A vacuum interrupter
A vacuum interrupter and room temperature technology, which is applied to high-voltage air circuit breakers, high-voltage/high-current switches, electrical components, etc., can solve problems such as difficulty in effectively ensuring indoor airtightness, inability to guarantee arc extinguishing ability, and high welding difficulty. Achieve the effects of improved airtightness, good airtightness, and guaranteed indoor vacuum
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Embodiment 1
[0038] A vacuum interrupter, such as figure 1 , figure 2 As shown, it includes two cylindrical ceramic shells 1, the opposite ends of the two ceramic shells 1 are connected with a cover plate 2, and a middle lock ring 5 is connected between the opposite ends, and a shielding cover 6 is welded inside the middle lock ring 5. . The arc extinguishing chamber also includes structures such as a moving conductive rod, a moving contact, a static conductive rod, a static contact, a bellows, a protective cover, and a guide pipe, all of which are in the prior art and will not be repeated here.
[0039] Such as figure 2 , image 3 As shown, a prefabricated metal ring 3 is fixedly connected to the outer side of the end face of the ceramic housing 1 facing the cover plate 2 , and a sealing groove 11 is provided on the inner side. The sealing groove 11 is provided with a sealing ring 4 clamped between the ceramic shell 1 and the cover plate 2, and the sealing ring 4 is made of silicone...
Embodiment 2
[0049] The difference from the first embodiment is that the parameters of the sealing process between the prefabricated metal ring 3 and the ceramic shell 1 are different.
[0050] The sealing process between the prefabricated metal ring 3 and the ceramic shell 1 is as follows:
[0051] Step 1: First, polish the surface of the ceramic shell 1 until the roughness Ra reaches 0.8, then immerse it in anhydrous acetone, ultrasonically clean it for 15 minutes, then heat it to 1400°C, bake it for 60 minutes, and finally cool it to room temperature;
[0052] Step 2: In parts by weight, 5 parts of indium powder, 70 parts of silver powder, and 32 parts of copper powder were mixed and evenly stirred, rolled and formed to obtain a solder sheet with a thickness of 0.16 mm, and then heated to 800 ° C in a vacuum furnace. Sintering for 2 hours, then cooling to room temperature, trimming and cutting to obtain a solder ring with the same size as the contact area between the prefabricated metal...
Embodiment 3
[0057] The difference from the first embodiment is that the parameters of the sealing process between the prefabricated metal ring 3 and the ceramic shell 1 are different.
[0058] The sealing process between the prefabricated metal ring 3 and the ceramic shell 1 is as follows:
[0059] Step 1: First, polish the surface of the ceramic shell 1 until the roughness Ra reaches 0.8, then immerse it in anhydrous acetone, ultrasonically clean it for 12 minutes, then heat it to 1300°C, bake it for 55 minutes, and finally cool it to room temperature;
[0060] Step 2, in parts by weight, mix 4.5 parts of indium powder, 68 parts of silver powder, and 30 parts of copper powder, mix and evenly stir, roll and form to obtain a solder sheet with a thickness of 0.14mm, and then heat it in a vacuum furnace to 780°C. Sintering for 1.5h, then cooling to room temperature, trimming and cutting to obtain a solder ring with the same size as the contact area between the prefabricated metal ring 3 and ...
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