Highly insulated signal wire harness and ptfm film wrapping apparatus therefor

Abstract

The application relates to the technical field of signal wire winding, in particular to a PTFE film winding and packaging equipment for high-insulation signal wire bundles, which comprises a winding part, a preheating assembly is arranged on one side of the winding part, a cooling part is arranged at one end of the preheating assembly, a driving assembly is embedded at one end of the preheating assembly and connected with the cooling part, an exhaust assembly is arranged in the preheating assembly, the preheating assembly comprises a mounting pipe, the two ends of the mounting pipe are detachably connected with fixing discs, one end of a group of the fixing discs is fixedly connected with a limiting sleeve, a guide part is arranged in the mounting pipe, and an exhaust pipe is fixedly connected through the outer surface of the mounting pipe. The application is provided with the structures of the extrusion part and the uniform part, adopts the common extrusion of the waist-shaped roller and the straight roller during the winding process, and is provided with the setting of exhausting first and then extruding and extending, so that the residual air between the PTFE film layers is reduced, the PTFE film layers can be closely attached without air gap, and the insulation performance of the finished product of the high-insulation signal wire bundle is improved.

Description

Technical Field

[0001] This invention relates to the field of signal wire wrapping technology, and more particularly to a high-insulation signal wire harness and its PTFE film wrapping equipment. Background Technology

[0002] In the operation of high-voltage testing equipment, power transformers, high-voltage frequency converters, and insulation testing instruments, multiple sets of sensors need to be deployed for sampling. High-insulation signal harnesses are an important component of sensors. During the production process, high-insulation signal harnesses require the use of wrapping equipment to wrap a certain width of PTFE film around the outer surface of the wire to maintain stable high insulation performance, thereby improving the overall withstand voltage level of the wire and suppressing leakage and creepage phenomena under high-voltage electric fields.

[0003] For example, Chinese patent CN218159808U discloses a cable wrapping machine, which includes a wrapping mechanism and a pressing mechanism. The rotating drum is driven by a motor and a gear to rotate the rotating disk. Under the action of the guide rod, the wrapping tape is wrapped around the upper end of the cable. After the cable is heated in the heating chamber inside the extended drum, the pressing wheel applies force to the heated wrapping tape, making the wrapping tapes fit tightly together. Then, the cable is cooled by the fan inside the cooling box.

[0004] The aforementioned device uses a pressing roller to apply pressure after wrapping to ensure a tight fit of the tape. However, in the processing of highly insulated signal lines, PTFE film is generally used. PTFE film itself has low surface energy and is not easy to fit tightly with the conductor. Furthermore, the PTFE film is overlapped at an angle, making it easier for air to remain at the overlap of the PTFE film layers, which reduces the production quality of the signal line. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that air residue easily occurs when PTFE film is rolled by straight rollers and overlapped at an angle in the prior art, which reduces the production quality of signal lines. Therefore, this invention proposes a high-insulation signal wire harness and its PTFE film winding and packaging equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a highly insulated signal harness, comprising a conductor, a PTFE film layer, a metal braided shielding layer, and a sheath layer arranged sequentially from the inside to the outside; The conductor is made of 12 strands of tin-plated copper monofilaments with a diameter of 0.08 mm twisted together; The PTFE film layer is made by spirally overlapping PTFE films with a size of 5.5mm × 0.035mm on the outside of the stranded conductor layer, and the overlap rate of the PTFE film is greater than 40%. The metal braided shielding layer has a 16-spindle braided structure, with each spindle consisting of three tin-plated copper monofilaments with a diameter of 0.10mm braided together, which are completely wrapped around the outside of the PTFE membrane wrapping insulation layer. The sheath layer is formed by extrusion of FEP material with a melt index of 20 to 22, and the long-term service temperature of the sheath is 150 degrees Celsius.

[0007] Preferably, the ratio of the number of tin-plated copper monofilaments to the number of silver-plated copper monofilaments can be adjusted according to the operating conditions; The FEP raw material for preparing the sheath layer is dried at 130 degrees Celsius for at least 2 hours before extrusion molding.

[0008] A PTFE film wrapping and packaging device for a high-insulation signal harness includes a wrapping section, a preheating component is provided at intervals on one side of the wrapping section, a cooling section is provided at one end of the preheating component, a driving component is embedded at the end of the preheating component connected to the cooling section, an exhaust component is provided inside the preheating component, and the driving component is connected to one end of the exhaust component, and a conductor passes through the wrapping section, the preheating component, the exhaust component, the driving component and the cooling section in sequence; The preheating component includes a mounting tube detachably mounted at one end of the cooling section. A clearance groove is provided between the mounting tube and the cooling section to allow the drive component to operate. Fixed plates are detachably connected to both ends of the mounting tube. Both the mounting tube and the fixed plates are made of heat-insulating material. A limit sleeve is fixedly connected to one end of the fixed plates facing the wrapping section near the wrapping section. A guide component is provided inside the mounting tube, and one end of the guide component penetrates the mounting tube. An exhaust pipe is fixedly connected through the outer surface of the mounting tube, and one end of the exhaust pipe is connected to an external gas recovery heating device.

[0009] Preferably, the guide component includes a rotating disk that is rotatably connected to the inner wall of the mounting pipe. A flow groove is formed on the outer surface of the rotating disk. An air inlet pipe is fixedly connected through the outer surface of the mounting pipe, and the air inlet end of the air inlet pipe is connected to an external gas recovery heating device. The air outlet end of the air inlet pipe is located inside the flow groove. An air outlet pipe is fixedly connected through the inner side of the rotating disk, and multiple sets of air outlet pipes are arranged in a circular array. The flow groove and the inner side of the rotating disk are connected through multiple sets of air outlet pipes. Two sets of fixed seats are fixedly connected at intervals at one end of the rotating disk near the exhaust component.

[0010] Preferably, the drive assembly includes a fixing block that is detachably and fixedly connected to the inner wall of the end where the mounting tube connects to the cooling section. A mounting base is fixedly connected to the lower end of the fixing block, and a pulley is rotatably connected to one end of the mounting base. The drive assembly also includes a drive unit mounted on an external bracket, and the drive unit is in contact with the outer surface of the pulley.

[0011] Preferably, the exhaust assembly includes a transmission rod detachably and fixedly connected to one end of the pulley, and two sets of transmission rods are symmetrically arranged. A semi-circular arc plate is fixedly connected to the end of each set of transmission rods. Multiple through holes are formed on the outer surface of the semi-circular arc plate. The two sets of semi-circular arc plates are symmetrically arranged, and their contact surfaces are fixedly connected by bolts. Two sets of connecting rods are fixedly connected at intervals to the inner wall of the end of the semi-circular arc plate away from the transmission rod, and the two sets of connecting rods are respectively engaged with two sets of fixed seats. Adjustment components and uniformizing components are arranged inside the semi-circular arc plate, with three sets of adjustment components spaced apart and four sets of uniformizing components spaced apart. The adjustment components and uniformizing components are spirally arranged along the conductor's movement direction, with an angle difference of 60 degrees between adjacent adjustment components and uniformizing components. A pressing component is provided at one end of the adjustment component, and both the adjustment component and the pressing component are inclined relative to the conductor's axial direction. Both the pressing component and the uniformizing component are in contact with the PTFE membrane.

[0012] Preferably, the adjusting component includes a mounting strip that is detachably and fixedly connected to the inner wall of the semi-circular arc plate. A first electric telescopic rod is fixedly connected to one side of the mounting strip. The first electric telescopic rod has a built-in pressure detection structure. A sliding block is fixedly connected to the lower end of the first electric telescopic rod, and the sliding block is engaged and slidably connected to one side of the mounting strip. An adjusting arc plate is fixedly connected to the lower end of the sliding block. Multiple sets of engaging grooves are evenly opened on the outer surface of the adjusting arc plate, and through grooves are opened on both sides of the adjusting arc plate.

[0013] Preferably, the extrusion component includes an installation rod that movably passes through the through groove. One end of the installation rod is threadedly connected to a screw rod, and a limiting block is movably connected through the screw rod. The limiting block is engaged with the installation rod and a set of the engagement grooves. The contact surface between the limiting block and the adjusting arc plate is provided with an anti-slip rubber layer. A limiting rod is fixedly connected to the outer surface of the installation rod, and the limiting rod contacts the inner side of the adjusting arc plate.

[0014] Preferably, a waist-shaped roller is fixedly connected to the outer surface of the mounting rod, and the waist-shaped roller has a built-in temperature control structure. The temperature of the three sets of waist-shaped rollers increases progressively along the conductor travel direction with a base of 60 degrees and a difference of 40 degrees. An extrusion arc surface is opened on the outer side of the waist-shaped roller, and the center of the adjusting arc plate is located at the center of gravity of the waist-shaped roller. The extrusion arc surface is in inclined contact with the conductor, and the contact surface is consistent with the width direction of the PTFE film. A convex ring is fixedly connected to the middle of the extrusion arc surface. The convex ring divides the extrusion arc surface into two segments. The two segments of the extrusion arc surface contact the overlapping positions of the left and right sides of the PTFE film, respectively, and the convex ring contacts the non-overlapping positions of the PTFE film.

[0015] Preferably, the uniform component includes a connecting strip detachably and fixedly connected to the inner side of the semi-circular plate. A second electric telescopic rod is fixedly connected to one side of the connecting strip, and the second electric telescopic rod has a built-in pressure detection structure. The lower end of the second electric telescopic rod is rotatably connected to a straight roller through a connecting block, and the straight roller has a built-in temperature control structure. The temperature of the four sets of straight rollers decreases stepwise along the conductor's travel direction with a reference of 180 degrees and a difference of 30 degrees. The connecting block slides and engages with one side of the connecting strip, and the straight roller is set along the conductor's movement direction, and the straight roller is in contact with the PTFE membrane on the outside of the conductor.

[0016] Compared with existing technologies, the advantages of this invention are: 1. This invention, through the arrangement of extrusion and uniform components, ensures that the extrusion arc surface remains in contact with the PTFE film at the overlap position during the wrapping process, and the convex ring remains in contact with the unoverlapped PTFE film. This avoids insufficient extrusion at the unoverlapped position, which would result in poor air expulsion. This effectively improves the air expulsion effect between PTFE film layers. During the extrusion process, with the continuous spiral extrusion of the waist-shaped roller, the air between the PTFE film and the conductor can be expelled from the overlap edge that is connected to the outside. Subsequently, the PTFE film on the outside of the conductor is radially extruded by four sets of straight rollers. The straight rollers can evenly extend the double-layer overlap area, thereby eliminating gaps between layers. By expelling air before extrusion and extension, the obstruction of residual air to the extension of the PTFE film is reduced, thereby ensuring that the PTFE film layers are bonded without gaps and improving the insulation performance of the high-insulation signal harness product. 2. This invention, through the setting of preheating and exhaust components, allows hot air to be blown annularly onto the outer surface of the conductor through multiple sets of exhaust pipes during the extrusion and exhaust process. This achieves preheating of the PTFE film wrapped around the outer surface of the conductor. The setting of heating with waist-shaped rollers and cooling with straight rollers is different from the conventional structure that simply extrudes without graded temperature control. This avoids the problems of sudden heating of the PTFE film causing large internal stress and rapid expansion of interlayer air locking up air bubbles. It allows the extrusion arc surface and convex ring to accurately contact the overlapping and non-overlapping positions of the PTFE film when the conductor is transported. Extrusion can be carried out simultaneously with contact heating and cooling, and exhaust and stretching can be performed at the same time, improving processing efficiency. At the same time, the PTFE film is kept at a low temperature after the air is exhausted, reducing the possibility of the PTFE film rebounding and causing air to re-enter. Subsequently, the conductor can be further cooled after entering the cooling section, so that the shape of the PTFE film is fixed and the possibility of air being re-entered is reduced. 3. This invention features a detachable design for the preheating, exhaust, and drive components, facilitating equipment adjustment and maintenance. Furthermore, by aligning the center of the arc plate with the center of gravity of the waist-shaped roller, the extrusion arc surface rotates around the center of gravity of the waist-shaped roller when the mounting rod rotates. This ensures that the center of gravity of the three sets of waist-shaped rollers remains unchanged after angle adjustment, maintaining a spiral distribution and preventing separation from the outer PTFE membrane during use. This allows the equipment to adapt to signal line production with different wrapping angles and overlaps, improving its applicability. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a highly insulated signal harness proposed in this invention; Figure 2 This is a schematic diagram of the overall structure of a PTFE film wrapping packaging device for a high-insulation signal harness proposed in this invention. Figure 3 This is a schematic diagram of the preheating component, cooling section, and drive component of a PTFE film winding packaging device for a high-insulation signal harness proposed in this invention. Figure 4 This is a schematic diagram of the preheating and exhaust components of a PTFE film wrapping packaging device for a high-insulation signal harness proposed in this invention. Figure 5 This is a schematic diagram of the guide component, exhaust component, and drive component of a PTFE film winding packaging device for a high-insulation signal harness proposed in this invention; Figure 6 This is a schematic diagram of the guide component and connecting rod structure of a PTFE film winding packaging device for a high-insulation signal harness proposed in this invention; Figure 7 This is a structurally disassembled schematic diagram of the venting assembly of a PTFE film-wrapped packaging device for a high-insulation signal harness proposed in this invention. Figure 8 This is a schematic diagram of the adjusting and extruding components of a PTFE film winding and packaging equipment for a high-insulation signal harness proposed in this invention. Figure 9 This is a schematic diagram of the adjustment and extrusion components of a PTFE film winding and packaging device for a high-insulation signal harness proposed in this invention. Figure 10 This is a structurally disassembled diagram of the extrusion component of a PTFE film wrapping packaging device for a high-insulation signal harness proposed in this invention. Figure 11 This is a schematic diagram of the uniform component structure of a PTFE film winding packaging device for a high-insulation signal harness proposed in this invention.

[0018] In the diagram: 1. Conductor; 2. PTFE membrane layer; 3. Metal braided shielding layer; 4. Sheath layer; 5. Wrapping section; 6. Preheating assembly; 61. Mounting pipe; 62. Fixing plate; 63. Limiting sleeve; 64. Guide component; 641. Rotating plate; 642. Inlet pipe; 643. Outlet pipe; 644. Fixing base; 645. Flow groove; 65. Exhaust pipe; 7. Cooling section; 8. Drive assembly; 81. Fixing block; 82. Mounting base; 83. Pulley; 84. Drive section; 9. Exhaust assembly; 91. Semicircle 92. Arc plate; 93. Transmission rod; 94. Connecting rod; 95. Adjusting component; 96. Mounting strip; 97. First electric telescopic rod; 98. Sliding block; 99. Adjusting arc plate; 90. Engaging groove; 91. Through groove; 92. Extrusion component; 93. Mounting rod; 94. Screw; 95. Limiting block; 96. Waist-shaped roller; 97. Extrusion arc surface; 98. Limiting rod; 99. Convex ring; 90. Uniforming component; 91. Connecting strip; 92. Second electric telescopic rod; 96. Straight roller. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-11 As shown, a highly insulated signal harness includes a conductor 1, a PTFE film layer 2, a metal braided shielding layer 3, and a sheath layer 4 arranged sequentially from the inside out. Conductor 1 is made of 12 strands of tin-plated copper monofilaments with a diameter of 0.08 mm twisted together; The PTFE film layer 2 is made of PTFE film with a size of 5.5mm×0.035mm spirally overlapped and wrapped on the outside of the stranded conductor layer. The overlap rate of the PTFE film is greater than 40%. The number of PTFE film layers can be changed according to the requirements. The overlap is tighter, and the conductor is less likely to be exposed after bending, which improves the voltage resistance and breakdown resistance performance, while also improving the bending and folding stability. The metal braided shielding layer 3 has a 16-spindle braided structure. Each spindle is made of 3 tin-plated copper monofilaments with a diameter of 0.10mm braided together, and is completely wrapped around the outside of the PTFE membrane wrapping insulation layer. The sheath layer 4 is made of FEP material with a melt index of 20 to 22 through extrusion molding, and the long-term service temperature of the sheath is 150 degrees Celsius.

[0021] The ratio of tin-plated copper monowires to silver-plated copper monowires can be adjusted according to the operating conditions. Before extrusion molding, the FEP raw material for preparing the sheath layer 4 is dried at 130 degrees Celsius for at least 2 hours to reduce the occurrence of problems such as pressure breakdown, inconsistent wire diameter, bulging and peeling.

[0022] The present invention also provides a PTFE film wrapping device for a high-insulation signal wire harness, including a wrapping part 5, a preheating component 6 is provided at intervals on one side of the wrapping part 5, a cooling part 7 is provided at one end of the preheating component 6, a driving component 8 is embedded at the end of the preheating component 6 connected to the cooling part 7, an exhaust component 9 is provided inside the preheating component 6, and the driving component 8 is connected to one end of the exhaust component 9. The conductor 1 passes through the wrapping part 5, the preheating component 6, the exhaust component 9, the driving component 8 and the cooling part 7 in sequence. The wrapping part 5 wraps the PTFE film around the outer surface of the conductor 1 and the cooling part 7 cools the conductor 1 inside. These are existing technologies and will not be described in detail. The preheating component 6 is used to preheat the conductor 1 that enters the interior. The driving component 8 is used to drive the exhaust component 9 to rotate. The exhaust component 9 is used to limit the conductor 1 and squeeze out the gas remaining during the wrapping process. The preheating component 6 includes a mounting pipe 61 detachably mounted at one end of the cooling section 7. A clearance groove is provided between the mounting pipe 61 and the cooling section 7 to allow the drive component 8 to operate. Both ends of the mounting pipe 61 are detachably connected to a fixing plate 62. Both the mounting pipe 61 and the fixing plate 62 are made of heat-insulating material. A set of fixing plates 62 near the wrapping section 5 are fixedly connected to a limiting sleeve 63 at the end facing the wrapping section 5. A guide component 64 is provided inside the mounting pipe 61, and one end of the guide component 64 passes through the mounting pipe 61. An exhaust pipe 65 is fixedly connected through the outer surface of the mounting pipe 61. One end of the exhaust pipe 65 is connected to an external gas recovery heating device. The mounting pipe 61 and the fixing plate 62 are used for heat preservation to reduce heat loss. The limiting sleeve 63 is used to limit the conductor 1. External hot air can be evenly blown onto the PTFE film on the outer surface of the conductor 1 through the guide component 64. The high-temperature gas inside the mounting pipe 61 can be extracted through the exhaust pipe 65 and then recovered and reused by the gas recovery device to reduce energy loss.

[0023] The guide component 64 includes a rotating disk 641 that is rotatably connected to the inner wall of the mounting pipe 61. A flow groove 645 is provided on the outer surface of the rotating disk 641. An air inlet pipe 642 is fixedly connected through the outer surface of the mounting pipe 61, and the air inlet end of the air inlet pipe 642 is connected to an external gas recovery heating device. The air outlet end of the air inlet pipe 642 is located inside the flow groove 645. An air outlet pipe 643 is fixedly connected through the inner side of the rotating disk 641, and multiple sets of air outlet pipes 643 are arranged in a ring array. The flow groove 645 and the inner side of the rotating disk 641 are connected through multiple sets of air outlet pipes 643. Two sets of fixed seats 644 are fixedly connected at intervals to one end of the rotating disk 641 near the exhaust component 9. After the external hot air enters the interior of the flow groove 645, it can be blown to the outer surface of the conductor 1 through multiple sets of air outlet pipes 643.

[0024] The drive assembly 8 includes a fixing block 81 that is detachably and fixedly connected to the inner wall of the end where the mounting tube 61 connects to the cooling section 7. The lower end of the fixing block 81 is fixedly connected to a mounting base 82. One end of the mounting base 82 is rotatably connected to a pulley 83. The drive assembly 8 also includes a drive part 84 mounted on an external bracket. The drive part 84 is in contact with the outer surface of the pulley 83. Driving the pulley 83 to rotate via the drive part 84 is prior art and will not be described in detail. The fixing block 81 and the mounting base 82 are used to support the pulley 83.

[0025] The exhaust assembly 9 includes a transmission rod 92 detachably and fixedly connected to one end of the pulley 83. Two sets of transmission rods 92 are symmetrically arranged, and a semi-circular arc plate 91 is fixedly connected to the end of each set of transmission rods 92. Multiple through holes are formed on the outer surface of the semi-circular arc plate 91. The two sets of semi-circular arc plates 91 are symmetrically arranged, and their contact surfaces are fixedly connected by bolts. Two sets of connecting rods 93 are fixedly connected at intervals to the inner wall of the end of the semi-circular arc plate 91 away from the transmission rod 92. The two sets of connecting rods 93 are respectively engaged with two sets of fixed seats 644. Adjustment components 94 and uniform components 96 are arranged on the inner side of the semi-circular arc plate 91. Three sets of adjustment components 94 are spaced apart, and four sets of uniform components 96 are spaced apart. Adjustment component 94 and uniform component 96 are spirally arranged along the moving direction of conductor 1. The angle difference between adjacent adjustment component 94 and uniform component 96 is 60 degrees. One end of adjustment component 94 is provided with extrusion component 95. Both adjustment component 94 and extrusion component 95 are inclined relative to the axial direction of conductor 1. Extrusion component 95 and uniform component 96 are in contact with PTFE membrane. Transmission rod 92 and connecting rod 93 are used for transmission, so that pulley 83 can drive two sets of transmission rods 92 and semi-circular plate 91 to rotate together. Extrusion component 95 is used to extrude air between PTFE membrane and conductor 1 by extruding it. Uniform component 96 is used to uniformize the thickness of PTFE membrane.

[0026] The adjusting component 94 includes a mounting strip 941 that is detachably and fixedly connected to the inner wall of the semi-circular arc plate 91. A first electric telescopic rod 942 is fixedly connected to one side of the mounting strip 941. The first electric telescopic rod 942 has a built-in pressure detection structure. A sliding block 943 is fixedly connected to the lower end of the first electric telescopic rod 942, and the sliding block 943 is engaged and slidably connected to one side of the mounting strip 941. An adjusting arc plate 944 is fixedly connected to the lower end of the sliding block 943. Multiple sets of engaging grooves 945 are evenly opened on the outer surface of the adjusting arc plate 944. Through grooves 946 are opened through both sides of the adjusting arc plate 944. The vertical position of the sliding block 943 can be adjusted by the first electric telescopic rod 942.

[0027] The extrusion component 95 includes a mounting rod 951 that movably passes through a through groove 946. One end of the mounting rod 951 is threadedly connected to a screw 952. A limiting block 953 is movably connected through the screw 952, and the limiting block 953 is engaged with the mounting rod 951 and a set of engaging grooves 945. The contact surface between the limiting block 953 and the adjusting arc plate 944 is provided with an anti-slip rubber layer. A limiting rod 956 is fixedly connected to the outer surface of the mounting rod 951, and the limiting rod 956 contacts the inner side of the adjusting arc plate 944. The positions of the limiting block 953 and the mounting rod 951 can be fixed by tightening the screw 952. Rotating the screw 952 allows the limiting block 953 to move, at which time the angle of the mounting rod 951 can be adjusted. The limiting rod 956 is used to prevent the mounting rod 951 from sliding.

[0028] A waist-shaped roller 954 is fixedly connected to the outer surface of the mounting rod 951. The waist-shaped roller 954 has a built-in temperature control structure. The temperature of the three sets of waist-shaped rollers 954 increases progressively along the direction of conductor 1, with a base of 60 degrees and a difference of 40 degrees. Adjusting the temperature of the waist-shaped roller 954 via a heating structure is existing technology and will not be elaborated further. An extrusion arc surface 955 is formed on the outer side of the waist-shaped roller 954, and the center of the adjusting arc plate 944 is located at the center of gravity of the waist-shaped roller 954. The extrusion arc surface 955 makes inclined contact with conductor 1, and the contact surface is aligned with the width direction of the PTFE film. During equipment operation... As conductor 1 continues to move, the extrusion arc surface 955 will spirally move along the length of the PTFE film on the outer surface of conductor 1. A convex ring 957 is fixedly connected in the middle of the extrusion arc surface 955. The convex ring 957 divides the extrusion arc surface 955 into two segments. The two segments of the extrusion arc surface 955 contact the overlapping positions of the left and right sides of the PTFE film, respectively. The convex ring 957 contacts the non-overlapping positions of the PTFE film. When the limiting rod 956 is attached to the inner side of the adjusting arc plate 944 and the mounting rod 951 is rotated, the extrusion arc surface 955 will rotate around the center of gravity of the waist roller 954.

[0029] The uniform component 96 includes a connecting strip 961 detachably and fixedly connected to the inner side of the semi-circular plate 91. A second electric telescopic rod 962 is fixedly connected to one side of the connecting strip 961, and the second electric telescopic rod 962 has a built-in pressure detection structure. The lower end of the second electric telescopic rod 962 is rotatably connected to a straight roller 963 through a connecting block, and the straight roller 963 has a built-in temperature control structure. The temperature of the four sets of straight rollers 963 decreases stepwise along the traveling direction of the conductor 1 with a reference of 180 degrees and a difference of 30 degrees. The connecting block slides and engages with one side of the connecting strip 961, and the straight roller 963 is set along the moving direction of the conductor 1. The straight roller 963 contacts the PTFE film on the outer side of the conductor 1 and is used to compress the thickness of the PTFE film to be uniform.

[0030] In this invention, after the PTFE film is wrapped around the outer surface of the conductor 1 by the wrapping part 5, the conductor 1 covered with the PTFE film enters the installation tube 61. The drive part 84 drives the pulley 83, transmission rod 92, semi-circular plate 91, connecting rod 93, and guide part 64 to rotate. The two sets of semi-circular plates 91 drive the uniform part 96, adjusting part 94, and extruding part 95 to rotate together. When the conductor 1 moves between the waist-shaped roller 954 and the straight roller 963, the drive part 84 makes the rotation speed of the adjusting part 94, extruding part 95, and uniform part 96 the same as the PTFE film wrapping speed, so that the three sets of waist-shaped rollers 954 can rotate along the PTFE film wrapping trajectory on the outer surface of the conductor 1. At this time, the convex ring 957 The two extrusion arc surfaces 955 respectively extrude the unoverlapped middle section and the overlapped left and right sides of the PTFE membrane. Since the unoverlapped section is a single layer and the overlapped section is a double layer, there is a gap between the two, where air can easily remain. The protruding extrusion of the convex ring 957 can squeeze out the air in the gap. At the same time, since the movement trajectory of the convex ring 957 and the extrusion arc surface 955 on the outside of the conductor 1 overlaps with the wrapping trajectory of the PTFE membrane, and the three sets of waist-shaped rollers 954 are all spirally arranged, the extrusion arc surface 955 can always maintain contact with the PTFE membrane at the overlapped position when the three sets of waist-shaped rollers 954 rotate on the outside of the conductor 1, and the convex ring 957 can always maintain contact with the unoverlapped PTFE membrane, thus avoiding damage to the unoverlapped position. To address the issue of insufficient compression leading to poor air removal, this method effectively improves the air removal effect between PTFE membrane layers. During the compression process, the pressure detection structure inside the first electric telescopic rod 942 and the second electric telescopic rod 962 dynamically adjusts the compression force of the waist-shaped roller 954 and the straight roller 963 on the PTFE membrane, avoiding excessive compression that could damage the PTFE membrane. As the waist-shaped roller 954 continuously spirals and compresses, the air between the PTFE membrane and conductor 1 is expelled from the overlapping edge that is connected to the outside. Subsequently, the PTFE membrane on the outside of conductor 1 is radially compressed by four sets of straight rollers 963. The straight rollers 963 can evenly extend the double-layer overlapping area, thereby eliminating interlayer gaps. By first venting the air and then compressing and extending it, the air gaps are reduced. Residual air obstructs the stretching of the PTFE membrane, ensuring a seamless bond between the PTFE membrane layers. Simultaneously, during the extrusion and degassing process, external 80°C hot air is introduced into the flow channel 645 through the air inlet pipe 642. As the rotating disk 641 rotates, the hot air is blown annularly onto the outer surface of the conductor 1 through multiple sets of air outlet pipes 643, preheating the PTFE membrane wrapped around the conductor 1. With the continuous movement of the conductor 1, three sets of waist-shaped rollers 954 ensure a stable increase in the temperature of the PTFE membrane on the outer surface of the conductor 1 during extrusion and degassing. Subsequently, four sets of straight rollers 963 ensure that the thickness of the PTFE membrane on the outer surface of the conductor 1 is uniformly compressed while the temperature is stably reduced. This method is significantly more efficient than existing technologies that directly heat the membrane with high-temperature gas.This application utilizes a heating mechanism via a waist-shaped roller 954 and a cooling mechanism via a straight roller 963, which differs from conventional structures that simply extrude without graded temperature control. This avoids problems such as sudden heating of the PTFE film leading to high internal stress and rapid expansion of interlayer air causing air bubbles to lock in. The extrusion arc surface 955 and the convex ring 957 ensure that the conductor 1, during transport, can accurately contact the overlapping and non-overlapping areas of the PTFE film. This allows for simultaneous heating and cooling, extrusion, and simultaneous air venting and stretching, improving processing efficiency. Furthermore, it keeps the PTFE film at a low temperature after air is expelled, reducing the possibility of air re-entry due to PTFE film rebound. Subsequently, the conductor 1 enters the cooling section 7 for further cooling, ensuring the PTFE film maintains its shape and reducing the possibility of air re-entry, thus improving the insulation performance of the high-insulation signal harness product. When it is necessary to replace the extrusion component 95 or adjust the angle of the waist-shaped roller 954, separate the mounting tube 61 and the cooling section 7, then separate the fixing block 81 from the mounting tube 61 and move the drive assembly 8 out of the mounting tube 61. Then pull the transmission rod 92 to separate the connecting rod 93 from the fixing seat 644 and pull the semi-circular arc plate 91 out of the mounting tube 61. The semi-circular arc plate 91 can be taken out. Then separate the two sets of semi-circular arc plates 91 to expose the extrusion component 95 inside the semi-circular arc plate 91. Then loosen the screw 952 so that the limit rod 956 fits against the inner side of the adjusting arc plate 944. Then rotate the mounting rod 951. The extrusion arc surface 955 will rotate around the center of gravity of the waist-shaped roller 954. This ensures that the center of gravity position of the three sets of waist-shaped rollers 954 remains unchanged after the angle is adjusted and they are still spirally distributed. This prevents them from separating from the PTFE film on the outside of the 1 during use. This allows the equipment to adapt to the production of signal lines with different wrapping angles and overlaps, improving the applicability of the equipment.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A highly insulated signal harness, characterized in that, It includes a conductor (1), a PTFE membrane layer (2), a metal braided shielding layer (3), and a sheath layer (4) arranged sequentially from the inside out. The conductor (1) is made of 12 strands of tin-plated copper monofilaments with a diameter of 0.08 mm twisted together; The PTFE film layer (2) is made by spirally overlapping PTFE films with a size of 5.5mm × 0.035mm on the outside of the stranded conductor layer, and the overlap rate of the PTFE films is greater than 40%. The metal braided shielding layer (3) is a 16-spindle braided structure, each spindle is made of 3 tin-plated copper monofilaments with a diameter of 0.10mm braided together, and is completely wrapped around the outside of the PTFE membrane wrapping insulation layer. The sheath layer (4) is formed by extrusion of FEP material with a melt index of 20 to 22, and the long-term service temperature of the sheath is 150 degrees.

2. The highly insulated signal harness according to claim 1, characterized in that, The ratio of the number of tin-plated copper monofilaments to the number of silver-plated copper monofilaments can be adjusted according to the operating conditions. Before extrusion molding, the FEP raw material for preparing the sheath layer (4) is dried at 130 degrees for at least 2 hours.

3. The PTFE film winding and packaging equipment for a high-insulation signal wire harness according to claim 2, characterized in that, The package includes a wrapping section (5), a preheating component (6) is provided on one side of the wrapping section (5) at intervals, a cooling section (7) is provided at one end of the preheating component (6), a driving component (8) is embedded at the end of the preheating component (6) connected to the cooling section (7), an exhaust component (9) is provided inside the preheating component (6), and the driving component (8) is connected to one end of the exhaust component (9). The conductor (1) passes through the wrapping section (5), the preheating component (6), the exhaust component (9), the driving component (8) and the cooling section (7) in sequence. The preheating component (6) includes a mounting pipe (61) detachably disposed at one end of the cooling section (7). A clearance groove is provided between the mounting pipe (61) and the cooling section (7) for the drive component (8) to run. Both ends of the mounting pipe (61) are detachably connected to a fixing plate (62). Both the mounting pipe (61) and the fixing plate (62) are made of heat-insulating material. A set of fixing plates (62) near the wrapping section (5) is fixedly connected to a limiting sleeve (63) at the end facing the wrapping section (5). A guide component (64) is provided inside the mounting pipe (61), and one end of the guide component (64) penetrates the mounting pipe (61). An exhaust pipe (65) is fixedly connected through the outer surface of the mounting pipe (61). One end of the exhaust pipe (65) is connected to an external gas recovery heating device.

4. The PTFE film winding and packaging equipment for high-insulation signal wire harnesses according to claim 3, characterized in that, The guide component (64) includes a rotating disk (641) that is rotatably connected to the inner wall of the mounting pipe (61). A flow groove (645) is provided on the outer surface of the rotating disk (641). An air inlet pipe (642) is fixedly connected through the outer surface of the mounting pipe (61). The air inlet end of the air inlet pipe (642) is connected to an external gas recovery heating device. The air outlet end of the air inlet pipe (642) is located inside the flow groove (645). An air outlet pipe (643) is fixedly connected through the inner side of the rotating disk (641). Multiple sets of air outlet pipes (643) are arranged in a ring array. The flow groove (645) and the inner side of the rotating disk (641) are connected through multiple sets of air outlet pipes (643). Two sets of fixed seats (644) are fixedly connected at intervals at one end of the rotating disk (641) near the exhaust assembly (9).

5. The PTFE film winding and packaging equipment for high-insulation signal wire harnesses according to claim 4, characterized in that, The drive assembly (8) includes a fixing block (81) that is detachably and fixedly connected to the inner wall of the end where the mounting tube (61) connects to the cooling section (7). The lower end of the fixing block (81) is fixedly connected to a mounting seat (82). One end of the mounting seat (82) is rotatably connected to a pulley (83). The drive assembly (8) also includes a drive part (84) mounted on an external bracket, and the drive part (84) is in contact with the outer surface of the pulley (83).

6. The PTFE film winding and packaging equipment for high-insulation signal harnesses according to claim 5, characterized in that, The exhaust assembly (9) includes a transmission rod (92) detachably fixedly connected to one end of a pulley (83), and two sets of transmission rods (92) are symmetrically arranged. A semi-circular arc plate (91) is fixedly connected to the end of each set of transmission rods (92). Multiple through holes are opened on the outer surface of the semi-circular arc plate (91). The two sets of semi-circular arc plates (91) are symmetrically arranged and their contact surfaces are fixedly connected by bolts. Two sets of connecting rods (93) are fixedly connected at intervals to the inner wall of the end of the semi-circular arc plate (91) away from the transmission rod (92), and the two sets of connecting rods (93) are respectively engaged with two sets of fixed seats (644). 91) An adjusting component (94) and a uniform component (96) are provided on the inner side. The adjusting component (94) is arranged in three sets at intervals, and the uniform component (96) is arranged in four sets at intervals. The adjusting component (94) and the uniform component (96) are arranged in a spiral along the moving direction of the conductor (1). The angle difference between adjacent adjusting components (94) and uniform components (96) is 60 degrees. An extrusion component (95) is provided at one end of the adjusting component (94). The adjusting component (94) and the extrusion component (95) are both inclined relative to the axial direction of the conductor (1). The extrusion component (95) and the uniform component (96) are both in contact with the PTFE membrane.

7. The PTFE film winding and packaging equipment for high-insulation signal wire harnesses according to claim 6, characterized in that, The adjusting component (94) includes an installation strip (941) that is detachably and fixedly connected to the inner wall of the semi-circular arc plate (91). A first electric telescopic rod (942) is fixedly connected to one side of the installation strip (941). The first electric telescopic rod (942) has a built-in pressure detection structure. A sliding block (943) is fixedly connected to the lower end of the first electric telescopic rod (942). The sliding block (943) is engaged and slidably connected to one side of the installation strip (941). An adjusting arc plate (944) is fixedly connected to the lower end of the sliding block (943). Multiple sets of engaging grooves (945) are evenly opened on the outer surface of the adjusting arc plate (944). Through grooves (946) are opened through both sides of the adjusting arc plate (944).

8. The PTFE film winding and packaging equipment for high-insulation signal wire harnesses according to claim 7, characterized in that, The extrusion component (95) includes an installation rod (951) that movably passes through the through groove (946). One end of the installation rod (951) is threadedly connected to a screw (952). A limiting block (953) is movably connected through the screw (952). The limiting block (953) is engaged with the installation rod (951) and a set of the engagement grooves (945). The contact surface between the limiting block (953) and the adjusting arc plate (944) is provided with an anti-slip rubber layer. A limiting rod (956) is fixedly connected to the outer surface of the installation rod (951), and the limiting rod (956) contacts the inner side of the adjusting arc plate (944).

9. The PTFE film winding and packaging equipment for high-insulation signal wire harnesses according to claim 8, characterized in that, The mounting rod (951) is fixedly connected to a waist-shaped roller (954) on its outer surface. The waist-shaped roller (954) has a built-in temperature control structure. The temperature of the three sets of waist-shaped rollers (954) increases gradually along the direction of travel of the conductor (1) with a reference of 60 degrees and a difference of 40 degrees. An extrusion arc surface (955) is opened on the outer side of the waist-shaped roller (954). The center of the adjusting arc plate (944) is located at the center of gravity of the waist-shaped roller (954). The extrusion arc surface (955) is in inclined contact with the conductor (1), and the contact surface is consistent with the width direction of the PTFE film. A convex ring (957) is fixedly connected in the middle of the extrusion arc surface (955). The convex ring (957) divides the extrusion arc surface (955) into two sections. The two sections of the extrusion arc surface (955) are in contact with the overlapping positions of the left and right sides of the PTFE film, respectively. The convex ring (957) is in contact with the un-overlapped position of the PTFE film.

10. The PTFE film winding and packaging equipment for high-insulation signal harnesses according to claim 9, characterized in that, The uniform component (96) includes a connecting strip (961) that is detachably and fixedly connected to the inner side of the semi-circular plate (91). A second electric telescopic rod (962) is fixedly connected to one side of the connecting strip (961), and the second electric telescopic rod (962) has a built-in pressure detection structure. The lower end of the second electric telescopic rod (962) is rotatably connected to a straight roller (963) through a connecting block. The straight roller (963) has a built-in temperature control structure. The temperature of the four sets of straight rollers (963) decreases gradually along the direction of travel of the conductor (1) with a reference of 180 degrees and a difference of 30 degrees. The connecting block slides and engages with one side of the connecting strip (961). The straight roller (963) is set along the direction of movement of the conductor (1). The straight roller (963) is in contact with the PTFE membrane on the outside of the conductor (1).

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