Showing papers on "Bell mouth published in 2014"

An effective shape of floor splitter for reducing sub-surface vortices in pump sump

Abstract: An experimental investigation on the effective shape of a floor splitter to reduce sub-surface vortices and cavitation which arise in the vicinity of the pump bells in pump sump is performed. A test model sump was designed based on the Froude number similitude for the recommended structure layout by HI-9.8 standard for pump intake design. To obtain an effective shape of the splitter as an anti-vortex device (AVD), three types of quadrilateral submerged bar with different shape and dimension in sectional area are considered. From the experimental results with and without the splitter attached on the floor under the bell mouth, it was confirmed that the installation of the AVD is very effective to reduce abnormal vortices including sub-surface vortices, pre-swirls and other undesirable hydraulic phenomena. Because of the splitter, sub-surface vortices under the bell mouth did not appear anymore and the swirl was dramatically weakened. The evaluation of AVD was made by the measurement of swirl angles indicating the strength of the vortices and pre-swirls. Splitters with square sections showed partly large swirl angles beyond the acceptable criteria of HI standard though a large square was more effective than a small one. Meanwhile, the splitter with trapezoidal section was showed swirl angle values of less than 5 degrees in all cases of pump operation. Among the three types of AVD, the trapezoidal splitter is the most effective one to suppress the vortices. It is very useful to reduce the occurrence of submerged vortices and to obtain stable inflow condition for designing a high performance pump sump.

Blower and outdoor unit of air conditioner comprising same

Abstract: Provided are a blower, capable of suppressing noise occurring in a stator while significantly improving blowing efficiency, and an outdoor unit using the same The present invention comprises: a bell mouth part (11) spaced apart at a predetermined distance in the radial direction with respect to an outer circumferential end of a propeller fan (FN); and a diffuser part (12) installed on the downstream side of the bell mouth part (11), and having a flow path area which is enlarged from the upstream side toward the downstream side with a larger magnification rate than the magnification rate of the flow path area in the downstream end of the bell mouth part (11); and a stator part (2F) having a plurality of stators (22), wherein the stator part (2F) is arranged within the diffuser part (12)

Centrifugal blower and air conditioner using the same

Abstract: A centrifugal blower for an air conditioner may include a centrifugal fan rotatably coupled to a motor, and a bell mouth guiding air into the centrifugal fan. The centrifugal fan may include a hub fixed to a rotary shaft of the motor, a main plate provided at an outer circumferential surface of the hub, a shroud having a suction opening surrounding the rotary shaft, the shroud positioned opposite the main plate to define a main gas flow path, and a plurality of wings arranged along the circumferential direction of the suction opening between the main plate and the shroud. A rear axial end portion of the bell mouth may be inserted into the shroud through the suction opening so as to form a predetermined radial gap with the suction opening. The rear portion of the bell mouth may include a plurality of alternately formed protruding portions and recessed portions, with the protruding portions and the recessed portions inserted into the shroud.

Sound generator for a system for influencing exhaust noise of a motor vehicle

Abstract: A sound generator, for a system for influencing sound waves propagating through an exhaust system of a vehicle driven by an internal combustion engine, includes an enclosure comprised of an upper shell and a lower shell. A bell mouth, supported by the lower shell and penetrating the lower shell, is configured for a fluid communication with the exhaust system. A loudspeaker is disposed in the enclosure and supported by the bell mouth. The lower shell of the enclosure supports the upper shell of the enclosure. The bell mouth is solely supported by the lower shell of the enclosure. The lower shell may include at least one air-tight feed-through for a control wire connected to the loudspeaker and/or at least one pressure equalizing valve. An anti-sound system is provided that includes the sound generator and a vehicle is provided with the anti-sound system.

Outdoor unit for air-conditioning device

Abstract: An outdoor unit includes a housing having a front and side panel in which an opening is formed, a fan disposed in an air-sending device chamber formed inside the housing, an outdoor heat exchanger disposed in the air-sending device chamber, a bell mouth which is disposed in the air-sending device chamber and extends backwards from the periphery of the opening, and a heater which is disposed in the air-sending device chamber in which the bell mouth is disposed, and extends in the up and down direction.

Exhaust ventilation of re-spread prevention and increasing the displacement

Abstract: The present invention relates to an exhaust device capable of preventing re-diffusion and increasing displacement, in which when a blower is driven to generate a vortex and thus air containing pollutant is fed to the inside by atmospheric pressure difference and air flow, re-diffusion is prevented by a bell mouth spaced apart from the blower at a position as high as half the height of a wing of the blower; and the air flows quickly and effectively into the inside by a shroud structure of a wide-top and narrow-bottom shape, thereby increasing the displacement. The exhaust device includes a hollow housing formed with an exhaust pipe at one side to discharge air flowing into the inside; a motor provided in the housing and having a rotation shaft; an exhaust fan mounted on the rotation shaft of the motor; a lateral-flow type fan positioned above the exhaust fan coaxially with the exhaust fan to be rotated by suction flow speed of the rotating exhaust fan; a blower connected to the lateral-flow type fan by a coupling shaft and simultaneously rotated by rotation of the lateral-flow type fan to feed the outdoor air into the inside; a bell mouth spaced apart from the blower at a position as high as half the height of the blower by a given distance and positioned horizontally; and a shroud extended from one end of the bell mouth in a vertical direction and fixed to the housing in a wide-top and narrow-bottom shape having a slope toward the inside.

Air blower and outdoor machine for air conditioning device

Abstract: PROBLEM TO BE SOLVED: To provide an air blower capable of suppressing noise generated in a stator blade while greatly improving air feeding efficiency, and an outdoor machine using the same.SOLUTION: An air blower includes: a bell mouth part 11 that is arranged so as to be separated in a predetermined distance radial direction with respect to the outer peripheral end of a propeller fan FN; a diffuser part 12 that is provided on the downstream side of the bell mouth part 11 and whose flow passage area is enlarged from the upstream side to the downstream side at a magnification larger than the magnification of a flow passage area in the downstream end part of the bell mouth part 11; and a stator part 2F that includes a plurality of stator blades 22. The stator part 2F is arranged in the diffuser part 12.

Air blower, outdoor unit, and refrigeration cycle device

Abstract: An air blower is provided with: a propeller fan (1) having a convex winglet (1a) in the outer peripheral end of a pressure surface side, and having a plurality of blades for creating an air flow in the direction opposite that of gravity; and a bell mouth (2) forming an annular wall surface in a side further out than are the outer peripheral ends of the blades of the propeller fan (1). The bell mouth (2) has a wall surface in an inclined part (5a) that is an inclined surface, the wall being formed so that the air path on the discharge side expands, when the operating point of the propeller fan (1) is positioned further toward the open side than is a surging area, and the bell mouth (2) is shaped so that the following relationships are satisfied as conditions: the relationship H/D ≥ 0.04 between the length (H) in the rotational-axis direction between the terminal ends of the intake side and discharge side of the inclined surface, and the fan diameter (D) of the propeller fan; the relationship 10o < θ ≤ 45o of the angle (θ) that is formed, with respect to the rotational axis, by a straight line between the terminal ends of the inclined surface; and the relationship L/L 0 ≥ 0.5 between the length L in the rotational-axis direction from the open portion on the intake side to the terminal end portion on the intake side of the inclined surface, and the length L 0 of each of the blades of the propeller fan (1) in the rotational-axis direction.

Energy-saving gas flow descending type bulk curing barn structure with balanced ventilation

Abstract: The utility model discloses an energy-saving gas flow descending type bulk curing barn structure with balanced ventilation. The energy-saving gas flow descending type bulk curing barn structure comprises a heating chamber and a tobacco chamber, wherein the heating chamber and the tobacco chamber are separated by a party wall; the party wall is provided with a hot air passage penetrating through the party wall, a hot air return port and a moisture removal port; the top of the party wall is provided with a main air inlet; two side wall surfaces of the tobacco chamber are respectively provided with a lateral air inlet; the hot air passage is of a bell mouth structure with width gradually increased from the heating chamber to the tobacco chamber; two sides of the hot air passage are respectively provided with a clapboard; the clapboards are used for dividing the hot air passage into a main hot air passage and a lateral hot air passage. The main hot air passage is of a stepped bell mouth structure; hot air of the heating chamber is sprayed out from a bell mouth, so that hot air hybrid perturbation is facilitated, the area of a main hot air port is enlarged, the dead angle region between the heating chamber and the tobacco chamber is eliminated, and the hot air entering into the tobacco chamber from the heating chamber can be used for fully baking tobacco leaves in the tobacco chamber.

Plastic tube butting technology

Abstract: The invention discloses a plastic tube butting technology, and belongs to the technical field of plastic tube processing technologies. The technology mainly comprises the following steps: 1, cleaning the internal surface and the external surface of a plastic tube end; 2, setting a coupling on the external surface of the plastic tube; 3, arranging a support device in the plastic tube; 4, using a flaring device to flare the end of the plastic tube to form a bell mouth; 5, carrying out cooling shaping of the bell mouth, and dismounting the flaring device and the support device; 6, installing a joint at the bell mouth, connecting the coupling with the joint, and compressing the bell mouth between the coupling and the joint; 7, connecting the other end of the plastic tube to a joint through a coupling; and 8, relatively connecting two flange connecting ends. The technology can guarantee that the flow of a butting pipeline is not influenced, can also guarantee that a butting position can bearing enough large radial impact force and axial impact force, and can be widely used in the plastic tube butting.

Novel bell mouth for spinning

Abstract: The utility model discloses a novel bell mouth for spinning, and relates to the field of spinning accessories. The novel bell mouth adopts the structure that a partition is arranged at the middle part of the bell mouth, and is used for diving the bell mouth into a left bell mouth and a right bell mouth; a heightened bell mouth is arranged on the right bell mouth, and is detachably connected with the right bell mouth; with the heightened bell mouth, a shape of a high-low bell mouth is formed; two rough yarns are in a state of skew lines when moving from a yarn guide rod to the bell mouth, and the distance between the two rough yarns is obviously increased, so that not only is mutual adhesion of fiber hairiness between the rough yarns reduced, but also the cleaning of the bell mouth is facilitated, and quality problems that the hairiness of the rough yarns winds each other to break the yarns to form broken ends, and short fibers gather to form point junction and a color beam, in the sirospun production process, are reduced effectively; in addition, the partition is detachably connected with the bell mouth, and the heightened bell mouth is designed to be detachably connected with the right bell mouth, so that the heightened bell mouth and the partition can be dismantled to enable the bell mouth to be like a normally-used bell mouth when not in sirospun production; the bell mouth provided by the utility model has two functions, reduces cost, and is convenient and practical.

Cleaning device for bell mouth support ring on cement pipe mould

Abstract: The utility model relates to a cleaning device for a bell mouth support ring on a cement pipe mould. The cleaning device for the bell mouth support ring on the cement pipe mould comprises a hydraulic cylinder, a gearbox, a guiding rod, guiding sleeves, a bracket, a cruciform cross beam, a trolley and cleaning heads, wherein a vertical shaft, a motor and a pair of gears are arranged inside the gearbox; the lower end of the vertical shaft is fixedly connected with the cruciform cross beam; four cleaning heads are fixedly connected to the four ends of the cruciform cross beam; the cleaning heads comprise cleaning head connecting frames and cleaning head motors; the cleaning head motors drive steel brushes to rotate; the hydraulic cylinder drives the gearbox and all the cleaning heads to do up-and-down motion; the motor inside the gearbox drives all the cleaning heads to rotate around the vertical shaft. Through all the movements, all the cement residues on the working surface of the bell mouth support ring can be cleaned up in one attempt. According to the utility model, the working efficiency is improved and no dust pollution is caused.

Buried PE (poly ethylene) double-wall corrugated pipe

Abstract: The utility model provides a buried PE double-wall corrugated pipe which comprises an inner pipe, a connecting layer, a corrugated pipe, a bell mouth and an insertion opening, wherein a pipe body sequentially comprises the inner pipe, the connecting layer and the corrugated pipe from inside to outside, and functional layers are glued together through a gluing material; the bell mouth is arranged at one end of the pipe body; and the insertion opening is formed in one end opposite to the bell mouth; and an elastic sealing ring is mounted on the outer side of the corrugated pipe at the end of the insertion opening. According to the buried PE double-wall corrugated pipe, the elastic sealing ring is mounted on the outer side of the corrugated pipe at the end of the insertion opening, outer diameters of the front side and the back side of the elastic sealing ring are different, and one side, having the smaller outer diameter, of the elastic sealing ring is adjusted to the tail end of the insertion opening during mounting, so that the insertion opening is conveniently inserted into the bell mouth, the connection seal is reliable, the leakage is not prone to happen, and the problem that a straight pipe is easy to separate due to axial force during bell and spigot joint is solved.

Mold core for insulation common-mold extruding of medium voltage crosslinked cable

Abstract: The utility model relates to the field of extrusion and insulation, and specifically relates to a mold core for the insulation common-mold extruding of a medium voltage crosslinked cable. An inner through hole of the mold core comprises a sizing area and a bell mouth connected with each other, the sizing area is a round through hole with an invariable internal diameter, the bell mouth is a round through hole with an internal diameter gradually increasing, the external surface of the mold core comprises positioning areas, taper positions and flashes in sequence from the sizing area to the bell mouth, and the mold core is formed by the combination of two half molds. According to the mold core, one mold and dual purpose can be realized in the extruding and insulation of the middle voltage crosslinked cable, the extruding production of adjacent two size and specification common molds is realized, the cost for restarting is effectively reduced, the rejection rate is reduced, the production speed is increased, the product quality is improved, and the production efficiency is improved.

Pulse-atomization electrostatic oil coating nozzle

Abstract: The utility model relates to a pulse-atomization electrostatic oil coating nozzle. According to the technical scheme, a plastic membrane (1) is arranged between a left knife girder piece (4) and a right knife girder piece (10); a rectangular oil groove (5), an upper oil injection gap (9), an oscillation chamber (8), a lower oil injection gap (7) and an oil nozzle (6) are sequentially formed in the left knife girder piece (4) and the right knife girder piece (10) from top to bottom. The gap of the upper oil injection gap (9) ranges from 0.2mm to 0.6mm. The width of the lower oil injection gap (7) is 1-2 times that of the upper oil injection gap (9). The section of the oscillation chamber (8) is of a rectangular shape. The height of the oscillation chamber (8) is 2-3 times the width of the upper oil injection gap (9). The width of the section of the oscillation chamber (8) is 3.5-8.8 times the width of the upper oil injection gap (9). The cross section of the oil nozzle (6) is of a bell mouth shape, wherein the taper angle of the bell mouth of the oil nozzle (6) ranges from 30 degrees to 50 degrees. The pulse-atomization electrostatic oil coating nozzle not only can effectively reduce energy consumption of an electrostatic oiler and improve the reliability of the electrostatic oiler, but also has the advantages of being simple in structure, good in atomization effect and high in safety.

Composite enhanced HFCM double-wall corrugated pipe

Abstract: The utility model provides a composite enhanced HFCM double-wall corrugated pipe which comprises a corrugated pipe body The inner wall of the corrugated pipe is a flat and straight pipe section The outer wall of the corrugated pipe is provided with trapezoidal raised rings The raised rings are in corrugated distribution along the axis direction of the circular tube The raised ring is internally provided with a square cavity One end of the double-wall corrugated pipe is a bell mouth, and the end opposite to the bellmouth is an insertion mouth The bell mouth is internally and fixedly provided with inner raised rings corresponding to the outer wall The tail end of the insertion mouth is provided with a solid raised ring The surface of the solid raised ring is provided with a groove for a sealing ring to be embedded in With the design above, the composite enhanced HFCM double-wall corrugated pipe has the advantages of high strength, good flexibility and light weight and the like

Polyphase flow filtering separator

Abstract: A disclosed polyphase flow filtering separator consists of a barrel, an air inlet pipe, a conduit, a filter core, an air outlet pipe, an upper discharge pipe and a lower discharge pipe; the conduit is provided with a flow guide device via a flange, and the flow guide device consists of a bottom cap shaped of a concave surface, flow guide blades and a top cover shaped of a bell mouth; and multiple arc-shaped flow guide blades are installed between the top cover and the bottom cap and arranged in a circular array, so that a gas channel rotating upwards is formed, and the cross-sectional area of the gas channel enlarges gradually along the gas flow direction, and the gas flow velocity reduces gradually. On the one side, the gas in cyclone state helps to realize pre-separation of impurities, reduce work load of other separation components in the filtering separator, prolong the service life of the filter core and reduce operation cost; and on the other hand, the flow filed distribution of the gas in the filtering separator is improved, the gas flow velocity is alleviated, the impact of the gas to the inner wall of the barrel of the filtering separator is effectively buffered, and the work load of the filter core is averagely distributed.

Portable degree of vacuum measuring apparatus for boiler

Abstract: The utility model discloses a portable degree of vacuum measuring apparatus for a boiler. The portable degree of vacuum measuring apparatus for the boiler comprises a vacuum meter, and a stop valve, a taper seal plate and a connection main tube which are connected in a unibody structure from right to left; the taper seal plate has a hollow truncated cone structure, the upper end face of the truncated cone is connected with the connection main tube, the lower end face of the truncated cone is connected with one end of the stop valve, and the vacuum meter is connected with the other end of the stop valve; and the portable degree of vacuum measuring apparatus for the boiler further comprises a circular seal plate, the center of the circular seal plate is provided with a bell mouth, the conicity of the bell mouth is the same as the conicity of the taper seal plate, the connection main tube penetrates in the bell mouth, and the circular seal plate and the taper seal plate cooperate with each other and are sealed together. The portable degree of vacuum measuring apparatus for the boiler is applied to on-site measurement of degrees of vacuum of the boiler, a flue and the like, and particularly suitable for a maintainer to measure the degree of vacuum of a boiler when an instrument of an on-site boiler deviates from standard or is damaged, the degree of vacuum can be stored and displayed after measurement, and the portable degree of vacuum measuring apparatus for the boiler is convenient to carry.

Vortex preventing disc device for ballast tank suction mouth

Abstract: The present invention relates to a vortex preventing blade for the pumping inlet of a ballast tank (10) including an intake pipe (20) on the inlet with a bell mouth (25) between them; a band member (30) above the bell mouth (25) to cover the intake pipe (20); and blade piece members (40) radially fixed to the outer circumference of the band member (30). Therefore, the present invention improves the performance of a pump and extends the service life of the pump by preventing a vortex when ballast water is discharged; and improves the convenience of workers when the workers periodically replace components which are susceptible to corrosion as they come in contact with seawater.

Production line air exhausting device

Abstract: The utility model discloses a production line air exhausting device. The production line air exhausting device is mounted by being coordinated with a production line operating platform, and comprises an air sucking assembly and an air blowing assembly; the air sucking assembly is mounted on the side above the operating platform; the air blowing assembly is positioned on the other side of the operating platform, and opposite to the air sucking assembly; the air blowing assembly comprises a hollow air blowing pipe and an air blowing power source; an air-out seam is formed in one side, relative to the air sucking assembly, of the air blowing pipe so as to form an air curtain type air outlet structure. According the addition of the air blowing equipment, an air curtain is formed, the size of an air sucking bell mouth needs to cover the range of the air curtain, that is the air curtain blows volatile gas to the bell mouth, and does not exceed the range of the bell mouth; meanwhile, the air blowing amount of the air curtain needs to be slightly smaller than the air sucking amount of the bell mouth, so that the problem that the volatile gas is hard to effectively exhaust after glue coated or glue dipped products are placed on a big platform surface is solved.

Apparatus for measuring differential pressure in air blower

Abstract: The present invention relates to an apparatus for measuring a differential pressure in an air blower, comprising: a bell mouth provided with an inlet for introducing air into the air blower; a differential pressure cover coupled to the bell mouth for transmitting an inlet pressure change through a tube; and a differential pressure measuring unit for detecting the inlet pressure change transmitted through the tube. According to the present invention, a differential pressure is measured in an intake port side of the air blower in which an air flow is most stable, while keeping the apparatus from acting as an air flow resistor so as to prevent the occurrence of turbulence, thereby allowing an accurate measurement of the differential pressure.

Bell mouth copper pipe terminal

Abstract: The utility model provides a bell mouth copper pipe terminal including an end face, an inclined plane and a tail which are disposed in an integrated mode The inclined plane is disposed between the end face and the tail and provided with a peephole; the end face is provided with a threaded hole; and the upper portion of the tail is a bell mouth, the lower portion of the tail is a circular pipe, and the upper portion and the lower portion are disposed in an integrated mode According to the bell mouth copper pipe terminal, the peephole is disposed in the inclined plane based on a present terminal, to make it convenient to check that whether a wire is inserted in the bottom or not; and the tail is stamped in to a bell mouth to make it convenient to thread a wire

Airflow uniform distribution device suitable for high-concentration dust remover

Abstract: The utility model relates to an airflow uniform distribution device suitable for a high-concentration dust remover The airflow uniform distribution device comprises a bell mouth, wherein a first distribution plate, a second distribution plate and a third distribution plate are mounted in the bell mouth in sequence; a first flow guiding plate is mounted at the upper part of the second distribution plate; a second flow guiding plate is mounted at the lower part of the third distribution plate; the lower parts of the first flow guiding plate and the second flow guiding plate form a swing structure The airflow uniform distribution device has the benefits that the service life prolonging requirement and the international requirement that the airflow uniform distribution property Sigma is equal to or lower than 02 of a high-concentration electric dust collector are be met; compared with the conventional structure of the airflow uniform distribution device, the reliability is improved, both the manufacture and mounting are convenient, and the running time of the high-concentration dust remover is prolonged

Improved bell mouth of dummy pipe

Abstract: The utility model relates to an improved bell mouth of a dummy pipe. The improved bell mouth comprises a cylindrical bell mouth body with one tapered end, and the tapered end of the bell mouth body is connected with a second cylinder. The improved bell mouth of the dummy pipe has the advantages that 1) the improved bell mouth is integrally ingenious in structural design, high in practicality and convenient to replace and assemble on site; 2) owing to the second cylinder which is arranged additionally, rolled workpieces can pass smoothly; since the diameter of the second cylinder is larger than that of the bell mouth body and the inner conicity of the second cylinder is identical to that of the bell mouth body, smooth transition can be guaranteed; the large diameter enables a conical opening extending outside to be larger, and accordingly the rolled workpieces can enter the bell mouth more easily during dummying; 3) the improved bell mouth is applicable to dummy pipes of high-speed wires, and when large-size products are rolled and dummying is required by some gates in a high-speed area, the dummy pipe with the improved bell mouth can be used for effectively avoiding shaking of the rolled workpieces to enable the rolled workpieces to run smoothly, and extrusion is avoided.

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.

Device for liquid degassing

Abstract: The present invention relates to a device for liquid degassing by means of swirling or centrifugal force coupled with a pressure gradient. This device comprises a cavity. The cavity is furnished with an inlet for liquid-gas mixture, a gas outlet and a liquid outlet. The gas outlet is inserted into the cavity through the top end of the cavity and positioned around 0.1-3 times the maximum diameter of the cavity from the top of the cavity. Specifically, an overflow pipe with the diameter gradually increasing from the bottom to the top was used as the gas outlet. The overflow pipe is further furnished with a bell mouth at the bottom part.