Threaded expansion cover

[0011] The reference signs in the drawings of the specification include: expansion sleeve body 1, opening and closing nut 2, upper expansion joint 3, lower expansion joint 4, valve stem 5, and push rod 6.

[0012] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0013] according to figure 1 As shown, the threaded expansion sleeve in the embodiment of the present invention includes an expansion sleeve body 1, an outer thread is provided on the outer wall of the expansion sleeve body 1, and an inner thread (not shown in the figure) is provided on the inner wall of the expansion sleeve body 1, When in use, according to the specific models of the valve stem 5 and the actuator stem 6, the threaded expansion sleeve can be connected to the valve stem 5 or the push rod 6. In this embodiment, the internal thread of the threaded expansion sleeve and the valve stem 5 are preferably connected. External thread connection,