Combined micro-pressure sleeve

The utility model relates to the technical field of micro-pressure devices, in particular to a combined micro-pressure sleeve which comprises a horn mouth pipe section, a first adapter pipe opening section and a second adapter pipe opening section. One end of the flared pipe section is seamlessly connected with the first adapter pipe orifice section, an external thread is arranged on the outer side of the other end of the flared pipe section, an internal thread matched with the external thread is arranged on the inner side of the second adapter pipe orifice section, openings are formed in the two sides of the second adapter pipe orifice section, hooks are arranged at the openings, a mesh is arranged between the two hooks, and a pressure ball is arranged in the flared pipe section. And a ground glass plug is annularly arranged on the first adapter pipe orifice section. In practical application, when the combined micro-pressure casing pipe is applied to a micro-pressure experiment, the air tightness of an exper