KR20210066331A - Powder conveying system - Google Patents

Abstract

The present invention relates to a powder conveying system, wherein when transferring the powder discharged from a hopper scale or hopper to the mixer, it is configured so that the entire amount is transferred without scattering or loss (without waste or loss), thereby preventing fluctuations in the mixing composition of the powder and poor quality and preventing surrounding contamination. The structure does not penetrate into the worker's respiratory tract, the same transports powder in an environmentally friendly way. The system comprises: a hopper (2) from which powder (1) is discharged; a mixer (8) which is installed spaced apart from the bottom of the hopper (2) and provided with a mixing chamber (6) and an entrance (7); and a discharge guide (25) installed between the hopper (2) and the mixer (8) and raised and lowered by a plurality of lifting cylinders (23) and (24). The discharge guide (25) comprises: an inclined surface formed on the lower outer periphery of the hopper (2), and a support tube (26) having an upper portion fixed to the inclined surface and surrounding the hopper discharge tube (3); an O-ring (28) installed on the upper outer periphery of the support pipe (26); an O-ring (28) sealed pipe (29) coupled to the outer periphery; a circular plate (32) fixed to the lower end of the closed pipe (29) and having a through-hole (31) having a larger inner diameter than the discharge pipe (3) in the center; rods (33, 34) of a plurality of lifting cylinders fixed to the upper surface of the circular plate (32); and a ring-shaped packing (36) having a through hole (35) formed in the center and fixed to the bottom surface of the round plate (32).

Description

Powder conveying system {Powder conveying system}

The present invention relates to a powder conveying system, and when conveying the powder discharged from the hopper scale or the hopper to the mixer, the entire amount is transferred without scattering or loss (without waste or loss), so that the content is insufficient or quality due to fluctuations in the mixing composition ratio of the powder It is designed to achieve environmentally friendly powder transfer, such as preventing defects, preventing surrounding contamination, and preventing powder from penetrating into the worker's respiratory tract.

In general, an operation for filling the fine powder with a set capacity or a predetermined capacity in a specific container is one of the operations widely adopted in various industrial fields.

For example, manufacturing pharmaceuticals in which various powders (or powders or particles) are weighed in appropriate proportions and then mixed to make tablets (or unrefined), or filling cartridge containers with fine powdered toner used in copiers or printers. And there are countless others to list.

On the other hand, a mixer (Mixer) is a device that homogeneously mixes powders, which are various raw materials used in industrial sites, and includes a ball mill, a double cone mixer, a blender mixer, and a V-mixer. For example, at least one or more types of powders are weighed in a predetermined composition ratio (composition ratio) according to the component ratio, put into the mixer, mixed so as to be uniformly distributed, and then processed or commercialized (commercialized) through a post process. do. Therefore, it is preferable to transfer to the post-process in a state where the accurate and standardized mixing ratio is maintained as it does not affect the efficacy or quality of the product, such as insufficient content.

1 illustrates a conventional powder transport system, a hopper 2 into which the powder 1 to be mixed is put is installed at the upper portion, and a discharge pipe 3 of a predetermined inner diameter is configured at the lower end of the hopper 2, and a discharge pipe ( At one end of 3), a discharge valve 4 for opening and closing the discharge pipe 3 and a valve driving unit 5 are installed, and the powder 1a discharged from the hopper 2 is transferred (supplied) to the lower portion of the hopper 2 A mixer 8 having a mixing chamber 6 and an inlet 7 of a predetermined volume is installed to receive and mix, and a sealing valve for opening and closing the inlet 7 is provided at the outlet 7 of the mixer 8 ( 9) and the valve driving part 10 are installed, and both shaft rods 11 and 12 of the mixer 8 are shaft-installed as shaft supports 11a and 12a on both side supports 13 and 14, and one side support. At 14, a driving means 15 for rotating the shaft 12 of the mixer 8 is installed to mix the powder 1b moved (or dropped into) into the mixer 8 .

Figure 2 illustrates the process of introducing the weighed powder (1) into the mixer (8), and the sealing valve (9) installed in the inlet (7) of the mixer (8) is opened using the valve driving part (10). , when the sealing valve 9 installed in the discharge pipe 3 is opened and opened using the valve driving unit 5, the powder 1 of the hopper 2 passes through the discharge pipe 3 and the inlet 7 to the mixing chamber 6 It is conveyed to the mixer (8) by pouring down (falling down) inside.

In this process, the falling powder 1a discharged from the upper (higher) hopper 2 is poured down (falling down) into the doorway 7 while strongly colliding with the bottom surface 16 of the mixing chamber 6 Not only is it scattered, but some of the powder 1c is scattered outside the mixer 8 through the gap 17 by a vortex (or tornado) generated while the powder 1a interacts with the surrounding air when it is poured down and pollutes the surroundings. As well as the loss of the powder 1, as well as a phenomenon in which the composition ratio of the mixed powder 1b fluctuates, there is a problem in that the quality of the product is deteriorated and defective products with insufficient content are mass-produced.

In addition, some of the powder 1c scattered outside the mixer 8 is treated as harmful dust, such as polluting the surrounding space and floor, penetrating into the respiratory tract of the worker and damaging the health.

On the other hand, as a method for collecting the dust, a dust collecting cover 18 is installed on the upper part of the mixer 8 as shown in FIG. 3 to collect the scattered powder 1c, and the dust collecting cover 18 has an intake pipe 19 ) and the dust collection facility 20 to collect the collected powder (1d) to prevent contamination of the surrounding space and prevent it from penetrating into the worker's respiratory tract, but the loss (loss) of the precisely measured powder (1) is not prevented. As the composition ratio of the mixed powder 1b fluctuates, there is a problem such as mass production of defective products with insufficient content.

Therefore, it is possible to collect the scattered dust and then measure it and recalculate the composition ratio to verify whether it is within the allowable composition ratio range, but there is a problem in that a lot of cost and time are incurred.

In addition, some powders are in the form of particles (or powder particles) of a fine size (size around 10 microns) and are easily scattered. It has a huge impact on product quality because it is lost.

The scattering powder 1c is in a fine dust state and becomes fine dust when leaked to the outside, polluting the surroundings and harmful to the human body, and even if it is collected using the dust collection facility 20, it is classified as hazardous waste and requires separate management. There were several problems such as incurring a lot of time and money for maintenance.

Republic of Korea Patent Publication No. 10-1647090 (Title of the invention: raw material mixing device, 2016. 08. 09. Patent announcement) Republic of Korea Patent Publication No. 10-2016-0135536 (Title of the invention: raw material mixing device, 2016. 11. 28. Patent publication) Republic of Korea Patent Publication No. 10-2005-0047778 (Title of the invention: toner refilling device, 2005. 05. 23. Patent publication)

The present invention is configured so that the entire amount is transferred without scattering or loss when transferring the powder discharged from the hopper scale or hopper to the mixer, thereby preventing insufficient content or poor quality due to fluctuations in the mixing composition ratio of the powder. An object of the present invention is to provide a powder conveying system in which the powder does not penetrate into the furnace and the powder is transported in an environmentally friendly manner.

The present invention is configured to transfer (move) the entire amount without scattering or loss when transferring the powder discharged from the hopper scale or hopper to the mixer, thereby preventing fluctuations in the mixing composition ratio and poor quality, and inhaling surrounding contamination and worker's respiratory tract It is configured to achieve environmentally friendly powder transfer.

The powder conveying system of the present invention includes a hopper through which powder is discharged, a mixer installed spaced apart from the lower hopper and provided with a mixing chamber and an entrance, and a discharge guide installed between the hopper and the mixer and ascending and descending by a lifting cylinder, The discharge guide includes an inclined surface formed on the lower outer periphery of the hopper, a support tube having an upper portion fixed to the inclined surface and surrounding the hopper discharge tube, an O-ring installed on the outer periphery of the support tube, and a seal coupled to the O-ring outer periphery A tube, a round plate fixed to the lower end of the sealed tube and having a through hole having an inner diameter larger than that of the discharge tube in the center, a rod of a plurality of lifting cylinders fixed to the upper surface of the round plate, and a through hole formed in the center and on the bottom surface of the round plate It includes a fixed ring-shaped packing.

It further includes an intake pipe and a vacuum pump having an on/off valve connected to one side of the closed pipe.

It further includes a coupling groove formed on the upper inner periphery of the sealing tube and coupled to the outer periphery of the O-ring.

It is installed on the flange surface of the mixer and further includes a packing having a through hole in the center.

The hopper may be a hopper scale.

It further includes a discharge pipe having a predetermined inner diameter installed at the lower end of the hopper, a discharge valve installed at one end of the discharge pipe to open and close the discharge pipe, and a valve driving unit for driving the discharge valve.

a sealing valve for opening and closing the inlet of the mixer; and a valve driving unit for driving the sealing valve, a support for supporting both shaft shafts of the mixer, respectively, and driving means for rotating the shaft shaft of the mixer.

The powder may be any one of a powder, a fine powder, a colloid, a fine powder, a normal powder, a coarse powder, and a solid.

In the present invention, when transferring the powder (1) discharged from the hopper scale or hopper (2) to the mixer (8), the entire amount is transferred without scattering or loss at all, so there is no change in the mixing composition ratio of the powder and quality defects are prevented, In addition, there is an effect of preventing environmental pollution and not penetrating into the worker's respiratory tract, thereby providing an environmentally friendly powder transfer.

The present invention prevents the scattering and loss of the powder at the initial stage when the powder 1 is discharged by isolating it from the outside air or vacuuming it to block the contact with the air, and after the initial discharge, it can be discharged at a non-scattering speed. There is an effect that the powder composition ratio does not fluctuate because generation and scattering of the powder are prevented.

In the present invention, the powder 1 filled in the hopper 2 in a state in which the interior 45 and the mixing chamber 6 of the discharge guide 25 are depressurized or maintained in a vacuum state using the vacuum pump 44 is Since it naturally moves to the mixing chamber (6) by the pressure difference without resistance or stress, the phenomenon and loss of the powder (1) is prevented from scattering around or to the workplace space, the sanitary safety of workers is ensured, and the powder is mechanically It is a very useful invention that has the effect of stably moving and mixing a fixed amount of powder to the mixer 8 without applying stress.

1 : A block diagram of a conventional powder conveying system.
Figure 2: A state diagram of the use of a conventional powder conveying system.
Figure 3: Another state of use of the conventional powder conveying system.
Figure 4: A cross-sectional configuration diagram of the present invention powder conveying system.
Figure 5: A partial plan view of the mixer of the present invention.
Figure 6: A plan cross-sectional view of a state in which the discharge valve is closed in the present invention.
Figure 7: A plan cross-sectional view of the state in which the discharge valve is opened in the present invention.
Figure 8: A cross-sectional view of a state in which the inside of the discharge guide and the mixing chamber are exhausted before the powder is discharged in the present invention.
Figure 9: Exemplary cross-sectional view of the state of discharging the powder in the present invention.
Figure 10: a cross-sectional view of the state of discharging the powder in the present invention.
Figure 11: A cross-sectional view of a state of discharging the mixed powder by rotating the mixer in the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiments of the present invention, the same components in the drawings are denoted by the same reference numerals as much as possible, and detailed descriptions of related known configurations or functions are omitted so as not to obscure the gist of the present invention, and also in the accompanying drawings Matters expressed in may be different from those actually implemented in the schematic drawings for easy explanation of the embodiments of the present invention.

For convenience of explanation in the present invention, a powder (粉体, Pulverulent Body) exemplified as an object to be transported and mixed is an object (solid particle aggregate) in which a large number of solid particles are aggregated, and is divided according to the size of the particles forming it. That is, 0.1 μm or less is classified as colloid, 0.1 to 1 μm is fine powder, 1 to 100 μm is normal powder, 0.1 to 1 mm is coarse powder, and 1 mm or more is three-dimensional. Generally treated as powder, it ranges from fine powder to coarse powder, that is, an aggregate of solid materials with a particle diameter of 0.1 μm to 1 mm, and examples include pharmaceutical raw materials, grains, powdered metals and non-metals.

4 is a block diagram of the powder conveying system 21 shown as an example of the present invention, FIG. 5 is a partial plan view of the mixer 8, FIG. 6 is a plan cross-sectional view of a state in which the discharge valve 4 is closed, FIG. 7 is a flat cross-sectional view with the discharge valve (4) open, a hopper scale or hopper (2) for supplying at least one powder to be mixed (1), and a hopper (2) installed spaced apart under the double cone mixer, blender Discharge guide of a sealed structure that is raised and lowered by the mixer 8 composed of a mixer, etc., and the lifting cylinders 23 and 24 installed between the hopper 2 and the mixer 8 and arranged in pairs or two to four. contains a sphere (25).

A discharge pipe 3 having a predetermined inner diameter is installed at the lower end of the hopper 2, and at one end of the discharge pipe 3, a discharge valve 4 for opening and closing the discharge pipe 3 and a valve driving unit for driving the discharge valve 4 ( 5) is installed, and the mixer 8 installed under the hopper 2 receives (supply) the powder 1a discharged from the hopper 2 and mixes it with a predetermined volume of the mixing chamber 6 and the entrance (7) is provided.

A sealing valve 9 for opening and closing the entrance and exit 7 and a valve driving part 10 for driving the sealing valve 9 are installed at the entrance 7 of the mixer 8, and both shaft rods of the mixer 8 ( 11 and 12 are shafts installed as shaft supports 11a and 12a on both supports 13 and 14, respectively, and on one support 14, a driving means for rotating the shaft 12 of the mixer 8 (15) is installed so as to be able to mix the powder (1b) moved to the mixer (8) (or drop input).

The sealing valve 9 and the valve driving part 10 installed at the entrance 7 of the mixer 8 are the entrance 7 between the mixing, storage, or movement of the powder 1b falling into the mixing chamber 6 It is sealed so that it does not leak to the outside of the mixer 8 through the .

In the case of the hopper (2), the weighed powder (1) is input, and in the case of a hopper scale having a weighing function, the input powder (1) is measured.

The valve actuators 5 and 10 may be electric cylinders, air cylinders, hydraulic cylinders, pre-rotation cylinders, servo mechanisms, and the like. The valve actuators 5 and 10 are fixed to a base, a frame, or the like.

The discharge guide 25 includes an inclined surface 26 formed on the lower outer periphery of the hopper 2, and a downwardly protruding support tube having an upper portion fixed to the inclined surface 26 and surrounding the hopper discharge tube 3 ( 27), an O-ring 28 fitted to the upper outer periphery of the support pipe 27, and a coupling groove 30 formed in the upper inner periphery of the sealing pipe 29 coupled to the outer periphery of the O-ring 28. And, a circular plate 32 fixed to the lower end of the sealed pipe 29 in an airtight manner and having a through hole 31 having a larger inner diameter than the discharge pipe 3 in the center, and a circular plate 32 to elevate the sealed pipe 29 ) of the rods 33 and 34 of the plurality of lifting cylinders 23 and 24 fixed to the upper surfaces of both sides of the ring-type packing having a through hole 35 formed in the center and fixed to the bottom surface of the circular plate 32 ( 36), and when the sealing tube 29 is lowered by the elevating cylinders 23 and 24, the packing 36 is a flange surface 37 formed at the entrance 7 of the mixer 8 as shown in FIG. 10. As it is in close contact with the outside, airtightness is maintained.

The elevating cylinders 23 and 24 are fixed to a base or a frame, and rods 33 and 34 protrude and retract.

By separately fixing and installing a ring-shaped packing 39 having a through hole 38 formed thereon as shown in FIGS. 4, 5, 8, and 9 on the upper surface or surface of the flange surface 37, so that the packing 36 is in close contact. The sealing force can be further increased.

An intake pipe 42 having an on/off valve 41 and a vacuum pump 44 are connected to one side connection portion 40 of the sealing tube 29 to vacuum the interior 45 of the discharge guide 25 . do.

The manipulation unit 41a of the on/off valve 41 may be an actuator controlled by a controller or a manually operated knob.

The upper part of the hopper (2) is of an open type so that the weighing powder (1) can be put in, and the discharge valve (4) installed at the outlet (3) of the hopper (2) is a ball valve, a rotary plate, a flat slide plate, a swash plate, etc. can be

The present invention isolates or vacuums the powder (1) discharged from the hopper scale or hopper (2) so that it does not scatter in the discharge process to block contact with external air, thereby preventing vortex flow, and scattering and loss of powder (1) This is prevented so that it is introduced into the mixer 8 without changing the composition ratio to obtain a homogeneous mixed powder uniformly mixed.

The present invention scatters when the powder (1) of the hopper (2) is discharged is because the discharged powder (1a) is diffused and discharged while in contact with the external air, therefore, the powder (1) is initially discharged with the outside air and The powder composition ratio does not fluctuate by isolating or vacuuming to prevent contact with air, and then discharge at a non-scattering speed after initial discharge to prevent dust generation or scattering of powder.

In the present invention, the powder 1 discharged from the hopper 2 is prevented from contacting with air until it reaches the mixing chamber 6, so that loss (loss) or scattering of the powder 1 is prevented.

That is, before discharging the powder 1 contained in the hopper 2 as shown in FIG. 8 (the discharge valve 4 is closed), the sealing tube 29 is lowered using the lifting cylinders 23 and 24. The ring-shaped packing 36 fixed to the bottom surface of the round plate 32 is in close contact with the flange surface 37 when there is no ring-shaped packing 39 or ring-shaped packing 39 fixed to the inlet 7 of the mixer 8. The interior 45 of the discharge guide 25 is sealed, and when the sealing valve 9 is opened with the valve actuator 10, the interior 45 of the discharge guide 25 and the mixing chamber 6 are closed. It communicates and is isolated from the outside.

The ring-shaped packings 36 and 39 have through holes 35 and 38 formed, respectively, and since the sealing valve 9 is in an open state, the interior 45 of the discharge guide 25 and the mixing chamber 6 are communicate

An O-ring 28 is coupled between the sealing tube 29 and the support tube 26 so that even if the sealing tube 29 is raised or lowered by the lifting cylinders 23 and 24, the sealing tube 29 and the support tube The airtightness between (26) is maintained.

The outer periphery of the O-ring 28 is coupled to the coupling groove 30 formed on the upper inner periphery of the sealing tube 29 so that the O-ring 28 is maintained in position even when the sealing tube 29 moves up and down.

As described above, the opening/closing valve 41 is opened and the vacuum pump 44 is operated while the inside 45 and the mixing chamber 6 of the discharge guide 25 are closed by the lowering of the discharge guide 25 as described above. When this is done, the air remaining in the interior 45 of the discharge guide 25 and the mixing chamber 6 is exhausted through the connection part 40 and the intake pipe 42 and is mixed with the interior 45 of the discharge guide 25 . The seal 6 is depressurized or brought to a vacuum state. The degree of pressure reduction and the degree of vacuum can achieve arbitrary pressure reduction or vacuum by controlling the vacuum pump 44 .

The vacuum degree of the interior 45 and/or the mixing chamber 6 of the discharge guide 25 is about 50 to 450 mmHg, and the reduced pressure (atmospheric pressure lower than atmospheric pressure) required by using a small vacuum pump 44 or The degree of vacuum can be easily achieved.

The degree of vacuum is appropriately adjusted in consideration of the volume (or volume) of the mixed powder 1b flowing into the mixing chamber 6 . For example, when the volume (or volume) of the mixed powder 1b flowing into the mixing chamber 6 is 1/2, the vacuum degree of the mixing chamber 6 is atmospheric pressure (760 mmHg) in consideration of the volume occupied by the mixed powder 1b. It becomes 380 mmHg, which is 1/2 of the standard), and the pressure can be reduced to 10 to 20% less atmospheric pressure than the volume of the mixed powder 1b, for example, 342 to 304 mmHg.

The inside 45 and the mixing chamber 6 of the discharge guide 25 close the on/off valve 41 in a state where the pressure reduction or vacuum is maintained, so that the interior 45 of the discharge guide 25 and the mixing chamber ( 6) When the discharge valve 4 is opened using the valve driving unit 5 in the state of maintaining the pressure reduction and vacuum conditions of 6), the powder 1 of the hopper 2 weighed in is reduced by its own weight, gravity, pressure difference, vacuum, etc. After passing the discharge pipe 3 and the inlet 7, it is dropped into the mixing chamber 6, and when the entire amount of the powder 1 of the hopper 2 is put in, the discharge valve 4 is closed using the valve driving unit 5. do.

At this time, the powder 1a dropped and discharged is naturally poured (falling) into the mixing chamber 6 by the pressure difference without resistance or stress while passing the discharge guide 25 and the entrance 7 in the reduced pressure and/or vacuum state. Therefore, the phenomenon that the powder (1) is scattered around or to the workplace space or its loss (loss) is prevented, the hygiene and safety of the worker is ensured, and the falling powder (1) is quantitative without a phenomenon that mechanical stress is applied. of the powder moves stably to the mixer 8 and can be mixed.

In the initial stage when the powder 1 is discharged by isolating it from the outside air using the discharge guide 25 and the vacuum pump 44 or blocking the contact with the outside air by decompression and/or vacuum, the powder 1 is discharged. Loss is prevented, and since the discharge valve 3 is opened after the initial discharge, the air pressure in the interior 45 of the discharge guide 25 and the mixing chamber 6 becomes almost the same as the outside air pressure, but does not scatter Because it can be discharged at a high speed, dust generation or powder scattering is prevented, so the powder composition ratio does not change. Therefore, defective products such as insufficient content or impurities are not formed and/or manufactured.

On the other hand, when other powders (1) or other types of powders (1) are mixed, other powders (1) or other powders (1) metered into the hopper (2) with the discharge valve (4) closed using the valve driving part (5) After putting in the different types of powder (1) measured, when the discharge valve (4) is opened using the valve actuator (5), the powder (1) of the hopper (2) weighed in is discharged through the discharge pipe (3) and the inlet (7). It passes through and is dropped into the mixing chamber 6, and when the entire amount of the powder 1 of the hopper 2 is put in, the discharge valve 4 is closed using the valve driving unit 5.

On the other hand, when a plurality of powders (1) are mixed, they are added by repeating the above process, and when the input of a plurality of powders (1) input according to the order is completed into the mixing chamber (6), it is closed with the valve driving unit (10). When the valve 9 is closed to close the doorway 7, and the sealing tube 29 that has been descended using the lifting cylinders 23 and 24 is lifted and returned, the mixer 8 can rotate and mix motion. do.

In the state in which the sealing tube 29 of the discharge guide 25 is raised, the mixer 8 is rotated and/or mixed by the driving means 15 to homogeneously and sufficiently mix the injected powder 1b. As shown in 11, when the sealing valve 9 is opened using the valve driving unit 10 in a state in which the entrance 7 is rotated downward, the mixed powder 1b passes through the entrance 7 and is discharged while falling. It is discharged to a container or hopper 200 through the discharge guide 250 and then transferred to a process not shown and commercialized.

In the present invention, when transferring the powder (1) discharged from the hopper scale or hopper (2) to the mixer (8), the entire amount is transferred without scattering or loss at all, so there is no change in the mixing composition ratio of the powder and quality defects are prevented, In addition, there is an advantage in that the environment-friendly powder transfer is made because the surrounding pollution is prevented and does not penetrate into the respiratory tract of the worker.

In the present invention, the powder 1 filled in the hopper 2 in a state in which the interior 45 and the mixing chamber 6 of the discharge guide 25 are depressurized or maintained in a vacuum state using the vacuum pump 44 is Since it naturally moves to the mixing chamber (6) by the pressure difference without resistance or stress, the phenomenon and loss of the powder (1) is prevented from scattering around or to the workplace space, the sanitary safety of workers is ensured, and the powder is mechanically There is an effect that a fixed amount of powder can be stably moved to the mixer 8 and mixed without applying a stress.

The present invention described as described above is not limited to the present embodiment and the accompanying drawings, and various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention, which is in the technical field to which the present invention pertains. It is obvious to those with ordinary knowledge.

(1)(1a)(1b)(1c)(1d)--Powder (2)--Hopper (or hopper scale)
(3)--Discharge pipe (4)--Discharge valve
(5)(10)--Valve actuator (6)--Mixing chamber
(7)--Entrance (8)--Mixer
(9)--Sealing valve (11)(12)--Axial
(11a)(12a)--shaft support (13)(14)--support
(15)--Drive means (16)--Bottom surface
(17)--Gap (18)--Dust cover
(19)--Intake pipe (20)--Dust collector
(21)--Transfer system (23)(24)--Elevating cylinder
(25)--Exhaust guide (26)--Slope
(27)--Support pipe (28)--O-ring
(29)--Sealing pipe (30)--Combination groove
(31)(35)(38)--through hole (32)--round plate
(33)(34)--Rod (36)(39)--Packing
(37)--Flange surface (40)--Connection
(41)--On/Off valve (42)--Intake pipe
(44)--Vacuum pump (45)--Inside of exhaust guide

Claims (6)

hopper from which powder is discharged;
a mixer installed at the lower part of the hopper and provided with a mixing chamber and an entrance;
Discharge guide installed between the hopper and the mixer and elevating by the elevating cylinder; including,
The discharge guide is
an inclined surface formed on the lower outer periphery of the hopper;
a support pipe having an upper portion fixed to the inclined surface and surrounding the hopper discharge pipe;
O-ring installed on the upper outer periphery of the support pipe;
Sealed tube coupled to the outer periphery of the O-ring;
a circular plate fixed to the lower end of the closed pipe and having a through hole having a larger inner diameter than the discharge pipe in the center;
a rod of a plurality of elevating cylinders fixed to the upper surface of the circular plate;
a ring-shaped packing having a hole formed in the center and fixed to the bottom surface of the circular plate;
A powder conveying system comprising a. The method of claim 1 ;
an intake pipe and a vacuum pump having an on/off valve connected to one side of the closed pipe;
A powder conveying system further comprising a. 3. The method according to claim 1 or 2;
a coupling groove formed on the upper inner periphery of the sealed tube and coupled to the outer periphery of the O-ring;
Powder conveying system further comprising a. 3. The method according to claim 1 or 2;
Packing installed on the flange face of the mixer and having a hole in the center;
Powder conveying system further comprising a. 3. The method according to claim 1 or 2;
The hopper is a powder conveying system, characterized in that it is a hopper scale. 3. The method according to claim 1 or 2;
The powder is powder, fine powder, colloid, fine powder, normal powder, coarse powder, powder conveying system, characterized in that any one of three.

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