The application discloses a cavity sealing device suitable for inductive heating in a
closed cavity, which comprises a
ceramic substrate, the
ceramic substrate is sealingly connected with the
closed cavity, a first
pipe and a second
pipe are respectively arranged on the left side and the right side of the
ceramic substrate, a gap is formed between the two pipes and the
ceramic substrate to form a cavity, and the first
pipe and the second pipe are respectively provided with a first sealing ring, a second sealing ring and a third sealing ring, the end of the first pipe is provided with an elastic structure which is in contact with the second pipe, the first pipe and the second pipe are further connected with a
fastener, and the first pipe and the second pipe are both split conical structures which are hollow and communicated, the inner
diameter of the second pipe is matched with the outer
diameter of the first pipe; during operation, the conical structure is pressed to compress the edge sealing
gasket to strengthen the sealing through the
pressure difference between the inside and the outside of the
closed cavity, the closed cavity can adapt to the case that the pressure in the cavity is less than or greater than the
atmospheric pressure outside, the
current conduction is ensured, the circumferential sealing ring ensures the flow of cooling water in the pipeline, the
ceramic substrate is made of non-conductive ceramic material and can realize overall sealing, and the problem that the existing sealing device can only be used in a single pressure field is effectively solved.