High-temperature-resistant flexible armored twisted-pair signal transmission element

Abstract

The utility model discloses a high-temperature-resistant flexible armored twisted-pair signal transmission element, and relates to the technical field of signal transmission. The cable specifically comprises an outer protective sleeve, a core rod and an insulating layer. The core rods are arranged in the outer protective sleeve in a sleeving manner, the two core rods are mutually twisted, and the twisting pitch of the core rods is 35-75 mm; the insulating layer is filled into a gap between the outer protective sleeve and the core rod; wherein the outer protective sleeve is made of stainless steel or nickel-based alloy materials, and the transmission element is drawn and annealed to form the cable with the outer diameter smaller than 3.0 mm. The core rods which are mutually twisted are sleeved in the outer protective sleeve, the insulating layer is arranged between the core rods and the outer protective sleeve, the core rods are mutually twisted, and the twisting pitch between the core rods is 35-70mm, so that the overall twisting speed is ensured, the production efficiency of the twisted cable is improved, the overall anti-interference capability of the cable is further improved, and the service life of the cable is prolonged. And the flexibility requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal transmission technical field, especially a kind of high-temperature-resistant flexible armored twisted pair type signal transmission element. BACKGROUND

[0002] Signal transmission element refers to the component or device used for transmitting signals in electronic systems, communication networks or computer systems. The function of these elements is to transmit signals (such as voltage, current or optical signals) from one point to another, usually used to connect various electronic devices, ensuring the integrity and reliability of signals during transmission.

[0003] With the vigorous development of contemporary industrial technology, the requirements for wired signal transmission cables are becoming more and more diverse. Twisted pair cables have the advantages of low loss, strong anti-interference ability and small crosstalk during signal transmission, can transmit various digital signals and analog data, and can reduce radiation, prevent information from being eavesdropped, and also prevent external electromagnetic interference from entering, making the shielded twisted pair cable have higher transmission rate than similar non-shielded twisted pair cable, so it is widely used in the market.

[0004] However, in the above-mentioned scheme, our production can meet the needs of most customers, but it is difficult to meet the needs of some customers, so we propose some problems for this problem, the specific problem is that although the commercially available twisted pair cable is light in weight and flexible, its temperature does not exceed 300 DEG C, when the temperature exceeds, the insulation material of the transmission element ages and degrades, thereby reducing its insulation performance, and also causing the shielding layer to be damaged, weakening or eliminating its shielding effect.

[0005] Therefore, the present application aims to improve the flexibility of the transmission element while ensuring the anti-interference performance of the transmission element under the condition of exceeding 300 DEG C. SUMMARY

[0006] The main purpose of the utility model is to provide a kind of high-temperature-resistant flexible armored twisted pair type signal transmission element, aims to improve the flexibility of the transmission element, also ensure the anti-interference performance of the transmission element.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a kind of high-temperature-resistant flexible armored twisted pair type signal transmission element, comprising:

[0008] outer protective sleeve;

[0009] core rod, which is sleeved in the inside of the outer protective sleeve, two core rods are twisted with each other, the pitch of the twisted core rod is 35mm-75mm;And

[0010] insulating layer, filled into the gap between the outer protective sleeve and the core rod.

[0011] The outer protective sleeve is made of stainless steel or nickel-based alloy material, and the transmission element is processed by drawing and annealing to form a cable with an outer diameter less than 3.0 mm.

[0012] Preferably, the two ends of the core rod extend outwardly towards the end of the outer protective sleeve, and the extended part is fixed with a lead-out terminal.

[0013] Preferably, the outer protective sleeve is provided with an end sleeve at each end, the end sleeve is sleeved on the two ends of the core rod, and the cavity of the end sleeve can be filled with sealing material.

[0014] Preferably, one end of the lead-out terminal is crimped on the end of the core rod, and the other end extends out of the cavity of the end sleeve.

[0015] Preferably, the end sleeve is made of stainless steel material.

[0016] Preferably, the sealing material is glass powder.

[0017] Preferably, the insulation layer is a prefabricated insulation porcelain column, and the core rod penetrates through several insulation porcelain columns.

[0018] The above technical scheme has the following advantages:

[0019] The core rod is sleeved in the outer protective sleeve by mutual twisting, and an insulation layer is arranged between the core rod and the outer protective sleeve. The core rods are twisted with each other, so that the twisting pitch between the core rods is between 35mm-70mm, thereby ensuring the twisting rate of the whole, improving the production efficiency of the twisted cable, further improving the anti-interference ability of the whole cable, meeting the flexibility requirement, avoiding the over-thick outer diameter of the mineral cable due to its high-temperature resistance, affecting the flexibility of the whole cable structure, and not easy to bend and layout. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be explained in detail below by combining with specific embodiments and drawings, in which:

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Figure 2 It is a processing flow schematic view of the utility model.

[0023] In the drawing: 1, outer protective sleeve; 2, core rod; 3, end sleeve; 4, lead-out terminal. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0025] like Figure 1 As shown, a high-temperature resistant flexible armored twisted-pair signal transmission element comprises an outer protective sleeve 1, a core rod 2 and an insulating layer; the core rod 2 is sleeved inside the outer protective sleeve 1, and the two core rods 2 are twisted with each other, and the pitch of the core rod 2 twisting is 35mm-75mm; the insulating layer fills the gap between the outer protective sleeve 1 and the core rod 2; wherein, the outer protective sleeve 1 is made of stainless steel or nickel-based alloy material, and the transmission element is drawn and annealed to form a cable with an outer diameter of less than 3.0mm. The stainless steel or nickel-based alloy material improves the protection performance of the outer protective sleeve 1 and also improves the high-temperature resistance. The core rod 2 is used to play a conductive role. The core rod 2 is made of pure copper or pure nickel to improve the conductivity of the core rod 2. After twisting, the core rod 2 can greatly improve The insulation characteristics of the transmission element are improved, thereby improving the overall high temperature resistance and insulation performance. As for the pitch setting between the core rods 2, the setting scheme selects a pitch of 35mm-75mm. When 35mm is selected, the pitch is smaller, the stranded wire of the core rod 2 is softer and tightly twisted. Although it has strong anti-interference ability, it is easy to cause deformation or cracking in the drawing production process; if a pitch of 50mm is selected, it not only saves the overall material and has anti-interference ability, but also avoids the problem of the stranded wire being too tight and easy to deform or crack during twisting, and can also improve the twisting production efficiency during twisting; if the pitch is selected as 75mm, the twisting production efficiency is high at this time, but the overall anti-interference ability is reduced, affecting the stability of the signal.

[0026] It should be noted that the outer protective cover 1 is made of stainless steel or nickel-based alloy material to form an armor layer of the twisted pair signal transmission element, which is used to protect the entire transmission element. The outer diameter of the transmission element is less than 3.0 mm, which can greatly improve the flexibility of the entire transmission element and ensure that the transmission element can be bent to different angles during wiring, thereby improving the convenience of wiring.

[0027] Both ends of the core rod 2 extend outward from the end of the outer protective sleeve 1, and the extended part is fixed with a lead terminal 4, which is used to connect the core rod 2. One end of the lead terminal 4 is crimped to the end of the core rod 2. The lead terminal 4 can be made of a nickel tube or a copper tube to facilitate wiring operations.

[0028] Both ends of the outer protective sleeve 1 are provided with end sleeves 3, which are sleeved on both ends of the core rod 2. The cavity of the end sleeve 3 can be filled with sealing material. The end sleeve 3 is made of stainless steel, and the sealing material is glass powder, and ferrite or ceramic material can also be used.

[0029] The insulation layer adopts prefabricated insulation porcelain column, the core rod 2 penetrates through several insulation porcelain columns, so as to realize the insulation effect, and also facilitates the pre-processing of the core rod 2 and the insulation layer. The insulation layer can also adopt cross-linked polyethylene and silicone rubber materials to improve the insulation effect.

[0030] As shown in Figure 2 Figure 1, the embodiment 1 of the present application

[0031] (1) According to the setting product outer diameter of 2.5mm, select the outer diameter of 12.7mm Incone l 600 pipe material, assemble the prefabricated insulation porcelain column with the outer diameter of 9.5mm*2mm*3.0mm and the pure nickel core rod 2, calculate to meet the assembly requirements, the outer diameter of the core rod 2 is 1.8 to 2.2mm, and the mineral insulated cable is formed after assembly.

[0032] (2) After the raw material assembly is completed, the mineral insulated cable is drawn on the drawing machine. When the outer diameter is greater than 6.0mm, the mineral insulated cable is drawn according to 9.6mm, 8.5mm, 7.7mm, 7.0mm, 6.4mm drawing pass, and annealed once in the pipe furnace after each drawing; when the outer diameter is less than 6.0mm, the drawing extension rate is controlled at 6% to 12% according to 5.8mm, 5.3mm, 4.8mm, 4.4mm, 4.1mm, 3.8mm, 3.5mm, 3.2mm, 2.9mm, 2.7mm, 2.5mm each pass.

[0033] (3) Each drawing needs to be annealed, and when the outer diameter is less than 6.0mm, the cable is stranded on the stranding machine every other pass, and needs to be annealed again after stranding. The stranding pitch is set at 40 to 70mm, and the main shaft speed is set at 100 to 200rpm. The annealing speed is 0.4 to 2.2m / min, the smaller the cable outer diameter, the faster the annealing speed; the annealing temperature is 950 to 1100℃.

[0034] (4) After multiple drawing, stranding and annealing, the cable product is obtained, and the product outer diameter is 2.5±0.03mm. After detection, 10m long cables are taken respectively, and the outer protective sleeve 1 at both ends is peeled off to expose the core rod 2, and the length is 20 to 25mm.

[0035] (5) When the outer diameter is 2.5mm, the cable core rod 2 diameter is about 0.5mm, which is difficult to meet the wiring requirements. A nickel tube or copper tube with a diameter of 1.4 to 1.6mm and a length of 20 to 30mm needs to be crimped on the core rod 2 as a lead-out wire. When crimping, ensure that the nickel tube or copper tube starts 2 to 3mm away from the outer protective sleeve 2.

[0036] (6) The end protective sleeve 3 of stainless steel material is sleeved on the cable, and the mold is crimped to fix the end protective sleeve 3 to the cable.

[0037] (7) Use a hot gun to dry the cable cut 30 to 50 cm away, measure the insulation resistance. After the cable insulation treatment is qualified, seal the glass powder in the end sheath 3, and heat the glass powder with high frequency. After the glass powder is melted, slowly cool and solidify. Repeat 3 to 4 times until the solidified glass powder completely fills the inside of the end sheath 3.

[0038] (8) After sealing, polish the end sheath 3, and measure the room temperature insulation resistance and high temperature insulation resistance above 300℃ after soaking in water for 1h.

[0039] As shown in Figure 2 , as embodiment 2

[0040] (1) According to the set finished product outer diameter of 2.0mm, select the outer diameter of 12.7mm Inconel 600 pipe material, assemble the prefabricated insulation porcelain column with the outer diameter of 9.5mm*1mm*2.5mm and the pure nickel core rod 2, and calculate to meet the assembly requirements. The outer diameter of the core rod 2 is 1.8 to 2.0mm, and the mineral insulated cable is formed.

[0041] (2) After the assembly of raw materials is completed, the mineral insulated cable is drawn on the drawing machine. When the outer diameter is greater than 6.0mm, the mineral insulated cable is drawn according to the drawing pass of 9.6mm, 8.5mm, 7.7mm, 7.0mm, 6.4mm, and each drawing is annealed once in the tube furnace; when the outer diameter is less than 6.0mm, the drawing is carried out according to 5.8mm, 5.3mm, 4.8mm, 4.4mm, 4.1mm, 3.8mm, 3.5mm, 3.2mm, 2.9mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 2.0mm.

[0042] (3) After each drawing, annealing is required. When the outer diameter is less than 6.0mm, the core rod 2 is stranded on the stranding machine every other pass, and annealing is required again after the stranding is completed. The stranding pitch is set to 40 to 70mm, and the main shaft speed is set to 100 to 200rpm. The annealing speed is 0.4 to 2.2m / min, and the smaller the cable outer diameter, the faster the annealing speed; the annealing temperature is 950 to 1100℃.

[0043] (4) After multiple drawing, stranding and annealing, the finished product outer diameter is 2.5±0.03mm. After detection, take 15m long cable respectively, peel off the outer protective sleeve 1 at both ends, expose the core rod 2, and the length is 20 to 25mm.

[0044] (5) When the outer diameter is 2.5 mm, the cable core rod 2 is about 0.4 mm in diameter, which is difficult to meet the wiring requirements. A nickel tube or a copper tube with a diameter of 1.4 to 1.6 mm and a length of 20 to 30 mm is needed to be crimped on the core rod 2 as a lead-out wire. When crimping, the nickel tube or the copper tube is ensured to be 2 to 3 mm away from the outer protective sleeve 2 at the start.

[0045] (6) The end protective sleeve 3 made of stainless steel is sleeved on the cable, and the joint is fixed to the cable by crimping with a mold.

[0046] (7) The cable cut part is dehumidified by a hot air gun for a distance of 30 to 50 cm, and the insulation resistance is measured. After the cable insulation treatment is qualified, the glass powder is sealed in the end protective sleeve 3, and the glass powder is heated by high frequency heating. After the glass powder is melted, it is slowly cooled and solidified. Repeat 3 to 4 times until the solidified glass powder completely fills the inside of the end protective sleeve 3.

[0047] (8) After sealing, the end protective sleeve 3 is polished, and the normal temperature insulation resistance and the high temperature insulation resistance above 300 DEG C are measured after immersion in water for 1 h.

[0048]

[0049] It can be seen from the table that for the cable with a temperature exceeding 300 DEG C, the cable produced by example 1 and example 2 of the application completely meets the requirements, and the commercially available polyimide and polyether ether ketone cables are all in the insulation layer, which cannot meet the high temperature resistance requirement.

[0050] The above only describes the preferred embodiments of the application, and does not limit the patent range of the application. Any equivalent structural transformation or direct / indirect application in other related technical fields under the application concept of the application is included in the patent protection range of the application.

Claims

1. A high temperature resistant flexible armored twisted pair signal transmission element, characterized by, The utility model relates to a kind of cable, including: Outer protective sleeve (1); Core rod (2), it is sleeved in the inside of the outer protective sleeve (1), two the core rod (2) are twisted with each other, the pitch of the core rod (2) twist is 35mm-75mm;And Insulating layer is filled to the gap of the outer protective sleeve (1) and the core rod (2); Wherein, the outer protective sleeve (1) is made of stainless steel or nickel-based alloy material, the transmission element is drawn and annealed, and the cable with outer diameter less than 3.0mm is formed.

2. The high temperature resistant flexible armored twisted pair signal transmission element of claim 1, wherein, Two ends of the core rod (2) are extended to the end of the outer protective sleeve (1) outward, and the extended part is fixed with lead-out terminal (4).

3. The high temperature resistant flexible armored twisted pair signal transmission element of claim 2, wherein, One end of the lead-out terminal (4) is crimped in the end of the core rod (2).

4. The high temperature resistant flexible armored twisted pair signal transmission element of claim 1, wherein, Two ends of the outer protective sleeve (1) are each equipped with end sheath (3), the end sheath (3) is sleeved in two ends of the core rod (2), and the cavity of the end sheath (3) can be filled with sealing raw material.

5. The high temperature resistant flexible armored twisted pair signal transmission element of claim 4, wherein, The end sheath (3) is made of stainless steel material.

6. The high temperature resistant flexible armored twisted pair signal transmission element of claim 4, wherein, The sealing raw material uses glass powder.

7. The high temperature resistant flexible armored twisted pair signal transmission element of claim 1, wherein, The insulating layer uses prefabricated insulating porcelain column, and the core rod (2) penetrates several insulating porcelain columns.

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