Wire twister for heat tracing band production

Abstract

The invention provides a wire twister for heat tracing band production, and belongs to the technical field of heat tracing band production equipment. The wire twisting machine comprises a wire separating guide mechanism and a wire collecting and gathering mechanism which are sequentially arranged in the conveying direction of a heat tracing band, the wire separating guide mechanism is used for guiding a plurality of single wires to the wire collecting and gathering mechanism, and the wire collecting and gathering mechanism is used for gathering and twisting the plurality of single wires; the branching guide mechanism comprises a branching disc, a plurality of groups of threading holes are formed in the circumferential direction of the branching disc, a wire guide assembly is arranged in the branching disc, the wire guide assembly comprises two groups of limiting wire guide rollers, and the distance between the two groups of limiting wire guide rollers is adjustable so as to adapt to single wires with different diameters; the wire collecting and gathering mechanism comprises a gathering horn, wire anti-abrasion rollers and an oil storage pipe, a plurality of sets of wire anti-abrasion rollers are arranged in the circumferential direction of the gathering horn, and single wires are guided into the gathering horn through the wire anti-abrasion rollers. The invention particularly provides a wire twisting machine for heat tracing band production, which can ensure the wire twisting path of a single wire and avoid deviation and abrasion of the single wire.

Description

Technical Field

[0001] This invention belongs to the technical field of heat tracing equipment, specifically referring to a wire twisting machine for heat tracing production. Background Technology

[0002] Heat tracing cables are key temperature control components for industrial pipeline insulation, equipment antifreeze, and pipeline heat tracing. The stranding machine is the core equipment in their production, enabling the stranding of single wires such as nickel-chromium alloy heating wire and copper core wire. During heat tracing cable production, multiple single wires are dispersed and guided by a wire distributor before being centrally conveyed to the stranding nozzle. The rotation of the wire distributor completes the precise stranding of these multiple single wires. The conveying and guiding accuracy and surface integrity of the single wires directly determine the heating stability, mechanical properties, and service life of the heat tracing cable.

[0003] In existing cable tracing production machines, when a single wire converges from the distributor to the twisting flare, it enters the flare at an angle, thus forming a hard contact point with the edge / inner wall of the flare inlet. Under the action of traction force, the single wire continuously slides against the contact point. The radial component force generated by the inclination also increases the contact normal pressure, resulting in severe sliding friction. This can easily cause scratches on the surface of the single wire, peeling of the plating, and even micro-cracks in the ultra-fine heating wire. This leads to uneven resistance of the heating wire, reduced conductivity of the core wire, and ultimately quality problems such as local overheating and deviation in heating power of the cable tracing.

[0004] In addition, existing wire distribution reels often have fixed-diameter holes for single wires to pass through. However, the diameters of single wires such as nickel-chromium alloy heating wires and copper core wires vary greatly, and the holes cannot be precisely matched with single wires of different diameters. When the wire distribution reel rotates and twists at high speed, the single wires are prone to radial displacement within the holes, making it impossible to transport them along the preset path. This results in uneven twisting pitch of multiple single wires, off-center cores, and loose strands. Furthermore, the displaced single wires will generate additional friction with the hole wall, further aggravating surface damage to the single wires. At the same time, frequent shutdowns are required to replace wire distribution reels that are compatible with different single wire diameters, significantly reducing production efficiency. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a twisting machine for producing heat tracing tape, so as to at least partially solve the problems mentioned in the background art.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a twisting machine for producing heat tracing tape, comprising a wire guiding mechanism and a wire gathering mechanism arranged sequentially along the conveying direction of the heat tracing tape. The wire guiding mechanism is used to guide multiple single wires to the wire gathering mechanism, and the wire gathering mechanism is used to converge and twist the multiple single wires. The wire guiding mechanism includes a wire separating disk with multiple sets of wire-passing holes circumferentially for threading single wires. The wire separating disk is provided with a wire guide assembly, which is provided with multiple sets corresponding to the wire-passing holes. The wire guide assembly includes two sets of limiting wire rollers, and the distance between the two sets of limiting wire rollers is adjustable to adapt to single wires of different diameters. The wire gathering mechanism includes a gathering horn, a wire anti-wear roller, and an oil storage pipe. The wire anti-wear roller is located on one side of the wire inlet of the gathering horn and is arranged in multiple sets along the circumference of the gathering horn. The single wire is guided into the gathering horn by the wire anti-wear roller, and a tension along the radial direction of the gathering horn is applied to the wire anti-wear roller during conveying to drive the wire anti-wear roller to move radially along the gathering horn. The wire anti-wear roller has a lubrication cavity, and a lubrication hole is opened on one side wall of the lubrication cavity. The oil storage pipe has an oil cavity, and an oil guide pipe is slidably arranged through the side wall of the oil cavity. The oil guide pipe is fixedly connected to the wire anti-wear roller, and the interior of the oil guide pipe is connected to the lubrication cavity. The oil guide pipe is configured to slide in the oil cavity driven by the tension of the single wire along with the wire anti-wear roller to communicate with the interior of the oil cavity.

[0007] Furthermore, a return spring is sleeved on the outside of the oil guide pipe. The two ends of the return spring are fixedly connected to the oil storage pipe and the anti-wear roller of the wire, respectively. When the single wire is stopped from being conveyed, there is no longer a single wire acting on the anti-wear roller of the wire. The return spring can drive the oil guide pipe to reset, so that the oil guide pipe is disconnected from the oil cavity and the lubricating oil is prevented from leaking.

[0008] Furthermore, a partition is fixedly installed inside the oil cavity, dividing the oil cavity into a first oil storage channel and a second oil storage channel. A first lifting groove is formed on the partition, and a second lifting groove corresponding to the first lifting groove is formed on the side wall of the oil cavity. The oil guide pipe is slidably disposed inside the second lifting groove, and an oil inlet hole is formed on the side wall of the oil guide pipe. In the initial state, the oil inlet hole is exactly located inside the second lifting groove and is blocked by the side wall of the second lifting groove, so that the oil cavity is disconnected from the oil guide pipe. A sealing component is provided at the upper end of the oil guide pipe, and the sealing component is used to block the first lifting groove and the second lifting groove.

[0009] Furthermore, the sealing assembly includes a first sealing plate, a second sealing plate, and a connecting column. The connecting column is fixedly disposed between the first sealing plate and the second sealing plate. The first sealing plate is used to seal the first lifting groove, and the second sealing plate is used to seal the second lifting groove. The connecting column is slidably disposed in the first lifting groove. The diameter of the first lifting groove is larger than the diameter of the connecting column, and the oil guide pipe is adapted to the diameter of the second lifting groove.

[0010] Furthermore, the first sealing plate and the second sealing plate are fixedly provided with sealing pads in the direction of the first lifting groove and the second lifting groove.

[0011] Furthermore, the surface of the anti-wear roller facing the axis of the horn is arc-shaped, which matches the arc-shaped structure of the single wire surface; the arc-shaped surface of the anti-wear roller is always located on the inner side of the horn.

[0012] Furthermore, an adjusting screw is threadedly connected to the side wall of the wire anti-wear roller. A sealing plate is fixedly provided at one end of the adjusting screw located in the lubrication cavity. The sealing plate is configured to slide within the lubrication cavity driven by the adjusting screw. Two sets of adjusting screws are symmetrically provided at both ends of the wire anti-wear roller, and two sets of sealing plates are provided corresponding to the adjusting screws.

[0013] Furthermore, an oil replenishment pipe is fixedly installed on the oil storage pipe.

[0014] Furthermore, the dividing disc has a driving cavity that communicates with the wire threading hole. The wire assembly also includes two symmetrically arranged adjustment assemblies, which are respectively connected to the limiting wire roller. The adjustment assembly includes a drive shaft, a nut sleeve, a threaded rod, and a mounting bracket. The drive shaft is rotatably mounted on the side wall of the driving cavity, and a driving bevel gear is fixedly mounted on the drive shaft. The nut sleeve is rotatably mounted on the side wall of the driving cavity, and a driven bevel gear is fixedly mounted on the nut sleeve. The driven bevel gear meshes with the driving bevel gear. The threaded rod is connected to the nut sleeve by threads. The mounting bracket is fixedly connected to the end of the threaded rod. The limiting wire roller is rotatably mounted on the mounting bracket via a rotating shaft. A guide groove is provided on the side wall of the driving cavity. Guide protrusions are fixed at both ends of the mounting bracket, and the guide protrusions are engaged and slidably disposed within the guide groove.

[0015] Furthermore, the drive shafts of the two sets of adjustment assemblies of each group of wire assemblies rotate synchronously in the same direction, and the thread directions of the nut sleeves and threaded rods of the two sets of adjustment assemblies of each group of wire assemblies are opposite.

[0016] Furthermore, each set of the wire assembly has two adjustment assemblies, namely an upper adjustment assembly and a lower adjustment assembly. A drive motor is fixedly installed on the side wall of the wire distributor, and a central gear and an external gear are rotatably mounted thereon. The central gear is coaxial with the wire distributor, and multiple sets of external gears are provided on the outer periphery of the central gear, and all sets of external gears mesh with the central gear. The multiple sets of external gears are respectively fixedly mounted on the drive shaft of each lower adjustment assembly. The output shaft of the drive motor is fixedly connected to the drive shaft of one set of lower adjustment assemblies. A transmission shaft is rotatably mounted on the wire distributor. The drive shafts of the two sets of adjustment assemblies of one set of wire assemblies are all connected to the transmission shaft via a transmission belt. The drive shafts of the upper adjustment assemblies of two adjacent sets of wire assemblies are connected to each other via a transmission belt.

[0017] Furthermore, a set of core wire holes is provided at the center of the splitter disc, and the core wire holes are coaxially corresponding to the axis of the retractable horn. The central gear is rotatably mounted on the splitter disc via a rotating shaft, and the rotating shaft of the central gear is hollow and connected to the core wire holes.

[0018] The technical solution provided by this invention has the following beneficial effects: (1) Through the adjustable spacing of multiple sets of conductor components, the guide rollers can accurately adapt to single wires of different diameters such as nickel-chromium alloy heating wires and copper core wires, avoid radial deviation of single wires when the wire splitter rotates and twists, ensure that single wires are transported along the preset path, and make the twisting pitch of multiple single wires uniform and the core wires free from eccentricity and loose strands.

[0019] (2) Adjust the conveying path of the single line by setting the anti-wear roller of the conductor to avoid the single line from contacting and rubbing against the edge or inner wall of the folding horn; at the same time, the tension applied to the anti-wear roller of the conductor during the single line conveying drives the anti-wear roller of the conductor and the oil guide pipe to move, realize the supply of lubricating oil on demand, and make the lubricating oil seep out from the lubrication hole to accurately lubricate the single line, transforming the sliding friction between the single line and the anti-wear roller of the conductor into rolling friction after lubrication, greatly reducing the friction and wear of the single line. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a wire twisting machine for producing heat tracing tape, as proposed in an embodiment of the present invention. Figure 2 This is a schematic diagram of the wire gathering mechanism of a wire twisting machine for producing heat tracing tape, as proposed in an embodiment of the present invention. Figure 3 This is a schematic cross-sectional view of the wire gathering mechanism of a wire tracing machine for producing heat tracing cables according to an embodiment of the present invention, taken from the main view direction. Figure 4 for Figure 3 A magnified view of part A; Figure 5 This is a schematic diagram of the drive assembly of the wire guiding mechanism of a wire stranding machine for producing heat tracing tape, according to an embodiment of the present invention. Figure 6 This is a schematic cross-sectional view of the wire gathering mechanism of a wire tracing machine for producing heat tracing cables according to an embodiment of the present invention, taken from the main view direction. Figure 7 This is a front view schematic diagram of the wire guiding mechanism of a wire twisting machine for producing heat tracing tape, according to an embodiment of the present invention. Figure 8 for Figure 7 A magnified view of part B; Figure 9This is a top-view cross-sectional view of the wire guiding mechanism of a wire twisting machine for producing heat tracing tape, as proposed in an embodiment of the present invention. Figure 10 for Figure 9 A magnified view of part C.

[0021] The components include: 1. a wire guiding mechanism; 2. a wire gathering mechanism; 3. a wire dispensing disc; 4. a wire threading hole; 5. a limiting guide roller; 6. a gathering horn; 7. a guide roller to prevent wear; 8. an oil storage pipe; 9. a lubrication chamber; 10. a lubrication hole; 11. an oil chamber; 12. an oil guide pipe; 13. a return spring; 14. a partition plate; 15. a first oil storage channel; 16. a second oil storage channel; 17. a first lifting groove; 18. a second lifting groove; 19. an oil inlet; 20. a first sealing plate; and 21. a second sealing plate. 22. Connecting column; 23. Adjusting screw; 24. Sealing plate; 25. Oil supply pipe; 26. Drive chamber; 27. Drive shaft; 28. Nut sleeve; 29. ​​Threaded rod; 30. Mounting bracket; 31. Driving bevel gear; 32. Driven bevel gear; 33. Guide groove; 34. Guide protrusion; 35. Upper adjusting assembly; 36. Lower adjusting assembly; 37. Drive motor; 38. Center gear; 39. External gear; 40. Drive shaft; 41. Drive belt; 42. Core wire hole.

[0022] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0023] The technical solutions in 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, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0024] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments 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. Therefore, they should not be construed as limitations on the embodiments.

[0025] See Figures 1-3 and Figure 6In this embodiment, the present invention provides a twisting machine for producing heat tracing tape, including a wire guiding mechanism 1 and a wire gathering mechanism 2 arranged sequentially along the conveying direction of the heat tracing tape. The wire guiding mechanism 1 is used to guide multiple single wires to the wire gathering mechanism 2, and the wire gathering mechanism 2 is used to converge and twist the multiple single wires. The wire guiding mechanism 1 includes a wire dispensing disc 3, which has multiple sets of wire-passing holes 4 around its circumference for threading single wires. The wire dispensing disc 3 is provided with a wire guide assembly, which is provided with multiple sets corresponding to the wire-passing holes 4. The wire guide assembly includes two sets of limiting wire rollers 5, and the distance between the two sets of limiting wire rollers 5 is adjustable to adapt to single wires of different diameters. The two sets of limiting wire rollers 5 cooperate to ensure the twisting conveying path of the single wire and prevent the single wire from radially deviating within the wire-passing holes 4. The wire gathering mechanism 2 includes a gathering horn 6, a wire anti-wear roller 7, and an oil reservoir. The tube 8 and the wire anti-wear roller 7 are located on one side of the wire inlet of the gathering horn 6, and multiple sets are arranged along the circumference of the gathering horn 6. The single wire is guided into the gathering horn 6 through the wire anti-wear roller 7, and a radial tension is applied to the wire anti-wear roller 7 during conveying to drive the wire anti-wear roller 7 to move radially along the gathering horn 6. The wire anti-wear roller 7 is provided with a lubrication cavity 9, and a lubrication hole 10 is opened on one side wall of the lubrication cavity 9. Lubricating oil can seep out from the lubrication hole 10 to lubricate the single wire. The oil storage tube 8 is provided with an oil cavity 11, and an oil guide tube 12 is slidably provided through the side wall of the oil cavity 11. The oil guide tube 12 is fixedly connected to the wire anti-wear roller 7, and the interior of the oil guide tube 12 is connected to the lubrication cavity 9. The oil guide tube 12 is configured to slide in the oil cavity 11 driven by the single wire tension along with the wire anti-wear roller to communicate with the interior of the oil cavity 11 and realize the on-demand supply of lubricating oil.

[0026] It should be understood that the cable gathering mechanism 2 also includes a support plate. The gathering horn 6 and the oil storage pipe 8 are both mounted on the support plate, and the support plate provides support for the gathering horn 6 and the oil storage pipe 8.

[0027] See Figure 2 In this embodiment, a reset spring 13 is sleeved on the outside of the oil guide pipe 12. The two ends of the reset spring 13 are fixedly connected to the oil storage pipe 8 and the wire anti-wear roller 7, respectively. When the single wire is stopped, there is no single wire acting on the wire anti-wear roller 7. The reset spring 13 can drive the oil guide pipe 12 to reset, so that the oil guide pipe 12 is disconnected from the oil cavity 11, thus avoiding lubricating oil leakage.

[0028] See Figure 3In this embodiment, a partition 14 is fixedly provided inside the oil cavity 11, which divides the oil cavity 11 into a first oil storage channel 15 and a second oil storage channel 16. A first lifting groove 17 is provided on the partition 14, and a second lifting groove 18 corresponding to the first lifting groove 17 is provided on the side wall of the oil cavity 11. The oil guide pipe 12 is slidably disposed inside the second lifting groove 18. An oil inlet hole 19 is provided on the side wall of the oil guide pipe 12. In the initial state, the oil inlet hole 19 is exactly located inside the second lifting groove 18 and is blocked by the side wall of the second lifting groove 18, so that the oil cavity 11 is disconnected from the oil guide pipe 12. A sealing component is provided at the upper end of the oil guide pipe 12. The sealing component is used to block the first lifting groove 17 and the second lifting groove 18 to improve the sealing effect of the oil cavity 11.

[0029] See Figure 3 and Figure 6 In this embodiment, the sealing assembly includes a first sealing plate 20, a second sealing plate 21, and a connecting post 22. The connecting post 22 is fixedly disposed between the first sealing plate 20 and the second sealing plate 21. The first sealing plate 20 is used to seal the first lifting groove 17, and the second sealing plate 21 is used to seal the second lifting groove 18. The connecting post 22 is slidably disposed in the first lifting groove 17. The diameter of the first lifting groove 17 is larger than the diameter of the connecting post 22. When the first sealing plate 20 is removed from the first lifting groove 17, it ensures that the lubricating oil can flow from the first lifting groove 17 into the second oil storage channel 16. The oil guide pipe 12 is adapted to the orifice of the second lifting groove 18, and can completely seal the second lifting groove 18 to prevent the lubricating oil from leaking from the second lifting groove 18.

[0030] As a specific embodiment, the first sealing plate 20 and the second sealing plate 21 are fixedly provided with sealing pads in the direction of the first lifting groove 17 and the second lifting groove 18; or as an alternative embodiment, the first sealing plate 20 and the second sealing plate 21 are sealing pads, and the sealing effect of the first sealing plate 20 and the second sealing plate 21 on the first lifting groove 17 and the second lifting groove 18 is further improved by the elastic fit of the sealing pads, so as to prevent lubricating oil leakage.

[0031] See Figure 3 and Figure 4 In this embodiment, the surface of the anti-wear roller 7 facing the axis of the gathering horn 6 is arc-shaped, which matches the arc-shaped structure of the single wire surface, so that the single wire and the anti-wear roller 7 are in surface contact, reducing the contact pressure. The arc-shaped surface of the anti-wear roller 7 is always located on the inner side of the gathering horn 6, ensuring that the single wire enters the gathering horn 6 directly after being guided by the anti-wear roller 7, avoiding wear caused by the single wire contacting the inner wall of the gathering horn 6 during the conveying process.

[0032] See Figure 3 and Figure 4In this embodiment, an adjusting screw 23 is threadedly connected to the side wall of the wire anti-wear roller 7. A sealing plate 24 is fixedly provided at one end of the adjusting screw 23 located in the lubrication cavity 9. The sealing plate 24 is configured to slide within the lubrication cavity 9 driven by the adjusting screw 23. Two sets of adjusting screws 23 are symmetrically provided at both ends of the wire anti-wear roller 7, and two sets of sealing plates 24 are provided corresponding to the adjusting screws 23. By rotating the adjusting screw 23 to adjust the position of the two sets of sealing plates 24 in the lubrication cavity 9, the lubrication cavity 9 interval between the two sets of sealing plates 24 can be adjusted. Only the lubrication hole 10 corresponding to this interval can leak lubricating oil to lubricate the single line, thereby achieving precise control of the lubricating oil leakage position and leakage amount.

[0033] See Figure 3 In this embodiment, an oil replenishment pipe 25 is fixedly provided on the oil storage pipe 8. The oil replenishment pipe 25 is connected to the first oil storage channel 15 of the oil cavity 11. Lubricating oil can be replenished into the oil storage pipe 8 through the oil replenishment pipe 25 to ensure the continuity of lubrication supply.

[0034] See Figures 7-10 In this embodiment, a drive cavity 26 is provided inside the wire distributor 3, and the drive cavity 26 is connected to the wire threading hole 4. The wire assembly also includes two sets of symmetrically arranged adjustment assemblies, which are respectively connected to the limiting wire roller 5. The adjustment assembly includes a drive shaft 27, a nut sleeve 28, a threaded rod 29, and a mounting bracket 30. The drive shaft 27 is rotatably mounted on the side wall of the drive cavity 26, and a driving bevel gear 31 is fixedly mounted on the drive shaft 27. The nut sleeve 28 is rotatably mounted on the side wall of the drive cavity 26, and a driven bevel gear 32 is fixedly mounted on the nut sleeve 29. 2 meshes with the active bevel gear 31. The threaded rod 29 is connected to the nut sleeve 28 via threads. The mounting frame 30 is fixedly connected to the end of the threaded rod 29. The limiting guide roller 5 is rotatably mounted on the mounting frame 30 via a rotating shaft. A guide groove 33 is provided on the side wall of the drive cavity 26. Guide protrusions 34 are fixedly provided at both ends of the mounting frame 30. The guide protrusions 34 are engaged and slidably disposed in the guide groove 33. Through the cooperation between the guide protrusions 34 and the guide groove 33, the rotation of the mounting frame 30 is restricted, so that the threaded rod 29 can drive the mounting frame 30 to move linearly along the guide groove 33.

[0035] See Figure 7 and Figure 8 In this embodiment, the drive shafts 27 of the two sets of adjustment assemblies of each wire assembly rotate synchronously in the same direction, and the thread directions of the nut sleeves 28 and threaded rods 29 of the two sets of adjustment assemblies of each wire assembly are opposite. When the drive shafts 27 of the two sets of adjustment assemblies of each wire assembly rotate synchronously in the same direction, they can drive the two sets of threaded rods 29 to move synchronously in opposite directions, thereby driving the two sets of limit wire rollers 5 to move synchronously in opposite directions, so as to achieve precise adjustment of the distance between the two sets of limit wire rollers 5.

[0036] See Figure 5and Figure 7 In this embodiment, each set of wire assembly has two adjustment assemblies, namely an upper adjustment assembly 35 and a lower adjustment assembly 36. A drive motor 37 is fixedly installed on the side wall of the wire distribution disk 3, and a central gear 38 and an external gear 39 are rotatably installed. The central gear 38 is coaxial with the wire distribution disk 3. Multiple sets of external gears 39 are provided on the outer periphery of the central gear 38, and all sets of external gears 39 mesh with the central gear 38. The multiple sets of external gears 39 are respectively fixed on the drive shaft 27 of each lower adjustment assembly 36. The output shaft of the drive motor 37 is fixedly connected to the drive shaft 27 of one set of lower adjustment assemblies 36 to provide power for spacing adjustment. A transmission shaft 40 is rotatably installed on the wire distribution disk 3. The drive shafts 27 of the two sets of adjustment assemblies of one set of wire assembly are connected to the transmission shaft 40 through a transmission belt 41. The drive shafts 27 of the upper adjustment assemblies 35 of two adjacent sets of wire assembly are connected through a transmission belt 41 to realize the synchronous adjustment of multiple sets of wire assembly.

[0037] See Figure 5 In this embodiment, a set of core wire holes 42 are provided at the center of the distribution plate 3. The core wire holes 42 are coaxially corresponding to the axis of the retractable horn 6. The central gear 38 is rotatably mounted on the distribution plate 3 via a rotating shaft. The rotating shaft of the central gear 38 is hollow and is connected to the core wire holes 42. When the production of the heat tracing cable requires core wires, the core wires can be passed through the hollow rotating shaft and the core wire holes 42 to achieve synchronous twisting of the core wires with the outer single wires.

[0038] During operation, the drive motor 37 is started according to the diameter of the single wire to be stranded. The drive motor 37 drives the drive shaft 27 of the lower adjustment assembly 36 connected to it to rotate. The drive shaft 27 drives the external gear 39 to rotate, which in turn drives the central gear 38 and the other sets of external gears 39 to rotate synchronously, realizing the synchronous and unidirectional rotation of the drive shafts 27 of all lower adjustment assemblies 36. At the same time, through the transmission shaft 40 and the transmission belt 41, the drive shafts 27 of all upper adjustment assemblies 35 are driven to rotate synchronously and in the same direction. When the drive shaft 27 rotates, the active bevel gear 31 drives the driven bevel gear 32 and the nut sleeve 28 to rotate. Since the threads of the nut sleeves 28 and the threaded rods 29 of the two adjustment assemblies are opposite in direction, and the mounting bracket 30 is restricted from rotating by the guide groove 33, the two sets of threaded rods 29 drive the mounting bracket 30 and the limiting guide rollers 5 to move synchronously in opposite directions along the guide groove 33 until the two sets of limiting guide rollers 5 are in contact with the surface of the single wire, realizing the precise positioning of single wires of different diameters, ensuring that the single wire is transported along the preset path, and avoiding radial deviation.

[0039] After the single wire passes through the wire hole 4 of the wire distributor 3, it is guided into the retracting horn 6 through the arc surface of the wire anti-wear roller 7. Under the action of traction, the single wire applies a radial tension to the wire anti-wear roller 7 along the retracting horn 6, driving the wire anti-wear roller 7 to slide the oil guide pipe 12 outward along the second lifting groove 18, and the return spring 13 is stretched. When the oil guide pipe 12 slides, it drives the sealing assembly to move upward. The first sealing plate 20 and the second sealing plate 21 move away from the first lifting groove 17 and the second lifting groove 18, respectively. The oil inlet hole 19 slides with the oil guide pipe 12 into the second oil storage channel 16. The lubricating oil in the first oil storage channel 15 flows into the second oil storage channel 16 through the first lifting groove 17, and then enters the oil guide pipe 12 through the oil inlet hole 19, and finally flows into the lubrication chamber 9.

[0040] The operator can adjust the position of the two sets of sealing plates 24 in the lubrication chamber 9 by rotating the adjusting screw 23 according to the contact position between the single wire and the anti-wear roller 7. This allows the lubricating oil to seep out only from the lubrication hole 10 corresponding to the contact position of the single wire, providing precise lubrication to the single wire and reducing friction between the single wire and the anti-wear roller 7. The arc surface design of the anti-wear roller 7 and the structure with its lower end located inside the folding horn 6 completely avoid contact between the single wire and the inner wall of the folding horn 6, preventing wear on the single wire.

[0041] When the single line is stopped, the tension of the single line on the anti-wear roller 7 of the conductor disappears. The elastic restoring force of the return spring 13 drives the oil guide pipe 12 and the anti-wear roller 7 of the conductor to reset. The oil guide pipe 12 slides inward along the second lifting groove 18, and the oil inlet hole 19 returns to the second lifting groove 18 and is blocked by the side wall. After the first sealing plate 20 and the second sealing plate 21 of the sealing assembly are reset, they re-seal the first lifting groove 17 and the second lifting groove 18. The double seal is achieved by the elastic fit of the sealing gasket, which effectively prevents the lubricating oil in the oil cavity 11 from leaking.

[0042] When the amount of lubricating oil in the oil chamber 11 is insufficient, lubricating oil can be added to the first oil storage channel 15 through the oil replenishment pipe 25 to ensure the continuity of lubrication supply.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0044] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A twisting machine for producing heat tracing tape, characterized in that, It includes a branching guide mechanism (1) and a cable gathering mechanism (2) arranged sequentially along the conveying direction of the heat tracing cable; The wire guiding mechanism (1) includes a wire separating disk (3), which has multiple sets of wire-passing holes (4) in its circumference. The wire separating disk (3) is provided with a wire assembly, which is provided with multiple sets of wire assemblies corresponding to the wire-passing holes (4). The wire assembly includes two sets of adjustable spacing limit wire rollers (5) to adapt to single wires of different diameters. The wire gathering mechanism (2) includes a gathering horn (6), a wire anti-wear roller (7), and an oil storage pipe (8). The wire anti-wear roller (7) is provided in multiple sets along the circumference of the gathering horn (6). The single wire is guided into the gathering horn (6) through the wire anti-wear roller (7). The wire anti-wear roller (7) is provided with a lubrication cavity (9). A lubrication hole (10) is opened on one side wall of the lubrication cavity (9). The oil storage pipe (8) is provided with an oil cavity (11). An oil guide pipe (12) is slidably provided through the side wall of the oil cavity (11). The oil guide pipe (12) is fixedly connected to the wire anti-wear roller (7), and the interior of the oil guide pipe (12) is connected to the lubrication cavity (9).

2. The wire twisting machine for producing heat tracing tape according to claim 1, characterized in that, A reset spring (13) is sleeved on the outside of the oil guide pipe (12), and the two ends of the reset spring (13) are fixedly connected to the oil storage pipe (8) and the wire anti-wear roller (7), respectively.

3. The wire twisting machine for producing heat tracing tape according to claim 2, characterized in that, A partition (14) is fixedly provided inside the oil cavity (11). The partition (14) divides the oil cavity (11) into a first oil storage channel (15) and a second oil storage channel (16). A first lifting groove (17) is provided on the partition (14). A second lifting groove (18) corresponding to the first lifting groove (17) is provided on the side wall of the oil cavity (11). The oil guide pipe (12) is slidably disposed inside the second lifting groove (18). An oil inlet hole (19) is provided on the side wall of the oil guide pipe (12). A sealing component is provided at the upper end of the oil guide pipe (12). The sealing component is used to seal the first lifting groove (17) and the second lifting groove (18).

4. The wire twisting machine for producing heat tracing tape according to claim 3, characterized in that, The sealing assembly includes a first sealing plate (20), a second sealing plate (21), and a connecting column (22). The connecting column (22) is fixedly disposed between the first sealing plate (20) and the second sealing plate (21). The first sealing plate (20) is used to seal the first lifting groove (17), and the second sealing plate (21) is used to seal the second lifting groove (18). The connecting column (22) is slidably disposed in the first lifting groove (17). The diameter of the first lifting groove (17) is larger than the diameter of the connecting column (22). The oil guide pipe (12) is adapted to the aperture of the second lifting groove (18).

5. The wire twisting machine for producing heat tracing tape according to claim 1, characterized in that, The surface of the anti-wear roller (7) facing the axis of the horn (6) is arc-shaped, which is compatible with the arc structure of the single wire surface; the arc-shaped surface of the anti-wear roller (7) is always located on the inner side of the horn (6).

6. The wire twisting machine for producing heat tracing tape according to claim 5, characterized in that, An adjusting screw (23) is threadedly connected to the side wall of the wire anti-wear roller (7). A sealing plate (24) is fixedly provided at one end of the adjusting screw (23) located in the lubrication cavity (9). The sealing plate (24) is configured to slide in the lubrication cavity (9) driven by the adjusting screw (23). Two sets of adjusting screws (23) are symmetrically provided at both ends of the wire anti-wear roller (7). Two sets of sealing plates (24) are provided corresponding to the adjusting screws (23).

7. The wire twisting machine for producing heat tracing tape according to claim 1, characterized in that, The dividing disc (3) has a driving cavity (26) inside, which is connected to the wire hole (4). The wire assembly also includes two sets of symmetrically arranged adjustment assemblies, which are respectively connected to the limiting wire roller (5). The adjustment assembly includes a driving shaft (27), a nut sleeve (28), a threaded rod (29), and a mounting bracket (30). The driving shaft (27) is rotatably mounted on the side wall of the driving cavity (26), and an active bevel gear (31) is fixedly mounted on the driving shaft (27). The nut sleeve (28) is rotatably mounted on the side wall of the driving cavity (26), and the threaded rod (29) is fixedly mounted on the drive shaft (27). A driven bevel gear (32) is fixedly provided on the mother cylinder (28). The driven bevel gear (32) meshes with the driving bevel gear (31). The threaded rod (29) is connected to the nut cylinder (28) by threads. The mounting bracket (30) is fixedly connected to the end of the threaded rod (29). The limiting guide roller (5) is rotatably mounted on the mounting bracket (30) via a rotating shaft. A guide groove (33) is provided on the side wall of the drive cavity (26). Guide protrusions (34) are fixedly provided at both ends of the mounting bracket (30). The guide protrusions (34) are engaged and slidably disposed in the guide groove (33).

8. The wire twisting machine for producing heat tracing tape according to claim 7, characterized in that, The drive shafts (27) of the two sets of adjustment assemblies of each wire assembly rotate synchronously in the same direction, and the thread directions of the nut sleeves (28) and threaded rods (29) of the two sets of adjustment assemblies of each wire assembly are opposite.

9. The wire twisting machine for producing heat tracing tape according to claim 1, characterized in that, A set of core wire holes (42) are provided at the center of the splitter plate (3), and the core wire holes (42) are coaxial with the axis of the retractable horn (6).

Images