A high voltage DC integrated transmission line for neutral beam injection device

Abstract

The invention discloses a high-voltage direct current integrated transmission line for a neutral beam injection device. The high-voltage direct current integrated transmission line mainly comprises a main high-voltage conductor, a plurality of secondary high-voltage conductors, a main support insulator, a plurality of secondary inclined-stayed insulators, a grounded shielding shell, a high-voltage metal insert, a low-voltage metal insert, a particle capture trap, a waveguide placed inside the main high-voltage conductor for transmitting radio frequency signals, a busbar or a coaxial cable for providing power supply that meets design index requirements to its load, a signal line or an optical fiber for transmitting various diagnostic signals from a radio frequency negative ion source, and a metal bracket and an insulating gas supporting the waveguide, busbar or coaxial cable and the signal line or optical fiber inside the main high-voltage conductor. The high-voltage insulated power transmission problem of the power supply system of the neutral beam injection device of the radio frequency negative ion source is solved, and a high-voltage insulated transmission channel with good insulation performance is provided for the radio frequency waveguide signal and various diagnostic signals required by the radio frequency negative ion source.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage power transmission, in particular to a high-voltage direct current integrated transmission line applied to a neutral beam injection device. Background Art

[0002] The high-voltage DC integrated transmission line of the radio frequency negative ion source neutral beam injection device is used to connect the negative ion acceleration power supply, negative ion extraction power supply and negative ion source auxiliary power supply to the corresponding load, as well as to transmit various diagnostic measurement signals of the radio frequency negative ion source. However, the existing high-voltage cables are unable to carry many wires or conductors such as radio frequency waveguides, busbars or coaxial cables and diagnostic signal lines or optical fibers of the power supply system of the radio frequency negative ion source neutral beam injection device. The existing gas-insulated transmission lines are all coaxial structures, which cannot meet the requirements for simultaneous transmission of multiple voltages of the power supply system of the radio frequency negative ion source neutral beam injection device. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a high-voltage DC integrated transmission line for a neutral beam injection device, so as to solve the problem that the existing high-voltage cables and gas-insulated transmission lines cannot meet the needs of the power supply system of the radio frequency negative ion source neutral beam injection device to transmit radio frequency signals, provide power supply, and provide various diagnostic signal transmission channels for the radio frequency negative ion source and high-voltage insulation power transmission.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A high-voltage DC integrated transmission line for a neutral beam injection device, comprising a main high-voltage conductor, a plurality of secondary high-voltage conductors, a main support insulator, a plurality of secondary oblique insulators, a grounded shielding shell, a high-voltage metal insert, a low-voltage metal insert, a particle capture trap, and a radio frequency waveguide, a busbar or a coaxial cable, and a signal line or an optical fiber placed inside the main high-voltage conductor, and a metal bracket supporting the waveguide, busbar or coaxial cable, and the signal line or optical fiber inside the main high-voltage conductor, an insulating gas, and a metal shielding circular plate welded on the main high-voltage conductor, a plurality of secondary high-voltage conductors, and the grounded shielding shell;

[0006] The main post insulator and the secondary diagonal insulator both include embedded high-voltage metal inserts and low-voltage metal inserts; the main high-voltage conductor is arranged with the eccentric axis of the grounded shielding shell and is installed on the lower side of the center position of the grounded shielding shell, and the secondary high-voltage conductor is arranged on the left side of the center position of the grounded shielding shell; the inside of the grounded shielding shell is filled with the insulating gas at a certain pressure; the main high-voltage conductor is supported by the main post insulator, and the secondary high-voltage conductor is fixed by the secondary diagonal insulator; particle capture traps are installed at appropriate positions on the upper surface of the grounded shielding shell on both sides of the main post insulator.

[0007] Furthermore, the main high-voltage conductor, the multiple secondary high-voltage conductors and the grounded shielding shell are all cylindrical hollow conductors, the main post insulator and the multiple secondary inclined insulators are all cylindrical in shape, the high-voltage metal insert and the low-voltage metal insert are all elliptical or elliptical-cylindrical in shape, and the main high-voltage conductor, the multiple secondary high-voltage conductors and the grounded shielding shell are all made of aluminum alloy.

[0008] Furthermore, the insulating gas is SF6, SF6 / N2 mixed gas, C4F7N / CO2 mixed gas or C4F7N / N2 mixed gas.

[0009] Furthermore, the main post insulator and the multiple secondary oblique-pull insulators are made of epoxy glass fiber, epoxy resin or ceramic material, and the high-voltage side thereof is embedded with the high-voltage metal insert, and the low-voltage side thereof is embedded with the low-voltage metal insert, and the large radius of the circular surface of the high-voltage metal insert and the low-voltage metal insert is smaller than the column radius of the corresponding main post insulator and secondary oblique-pull insulator.

[0010] Furthermore, the main high-voltage conductor, the high-voltage metal insert, the main post insulator, the low-voltage metal insert and the grounded shielding shell are respectively fixedly connected with bolts, and the multiple secondary high-voltage conductors, the high-voltage metal insert, the multiple secondary inclined insulators, the low-voltage metal insert and the grounded shielding shell are also respectively fixedly connected with bolts.

[0011] Furthermore, the main high-voltage conductor, the multiple secondary high-voltage conductors and the grounded shielding shell are fixedly connected to the main post insulator and the multiple secondary oblique insulators by welded metal shielding circular plates with rounded corners of a certain thickness and a diameter larger than the diameter of the main post insulator and the secondary oblique insulator at the corresponding locations.

[0012] Furthermore, the internal space of the main high-voltage conductor accommodates the radio frequency waveguide, busbar or coaxial cable and the signal line or optical fiber required by the radio frequency negative ion source.

[0013] Furthermore, the particle capture trap is composed of a cylindrical metal plate with a series of continuous through-type slots of equal width, and the material thereof is aluminum alloy, and the outer radius thereof is consistent with the inner radius of the grounded shielding shell.

[0014] Furthermore, the high-voltage metal insert, the main high-voltage conductor, and the plurality of secondary high-voltage conductors are at the same potential, and the low-voltage metal insert, the particle capture trap, and the grounded shielding shell are at the same potential.

[0015] Beneficial effects:

[0016] 1. In the present invention, the insulation strength of the multi-level high-voltage direct current integrated transmission line is effectively improved by means of insulating gas, insulators and their embedded metal inserts and metal shielding circular plates.

[0017] 2. In the present invention, the multi-level high voltage transmission problem of the multi-level high voltage direct current integrated transmission line is solved by the main high voltage conductor and other multi-level high voltage conductors.

[0018] 3. In the present invention, the conductive metal particles that may be generated inside the multi-level high-voltage DC transmission line are effectively suppressed by the particle capture trap, thereby improving the insulation performance of the multi-level high-voltage DC integrated transmission line.

[0019] 4. The present invention effectively solves the problem of high-voltage insulated power transmission in the power supply system of the radio frequency negative ion source neutral beam injection device, and provides a high-voltage insulated transmission channel with good insulation performance for the radio frequency waveguide signals and various diagnostic signals required by the radio frequency negative ion source. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure and composition of a high-voltage DC integrated transmission line embodiment of the present invention applied to a neutral beam injection device and a cross-sectional view thereof;

[0021] Figure 2 It is a schematic diagram of the internal structure and composition cross section of the main high-voltage conductor of the present invention;

[0022] Figure 3a It is a schematic diagram of the structure and cross section of the main post insulator and the metal insert embedded therein of the present invention;

[0023] Figure 3b The structure and cross-sectional diagram of the oblique-pull insulator and the metal insert embedded therein of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the particle capture trap of the present invention.

[0025] Among them, 1 is the main high-voltage conductor, 2 is the secondary high-voltage conductor, 3 is the main support insulator, 4 is the secondary inclined insulator, 5 is the grounded shielding shell, 6 is the high-voltage metal insert, 7 is the low-voltage metal insert, 8 is the particle capture trap, 9 is the radio frequency waveguide, busbar or coaxial cable and signal line or optical fiber, 10 is the metal bracket, 11 is the insulating gas, and 12 is the metal shielding circular plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0027] like Figure 1 , Figure 2 , Figure 3a , Figure 3b and Figure 4 As shown, the high-voltage DC integrated transmission line for neutral beam injection device of the present invention mainly consists of a main high-voltage conductor 1, a plurality of secondary high-voltage conductors 2, a main support insulator 3, a plurality of secondary diagonal insulators 4, a grounded shielding shell 5, a high-voltage metal insert 6, a low-voltage metal insert 7, a particle capture trap 8, and a radio frequency waveguide, busbar or coaxial cable, and a signal line or optical fiber 9 placed inside the main high-voltage conductor 1, as well as a metal bracket 10 supporting the waveguide, busbar or coaxial cable, and signal line or optical fiber 9 inside the main high-voltage conductor 1, an insulating gas 11, and a metal shielding circular plate 12 welded on the main high-voltage conductor 1, the secondary high-voltage conductor 2, and the grounded shielding shell 5. Among them, the radio frequency waveguide, busbar or coaxial cable, and signal line or optical fiber 9 are waveguides for transmitting radio frequency signals, busbars or coaxial cables for providing power supply that meets the design index requirements to their loads, and signal lines or optical fibers for transmitting various diagnostic signals from radio frequency negative ion sources. The main support insulator 3 and the secondary diagonal insulator 4 both contain embedded high-voltage metal inserts 6 and low-voltage metal inserts 7. The main high-voltage conductor 1 is arranged eccentrically with the grounding shielding shell 5 and is installed at the lower side of the center position of the grounding shielding shell 5, and the secondary high-voltage conductor 2 is arranged at the upper left side of the center position of the grounding shielding shell 5. The grounding shielding shell 5 is filled with the insulating gas 11 at a certain pressure. The main high-voltage conductor 1 is supported by the main post insulator 3, and the secondary high-voltage conductor 2 is fixed by the secondary diagonal insulator 4. Particle capture traps 8 are installed at appropriate positions on the upper surface of the grounding shielding shell 5 on both sides of the main post insulator 3.

[0028] The main high-voltage conductor 1, the secondary high-voltage conductor 2 and the grounded shielding shell 5 are all cylindrical hollow conductors, the main post insulator 3 and the secondary inclined insulator 4 are both cylindrical in shape, the high-voltage metal insert 6 and the low-voltage metal insert 7 are both elliptical or elliptical cylindrical in shape, and the main high-voltage conductor 1, the secondary high-voltage conductor 2 and the grounded shielding shell 5 are all made of aluminum alloy.

[0029] The insulating gas 11 may be SF6, SF6 / N2 mixed gas, C4F7N / CO2 mixed gas or C4F7N / N2 mixed gas.

[0030] The main post insulator 3 and the secondary oblique-pull insulator 4 can be made of epoxy glass fiber, epoxy resin or ceramic material, and the high-voltage side thereof is embedded with the high-voltage metal insert 6, and the low-voltage side is embedded with the low-voltage metal insert 7. The large radius of the circular surface of the high-voltage metal insert 6 and the low-voltage metal insert 7 is smaller than the column radius of the corresponding main post insulator 3 and the secondary oblique-pull insulator 4.

[0031] The main high-voltage conductor 1, the high-voltage metal insert 6, the main support insulator 3, the low-voltage metal insert 7 and the grounding shielding shell 5 are fixedly connected with bolts respectively, and the secondary high-voltage conductor 2, the high-voltage metal insert 6, the secondary oblique-stayed insulator 4, the low-voltage metal insert 7 and the grounding shielding shell 5 are also fixedly connected with bolts respectively.

[0032] The internal space of the main high-voltage conductor 1 can accommodate the radio frequency waveguide, busbar or coaxial cable and the signal line or optical fiber 9 required by the radio frequency negative ion source, and the radio frequency waveguide, busbar or coaxial cable and the signal line or optical fiber 9 inside it are supported by a metal bracket 10 with an insulating material coated on the surface.

[0033] The particle capture trap 8 is composed of a cylindrical metal plate with a series of continuous through-type slots of equal width, and is made of aluminum alloy. The outer radius is consistent with the inner radius of the grounded shielding shell 5 .

[0034] The high voltage metal insert 6 and the main high voltage conductor 1 and the secondary high voltage conductor 2 are at the same potential, and the low voltage metal insert 7 , the particle capture trap 8 and the grounded shielding shell 5 are at the same potential.

[0035] In the embodiment of the present invention, a metal shielding circular plate 12 with a certain thickness and a diameter larger than the diameter of the main post insulator 3 and the secondary oblique insulator 4 at the fixed connection points between the main high-voltage conductor 1, the secondary high-voltage conductor 2 and the grounded shielding shell 5 and the main post insulator 3 and the secondary oblique insulator 4 is welded, and then the main post insulator 3 and the main high-voltage conductor 1 are installed in sequence on the grounded shielding shell 5 with bolts, and then the secondary oblique insulator 4 and the secondary high-voltage conductor 2 are installed in sequence with bolts, and then a particle capture trap 8 is installed near the main post insulator 3 and on the inner surface of the grounded shielding shell 5 with bolts, and then a metal bracket 10 is installed inside the main high-voltage conductor, and waveguides, busbars or coaxial cables and signal lines or optical fibers 9 for transmitting radio frequency signals are installed in sequence, and finally the inside of the grounded shielding shell 5 is filled with insulating gas 11 with a certain pressure.

[0036] In the present invention, the problem of high-voltage insulation power transmission in the power supply system of the radio frequency negative ion source neutral beam injection device is effectively solved by multi-level high-voltage conductors and multi-level insulators, and a high-voltage insulation transmission channel with good insulation performance is provided for the radio frequency waveguide signals and various diagnostic signals required by the radio frequency negative ion source.

[0037] According to the embodiments of the present invention, the insulation strength of the multi-level high-voltage direct current integrated transmission line is effectively improved by the insulating gas, the insulator and the embedded metal inserts and the metal shielding circular plate.

[0038] According to the embodiment of the present invention, the multi-level high voltage transmission problem of the multi-level high voltage direct current integrated transmission line is solved by using the main high voltage conductor and other multi-level high voltage conductors.

[0039] According to the embodiment of the present invention, the metal conductive particles that may be generated inside the multi-level high-voltage DC integrated transmission line are effectively suppressed by the particle capture trap, thereby improving the insulation performance of the multi-level high-voltage DC integrated transmission line.

[0040] Although the above describes the illustrative specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention, and it should be clear that the present invention is not limited to the scope of the specific embodiments, for those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A high voltage DC integrated transmission line for a neutral beam injection device, characterized in that: It includes a main high-voltage conductor, a plurality of secondary high-voltage conductors, a main post insulator, a plurality of secondary inclined insulators, a grounded shielding shell, a high-voltage metal insert, a low-voltage metal insert, a particle capture trap, and a radio frequency waveguide, a busbar or a coaxial cable, and a signal line or an optical fiber placed inside the main high-voltage conductor, and a metal bracket supporting the radio frequency waveguide, busbar or coaxial cable, and a signal line or an optical fiber inside the main high-voltage conductor, an insulating gas, and a metal shielding circular plate welded on the main high-voltage conductor, a plurality of secondary high-voltage conductors, and the grounded shielding shell; The main post insulator and the secondary diagonal insulator both include embedded high-voltage metal inserts and low-voltage metal inserts; the main high-voltage conductor is arranged with the eccentric axis of the grounded shielding shell and is installed on the lower side of the center position of the grounded shielding shell, and the secondary high-voltage conductor is arranged on the left side of the center position of the grounded shielding shell; the inside of the grounded shielding shell is filled with the insulating gas at a certain pressure; the main high-voltage conductor is supported by the main post insulator, and the secondary high-voltage conductor is fixed by the secondary diagonal insulator; particle capture traps are installed at appropriate positions on the upper surface of the grounded shielding shell on both sides of the main post insulator.

2. A high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The main high-voltage conductor, the multiple secondary high-voltage conductors and the grounded shielding shell are all cylindrical hollow conductors, the main post insulator and the multiple secondary inclined insulators are all cylindrical in shape, the high-voltage metal insert and the low-voltage metal insert are all elliptical or elliptical-cylindrical in shape, and the main high-voltage conductor, the multiple secondary high-voltage conductors and the grounded shielding shell are all made of aluminum alloy.

3. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The insulating gas is SF6, SF6 / N2 mixed gas, C4F7N / CO2 mixed gas or C4F7N / N2 mixed gas.

4. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The main post insulator and the plurality of secondary oblique-pull insulators are made of epoxy glass fiber, epoxy resin or ceramic material, and the high-voltage side thereof is embedded with the high-voltage metal insert, and the low-voltage side thereof is embedded with the low-voltage metal insert, and the large radius of the circular surface of the high-voltage metal insert and the low-voltage metal insert is smaller than the column radius of the corresponding main post insulator and secondary oblique-pull insulator.

5. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The main high-voltage conductor, the high-voltage metal insert, the main post insulator, the low-voltage metal insert and the grounded shielding shell are respectively fixedly connected by bolts, and the multiple secondary high-voltage conductors, the high-voltage metal insert, the multiple secondary oblique-stayed insulators, the low-voltage metal insert and the grounded shielding shell are also respectively fixedly connected by bolts.

6. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The main high-voltage conductor, the multiple secondary high-voltage conductors, the grounded shielding shell, the main post insulator and the multiple secondary oblique insulators are all fixedly connected with a metal shielding circular plate with a certain thickness and a diameter larger than the diameter of the main post insulator and the secondary oblique insulator at the corresponding position.

7. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The internal space of the main high-voltage conductor accommodates the radio frequency waveguide, busbar or coaxial cable and the signal line or optical fiber required by the radio frequency negative ion source.

8. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The particle capture trap is composed of a cylindrical metal plate with a series of continuous through-type slots of equal width, and is made of aluminum alloy, with an outer radius consistent with the inner radius of the grounded shielding shell.

9. The high voltage DC integrated transmission line for a neutral beam injection device according to claim 1, characterized in that: The high-voltage metal insert, the main high-voltage conductor, and the plurality of secondary high-voltage conductors are at the same potential, and the low-voltage metal insert, the particle capture trap, and the grounded shielding shell are at the same potential.

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