4results about How to "Guarantee a clean environment" patented technology

The application discloses a kind of convex structure 3D printing method of inner cone parts, belong to 3D printing manufacturing technical field, it includes box, the base is placed in the bottom of the box, the outer side of the base is fixedly installed with portal frame, the first motor is installed in the base side, the fan that is used with the air suction pipe is installed in the working tank, the filter plate is installed in the first fixed block buckle;Through the extension head structure design to the inner wall of inner cone part main body, extension head itself has the effect of strengthening the overall structure support strength of part, the use amount of extension head and part inner wall part support can be greatly reduced when D printing, not only reduce the support material cost, but also can reduce subsequent support piece removal process, avoid to cause damage to extension head, part inner wall when removing support, further improve part forming quality and production efficiency, especially adapt to the precise printing demand of complex convex structure such as inner cone part inner wall extension head with structural strengthening function.

This invention provides an integrated cleaning method and a multi-functional tubing string suitable for horizontal well casing. The method is performed using a multi-functional tubing string. The multi-functional tubing string includes, in sequence, a drill string or tubing, a gauge, a first debris recovery sub, a scraper, a second debris recovery sub, and a grinding shoe, drill bit, or milling tap. The scraper includes a scraper cylinder and scrapers; the scrapers do not rotate with the multi-functional tubing string. When the tubing string moves axially up and down, the scrapers rotate to clean the inner wall of the horizontal well casing. The scrapers are mounted on the scraper cylinder and include double rows of scrapers, arranged alternately in upper and lower rows. The first debris recovery sub primarily recovers metal debris settled in the upper part of the well casing, and the second debris recovery sub primarily recovers metal debris from the circulating fluid returning to the bottom of the well casing. The advantage of this invention is that it allows for cleaning operations on the casing of deep and ultra-deep wells, especially ultra-long horizontal wells, using a multi-functional tubing string.

The utility model relates to the technical field of frozen storage box, concretely is a kind of pressure equalizing device that can heat, including air inlet pipe, the surface of air inlet pipe is equipped with heating electric wire, and one end of air inlet pipe is provided with electric heating wire switch, and the surface of electric heating wire switch is fixedly connected with power cord, and the end of power cord away from electric heating wire switch is electrically connected with heating electric wire, the inner wall of air inlet pipe is fixedly connected with one-way valve, and the side of air inlet pipe is provided with switch sensor, the utility model, using the control scheme of novel electric heating pressure equalizing device, improve the accuracy, safety and convenience of electric heating, the combination of air inlet pipe and one-way valve, realize the function that can heat, improve the reliability of balance hole, so that frozen storage box can be opened and closed in short time, improve the convenience of user use.

This utility model discloses a laminar flow bed air vent curtain device, including a laminar flow bed, a bed frame, and an air intake fan. A canopy frame is fixedly connected to the side of the bed frame, and a protective canopy is movably connected to the canopy frame. An air vent blocking component is detachably installed on the air intake fan. The air vent blocking component includes a fixed base, and two pipe clamps are fixedly connected to the fixed base. A protective cover for preventing the canopy from blocking the air intake of the air intake fan is detachably installed on the pipe clamps. With the above device, when the canopy is too long or may sag due to airflow, the auxiliary pulley on the fixed base cooperates with the pressure pulley on the side of the laminar flow bed. The torsion spring inside the pressure pulley clamps and fixes the folded canopy, preventing the canopy from being attracted by the airflow of the air intake fan and blocking the protective cover. This ensures unobstructed airflow to the air intake fan, maintains stable clean airflow in the laminar flow bed, and reduces the weakening of air purification effect and the risk of patient infection caused by the canopy blocking the air intake.