2results about How to "Reduced material required" patented technology

The application relates to a bag-in-bag-out filtering device, which relates to the technical field of biological safety and comprises the following: a ventilation duct is arranged in a box body; an air inlet and an air outlet are arranged on the box body and communicate with the ventilation duct; one or more filters are movably arranged in the ventilation duct; an opening is arranged on the box body and communicates with the ventilation duct; a sealing door is detachably arranged on the opening; a detection piece is arranged on one side of the box body close to the sealing door; and a frame body is arranged in the box body and abuts against the filter; the box body comprises a main body, an air inlet shell, an air outlet shell and a cover plate, and the ventilation duct is formed between the main body and the cover plate; the frame body and the main body are integrally bent and formed, one end of the frame body is embedded in the main body, and the other end of the frame body is bent and connected with the end of the main body. Compared with a traditional filtering box, the filtering device is integrally formed, welding leakage is avoided, the filtering device is not easy to deform, good sealing performance and pressure bearing strength are maintained, and the cost is reduced.

This utility model discloses a pipeline rescue and safety device, belonging to the field of pipeline repair. It includes a pipe tube with a main baffle fixedly connected to its top. A sealing gasket is placed between the pipe tube and the main baffle. A secondary baffle, coaxially arranged with the main baffle, is connected to the top of the main baffle via connecting bolts. The main baffle has a first drain port, and the secondary baffle has a second drain port corresponding to the first drain port and of the same size. The secondary baffle can rotate around the connecting bolts, and the rotation of the secondary baffle controls the opening and closing of the first and second drain ports. A sealing ring groove is provided on the main baffle at the edge of the first drain port. This pipeline rescue and safety device replaces traditional methods of using airbags and bricks to block water, avoiding safety accidents caused by water leakage due to airbag rupture, and also solving the accident risk caused by sudden water gushing out when removing brick plugs, thus ensuring the safety of personnel working in manholes or pipes.