Fixed-gap containing cavity device and high-pressure homogenizer

The utility model discloses a fixed clearance containing cavity device and a high pressure homogenizer, the containing cavity device comprises a valve body and a valve core, the valve body is provided with a feeding channel and a discharging channel, the valve core comprises a first core body and a second core body, and the first core body comprises a main body part, a first matching part and a second matching part; the second core body is provided with a first matching cavity, a second matching cavity and a collision cavity which are sequentially communicated from top to bottom, the first core body is partially inserted into the second core body, and at least part of the first matching part is inserted into the first matching cavity in a close fit mode; a frustum-shaped cavity gap is formed between the second matching part and the inner wall of the second matching cavity from top to bottom, and a collision area is formed between the second matching part and the inner wall of the collision cavity. By integral