CN108054538B

CN108054538B - Coaxial cable assembly

Info

Publication number: CN108054538B
Application number: CN201711083379.7A
Authority: CN
Inventors: 屈晓松; 王慧峰; 华青; 张力敏; 石岩
Original assignee: Beijing Institute of Radio Metrology and Measurement
Current assignee: Beijing Institute of Radio Metrology and Measurement
Priority date: 2017-11-07
Filing date: 2017-11-07
Publication date: 2021-03-30
Anticipated expiration: 2037-11-07
Also published as: CN108054538A

Abstract

The application discloses coaxial cable subassembly, including connector and cable, wherein the connector includes N type nut, snap ring, outer conductor and inner conductor, and the cable includes heart yearn and crust. The outer conductor and the inner conductor are connected through glass sintering to improve the heat resistance, and in order to realize the sintering process, the inner conductor and the outer conductor are of split structures. The outer conductor includes a first outer conductor and a second outer conductor, and the inner conductor includes a first inner conductor, a second inner conductor, and a third inner conductor. All component center shafts are located on the same axis, and the N-shaped nut is arranged outside the first outer conductor and connected with the outer conductor through a clamping ring. The first outer conductor and the second outer conductor, the first inner conductor and the second inner conductor and the third inner conductor are connected in an interference fit mode. The cable core wire is elastically clamped and connected with the third inner conductor, and the cable sheath is connected with the first outer conductor in an electron beam welding mode, so that the sealing performance of the connector is improved. The coaxial cable assembly can normally work at the temperature of-65-400 ℃.

Description

Coaxial cable assembly

Technical Field

The invention relates to the field of radio frequency, in particular to a coaxial cable assembly.

Background

Coaxial cables are often used for device-to-device connections, or in bus-type network topologies. The coaxial cable needs to be connected with equipment through the radio frequency connector in the application process, and the radio frequency connector on the market at present has poor high temperature resistance and sealing performance. In a high-temperature and high-humidity environment, water vapor easily enters the cable, so that the insulation and voltage resistance indexes of the cable are reduced, and the power capacity is reduced. In severe cases, short circuits and even system damage can occur.

Therefore, some domestic manufacturers also carry out some researches on the high-temperature resistant radio frequency connector, and the high-temperature resistant connector is 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.

Therefore, the invention provides a novel high-temperature-resistant sealing type coaxial cable assembly, which is applicable to a temperature range of-65-400 ℃.

Disclosure of Invention

The embodiment of the application provides a coaxial cable assembly for solve the problem that current coaxial cable assembly can not resist high temperature or be not sealed.

The embodiment of the application adopts the following technical scheme:

the utility model provides a coaxial cable subassembly, includes connector and cable, and wherein the connector includes N type nut, snap ring, outer conductor and inner conductor, and the cable includes heart yearn and crust, all part center pins are located same axis, and N type nut sets up and passes through the snap ring at the outer conductor outside and be connected with the outer conductor, and the outer conductor passes through glass sintering fixed connection with the inner conductor, and the cable heart yearn is connected with inner conductor elasticity centre gripping, and the cable crust passes through electron beam welding with the outer conductor and is connected.

Preferably, the cable core and the sheath are conductors, and a silicon dioxide medium is filled between the core and the sheath.

Preferably, the outer conductor is of a split structure and comprises a first outer conductor and a second outer conductor;

the first outer conductor comprises a cylindrical part with a larger left end diameter and a smaller right end diameter, a through hole is formed in the cylindrical part, the second outer conductor comprises a cylindrical part with a smaller left end diameter and a cylindrical part with a larger right end diameter, a through hole is also formed in the second outer conductor, and the cylindrical part at the right end of the second outer conductor is inserted into the groove of the cylindrical part at the left end of the first outer conductor and is connected with the first outer conductor in an interference fit mode.

Preferably, the inner conductor adopts a split structure and comprises a first inner conductor, a second inner conductor and a third inner conductor, wherein the first inner conductor is a cylinder, the second inner conductor comprises a conical part at the left end and a cylindrical part with a groove at the right end, the diameter of the bottom surface of the conical part is smaller than that of the cylindrical part, the cylindrical part with the groove at the left end and the groove at the right end is arranged at the left end and the right end of the third inner conductor, the left end of the first inner conductor is inserted into the groove at the right end of the second inner conductor and is connected with the first inner conductor in an interference fit manner, and the right end of the first inner conductor is inserted into the groove at the left end of the third inner.

Preferably, the cable sheath is connected with the right end of the first outer conductor through electron beam welding, and the cable core is inserted into the groove at the right end of the third inner conductor and is elastically clamped and connected with the groove.

Preferably, an air medium is filled between the second outer conductor and the second inner conductor, and the third inner conductor and

an air medium is filled between the first outer conductors.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

the glass sintering connection mode can ensure the use stability of the connector in a high-temperature environment, and the first outer conductor and the cable outer conductor are locally heated by adopting an electron beam welding method to melt metal to form a fusion metal layer. The structure stability in the high-temperature environment can be guaranteed, and the fusion metal layer guarantees that the interior of the cable is hermetically sealed with the outside.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a block diagram of a coaxial cable assembly according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a structural view of a coaxial cable assembly according to an embodiment of the present application, and as shown in fig. one embodiment of the present application, provides a coaxial cable assembly including: the connector 1 and the cable 2, wherein the connector 1 comprises an N-shaped nut 10, a snap ring 11, an outer conductor 12 and an inner conductor 13, the cable comprises a core wire 20 and an outer skin 21, and an insulating layer 22 is filled between the core wire 20 and the outer skin 21.

The N-shaped nut 10 is connected with an outer conductor 12 through a snap ring 11, the outer conductor 12 is connected with an inner conductor 13 through glass sintering, a cable core 20 is connected with the inner conductor, and an outer sheath 21 is connected with the outer conductor 12.

Specifically, in order to connect the outer conductor 12 and the inner conductor 13 by glass sintering, the outer conductor 12 and the inner conductor 13 adopt a split structure, the outer conductor 12 includes a first outer conductor 120 and a ground outer conductor 121, the inner conductor 13 includes a first inner conductor 130, a second inner conductor 131 and a third inner conductor 132, and the first inner conductor 130 and the first outer conductor 120 connect the inner conductor 13 and the outer conductor 12 together by the sintered glass 3.

The first outer conductor 120 includes a cylindrical portion 125 having a larger diameter at the left end and a cylindrical portion 120b having a smaller diameter at the right end, and a through hole 129 is provided inside the first outer conductor 120. The outer surface of the cylindrical portion 125 is provided with an annular groove 128, and the left end is provided with a groove 127. The second outer conductor 121 includes a columnar portion 123 having a smaller diameter at a left end and a columnar portion 124 having a larger diameter at a right end, and a through hole 122 is provided inside the second outer conductor 121. The cylindrical portion 124 at the right end of the second outer conductor 121 is inserted into the groove 127 of the cylindrical portion 125 at the left end of the first outer conductor 120, and the first outer conductor 120 and the second outer conductor 121 are connected in an interference fit manner. The snap ring 11 is fixed in the annular groove 128 of the outer surface of the left end cylindrical portion 125 of the first outer conductor 120, and connects the N-nut 10 and the first outer conductor 120. The cable sheath 21 is inserted into the through hole 129 of the columnar portion 120b at the right end of the first outer conductor 120, and is connected to the first outer conductor by electron beam welding. The first outer conductor 120 and the cable sheath 21 may be locally heated by electron beam welding, melting the metal and forming a layer of fused metal. To ensure that the interior of the cable 2 is hermetically sealed from the outside.

The first inner conductor 130 is a cylinder, the second inner conductor 131 includes a tapered portion 133 at the left end and a cylindrical portion 134 with a groove 135 at the right end, the diameter of the bottom of the tapered portion 133 is smaller than that of the cylindrical portion 134, and the third inner conductor 132 is a cylinder with

grooves

136 and 137 at the left and right ends. The left end of the first inner conductor 130 is inserted into the groove 135 of the right end column part 134 of the second inner conductor 131 and connected with the groove in an interference fit manner, and the right end of the first inner conductor 130 is inserted into the groove 136 of the left end of the third inner conductor 132 and connected with the groove in an interference fit manner. The cable core 20 is inserted into the recess 137 at the right end of the third inner conductor 132 and connected thereto by means of elastic clamping.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A coaxial cable assembly, comprising: the cable comprises a connector and a cable, wherein the connector comprises an N-shaped nut, a clamping ring, an outer conductor and an inner conductor, and the cable comprises a core wire and an outer skin;

the central shafts of all the components are positioned on the same axis;

the N-shaped nut is arranged outside the outer conductor and is connected with the outer conductor through a clamping ring;

the outer conductor adopts a split structure and comprises a first outer conductor and a second outer conductor;

the first outer conductor comprises a columnar part with a larger left end diameter and a groove and a columnar part with a smaller right end diameter, a through hole is formed in the first outer conductor, the second outer conductor comprises a columnar part with a smaller left end diameter and a columnar part with a larger right end diameter, and a through hole is also formed in the second outer conductor;

the right end columnar part of the second outer conductor is inserted into the groove of the left end columnar part of the first outer conductor and is connected with the groove in an interference fit manner;

the inner conductor adopts a split structure and comprises a first inner conductor, a second inner conductor and a third inner conductor;

the first inner conductor is a cylinder, the second inner conductor comprises a conical part at the left end and a cylindrical part with a groove at the right end, the diameter of the bottom surface of the conical part is smaller than that of the cylindrical part, and the third inner conductor is a cylinder with grooves at the left end and the right end;

the left end of the first inner conductor is inserted into the groove at the right end of the second inner conductor and is connected with the groove in an interference fit manner;

the right end of the first inner conductor is inserted into the groove at the left end of the third inner conductor and is connected with the groove in an interference fit manner;

the cable core wire is inserted into the groove at the right end of the third inner conductor and is elastically clamped and connected with the inner conductor;

the first inner conductor and the first outer conductor are connected through glass sintering;

the cable sheath is inserted into the through hole of the columnar part at the right end of the first outer conductor and is connected through electron beam welding to form a molten metal layer so as to ensure that the interior of the cable is hermetically sealed with the outside;

an air medium is filled between the third inner conductor and the first outer conductor.

2. The coaxial cable assembly of claim 1, wherein:

and a silica medium is filled between the core wire and the outer sheath.

3. The coaxial cable assembly of claim 1, wherein:

an air medium is filled between the second outer conductor and the second inner conductor.