tension loss of copper wire and make the copper wire conveying process more stable. When the third winding rod 7 moves to the end of the slide groove 203 near the outlet end of the mounting chamber 201, the copper wire on the coil 3 is almost gone. The copper wire on the coil 3 is then wound around the second winding rod 6 and conveyed vertically downwards towards the second winding rod 6 for stable conveying, thus playing a guiding role.

[0036] The drive motor 9 is a Panasonic A6 series servo motor, equipped with a Panasonic MADLN15SE servo driver, to precisely control the speed and direction of the drive motor 9. The drive motor 9 is connected to the controller. When the tension sensor detects a tension signal, the PLC controller analyzes and compares the signal, and then controls the drive motor 9 to start or stop, causing the third winding rod 7 to rotate around the second winding rod 6, changing the position of the third winding rod 7, thereby changing the bending angle of the copper wire and making the copper wire unwinding tension more stable.

[0037] Furthermore, the second winding rod 6 has two symmetrically arranged second flanges on its outer side, and the third winding rod 7 has two symmetrically arranged third flanges on its outer side. There are two connecting rods 8, with their ends fixedly connected to the second and third flanges respectively. The copper wire on the coil 3 is wound between the two second flanges or the two third flanges. This further prevents the copper wire from shifting when wound on the second winding rod 6 or the third winding rod 7, improving the stability of the copper wire stranding process.

[0038] The working principle and usage process of this invention are as follows: During use, the copper wires on the coil 3 are wound around the first winding rod 4, the second winding rod 6, and the third winding rod 7, and then extend from the outlet end of the mounting chamber 201. The twisting operation is achieved by rotating the stranding machine and the winch. During the twisting process, the number of copper wires on the coil 3 decreases, causing the diameter of the copper wire coil to become smaller. At this time, the tension of the copper wire decreases. The tension sensor continuously transmits signals to the controller. After analyzing and comparing the signals, the controller operates the linear slide 5 or the drive motor 9, constantly changing the positions of the first winding rod 4 and the third winding rod 7. This causes the bending angle of the copper wire to increase as the diameter of the copper wire coil decreases, compensating for the lost tension and making the tension more stable during the twisting process, thus improving the quality of the twisted wire.

[0039] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire-resistant cable, comprising a cable body, characterized in that: The cable body includes, from the inside out, a conductor layer, an insulation layer, a fire-resistant layer, an armor layer, and a protective layer; The conductor layer is formed by stranding multiple copper wires and is made of high-purity oxygen-free copper. The insulation layer is made of cross-linked polyethylene material. The fire-resistant layer is made of mica material. The armor layer is made of hot-dip galvanized steel material. The protective layer is made of low-smoke halogen-free flame-retardant and weather-resistant polyolefin material.

2. The fire-resistant cable according to claim 1, characterized in that: Both the refractory layer and the armor layer are strip structures. The refractory layer is formed by tightly wrapping refractory mica tape around the outside of the insulation layer, and the armor layer is formed by wrapping hot-dip galvanized steel strip around the outside of the refractory layer.

3. A frame-type stranding machine, applicable to a fire-resistant cable as described in any one of claims 1 or 2, comprising a frame, wherein a plurality of reels are detachably mounted on the frame, and copper wire constituting a conductor layer is wound on the reels, characterized in that: The frame includes several circumferentially arranged installation compartments, and several wire reels located in the same installation compartment are arranged along the length of the frame. The installation chamber is equipped with several reversing mechanisms, and each of the reversing mechanisms and the wire reels are arranged in a one-to-one correspondence. The reversing mechanisms are used to allow the copper wires on the wire reels to bend around. The installation chamber is fixedly equipped with several driving mechanisms, and the driving mechanisms and the reversing mechanisms correspond one-to-one. The driving mechanisms are used to control the reversing mechanisms to move within the installation chamber to change the position of the reversing mechanisms. When the reversing mechanism moves toward the side of the wire reel closer to the outlet end of the mounting chamber, the greater the bending angle of the copper wire around the reversing mechanism, the greater the wire tension on the copper wire on the reel.

4. A frame-type stranding machine according to claim 3, characterized in that: The reversing mechanism is located on the side of the cable reel facing the installation chamber. The horizontal height of several reversing mechanisms located in the same installation chamber increases sequentially, with the highest reversing mechanism being closer to the cable outlet end of the installation chamber.

5. A frame-type stranding machine according to claim 4, characterized in that: The reversing mechanism includes a first winding rod that is slidably disposed in the mounting chamber along the length of the frame. The driving mechanism includes a linear slide fixedly installed on the bottom wall of the mounting chamber. The linear slide is used to drive the first winding rod to move along the length of the frame to change the bending angle of the copper wire on the coil.

6. A frame-type stranding machine according to claim 5, characterized in that: The first winding rod is cylindrical in shape. Both ends of the first winding rod are rotatably fitted with sliders. The sliders are square in shape. The inner side wall of the mounting chamber is fixed with a movable chamber along its own length for the sliders to be embedded and slidably connected. A slide seat is slidably provided on the linear slide table. A connecting seat protrudes outward from the slide seat. The first winding rod passes through the connecting seat and is rotatably connected to the connecting seat.

7. A frame-type stranding machine according to claim 6, characterized in that: The outer wall of the first winding rod has two first flanges, which are symmetrically distributed, and the copper wire on the coil is wound between the two first flanges.

8. A frame-type stranding machine according to claim 4, characterized in that: The reversing mechanism includes a second winding rod and a third winding rod rotatably disposed within the mounting chamber. The second winding rod and the third winding rod are fixedly connected by a connecting rod. The driving mechanism includes a driving motor. One end of the second winding rod is coaxially rotatably mounted on the output shaft of the driving motor. The driving motor is used to drive the second winding rod to rotate in order to change the position of the third winding rod within the mounting chamber.

9. A frame-type stranding machine according to claim 8, characterized in that: The inner sidewall of the installation chamber is provided with a sliding groove for sliding connection of the end of the third winding rod. The sliding groove is arc-shaped and the sliding groove and the second winding rod are concentrically distributed. One end of the sliding groove is at the same height as the second winding rod and is away from the wire outlet end of the installation chamber. The other end of the sliding groove is located directly above the second winding rod and close to the wire outlet end of the installation chamber. When the third winding rod is located in the groove at one end away from the wire outlet of the mounting chamber, the copper wire on the coil is wound around the third winding rod; When the third winding rod is located in the groove near the end of the mounting chamber, the copper wire on the coil is wound around the second winding rod.

10. A frame-type stranding machine according to claim 9, characterized in that: The second winding rod has two symmetrical second flanges on its outer side, and the third winding rod has two symmetrical third flanges on its outer side. There are two connecting rods, and the two ends of the connecting rods are fixedly connected to the second flanges and the third flanges, respectively. The copper wire on the coil is wound between the two second flanges or between the two third flanges.

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