A closed glass sintered connector and its process

Abstract

The present invention discloses a closed glass sintered connector and a process thereof, belonging to the technical field of connectors, and comprising a protective shell, the inner wall of the protective shell being provided with an inner conductor, the inner part of the inner conductor being provided with a glass sintered layer, the lower surface of the glass sintered layer being overlapped with the upper surface of a pad, and the lower surface of the pad being overlapped with the upper surface of a reinforced heat-insulating column. In the present invention, by providing a protective shell, an inner conductor, a pin, a fixing seat, a pad, an annular groove, a through hole and a limiting groove, the pin is provided with a through hole and a limiting groove, so that the glass liquid is immersed in the through hole and the limiting groove, and after the glass sintered layer is cooled and its shape is adapted to the shape of the through hole and the limiting groove, a plurality of supporting points are formed, so that in the process of generating thermal stress by welding, it is not easy for the inner conductor and the pin to generate a small axial displacement, the adhesion between the inner conductor and the pin is increased, and it is not easy for the loosening to occur, thereby improving the quality of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a closed glass sintered connector and a process thereof. Background Art

[0002] Glass sintered layer connectors have a much stronger seal between glass and metal than general seals, and can withstand higher temperatures and pressures. Even if they are always working in a high temperature environment, their sealing is much higher than general ones. Based on these characteristics, glass sintered layer connectors have become ideal products for use in vacuum, low temperature, high pressure, high mechanical stress and high temperature stress situations. Although the production process of connectors made of glass as insulating material is more complicated and the cost is higher, it has some characteristics that cannot be replaced by plastic sealed connectors. In the fields of marine, aviation and aerospace technology, there are many connectors with special requirements. Plastic sealing cannot meet their performance requirements, and only glass and metal sealing can meet the high precision and high reliability requirements of connectors.

[0003] Compared with plastic sealed connectors, glass frit layer connectors have the following advantages:

[0004] Better mechanical strength: When glass and metal are sealed, the glass liquid and the metal oxide layer infiltrate each other to form a mixed chemical bond. The bonding force of this chemical bond is much greater than the bonding force of plastic adhering to metal.

[0005] High temperature resistance: Glass is an inorganic non-metallic material with a high softening point temperature, and it will not release any harmful components when used in a high temperature environment. Plastic is not only not resistant to high temperatures, but also easily volatilizes harmful components in high temperature environments. This is why some connectors, especially those that need to be completely sealed at one end and used as a working interface, cannot use plastic as an insulating material.

[0006] Good sealing: The leakage rate is very low. In addition, glass has good electrical performance parameters like general insulating materials. The insulation resistance and dielectric withstand voltage of glass can fully meet the design requirements of the connector. It also has strong corrosion resistance and is suitable for harsh environments.

[0007] At present, the pins of sealed connectors are all sealed by a glass sintered layer. When glass is used for sintering sealing, the position of the alloy rod is difficult to fix and prone to errors, resulting in a large number of defective products. When the connector is subjected to high-temperature welding on a machine, thermal stress will be generated, resulting in a slight axial displacement between the conductor and the pin. If the adhesion between the glass and the conductor and the pin is insufficient during sintering, looseness may occur, seriously affecting the quality of the product. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] In order to overcome the above-mentioned defects of the prior art, the present invention provides a closed glass sintered connector and a process thereof, which solves the problem that when glass is used for sintering sealing, the position of the alloy plug rod is difficult to fix and prone to errors, which will cause a large number of defective products; when the connector is subjected to high-temperature welding on a machine, thermal stress will be generated, resulting in a slight axial displacement between the conductor and the pin. If the adhesion between the glass and the conductor and the pin is insufficient during sintering of the product, looseness may easily occur, seriously affecting the quality of the product.

[0010] (II) Technical solution

[0011] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a closed glass sintered connector, comprising a protective shell, an inner wall of the protective shell is provided with an inner conductor, a glass sintered layer is provided inside the inner conductor, the lower surface of the glass sintered layer overlaps with the upper surface of a pad, the lower surface of the pad overlaps with the upper surface of a reinforced insulation column, the lower surface of the reinforced insulation column is fixedly connected to the upper surface of a fastening assembly, the outer wall of the pad is clamped on the bottom of the inner wall of the inner conductor, and the bottom of the inner conductor is provided at the bottom of the inner wall of the protective shell.

[0012] The bottom of the fastening assembly is arranged on the lower surface of the inner wall of the protective shell, the inner wall of the inner conductor is provided with three annular grooves, six pins are clamped in the middle of the glass sintered layer, and the pins pass through the fastening assembly, the pad and the protective shell, a sealing assembly is arranged above the inner wall of the inner conductor, the lower surface of the sealing assembly overlaps the upper surface of the protective shell, the six pins are inserted in the sealing assembly, the edge of the top of the sealing assembly is connected to the upper surface of the protective shell by four fastening bolts, and the outer wall of the protective shell is provided with six fixing holes.

[0013] As a further solution of the present invention: the fastening assembly includes a fixing seat, the lower surface of the fixing seat is fixedly connected to the lower surface of the inner wall of the protective shell, the outer wall of the fixing seat is provided with an external thread, the upper surface of the fixing seat is fixedly connected to the lower surface of the reinforced insulation column, and six pins are clamped in the fixing seat.

[0014] As a further solution of the present invention: the bottom of the inner wall of the inner conductor is provided with an internal thread, and the inner wall of the inner conductor is threadedly connected to the outer wall of the fixing seat.

[0015] As a further solution of the present invention: the lower surface of the inner conductor overlaps with the upper surface of the sealing ring, the lower surface of the sealing ring overlaps with the lower surface of the inner wall of the protective shell, and the sealing ring is arranged outside the fixing seat.

[0016] As a further solution of the present invention: the outer wall of the plug pin is provided with a plurality of through holes and limiting grooves, and the limiting grooves are of columnar design.

[0017] As a further solution of the present invention: support grooves are provided on both sides of the top and bottom of the pin, two support grooves are arranged in the blocking grooves, the blocking grooves are provided on the upper surface of the blocking blocks, and the upper surfaces of the six blocking blocks are fixedly connected to the lower surface of the protective shell.

[0018] As a further solution of the present invention: the sealing assembly includes a cover plate, the lower surface of the cover plate is fixedly connected to the upper surface of the limit ring, the limit ring is clamped above the inner wall of the inner conductor, the lower surface of the cover plate is fixedly connected to the upper surface of the sealing ring, the lower surface of the sealing ring overlaps the upper surface of the protective shell, and six pins are clamped in the cover plate.

[0019] As a further solution of the present invention: the glass sintering process of the closed glass sintered connector comprises the following steps:

[0020] S1. First, prepare the raw materials of the glass sintering layer, grind and screen silica sand, sodium sulfate, dolomite and broken glass to make glass insulator materials, and the particle size of the glass insulator materials is controlled at 180-200 meshes.

[0021] S2. The glass insulator material is sent to a sintering furnace for sintering and melting, and the furnace is evacuated. Next, the glass insulator material is melted in an environment of 135-1600°C, and a mixed gas of nitrogen and oxygen is injected into the sintering furnace.

[0022] S3. The glass insulator material is in liquid state after melting and is kept at 135-1600°C for 8-15 minutes. A mixed gas of nitrogen and oxygen is continuously introduced to complete the glass sintering process and form glass liquid to be used.

[0023] S4. Electroplating nickel is performed on the inner conductor, the backing plate and the inner wall of the cover plate, and the coating thickness is 6-8μm. Then, the protective shell, inner conductor, backing plate, cover plate and pin are subjected to residual heat treatment, and the preheating temperature is controlled at 900-950℃, and the insulation time is controlled at 50-65min.

[0024] S5. Pre-oxidation treatment is then performed between the inner conductor and the pin, and the pre-oxidation treatment time is controlled at 650-700° C. and the time is controlled at 8-10 minutes.

[0025] S6. Inject the glass liquid formed in S3 into the inner conductor, keep the liquid level of the glass liquid at the edge of the top of the inner conductor, insert the cover plate into the outer wall of the pin, make the limit ring close to the inner wall of the inner conductor, use mechanical pressing to press the cover plate, and wait for the glass liquid to cool naturally.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, a protective shell, an inner conductor, a pin, a fixing seat, a pad, an annular groove, a through hole and a limiting groove are provided. After the pin is inserted into the pad, the fixing seat and the protective shell, glass liquid is placed into the inner conductor. After the glass sintered layer completes natural cooling, due to the provision of the annular groove, the shape of the glass sintered layer after cooling is matched with the shape of the annular groove and the inner wall of the conductor, forming three circles of effective fulcrum points, and the glass sintered layer is clamped inside the inner conductor. At the same time, the through hole and the limiting groove are provided on the pin, so that the glass liquid is immersed in the through hole and the limiting groove. After the glass sintered layer is cooled, its shape is matched with the shape of the through hole and the limiting groove, forming multiple supporting points, so that in the process of generating thermal stress by welding of the connector, it is not easy to generate a small axial displacement between the inner conductor and the pin, the adhesion between the inner conductor and the pin is increased, and it is not easy to loosen, thereby improving the quality of the product.

[0029] 2. In the present invention, a protective shell, a gasket, an external thread, a fixing seat, a sealing ring, a sealing ring and a cover plate are provided. After the inner conductor is inserted into the protective shell, the fixing seat is located in the middle of the inner conductor. The inner conductor is rotated to be threadedly connected with the fixing seat, and the sealing ring at the bottom of the inner conductor is in close contact with the bottom of the protective shell, which plays a limiting role while ensuring its high sealing performance. At the same time, by mechanically adding the cover plate, the sealing ring is in close contact with the protective shell, further improving its sealing performance.

[0030] 3. In the present invention, by providing a pin, a block, a stop groove, a support groove and a limit ring, after the pin passes through the protective shell and the cover plate, due to the provision of the support groove, the bottom of the pin fits with the stop groove, and the block is fixed to the protective shell, so that the stop groove effectively supports the pin, preventing the pin from sliding downward due to gravity and causing uneven pins, and the limit ring on the cover plate plays a role in limiting the pin after being clamped into the inner conductor, ensuring that it will not deviate from the position, further improving the fixing effect of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the cross section of the protective shell and the inner conductor of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the connection between the pin and the sealing assembly of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure in which the inner conductor and the fastening assembly are separated according to the present invention;

[0036] Figure 6It is a schematic diagram of the three-dimensional structure of the sealing assembly of the present invention when viewed from above;

[0037] Figure 7 It is a schematic diagram of the separation structure of the pin and the stopper of the present invention;

[0038] In the figure: 1. Protective shell; 2. Inner conductor; 3. Glass sintered layer; 4. Fastening assembly; 41. External thread; 42. Fixed seat; 5. Reinforced insulation column; 6. Pad; 7. Annular groove; 8. Pin; 9. Through hole; 10. Limiting groove; 11. Supporting groove; 12. Sealing assembly; 121. Cover plate; 122. Limiting ring; 123. Sealing ring; 13. Fastening bolt; 14. Stop block; 15. Stop groove; 16. Fixing hole; 17. Sealing ring. DETAILED DESCRIPTION

[0039] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0040] like Figure 1-7 As shown, the present invention provides a technical solution: a closed glass sintered connector, comprising a protective shell 1, an inner conductor 2 is arranged on the inner wall of the protective shell 1, a glass sintered layer 3 is arranged inside the inner conductor 2, the lower surface of the glass sintered layer 3 overlaps with the upper surface of the pad 6, the lower surface of the pad 6 overlaps with the upper surface of the reinforced insulation column 5, the lower surface of the reinforced insulation column 5 is fixedly connected with the upper surface of the fastening assembly 4, the outer wall of the pad 6 is clamped on the bottom of the inner wall of the inner conductor 2, and the bottom of the inner conductor 2 is arranged at the bottom of the inner wall of the protective shell 1.

[0041] The bottom of the fastening component 4 is arranged on the lower surface of the inner wall of the protective shell 1. The inner wall of the inner conductor 2 is provided with three annular grooves 7. The annular grooves 7 are arranged so that the shape of the glass sintered layer 3 after cooling is adapted to the shape of the annular grooves 7 and the inner wall of the conductor, forming three circles of effective fulcrums, and the glass sintered layer 3 is clamped inside the inner conductor 2, which effectively plays a role in limiting the position of the glass sintered layer 3. Six pins 8 are clamped in the middle of the glass sintered layer 3, and the pins 8 pass through the fastening component 4, the pad 6 and the protective shell 1. A sealing component 12 is arranged above the inner wall of the inner conductor 2. The sealing component The lower surface of the component 12 overlaps with the upper surface of the protective shell 1. The through hole 9 and the limiting groove 10 are provided on the pin 8, so that the glass liquid is immersed in the through hole 9 and the limiting groove 10. After the glass sintered layer 3 is cooled, its shape is adapted to the shape of the through hole 9 and the limiting groove 10 to form multiple supporting points, further improving the effect of limiting the glass sintered layer 3 and the pin 8. Six pins 8 are inserted into the sealing component 12. The edge of the top of the sealing component 12 is connected to the upper surface of the protective shell 1 by four fastening bolts 13. The outer wall of the protective shell 1 is provided with six fixing holes 16.

[0042] Specifically, Figure 2 , Figure 3 and Figure 4As shown, the fastening assembly 4 includes a fixing seat 42, the lower surface of the fixing seat 42 is fixedly connected to the lower surface of the inner wall of the protective shell 1, the outer wall of the fixing seat 42 is provided with an external thread 41, and the upper surface of the fixing seat 42 is fixedly connected to the lower surface of the reinforced thermal insulation column 5. By setting the fixing seat 42, the fixing seat 42 is located in the middle of the inner conductor 2, and the inner conductor 2 is rotated to be threadedly connected to the fixing seat 42, and the sealing ring 17 at the bottom of the inner conductor 2 is in close contact with the inner bottom of the protective shell 1, which plays a limiting role while ensuring its high sealing performance. Six pins 8 are clamped in the fixing seat 42, the bottom of the inner wall of the inner conductor 2 is provided with an internal thread, and the inner wall of the inner conductor 2 is threadedly connected to the outer wall of the fixing seat 42, the lower surface of the inner conductor 2 overlaps with the upper surface of the sealing ring 17, and the lower surface of the sealing ring 17 overlaps with the lower surface of the inner wall of the protective shell 1. The sealing ring 17 is arranged on the outside of the fixing seat 42, and the outer wall of the pin 8 is provided with a plurality of through holes 9 and limiting grooves 10, and the limiting grooves 10 are cylindrical in design.

[0043] Specifically, Figure 3 , Figure 5 and Figure 7 As shown, both sides of the top and bottom of the pin 8 are provided with support grooves 11, and the two support grooves 11 are arranged in the retaining groove 15. Through the mutual cooperation between the retaining groove 15 and the support groove 11, the bottom of the pin 8 is fitted with the retaining groove 15, and the stopper 14 is fixed to the protective shell 1, so that the retaining groove 15 effectively supports the pin 8 to prevent the pin 8 from sliding downward due to gravity, thereby causing the pin 8 to be uneven. The retaining groove 15 is provided on the upper surface of the stopper 14, and the upper surfaces of the six stoppers 14 are fixedly connected to the lower surface of the protective shell 1. The sealing assembly 12 includes a cover Plate 121, the lower surface of the cover plate 121 is fixedly connected to the upper surface of the limiting ring 122. By setting the limiting ring 122, the upper limiting ring 122 on the cover plate 121 is inserted into the inner conductor 2 to limit the pin 8, thereby ensuring that the pin 8 will not be displaced, thereby further improving the fixing effect of the pin 8. The limiting ring 122 is clamped on the upper wall of the inner conductor 2, and the lower surface of the cover plate 121 is fixedly connected to the upper surface of the sealing ring 123. The lower surface of the sealing ring 123 overlaps the upper surface of the protective shell 1, and the six pins 8 are clamped in the cover plate 121.

[0044] The glass sintering process for closed glass sintered connectors includes the following steps:

[0045] S1. First, prepare the raw materials of the glass sintering layer 3. Grind and screen silica sand, sodium sulfate, dolomite and broken glass to make glass insulator materials. The particle size of the glass insulator materials is controlled at 180-200 meshes.

[0046] S2. The glass insulator material is sent to a sintering furnace for sintering and melting, and the furnace is evacuated. Next, the glass insulator material is melted in an environment of 135-1600°C, and a mixed gas of nitrogen and oxygen is injected into the sintering furnace.

[0047] S3. The glass insulator material is in liquid state after melting and is kept at 135-1600°C for 8-15 minutes. A mixed gas of nitrogen and oxygen is continuously introduced to complete the glass sintering process and form glass liquid to be used.

[0048] S4. Electroplating the inner conductor 2, the pad 6 and the inner wall of the cover plate 121 with nickel, and the coating thickness is 6-8 μm. Then, the protective shell 1, the inner conductor 2, the pad 6, the cover plate 121 and the pin 8 are subjected to residual heat treatment, and the preheating temperature is controlled at 900-950°C, and the insulation time is controlled at 50-65 minutes.

[0049] S5. Pre-oxidation treatment is then performed between the inner conductor 2 and the pin 8, and the pre-oxidation treatment time is controlled at 650-700° C. and the time is controlled at 8-10 minutes.

[0050] S6. Inject the glass liquid formed in S3 into the inner conductor 2, keep the liquid level of the glass liquid at the edge of the top of the inner conductor 2, insert the cover plate 121 into the outer wall of the pin 8, make the limiting ring 122 close to the inner wall of the inner conductor 2, use mechanical pressing to press the cover plate 121, and wait for the glass liquid to cool naturally.

[0051] The working principle of the present invention is:

[0052] First, after the inner conductor 2 is inserted into the protective shell 1, the fixing seat 42 is located in the middle of the inner conductor 2. After the inner conductor 2 is rotated, it is threadedly connected with the fixing seat 42, and the sealing ring 17 at the bottom of the inner conductor 2 is in close contact with the bottom of the protective shell 1. After the pin 8 passes through the protective shell 1 and the cover plate 121, due to the setting of the support groove 11, the bottom of the pin 8 fits with the stop groove 15, and the stopper 14 is fixed to the protective shell 1, so that the stop groove 15 effectively supports the pin 8. Glass liquid is placed in the inner conductor 2. After the glass sintering layer 3 completes natural cooling, due to the setting of the annular groove 7, the shape of the glass sintering layer 3 after cooling is The shape of the annular groove 7 is matched with the inner wall of the conductor to form three circles of effective fulcrums, and the glass sintered layer 3 is clamped inside the inner conductor 2. At the same time, the through hole 9 and the limiting groove 10 are provided on the pin 8, so that the glass liquid is immersed in the through hole 9 and the limiting groove 10. After the glass sintered layer 3 is cooled and its shape is matched with the shape of the through hole 9 and the limiting groove 10, multiple supporting points are formed, and the cover plate 121 is inserted into the outer wall of the pin 8, so that the limiting ring 122 is close to the inner wall of the inner conductor 2. After the cover plate 121 is mechanically pressed, the glass liquid is allowed to cool naturally, and then the cover plate 121 is fixed to the protective shell 1 by four fastening bolts 13.

[0053] In summary:

[0054] By arranging the protective shell 1, the inner conductor 2, the plug pin 8, the fixing seat 42, the pad 6, the annular groove 7, the through hole 9 and the limiting groove 10, after the plug pin 8 is inserted into the pad 6, the fixing seat 42 and the protective shell 1, the glass liquid is placed into the inner conductor 2. After the glass sintered layer 3 completes natural cooling, due to the arrangement of the annular groove 7, the shape of the glass sintered layer 3 after cooling is adapted to the shape of the annular groove 7 and the inner wall of the conductor, forming three circles of effective fulcrum points, and the glass sintered layer 3 is clamped inside the inner conductor 2. At the same time, the through hole 9 and the limiting groove 10 are provided on the plug pin 8, so that the glass liquid is immersed in the through hole 9 and the limiting groove 10. After the glass sintered layer 3 is cooled, its shape is adapted to the shape of the through hole 9 and the limiting groove 10, forming multiple supporting points, so that in the process of generating thermal stress by welding, it is not easy to generate a small axial displacement between the inner conductor 2 and the plug pin 8, the adhesion between the inner conductor 2 and the plug pin 8 is increased, and it is not easy to loosen, thereby improving the quality of the product.

[0055] By arranging the protective shell 1, the pad 6, the external thread 41, the fixing seat 42, the sealing ring 17, the sealing ring 123 and the cover plate 121, after the inner conductor 2 is inserted into the protective shell 1, the fixing seat 42 is located in the middle of the inner conductor 2, and the inner conductor 2 is rotated to be threadedly connected with the fixing seat 42, and the sealing ring 17 at the bottom of the inner conductor 2 is in close contact with the inner bottom of the protective shell 1, which plays a limiting role and ensures its high sealing performance. At the same time, after the cover plate 121 is mechanically added, the sealing ring 123 is in close contact with the protective shell 1, thereby further improving its sealing performance.

[0056] By setting the pin 8, the block 14, the stop groove 15, the support groove 11 and the limiting ring 122, after the pin 8 passes through the protective shell 1 and the cover plate 121, due to the setting of the supporting groove 11, the bottom of the pin 8 fits with the stop groove 15, and the block 14 is fixed to the protective shell 1, so that the stop groove 15 effectively supports the pin 8 to prevent the pin 8 from sliding downward due to gravity, thereby causing the pin 8 to be uneven, and the limiting ring 122 on the cover plate 121 plays a role in limiting the pin 8 after being clamped into the inner conductor 2, ensuring that it will not deviate from the position, thereby further improving the fixing effect of the pin 8.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0058] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A closed glass fritted connector, comprising a protective shell (1), characterized in that: The inner wall of the protective shell (1) is provided with an inner conductor (2), the inner part of the inner conductor (2) is provided with a glass sintered layer (3), the lower surface of the glass sintered layer (3) overlaps with the upper surface of the pad (6), the lower surface of the pad (6) overlaps with the upper surface of the reinforced thermal insulation column (5), the lower surface of the reinforced thermal insulation column (5) is fixedly connected with the upper surface of the fastening component (4), the outer wall of the pad (6) is clamped on the bottom of the inner wall of the inner conductor (2), and the bottom of the inner conductor (2) is arranged at the bottom of the inner wall of the protective shell (1); The bottom of the fastening component (4) is arranged on the lower surface of the inner wall of the protective shell (1), the inner wall of the inner conductor (2) is provided with three annular grooves (7), the middle part of the glass sintered layer (3) is clamped with six pins (8), the pins (8) pass through the fastening component (4), the pad (6) and the protective shell (1), a sealing component (12) is arranged above the inner wall of the inner conductor (2), the lower surface of the sealing component (12) overlaps the upper surface of the protective shell (1), the six pins (8) are inserted into the sealing component (12), the edge of the top of the sealing component (12) is connected to the upper surface of the protective shell (1) by four fastening bolts (13), and the outer wall of the protective shell (1) is provided with six fixing holes (16); Support grooves (11) are provided on both sides of the top and bottom of the plug pin (8), and the two support grooves (11) are arranged in the blocking grooves (15). The blocking grooves (15) are provided on the upper surface of the blocking blocks (14), and the upper surfaces of the six blocking blocks (14) are fixedly connected to the lower surface of the protective shell (1).

2. A closed glass fritted connector according to claim 1, characterized in that: The fastening assembly (4) comprises a fixing seat (42), the lower surface of the fixing seat (42) is fixedly connected to the lower surface of the inner wall of the protective shell (1), the outer wall of the fixing seat (42) is provided with an external thread (41), the upper surface of the fixing seat (42) is fixedly connected to the lower surface of the reinforced insulation column (5), and six pins (8) are clamped in the fixing seat (42).

3. A closed glass fritted connector according to claim 2, characterized in that: The bottom of the inner wall of the inner conductor (2) is provided with an internal thread, and the inner wall of the inner conductor (2) is threadedly connected to the outer wall of the fixing seat (42).

4. A closed glass fritted connector according to claim 2, characterized in that: The lower surface of the inner conductor (2) overlaps with the upper surface of the sealing ring (17), the lower surface of the sealing ring (17) overlaps with the lower surface of the inner wall of the protective shell (1), and the sealing ring (17) is arranged outside the fixing seat (42).

5. The closed glass fritted connector according to claim 1, characterized in that: The outer wall of the insertion pin (8) is provided with a plurality of through holes (9) and limiting grooves (10), and the limiting grooves (10) are of columnar design.

6. The closed glass fritted connector according to claim 1, characterized in that: The sealing assembly (12) comprises a cover plate (121), the lower surface of the cover plate (121) is fixedly connected to the upper surface of a limiting ring (122), the limiting ring (122) is clamped above the inner wall of the inner conductor (2), the lower surface of the cover plate (121) is fixedly connected to the upper surface of a sealing ring (123), the lower surface of the sealing ring (123) overlaps the upper surface of the protective shell (1), and six pins (8) are clamped in the cover plate (121).

7. A closed glass fritted connector according to claim 6, characterized in that: The glass sintering process of the closed glass sintering connector comprises the following steps: S1, first prepare the raw materials of the glass sintering layer (3), grind and screen silica sand, sodium sulfate, dolomite and broken glass to make glass insulator material, and the particle size of the glass insulator material is controlled to be 180-200 mesh; S2, sending the glass insulator material into a sintering furnace for sintering and melting, evacuating the furnace, and then melting the glass insulator material in an environment of 135-1600°C, while injecting a mixed gas of nitrogen and oxygen into the sintering furnace; S3, the glass insulator material is in liquid state after melting, and is kept at 135-1600℃ for 8-15min, and a mixed gas of nitrogen and oxygen is continuously introduced, thus completing the glass sintering process and forming glass liquid for use; S4, electroplating the inner wall of the inner conductor (2), the backing plate (6) and the cover plate (121) with nickel, and the coating thickness is 6-8 μm, and then the protective shell (1), the inner conductor (2), the backing plate (6), the cover plate (121) and the plug pin (8) are subjected to residual heat treatment, and the preheating temperature is controlled at 900-950° C., and the heat preservation time is controlled at 50-65 minutes; S5, performing a pre-oxidation treatment between the inner conductor (2) and the plug pin (8), and controlling the pre-oxidation treatment time at 650-700° C. for 8-10 minutes; S6. Inject the glass liquid formed in S3 into the inner conductor (2), so that the liquid level of the glass liquid is maintained at the edge of the top of the inner conductor (2), insert the cover plate (121) into the outer wall of the pin (8), make the limiting ring (122) close to the inner wall of the inner conductor (2), use mechanical pressing to press the cover plate (121), and wait for the glass liquid to cool naturally.

Images