A high-voltage radio frequency coaxial connector

Abstract

The present invention relates to a high-voltage radio frequency coaxial connector, comprising a socket connector and an adapter. The plug connector comprises a housing, an inner conductor, a tail fitting, a first O-ring, a bulkhead, a clamping ring, and a flange, while the adapter comprises a housing, a second O-ring, and a pin. During installation, the cable insulation layer is spirally tapered and grooved, with the total length of the grooves being no less than the creepage distance of the operating voltage. The two socket connectors are connected by the adapter, and the cavity is filled with insulating oil to completely expel the air within the connector cavity, achieving a withstand voltage of 600 kV.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable transmission, and in particular relates to a high-voltage radio frequency coaxial connector. Background Art

[0002] High-voltage RF coaxial connectors feature RF transmission and high voltage resistance. They are used to connect cables to equipment and must meet both connectivity and electrical requirements. Electrical requirements include voltage resistance, impedance, and other electrical properties. High-voltage connector voltage resistance is a major constraint on its development. In high-voltage applications, air and impurities in the connector can cause voltage breakdown and failure.

[0003] Currently, most high-voltage connectors use an interleaved insulation structure, which creates gaps when mated and prevents the complete removal of air. Typical high-voltage electrical connectors, such as the high-voltage electrical connector and plug and socket described in Application No. 200910064173.9 from AVIC Optoelectronics Technology Co., Ltd., are bulky and difficult to manufacture if they are to meet 600kV voltage requirements. Furthermore, these plug connectors can only be used with receptacles, making on-site conversion difficult. For example, the high-voltage coaxial cable connector described in Application No. 201210504846.X is designed only for power transmission and cannot guarantee coaxial impedance consistency. Summary of the Invention

[0004] The problem to be solved by the present invention is to overcome the problems existing in the prior art and provide a high-voltage radio frequency coaxial connector to solve the problem that the prior art has no coaxial connection technology that can simultaneously achieve 50 ohm impedance and 600kV high voltage, and cannot meet the usage requirements in the field of high-energy physics research.

[0005] In order to solve the above technical problems, the technical solution of the present invention is achieved as follows:

[0006] A high-voltage radio frequency coaxial connector, including a socket connector and an adapter, characterized in that: the socket connector includes a shell 8, an inner conductor 9, a tail accessory 1, a rear compression screw sleeve 2, a claw 3, a front compression screw sleeve 4, a first O-ring 5, a bulkhead 6, a flange 10, and a pin 11; the adapter includes an outer conductor 12, a second O-ring 13, and a pin 14; the socket connector shell 8 is connected to the tail accessory 1 by threads, the claw 3 is fixed to the outer conductor 12 by the rear compression screw sleeve 2 and the front compression screw sleeve 4, the first O-ring 5 is installed on the shell 8, the flange 10 is movably connected to the shell 8, the bulkhead 6 is movably installed on the shell 8, and the second O-ring 13 of the adapter is installed on the outer conductor 12.

[0007] Furthermore, there are more than one high-voltage RF coaxial connectors, and the socket connectors are installed through adapter guidance and fixedly connected through flange 10. The flange 10 is guided by pin 11 when docked and fixed. The inner conductor 9 is arranged on the axis of the outer shell 8, and the pin 14 is arranged on the axis of the outer conductor 12 and a slot is set on the head.

[0008] Furthermore, the socket connectors are connected to each other through an adapter to form a sealed cavity, which is filled with insulating oil.

[0009] Furthermore, two or more outer sealing ring grooves 81 and one or more oil filling holes 15 are provided on the tail of the outer shell 8, two or more sealing ring grooves 121 are provided on the outer side of the outer conductor 12 of the adapter, and a spiral taper groove 71 is provided on the cable insulation 7.

[0010] Furthermore, the insulating oil is benzyltoluene, the taper of the spiral taper slot 71 is 3° to 10°, and the thickness of the spiral blade is 5 to 30 mm.

[0011] Furthermore, the flange 10 is movably connected to the housing 8 via a clamping ring, and the bulkhead 6 is fixedly mounted on the housing 8 via threads.

[0012] Furthermore, an arc step 82 is provided at the location where the inner diameter of the housing 8 changes, and the arc radius of the arc step 82 is not less than 4 mm.

[0013] Furthermore, the outer shell 8 is made of brass or stainless steel, the inner conductor 9 is made of tin bronze or beryllium bronze, the outer conductor 12 is made of brass, and the first O-ring 5 is made of chloroprene rubber.

[0014] The present invention can bring the following beneficial effects:

[0015] The socket connector of the present invention can be connected to the same socket connector through an adapter, so that all ports can be intermateable and different components can be connected at will. The coaxial connector of the present invention adopts an oil-filled structure, which is small in size, simple in structure, easy to manufacture and low in cost.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of the high-voltage radio frequency coaxial connector socket connector of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the high-voltage radio frequency coaxial connector adapter of the present invention;

[0019] Figure 3 This is a schematic diagram of the external structure of the high-voltage radio frequency coaxial connector socket connector of the present invention;

[0020] Figure 4 This is a schematic diagram of the external structure of the high-voltage radio frequency coaxial connector adapter of the present invention;

[0021] Figure 5 This is a three-dimensional schematic diagram of the high-voltage radio frequency coaxial connector socket connector of the present invention;

[0022] Figure 6 This is a schematic diagram of the high-voltage radio frequency coaxial connector housing of the present invention;

[0023] Figure 7 This is a schematic diagram of the outer conductor of the high-voltage radio frequency coaxial connector of the present invention;

[0024] Figure 8 This is a schematic diagram of the cable head processing of the high-voltage radio frequency coaxial connector of the present invention;

[0025] Figure 9 This is a schematic diagram of the connection between the high-voltage radio frequency coaxial connector socket connector and the socket connector through an adapter of the present invention.

[0026] As shown in the figure:

[0027] 1. Tail fitting; 2. Rear compression screw; 3. Clamping claw; 4. Front compression screw; 5. First O-ring; 6. Bulkhead; 7. Cable insulation; 8. Housing; 9. Inner conductor; 10. Flange; 11. Pin; 12. Outer conductor; 13. Second O-ring; 14. Pin; 15. Oil filling hole; 71. Spiral taper groove; 81. Outer sealing ring groove; 82. Arc step; 121. Sealing ring groove. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means, creative features, objectives and effects achieved by the present invention and make them easier to understand, the following detailed description of the specific implementation method, structure, features and effects of a high-voltage RF coaxial connector provided by the present invention is given in conjunction with the accompanying drawings.

[0029] Example 1

[0030] The present invention provides a high-voltage radio frequency coaxial connector that can connect two coaxial cables. Specifically, a high-voltage radio frequency coaxial connector includes a socket connector and an adapter. The socket connector includes a shell 8, an inner conductor 9, a tail accessory 1, a rear compression screw sleeve 2, a claw 3, a front compression screw sleeve 4, a first O-ring 5, a bulkhead 6, a flange 10, and a pin 11. The adapter includes an outer conductor 12, a second O-ring 13, and a pin 14. The socket connector shell 8 is connected to the tail accessory 1 by a threaded connection. The claw 3 is fixed to the outer conductor 12 by the rear compression screw sleeve 2 and the front compression screw sleeve 4. The first O-ring 5 is installed on the shell 8. The flange 10 is movably connected to the shell 8. The bulkhead 6 is movably installed on the shell 8. The second O-ring 13 of the adapter is installed on the outer conductor 12.

[0031] In this embodiment, there are two high-voltage RF coaxial connectors. The socket connectors are installed through an adapter guide and fixedly connected by a flange 10. The flange 10 is guided by a pin 11 when docked and fixed. The inner conductor 9 is arranged on the axis of the outer shell 8, and the pin 14 is arranged on the axis of the outer conductor 12 and a slot is provided on the head. The two inner conductors 9 are connected between the two socket connectors through the pin 14.

[0032] The receptacle connectors are connected via an adapter to form a sealed cavity filled with insulating oil. Two outer sealing ring grooves 81 and an oil filling hole 15 are provided at the rear of the housing 8. Two sealing ring grooves 121 are provided on the outer side of the adapter outer conductor 12. A spiral taper groove 71 is provided on the cable insulation 7. The insulating oil is benzyltoluene. The taper of the spiral taper groove 71 is 3° and the thickness of the spiral blade is 5. Figure 7 As shown, an O-ring 5 seals the cable insulation and housing 8, while an O-ring 13 seals the housing 8 and the adapter's outer conductor 12. After assembly, the air inside the connector is evacuated through the oiling hole 15 on the housing. Then, insulating oil is injected into the connector cavity through the oiling hole 15 at the other end. This removes air from the connector cavity and improves its pressure resistance.

[0033] Flange 10 is flexibly connected to housing 8 via a collar, and bulkhead 6 is threadedly secured to housing 8. A circular step 82 is provided at the point where the inner diameter of housing 8 changes, with a radius of 4 mm. Housing 8 is made of stainless steel, inner conductor 9 is made of tin bronze, outer conductor 12 is made of brass, and first O-ring 5 is made of neoprene.

[0034] like Figure 6 The cable head shown is processed with spiral grooves to increase its creepage distance.

[0035] like Figure 7As shown, there is no right-angle step on the inner surface of the connector shell. The shell adopts arc steps 82 for transition, uniform electric field, the shell 8 has the same inner diameter as the outer conductor 12, and there is no step mutation; the inner conductor 9 has the same outer diameter as the pin 14, and the outer diameter of the inner conductor 9 is the same as the outer diameter of the inner conductor of the cable, without step mutation, avoiding tip discharge.

[0036] The performance test of the high-voltage RF coaxial connector in this embodiment is shown in the following table:

[0037] project Index requirements Nominal impedance 50Ω Frequency range 0.1~10MHz Operating temperature range -40℃～+80℃ VSWR ≤1.50 Insulation resistance 5000MΩ, min (500V DC) Dielectric withstand voltage 200KV min (DC, 1 minute)

[0038] Example 2

[0039] A high-voltage radio frequency coaxial connector, including a socket connector and an adapter, characterized in that: the socket connector includes a shell 8, an inner conductor 9, a tail accessory 1, a rear compression screw sleeve 2, a claw 3, a front compression screw sleeve 4, a first O-ring 5, a bulkhead 6, a flange 10, and a pin 11; the adapter includes an outer conductor 12, a second O-ring 13, and a pin 14; the socket connector shell 8 is connected to the tail accessory 1 by threads, the claw 3 is fixed to the outer conductor 12 by the rear compression screw sleeve 2 and the front compression screw sleeve 4, the first O-ring 5 is installed on the shell 8, the flange 10 is movably connected to the shell 8, the bulkhead 6 is movably installed on the shell 8, and the second O-ring 13 of the adapter is installed on the outer conductor 12.

[0040] There are more than one high-voltage RF coaxial connector. The socket connectors are guided and installed together using an adapter and fixedly connected by a flange 10. The flange 10 is guided by a pin 11 when docked and fixed. The inner conductor 9 is positioned on the axis of the housing 8, and the pin 14 is positioned on the axis of the outer conductor 12 and has a slotted head. The socket connectors are connected via the adapter to form a sealed cavity filled with insulating oil. The rear end of the housing 8 is provided with three outer sealing ring grooves 81 and two oil filling holes 15. The outer side of the adapter outer conductor 12 is provided with three sealing ring grooves 121. The cable insulation 7 is provided with a spiral taper groove 71. The insulating oil used is benzyltoluene. The spiral taper groove 71 has a taper of 10° and a spiral blade thickness of 30 mm. The flange 10 is flexibly connected to the housing 8 by a clamping ring, and the bulkhead 6 is fixed to the housing 8 by threads. A circular step 82 with a radius of 14 mm is provided at the point where the inner diameter of the housing 8 changes. The outer shell 8 is made of brass, the inner conductor 9 is made of beryllium copper, the outer conductor 12 is made of brass, and the first O-ring 5 is made of chloroprene rubber.

[0041] After experimental testing, the performance test of high-voltage RF coaxial connector is shown in the following table:

[0042] project Index requirements Nominal impedance 50Ω Frequency range 0.1~2MHz Operating temperature range -40℃～+80℃ VSWR ≤1.50 Insulation resistance 5000MΩ, min (500V DC) Dielectric withstand voltage 600KV min (DC, 1 minute)

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage radio frequency coaxial connector, comprising a socket connector and an adapter, characterized in that: The socket connector comprises a shell (8), an inner conductor (9), a tail fitting (1), a rear compression screw sleeve (2), a claw (3), a front compression screw sleeve (4), a first O-ring (5), a bulkhead (6), a flange (10), and a pin (11); the adapter comprises an outer conductor (12), a second O-ring (13), and a pin (14); the socket connector shell (8) is connected to the tail fitting (1) by threads; the claw (3) is fixed to the outer conductor (12) by the rear compression screw sleeve (2) and the front compression screw sleeve (4); the first O-ring (5) is mounted on the shell (8); the flange (10) is movably connected to the shell (8); the bulkhead (6) is movably mounted on the shell (8); and the second O-ring (13) of the adapter is mounted on the outer conductor (12); There are more than one high-voltage radio frequency coaxial connectors, the socket connectors are guided and installed by the adapter and fixedly connected by the flange (10), the flange (10) is guided by the pin (11) when it is docked and fixed, the inner conductor (9) is arranged on the axis of the shell (8), and the pin (14) is arranged on the axis of the outer conductor (12) and has a slot on its head; The tail portion of the housing (8) is provided with two or more outer sealing ring grooves (81) and one or more oil filling holes (15); the outer side of the adapter outer conductor (12) is provided with two or more sealing ring grooves (121); a spiral taper groove (71) is provided on the cable insulation (7); and the cable insulation (7) and the housing (8) are sealed by the first O-ring (5).

2. The high-voltage radio frequency coaxial connector according to claim 1, wherein: The socket connectors are connected to each other through an adapter to form a sealed cavity, which is filled with insulating oil.

3. The high-voltage radio frequency coaxial connector according to claim 2, wherein: The insulating oil is benzyltoluene, the spiral taper slot (71) has a taper of 3° to 10°, and the spiral blade has a thickness of 5 to 30 mm.

4. The high-voltage radio frequency coaxial connector according to claim 1 or 2, characterized in that: The flange (10) is movably connected to the housing (8) via a clamping ring, and the bulkhead (6) is fixedly mounted on the housing (8) via threads.

5. The high-voltage radio frequency coaxial connector according to claim 1 or 2, characterized in that: A circular arc step (82) is provided at a location where the inner diameter of the housing (8) changes, and the arc radius of the circular arc step (82) is not less than 4 mm.

6. The high-voltage radio frequency coaxial connector according to claim 5, characterized in that: The shell (8) is made of brass or stainless steel, the inner conductor (9) is made of tin bronze or beryllium bronze, the outer conductor (12) is made of brass, and the first O-ring (5) is made of chloroprene rubber.

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