Bell mouth

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

Steam spray nozzle

Abstract: The embodiment of the utility model discloses steam spray nozzle, including the shower nozzle, the shower nozzle includes a casing, still be equipped with an inner tube in the casing, steam outlet hole on the casing is the bell mouth, the one end that the inner tube is close to steam outlet hole is the conical duct, the conical duct is worn to establish in the bell mouth, and the conical duct with leave certain space between the casing, the inner tube with the casing is followed the axial swing joint of inner tube. The embodiment of the utility model provides a conical duct bell mouth along conical duct axial displacement relatively among the steam spray nozzle, the removal through the conical duct can change airflow outlet's sectional area, and then changes the flow of air current, that is to say, the utility model provides a steam spray nozzle changes the flow of air current through the sectional area that changes airflow outlet under the circumstances that does not change atmospheric pressure, can not influence the atomizing particle diameter of liquid when the air current flow changes promptly.

Hollow annular sandwich type gas burner

Abstract: Disclosed is a hollow and circular shaped sandwich type gas burner which is mainly composed of a gas burning chamber and a gas inlet pipe The gas burning chamber is composed of an external cover and internal cover that form a circular sandwich shape with closed upper roof and lower bottom; a plurality of vertical slits are distributed with equal distance along the circumference at the upper part of the external cover in order to communicate an interlayer inner chamber with outside; the upper part of an inner hole enclosed by the inner cover communicates with the lower part; the lower part of the interlayer inner chamber is a circular ring that intertwines the inner hole; the front end of the gas inlet pipe is in the shape of an inward contracting bell mouth; the gas inlet pipe necked down by the bell mouth has a gradually increasing inner diameter and a bending back end which is communicated with the lower part circular ring of the interlayer inner chamber of the gas burning chamber; a gas inlet cover is arranged at the front end of the gas inlet pipe The utility model can completely burn gas, thus improving thermal efficiency and reducing environmental pollution Besides, the utility model has small structure and wide application range and can be used in producing all sorts of heating equipment with gas heating source, such as a gas cooking pot

Noise reduction device for outlet of ship drainage pipeline

Abstract: The utility model relates to a noise reduction device for an outlet of a ship drainage pipeline. The noise reduction device for the outlet of the ship drainage pipeline comprises a bell mouth-shaped diverging flow guide pipe. Airfoil profile rectification pillars are arranged at intervals along the peripheral direction of the bell mouth-shaped end face of the bell mouth-shaped diverging flow guide pipe and the other ends of the airfoil profile rectification pillars are connected with a top plate so as to form a radial water outlet; and a vibration absorption spreader is arranged at the position on the inner surface of the top plate, which corresponds to a bell mouth of the diverging flow guide pipe. According to the utility model, axial water flow of the drainage pipeline is converted into a radial run, axial seawater is avoided directly rushing out of a side, the flow rate and fluid jet noise are reduced, a seawater fluctuating force also can be adsorbed and noise is reduced; the vibration absorption spreader can adsorb fluid impact; and the airfoil profile rectification pillars are airfoil profile line-type structures with excellent hydrodynamic performance, formation of seawater vortex of a pipe orifice can be effectively controlled, the vortex size is controlled by regulating the number of the rectification pillars and the flow field is homogenized, so that drainage noise is further reduced. The noise reduction effect of the noise reduction device reaches about 5dB, i.e. radiation noise energy is attenuated to 30 percent of original radiation noise energy.

Automatic bellmouth cleaning and paint spraying device

Abstract: The utility model provides an automatic bellmouth cleaning and paint spraying device, which belongs to the technical field of nodular cast iron pipe production and comprises a riding wheel mechanism,each group is provided with a base, a rotary table, a first motor and a riding wheel, and the riding wheels are used for erecting and driving nodular cast iron pipes; the underframe is fixed on the ground and is positioned on one side of the riding wheel mechanism; the cleaning assembly is arranged on the underframe and is provided with a steel wire grinding head for cleaning the bellmouth; the paint spraying assembly is fixedly connected to the cleaning assembly and connected with a paint source under pressure; the positioning catch wheel is arranged on the underframe and is used for axiallypositioning the nodular cast iron pipe; the power assembly comprises an oil cylinder used for driving the cleaning assembly to move horizontally and vertically; the infrared sensor is connected to thebottom frame and used for sensing the nodular cast iron pipe; and the PLC is fixed on the underframe and is used for receiving signals of the infrared sensor and controlling the three components. Theautomatic cleaning and paint spraying device for the bell mouth is easy to operate, automatic cleaning and paint spraying of the bell mouth are achieved, and the working efficiency is improved.

Straight Flow Turbine

Abstract: The simplest arrangement of a low-head hydro-electric unit is that proposed by the well-known American engineer, L. F. Harza in 1919–22; Fig. 1 is taken from his Patent Specification. The generator rotor is mounted on the propeller runner, the water flowing through the generator rim and the turbine casing being sealed against the flanks of the generator rim on either side. The unit has a horizontal shaft so that an inlet bell mouth suffices to lead the water to the runner, and the draft tube can be the straight diffuser, which is the most efficient form of energy recovery.