A ceramic plug-in package assembly, an electrical feedthrough and a method of manufacturing thereof

Abstract

This invention discloses a ceramic encapsulation assembly, an electrical penetration component, and a method for manufacturing the same, relating to the field of electrical equipment technology. The ceramic encapsulation assembly includes a ceramic sheet, a metal housing, and at least one end guide pin. The metal housing is cylindrical and has an axially through mounting cavity. The ceramic sheet covers and seals one end of the metal housing. The end guide pin penetrates the ceramic sheet. Both the ceramic sheet and the metal housing, and the ceramic sheet and the end guide pin, are sealed connections. This invention utilizes ceramic material to seal the electrical penetration component, offering advantages such as high temperature resistance and high insulation.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to a plug-in ceramic encapsulation assembly, an electrical penetration component, and a method for manufacturing the same. Background Technology

[0002] Electrical penetrations (EPPs) are specialized electrical devices installed on the reactor pressure vessel and containment vessel to allow electrical signals to pass through the vessel. Under normal and various accident conditions, including earthquakes and loss-of-coolant accidents, EPPs must ensure the integrity of the reactor vessel and prevent the leakage of radioactive materials. Simultaneously, they must maintain the continuity of electrical and signal transmission between the inside and outside of the vessel. A typical EPP consists of a metal shell, insulating material, and metal pins. The metal shell connects to the reactor vessel and supports the entire structure; the metal pins connect the inside and outside of the reactor vessel, transmitting signals and electrical energy; the insulating material ensures insulation between the metal shell and the metal pins, and between the metal pins themselves, and guarantees the sealing of the reactor vessel. The metal shell is typically made of materials with excellent mechanical properties and radiation resistance, such as 304 stainless steel or SA105. The metal pins are typically made of alloy materials with excellent electrical conductivity, such as 4J29, 4J42, or 4J50. For the insulating material, more mature EPPs utilize organic materials. By leveraging the insulating and elastic properties of organic materials, a certain degree of insulation and sealing can be achieved through extrusion at room temperature. However, with the advancement of nuclear reactor technology, the demand for high-temperature applications has gradually increased, and the requirements for radiation resistance have also gradually improved. Organic materials are prone to aging under high temperatures and radiation, losing their sealing effect and leading to the failure of electrical penetrations.

[0003] In view of this, based on years of experience in production and design in this and related fields, the inventor has designed a plug-in ceramic encapsulation component, an electrical penetration component and its manufacturing method through repeated experiments, in order to solve the problems existing in the prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a plug-in ceramic encapsulation assembly, an electrical penetration component, and a method for manufacturing the same. The electrical penetration component is sealed with ceramic material, resulting in stable insulation and sealing performance.

[0005] To achieve the above objectives, the present invention proposes a plug-in ceramic encapsulation assembly, wherein the plug-in ceramic encapsulation assembly includes a ceramic sheet, a metal shell, and at least one end guide pin. The metal shell is cylindrical and has an axially through mounting cavity. The ceramic sheet covers one end of the metal shell and closes the end. The end guide pin passes through the ceramic sheet. The ceramic sheet and the metal shell, as well as the ceramic sheet and the end guide pin, are sealed connections.

[0006] In the aforementioned plug-in ceramic package assembly, the ceramic sheet is brazed to the metal housing and to the end pin, respectively, by an active metal brazing method.

[0007] The plug-in ceramic package assembly as described above includes a plurality of parallel spaced end guide pins, each of which passes through the ceramic sheet along the axial direction of the mounting cavity.

[0008] In the aforementioned plug-in ceramic encapsulation assembly, the alumina content in the ceramic sheet ranges from 95% to 99%.

[0009] The present invention also proposes a method for manufacturing a plug-in ceramic package assembly, wherein the plug-in ceramic package assembly as described above is manufactured, wherein the ceramic sheet, the end guide pin and the metal shell are connected by active metal brazing to form the plug-in ceramic package assembly.

[0010] The method for manufacturing the connector ceramic package assembly as described above, wherein the brazing process includes:

[0011] Step 1: The metal shell and the end guide pin are brazed together with Cu foil using BNi-2 brazing filler metal. The process involves first heating from room temperature to 300°C at 10°C / min, holding for 10 min, then heating to 500°C at 10°C / min, holding for 10 min, then heating to 900°C at 10°C / min, holding for 10 min, then heating to 1030°C at 10°C / min, holding for 10 min, and finally cooling down at 10°C / min for 90 min until the furnace cools down.

[0012] Step 2: The metal shell and the end guide pin obtained in Step 1 are brazed to the ceramic sheet using Ag-Cu-Ti active brazing filler metal. During the brazing process, the temperature is first increased from room temperature to 550°C at 10°C / min, then held for 20 min, then increased to 720°C at 10°C / min, held for 20 min, then increased to 850°C at 10°C / min, held for 10 min, and finally decreased to 300°C at 5°C / min, and then cooled in the furnace.

[0013] In the method for manufacturing the connector ceramic package assembly as described above, the solder used for brazing is AgCuTi / Cu / BNi-2.

[0014] In the method for fabricating the connector ceramic package assembly as described above, the thickness ratio of the AgCuTi, Cu, and BNi-2 layers in the solder is 1:2:1.

[0015] In the method for manufacturing the connector ceramic package assembly as described above, after brazing, the connector ceramic package assembly is subjected to helium mass spectrometry leak detection to ensure that the hermeticity of the connector ceramic package assembly is better than 1E-9 Pa·m. 3 / min.

[0016] This invention proposes a plug-in electrical penetration component, comprising a cylindrical body, a connecting pin, and two plug-in ceramic encapsulation assemblies as described above. The cylindrical body has an axially penetrating connecting cavity. The two plug-in ceramic encapsulation assemblies are respectively disposed at both ends of the cylindrical body. One end of each plug-in ceramic encapsulation assembly with a ceramic sheet is inserted into the connecting cavity, and the outer wall of the metal shell of each plug-in ceramic encapsulation assembly is sealed to the inner wall of the cylindrical body. The connecting pin is axially disposed within the connecting cavity, and both ends of the connecting pin are respectively connected to the end pins of the two plug-in ceramic encapsulation assemblies.

[0017] As described above, in the electrical penetration connector, the cylindrical body is a metal cylindrical body, and the outer wall of the metal outer shell is sealed to the inner wall of the cylindrical body by welding.

[0018] In the above-described electrical penetration connector, the two ends of the connecting guide pin are respectively connected to the corresponding end guide pin via a third crown spring.

[0019] The plug-in electrical penetration component as described above further includes two disk assemblies, which are respectively aligned and connected to the two plug-in ceramic encapsulation assemblies.

[0020] As described above, in the plug-in electrical penetration component, the disc assembly includes a first disc, a second disc, a connector, and at least one connector guide pin. The connector is cylindrical and has an axially penetrating connector cavity. The first disc and the second disc are respectively disposed at both ends of the connector cavity. The first disc contains at least one first crown spring that axially penetrates the first disc. The second disc contains at least one second crown spring that axially penetrates the second disc. The connector guide pin is arranged axially along the connector cavity, and both ends of the connector guide pin are respectively connected to the first crown spring and the second crown spring. The connector, with the second disc mounted at one end, is inserted into the other end of the mounting cavity of the plug-in ceramic encapsulation assembly. The end guide pin is connected to the second crown spring.

[0021] As described above, in the electrical connection through-hole component, the connector is fitted with a fastening nut, which is threadedly connected to the cylinder and fixes the connector to the cylinder.

[0022] As described above, in the electrical penetration connector, the second disk is disposed close to the ceramic plate and is sealed to the ceramic plate.

[0023] As described above, the electrical penetration component has a connecting pipe for leak detection on the outer wall of the cylinder.

[0024] The present invention also proposes a method for manufacturing a plug-in electrical penetration component. The method involves manufacturing the plug-in electrical penetration component as described above, wherein one of the plug-in ceramic encapsulation components is sealed and fixedly connected to one end of the cylindrical body; the airtightness between the plug-in ceramic encapsulation component and the cylindrical body is measured; the connecting guide pin is placed into the connecting cavity and connected to the end guide pin; then the end guide pin of another plug-in ceramic encapsulation component is connected to the other end of the connecting guide pin; the other plug-in ceramic encapsulation component is sealed and fixedly connected to the other end of the cylindrical body; and the airtightness between the other plug-in ceramic encapsulation component and the cylindrical body is measured.

[0025] In the above-described method for manufacturing the electrical penetration component, each of the aforementioned electrical penetration components is fixedly connected to the cylindrical body by argon arc welding.

[0026] In the method for manufacturing the electrical penetration component as described above, the airtightness must be better than 1E-9 Pa·m. 3 / min.

[0027] Compared with the prior art, the present invention has the following features and advantages:

[0028] The plug-in ceramic encapsulation assembly proposed in this invention is used for sealing electrical penetrations. The ceramic sheet has good insulation and sealing effects even at high temperatures, and can exhibit stable insulation and sealing performance under long-term service conditions. It features high temperature resistance and high reliability.

[0029] The method for manufacturing the plug-in ceramic packaging assembly proposed in this invention only requires welding between the ceramic sheet and the end guide pin, and between the ceramic sheet and the metal shell during the brazing process, thus reducing the factors affecting the welding effect; different components are brazed separately, which improves the success rate of brazing.

[0030] The plug-in electrical penetration component proposed in this invention uses plug-in ceramic encapsulation components at both ends of the cylindrical body. By simply connecting the metal shell of the plug-in ceramic encapsulation component to the cylindrical body, the cylindrical body can be sealed and insulated, which greatly improves the assembly efficiency of the plug-in electrical penetration component.

[0031] The method for manufacturing the plug-in electrical penetration component proposed in this invention connects the metal shell and the cylinder of the plug-in ceramic encapsulation component and tests the airtightness, thereby achieving sealing and insulation of the cylinder, greatly improving the assembly efficiency of the plug-in electrical penetration component and reducing production costs. Attached Figure Description

[0032] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0033] Figure 1 This is a schematic diagram of the structure of the plug-in ceramic packaging assembly proposed in this invention;

[0034] Figure 2 This is a diagram showing the structural distribution of the end guide pin on the ceramic sheet in this invention.

[0035] Figure 3 A schematic diagram of the structure of the electrical penetration component proposed in the invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Connector ceramic package assembly; 10. Ceramic sheet;

[0038] 20. Metal casing; 21. Mounting cavity;

[0039] 30. End guide pin; 40. Weld seam;

[0040] 100', Plug-in ceramic package assembly;

[0041] 10' Ceramic plate; 20' Metal casing;

[0042] 30', End guide pin; 200, Electrical connector;

[0043] 210. Cylinder body; 211. Connecting cavity;

[0044] 220. Connecting guide pin; 230. Third crown spring;

[0045] 240. Disk assembly; 241. First disk;

[0046] 242. Second disc; 243. Connector;

[0047] 244. Connecting guide pin; 245. First crown spring;

[0048] 246. Second crown spring; 247. Fastening nut;

[0049] 240', Disk assembly; 241', First disk;

[0050] 242', Second disc; 243', Connector;

[0051] 244', Connecting guide pin; 245', First crown spring;

[0052] 246', Second crown spring; 247', Fastening nut;

[0053] 230', Third crown spring; 250, Connecting tube;

[0054] 260. Wire. Detailed Implementation

[0055] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention.

[0056] like Figure 1 , Figure 2 As shown, the present invention proposes a plug-in ceramic encapsulation assembly 100, which includes a ceramic sheet 10, a metal housing 20 and at least one end guide pin 30. The metal housing 20 is cylindrical and has an axially penetrating mounting cavity 21. The ceramic sheet 10 covers one end of the mounting cavity 21 and closes the end. The end guide pin 30 is disposed through the ceramic sheet 10. The ceramic sheet 10 and the metal housing 20 are sealed together, and the ceramic sheet 10 and the end guide pin 30 are sealed together.

[0057] The ceramic encapsulation assembly 100 proposed in this invention is used for sealing the electrical penetration part 200. The ceramic sheet 10 has good insulation and sealing effects even at high temperatures, and can exhibit stable insulation and sealing performance under long-term service conditions. It is not only resistant to high temperatures but also has high reliability.

[0058] The plug-in ceramic encapsulation assembly 100 proposed in this invention can be manufactured independently. Specifically, the ceramic sheet 10, metal casing 20, and end guide pins 30 are first sealed and connected as a single unit to form the plug-in ceramic encapsulation assembly 100. Then, the plug-in electrical penetration component 200 is sealed using the plug-in ceramic encapsulation assembly 100. In this way, the connection between the ceramic sheet 10 and the metal casing 20, and the connection between the metal casing 20 and the cylindrical body 210 of the plug-in electrical penetration component 200, are achieved through two assembly steps. This avoids waste of related components such as the cylindrical body 210 of the plug-in electrical penetration component 200 due to connection failure between the ceramic sheet 10 and the metal casing 20, thus saving costs. Furthermore, since the connection process of each component is achieved through different steps, the influencing factors of each connection process are greatly reduced, which helps to improve the success rate of each connection process.

[0059] The present invention also proposes a method for manufacturing the aforementioned plug-in ceramic encapsulation assembly 100, wherein the ceramic sheet 10, the end guide pin 30, and the metal shell 20 are connected by active metal brazing to form the plug-in ceramic encapsulation assembly 100. The active metal brazing method eliminates the need for the cumbersome metallization process of the ceramic sheet and only requires one sintering during the welding process, thereby improving welding efficiency and reducing costs.

[0060] The method for manufacturing the plug-in ceramic encapsulation assembly 100 proposed in this invention only requires welding between the ceramic sheet 10 and the end guide pin 30, and between the ceramic sheet 10 and the metal shell 20 during the brazing process. This reduces the number of factors affecting the welding effect and improves the success rate of brazing.

[0061] In an optional embodiment of the present invention, the solder used in the active metal brazing method is AgCuTi / Cu / BNi-2 solder.

[0062] In one optional example of this embodiment, AgCuTi, Cu, and BNi-2 are compounded in a 1:2:1 ratio (thickness). Using this ratio, after welding, the continuous Cu layer of suitable thickness in the weld 40 formed by the solder can prevent Ti from diffusing into the weld, avoiding the formation of brittle intermetallic compounds; simultaneously, the suitable thickness of the soft Cu layer has little impact on the overall strength, thus exhibiting high shear strength (approximately 100 MPa).

[0063] Preferably, in the solder, AgCuTi has a thickness of 50 μm, Cu has a thickness of 100 μm, and BNi-2 has a thickness of 50 μm.

[0064] In an optional embodiment of the present invention, the brazing is performed in two steps. In the first step (i.e., step 1), the metal shell and the end guide pin are brazed together with the Cu foil using BNi-2 brazing filler metal. The process is as follows: first, the temperature is increased from room temperature to 300°C at 10°C / min, then held for 10 min, then increased to 500°C at 10°C / min, held for 10 min, then increased to 900°C at 10°C / min, held for 10 min, then increased to 1030°C at 10°C / min, held for 10 min, and finally cooled down at 10°C / min for 90 min until the furnace cools down. The second step (i.e., step 2) involves brazing the metal shell and end guide pin obtained in the first step to the ceramic sheet using Ag-Cu-Ti active brazing filler metal. During the brazing process, the temperature is first increased from room temperature to 550°C at 10°C / min, then held for 20 min, then increased to 720°C at 10°C / min, held for 20 min, then increased to 850°C at 10°C / min, held for 10 min, and finally decreased to 300°C at 5°C / min, and then cooled in the furnace.

[0065] In an optional embodiment of the present invention, after brazing is completed, the mating ceramic packaging assembly 100 needs to be leak-tested using a helium mass spectrometer to ensure that the hermeticity of the mating ceramic packaging assembly 100 is better than 1E-9 Pa·m. 3 / min.

[0066] In an optional embodiment of the present invention, the plug-in ceramic encapsulation assembly 100 includes a plurality of parallel spaced end guide pins 30, each end guide pin 30 axially penetrating the ceramic sheet 10.

[0067] In an optional embodiment of the present invention, the ceramic sheet 10 is made of 95%-99% alumina ceramic, preferably 99% alumina ceramic.

[0068] The present invention also proposes a plug-in electrical penetration member 200, which includes a cylindrical body 210, at least one connecting guide pin 220, and two plug-in ceramic encapsulation assemblies 100 as described above. The cylindrical body 210 has an axially penetrating connecting cavity 211. The two plug-in ceramic encapsulation assemblies 100 are respectively disposed at both ends of the cylindrical body 210. One end of the ceramic sheet 10 of each plug-in ceramic encapsulation assembly 10 is inserted into the connecting cavity 211, and the outer wall of the metal shell 20 of each plug-in ceramic encapsulation assembly 100 is sealed to the inner wall of the cylindrical body 210. The connecting guide pin 220 is axially disposed in the connecting cavity 211, and both ends of the connecting guide pin 220 are respectively connected to the end guide pins 30 of the two plug-in ceramic encapsulation assemblies 100.

[0069] like Figure 3As shown, the plug-in electrical penetration component 200 proposed in this invention has its two ends of the cylindrical body 210 connected to the plug-in ceramic encapsulation assembly 100. By simply connecting the metal shell 20 of the plug-in ceramic encapsulation assembly 100 to the cylindrical body 210, the cylindrical body 210 can be sealed and insulated, which greatly improves the assembly efficiency of the plug-in electrical penetration component 200 and reduces the cost.

[0070] The present invention also proposes a method for manufacturing a plug-in electrical penetration component 200, wherein a plug-in ceramic encapsulation component 100 is sealed and fixedly connected to one end of a cylindrical body 210, the airtightness between the plug-in ceramic encapsulation component 100 and the cylindrical body 210 is tested, a connecting guide pin 220 is placed into a connecting cavity 211 and connected to an end guide pin 30, and then the end guide pin 30' of another plug-in ceramic encapsulation component 100' is connected to the other end of the connecting guide pin 220, the other plug-in ceramic encapsulation component 100' is sealed and fixedly connected to the other end of the cylindrical body 210, and the airtightness between the other plug-in ceramic encapsulation component 100' and the cylindrical body 210 is tested.

[0071] The method for manufacturing the electrical penetration component 200 proposed in this invention connects the metal shell 20 and the cylindrical body 210 of the ceramic encapsulation assembly 100 and tests their airtightness, thereby achieving sealing and insulation of the cylindrical body 210, which greatly improves the assembly efficiency of the electrical penetration component 200 and reduces costs.

[0072] In an optional embodiment of the present invention, the outer wall of the metal shell 20 and the inner wall of the cylinder 210 are connected by welding to form a sealed connection.

[0073] Preferably, the welding method between the metal shell 20 and the cylinder 210 is argon arc welding.

[0074] In an optional embodiment of the present invention, the airtightness between the plug-in ceramic encapsulation assembly 100 and the cylinder 210, and the airtightness between the other plug-in ceramic encapsulation assembly 100' and the cylinder 210, must both be better than 1E-9 Pa·m. 3 / min, meaning the airtightness of the entire electrical penetration component 200 must be better than 1E-9 Pa·m. 3 / min.

[0075] In an optional embodiment of the present invention, the two ends of the connecting guide pin 220 are respectively connected to the corresponding end guide pins 30 and 30' via the third crown spring 230.

[0076] In an optional example of this embodiment, the plug-in ceramic package assembly 100 has a plurality of end guide pins 30 (the plug-in ceramic package assembly 100' also has a plurality of end guide pins 30'), and the cylindrical body 210 is provided with a plurality of connecting guide pins 220.

[0077] In an optional embodiment of the invention, the plug-in electrical penetration member 200 further includes two disk assemblies 240, with each plug-in ceramic encapsulation assembly 100 connected to one disk assembly 240. The disk assembly 240 is used for further securing the plug-in ceramic encapsulation assembly 100 and for transmitting signals or electrical energy between the disk assembly 240 and the end pins 30 of the plug-in ceramic encapsulation assembly 100.

[0078] In an optional example of this embodiment, the disc assembly 240 includes a first disc 241, a second disc 242, a connector 243, and at least one connector guide pin 244. The connector 243 is cylindrical and has an axially penetrating connector cavity. The first disc 241 and the second disc 242 are respectively disposed at both ends of the connector cavity. The first disc 241 is provided with at least one first crown spring 245, which axially penetrates the first disc 241. The second disc 242 is provided with at least one second crown spring 246, which axially penetrates the second disc 242. The connector guide pin 244 is arranged along the axial direction of the connector cavity, and both ends of the connector guide pin 244 are respectively connected to the first crown spring 245 and the second crown spring 246. The end of the connector 243, on which the second disc 242 is mounted, is inserted into the other end of the mounting cavity 21 of the connector ceramic encapsulation assembly 100, and the end guide pin 30 is connected to the second crown spring 246. Using the above structure, signals or electrical energy are transmitted to the end guide pin 30 via the first crown spring 245, the insertion guide pin 244, and the second crown spring 246. Furthermore, the disc assembly 240 and the insertion ceramic encapsulation assembly 100, as well as the second crown spring 246 and the end guide pin 30, are all insertion structures, enabling the insertion electrical penetration member 200 to be inserted and removed multiple times while remaining sealed.

[0079] In an optional example, the end guide pin 30 is bonded to the second crown spring 246, the second crown spring 246 to the insertion guide pin 244, the first crown spring 245 to the first disk 241, the insertion guide pin 244 to the second crown spring 246, and the second crown spring 246 to the second disk 242 by high-temperature adhesive.

[0080] In an optional example, the first crown spring 245 is also connected to an external wire 260.

[0081] Preferably, the first crown spring 245 and the wire 260 are connected by solder.

[0082] In an optional embodiment of the present invention, a fastening nut 247 is fitted over the connector 243. The fastening nut 247 is threadedly connected to the cylinder 210 and fixes the connector 243 to the cylinder 210, thereby achieving a fixed connection between the disc assembly 240 and the cylinder 210.

[0083] In one optional embodiment, the outer wall of the connector 243 is provided with a boss, and the inner wall of one end of the fastening nut 247 is provided with a shoulder, and the shoulder of the fastening nut 247 abuts against the boss of the connector 243.

[0084] In an optional embodiment of the present invention, the second disk 242 is disposed close to the ceramic sheet 10 and fixedly connected to the ceramic sheet 10.

[0085] In an optional example of this implementation, the second disk 242 and the ceramic sheet 10 are bonded together with a high-temperature adhesive.

[0086] In an optional embodiment of the present invention, a connecting pipe 250 for helium leak detection is provided on the outer wall of the cylinder 210.

[0087] In an optional embodiment of the present invention, the cylinder 210 is a metal cylinder, and the metal cylinder 210 is welded to the metal shell 20 of the ceramic encapsulation assembly 100 by argon arc welding.

[0088] In an optional embodiment of the invention, the airtightness of the electrical penetration component is better than 1E-9 Pa·m. 3 The operating speed is 1000 m / min, and the working temperature can reach over 400℃.

[0089] In an optional embodiment of the present invention, the end guide pin 30 and the connecting guide pin 220 are connected by a third crown spring 230, and the end guide pin 30 and the third crown spring 230, and the connecting guide pin 220 and the third crown spring 230 are respectively bonded by high temperature adhesive.

[0090] Please refer to Figures 1 to 3 The following describes in detail the specific implementation process of the plug-in ceramic encapsulation assembly, electrical penetration component, and manufacturing method of the present invention, with reference to an embodiment:

[0091] 1. Fabricate plug-in ceramic encapsulation components 100 and 100', ceramic sheet 10, several sets of end guide pins 30, and metal shell 20, and braze them using the active metal method to form plug-in ceramic encapsulation components 100 and 10'.

[0092] The active metal brazing process is carried out in two steps. In the first step, the metal shell and the end guide pin are brazed together with Cu foil using BNi-2 brazing filler metal. The process flow is as follows: first, the temperature is increased from room temperature to 300℃ at 10℃ / min, then held for 10 min, then increased to 500℃ at 10℃ / min, held for 10 min, then increased to 900℃ at 10℃ / min, held for 10 min, then increased to 1030℃ at 10℃ / min, held for 10 min, and finally decreased at 10℃ / min for 90 min until it is cooled in the furnace. The second step involves brazing the metal shell and end guide pins obtained in the first step to the ceramic sheet using Ag-Cu-Ti active brazing filler metal. During the brazing process, the temperature is first increased from room temperature to 550℃ at 10℃ / min, then held for 20 minutes, then increased to 720℃ at 10℃ / min, held for another 20 minutes, then increased to 850℃ at 10℃ / min, held for another 10 minutes, and finally decreased to 300℃ at 5℃ / min, and then cooled in the furnace.

[0093] The solder used in the above active metal welding method is AgCuTi / Cu / BNi-2, and the specific content of the solder is as follows: AgCuTi (50μm) / Cu (100μm) / BNi-2 (50μm);

[0094] 2. Perform helium mass spectrometry leak testing on the mating ceramic encapsulation components 100 and 100' to ensure an airtightness better than 1E-9 Pa·m. 3 / min;

[0095] 3. The connecting pipe 250 is welded to the cylinder 210 by argon arc welding;

[0096] 4. Conduct a comprehensive leak test on the entire assembly consisting of the connecting pipe and the cylinder 210 to ensure airtightness better than 1E-9 Pa·m. 3 / min;

[0097] 5. The ceramic encapsulation component 100 is welded to the cylinder 210 using argon arc welding. A second overall leak test is then performed to ensure an airtightness better than 1E-9 Pa·m. 3 / min;

[0098] 6. The end guide pin 20 in the ceramic encapsulation assembly 100 is bonded to the third crown spring 230, the third crown spring 230 is bonded to the connecting guide pin 220, and the connecting guide pin is bonded to the third crown spring 230' using high-temperature adhesive.

[0099] 7. The third crown spring 230' is bonded to the end guide pin 30 in the ceramic encapsulation assembly 100' using high-temperature adhesive;

[0100] 8. The ceramic encapsulation component 100' is welded to the cylinder 210 using argon arc welding. A second overall leak test is then performed on the equipment to ensure an airtightness better than 1E-9 Pa·m. 3 / min;

[0101] 9. Using the end guide pin 30 of the ceramic encapsulation assembly 100 as the positioning reference, the second crown spring 246 is bonded to the guide pin 244, the second crown spring 246 is bonded to the ceramic sheet 10, the second crown spring 246 is bonded to the second disk 242, and the second disk 242 is bonded to the ceramic sheet 10 using high-temperature adhesive; using the end guide pin 30' of the ceramic encapsulation assembly 100' as the positioning reference, the second crown spring 246' is bonded to the guide pin 244', the second crown spring 246' is bonded to the ceramic sheet 10', the second crown spring 246' is bonded to the second disk 242', and the second disk 242' is bonded to the ceramic sheet 10' using high-temperature adhesive.

[0102] 10. Glue the first disc 241 to the connector 243, the first disc 241 to the first crown spring 245, the first crown spring 245 to the connector guide pin 244, and the first disc 241 to the connector guide pin 244 using high-temperature adhesive; glue the second disc 242' to the connector 243', the second disc 242' to the second crown spring 246', the second crown spring 246' to the connector guide pin 244', and the first disc 241' to the connector guide pin 244' using high-temperature adhesive;

[0103] 11. The cylinder 210 is welded to the simulated pressure vessel equipment to be tested using argon arc welding;

[0104] 12. Insert the fastening nut 247 into the connector 243, and the fastening nut 247' into the connector 243'. Solder the wires at both ends to the first crown springs 245 and 245' respectively.

[0105] 13. Using the guides on the second discs 242 and 242', insert the connectors 243 and 243' into both ends of the cylinder 210 respectively, and secure them with fastening nuts 247 and 247'.

[0106] The detailed explanations of the above embodiments are intended solely to illustrate the present invention and facilitate a better understanding of it. However, these descriptions should not be construed as limiting the invention in any way. In particular, the various features described in different embodiments can be arbitrarily combined to form other embodiments. Unless explicitly stated otherwise, these features should be understood as applicable to any embodiment, and not limited to those described.

Claims

1. A plug-in ceramic encapsulation assembly, characterized in that, The connector ceramic packaging assembly includes a ceramic sheet, a metal housing, and at least one end guide pin. The metal housing is cylindrical and has an axially through mounting cavity. The ceramic sheet covers one end of the metal housing and closes the end. The end guide pin passes through the ceramic sheet. The ceramic sheet and the metal housing, as well as the ceramic sheet and the end guide pin, are sealed connections. The sealed connection is achieved by a weld formed by brazing with solder. The solder is a composite solder of AgCuTi, Cu, and BNi-2 in a thickness ratio of 1:2:

1. After the soldering is completed, BNi-2 is welded to the metal housing or the end guide pin, AgCuTi is welded to the ceramic sheet, and both BNi-2 and AgCuTi are welded to Cu, forming a continuous Cu layer between BNi-2 and AgCuTi.

2. The connector ceramic encapsulation assembly as described in claim 1, characterized in that, The ceramic sheet is welded to the metal shell, and the ceramic sheet is welded to the end guide pin using an active metal method.

3. The connector ceramic encapsulation assembly as described in claim 1, characterized in that, The connector ceramic encapsulation assembly includes multiple parallel and spaced end guide pins, each of which passes through the ceramic sheet along the axial direction of the mounting cavity.

4. The connector ceramic encapsulation assembly as described in claim 1, characterized in that, The alumina content in the ceramic sheet ranges from 95% to 99%.

5. A method for manufacturing a plug-in ceramic package assembly, comprising manufacturing a plug-in ceramic package assembly as described in any one of claims 1 to 4, characterized in that, The ceramic sheet, the end guide pin, and the metal shell are brazed together using an active metal method to form the plug-in ceramic encapsulation assembly.

6. The method for manufacturing the connector ceramic encapsulation assembly as described in claim 5, characterized in that, The brazing includes: Step 1: The metal shell and the end guide pin are brazed together with Cu foil using BNi-2 brazing filler metal. The process involves first heating from room temperature to 300°C at 10°C / min, holding for 10 min, then heating to 500°C at 10°C / min, holding for 10 min, then heating to 900°C at 10°C / min, holding for 10 min, then heating to 1030°C at 10°C / min, holding for 10 min, and finally cooling down at 10°C / min for 90 min until the furnace cools down. Step 2: The metal shell and the end guide pin obtained in Step 1 are brazed to the ceramic sheet using Ag-Cu-Ti active brazing filler metal. The process involves first heating from room temperature to 550°C at 10°C / min, then holding at that temperature for 20 min, then heating to 720°C at 10°C / min, holding at that temperature for another 20 min, then heating to 850°C at 10°C / min, holding at that temperature for another 10 min, and finally cooling to 300°C at 5°C / min, followed by furnace cooling.

7. The method for manufacturing the connector ceramic encapsulation assembly as described in claim 5, characterized in that, The solder used for the brazing is AgCuTi / Cu / BNi-2.

8. The method for manufacturing the connector ceramic encapsulation assembly as described in claim 7, characterized in that, The thickness ratio of AgCuTi, Cu, and BNi-2 layers in the solder is 1:2:

1.

9. The method for manufacturing the connector ceramic encapsulation assembly as described in claim 5, characterized in that, After brazing, the connector ceramic package assembly is subjected to helium mass spectrometry leak testing to ensure that the hermeticity of the connector ceramic package assembly is better than 1E-9 Pa·m. 3 / min.

10. A plug-in electrical penetration component, characterized in that, The plug-in electrical penetration component includes a cylindrical body, a connecting pin, and two plug-in ceramic encapsulation assemblies as described in any one of claims 1 to 4. The cylindrical body has an axially penetrating connecting cavity. The two plug-in ceramic encapsulation assemblies are respectively disposed at both ends of the cylindrical body. One end of each plug-in ceramic encapsulation assembly with a ceramic sheet is inserted into the connecting cavity, and the outer wall of the metal shell of each plug-in ceramic encapsulation assembly is sealed to the inner wall of the cylindrical body. The connecting pin is axially disposed in the connecting cavity, and both ends of the connecting pin are respectively connected to the end pins of the two plug-in ceramic encapsulation assemblies.

11. The electrical penetration member as described in claim 10, characterized in that, The cylinder is a metal cylinder, and the outer wall of the metal outer shell is connected to the inner wall of the cylinder by welding.

12. The electrical penetration member as described in claim 10, characterized in that, The two ends of the connecting guide pin are respectively connected to the corresponding end guide pins via a third crown spring.

13. The electrical penetration member as described in claim 10, characterized in that, The connector electrical penetration component also includes two disk assemblies, which are respectively aligned and connected to the two connector ceramic encapsulation assemblies.

14. The electrical penetration member as described in claim 13, characterized in that, The disc assembly includes a first disc, a second disc, a connector, and at least one connector guide pin. The connector is cylindrical and has an axially penetrating connector cavity. The first disc and the second disc are respectively disposed at both ends of the connector cavity. The first disc contains at least one first crown spring that axially penetrates the first disc. The second disc contains at least one second crown spring that axially penetrates the second disc. The connector guide pin is arranged axially along the connector cavity, and its two ends are respectively connected to the first crown spring and the second crown spring. The connector, with the second disc mounted at one end, is inserted into the other end of the mounting cavity of the connector ceramic encapsulation assembly. The end guide pin is connected to the second crown spring.

15. The electrical penetration member as described in claim 14, characterized in that, The connector is fitted with a fastening nut, which is threaded to the cylinder and fixes the connector to the cylinder.

16. The electrical penetration member as described in claim 14, characterized in that, The second disk is positioned close to the ceramic sheet and is sealed to the ceramic sheet.

17. The electrical penetration member as described in claim 10, characterized in that, The outer wall of the cylinder is provided with a connecting pipe for helium leak detection.

18. A method for manufacturing a plug-in electrical penetration member, comprising manufacturing a plug-in electrical penetration member as described in any one of claims 10 to 17, characterized in that, One of the aforementioned plug-in ceramic encapsulation components is sealed and fixedly connected to one end of the cylinder. The airtightness between the plug-in ceramic encapsulation component and the cylinder is measured. The connecting guide pin is placed into the connecting cavity and connected to the end guide pin. Then, the end guide pin of another plug-in ceramic encapsulation component is connected to the other end of the connecting guide pin. The other plug-in ceramic encapsulation component is sealed and fixedly connected to the other end of the cylinder. The airtightness between the other plug-in ceramic encapsulation component and the cylinder is measured.

19. The method for manufacturing a plug-in electrical penetration member as described in claim 18, characterized in that, Each of the aforementioned plug-in ceramic encapsulation components is fixedly connected to the cylinder body by argon arc welding.

20. The method for manufacturing a plug-in electrical penetration member as described in claim 18, characterized in that, The airtightness needs to be better than 1E-9 Pa·m. 3 The operating speed is 1000 m / min, and the working temperature can reach over 400℃.

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