High-temperature radio-frequency coaxial cable connector

Abstract

The utility model discloses a high-temperature radio frequency coaxial cable connector, which comprises an outer conductor and a first ceramic body, the first ceramic body is arranged in a tube cavity in the outer conductor in a penetrating manner, and the outer wall of the first ceramic body is fixedly connected with the inner wall of the outer conductor; the first inner conductor is at least partially inserted into the tube cavity of the first ceramic body from the first end surface of the first ceramic body in a penetrating manner, and the first end part of the first inner conductor extends out of the second end surface of the first ceramic body; and the second inner conductor is provided with a hollow tube cavity, and the third end part of the second inner conductor is sleeved on the first end part through the hollow tube cavity. According to the utility model, the inner conductor comprises the first inner conductor and the second inner conductor which can be sleeved, the first inner conductor fixedly penetrates through the ceramic body, and the second inner conductor penetrates through the part of the first inner conductor, which exceeds the ceramic body, so that the connector is convenient to connect and assemble with a cable.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a high-temperature radio frequency coaxial cable connector. Background Technology

[0002] Currently, the insulation material of existing high-temperature radio frequency coaxial cable connectors is usually PEI (polyetherimide), which has an operating temperature below 500℃ and poor high-temperature resistance. Furthermore, the connection between the inner conductor and the coaxial cable and its assembly within the connector is complex, resulting in an inflexible assembly structure. Utility Model Content

[0003] This invention provides a high-temperature radio frequency coaxial cable connector to solve the technical problems mentioned in the background section.

[0004] According to one aspect of the present invention, a high-temperature radio frequency coaxial cable connector is provided. The high-temperature radio frequency coaxial cable connector includes: an outer conductor, the outer conductor including a first end and a second end, the first end being connected to the outer conductor of a first coaxial cable, and the second end being connected to the outer conductor of a second coaxial cable; a first ceramic body, the first ceramic body being disposed within a cavity of the outer conductor, the outer wall of the first ceramic body being fixedly connected to the inner wall of the outer conductor; a first inner conductor, the first inner conductor being inserted into the cavity of the first ceramic body at least partially through a first end face of the first ceramic body, a first end of the first inner conductor extending from a second end face of the first ceramic body, and a second end of the first inner conductor being used to connect to the inner core of the first coaxial cable; a second inner conductor, the second inner conductor having a hollow cavity, a third end of the second inner conductor being sleeved on the first end through the hollow cavity, the end face of the third end abutting against the second end face, and a fourth end of the second inner conductor being used to connect to the inner core of the second coaxial cable.

[0005] Optionally, the first inner conductor includes a first shaft and a second shaft, wherein the second shaft is inserted through the first end face into the cavity of the first ceramic body, and the first end is located on the second shaft; the first shaft is located outside the first end face.

[0006] Optionally, the third end has a plurality of toothed structures, with an opening slot formed between the plurality of toothed structures.

[0007] Optionally, the tube wall at the fourth end has a through-hole.

[0008] Optionally, the diameter of the first shaft is larger than the diameter of the second shaft, and a step is formed between the first shaft and the second shaft, with the end face of the step abutting against the first end face of the first ceramic body.

[0009] Optionally, an annular slot is provided between the first shaft and the outer conductor.

[0010] Optionally, the high-temperature radio frequency coaxial cable connector further includes: a second ceramic body, the second ceramic body being disposed in a cavity within the outer conductor, the third end face of the second ceramic body being connected to the second end face, and the second ceramic body being located between the outer conductor and the second inner conductor.

[0011] Optionally, there is an annular gap between the outer peripheral wall of the second inner conductor and the inner peripheral wall of the second ceramic body.

[0012] Optionally, the first inner conductor, the first ceramic body, and the outer conductor are sintered together at high temperature.

[0013] Optionally, the high-temperature radio frequency coaxial cable connector further includes: a threaded sleeve, the inner wall of which has a first groove; the outer wall of which has a second groove; the outer conductor passing through a cavity in the threaded sleeve, the first groove and the second groove being axially aligned to form a limiting groove, a limiting ring being accommodated in the limiting groove, the limiting ring being a non-closed ring with an opening, and the limiting ring elastically unfolding within the limiting groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention uses a high-temperature resistant ceramic body as an insulating component between the outer and inner conductors, which can meet the high-temperature operating environment of 1200℃; it improves the high-temperature resistance of the high-temperature radio frequency coaxial cable connector; in addition, the inner conductor is configured as a first inner conductor and a second inner conductor that can be sleeved, the first inner conductor is fixedly inserted into the ceramic body, and the second inner conductor can be flexibly inserted from the outside into the part of the first inner conductor that extends beyond the ceramic body, which facilitates the connection and assembly between the connector and the coaxial cable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the high-temperature radio frequency coaxial cable connector provided by this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the high-temperature radio frequency coaxial cable connector provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the second inner conductor provided by this utility model.

[0019] The components in the attached diagram are labeled as follows:

[0020] 10. Outer conductor; 11. First end of outer conductor; 12. Second end of outer conductor; 13. Second groove; 14. Step limiting part;

[0021] 20. First ceramic body; 21. First end face; 22. Second end face;

[0022] 30. First inner conductor; 31. First end; 32. Second end; 33. First shaft; 34. Second shaft; 35. Step;

[0023] 40. Second inner conductor; 41. Hollow cavity; 42. Third end; 421. Tooth structure; 422. Slot; 43. Fourth end; 431. Through-hole;

[0024] 50. Second ceramic body; 51. Third end face;

[0025] 60. Screw sleeve; 61. First groove;

[0026] 70. Limiting ring. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] Please see Figure 1 and Figure 2 This utility model embodiment proposes a high-temperature radio frequency coaxial cable connector, which includes: an outer conductor 10, a first ceramic body 20, a first inner conductor 30, and a second inner conductor 40.

[0029] The outer conductor includes a first end 11 and a second end 12. The first end 11 is connected to the outer conductor of the first coaxial cable, and the second end 12 is connected to the outer conductor of the second coaxial cable. The outer conductor 10 can be a tubular structure with a hollow cavity. Optionally, the outer conductor 10 is made of 316L stainless steel.

[0030] The aforementioned first ceramic body 20 is inserted into the cavity within the outer conductor, and the outer wall of the first ceramic body 20 is fixedly connected to the inner wall of the outer conductor 10. Optionally, the outer wall of the first ceramic body 20 is sintered with the inner wall of the outer conductor 10 at high temperature. The first ceramic body 20 is made of a modified ceramic material resistant to temperatures above 1200℃, and the dielectric constant of the insulator is between 5.4 and 5.6. Specifically, it can be a high-frequency sintered ceramic body with a maximum operating temperature above 1200℃. As a high-temperature resistant insulating component placed between the outer and inner conductors, the first ceramic body 20 can meet the requirements of a high-temperature operating environment of 1200℃.

[0031] Available special ceramic materials and ceramic materials are shown in Table 1 below:

[0032]

[0033] Table 1

[0034] To simultaneously meet temperature and frequency requirements, the insulating material must not only be able to withstand environments of 1200℃ and above, but also have a dielectric constant of less than or equal to 5.4. Therefore, this application prefers modified ceramic materials that can withstand temperatures above 1200℃, with a dielectric constant of 5.4 to 5.6, enabling the connector to have a higher cutoff frequency and realize high-frequency signal transmission. This solves the problem that ordinary ceramic materials have a large dielectric constant and cannot work at higher operating frequencies.

[0035] The first inner conductor 30 is inserted into the cavity of the first ceramic body at least partially through the first end face 21 of the first ceramic body 20, and the first end 31 of the first inner conductor 30 extends from the second end face 22 of the first ceramic body 20. The second end 32 of the first inner conductor 30 is used to connect to the inner core of the first coaxial cable. Optionally, the material of the first inner conductor 30 is an iron-nickel alloy.

[0036] The second inner conductor 40 has a hollow cavity 41. The third end 42 of the second inner conductor 40 is sleeved on the first end 31 through the hollow cavity 41. The end face of the third end 42 abuts against the second end face 22. The fourth end 43 of the second inner conductor 40 is used to connect to the inner core of the second coaxial cable. The material of the second inner conductor 40 is a nickel-based alloy.

[0037] The above connectors are designed to meet the frequency requirements of 0-18GHz and can be connected to high-temperature silicon dioxide cables (such as the first coaxial cable and the second coaxial cable mentioned above) to achieve signal transmission.

[0038] The connector can be laser-welded to the coaxial cable. The second inner conductor 40 can be laser-welded to the inner core of the silicon dioxide second coaxial cable, and then the outer conductor 10 and the outer shell of the silicon dioxide second coaxial cable can be laser-welded.

[0039] The connection structure between the inner and outer conductors provided in this application has high strength and high overall connector reliability. The assembly process is also simpler, resulting in high overall connector reliability and superior performance. The high-temperature resistant connector provided in this application can be used in higher temperature environments (1200℃) and achieve higher frequency signal transmission. The connection method between the inner conductors described above can also be applied to the mating of J-end connectors and K-end connectors, that is, the inner conductors of the two connectors are mated together, which solves the problem of unreliable signal transmission caused by the failure of the socket-type inner conductor in high-temperature environments.

[0040] Optionally, the first inner conductor 30 includes a first shaft 33 and a second shaft 34, wherein the second shaft 34 is inserted through the first end face 21 into the cavity of the first ceramic body 20, and the first end face 31 is located on the second shaft 34; the first shaft 33 is located outside the first end face 21.

[0041] Optionally, the third end 42 has a plurality of tooth structures 421, with an opening slot 422 formed between the plurality of tooth structures.

[0042] Optionally, the tube wall at the fourth end 43 has a through-hole 431.

[0043] Optionally, the diameter of the first shaft 33 is larger than the diameter of the second shaft 34, and a step 35 is formed between the first shaft 33 and the second shaft 34, with the end face of the step 35 abutting against the first end face 21 of the first ceramic body 20.

[0044] Optionally, an annular slot is provided between the first shaft 33 and the outer conductor 10.

[0045] Optionally, the high-temperature radio frequency coaxial cable connector further includes: a second ceramic body 50, the second ceramic body 50 being disposed in a cavity within the outer conductor 10, the third end face 51 of the second ceramic body 50 being connected to the second end face 22, and the second ceramic body 50 being located between the outer conductor 10 and the second inner conductor 40, so as to provide insulation and isolation between the outer conductor 10 and the second inner conductor 40.

[0046] Optionally, the outer conductor 10 has a stepped limiting part 14 in its cavity. The stepped limiting part is aligned with the fourth end face of the second ceramic body so that the fourth end face of the second ceramic body 50 is limited at the stepped surface of the stepped limiting part 14. The second ceramic body 50 is located within the stepped surface of the stepped limiting part 14 and can limit the end face of the second coaxial cable.

[0047] Optionally, such as Figure 3 As shown, there is an annular gap between the outer peripheral wall of the second inner conductor 40 and the inner peripheral wall of the second ceramic body 50. This annular gap can be used partly as a slot or as an air isolation gap to improve signal transmission stability.

[0048] Optionally, the first inner conductor 30, the first ceramic body 20, and the outer conductor 10 are sintered together at high temperature.

[0049] Optionally, the high-temperature radio frequency coaxial cable connector further includes: a threaded sleeve 60, the inner wall of which has a first groove 61; the outer wall of the outer conductor 10 has a second groove 13; the outer conductor 10 passes through a cavity in the threaded sleeve 60, the first groove 61 and the second groove 62 are axially aligned to form a limiting groove, a limiting ring 70 is accommodated in the limiting groove, the limiting ring 70 is a non-closed ring with an opening, and the limiting ring elastically unfolds in the limiting groove.

[0050] For high-temperature radio frequency coaxial cable connectors, copper alloy is commonly used as the inner conductor material. However, since the connector operating temperature reaches 1200℃, copper alloy can no longer meet the requirements, so a new inner conductor material needs to be selected. To meet the temperature requirements, the threaded sleeve 60 and the limiting ring 70 of the high-temperature radio frequency coaxial cable connector in this application can be made of 316L stainless steel, the first inner conductor 30 can be made of iron-nickel alloy, the second inner conductor 40 can be made of nickel-based alloy, the outer conductor 10 can be made of 316L stainless steel, and the first ceramic body 20 and the second ceramic body 50 of the insulator can be made of high-temperature ceramic material. 316L stainless steel has excellent resistance to high-temperature oxidation and is suitable for manufacturing various furnace components. The maximum operating temperature is 1200℃, and the continuous operating temperature is 1150℃, which can meet the temperature requirements. However, since 316L stainless steel has no elasticity, the second inner conductor 40 is made of nickel-based alloy and designed as a hollow tube. It adopts a flexible connection with the first inner conductor 30 to ensure reliable connection and realize high-frequency signal transmission. Since the high-temperature connector provided in this application uses high-temperature resistant materials for both the inner and outer conductors and the insulation, there is no need to add a high-temperature resistant plate to the outside of the connector. The structure is simple and solves the problem of difficult installation in a small area.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A high-temperature radio frequency coaxial cable connector, characterized in that, The high-temperature radio frequency coaxial cable connector includes: An outer conductor, comprising a first end and a second end, wherein the first end is connected to the outer conductor of a first coaxial cable and the second end is connected to the outer conductor of a second coaxial cable; A first ceramic body is inserted into a cavity within the outer conductor, and the outer wall of the first ceramic body is fixedly connected to the inner wall of the outer conductor. A first inner conductor, which is inserted into the cavity of the first ceramic body at least partially through a first end face of the first ceramic body, and a first end of the first inner conductor protruding from a second end face of the first ceramic body, wherein the second end of the first inner conductor is used to connect to the inner core of the first coaxial cable; The second inner conductor has a hollow cavity. The third end of the second inner conductor is sleeved on the first end through the hollow cavity. The end face of the third end abuts against the second end face. The fourth end of the second inner conductor is used to connect to the inner core of the second coaxial cable.

2. The high-temperature radio frequency coaxial cable connector according to claim 1, characterized in that, The first inner conductor includes a first shaft and a second shaft, wherein the second shaft is inserted into the cavity of the first ceramic body through the first end face, and the first end is located on the second shaft; the first shaft is located outside the first end face.

3. The high-temperature radio frequency coaxial cable connector according to claim 2, characterized in that, The third end has multiple tooth structures, and the multiple tooth structures form an opening slot.

4. The high-temperature radio frequency coaxial cable connector according to claim 2, characterized in that, The tube wall at the fourth end has a through-hole.

5. The high-temperature radio frequency coaxial cable connector according to claim 2, characterized in that, The diameter of the first shaft is larger than the diameter of the second shaft, and a step is formed between the first shaft and the second shaft, with the end face of the step abutting against the first end face of the first ceramic body.

6. The high-temperature radio frequency coaxial cable connector according to claim 2, characterized in that, The first shaft has an annular slot between it and the outer conductor.

7. The high-temperature radio frequency coaxial cable connector according to claim 1, characterized in that, The high-temperature radio frequency coaxial cable connector also includes: The second ceramic body is inserted into the cavity within the outer conductor, the third end face of the second ceramic body is connected to the second end face, and the second ceramic body is located between the outer conductor and the second inner conductor.

8. The high-temperature radio frequency coaxial cable connector according to claim 7, characterized in that, There is an annular gap between the outer peripheral wall of the second inner conductor and the inner peripheral wall of the second ceramic body.

9. The high-temperature radio frequency coaxial cable connector according to claim 1, characterized in that, The first inner conductor, the first ceramic body, and the outer conductor are connected by high-temperature sintering.

10. The high-temperature radio frequency coaxial cable connector according to any one of claims 1 to 9, characterized in that, The high-temperature radio frequency coaxial cable connector also includes: A threaded sleeve, wherein the inner wall of the threaded sleeve has a first groove; The outer wall of the outer conductor has a second groove; The outer conductor passes through the cavity inside the threaded sleeve. The first groove and the second groove are axially aligned to form a limiting groove. A limiting ring is accommodated in the limiting groove. The limiting ring is a non-closed ring with an opening. The limiting ring elastically unfolds within the limiting groove.

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