Split type gradient buffer glass-metal electrical penetration assembly

Abstract

The invention provides a split type gradient buffer glass-metal electrical penetration assembly, and relates to the technical field of nuclear reactor electrical penetration assembly manufacturing. The split type gradient buffer glass-metal electrical penetration assembly comprises an outer containment, an inner containment, a wire core, an outer glass blank, an inner glass blank, an outer gasket, a pressure gauge and an inner gasket. The inner containment and the outer containment are connected, and a through channel is formed inside the inner containment and the outer containment. The wire core passes through the through channel. And the inner gasket is arranged in a gap between the inner containment and the wire core. And the outer gasket is arranged in a gap between the outer containment and the wire core. And the outer glass blank is arranged on the outer side of the outer gasket and is filled in a gap between the outer containment and the wire core. And the inner glass blank is arranged on the outer side of the inner gasket and is filled in a gap between the inner containment and the wire core. The pressure gauge is connected in a lateral mounting hole in the outer containment in a sealing manner and is used for monitoring the real-time air pressure in a sealed cavity formed by enclosing the inner containment, the outer containment, the outer gasket, the inner gasket and the wire core. The use is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing nuclear reactor electrical penetration pieces, in particular to a split gradient buffer glass-metal electrical penetration piece. Background Art

[0002] Electrical penetrations are key components in a nuclear reactor's containment vessel, allowing cables to pass through. Their primary function is to ensure the continuity of electrical signal or power transmission under extreme operating conditions such as high temperature, high pressure, and high radiation, while maintaining the containment's integrity and preventing the leakage of radioactive materials. These devices must possess excellent airtightness, electrical insulation, and structural strength, making them a core component for the safe operation of nuclear power plants.

[0003] Traditional electrical penetrations often use organic materials for insulation and sealing. While they offer good initial performance, they are susceptible to aging, embrittlement, and creep during long-term operation due to high temperatures, humidity, and radiation exposure. This can lead to a decline in sealing and insulation performance and the risk of failure. To improve their service stability, glass-to-metal packaging technology has been gradually introduced. However, existing glass-to-metal electrical penetrations still present several key issues, such as seal damage caused by interface stress concentration, structural failure due to material thermal expansion mismatch, and the rigidity of the core structure, which easily transmits mechanical stress. These issues can lead to reduced sealing and even failure.

[0004] How to monitor the sealing performance of electrical penetrations has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] The object of the present invention is to provide a split gradient buffer glass-metal electrical penetration piece, which can monitor the sealing performance of the split gradient buffer glass-metal electrical penetration piece in real time, thereby improving the safety of use.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] The present invention provides a split type gradient buffer glass-metal electrical penetration piece, comprising an outer containment shell, an inner containment shell, a wire core, an outer glass embryo, an inner glass embryo, an outer gasket, a pressure gauge and an inner gasket;

[0008] The inner containment shell and the outer containment shell are connected and form a through passage therein;

[0009] The wire core is passed through the through channel;

[0010] The inner gasket is arranged in the gap between the inner containment shell and the wire core;

[0011] The outer gasket is arranged in the gap between the outer containment shell and the wire core;

[0012] The outer glass embryo is arranged on the outer side of the outer gasket and fills the gap between the outer containment shell and the wire core, and the outer glass embryo is sealed and connected to the outer containment shell and the wire core through melting and sintering;

[0013] The inner glass embryo is arranged on the outer side of the inner gasket and fills the gap between the inner containment shell and the wire core, and the inner glass embryo is sealed and connected to the inner containment shell and the wire core through melting and sintering;

[0014] The pressure gauge is sealed and connected to the lateral mounting hole on the outer containment shell, and is used to monitor the real-time air pressure in the sealed cavity formed by the inner containment shell, the outer containment shell, the outer gasket, the inner gasket and the wire core.

[0015] In an optional embodiment, the outer containment shell and the inner containment shell are formed separately and sealed by laser ring welding.

[0016] In an optional embodiment, the inner sides of the outer containment shell and the inner containment shell are divided into three sections of holes, namely, the outer end glass embryo countersunk hole, the middle through hole and the inner cavity hole;

[0017] The central through hole of the outer containment shell and the outer gasket are interference fit, and both end surfaces of the outer gasket are aligned with both end surfaces of the central through hole of the outer containment shell;

[0018] The central through hole of the inner containment shell and the inner gasket are interference fit, and the two end surfaces of the inner gasket are aligned with the two end surfaces of the central through hole of the inner containment shell;

[0019] The outer glass embryo is arranged in the outer end glass embryo countersunk hole of the outer containment shell, and the distance between the outer end and the outer end surface of the outer containment shell is 10 mm;

[0020] The inner glass embryo is arranged in the outer end glass embryo countersunk hole of the inner containment shell, and the distance between the outer end and the outer end surface of the inner containment shell is 10 mm;

[0021] The outer glass embryo and the inner glass embryo are symmetrically arranged with respect to a connection surface between the outer containment shell and the inner containment shell.

[0022] The lateral mounting hole is communicated with the internal cavity hole of the outer containment shell, and the pressure gauge is connected to the lateral mounting hole in an interference fit manner.

[0023] In an optional embodiment, the outer gasket and the inner gasket are made of graphite material.

[0024] In an optional embodiment, a corrugated tube structure is provided in the middle of the wire core, and the corrugated tube structure includes a plurality of corrugated portions arranged at equal intervals and connected in sequence, and each of the corrugated portions is in an arc shape.

[0025] In an optional embodiment, the outer containment vessel is made of Kovar alloy, and the outer glass embryo is made of borosilicate glass; the inner containment vessel is made of chrome steel, and the inner glass embryo is made of aluminosilicate glass.

[0026] In an optional embodiment, the detection head of the pressure gauge penetrates into the inner cavity hole of the outer containment vessel to a depth of 5 mm.

[0027] In an optional embodiment, the outer glass embryo and the outer containment shell are matched and sealed to form a first-level sealing interface, the inner glass embryo and the inner containment shell are matched and sealed to form a second-level sealing interface, and the wire core is matched and sealed with the inner glass embryo and the outer glass embryo respectively to form an internal sealing surface to form a split gradient buffer electrical penetration.

[0028] The split gradient buffer glass-metal electrical penetration provided by the present invention has the following beneficial effects:

[0029] 1. The pressure gauge design of the present invention can monitor the pressure inside the cavity of the electrical penetration in real time. When an accident occurs or the sealing performance of the electrical penetration is degraded, data can be fed back in time to prevent radiation inside the inner containment and protect the safety of workers.

[0030] 2. This invention employs different glass-to-metal seals at both ends of the electrical penetration. By varying the glass-to-metal material combination, a glass-to-metal combination suitable for high sealing performance on the outside and a glass-to-metal combination suitable for accident conditions such as high temperatures on the inside are found. This improves the sealing performance of the electrical penetration while enhancing its adaptability to accident conditions, improving its adaptability and sealing performance.

[0031] 3. The present invention designs the middle part of the wire core into a bellows structure, which can reduce the stress caused by shape changes during glass-to-metal sealing. At the same time, when the equipment encounters special working conditions such as earthquakes, its bellows structure can provide internal stress buffering for the electrical penetrations, thereby improving the reliability and safety of the electrical penetrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic cross-sectional view of a split-type gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0034] Figure 2 A schematic structural diagram of the outer glass blank of a split gradient buffer glass-metal electrical penetration component provided in an embodiment of the present invention;

[0035] Figure 3 A schematic structural diagram of the inner glass blank of a split-type gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0036] Figure 4 A schematic structural diagram of an inner gasket of a split-type gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0037] Figure 5 A cross-sectional view of the inner containment of a split gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0038] Figure 6 A cross-sectional view of the outer containment of a split gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0039] Figure 7 A structural diagram of the outer core of a split-type gradient buffered glass-metal electrical penetration provided by an embodiment of the present invention;

[0040] Figure 8 A schematic structural diagram of the outer gasket of a split gradient buffered glass-metal electrical penetration provided in an embodiment of the present invention.

[0041] Icon: 1-outer containment; 2-inner containment; 3-wire core; 4-outer glass embryo; 5-outer gasket; 6-inner glass embryo; 7-pressure gauge; 8-inner gasket. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0047] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0048] The overall structure, working principle and technical effects of the split gradient buffer glass-metal electrical penetration provided by the present invention are described in detail below through embodiments and in conjunction with the accompanying drawings.

[0049] Please refer to Figures 1 to 8 In this embodiment, a split-type gradient buffered glass-metal electrical penetration comprises an outer containment shell 1, an inner containment shell 2, a core 3, an outer glass preform 4, an inner glass preform 6, an outer gasket 5, a pressure gauge 7, and an inner gasket 8. The inner containment shell 2 is connected to the outer containment shell 1, forming a through-channel therein. The core 3 is disposed within the through-channel. The inner gasket 8 is disposed in the gap between the inner containment shell 2 and the core 3. The outer gasket 5 is disposed in the gap between the outer containment shell 1 and the core 3. The outer glass preform 4 is disposed outside the outer gasket 5 and fills the gap between the outer containment shell 1 and the core 3. The outer glass preform 4 is sealed to the outer containment shell 1 and the core 3 through fusion sintering. The inner glass preform 6 is disposed outside the inner gasket 8 and fills the gap between the inner containment shell 2 and the core 3. The inner glass preform 6 is sealed to the inner containment shell 2 and the core 3 through fusion sintering. The pressure gauge 7 is sealed and connected to the lateral mounting hole on the outer containment shell 1, and is used to monitor the real-time air pressure in the sealed cavity formed by the inner containment shell 2, the outer containment shell 1, the outer gasket 5, the inner gasket 8 and the core 3.

[0050] This embodiment can monitor the pressure inside the cavity of the electrical penetration component in real time by adding the design of the pressure gauge 7. When encountering an accident condition or the sealing performance of the electrical penetration component is reduced, data can be fed back in time to prevent radiation inside the inner containment 2 and protect the safety of the staff.

[0051] Furthermore, the wire core 3 passes through the inner containment shell 2 and the outer containment shell 1. The wire core 3, the inner containment shell 2 and the outer containment shell 1 are kept coaxial and symmetrical.

[0052] In this embodiment, the inner sides of both the outer containment shell 1 and the inner containment shell 2 are divided into three sections: an outer glass blank counterbore, a central through-hole, and an internal cavity hole. The central through-hole of the outer containment shell 1 employs an interference fit with the outer gasket 5, with the end faces of the outer gasket 5 aligned with the end faces of the central through-hole of the outer containment shell 1. The central through-hole of the inner containment shell 2 employs an interference fit with the inner gasket 8, with the end faces of the inner gasket 8 aligned with the end faces of the central through-hole of the inner containment shell 2. The outer glass blank 4 is positioned within the outer glass blank counterbore of the outer containment shell 1, with the outer end thereof 10 mm away from the outer end face of the outer containment shell 1. The inner glass blank 6 is positioned within the outer glass blank counterbore of the inner containment shell 2, with the outer end thereof 10 mm away from the outer end face of the inner containment shell 2. The outer glass blank 4 and the inner glass blank 6 are positioned symmetrically about the connection plane between the outer containment shell 1 and the inner containment shell 2. The lateral mounting hole is communicated with the inner cavity hole of the outer containment vessel 1 , and the pressure gauge 7 is connected to the lateral mounting hole by means of interference fit.

[0053] Please refer to Figures 1 to 8 Furthermore, the outer glass embryo 4 is matched and sealed with the outer containment shell 1 to form a first-level sealing interface, the inner glass embryo 6 is matched and sealed with the inner containment shell 2 to form a second-level sealing interface, and the wire core 3 is matched and sealed with the inner glass embryo 6 and the outer glass embryo 4 to form an internal sealing surface, thereby forming a split gradient buffer electrical penetration component.

[0054] Preferably, the outer gasket 5 and the inner gasket 8 are both made of graphite material with low thermal expansion coefficient and good high temperature resistance to improve thermal stability and sealing reliability.

[0055] Furthermore, a bellows structure is provided in the middle of the core 3. The bellows structure comprises a plurality of equally spaced and sequentially connected corrugated portions, each of which is arc-shaped. This bellows structure can absorb axial stress during thermal expansion and contraction or mechanical shock, reducing the impact on the glass-to-metal sealing surface.

[0056] Please refer to Figures 1 to 8 In this embodiment, the maximum outer diameter at the crest of the corrugated tube structure is 3 mm larger than the diameter of the core 3, and the minimum inner diameter at the trough is 3 mm smaller than the diameter of the core 3.

[0057] In this embodiment, the middle part of the wire core 3 is designed as a bellows structure, which can reduce the stress caused by the shape change during the glass-metal sealing. At the same time, when the equipment encounters special working conditions such as earthquakes, its bellows structure can provide internal stress buffering for the electrical penetration components, thereby improving the reliability and safety of the electrical penetration components.

[0058] Furthermore, the outer containment vessel 1 is made of Kovar alloy and the outer glass embryo 4 is made of borosilicate glass, achieving an expansion coefficient matching difference of less than 10%, ensuring high sealing performance at room temperature; the inner containment vessel 2 is made of chrome steel and the inner glass embryo 6 is made of aluminosilicate glass, which can adapt to the high temperature and mechanical stress of accident conditions.

[0059] Furthermore, the detection head of the pressure gauge 7 is inserted into the inner cavity hole of the outer containment vessel 1 to a depth of 5 mm to ensure the accuracy of monitoring.

[0060] The inner containment vessel 2 and outer containment vessel 1 are coaxially aligned, with a 1mm gap between the adjacent end faces to prevent explosions caused by excessive pressure within the chamber during sintering. The finished module, after the inner containment vessel 2 and outer containment vessel 1 are assembled and sintered, is sealed by laser girth welding. The pressure gauge 7 is sealed and mounted in a lateral mounting hole in the outer containment vessel 1.

[0061] refer to Figure 4 、 7 The inner gasket 8 and the outer gasket 5 are kept coaxial with the core 3 and the inner and outer containment shells 2 and 1, and are aligned with the two end faces of the through hole in the middle of the inner and outer containment shells 2 and 1 respectively. Then the outer gasket 5 and the inner gasket 8 are added to the gap between the hole of the outer containment shell 1 and the core 3 on the outside of the assembled inner and outer containment shells 2 and 1, respectively. The outer gasket 5 and the hole of the outer containment shell 1, as well as the inner gasket 8 and the hole of the inner containment shell 2, adopt an interference fit to ensure the coaxiality of the core 3 and the holes of the inner and outer containment shells 2 and 1. The bottom of the outer gasket 5 faces the inner end face of the outer containment shell 1, and the top faces the outer end face. The bottom of the inner gasket 8 faces the inner end face of the inner containment shell 2, and the top faces the outer end face. At the same time, the inner gasket 8 and the outer gasket 5 adopt an interference fit with the core 3 to ensure that the glass will not be left in the cavity during sintering, and the shape of the glass is correct.

[0062] refer to Figure 2 、 6 7. One end of the outer glass embryo 4 is aligned with the end surface of the outer end glass embryo countersunk hole of the outer safety shell 1, and at the same time remains coaxial with the outer safety shell 1 and the wire core 3.

[0063] refer to Figure 3 、 5 7. One end of the inner glass embryo 6 is aligned with the end surface of the outer end glass embryo countersunk hole of the inner containment vessel 2, and at the same time remains coaxial with the inner containment vessel 2 and the wire core 3.

[0064] Next, place the inner glass embryo 6 into the gap formed by the outer core 3 of the gasket and the inner containment vessel 2, and the outer glass embryo 4 into the gap formed by the outer core 3 of the gasket and the outer containment vessel 1. The bottom of the inner glass embryo 6 is aligned with the end surface of the glass embryo countersunk hole at the outer end of the inner containment vessel 2, and the bottom of the outer glass embryo 4 is aligned with the end surface of the glass embryo countersunk hole at the outer end of the outer containment vessel 1. After alignment, a 10mm gap is reserved at the upper end surface to leave room for the sintering mold, completing the modular assembly of the electrical feedthrough before sintering.

[0065] The mold is fixed in the space reserved on both sides of the inner glass embryo 6 and the outer glass embryo 4 to ensure the shape of the glass during sintering, and a sintering process of heating, melting, cooling and annealing is performed to complete the sealing between glass and metal.

[0066] Please refer to Figures 1 to 8 In this embodiment, the outer containment shell 1 and the inner containment shell 2 are formed separately and sealed by laser ring welding.

[0067] Laser ring welding technology is used to perform welding and sealing treatment around the weld left between the inner containment shell 2 and the outer containment shell 1, and the outer containment shell 1 is welded into a whole. At this time, the gas in the sealed cavity formed by the inner containment shell 2 and the outer containment shell 1 can only flow through the side mounting hole pressure gauge 7 of the outer containment shell 1.

[0068] Please refer to Figures 1 to 8 In the manufacturing process of the present invention, the wire core 3 is first installed through the through-channel between the inner containment shell 2 and the outer containment shell 1, and is kept strictly coaxial with the two containment shells. Subsequently, the inner gasket 8 and the outer gasket 5 are respectively installed in the central through-holes of the inner containment shell 2 and the outer containment shell 1. Both are fixed in the hole bodies by interference fit, and their end faces are aligned with the end faces of the central through-holes of the corresponding containment shells. The inner diameters of the inner gasket 8 and the outer gasket 5 also adopt an interference fit with the wire core 3, thereby ensuring the coaxial positioning accuracy between the wire core 3 and the two containment shells, and forming an effective limit for the glass melt during the subsequent sintering process to prevent it from flowing into the central cavity area.

[0069] Next, the outer glass embryo 4 is assembled onto the outer gasket 5, filling the gap between the outer containment vessel 1 and the core 3. The inner glass embryo 6 is assembled onto the inner gasket 8, filling the gap between the inner containment vessel 2 and the core 3. A 10mm clearance is reserved on the outer end face to allow for the installation of the sintering mold. After the mold is secured, the entire assembly undergoes a sintering process involving heating, melting, and cooling annealing. This creates a high-density glass-to-metal seal between the glass embryo, the metal containment vessel, and the core 3 at high temperatures.

[0070] After the inner and outer glass surfaces are sintered and cooled, laser ring welding is used to seal the joints between the inner containment vessel 2 and the outer containment vessel 1, forming a single structure. Before welding, a 1mm gap is reserved to slowly release the cavity pressure that may occur during sintering, thereby preventing risks such as explosion and stress concentration.

[0071] Finally, the pressure gauge 7 is installed in the lateral mounting hole of the outer containment shell 1 by interference fit. Its detection head penetrates about 5 mm into the cavity, and can monitor the absolute air pressure in the sealed cavity composed of the inner containment shell 2, the outer containment shell 1, the gasket and the wire core 3 in real time, which is used to evaluate the sealing integrity and operational safety of the glass-metal sealing interface.

[0072] In summary, the present application seals the pressure gauge 7 in the lateral mounting hole of the outer containment shell 1. The pressure gauge 7 is designed to monitor the pressure inside the cavity of the electrical penetration component in real time. When an accident condition occurs or the sealing performance of the electrical penetration component decreases, data can be fed back in time to prevent radiation inside the inner containment shell 2 and protect the safety of the staff.

[0073] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A split gradient buffer glass-metal electrical penetration, characterized in that: It comprises an outer containment shell (1), an inner containment shell (2), a wire core (3), an outer glass embryo (4), an inner glass embryo (6), an outer gasket (5), a pressure gauge (7) and an inner gasket (8); The inner containment shell (2) is connected to the outer containment shell (1), and a through passage is formed inside the inner containment shell; The wire core (3) is passed through the through channel; The inner gasket (8) is arranged in the gap between the inner containment shell (2) and the wire core (3); The outer gasket (5) is arranged in the gap between the outer containment shell (1) and the wire core (3); The outer glass embryo (4) is arranged on the outside of the outer gasket (5) and fills the gap between the outer containment shell (1) and the wire core (3), and the outer glass embryo (4) is sealed and connected to the outer containment shell (1) and the wire core (3) through melting and sintering; The inner glass embryo (6) is arranged on the outside of the inner gasket (8) and fills the gap between the inner containment shell (2) and the wire core (3), and the inner glass embryo (6) is sealed and connected to the inner containment shell (2) and the wire core (3) through melting and sintering; The pressure gauge (7) is sealed and connected to a lateral mounting hole on the outer containment shell (1) and is used to monitor the real-time air pressure in the sealed cavity formed by the inner containment shell (2), the outer containment shell (1), the outer gasket (5), the inner gasket (8) and the wire core (3).

2. The split gradient buffer glass-metal electrical penetration according to claim 1, characterized in that: The outer containment shell (1) and the inner containment shell (2) are formed separately and sealed by laser ring welding.

3. The split gradient buffer glass-metal electrical penetration according to claim 1 or 2, characterized in that: The inner sides of the outer containment shell (1) and the inner containment shell (2) are divided into three sections of holes, namely, an outer end glass embryo countersunk hole, a middle through hole, and an inner cavity hole; The central through hole of the outer containment shell (1) and the outer gasket (5) are in interference fit, and both end surfaces of the outer gasket (5) are aligned with both end surfaces of the central through hole of the outer containment shell (1); The central through hole of the inner containment shell (2) and the inner gasket (8) are in interference fit, and the two end faces of the inner gasket (8) are aligned with the two end faces of the central through hole of the inner containment shell (2); The outer glass embryo (4) is arranged in the outer end glass embryo countersunk hole of the outer safety shell (1), and the distance between the outer end and the outer end surface of the outer safety shell (1) is 10 mm; The inner glass embryo (6) is arranged in the outer end glass embryo countersunk hole of the inner containment shell (2), and the distance between the outer end and the outer end surface of the inner containment shell (2) is 10 mm; The outer glass embryo (4) and the inner glass embryo (6) are symmetrically arranged with respect to the connection surface between the outer containment shell (1) and the inner containment shell (2); The lateral mounting hole is in communication with the internal cavity hole of the outer containment shell (1), and the pressure gauge (7) is connected to the lateral mounting hole in an interference fit manner.

4. The split gradient buffer glass-metal electrical penetration according to claim 1, characterized in that: The outer gasket (5) and the inner gasket (8) are made of graphite material.

5. The split gradient buffer glass-metal electrical penetration according to claim 1 or 4, characterized in that: A corrugated tube structure is provided in the middle of the wire core (3), and the corrugated tube structure comprises a plurality of corrugated portions arranged at equal intervals and connected in sequence, and each of the corrugated portions is in an arc shape.

6. The split gradient buffer glass-metal electrical penetration according to claim 1, characterized in that: The outer containment vessel (1) is made of Kovar alloy, and the outer glass embryo (4) is made of borosilicate glass; the inner containment vessel (2) is made of chrome steel, and the inner glass embryo (6) is made of aluminosilicate glass.

7. The split type gradient buffer glass-metal electrical penetration according to claim 3, characterized in that: The detection head of the pressure gauge (7) is inserted into the inner cavity hole of the outer containment shell (1) at a depth of 5 mm.

8. The split gradient buffer glass-metal electrical penetration according to claim 1, characterized in that: The outer glass embryo (4) is matched and sealed with the outer containment shell (1) to form a first-level sealing interface, the inner glass embryo (6) is matched and sealed with the inner containment shell (2) to form a second-level sealing interface, and the wire core (3) is matched and sealed with the inner glass embryo (6) and the outer glass embryo (4) to form internal sealing surfaces, thereby forming a split-type gradient buffer electrical penetration component.

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