CN114221294A - Coaxial vacuum wall penetrating piece of high pressure radio frequency - Google Patents

Coaxial vacuum wall penetrating piece of high pressure radio frequency Download PDF

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Publication number
CN114221294A
CN114221294A CN202111649474.5A CN202111649474A CN114221294A CN 114221294 A CN114221294 A CN 114221294A CN 202111649474 A CN202111649474 A CN 202111649474A CN 114221294 A CN114221294 A CN 114221294A
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CN
China
Prior art keywords
inner conductor
piece
welding
ceramic
outer shell
Prior art date
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Pending
Application number
CN202111649474.5A
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Chinese (zh)
Inventor
霍丽华
施华
陈锦晖
王磊
王冠文
吴官健
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Institute of High Energy Physics of CAS
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Institute of High Energy Physics of CAS
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Publication date
Application filed by Institute of High Energy Physics of CAS filed Critical Institute of High Energy Physics of CAS
Priority to CN202111649474.5A priority Critical patent/CN114221294A/en
Publication of CN114221294A publication Critical patent/CN114221294A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The invention discloses a high-voltage radio frequency coaxial vacuum wall penetrating piece which is characterized by comprising a welding assembly, an inner conductor switching part, an insulating piece, an outer shell and a threaded ring, wherein the welding assembly is arranged on the inner conductor; the welding assembly comprises a flange, a welding part inner conductor and a ceramic part; the center of the ceramic piece is provided with a through hole matched with the inner conductor of the welding piece, and the lower end of the inner conductor of the welding piece is inserted into the through hole to be sealed and fixed with the ceramic piece; the ceramic piece is fixedly connected with the flange in a sealing way; the flange is contacted with the upper end of the outer shell, the inner conductor and the inner conductor adapter piece are positioned in the centers of the insulating piece and the outer shell, the upper end of the inner conductor is connected with the lower end of the inner conductor of the welding piece, and the lower end of the inner conductor is connected with the inner conductor adapter piece; an insulating part is arranged among the inner conductor, the inner conductor switching part and the outer shell; the threaded ring is connected with the lower end of the outer shell and compresses the insulating part. The wall penetrating piece can meet the requirements of high vacuum, high pressure resistance and low loss in pulse power matching transmission, and is suitable for radiation environment.

Description

Coaxial vacuum wall penetrating piece of high pressure radio frequency
Technical Field
The invention belongs to the field of electric vacuum, and relates to a high-voltage radio-frequency coaxial vacuum wall penetrating piece which is used for power transmission inside and outside vacuum on high-voltage equipment.
Background
At present, the wall penetrating piece used on high-voltage equipment has the functions of vacuum high-voltage wall penetrating only, and the wall penetrating piece which integrates the characteristics of high vacuum, high voltage resistance, wide frequency band, low pulse power loss and radiation resistance into a whole is not found in the field at home.
The most similar to the invention is a ceramic-metal sealed high-pressure vacuum wall penetrating member disclosed in patent document with publication number CN201174556Y, which mainly has the function of resisting high pressure and realizing vacuum wall penetrating. But it can't solve the pulse power loss and the wall penetrating spare work scheduling problem in the radiation environment of wall penetrating in-process.
Disclosure of Invention
The invention aims to provide a high-voltage radio-frequency coaxial vacuum wall penetrating piece which meets the requirements of high vacuum, high voltage resistance and low loss in pulse power matching transmission and is suitable for a radiation environment.
The technical scheme of the invention is as follows:
a high-voltage radio frequency coaxial vacuum wall penetrating piece is characterized by comprising a welding assembly 1, an inner conductor 2, an inner conductor adapter part 3, an insulating piece 4, an outer shell 5 and a threaded ring 6; wherein
The welding assembly 1 comprises a flange 11, a welding piece inner conductor 12 and a ceramic piece 13; a through hole matched with the inner conductor 12 of the welding part is formed in the center of the ceramic part 13, and the lower end of the inner conductor 12 of the welding part is inserted into the through hole and is sealed and fixed with the ceramic part 13; the ceramic piece 13 is fixedly connected with the flange 11 in a sealing way;
the flange 11 of the welding assembly 1 is in contact with the upper end of the outer shell 5, the inner conductor 2 and the inner conductor adapter 3 are positioned in the centers of the insulating part 4 and the outer shell 5, the upper end of the inner conductor 2 is connected with the lower end of the inner conductor 12 of the welding part, the lower end of the inner conductor 2 is connected with the inner conductor adapter 3, and the inner conductor 12 of the welding part, the inner conductor 2 and the inner conductor adapter 3 are combined to form an inner conductor of a wall penetrating part;
the insulating part 4 is assembled among the inner conductor 2, the inner conductor adapter part 3 and the outer shell 5; the threaded ring 6 is connected with the lower end of the outer shell 5 and compresses the insulating part 4; the flange 11, the outer shell 5 and the threaded ring 6 are combined to form an outer conductor of the wall penetrating piece.
Further, the ceramic piece 13 is a flat-bottomed V-shaped structure, and a through hole matched with the inner conductor 12 of the welding piece is formed in the center of the bottom of the ceramic piece.
Furthermore, one end of the insulating part 4 is in a horn mouth structure matched with the ceramic part 13, and the other end of the insulating part is in a groove structure designed to be beneficial to increasing creepage distance.
Further, a threaded hole is formed in the upper end of the conductor 12 in the welding part and used for being connected with high-voltage equipment; the lower end of the inner conductor 12 of the welding part is provided with a threaded hole for connecting with the inner conductor 2.
Furthermore, the upper end of the inner conductor adaptor 3 is connected with the inner conductor 2 through threads, and the lower end of the inner conductor adaptor 3 is of an elastic plugging structure and is used for being connected with a cable.
Further, the ceramic member 3 is 99% alumina ceramic.
Further, the insulating member 4 is made of Polyetheretherketone (PEEK).
Furthermore, the mechanical dimensions of the structural components are designed according to the characteristic impedance of a 50 omega coaxial structure by referring to the relative dielectric constants of the alumina ceramic and the polyetheretherketone.
Compared with the prior art, the invention has the following positive effects:
tests show that the static vacuum degree of the vacuum inner part of the wall penetrating piece is better than 4 multiplied by 10 when the wall penetrating piece works-8Pa, the vacuum leakage rate of the welded assembly is better than 3 multiplied by 10-12Pa·m3And s. The special shape structure of the ceramic part and the insulating part in the wall penetrating part enables the inner conductor and the outer conductor to bear 8kV direct current high voltage under the air condition, and fast pulses with the bottom width less than 20ns, the pulse edge less than 1ns and the peak value high voltage of 20kV can be transmitted under the vacuum condition. Wearing deviceThe overall structural form and mechanical size of the wall part and the structural matching among all parts can realize the transmission with low pulse power loss, the standing-wave ratio below 1GHz is less than 1.5, and the insertion loss S21Less than 0.4 dB; standing-wave ratio below 3GHz less than 1.8, insertion loss S21Less than 0.8 dB. The wall penetrating piece adopts a polyether ether ketone (PEEK) material as an insulating medium material, and has the characteristics of low dielectric constant and good high-temperature and radiation resistance. The structural characteristic impedance of the coaxial wall penetrating piece is designed according to 50 omega and can be matched with a conventional 50 omega high-voltage radio frequency coaxial cable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein, 1-welding the assembly, 2-the inner conductor; 3-inner conductor adapter part; 4-an insulator; 5-an outer shell; 6-thread ring.
Fig. 2 is a schematic view of a welded assembly.
Wherein, 11-flange, 12-welding inner conductor; 13-ceramic piece.
Detailed Description
The invention relates to a high-voltage radio-frequency vacuum coaxial wall penetrating piece which comprises a welding assembly 1, an inner conductor 2, an inner conductor switching part 3, an insulating piece 4, an outer shell 5 and a threaded ring 6. Wherein the welding assembly 1 comprises a flange 11, a welding member inner conductor 12 and a ceramic member 13.
The invention is described in further detail below with reference to the figures and the embodiments.
Example 1, see figure 1. A high-voltage radio frequency coaxial vacuum wall penetrating member comprises an inner conductor 12, an inner conductor 2 and an inner conductor adapter part 3 which form the inner conductor of the wall penetrating member together, a flange 11, an outer shell 5 and a thread ring 6 which form the outer conductor of the wall penetrating member together, a ceramic member 13 and an insulating member 4 are assembled between the outer conductor of the wall penetrating member and the inner conductor of the wall penetrating member to isolate the inner conductor of the wall penetrating member from the outer conductor of the wall penetrating member, so that a circuit between the inner conductor and the outer conductor is disconnected. Referring to fig. 2, the ceramic piece 13 is integrally designed into a flat-bottomed V-shaped structure, a circular through hole matched with the inner conductor 12 of the welding piece is formed in the center of the bottom of the ceramic piece, the inner conductor 12 of the welding piece is inserted into the through hole and is welded and fixed with the ceramic piece 13 at the bottom, and the sizes of the inner conductor 12 of the welding piece and the upper end of the through hole of the ceramic piece 13 are matched by tolerance to ensure smooth installation; the ceramic piece 13 and the flange 11 are welded and fixed, so that the welding assembly 1 is formed by the inner conductor 12 of the welding piece, the ceramic piece 13 and the flange 11, and vacuum sealing is realized. Referring to fig. 1, on the basis of a welded assembly 1, an inner conductor 2, an inner conductor adaptor 3, an insulator 4 and an outer shell 5 are assembled in sequence, the outer shell 5 and the welded assembly 1 are fixed by screws, and finally a threaded ring 6 is assembled to compress the insulator 4. The top end of the conductor 12 in the welding part is provided with a threaded hole, so that the welding part can be conveniently connected with high-voltage equipment; the lower end of the inner conductor 12 of the welding part is provided with a threaded hole which is connected with the inner conductor 2; inner conductor adaptor 3, one end passes through threaded connection with inner conductor 2, and the other end designs into elasticity plug structure, convenient and cable junction. One end of the insulating part 4 is matched with the flat-bottom V-shaped structure of the ceramic part 13, and the other end of the insulating part is designed with a groove structure, so that the creepage distance is increased, and the high-voltage resistance effect is achieved. And the threaded ring 6 is connected with the outer shell 5 through external threads to fix the insulating part 4. When in use, one end of the flange is connected with a corresponding flange of high-pressure equipment and is communicated with the vacuum environment of the high-pressure equipment; and one end of the shell is connected with the cable connecting piece to realize electric communication.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present 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 (7)

1. A high-voltage radio-frequency coaxial vacuum wall penetrating piece is characterized by comprising a welding assembly (1), an inner conductor (2), an inner conductor switching part (3), an insulating piece (4), an outer shell (5) and a threaded ring (6); wherein
The welding assembly (1) comprises a flange (11), a welding piece inner conductor (12) and a ceramic piece (13); a through hole matched with the welding part inner conductor (12) is formed in the center of the ceramic part (13), and the lower end of the welding part inner conductor (12) is inserted into the through hole and is hermetically fixed with the ceramic part (13); the ceramic piece (13) is fixedly connected with the flange (11) in a sealing way;
the flange of the welding assembly (1) is in contact with the upper end of the outer shell (5), the inner conductor (2) and the inner conductor adapter piece (3) are positioned in the centers of the insulating piece (4) and the outer shell (5), the upper end of the inner conductor (2) is connected with the lower end of the inner conductor (12) of the welding piece, the lower end of the inner conductor (2) is connected with the inner conductor adapter piece (3), and the inner conductor (12) of the welding piece, the inner conductor (2) and the inner conductor adapter piece (3) form an inner conductor of a wall-penetrating piece;
the insulation piece (4) is filled among the inner conductor (2), the inner conductor adapter part (3) and the outer shell (5); the threaded ring (6) is connected with the lower end of the outer shell (5) and compresses the insulating part (4); the flange (11), the outer shell (5) and the threaded ring (6) form an outer conductor of the wall penetrating piece.
2. The high-voltage radio-frequency coaxial vacuum through-wall part according to claim 1, characterized in that the ceramic part (13) is a flat-bottomed V-shaped structure, and a through hole matched with the inner conductor (12) of the welding part is formed in the center of the bottom of the ceramic part.
3. The high-voltage radio-frequency coaxial vacuum wall penetrating element as claimed in claim 1, wherein one end of the insulating element (4) is of a bell mouth structure matched with the ceramic element (13), and the other end of the insulating element is of a groove structure beneficial to increasing creepage distance.
4. The high-voltage radio-frequency coaxial vacuum wall penetrating member as claimed in claim 1, wherein a threaded hole is formed in the upper end of the inner conductor (12) of the welding member for connecting with high-voltage equipment; the lower end of the inner conductor (12) of the welding part is provided with a threaded hole for connecting with the inner conductor (2).
5. The high-voltage radio-frequency coaxial vacuum wall penetrating member as claimed in claim 1, wherein the upper end of the inner conductor adaptor (3) is in threaded connection with the inner conductor (2), and the lower end of the inner conductor adaptor (3) is of an elastic plugging structure and is used for being connected with a cable.
6. The high-pressure coaxial radio-frequency vacuum through-wall part according to any one of claims 1 to 5, characterized in that the ceramic part (3) is a 99% alumina ceramic.
7. The high-voltage radio-frequency coaxial vacuum wall penetrating part according to any one of claims 1 to 5, wherein the material of the insulating part (4) is PEEK.
CN202111649474.5A 2021-12-30 2021-12-30 Coaxial vacuum wall penetrating piece of high pressure radio frequency Pending CN114221294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111649474.5A CN114221294A (en) 2021-12-30 2021-12-30 Coaxial vacuum wall penetrating piece of high pressure radio frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111649474.5A CN114221294A (en) 2021-12-30 2021-12-30 Coaxial vacuum wall penetrating piece of high pressure radio frequency

Publications (1)

Publication Number Publication Date
CN114221294A true CN114221294A (en) 2022-03-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111649474.5A Pending CN114221294A (en) 2021-12-30 2021-12-30 Coaxial vacuum wall penetrating piece of high pressure radio frequency

Country Status (1)

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CN (1) CN114221294A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114890807A (en) * 2022-06-01 2022-08-12 中国科学院高能物理研究所 Aluminum oxide ceramic and metal seal welding piece with coaxial structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114890807A (en) * 2022-06-01 2022-08-12 中国科学院高能物理研究所 Aluminum oxide ceramic and metal seal welding piece with coaxial structure

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