Bell mouth

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

Device for prolonging service life of cloth bag through leak detector

Abstract: The invention provides a device for prolonging the service life of a cloth bag through a leak detector. A clean gas outlet blind plate valve and an ash conveying valve are respectively arranged at an inlet and an outlet in a conical casing. A lower part at the left side of the conical casing is sequentially provided with a lower inlet hole and a compressed air valve. A central part at the right side of the conical casing is sequentially provided with an upper inlet hole and a half-clean gas inlet blind plate valve. Each cloth bag internally provided with a keel bell mouth is vertically arranged between the upper inlet hole and the lower inlet hole of the conical casing. The cloth bags internally provided with the keel bell mouths are additionally provided with the leak detector. An upper plate and a lower plate of the leak detector are provided with detection holes which are matching with the number and the mouth dimension of the cloth bags. Detection tubs fixed on the lower plate are combined with the keel bell mouths of the cloth bags. Bolts for fixing a filtering material are arranged at two ends of the upper plate and the lower plate.

General trumpet tuning and correction system.

Abstract: General trumpet tuning and correction system. The system is based on fitting a telescopic section 6 between the elbow of the sound tube that emerges from the respective "engine" 2 of the instrument and the bell or bell mouth 4 for the exit of air, this telescopic coupling being formed of an integral section 6 of the elbow 5 and a moveable section 6' forming part of the internal end corresponding to the bell mouth 4, movement taking place in one direction or the other of both sections 6 and 6' by means of a rod 7 with a threaded end section 9, a rod 7 that is manually operated by means of an external control 8 and enables the general tuning of the instrument to be carried out by rotating the rod 7, while its axial movement enables the correction of this tuning and a separate tuning of each of the notes forming part of the trumpet's register.

circulation air enlargement device for underground parking lot using venturi principle

Abstract: The present invention relates to a circulation air volume increasing apparatus using the venturi principle for an underground parking lot, capable of enabling smooth air supply and exhaust by forcibly circulating an indoor air current (air) in an underground parking lot in which an air flow is stagnant. According to an embodiment of the present invention, the circulation air volume increasing apparatus includes: a fixing bracket of which the top is mounted on the ceiling of an underground parking lot; a driving motor installed on a fan joint pipe mounted in the bottom of the fixing bracket; an impeller connected to the driving motor to circulate an indoor air current in the parking lot through intake and discharge when rotated; an inflow side sound absorption pipe and a discharge side sound absorption pipe, formed at both ends of the fan joint pipe to absorb a noise generated when the indoor air current is sucked and discharged through the rotation of the impeller; a bell mouth formed in an opening part of the inflow side sound absorption pipe, and inducing the intake of the indoor air current during the rotation of the impeller; a nozzle pipe extended from the outlet of the discharge side sound absorption pipe, and inducing the discharge of the indoor air current during the rotation of the impeller; and an air volume increasing pipe having both ends opened and formed at a random distance from a lateral surface of the nozzle pipe. Therefore, the indoor air current in the underground parking lot is sucked through the bell mouth when the impeller is rotated, and the pressure of the indoor air current sucked through the bell mouth and discharged through the nozzle pipe enables an indoor air current around the inlet of a venturi passage between the air volume increasing pipe and the nozzle pipe to be sucked into the air volume increasing pipe, thereby increasing the air volume.

Attachment structure for bell mouth

Abstract: This attachment structure is for a bell mouth 14 that has one end side thereof attached to a fan shroud 11 fixed to a radiator, that has the other end side thereof fixed to an engine E and attached to a fan ring 13 surrounding a fan 12, and that covers the gap between the fan shroud 11 and the fan ring 13, said attachment structure being provided with: a first attachment member 21 provided to one of the other end side of the bell mouth 14 and the outer circumferential side of the fan ring 13; and a second attachment member 22 that is attached to the first attachment member by magnetic force and that is provided to the side not having the aforementioned attachment member provided thereto among the other end side of the bell mouth 14 and the outer circumferential side of the fan ring 13.

Air flotation type air power leaching tank

Abstract: The invention relates to an air flotation type air power leaching tank which comprises a tank body, a slurry inlet pipe, bottom-layer lacing bars, lifting cylinders, branch wind pipes I, upper-layer lacing bars, a wind inlet pipe, a ball valve, an air flowmeter, air distributors, a slurry outlet pipe, branch wind pipes II, branch wind pipe fixing bars, support legs and a manhole. The air flotation type air power leaching tank is characterized in that the lifting cylinders are steel pipes, a bell mouth is welded at the bottom of each lifting cylinder, one lifting cylinder is arranged at the center of the tank body, other lifting cylinders are uniformly arranged in the form of a regular hexagon, the air distributors in the number which is a multiple of 6 form an annular wind box according to the size of the tank body, and a plurality of branch wind pipes are connected on the air distributors, so that the problems of non-uniform wind supply and large consumption of kinetic energy during the production process can be solved. The device is simple in structure, uniform in wind distribution, smooth to work and small in consumption of the kinetic energy, can improve the recovery rate and reduce the production cost, is suitable for metallurgy, chemical engineering and environmental protection industries and belongs to the technical field of mechanical equipment in gold smelting industry.