2results about How to "Good anti-backflow effect" patented technology

This utility model provides a check valve installation mechanism and a flue sealing mechanism, belonging to the field of flue sealing, to solve the problem of oil fumes seeping into the user's room through gaps such as the valve body edge and the connection with the wall; it includes a first fixing member with a square first receiving groove; a first elastic sealing member disposed in the first receiving groove; a second fixing member with a through hole, the side wall of the through hole being bent towards the wall to form a square limiting part, which is used to insert into the first receiving groove; and a second elastic sealing member disposed on the side wall of the second fixing member facing the wall, for abutting against the wall; through the action of the first elastic sealing member and the second elastic sealing member, gaps between the second fixing member and the wall caused by protrusions or grooves on the installation wall, as well as gaps at the connection between the first fixing member and the second fixing member caused by protrusions or grooves, can be effectively avoided, ensuring that a seal can be achieved.

The utility model provides a dust bag's butt joint device of dust catcher relates to dust catcher accessory technical field, including connecting pipe A, bellows, movable pipe, the upper end of connecting pipe A is equipped with fixed pipe, and the downside surface of fixed pipe is fixedly connected with the upside surface of connecting pipe A, the bellows is placed in the lower end outside connecting pipe A, and bellows and the lower end outside connecting pipe A are movably connected, the lower end of bellows is connected with connecting pipe B, and is equipped with thread on the upper end outside connecting pipe B, through the inside of two groups of connecting pieces is connected with three groups of inclined baffle respectively, and six groups of inclined baffles staggered arrangement, when dust catcher works, airflow carries dust and can smoothly pass through the clearance between inclined baffle and enter dust bag, and when dust catcher stops, the dust in dust bag can be blocked by staggered inclined baffle and backflow to dust catcher pipeline, reduces secondary pollution, solved the problem that dust bag's butt joint device of existing dust catcher is difficult to prevent dust in dust bag from backflowing completely.