Bell mouth

About: Bell mouth is a research topic. Over the lifetime, 603 publications have been published within this topic receiving 1624 citations.

Mouth-to-mouth resuscitation butt-joint device

Abstract: A connector for artificial respiration comprises a hollow duct having an arc-shaped sealing at the lower end, an air outlet formed on the side surface of the duct above the sealing, a convex ring arranged on the outer wall of the duct above the air outlet, and a rubber cap sheathed on the outer wall of the duct, wherein the periphery of a middle hole of the rubber cap is clamped in the groove below the convex ring of the duct, and the rear end of the duct has a bell mouth. When in use, the lower end of the duct is inserted into the mouth of a rescuee, the peripheries of the rubber cap and the mouth of the rescuee are sealed, the lips of a rescuer are aligned to the bell mouth, and the rescuer blows air to carry out artificial respiration, thereby isolating the lips of the rescuer and the rescuee to prevent cross infection of bacteria and viruses and keeping sanitation.

Integrally-formed nodular cast iron pipe jacking die

Abstract: The utility model discloses an integrally-formed nodular cast iron pipe jacking die. Pipe die, the pipe die is provided with a bell mouth end and a spigot end which are arranged corresponding to the bell mouth pushing part and the spigot pushing part of the jacking pipe; a bell mouth core is arranged at the bell mouth end; a plurality of mold core grooves which are uniformly distributed in the circumferential direction are formed in the inner wall surface of the pipe mold; each mold core groove is filled with a pipe mold core, the multiple pipe mold cores and the bellmouth core form a bellmouth pushing body forming groove at the bellmouth end in a surrounding mode, and the multiple pipe mold cores form multiple inserting opening pushing body grooves which are evenly distributed in the circumferential direction at the inserting opening end and the inner wall face of the pipe mold in a surrounding mode; according to the technical scheme provided by the utility model, the socket pushing body forming groove comprises the plurality of socket pushing body grooves which are uniformly distributed along the circumferential direction, so that the integrally formed nodular cast iron jacking pipe is produced, the bell mouth pushing body and the socket pushing body of the jacking pipe can be integrally formed and cast, and the nodular cast iron jacking pipe is easy to draft, good in quality, low in production cost and high in production efficiency.

Fiber whisker uniformity detector sample loading and conveying mechanism

Abstract: The invention relates to a fiber whisker uniformity detector sample loading and conveying mechanism The mechanism comprises a positioning slide rail assembly, hand screws, a bell mouth bracket and a bell mouth, wherein the positioning slide rail assembly is fixed on a base; the bell mouth bracket is fixed on the positioning slide rail assembly through the hand screws; and the bell mouth is tightly nested in an upper hole of the bell mouth bracket The mechanism has the advantages that: the operation is convenient, and the assembly position of the bell mouth does not need to be adjusted in each test After the assembly position of the bell mouth is checked at a working station, sampling loading test can be repeatedly performed; and guide wheel undercut and blockage are not easily caused after a sample is loaded, so the work efficiency is high

Feed processing encircles mould

Abstract: The utility model provides a feed processing encircles mould belongs to processing technical field, include the ring calligraphy or painting model body, the ring calligraphy or painting model body is provided with a plurality of nibs, and the nib includes the interior reaming and the pelletization hole of intercommunication each other, and interior reaming includes two at least interconnect's bell mouth, and two bell mouths are first bell mouth and second toper hole respectively, and the cone angle angle of first bell mouth is lighter than the cone angle angle in second toper hole. The feed processing encircles mould that this technical scheme provided not only can make the ejection of compact of fodder granule smooth and easy, reduces the pulverization rate, and underreamed wearability in can improving moreover makes the difficult wearing and tearing in edge in pelletization hole.

Ring channel piton hole static and dynamic pressure gas bearing

Abstract: The utility model provides a ring channel piton hole static and dynamic pressure gas bearing, the utility model relates to a ring channel piton hole static and dynamic pressure gas bearing. The utility model discloses an improve that static pressure gas bearing rigidity is little among the prior art, bearing capacity low, the interference killing feature is poor, the weak point of poor stability when the high speed operates. The bearing is the cylinder, the cylinder is opened along the axis direction has the axial hole, the cylinder has double multiunit air feed hole along the processing of radial equipartition, and every group air feed hole forms with the flow controller cooperation, the flow controller is by the throttle aperture, bell mouth and circular equalization tank constitute, throttle aperture and air feed hole communicate with each other, throttle aperture and bell mouth hole top communicate with each other, bell mouth hole bottom and circular equalization tank communicate with each other, and it connects multiunit air feed hole to lead to the groove a little along axial hole internal surface ring -opening shape on circular equalization tank, it logical groove communicates double air feed hole a little to open the axial along the axial hole internal surface again, the cylinder has wedge curved surface groove along the processing of circumference equipartition, the axial lead in every air feed hole all passes through the axis of cylinder, and quadrature.