2results about How to "Prevent suck back" patented technology

The present invention belongs to the technical field of collodion mops, and particularly refers to a collodion mop, comprising a mop rod, a mop head movably provided at the end of the mop rod, a cotton head provided on the mop head, a water squeezing rack sleeved on the mop rod, the water squeezing rack being movable along the mop rod, the mop head being rotatable until the length direction of the cotton head is substantially parallel to the mop rod and aligned with the water squeezing rack, the cotton head being movably provided on the mop head and the cotton head / part of the cotton head being lateral-movable in the mop head; when squeezing water, the water squeezing rack slides down along the length direction of the cotton head and squeezes the cotton head to realize the squeezing or releasing of the cotton head in the mop head along the length direction of the cotton head, and the cotton head is completely separated from the water squeezing device when mopping the floor. The present invention provides a collodion mop which has a simple and stable structure, can clean the surface of the cotton head, and has a good water squeezing effect.

This utility model discloses an adjustable negative pressure boiler slag sampling device. A plug is installed at the open end of an elliptical cross-section sampling container, which is eccentrically connected to the container via an eccentric rotating shaft. The elliptical cross-section sampling container is fixedly connected to a pull ring handle unit via a spoon handle. The pull ring handle unit includes an opening and closing linkage mechanism and a limit adjustment mechanism. The opening and closing linkage mechanism includes a pull ring, a connecting shaft, and a return spring. The connecting shaft is installed inside the hollow spoon handle, with one end connected to the pull ring and the other end connected to the eccentric rotating shaft. The return spring is sleeved on one end of the connecting shaft, which has a raised guide shaft. The limit adjustment mechanism is located at one end of the spoon handle and has an oblique spiral guide groove. The raised guide shaft is slidably installed within the spiral guide groove. This utility model features a simple and stable process, improves sampling efficiency, and is adaptable to different negative pressure intensities, effectively preventing slag from being sucked back under negative pressure.