CN209988718U

CN209988718U - Fine powder conveying device

Info

Publication number: CN209988718U
Application number: CN201920558577.2U
Authority: CN
Inventors: 熊新; 张�浩
Original assignee: WUHAN TIANHE TECHNOLOGY Co Ltd
Current assignee: WUHAN TIANHE TECHNOLOGY Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-01-24
Anticipated expiration: 2029-04-23

Abstract

The utility model relates to a powder transport application, especially a fine powder conveyor, including feed bin, conveyer, blender and high-pressure gas system, conveyer is connected to the feed bin, and conveyer carries powder to blender, and the high-pressure gas system all communicates with feed bin, conveyer and blender for mixed powder, reinforcing powder flow ejection of compact and protection conveyor, its characterized in that: and a powder-gas mixing structure is arranged in the mixer. Through powder mixed structure's setting, the powder of being convenient for and gaseous misce bene improve the clearance between the powder to improve the mobility of powder, the ejection of compact of the powder of being convenient for, atmospheric pressure outside atmospheric pressure that atmospheric pressure in the blender is greater than the blender forms thrust, the further improvement of the powder discharging efficiency of being convenient for to powder ejection of compact process simultaneously.

Description

Fine powder conveying device

Technical Field

The utility model relates to a powder transport application, especially a fine powder conveyor.

Background

Powder transport refers to transferring powder to a location at a certain speed. Due to the nature of the powder: humidity, viscosity, fluidity, density, bulk density, granularity and the like are different, and the finer the powder is, the easier the powder is to agglomerate, and the poorer the fluidity is, so that the powder conveying process is not complete. Depending on the characteristics and requirements of powder transport, common powder transport devices are as follows:

the scraper feeder is characterized in that a fixed scraper is arranged on a powder tray, and the scraper scrapes powder accumulated on the powder tray into a hopper along with the rotation of the powder tray, so that the powder is required to have good fluidity and spherical shape and is not applicable to fine powder.

The screw type powder feeder drives powder to move along the spiral groove on the inner wall of the powder barrel by the rotation of the screw, and the mode can accurately control the powder feeding amount, but is not suitable for mixed powder with different specific gravities and powder with different granularity, and is easy to block the powder.

In the atomizing powder feeder, powder feeding gas is jetted from a nozzle with a small diameter at a high speed, and local low pressure generated by the powder feeding gas enables powder to be sucked into a powder outlet pipe. The powder feeding amount is realized by the distance between the air inlet pipe and the powder outlet pipe and the gas flow, the powder feeding device is suitable for powder with light specific gravity, and the powder feeding amount cannot be adjusted at will due to the fact that the gas flow cannot be adjusted at will.

And the vacuum conveyor forms a high negative pressure area in the pipeline through a vacuum pump, and the inlet material is sucked by the airflow and conveyed to the set position along with the airflow. The conveyor can only aim at powder with larger particles or granular materials, the powder is easy to block, and the flow rate is difficult to control.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of prior art, and provide a reinforcing powder flow, be convenient for powder transport and transport efficient fine powder conveyor.

The technical scheme of the utility model is that: the utility model provides a fine powder conveyor, includes feed bin, conveyer, blender and high-pressure gas system, and conveyer is connected to the feed bin, and conveyer carries powder to blender, and the high-pressure gas system all communicates with feed bin, conveyer and blender for mixed powder, reinforcing powder flow ejection of compact and protection conveyor, be equipped with powder gas mixed structure in the blender.

Further, powder gas mixed structure is multilayer structure, including the even net that flows that is used for the homodisperse air current, be used for the mixed net of powder gas mixture and be used for the even powder net of powder gas mixing, the mixed net is located even flow net and all between the powder net.

Furthermore, the flow equalizing net, the mixing net and the powder equalizing net are all provided with pulses.

Furthermore, the high-pressure gas system comprises an air inlet pipe and a three-way valve connected with the air inlet pipe, two ends of the three-way valve are respectively communicated with and control a first gas path and a second gas path, the first gas path is connected with a discharge hole of the mixer through a straight-through pipe, and the second gas path is respectively connected with the stock bin and the mixer through a gas transmission three-way pipe.

Furthermore, the three-way valve is connected with the gas transmission three-way through a gas transmission pipe, and the gas transmission three-way is communicated with the storage bin through a balance gas pipe.

Further, the top of the mixer is provided with a gas inlet joint, the inlet joint is connected with a gas transmission tee joint through a powder mixed gas pipe, the side face of the mixer is provided with a feed inlet communicated with the conveying device, the lower end of the mixer is provided with an outlet joint, and the outlet joint is connected with an outlet pipe of the mixer.

Further, a discharge port tee joint is arranged at the lower end of an outlet pipe of the mixer, one end of the discharge port tee joint is connected with a straight-through pipe, a check valve is arranged on the straight-through pipe, and the other end of the discharge port tee joint is connected with a discharge port and used for discharging.

Further, feed bin upper portion is equipped with air connector, air connector upper end and balanced trachea, and porous pipe is connected to the lower extreme, and the feed bin bottom is equipped with the relief hole, and conveyer is connected to the relief hole.

Further, the conveying device comprises a driving motor and a feeding barrel, and the feeding barrel is connected with the driving motor through a coupler; the feeding barrel is cylindrical, the tail part of the feeding barrel is sealed by a sealing cover, the front end of the feeding barrel is communicated with the mixer, a screw is arranged in the feeding barrel, the tail part of the screw is a screw shaft, and the screw shaft is connected with a driving motor through a key groove; the driving motor is provided with a motor main shaft, the motor main shaft is connected with the coupler, and the connector is connected with the key groove.

Further, the sealing cover is provided with a cylinder sealing groove, a cylinder O-shaped ring is placed in the groove, the screw shaft is arranged on a central hole of the sealing cover, a shaft sealing groove is arranged at the mounting part, and a shaft O-shaped ring is placed in the groove; the periphery of the screw is provided with spiral blades which are spirally distributed according to an angle of 10-60 degrees and a distance of 5-100 mm, and the diameter of the outer circle of each spiral blade is 0.2-0.3mm smaller than the inner diameter of the feeding barrel.

The utility model has the characteristics of as follows:

1. powder mixed structure's setting, the powder of being convenient for and gaseous misce bene improve the clearance between the powder to improve the mobility of powder, the ejection of compact of the powder of being convenient for, atmospheric pressure outside atmospheric pressure that atmospheric pressure in the blender is greater than the blender forms thrust to powder ejection of compact process simultaneously, the further improvement of the powder ejection of compact efficiency of being convenient for, the effectual stifled powder problem of having solved.

2. Under the condition that powder feeding is not needed, the three-way valve is communicated with the first air path, compressed air enters through the air inlet pipe and comes out of the discharge hole, and the compressed air can protect the whole device at the moment when the discharge hole is in a high-temperature environment or a high-pressure environment; under the condition that powder is thrown to needs, three-way valve intercommunication second gas circuit can make the powder keep loose state under the effect of compressed air pressure to the powder, increases the mobility of powder.

3. The setting of porous pipe in the feed bin makes the under-deck keep static malleation P1, can make the powder keep loose state under the effect of pressure to the powder, increases the mobility of powder, and material conveying pipeline internal gas pressure is P2, because multilayer net makes conveying pipeline have great pressure loss in the blender for P1 is greater than P2, guarantees that the powder can be pushed out smoothly, and the powder mobility of being convenient for increases.

4. The setting of screw rod is convenient for carry the powder, and the powder of being convenient for mixes with gas in the transportation process, and the mobility of reinforcing powder is convenient for the powder further and gas mix.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a sectional view of the fine powder feeder according to the present invention;

FIG. 2 is an enlarged view of the structure of the hopper and the mixer of the fine powder conveying apparatus of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

1-air inlet pipe, 2-three-way valve, 3-straight-through pipe, 4-check valve, 5-discharge port, 6-discharge port three-way, 7-mixer outlet pipe, 8-mixer, 9-feeding barrel, 10-screw, 11-driving motor, 12-coupler, 13-sealing cover, 14-storage bin, 15-powder mixing air pipe, 16-balance air pipe, 17-air conveying three-way, 18-air conveying pipe, 19-inlet joint, 20-uniform flow net, 21-mixing net, 22-uniform powder net, 23-outlet joint, 24-helical blade, 25-discharge hole, 26-shaft O-shaped ring, 27-shaft sealing groove, 28-screw 10 shaft, 29-motor main shaft, 30-cylinder sealing groove, 31-cylinder O-shaped ring, 32-porous pipe and 33-storage bin air inlet joint.

Detailed Description

As shown in fig. 1-3: the utility model provides a fine powder conveyor, includes feed bin 14, conveyer, blender 8 and high-pressure gas system, and conveyer is connected to feed bin 14, and conveyer carries powder to blender 8, and the high-pressure gas system all communicates with feed bin 14, conveyer and blender 8 for mix powder, reinforcing powder flow ejection of compact and protection conveyer, be equipped with powder gas mixed structure in the blender 8.

The powder-gas mixing structure is of a multilayer structure and comprises a flow equalizing net 20 for uniformly dispersing airflow, a mixing net 21 for mixing powder and gas and a powder equalizing net 22 for uniformly mixing powder and gas, the mixing net 21 is positioned between the flow equalizing net 20 and the powder equalizing net 22, the flow equalizing net 20 is arranged to facilitate the balance of pressure between the storage bin 14 and the mixer 8, facilitate the conveying of powder in the conveying device into the mixer 8, facilitate the improvement of conveying efficiency and simultaneously facilitate the blocking of upward flow of powder in the mixer 8; the powder-gas mixing structure is convenient for uniformly mixing the powder and the gas, and the flowability of the powder is convenient to improve.

Equal flow net 20, mixing net 21 and equal powder net 22 all are equipped with the pulse, and the setting of pulse is convenient for reduce the overstock of powder on each net, prevents simultaneously that the powder of overstock from causing the jam to the net, and the powder of being convenient for simultaneously and gas mixture are even.

Powder gas mixed structure can also adopt inside cavity has the agitator of gas pocket (not shown), can strengthen the mixture of powder and gas when stirring, is convenient for strengthen the flow of gas in the powder, further strengthens the mixture of powder and gas and the mobility of powder, and the upper end of agitator is equipped with porous screen cloth, and the aperture is less than the particle diameter of powder, is convenient for feed bin 14 and the balance of the pressure in the blender 8, is convenient for simultaneously to block the powder in the blender 8 and upwards flows.

The high-pressure gas system comprises a gas inlet pipe 1 and a three-way valve 2 connected with the gas inlet pipe 1, wherein the gas inlet pipe 1 is connected with a compressed air source, the pressure of compressed air is greater than 5000Pa, and the flow rate is 20L/min-5000L/min; two ends of the three-way valve 2 are respectively communicated and control the first gas path and the second gas path, and the gas inlet pipe 1 can only be communicated with one of the two paths under the control of the three-way valve; the first gas path is connected with a discharge port 5 of a mixer 8 through a straight-through pipe 3, and the second gas path is respectively connected with a storage bin 14 and the mixer 8 through a gas transmission tee 17.

The three-way valve 2 is connected with a gas transmission three-way 17 through a gas transmission pipe 18, and the gas transmission three-way 17 is communicated with the storage bin 14 through a balance gas pipe 16.

The top of the mixer 8 is provided with a gas inlet joint 19, the inlet joint 19 is connected with a gas transmission tee joint 17 through a powder mixed gas pipe 15, the side surface of the mixer 8 is provided with a feed inlet communicated with a conveying device, the lower end of the mixer 8 is provided with an outlet joint 23, and the outlet joint 23 is connected with a mixer outlet pipe 7.

The lower end of the outlet pipe of the mixer 8 is provided with a discharge port tee 6, one end of the discharge port tee 6 is connected with a straight-through pipe 3, the straight-through pipe 3 is provided with a check valve 4, and only airflow flows to the outlet direction through an inlet; the other end is connected with a discharge port 5 for discharging.

An air inlet joint is arranged at the upper part of the storage bin 14, the upper end of the air inlet joint is connected with the balance air pipe 16, the lower end of the air inlet joint is connected with the porous pipe 32, and after the storage bin 14 is loaded, the porous pipe 32 is positioned in the powder, so that compressed air is conveniently distributed at each corner in the storage bin 14, and the air pressure in the storage bin 14 is kept balanced; the bottom of the bin 14 is provided with a discharge hole 25, and the discharge hole 25 is connected with a conveying device.

The conveying device comprises a driving motor 11 and a feeding barrel 9, and the feeding barrel 9 is connected with the driving motor 11 through a coupler 12; the feeding cylinder 9 is cylindrical, the tail part of the feeding cylinder is sealed by a sealing cover 13, the front end of the feeding cylinder is communicated with the mixer 8, and one end of the feeding cylinder 9 close to the tail part is communicated with a discharge hole 25; a screw 10 is arranged in the feeding barrel 9, a screw 10 shaft 28 is arranged at the tail part of the screw 10, and the screw 10 shaft 28 is connected with the driving motor 11 through a key groove; the driving motor 11 is provided with a motor spindle 29, the motor spindle 29 is connected with the coupler 12, the connector is connected with the key slot, the driving motor 11 drives the motor spindle 29 to move, and the motor spindle 29 drives the coupler 12 to move simultaneously with the screw 10.

The sealing cover 13 is provided with a cylinder sealing groove 30, a cylinder O-shaped ring 31 is placed in the groove, the shaft 28 of the screw 10 is arranged on the central hole of the sealing cover 13, the mounting part is provided with a shaft sealing groove 27, and the shaft O-shaped ring 26 is placed in the groove; the periphery of the screw 10 is provided with a spiral blade 24, the spiral blade 24 is spirally distributed according to an angle of 10 degrees to 60 degrees and a distance of 5mm to 100mm, and the diameter of the outer circle of the spiral blade 24 is 0.2 mm to 0.3mm smaller than the inner diameter of the feeding barrel 9.

The utility model discloses a theory of operation and application method are:

under the condition that powder feeding is not needed, a three-way valve 2 connected with an air inlet pipe 1 is firstly opened to a straight-through pipe 3, and a first air passage is communicated; compressed air enters through the air inlet pipe 1 and comes out from the discharge hole 5. When the discharge port 5 is in a high-temperature environment or a high-pressure environment, the compressed air can protect the whole device.

Under the condition that powder needs to be thrown, the three-way valve 2 connected with the air inlet pipe 1 is firstly opened to the conveying air pipe 18, so that the second air path is communicated, the air flow of the second air path is divided by the air conveying three-way valve 17, and an air path communicated with the storage bin 14 and an air path communicated with the mixer 8 are formed. The air path communicated with the storage bin 14 is that a balance air pipe 16 of the storage bin 14 enters the storage bin 14 through a storage bin air inlet joint 33, the interior of the storage bin is kept at static positive pressure P1 under the action of a porous pipe 32, powder can be kept in a loose state under the action of pressure, and the flowability of the powder is increased; the gas path communicated with the mixer 8 is a powder mixing gas tube 15 connected to the mixer 8, so that the mixer 8 keeps a gas flow passing through. The power of the motor is switched on, a certain speed is controlled to enable the motor to keep rotating at a constant speed, the motor shaft drives the screw rod 10 to rotate in the feeding barrel 9 through the coupler 12, powder in the bin 14 reaches the feeding barrel 9 through the discharge hole 25, the screw rod 10 is submerged, the powder is pushed to move towards the mixer 8 through the spiral blades 24 along with the rotation of the screw rod 10, and the powder continuously enters the feeding barrel 9 through the discharge hole 25 under the action of gravity along with the increase of the holes of subsequent powder. During the powder gets into blender 8, the air current through flow equalizing net 20 mixes on mixing net 21 after meeting with the powder that gets into in the blender 8 at the uniform velocity, and powder and air current after the mixture carry out the mixing through powder equalizing net 22, and the gas-powder mixture after the mixing enters into blender outlet pipe 7 after connecting the output, discharges from discharge gate 5 along discharge gate tee bend 6, and the completion is to the transport of powder.

The air pressure in the material conveying pipeline is P2, and the conveying pipeline has larger pressure loss due to the multilayer net in the mixer 8, so that P1 is larger than P2. This ensures that the powder can be smoothly pushed out and the powder flowability is increased. Finally, the powder enters the mixer 8 under the drive of the uniform screw 10 to be fully mixed with the air flow to form a gas-solid two-phase flow, which is not restricted by the shape of the pipeline and the environment condition of the conveying end point position, and the high-speed powder conveying is carried out.

The preferred embodiments of the present invention have been described in detail above, but it is apparent that the present invention is not limited to the above embodiments. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple equivalent variant, and these equivalent variants all belong to the utility model discloses a protection scope. In addition, it should be noted that the technical features described in the above embodiments may be separately and independently combined as long as they are within the technical concept of the present invention.

Claims

1. The utility model provides a fine powder conveyor, includes feed bin, conveyer, blender and high-pressure gas system, and conveyer is connected to the feed bin, and conveyer carries powder to blender, and the high-pressure gas system all communicates with feed bin, conveyer and blender for the mixed powder, reinforcing powder flow ejection of compact and protection conveyor, its characterized in that: a powder-gas mixing structure is arranged in the mixer; the powder-gas mixing structure is of a multilayer structure and comprises a flow-equalizing net for uniformly dispersing airflow, a mixing net for mixing powder gas and a powder-equalizing net for uniformly mixing powder gas, wherein the mixing net is positioned between the flow-equalizing net and the powder-equalizing net.

2. The fine powder conveying apparatus according to claim 1, wherein: the flow equalizing net, the mixing net and the powder equalizing net are all provided with pulses.

3. The fine powder conveying apparatus according to claim 1, wherein: the high-pressure gas system comprises an air inlet pipe and a three-way valve connected with the air inlet pipe, two ends of the three-way valve are respectively communicated with and control a first gas path and a second gas path, the first gas path is connected with a discharge hole of the mixer through a straight-through pipe, and the second gas path is respectively connected with the stock bin and the mixer through a gas transmission three-way pipe.

4. The fine powder conveying apparatus according to claim 3, wherein: the three-way valve is connected with the gas transmission three-way through a gas transmission pipe, and the gas transmission three-way is communicated with the storage bin through a balance gas pipe.

5. The fine powder conveying apparatus according to claim 1, wherein: the top of the mixer is provided with a gas inlet joint, the inlet joint is connected with a gas transmission tee joint through a powder mixed gas pipe, the side of the mixer is provided with a feed inlet communicated with the conveying device, the lower end of the mixer is provided with an outlet joint, and the outlet joint is connected with an outlet pipe of the mixer.

6. The fine powder conveying apparatus according to claim 5, wherein: the lower end of the outlet pipe of the mixer is provided with a discharge port tee joint, one end of the discharge port tee joint is connected with a straight-through pipe, a check valve is arranged on the straight-through pipe, and the other end of the straight-through pipe is connected with a discharge port for discharging.

7. The fine powder conveying apparatus according to claim 1, wherein: the upper part of the storage bin is provided with an air inlet connector, the upper end of the air inlet connector is connected with the balance air pipe, the lower end of the air inlet connector is connected with the perforated pipe, the bottom of the storage bin is provided with a discharge hole, and the discharge hole is connected with the conveying device.

8. The fine powder conveying apparatus according to claim 1, wherein: the conveying device comprises a driving motor and a feeding barrel, and the feeding barrel is connected with the driving motor through a coupler; the feeding barrel is cylindrical, the tail part of the feeding barrel is sealed by a sealing cover, the front end of the feeding barrel is communicated with the mixer, a screw is arranged in the feeding barrel, the tail part of the screw is a screw shaft, and the screw shaft is connected with a driving motor through a key groove; the driving motor is provided with a motor main shaft, the motor main shaft is connected with the coupler, and the connector is connected with the key groove.

9. The fine powder conveying apparatus according to claim 8, wherein: the sealing cover is provided with a cylinder sealing groove, a cylinder O-shaped ring is placed in the groove, the screw shaft is arranged on a central hole of the sealing cover, a shaft sealing groove is arranged at the mounting position, and a shaft O-shaped ring is placed in the groove; the periphery of the screw is provided with spiral blades, the spiral blades are spirally distributed according to an angle of 10-60 degrees and a distance of 5-100 mm, and the diameter of the outer circle of each spiral blade is 0.2-0.3mm smaller than the inner diameter of the feeding barrel.