Showing papers on "Bell mouth published in 2010"

Bubble wet processing dust container

Abstract: The invention discloses a water medium filtering and dust removing bubble wet dust collector, which comprises a tank body (1), a water tank (2) arranged under the tank body (1), an ejector positioned over the tank body, a drain pipe (10) positioned below the water tank, a door (11) arranged at the side of the tank body, a filter plate (8) in the tank body, a pumping elbow (4) fixed on the water tank, a bell mouth (41) at the outlet end thereof, a layer of perforated metal sheet (5) arranged close to the working water surface and supported by a bar bearer (12) in the tank body The bell mouth (41) enters into the water through the perforated metal sheet (5); the middle most of the lower part of the bell mouth (41) is provided with a pyramidal guide wind bucket (6) which is suspended at theinner side of the bell mouth (41) through a duct regulating thread slipping (7), thereby ensuring the outer side of the guide wind bucket (6) and the inner side of the bell mouth form an annular exhaust passage (42), size of which can be adjusted The invention has simple structure and generates bubble through the guide wind bucket, thereby ensuring the pumped dust gas can fully enter into the water to be filtered and saving energy

Bell-mouth structure of air blower

Abstract: A bell-mouth structure of an air blower provided around a blade wheel of an axial-flow air blower for guiding air from an air suction side of the blade wheel to an air blow-out side including an air blow-out wall portion that intercommunicates with an air blow-out opening and extends substantially along an axial direction of the blade wheel, and a slope wall portion that intercommunicates with the air blow-out wall portion and slopes to an air suction opening so as to expand in diameter. When the overall height of the bell-mouth is represented by H, the height of the slope wall portion is represented by h and a slope angle of the slope wall portion is represented by β, the bell mouth structure is configured so as to satisfy 0.33≤h/H≤0.42 and 60°≤β≤70°.

Axial blower, air conditioner, and ventilation fan

Abstract: PROBLEM TO BE SOLVED: To provide an axial blower of noise performance and efficiency improved by reducing jet stream generated at a gap between an outer circumference end edge of blades and a bell mouth, and an air conditioner and a ventilation fan using the axial blower. SOLUTION: In this axial blower, the bell mouth 5 is disposed at an outer circumference of an impeller 4 comprising a plurality of forward swept wing type blades 13. The bell mouth 5 includes a throttling part 52 formed oppositely to the outer circumference of the impeller 4 so as to partition a blow out zone and a suction zone of the blower, a suction side opening part 51 expanding a suction side of the throttling part 52, and a blow out side opening part 53 expanding a blow out side. The throttling part 52 comprises a first throttling part 52a forming a gap g of necessary minimum dimension n with the outer circumference end edge R of the blades 13 and a second throttling part 52b forming a gap of dimension greater than the necessary minimum dimension n with the outer circumference end edge R of the blades 13. The second throttling part 52b is formed at a blow out side of the first throttling part 52a. COPYRIGHT: (C)2011,JPO&INPIT

Transmission-type microwave moisture measuring device

Abstract: The utility model relates to a transmission-type microwave moisture measuring device, which comprises a microwave transmitter and a microwave receiver which are arranged parallelly. An included angle between a bell mouth of the microwave transmitter and a plane of a measured object is larger than 0 degree and smaller than 30 degrees, and then microwaves reflected by the measured object can be deviated from the bell mouth of the microwave transmitter, thereby avoiding microwave interference, and guaranteeing accuracy, sensitivity and reliability of moisture measurement. For the purpose of guaranteeing microwaves penetrating through the measured object to be received by the microwave receiver basically, the diameter of a bell mouth of the microwave receiver is smaller than or equal to the diameter of the bell mouth of the microwave transmitter, thereby further increasing accuracy, sensitivity and reliability of measurement. The transmission-type microwave moisture measuring device applies microwave measurement into on-line measurement of moisture of measured objects and production actuality, realizes controlling the device, and has certain practical significance for guaranteeing product quality, saving energy sources and improving benefits of industries.

Elliptical stream guidance pier of large-scale vertical pump

Abstract: The utility model discloses an elliptical stream guidance pier of a large-scale vertical pump. The stream guidance pier comprises three parts including a stream guidance cone (1), a stream guidance support pillar (2), and an elliptical bell mouth (3), wherein the stream guidance cone (1) can be fixed on a baseplate of a water absorption pool with anchor bolts, the elliptical bell mouth (3) and the stream guidance cone (1) are connected with the stream guidance support pillar (2), and the upper end opening of the elliptical bell mouth (3) is butted with a pump casing. The elliptical stream guidance pier has the advantages of simple structure, low cost, good stream guidance effect, small water power loss, and high pump efficiency, can be widely applied in large-scale vertical diagonal flow pumps, vertical axial pumps, and vertical major axis pumps, and has excellent economic benefits and social benefits.

Jet auto-generating flow metre

Abstract: FIELD: machine building. ^ SUBSTANCE: jet component (1) of auto-generating flow metre consists of feed nozzle (5), working chamber (6), control nozzles (10 and 11), receiving channels (12 and 13), divider with concave deflector (9), drain channels (14 and 15) and channels or back feed (16 and 17), also of converter (2 and 3) of jet pulses into electric signal connected with facility (4) of signal isolation proportional to frequency of pulsation. A local bell mouth (18) ended with ledge (19) is made at input of feed nozzle (5). Angle of incline of bell mouth to axis of the feed nozzle is 30-45, while height of the ledge is not less, than half of feed nozzle width. ^ EFFECT: upgraded operational characteristics. ^ 1 dwg

Novel adjustable bottom flow hydraulic cyclone

Abstract: The utility model relates to a novel adjustable bottom flow hydraulic cyclone, which solves the problems of bottom flow opening blockage, overflow coarse loss and low adaptability to the mineral pulp feeding change of the ordinary hydraulic cyclone. The utility model is characterized in that an upper body is made into a cylinder (2), the middle section is made into a conical body (4), the lower part is made into a bell-mouthed bottom flow section (5) with the symmetrical upper part and lower part, the upper body, the middle section and the lower part are connected for forming a cone bell-mouthed conical cylinder cyclone, the outer side of the cylinder (2) is provided with a feeding opening (1), the inner top of the cylinder (2) is provided with an outer upper cone inner cylinder overflow pipe (3), and a center bottom flow opening adjustable device (6) is arranged in a bell mouth of the bottom flow section (5). The utility model has the advantages that the overflow concentration and the coarse loss amount in the overflow can be reduced, the goal of stabilizing the bottom flow concentration can be reached, in addition, the bottom flow is not easy to be blocked, and the separation efficiency of the cyclone is improved. The utility model is suitable for realizing the solid-liquid separation operation such as grading, concentration, purification, mud removal and the like of solid granules.

Axial blower and air conditioner

Abstract: PROBLEM TO BE SOLVED: To provide an axial blower reducing noise and improving blast efficiency by effectively giving pre-rotation to air flowing into a blade leading edge side along a suction side diameter expansion part of a bell mouth, and provide an air conditioner using the axial blower. SOLUTION: This axial blower is a semi-open axial blower including an impeller 1 supporting a plurality of blades 11 at an outer circumference of a hub 12, and the bell mouth 2 having the impeller 1 disposed in an opening hole part 21. The opening hole part 21 of the bell mouth 2 includes a restriction part 22 including a section where a gap with an outer circumference edge of the impeller 11 becomes the minimum, and a suction side diameter expansion part 23 expanding diameter of a suction side of the restriction part 22. A guide part 31 giving pre-rotation in a direction same as a rotation direction of the impeller 1 to air current flowing along a surface of the suction side diameter expansion part 23 is formed at least in the suction side diameter expansion part 23. COPYRIGHT: (C)2011,JPO&INPIT

Multiblade fan and air conditioner equipped with the same

Abstract: PROBLEM TO BE SOLVED: To provide a multiblade fan or the like not giving a user unpleasant feeling by reducing noise and fan input. SOLUTION: A fan 6 having a plurality of blades 6a arranged on a circumference is held in a casing 2. A wind channel 5 for guiding air from a suction opening 3 to a blow-out opening 4 by rotation of the fan 6 is included between the casing 2 and the fan 6. A curved plate 8 larger than diameter of the fan 6 and substantially concentric with the fan 6 is provided in a wind channel in a counter-rotation direction of the fan 6 from a tongue part 2b near the blow-out opening 4 of the fan 6. A bell mouth 7 is provided toward an inner circumference wall of the fan 6 from an edge part of the suction opening 3. An annular hole 10 substantially concentric with the bell mouth 7 and having a diameter larger than the bell mouse 7 is provided at outer circumference thereof. COPYRIGHT: (C)2010,JPO&INPIT

Motorcycle oil-gas separator

Abstract: The invention discloses a motorcycle oil-gas separator. An oil vapor channel is arranged in the separator body; an inlet of the oil vapor channel is a bell mouth; the outlet of the oil vapor channel is connected with a carbon tank through an oil vapor vent pipe; a floater is arranged in the bell mouth; the position at the bell mouth and on the separator body is in threaded connection with a stopper, and the floater can float up and down between the bell mouth and the stopper; a through hole is arranged on the stopper; and the bottom of the floater is provided with a vent groove communicated with a through-hole The oil-gas separator of the invention is fixed on the top of an oil tank, oil vapor can smoothly passes the separator to enter into the carbon tank, the floater floats upwards immediately to block the channel once fuel enters into the separator, thus the fuel cannot pass through the channel. The oil-gas separator has simple manufacturing process and convenient and reliable fixed installation, can effectively separate oil and gas, and avoid the entering of the fuel to the carbon tank.

Heat source machine

Abstract: PROBLEM TO BE SOLVED: To provide a strong and inexpensive heat source machine not breaking or shaking a bell mouth during transportation or installation by providing a gripping part integrally with the bell mouth screwed to a casing. SOLUTION: The heat source machine is equipped with a heat exchanger installed in the heat source machine casing, a blower for sucking air from a back side suction part of the heat source machine via the heat exchanger and blowing it out from an outlet in a front side, the bell mouth screwed at the outlet of the inside of the heat source machine casing, and a blowout grill attached at the outlet of the outside of the heat source machine casing. COPYRIGHT: (C)2010,JPO&INPIT

Hand-operated breast pump

Abstract: The utility model relates to a breast pump, in particular to a hand-operated breast pump, which structurally comprises a body. A bell mouth is arranged in the front of the body, a cover is arranged atthe rear of the body, a milk outlet is connected below the body, a bell mouth accessory and a silica gel cover are respectively sleeved in the bell mouth, a dust proof cover is arranged on the outermost layer of the bell mouth, and the cover is equipped with an air suction hole. Compared with the prior art, the hand-operated beast pump has the advantages of reasonable design, simple structure, safe and convenient use, small stimulation to breasts and the like.

Air blast nozzle for laser cutting machines

Abstract: The utility model discloses an air blast nozzle for laser cutting machines, which comprises an air inlet (2), an air tap body (1) and an air outlet (3), wherein the air tap body has an initial section(1) and a conical contraction section (m). The an air blast nozzle for laser cutting machines is characterized in that the air inlet (2) is tangent to the inner cavity wall of the air tap body (1), the center line of the air inlet (2) and the horizontal line of the air tap body (1) form an included angle (a), and the air outlet (3) has a trumpet-shaped expansion section (d) which is communicatedwith the conical contraction section (m) through a transition section (n). The air blast nozzle with the structure can lead the airflow of the air inlet to speed up whirlingly along the inner cavity wall of the air tap body, and the airflow can be accelerated to supersonic speed after passing through the contraction section and a bell mouth, thus the air blast nozzle can be applied to laser cutting machines for the cutting of materials with large thickness, and the cutting speed and quality are also enhanced.

Pressing part of in-and-out cable leading-in device of explosion-proof electric apparatus housing

Abstract: The utility model relates to a pressing part of an in-and-out cable leading-in device of an explosion-proof electric apparatus housing, which is characterized in that the pressing part (1) comprises a cylindrical body (2) and a bell mouth (5) which is fixedly connected with one end of the cylindrical body (2) and has a smooth inner edge, wherein one end of the inner diameter r of the bell mouth (5), close to the cylindrical body (2), is equal to the inner diameter D of the cylindrical body (2), one end of the inner diameter of the bell mouth (5), far away from the cylindrical body (2), is R, and the ratio of the difference between R and r to the axial length L of the bell mouth (5) is 0.3-4:1. The pressing part can realize the low abrasion degree to the in-and-out cables of an explosion-proof electric apparatus and effectively protect the in-and-out cables of the explosion-proof electric apparatus.

Bell mouth for scroll case

Abstract: A bell mouth for a scroll case according to an exemplary embodiment of the present invention is a bell mouth which is provided on the top plate of the scroll case to form an air inlet in order to allow air flow into the scroll case by a centrifugal blower installed inside the scroll case, and the volume of two parts of the bell mouth in respect to a rotation shaft of the centrifugal blower is different from each other. According to the present invention, it is possible to minimize generation of reverse flow of inflow air by increasing or decreasing a variation of the cross-section area of the bell mouth according to an increase in the pressure of the flow rate.

Effects of bell mouth geometries to flow rate in centrifugal blower

Abstract: In this study, effect of bell mouth geometries to flow rate in centrifugal blowers were numerically simulated using a commercial CFD program, FLUENT. Total twelve numerical models were created by combining different value of bell mouth radius and gap between bell mouth and upper fan case (The cross surface of ball mouth was fixed to round shape in this research). All models were meshed with hexahedra elements using Gambit software. Frozen rotor method combined with Realizable k-spsilon turbulence model and non-equilibrium wall function was used to simulate the three-dimensional flow inside centrifugal blowers. The CFD investigation showed that the bell mouth radius had strong impact on flow rate, which can vary more than ten percent with different bell mouth models, while the effect of gap between bell mouth and upper fan case to flow rate was weaker. Base on CFD results, experiments have been carried out for typical bell mouth to verify the effect of bell mouth radius and gap between bell mouth and upper fan case to flow rate. The CFD results were thereafter validated owning to the good agreement between CFD results and experiment results.

Exhaust gas desulfurization absorption tower

Abstract: The utility model discloses an exhaust gas desulfurization absorption tower, which comprises a tower body. An exhaust gas outlet is arranged at the top part of the tower body; a slurry pool used for containing a desulphurization washing liquid is arranged at the bottom part of an inner cavity of the tower body; a washing liquid spray pipe transversely arranged inside the tower body is positioned below the exhaust gas outlet and communicated with the slurry pool through a recirculating pump; an exhaust gas inlet is arranged in the middle of the tower body and is positioned below the washing liquid spray pipe; following the downward vertical direction, at least part of the tower body adopts a structure of an outer expansion bell mouth with gradually increased ring diameters; and the exhaustgas inlet is arranged on the structure of the outer expansion bell mouth. The outer expansion bell mouth structural design adopted by the tower body eliminates the inlet inclination angle of the absorption tower, and changes an inclined exhaust gas inlet pipeline into a horizontal pipeline, thereby reducing the design difficulty, saving the material requirement of an engineering project, reducingthe pressure loss of an inlet section, and achieving the purposes of optimizing design methods and reducing the construction work cost and the operation energy consumption of the absorption tower.

Bell mouth structure of ductile cast-iron pipe

Abstract: The utility model relates to a bell mouth structure of a ductile cast-iron pipe with DN1800mm, wherein, the bell mouth structure comprises a bell mouth of the ductile cast-iron pipe and a rubber ring; the external diameter of a pipe body of the ductile cast-iron pipe is DN1800mm, a check ring is arranged inside the bell mouth end of the pipe body, and an external circular arc transits in a smooth manner; a first groove, a second groove and a third groove which are formed towards to the inner part of a wall continuously are formed on an inner wall inside the check ring; the first groove, the second groove and the third groove are in the shape of steps; the diameters of the first groove, the second groove and the third groove are decreased gradually; the rubber ring which is embedded in the first groove and the second groove comprises a hard seat and a soft head; the rubber ring is provided with a horn-shaped inner hole; an outer bulge ring is arranged on the hard seat and embedded in the first groove; and the soft head is provided with an outer cylindrical surface which is embedded in the second groove. The bell mouth structure solves the technical difficult problem that the ductile cast-iron pipe with the caliber greater than DN1600 cannot adopt a T-shaped interface.

Jet pump and nuclear reactor

Abstract: PROBLEM TO BE SOLVED: To provide a jet pump capable of shortening a time required for remodeling, and improving efficiency. SOLUTION: This jet pump 10 includes a nozzle 11, a bell mouth 12, a throat 13 including an upper throat 13A and a lower throat 13B, and a diffuser 17. The upper throat 13A is bonded to the lower end of the bell mouth 12. In the lower throat 13B, a fitting part 28 is formed on the upper end, and a channel enlargement part 14 and a tapered part 15 are provided on the lower end. The tapered part 15 is connected to the lower end of the channel enlargement part 14, and a channel area is reduced gradually toward the lower end. In the diffuser 17, a fitting part 18 is formed on the upper end. The tapered part 15 is fitted into the fitting part 18 of the diffuser 17. The upper end of the fitting part 18 has a contact with the whole periphery of the tapered part 15, and the lower throat 13B and the diffuser 17 are sealed. A slip joint 16 is provided on the throat 13. COPYRIGHT: (C)2010,JPO&INPIT

Inspection well with internal bell mouth and external bell mouth

Abstract: The utility model discloses an inspection well with an internal bell mouth and an external bell mouth. The inspection well comprises a well seat, a pit shaft and a launder, wherein, the pit shaft is arranged on the well seat; the launder and the well seat are integrated; the well seat is provided with pipeline bell mouths which are connected with a buried pipeline and are communicated with the launder; the pipeline bell mouths comprise the internal bell mouth and the external bell mouth communicated with the internal bell mouth; the length of the internal bell mouth is the same as that of theexternal bell mouth; the external bell mouth is positioned outside the well seat; and the internal bell mouth is positioned in the opening of the launder. The utility model which is mainly suitable for rain water bilge wells can solve the problems that the prior rain water bilge well adopting an external bell mouth is inconvenient for transportation and the cost of moulds is large; and the well has no impact on the blow-down effect or the cleaning of dregs in the launder.

Novel two-product heavy-medium cyclone

Abstract: The utility model provides a novel two-product heavy-medium cyclone, and solves the problems of a common hydraulic cyclone of underflow opening blockage, overflow, coarse-size coal particle leakage, and poor adaptability to change in ore slurry feeding. The novel two-product heavy-medium cyclone is characterized in that a cylinder (2) is arranged at the upper body of the heavy-medium cyclone, a cone (4) is arranged at the middle section thereof, and an underflow section (5) is arranged at the lower part thereof; the cylinder (2), the cone (4) and the underflow section (5) form a conical barrel-shaped cyclone with a cone-shaped bell mouth; the upper part and the lower part of the underflow section (5) are symmetrical; the underflow section (5) is provided with a bell mouth; a feed opening (1) is formed on the outer side of the cylinder (2); an adjustable device (6) provided with a central underflow opening is arranged in the bell mouth of the underflow section (5); and an overflow pipe (3) with two outer lower cones and an inner upper cone is arranged at the internal top of the cylinder (2). The utility model can improve the sorting accuracy of coal particles, reduces sorting low limit, serves pressure re-regulation function, and greatly improves the sorting effect of the cyclone, thereby being suitable for sorting and applying coal and other minerals according to densities.

Blower of on-vehicle refrigerating and air-conditioning unit

Abstract: PROBLEM TO BE SOLVED: To provide a blower of an on-vehicle refrigerating and air-conditioning unit capable of preventing deformation or breakage caused by the contact of a blower fan and a bell mouth while enhancing the blowing performance by setting a space between the blowing fan and the bell mouth to be an adequate value. SOLUTION: In the blower of the on-vehicle refrigerating and air-conditioning unit, an axial flow fan (propeller fan 10) is provided on an output shaft (motor shaft 6A) of a drive source (a sub engine 5, an electric motor 6) vibro-isolated on a frame 2, and a bell mouth 22 installed around the axial flow fan (propeller fan 10) is fixed to and supported by the frame 2 side. The bell mouth 22 is formed of an elastically deformable flexible material. COPYRIGHT: (C)2010,JPO&INPIT

Ventilation fan noise-reduction structure

Abstract: A ventilation fan noise-reduction structure is an open panel (120) fixed upon a scroll housing (110). The open panel (120) forms an annular semi-enclosed hollow structure in order to match the shape of an air inlet (140) on the scroll housing. The open panel (120) only covers the air inlet (140) area on the scroll housing. According to present invention，the noise generated by the ventilation fan may follow the guidance of a bell mouth of the ventilation fan scroll housing to be smoothly suctioned by the open panel and generated diffusion inside the open panel due to the repeated collision. Therefore the energy is damped step by step and the sound pressure is decreased.

Mounting structure of bell mouth, fixing structure of bell mouth and underground case, and mounting method of bell mouth on underground case

Abstract: PROBLEM TO BE SOLVED: To provide a bell mouth mounting structure having a bell mouth connected and a duct buried in advance, and allowing connection to an underground case such as a hand hole as required, while preventing entry of soil and sand or the like into the duct. SOLUTION: A protective tube 3 is a tube body into which a cable or the like is inserted. A resin tube having flexibility can be applied, for example. The bell mouth 7 is a cylindrical member, and is widened in a bell shape at one end. A joint 5 is a cylindrical member for inserting the protective tube 3 and the bell mouth 7. An end of the protective tube 3 is inserted and fixed at one end of the joint 7. The bell mouth 7 is inserted into the other end of the joint 5. Sealing members 9a, 9b are provided between the bell mouth 7 and the joint 5. The sealing member 9a is provided near the end of the joint 5 where the bell mouth 7 is inserted. The bell mouth 7 can be moved in an axial direction of the joint 5 with respect to the joint 5. COPYRIGHT: (C)2011,JPO&INPIT

An experimental investigation of flow field around bell mouth groin

Abstract: Groins are popular river training structures widely used all over the world including Bangla- desh. Groins have been used to create a flow condition that reduces the vulnerability of river bank erosion by diverting the flow away from the bank. Also groins have been used to increase the navigability of waterways. The flow structures around groin head play a very important role for their successful performance. Literature search reveals that bell mouth groins are relatively more popular in Bangladesh than other types of groins. But no systematic experiments have been conducted to study the flow pattern and flow behavior around bell mouth groins. Keeping this in view, a study was undertaken to investigate the flow field around bell mouth groin in a large mobile bed physical model facility (46m x 11 m) of BUET. A total number of 24 test runs were conducted. Three different discharges and four different angles and two groin conditions (submerged and non-submerged) was considered. Twelve tests were conducted for non-submerged conditions of which 6 (six) tests were with 14 cm depth and 6 (six) tests were with 18 cm depth. Similarly, another twelve tests were conducted with submerged condition of which 6 (six) had a water depth of 22 cm and the rest six with 26 cm depth. The top width of the shank of bell mouth groin was 12.5 cm and the bottom width was 32.5 cm. The height of groin above the bed surface was 20 cm and below the bed level was 40 cm. The top diameter at head of the groin was 15 cm and at base on the bed level was 35 cm. All tests were conducted for 8 hours duration in clear water condition. In order to avoid the ripple formation, the coarse sand with d50 = 0.75 mm was se- lected as bed material. Velocity data have been collected forming grids in both vertical and horizontal direc- tion around the vicinity of the bell mouth groin. Velocity was measured at 0.2, 0.4, 0.6 and 0.8 depths from the water surface by forming grids. For each grid 120 velocity measurements were taken, hence for 4-layers in one test run, 480 data on velocity have been collected with the help of a programmable electromagnetic ve- locity meter (P-EMS). Change in flow conditions around bell mouth groin for various test run have been ana- lyzed non-dimensionally in longitudinal, lateral and vertical direction. The study showed that for different groin arrangements the near bed velocity around the vicinity of bell mouth was reduced. In most of the cases, shifting away of maximum velocity was observed. Analysis of velocity contour also revealed this trend of shifting maximum velocity away from the bell mouth groin. In this paper the results of test runs conducted under submerged conditions for 150 0 and 90 0 angles are reported.

Air blower and ventilation fan

Abstract: PROBLEM TO BE SOLVED: To provide an air blower and a ventilation fan used to change air in a space of a house etc and capable of improving an air blowing capacity and reducing noise when static pressure is applied even if a step is formed in the vicinity of a suction bell mouth SOLUTION: The suction bell mouth 5 having a recess 10 is provided on a front panel 6 of a ventilation fan body 1 mounted with the front panel 6 including an upstream side step 8 and an oil reservoir 9 for collecting droplets The air blower comprises the suction bell mouth 5 and an axial flow impeller 3 By this configuration, the ventilation fan can facilitate maintenance, improve the air blowing capacity and reduce noise when static pressure is applied COPYRIGHT: (C)2010,JPO&INPIT