4results about How to "Guaranteed sealed state" patented technology

The utility model discloses a kind of hydrogen storage devices for solar hydrogen production belongs to hydrogen storage device technical field.This kind of hydrogen storage devices for solar hydrogen production, including installation component, storage component and plugging component, storage component is used to store hydrogen, plugging component is used to plugging storage component, plugging component includes communicating pipe, the side of communicating pipe is equipped with communicating plate, communicating plate is installed with communicating seat on the side away from communicating pipe, the inside of communicating seat is equipped with conical chamber, conical chamber is equipped with magnetic ball in the inside, first electromagnet is installed on the inner wall of one end away from communicating plate of conical chamber, and magnetic ball is magnetically attracted between first electromagnet, the bottom of communicating seat is communicated with hydrogen gas inlet pipe at first electromagnet, storage component includes hydrogen storage tank, the bottom of hydrogen storage tank is equipped with inlet hole, flowmeter is installed on the bottom of hydrogen storage tank at inlet hole, and flowmeter is fixedly connected with the upper end of communicating pipe on one end away from hydrogen storage tank.

This invention discloses a land use-based surveying device, relating to the field of land surveying technology. It includes a telescope tube mounted on a theodolite, comprising an objective lens and an eyepiece. A mounting groove is formed through the side wall of the telescope tube, and a fixing cover is fixedly inserted into the mounting groove. A through hole is formed on the side wall of the fixing cover, communicating with the telescope tube. A sealing plate for movably sealing the through hole is connected to the fixing cover via a first lifting mechanism. The sealing plate divides the telescope tube into a first chamber and a second chamber. An air extraction mechanism is provided on the side wall of the second chamber, and a drying mechanism is provided inside the fixing cover. This land use-based surveying device prevents humid air from entering the telescope tube when the eyepiece is replaced, and utilizes a desiccant to dry the inside of the telescope tube, ensuring the effectiveness of subsequent objective and eyepiece use, thereby guaranteeing the accuracy of the surveying.

This utility model discloses a packaging barrel and a material extraction device, relating to the field of chemical technology. The material extraction device includes an extraction pipe and a metal guide rod; one end of the extraction pipe has a connecting part; the extraction pipe passes through the barrel body via an extraction channel, and the connecting part is assembled and connected to a connecting seat; one end of the metal guide rod is hinged to the connecting part; the metal guide rod passes through the barrel body, and the end of the metal guide rod facing away from the connecting part abuts against the inner liner bag inside the barrel; When the material extraction device provided by this utility model is extracted from the packaging barrel, the metal guide rod can, on the one hand, provide support for the inner liner bag inside the packaging barrel, preventing the inner liner bag from sticking to the opening of the extraction pipe as the material decreases, ensuring extraction efficiency; on the other hand, the metal guide rod conducts communication between the material inside the barrel and other external components, effectively removing static electricity inside the barrel and ensuring safety during the extraction process.

This utility model relates to the field of traditional Chinese medicine packaging technology, and in particular to a traditional Chinese medicine packaging structure, including multiple inner medicine bags, multiple sleeves, multiple outer medicine bags, and multiple connecting straps. Each outer medicine bag has a placement cavity inside. The connecting straps have a first easy-tear line, and the multiple outer medicine bags are connected by the connecting straps. The first easy-tear line on the connecting straps facilitates the separation of each medicine bag when needed. The sleeves are fitted onto the outer medicine bags and are slidably connected to them. The lower part of the sleeves has a sealing cavity, and the extended end of the outer medicine bags is located in the sealing cavity, which enhances the sealing performance, reduces the chance of exposure to air, and thus reduces the risk of contamination and premature spoilage.