Stepless lifting manhole cover
The utility model belongs to the technical field of municipal administration, and relates to a stepless lifting manhole cover which comprises a manhole seat and a cover cap, the outer wall of the manhole seat is provided with a manhole seat external thread, the inner wall of the cover cap is provide...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model belongs to the technical field of municipal administration, and relates to a stepless lifting manhole cover which comprises a manhole seat and a cover cap, the outer wall of the manhole seat is provided with a manhole seat external thread, the inner wall of the cover cap is provided with a cover cap internal thread, the cover cap internal thread can be connected with the manhole seat external thread in a threaded fit mode, and the cover cap is provided with a movable cover plate of an inspection opening in a covering mode. A plurality of positioning pin piece inserting holes are formed in the edge of the upper bottom face of the cover cap, the well base external threads are constructed into multiple sections of discontinuous threads, the number of the positioning pin piece inserting holes is consistent with the number of the discontinuous threads on the outer wall of the well base, and the positioning pin piece inserting holes are overlapped with the circumference of the well base external t |
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