Vacuum optical fiber connecting piece for aging ignition detection of power coupler

Abstract

The utility model relates to the field of vacuum optical fiber connecting pieces, in particular to a vacuum optical fiber connecting piece for aging ignition detection of a power coupler, which comprises a vacuum flange, a vacuum end connecting piece, an atmosphere end connecting piece and a sealing part, and is characterized in that a cylindrical cavity, a first axial through hole and a second axial through hole are arranged in the vacuum flange; the inner diameter of the first axial through hole and the inner diameter of the second axial through hole are both smaller than that of the cylindrical cavity, a sealing part is arranged in the cylindrical cavity, the axial width of the sealing part is larger than that of the cylindrical cavity, the first axial through hole is further in threaded connection with a vacuum end connecting piece, and the second axial through hole is further in threaded connection with an atmosphere end connecting piece. The stability and the sealing performance of optical fiber connection are realized, and the convenience of disassembly and installation in use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum optical fiber connectors, in particular to a vacuum optical fiber connector for power coupler aging and spark detection. Background Art

[0002] At present, radio frequency superconducting technology is the cutting-edge technology in the development of particle accelerators, and superconducting cavities have been widely used in various large accelerators. Superconducting cavities are mainly composed of three parts: cavity, high-power input coupler and high-order mode suppressor. Among them, the high-power input coupler undertakes multiple functions such as power feeding, vacuum isolation, temperature transition, etc., and is a research hotspot in the field of radio frequency superconductivity of accelerators.

[0003] Before the power coupler is actually installed on the accelerator for operation, it needs to undergo a burn-in test. During the burn-in test of the power coupler, the "sparking" problem caused by unreasonable structural design and defects in the process of manufacturing has always been the main factor affecting the burn-in effect of the power coupler. Generally, the changes in the vacuum degree in the coupler's vacuum chamber are monitored and analyzed, but this analysis has the risk of misjudgment, so a new method of using optical signals to detect "sparking" is used. However, how to smoothly and losslessly transmit the optical signal generated by the sparking from the power coupler vacuum chamber to the atmosphere is a difficult problem.

[0004] At present, optical signal transmission can be achieved by using fiber optic connectors based on vacuum flanges. However, the supporting parts of existing vacuum fiber optic connectors are mostly plastic parts, which are easily broken down when transmitting high-power laser signals. A vacuum fiber optic connector with a sapphire window as a supporting part has also been developed. However, this vacuum fiber optic connector welds the sapphire supporting part and the connector of the optical fiber together. It is complicated to disassemble when parts need to be replaced, and is not flexible enough in actual use. Utility Model Content

[0005] The utility model provides a vacuum optical fiber connector for power coupler aging and spark detection.

[0006] The technical solution of this utility model is as follows:

[0007] A vacuum optical fiber connector for power coupler aging ignition detection, comprising a vacuum flange, a vacuum end connector, an atmosphere end connector and a sealing portion, characterized in that a cylindrical cavity, a first axial through hole and a second axial through hole coaxially arranged on both sides of the cylindrical cavity are arranged in the vacuum flange, and the inner diameters of the first axial through hole and the second axial through hole are both smaller than the cylindrical cavity.

[0008] The first axial through hole is also threadedly connected to the vacuum end connection piece, and the second axial through hole is also threadedly connected to the atmosphere end connection piece.

[0009] The sealing part comprises a cylindrical support structure and a sapphire window piece arranged in the cylindrical support structure. One end of the cylindrical support structure abuts against the cylindrical cavity, and the other end is located in the first axial through hole.

[0010] Specifically, the vacuum end connector includes a first annular boss and a first connector coaxially connected to the first annular boss, and the first annular boss and the first connector are integrally formed.

[0011] Furthermore, the first annular boss is threadedly connected to the first axial through hole.

[0012] Specifically, the atmospheric end connecting piece includes a second annular boss and a second connecting head coaxially connected to the second annular boss, and the second annular boss and the second connecting head are integrally formed.

[0013] Furthermore, the second annular boss is threadedly connected to the second axial through hole.

[0014] Specifically, a third annular boss is disposed around the middle portion of the outer circumference of the second annular boss.

[0015] Furthermore, the outer diameter of the cylindrical support structure matches the inner diameter of the first axial through hole.

[0016] Specifically, the sapphire window piece is a double-plane circular structure, which is coaxially arranged with the cylindrical support structure, and its outer diameter size matches the inner diameter size of the cylindrical support structure.

[0017] Preferably, one or more cylindrical cavities are provided.

[0018] Preferably, the first connector model is a SMA905 connector.

[0019] The beneficial effects of the utility model are:

[0020] (1) The utility model is a vacuum optical fiber connector for power coupler aging ignition detection, wherein the vacuum end connector is connected to the first axial through hole of the vacuum flange, the atmosphere end connector is threadedly connected to the second axial through hole of the vacuum flange, and the vacuum end connector and the atmosphere end connector are connected in a detachable mechanical manner, which not only ensures the stability and sealing of the optical fiber connection, but also improves the convenience of disassembly and installation during use;

[0021] (2) The sapphire window piece is welded to the supporting structure as a sealing part, and the sealing performance of the entire optical fiber connector is good, ensuring the stable transmission of the optical signal generated by the power coupler spark detection in a vacuum environment;

[0022] (3) The vacuum optical fiber connector provided by the utility model can be processed with one or more cylindrical cavities on the vacuum flange according to actual needs, so that one or more channels of optical fiber signals can be transmitted simultaneously at one time, thereby making the aging efficiency of the power coupler higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 It is a schematic cross-sectional structure diagram of a vacuum optical fiber connector for power coupler aging ignition detection in an embodiment;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the vacuum flange in the embodiment;

[0026] Figure 3 This is an enlarged view of the structure of part A;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Vacuum flange; 2. Vacuum end connector; 3. Atmospheric end connector; 4. Sealing portion; 5. Cylindrical cavity; 6. First axial through hole; 7. Second axial through hole; 21. First annular boss; 22. First connector; 31. Second annular boss; 32. Second connector; 33. Third annular boss; 41. Sapphire window; 42. Support structure. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0030] Example

[0031] This embodiment provides a vacuum optical fiber connector for power coupler aging spark detection, see Figure 1 , comprising a vacuum flange 1, a vacuum end connector 2, an atmosphere end connector 3 and a sealing portion 4, characterized in that a cylindrical cavity 5, a first axial through hole 6 and a second axial through hole 7 are coaxially arranged on both sides of the cylindrical cavity 5, and the inner diameters of the first axial through hole 6 and the second axial through hole 7 are both smaller than the cylindrical cavity 5,

[0032] A sealing portion 4 is disposed in the cylindrical cavity 5. The axial width of the sealing portion 4 is greater than the axial width of the cylindrical cavity 5. The sealing portion 4 includes a cylindrical support structure 42 and a sapphire window sheet 41 disposed in the cylindrical support structure 42.

[0033] The first axial through hole 6 is also threadedly connected to the vacuum end connecting piece 2 , and the second axial through hole 7 is also threadedly connected to the atmosphere end connecting piece 3 .

[0034] Specifically, see Figure 1 and Figure 2In the present utility model, the model of the vacuum flange 1 can be selected as CF16, CF25 and CF35 flanges, which have good versatility. The vacuum flange 1 is provided with a cylindrical cavity 5, and a first axial through hole 6 and a second axial through hole 7 coaxially arranged on both sides of the cylindrical cavity 5, respectively. The inner diameters of the first axial through hole 6 and the second axial through hole 7 are both smaller than the cylindrical cavity 5. This structural design helps to maintain the stability of the vacuum environment and prevent gas or impurities from entering from the connection. At the same time, the coaxial structural setting makes it easier to align and fix the optical fiber during connection and installation, saving operation time.

[0035] The sealing part 4 is arranged in the cylindrical cavity 5, and the axial width of the sealing part 4 is greater than the axial width of the cylindrical cavity 5. The sealing part 4 includes a cylindrical support structure 42 and a sapphire window piece 41 arranged in the cylindrical support structure 42. The gap formed by the cylindrical support structure 42 and the inner wall of the cylindrical cavity 5 is used to accommodate welding materials, so that the cylindrical support structure 42 is fixedly welded; the axial width of the cylindrical support structure 42 is greater than the axial width of the cylindrical cavity 5, and the outer diameter of the cylindrical support structure 42 matches the inner diameter of the first axial through hole 6. This structural design can make the entire sealing part 4 firmly supported inside the vacuum flange 1, prevent the sealing part 4 from shaking or displacement in the cylindrical cavity 5, and maintain the stability of the entire optical fiber connector.

[0036] The sapphire window 41 is a double-plane circular structure, which is coaxially arranged with the cylindrical support structure 42, and its outer diameter matches the inner diameter of the cylindrical support structure 42. Among them, the sapphire window 41 is responsible for vacuum sealing and light transmission. The sapphire window 41 can choose any crystal phase direction, and the transmittance in the working band of the fiber laser must be guaranteed to be not less than 80%. The support structure 42 is a Kovar alloy outer cylinder, and the material is 4J29 or 4J33. In this embodiment, the sapphire window 41 and the cylindrical support structure 42 are connected together by laser welding.

[0037] In the utility model, the first axial through hole 6 is also threadedly connected to the vacuum end connector 2, and the second axial through hole 7 is also threadedly connected to the atmosphere end connector 3. The vacuum end connector 2 includes a first annular boss 21 and a first connector 22 coaxially connected to the first annular boss 21, and the first annular boss 21 and the first connector 22 are integrally formed, wherein the first annular boss 21 is threadedly connected to the first axial through hole 6, and the first connector 22 is a SMA905 connector with high interface compatibility. The vacuum end connector 2 is responsible for fixing the optical fiber connected to the vacuum side, and the material can be selected from 6063, 6061 aluminum alloy or 304, 316, 316L stainless steel. The vacuum end connector 2 is mechanically connected to the vacuum flange 1 through M6, M8 or M10 threads, and the vacuum end connector 2 is detachable, which is more flexible and convenient to use.

[0038] The atmospheric end connector 3 includes a second annular boss 31 and a second connector 32 coaxially connected to the second annular boss 31. The second annular boss 31 and the second connector 32 are integrally formed. The second annular boss 31 is threadedly connected to the second axial through hole 7. The second connector 32 is a SMA905 connector. A third annular boss 33 is arranged around the middle of the outer circumference of the second annular boss 31. The third annular boss 33 increases the contact area between the atmospheric end connector 3 and the vacuum flange 1, further enhancing the sealing of the connection.

[0039] One or more cylindrical cavities 5 are provided, which can transmit multiple channel signals simultaneously, and the ignition efficiency is higher.

Claims

1. A vacuum optical fiber connector for power coupler aging spark detection, comprising a vacuum flange (1), a vacuum end connector (2), an atmospheric end connector (3) and a sealing portion (4), characterized in that: The vacuum flange (1) is provided with a cylindrical cavity (5), a first axial through hole (6) and a second axial through hole (7) coaxially arranged on both sides of the cylindrical cavity (5), wherein the inner diameters of the first axial through hole (6) and the second axial through hole (7) are both smaller than those of the cylindrical cavity (5). The first axial through hole (6) is also threadedly connected to the vacuum end connection piece (2), and the second axial through hole (7) is also threadedly connected to the atmosphere end connection piece (3). The sealing portion (4) comprises a cylindrical support structure (42) and a sapphire window piece (41) arranged in the cylindrical support structure (42); one end of the cylindrical support structure (42) abuts against the columnar cavity (5), and the other end is located in the first axial through hole (6).

2. A vacuum optical fiber connector for power coupler aging spark detection according to claim 1, characterized in that: The vacuum end connecting piece (2) comprises a first annular boss (21) and a first connecting head (22) coaxially connected to the first annular boss (21); the first annular boss (21) and the first connecting head (22) are integrally formed.

3. A vacuum optical fiber connector for power coupler aging spark detection according to claim 2, characterized in that: The first annular boss (21) is threadedly connected to the first axial through hole (6).

4. A vacuum optical fiber connector for power coupler aging spark detection according to claim 1, characterized in that: The atmospheric end connecting piece (3) comprises a second annular boss (31) and a second connecting head (32) coaxially connected to the second annular boss (31); the second annular boss (31) and the second connecting head (32) are integrally formed.

5. A vacuum optical fiber connector for power coupler aging spark detection according to claim 4, characterized in that: The second annular boss (31) is threadedly connected to the second axial through hole (7).

6. A vacuum optical fiber connector for power coupler aging spark detection according to claim 5, characterized in that: A third annular boss (33) is arranged around the middle of the outer circumference of the second annular boss (31).

7. A vacuum optical fiber connector for power coupler aging spark detection according to claim 1, characterized in that: The outer diameter of the cylindrical support structure (42) matches the inner diameter of the first axial through hole (6).

8. A vacuum optical fiber connector for power coupler aging spark detection according to claim 1, characterized in that: The sapphire window piece (41) is a double-plane circular structure, is coaxially arranged with the cylindrical support structure (42), and its outer diameter size matches the inner diameter size of the cylindrical support structure (42).

9. A vacuum optical fiber connector for power coupler aging spark detection according to claim 1, characterized in that: One or more first axial through holes (6) are provided.

10. A vacuum optical fiber connector for power coupler aging spark detection according to claim 2, characterized in that: The first connector (22) is a SMA905 connector.

Images