2results about How to "Does not affect appearance quality" patented technology

This invention relates to the field of office and teaching equipment technology, and particularly to a writing board and its installation method. The writing board includes a fixed plate and a movable plate, the movable plate being combined with the fixed plate via a sliding mechanism to form the writing board. The sliding mechanism includes at least two guide rails and at least one connector, the guide rails being connected by the connector to form a split-type combinable guide rail. The two ends of the split-type combinable guide rail and the connector are fixedly installed, and the split-type combinable guide rail is located behind the fixed plate and the movable plate. The movable plate can slide along the split-type combinable guide rail. This writing board solves the logistical, handling, and installation problems caused by excessively long borders, reduces noise, has a more concise and aesthetically pleasing overall design, and improves the user experience.

The application discloses a rapid pipeline pressure sealing device and a sealing method, and is applied to an oil and gas pipeline with strip crack leakage or point leakage; a hollow cylindrical cover body is arranged on a leakage position of the oil and gas pipeline, a closed leakage cavity is formed between the middle part of the hollow cylindrical cover body and the oil and gas pipeline; the hollow cylindrical cover body is spliced by two arc cover plates, connecting edges are arranged at the abutting positions of the two arc cover plates, the abutting surfaces of the two connecting edges are sealing planes, and the two abutting connecting edges form a strip-shaped structure; end face covers are fixed at two ends of the hollow cylindrical cover body, limiting squares are arranged on the end face covers, and the strip-shaped structure is arranged in the limiting squares; a sealing flow channel is arranged at the joint surface of the end face cover and the hollow cylindrical cover body, and the sealing flow channel is formed by the end face cover, the hollow cylindrical cover body and the oil and gas pipeline; oil-resistant sealing glue is injected into the sealing flow channel to form a sealing structure; and a pressure relief structure is connected to one of the arc cover plates of the hollow cylindrical cover body and is communicated with the leakage cavity. The application is suitable for pipeline sealing operation of pipelines with different flatnesses and can rapidly realize sealing operation of the pipeline with strip crack leakage.