CN211088627U - High-temperature-resistant cable assembly - Google Patents
High-temperature-resistant cable assembly Download PDFInfo
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- CN211088627U CN211088627U CN201922455373.9U CN201922455373U CN211088627U CN 211088627 U CN211088627 U CN 211088627U CN 201922455373 U CN201922455373 U CN 201922455373U CN 211088627 U CN211088627 U CN 211088627U
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Abstract
The utility model discloses a high temperature resistant cable subassembly belongs to the communication technology field, including connector and cable, the cable is the cable outer conductor, cable insulation layer, cable conductor core line respectively by outer to interior, the cable outer conductor has the sheath steel pipe outward, the connector includes first outer conductor and sets up inner conductor, first glass insulator, second outer conductor in the first outer conductor, the second outer conductor rear end passes through cable sheath steel pipe welding and seals, circle tight-fitting surface and the interior round tight-fitting surface reciprocal anchorage of second outer conductor in the first outer conductor, and first glass insulator is connected to second outer conductor front end, and inner conductor is connected to first glass insulator front end, is equipped with the first spacing step that is used for preventing first glass insulator drunkenness forward on the first outer conductor inner wall. The utility model discloses the gas tightness is good, solves the transmission problem of signal under special environment, prevents under the high temperature condition, and metal oxidation leads to the product to become invalid.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a high temperature resistant cable subassembly.
Background
The utility model relates to a high temperature resistant cable subassembly is an important component in signal transmission, and its function is except mechanical connection signal transmission system, more importantly high-quality ground transmission radio frequency energy and signal. With the rapid development of aerospace technology and nuclear power industry, the operating temperature of the special occasions, such as the flame spraying area of a carrier rocket, the nuclear island of a nuclear power station, the high-temperature area of a steel smelting furnace, the chemical reaction kettle, the side of a turbojet engine and the like, is required to exceed 600 ℃. Some domestic manufacturers also research high-temperature-resistant radio frequency connectors, and the high-temperature-resistant connectors are mainly designed and manufactured by adopting novel insulating materials such as ceramics, sintered glass and the like, but the air tightness of the assembly is difficult to realize; the sealed connector is realized by adopting a sealant and an injection molding rubber tube, but the assembly can only ensure sealing in a low-temperature environment, can melt and flow in a high-temperature environment and cannot ensure the sealing property.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a high temperature resistant cable subassembly, solve the transmission problem to the ultra-high temperature signal under special environment, prevent under the high temperature condition, metal oxidation leads to the product to become invalid, the heat-resisting temperature of solving current radio frequency coaxial connector is lower, can seriously influence the problem of cable subassembly performance under the high temperature operational environment that the temperature exceeds 600 ℃, therefore the invention realizes totally sealed with the subassembly is whole, avoids causing the oxidation of cable insulation part because the air will get into the cable inside.
The utility model provides a following technical scheme:
a high-temperature-resistant cable assembly comprises a connector and a cable, wherein the cable comprises a sheath steel pipe, a cable outer conductor, a cable insulating layer and a cable core wire from outside to inside, the connector comprises a first outer conductor, an inner conductor, a first glass insulator and a second outer conductor, the inner conductor, the first glass insulator and the second outer conductor are arranged in the first outer conductor, the second outer conductor is located at the rear end inside the first outer conductor, the front end of the second outer conductor is connected with the rear end of the first glass insulator, and the front end of the first glass insulator is connected with the rear end of the inner conductor;
the rear end of the second outer conductor is sealed through the sheath steel pipe, the inner circle tight-fitting surface of the first outer conductor and the outer circle tight-fitting surface of the second outer conductor are mutually fixed, the front end of the second outer conductor is connected with the first glass insulator, the front end of the first glass insulator is connected with the inner conductor, and a first limiting step used for preventing the first glass insulator from moving towards the inner conductor is arranged on the inner wall of the first outer conductor.
Adopt the cable subassembly of above-mentioned project organization, at first the second outer conductor rear end has welded the seal, can guarantee the gas tightness of connector rear end like this, secondly can realize that relative position is fixed between first glass insulator, second outer conductor and the first outer conductor.
Furthermore, the rear end of the inner conductor is provided with a slotted hole with the aperture smaller than the outer diameter of the cable core, and the kovar alloy has no elasticity at the high temperature of 600 ℃, so the traditional closing-up mode has no significance, and the contact is definitely poor, so the inner diameter is smaller than the outer diameter of the cable core, the contact reliability in the plugging and unplugging process is ensured, and the good contact of metal is ensured by adopting a slotted matching mode.
Furthermore, a threaded sleeve is arranged at the front section of the first outer conductor, a C-shaped clamping ring is arranged outside the threaded sleeve, and the C-shaped clamping ring is made of elastic material nickel-based high-temperature alloy. The snap ring is made of nickel-based high-temperature alloy, the elastic coefficient is unchanged in a high-temperature environment, the reliability of the joint thread sleeve is guaranteed, and the joint thread sleeve is prevented from falling off.
Preferably, the thread insert is made of stainless steel 316, so that the thermal expansion coefficient of the thread insert is close to that of each part at high temperature, 6 safety air holes are vertically distributed at one end of the thread insert, and the thread insert is fixed by penetrating a steel wire so as to prevent the thread insert from rotating and falling off under vibration.
Furthermore, the rear end of the second outer conductor is welded and sealed through the sheath steel pipe, the welding mode is brazing or laser welding, and the brazing is completely protected by nitrogen in the welding process flow, so that the oxidation and blackening of the welding part are avoided.
Further, the material of sheath steel pipe is the stainless steel, and the design has guaranteed the zero leakage of radio frequency simultaneously, the material of cable outer conductor and cable core is oxygen-free copper.
Furthermore, the inner conductor and the first outer conductor are made of kovar alloy 4J29, and the inner conductor and the first outer conductor are made of kovar alloy 4J29, so that a layer of compact oxide film can be formed on the metal surface through metal oxidation with the first glass insulator, the first glass insulator is tightly combined with the first glass insulator, the air tightness is good, and the air tightness of the front section part of the connector can be completely guaranteed.
Furthermore, the cable insulation layer adopts silicon dioxide powder, and the silicon dioxide has high temperature resistance and stable and unchanged performance in a high temperature state.
Furthermore, the end face of the cable is provided with a second glass insulator for blocking the cable insulating layer and the cable outer conductor.
Preferably, the second glass insulator is provided with a second limiting step which extends into and can block the cable outer conductor, and can block the outflow of the silicon dioxide powder.
The utility model has the advantages that:
above-mentioned high temperature resistant cable subassembly has realized holistic totally airtight, has good gas tightness, has avoidd and has caused the problem that the cable insulation part oxidation leads to transmission performance unstability or even became invalid because the air gets into cable inside to the design of cable outer conductor overcoat stainless steel pipe can realize that the zero radio frequency of subassembly reveals.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a cross-sectional view of a first embodiment of a high temperature resistant cable assembly of the present invention;
FIG. 2 is a diagram of the glass metallization sintering of the present invention;
fig. 3 is a cross-sectional view of a second embodiment of the high temperature resistant cable assembly of the present invention;
fig. 4 is a front view of the present invention;
fig. 5 is a cross-sectional view of the high temperature resistant cable assembly without the joint screw sleeve.
Reference numerals: 1. a cable core; 2. a cable insulation layer; 3. an outer conductor of the cable; 4. sheathing a steel pipe; 5. sealing the weld; 6. an inner circle tight fit surface; 7. a tight fitting surface of the excircle; 8. a second outer conductor; 9. a second limit step; 10. a second glass insulator; 11. a first outer conductor; 12. a first glass insulator; 13. a first limit step; 14. an inner conductor; 15. a threaded sleeve; 16. a safety vent; 17. a snap ring; 18. a polytetrafluoroethylene sheath.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the high temperature resistant cable assembly comprises a connector and a cable, the cable has a three-layer structure including an outer cable conductor 3, an insulating cable layer 2 and a cable core 1 from outside to inside, and the outer surface of the outer cable conductor 3 is wrapped by a stainless steel sheath steel pipe, so that zero radio frequency leakage can be guaranteed. The cable outer conductor and the cable electric core are made of oxygen-free copper, the cable insulating layer is made of silicon dioxide powder, and due to the high-temperature resistance of silicon dioxide, the design can ensure that the performance of the cable is stable and unchanged in a high-temperature state.
As shown in fig. 4, the cable outer conductor 3 is made of silica powder, and a second glass insulator 10 for receiving the cable insulating layer 2 and the cable outer conductor 3 is provided on the cable end surface in order to prevent the silica powder from flowing out.
As shown in fig. 1, the second glass insulator 10 preferably has a second limit step 9 which extends into and blocks the outer conductor of the cable.
The connector comprises a first outer conductor 11, a second outer conductor 8, an inner conductor 14 and a first glass insulator 12, the length of the connector being 18.7 mm. The inner circle close-fitting surface 6 of the first outer conductor 11 and the outer circle close-fitting surface 7 of the second outer conductor 8 are fixedly connected with each other to transmit electric signals.
The rear end of the second outer conductor 8 is welded and sealed through the sheath steel pipe, the sealing protection of the tail end of the connector is achieved through the welded sealing weld joint 5, and the welding mode can be brazing or laser welding.
A first glass insulator 12 is clamped between the front end of the second outer conductor 8 and a first limiting step 13 on the inner wall of the first outer conductor 11, and the first glass insulator 12 and the second outer conductor 8 can be fixed with each other through the design.
As shown in fig. 2, the front end of the first glass insulator 12 is connected to the inner conductor 14, the materials of the inner conductor 14 and the first outer conductor 11 are all kovar alloy 4J29, a teflon sheath is arranged between the inner conductor 14 and the first outer conductor 11, and the teflon sheath and the first glass insulator 12 can be oxidized by metal to form a dense oxide film on the surface of the metal, which can be tightly bonded to the first glass insulator, so that the front end of the connector is hermetically protected. A professional graphite tool is required to be used for supporting in the whole metallization process, and meanwhile, the sintering process is controlled.
Through the mode, the front end and the rear end of the connector are protected in a sealed mode, the assembly is completely sealed integrally, and good air tightness is obtained.
The rear end of the inner conductor 14 is provided with a slot hole having a smaller diameter than the outer diameter of the cable core 1. Because at 600 ℃ high temperature, kovar alloy does not have elasticity, and the closing-in mode in the past has no significance, so adopt the internal diameter to be less than cable conductor 1 external diameter, guarantee the reliability of contact in the middle of the plug process to adopt the mode of fluting complex to guarantee that the contact of metal is good.
As shown in fig. 4 and 2, a threaded sleeve 15 is arranged at the front end of the first outer conductor 11, the diameter of the threaded sleeve 15 is 9 mm, a snap ring 17 matched with the threaded sleeve 15 is arranged on the threaded sleeve 15, the snap ring 17 is C-shaped, and the snap ring 17 is made of elastic material nickel-based high-temperature alloy, so that the snap ring 17 can keep the elastic coefficient unchanged in a high-temperature working environment, the reliability of the joint threaded sleeve 15 is ensured, and the joint threaded sleeve 15 is prevented from falling off.
As shown in figure 1, six safety air holes 16 are vertically distributed at the front end of the screw sleeve 15, and the screw sleeve can be prevented from whirling and falling off under vibration by penetrating and fixing a steel wire.
The utility model discloses a concrete working method:
the high-temperature-resistant cable assembly is connected with an electric appliance needing information transmission and can be used after being electrified, the front end and the rear end of a connector of the high-temperature-resistant cable assembly are hermetically protected, the assembly is completely sealed integrally, good air tightness is obtained, the problem that partial oxidation of the cable is caused due to the fact that air enters the inside of the cable under the high-temperature condition is solved, stable information transmission under the high-temperature condition is achieved, meanwhile, a sheath steel pipe 4 wraps the cable outside, and zero radio frequency leakage can be guaranteed.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high temperature resistant cable assembly characterized by: the assembly comprises a connector and a cable, wherein the cable comprises a cable outer conductor, a cable insulating layer and a cable core wire from outside to inside, a jacket steel pipe is arranged outside the cable outer conductor, the connector comprises a first outer conductor, an inner conductor arranged in the first outer conductor, a first glass insulator and a second outer conductor, the second outer conductor is positioned at the rear end inside the first outer conductor, the front end of the second outer conductor is connected with the rear end of the first glass insulator, and the front end of the first glass insulator is connected with the rear end of the inner conductor;
the rear end of the second outer conductor is sealed through the sheath steel pipe, the inner circle tight-fitting surface of the first outer conductor and the outer circle tight-fitting surface of the second outer conductor are fixed with each other, and a first limiting step used for preventing the first glass insulator from moving towards the inner conductor is arranged on the inner wall of the first outer conductor.
2. A high temperature resistant cable assembly as recited in claim 1, wherein: and a slotted hole with the aperture smaller than the outer diameter of the cable core wire is formed at the rear end of the inner conductor.
3. A high temperature resistant cable assembly as recited in claim 1, wherein: the front end of the first outer conductor is provided with a threaded sleeve, a C-shaped clamping ring is arranged outside the threaded sleeve, and the C-shaped clamping ring is made of elastic material nickel-based high-temperature alloy.
4. A high temperature resistant cable assembly as recited in claim 3, wherein: the screw sleeve is made of stainless steel 316, and 6 safety air holes are vertically distributed at the front end of the screw sleeve.
5. A high temperature resistant cable assembly as recited in claim 1, wherein: and the rear end of the second outer conductor is welded and sealed through the sheath steel pipe, and the welding mode is brazing or laser welding.
6. A high temperature resistant cable assembly as recited in claim 1, wherein: the material of sheath steel pipe is stainless steel, the material of cable outer conductor and cable core is oxygen-free copper.
7. A high temperature resistant cable assembly as recited in claim 1, wherein: the material of the inner conductor and the first outer conductor is kovar alloy 4J 29.
8. A high temperature resistant cable assembly as recited in claim 1, wherein: the cable insulation layer adopts silicon dioxide powder.
9. A high temperature resistant cable assembly as recited in claim 1, wherein: the cable end face is provided with a second glass insulator for blocking the cable insulating layer and the cable outer conductor.
10. A high temperature resistant cable assembly as recited in claim 9, wherein: the second glass insulator is provided with a second limiting step which extends into and can block the cable outer conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922455373.9U CN211088627U (en) | 2019-12-30 | 2019-12-30 | High-temperature-resistant cable assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922455373.9U CN211088627U (en) | 2019-12-30 | 2019-12-30 | High-temperature-resistant cable assembly |
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| Publication Number | Publication Date |
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| CN211088627U true CN211088627U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922455373.9U Active CN211088627U (en) | 2019-12-30 | 2019-12-30 | High-temperature-resistant cable assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323444A (en) * | 2021-12-07 | 2022-04-12 | 北京无线电计量测试研究所 | High-temperature-resistant sealed cavity testing device and configuration method |
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2019
- 2019-12-30 CN CN201922455373.9U patent/CN211088627U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323444A (en) * | 2021-12-07 | 2022-04-12 | 北京无线电计量测试研究所 | High-temperature-resistant sealed cavity testing device and configuration method |
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