CN102413914B

CN102413914B - Device for feeding fixed amount of powder and powder solving device equipped with same

Info

Publication number: CN102413914B
Application number: CN201080017629.7A
Authority: CN
Inventors: 别惣俊二
Original assignee: Izumi Food Machinery Co Ltd
Current assignee: Izumi Food Machinery Co Ltd
Priority date: 2009-06-01
Filing date: 2010-05-26
Publication date: 2014-05-07
Anticipated expiration: 2030-05-26
Also published as: KR20120000566A; KR101282185B1; CN102413914A; WO2010140516A1

Abstract

Provided is a device for feeding a fixed amount of powder capable of stabilizing the powder flow rate and continuously feeding the powder in steps of a predetermined amount without causing the powder to attach to and accumulate in a powder flowing portion of a flow rate adjusting member and also capable of preventing gas from being mixed by entrainment with the feeding powder. The device for feeding a fixed amount of powder comprises: a casing (10) equipped with a powder inlet (11) and a powder outlet (12); a metric rotating body (2) including a plurality of powder containing chambers (20) provided at equal intervals in the circumferential direction; and a driving mechanism (M) for rotationally driving the metric rotating body (2). An expansion chamber (13) is formed at a position in the casing (10), from which the powder fed from the powder inlet (11) into the powder containing chambers (20) of the metric rotating body (2) is discharged, and is maintained at a lower pressure than the powder inlet (11) by sucking power acting from the powder outlet (12). Each of the powder containing chambers (20) is configured so as to repeatedly change the states thereof along with the rotation of the metric rotating body (2) in the order of an expansion chamber free state, a first closed state, a powder inlet opening state, and a second closed state.

Description

Powder quantitative feeder and possess the powder dissolution device of this powder quantitative feeder

Technical field

The present invention relates to a kind of powder quantitative feeder and powder dissolution device, relate in particular to a kind of can entrained air etc. gas (in this description, being only called " gas ") and powder predetermined amounts can be supplied to continuously to the powder quantitative feeder of centrifugal pump etc. and possess the powder dissolution device of this powder quantitative feeder.

Background technology

In the past, such as when lodging in powder predetermined amounts in hopper and be supplied to continuously powder dissolution device etc., by the powder outlet at hopper or the powder feeding road that is connected with this powder outlet, the flow regulating part consisting of valve or throttle orifice etc. is set, thereby regulate the flow (for example, referring to Patent Document 1～3) of powder.

Previous patent document

Patent documentation

Patent documentation 1: Japanese Patent Publication 2006-281017 communique

Patent documentation 2: Japanese Patent Publication 2007-216172 communique

Patent documentation 3: Japanese Patent Publication 2009-057146 communique

Brief summary of the invention

The problem that invention will solve

But, the above-mentioned flow regulating part consisting of valve or throttle orifice etc. has by regulating the flow of powder, the powder predetermined amounts that lodges in hopper is supplied to continuously to the function of powder dissolution device etc., but, there are the following problems: such as usining the strong powder of coherency during as object etc., powder easily adheres to and is deposited in the powder throughput of flow regulating part and the flow of powder becomes unstable, cannot realize the expection object that powder predetermined amounts is supplied to continuously to powder dissolution device etc.

And there are the following problems: when supplying with powder from hopper, owing to producing rat hole etc., thus in powder easily with gas, its result, reason is sneaked into the gas in powder and the bubble that produces, causes the dissolved efficiency of powder dissolution device to decline.

And, there are the following problems: in powder dissolution device in the past, because centrifugal pump and powder together attract gas (comprising the gas between the particle that is present in powder) when powder (this trend is large at particle diameter and gas permeability is higher remarkable), so the dissolved efficiency based on centrifugal pump declines, and lysate bubbles when the higher powder of the foaming characteristics such as polyvinyl alcohol (PVA) (this trend remarkable) because of the gas being together attracted with powder, the Quality Down of lysate.

The present invention completes in view of the problem points that above-mentioned powder quantitative feeder in the past has, its the 1st object is to provide a kind of and can avoids powder to adhere to and be deposited in the powder throughput of flow regulating part and make the stability of flow of powder, and predetermined amounts is supplied with powder continuously, and can prevent because sneak into the powder quantitative feeder in supplied with powder with gas.

And, it is a kind of by possessing above-mentioned powder quantitative feeder that the 2nd object of the present invention is to provide, can maintain with pinpoint accuracy the solubility of powder, and by reducing the bubble producing because of the gas of sneaking in powder, improve the powder dissolution device of dissolved efficiency.

And, the 3rd object of the present invention is to provide a kind of powder dissolution device, while attracting powder by centrifugal pump from hopper, by reducing the absolute magnitude that is together attracted to the gas of centrifugal pump with powder, thereby can not decline because sneaking into of gas makes dissolved efficiency, can improve the quality of lysate.For solving the means of problem

In order to realize above-mentioned the 1st object, powder quantitative feeder of the present invention, comprising: housing, possesses powder feeding mouth and powder outlet, metering rotary body uniformly-spaced possesses a plurality of powder accommodating chambers, and is rotatably provided in housing on circumferentially, and driving mechanism, rotarily actuate metering rotary body, it is characterized in that, form as follows: the position in the described housing of powder of emitting the powder accommodating chamber that is given to metering rotary body from powder feeding confession, by the attraction by the effect of powder outlet, formation maintains the more expanding chamber of low pressure than powder feeding mouth, rotation along with metering rotary body, the expanding chamber open state of the state of each powder accommodating chamber to open to expanding chamber, the 1st air-tight state not being communicated with expanding chamber and powder feeding mouth, the powder feeding mouth open state of opening to powder feeding mouth, and the reiteration of the 2nd air-tight state not being communicated with powder feeding mouth and expanding chamber changes, and with the opening of central part side of metering rotary body at the 1st air-tight state, the mode being closed under powder feeding mouth open state and the 2nd air-tight state, make closure of openings parts relatively measure the central part of rotary body and be provided in housing, and, when at least 1 powder accommodating chamber is when forming the opening of outer peripheral face side of metering rotary body of this powder accommodating chamber and the untight expanding chamber open state of opening of central part side, be positioned at the untight expanding chamber open state of opening that becomes the central part side of only having the metering rotary body that forms this powder accommodating chamber than at least 1 powder accommodating chamber of more close the 2nd air-tight state side of this powder accommodating chamber.

In addition, can possess for accumulating the hopper of the powder that is supplied to powder feeding mouth, this hopper is del, from the summit being positioned at bottom, along 1 limit passing through this summit, form the powder feeding mouth of slit-shaped, and can not comprise vertical formation the wall on the limit that has formed this powder feeding mouth.

And, in order to realize above-mentioned the 2nd object, powder dissolution device of the present invention, it is characterized in that, possesses described powder quantitative feeder, the primary side of centrifugal pump is connected in to powder outlet and makes attraction force acts attract powder in expanding chamber, and attracted powder is mixed with liquid in centrifugal pump.

And in order to realize above-mentioned the 3rd object, powder dissolution device of the present invention, is characterized in that, the pressure in described hopper is maintained to negative pressure, and by the attraction of centrifugal pump, powder is attracted to centrifugal pump in the hopper of this negative pressure state.

This powder dissolution device is attracted to centrifugal pump by powder by the attraction of centrifugal pump in the hopper of negative pressure state, thereby can reduce while attracting powder by centrifugal pump from hopper, is together attracted to the absolute magnitude of the gas of centrifugal pump with powder.

And, the airtight member of the powder input port of airtight described hopper can be set.

In this powder dissolution device, if to pass through the state running centrifugal pump of the powder input port of the airtight hopper of airtight member, the gas in hopper attracts by centrifugal pump and discharges, thereby the pressure in hopper can be maintained to negative pressure.

At this, the attraction of the gas in the hopper based on centrifugal pump and discharging except by not attracteding to powder and solvent when the starting centrifugal pump the state idle running centrifugal pump of centrifugal pump carries out, can also carry out powder and solvent during centrifugal pump when being attracted to the actual motion of centrifugal pump from starting, carry out attraction and the discharge of the gas in hopper.

And, can be by the powder feeding device that possesses whizzer and attract member by the powder feeding that lodges in powder reservoir to described hopper.

This powder dissolution device can be supplied with powder separated in whizzer in hopper, and according to attracting member and carrying out attraction and the discharge of the gas in hopper by whizzer, thereby the pressure in hopper is maintained to negative pressure.

And, can be provided for the pressure in hopper to remain on the pressure-regulating valve in predetermined pressure range at described hopper.

The attraction that this powder dissolution device can remain on centrifugal pump by the pressure in hopper by pressure-regulating valve does not have in the pressure limit of decline relatively.

Invention effect:

According to powder quantitative feeder of the present invention, form as follows: the position in the described housing that the powder that is given to the powder accommodating chamber of metering rotary body from powder feeding confession is emitted, by the attraction by the effect of powder outlet, formation maintains the more expanding chamber of low pressure than powder feeding mouth, rotation along with metering rotary body, the expanding chamber open state of the state of each powder accommodating chamber to open to expanding chamber, the 1st air-tight state not being communicated with expanding chamber and powder feeding mouth, the powder feeding mouth open state of opening to powder feeding mouth, and the reiteration of the 2nd air-tight state not being communicated with powder feeding mouth and expanding chamber changes, powder accommodating chamber is under (1) the 1st air-tight state thus, with are blocked expanding chamber and being communicated with of powder feeding mouth, maintain low pressure (for example vacuum) state identical with the state of opening to expanding chamber, under (2) powder feeding mouth open state, powder passes through pressure differential, particularly, by the attraction based on pressure differential be present in the expansive force of the gas between powder, compare when only based on powder own wt, further forcibly efficiently and reliablely and stablely for example, from the powder feeding mouth of high pressure (atmospheric pressure) state, supply with and be filled to the powder accommodating chamber of low pressure (for example vacuum) state, under (3) the 2nd air-tight states, with are blocked expanding chamber and being communicated with of powder feeding mouth, for example, with the identical high pressure of the state with opening to powder feeding mouth (atmospheric pressure) state, maintain the state that powder is filled to powder accommodating chamber, under (4) expanding chamber open state, the powder that is filled to powder accommodating chamber passes through pressure differential, particularly, by the attraction based on pressure differential be present in the expansive force of the gas between powder, during with the own wt based on powder only, compare, further forcibly efficiently and reliablely and stablely for example, from the powder accommodating chamber of high pressure (atmospheric pressure) state, be discarded to the expanding chamber of low pressure (for example vacuum) state.

Thus, can avoid powder to adhere to and be deposited in powder accommodating chamber and make the stability of flow of powder, and predetermined amounts is supplied with powder continuously.

At this, the rotating speed that the quantity delivered of powder can be measured rotary body by change regulates.

And, under the powder feeding mouth open state of above-mentioned (2), for example, for example, by the impact producing because of powder, produce mechanicalness vibration when the powder accommodating chamber of low pressure (vacuum) state is supplied with and be filled to the powder feeding mouth of high pressure (atmospheric pressure) state, thereby can promote flowing of powder, for example can prevent the generation of the rat hole in hopper or the delay of powder, and then prevent because sneaking in supplied with powder with gas.

And, under the expanding chamber open state of above-mentioned (4), because the powder that is discarded to expanding chamber for example, in low pressure (vacuum) state, therefore can suppress cohesion by the relation of bulk density, and the powder in the powder feeding road that can prevent from being connected with downstream stops up.

And, to form described powder accommodating chamber at the metering outer peripheral face of rotary body and the mode of central part opening, mode with the opening of the outer peripheral face side of sealing type measuring rotary body under the 1st air-tight state and the 2nd air-tight state forms housing, and with at the 1st air-tight state, the mode of the opening of the central part side of sealing type measuring rotary body under powder feeding mouth open state and the 2nd air-tight state, make closure of openings parts relatively measure the central part of rotary body and be provided in housing, thus under the expanding chamber open state of above-mentioned (4), the opening of outer peripheral face side and the opening of central part side of metering rotary body are opened, and do not exist powder easily to adhere to and be deposited in the bight of powder accommodating chamber, so can further forcibly efficiently and reliablely and stablely emit the powder that is filled to powder accommodating chamber.

And, form as follows: when at least 1 powder accommodating chamber is when forming the opening of outer peripheral face side of metering rotary body of this powder accommodating chamber and the untight expanding chamber open state of opening of central part side, be positioned at the untight expanding chamber open state of opening that becomes the central part side of only having the metering rotary body that forms this powder accommodating chamber than at least 1 powder accommodating chamber of more close the 2nd air-tight state side of this powder accommodating chamber, thus under the expanding chamber open state of above-mentioned (4), by pressure differential from the powder with kinetic energy that only has the powder accommodating chamber of the untight expanding chamber open state of opening of the central part side of metering rotary body to emit, while being discarded to expanding chamber from measuring the central part side opening of the opening of outer peripheral face side of rotary body and the metering rotary body of the powder accommodating chamber that the opening of central part side is opened through outer peripheral face side opening, brush lightly the powder of the metering rotary body that falls to being attached to this powder accommodating chamber, thereby can further forcibly efficiently and reliably emit the powder that is filled to powder accommodating chamber.

In addition, possess for accumulating the hopper of the powder that is supplied to powder feeding mouth, this hopper is del, from the summit being positioned at bottom, along 1 limit passing through this summit, form the powder feeding mouth of slit-shaped, and the wall that does not comprise the limit that has formed this powder feeding mouth vertical formation, thus can be with simple structure, the powder that lodges in hopper is smooth and easy and be reliablely and stablely supplied to powder accommodating chamber, and can prevent the generation of the rat hole in hopper or the delay of powder, further prevent because sneaking in supplied with powder with gas.

And, according to powder dissolution device of the present invention, possesses above-mentioned powder quantitative feeder, the primary side of centrifugal pump is connected in to powder outlet and makes attraction force acts attract powder in expanding chamber, and attracted powder is mixed in centrifugal pump with liquid, can the expanding chamber of powder quantitative feeder be maintained to low pressure by the attraction of centrifugal pump thus, and can with pinpoint accuracy, maintain the solubility of powder by powder predetermined amounts being supplied to continuously to powder dissolution device, and, can improve by reducing the bubble producing because of the gas of sneaking in powder the dissolved efficiency of powder dissolution device.

And, according to powder dissolution device of the present invention, when attracting powder by centrifugal pump from hopper, can reduce the absolute magnitude that is together attracted to the gas of centrifugal pump with powder, and can prevent from declining because of the dissolved efficiency of sneaking into of gas.

And, can suppress the foaming of the lysate that the gas because being together attracted with powder produces, and can improve the quality of lysate.

And, according to the airtight member that the powder input port of airtight described hopper is set, and by running centrifugal pump, the pressure in hopper can be maintained to negative pressure.

And, make to lodge in the powder of powder reservoir by possessing whizzer and attracting the powder feeding device of member to be supplied to described hopper, can when supplying with powder in hopper, the pressure in hopper be maintained to negative pressure thus.

And, by being provided for that the pressure in hopper is remained on to the pressure-regulating valve in predetermined pressure limit, thereby can prevent that the attraction of centrifugal pump from declining relatively, can prevent powder adverse current simultaneously.

Accompanying drawing explanation

Fig. 1 represents an embodiment of powder quantitative feeder of the present invention, is (a) front view of partial cross section, is (b) the X-X sectional view of (a), (c) is the key diagram of gas introduction part.

Fig. 2 represents the hopper of this powder quantitative feeder, is (a) front cross-sectional view, is (b) top view, is (c) partial section of side.

Fig. 3 illustrates the figure of the action of this powder quantitative feeder according to the state variation of specific powder accommodating chamber, (a) represent expanding chamber open state, (b) represent the 1st air-tight state, (c) represent powder feeding mouth open state, (d) represent the 2nd air-tight state, (e) represent to only have the untight expanding chamber open state of opening of the central part side of measuring rotary body, (f) represent the opening of outer peripheral face side and the untight expanding chamber open state of the opening of central part side of metering rotary body.

Fig. 4 means the key diagram of an embodiment of the powder dissolution device that comprises powder quantitative feeder of the present invention.

Fig. 5 means the key diagram of other embodiment of this powder dissolution device.

Fig. 6 means the synoptic diagram that the pressure in the hopper of powder dissolution device of the present invention is maintained to the embodiment of negative pressure.

Fig. 7 is the key diagram of airtight member, (a) is synoptic diagram, is (b) the inside figure of cover, (c) is the top view of powder input port.

Fig. 8 represents the centrifugal pump for this powder dissolution device, is (a) sectional view, is (b) key diagram of stator.

Fig. 9 is the sectional view for the gas-liquid separation device of this powder dissolution device.

Figure 10 means the chart of the suction pressure of pressure in hopper and centrifugal pump.

Figure 11 means the synoptic diagram that the pressure in the hopper of powder dissolution device of the present invention is maintained to the variant embodiment of negative pressure.

The specific embodiment

Below, with reference to the accompanying drawings powder quantitative feeder of the present invention and the embodiment that possesses the powder dissolution device of this powder quantitative feeder are described.

One embodiment of powder quantitative feeder of the present invention shown in Fig. 1～Fig. 2.

As shown in Figure 1, this powder quantitative feeder 1 comprises the housing 10 that possesses powder feeding mouth 11 and powder outlet 12, on circumferentially, a plurality of powder accommodating chambers 20 are uniformly-spaced set and are rotatably provided in the metering rotary body 2 in housing 10, and the driving mechanism M of rotary actuation metering rotary body 2, wherein form as follows: the position in the described housing 10 of powder of emitting the powder accommodating chamber 20 that is supplied to metering rotary body 2 from powder feeding mouth 11, by the attraction by 12 effects of powder outlet, formation is maintained in than powder feeding mouth 11 expanding chamber 13 of low pressure more, rotation along with metering rotary body 2, the expanding chamber open state of the state of each powder accommodating chamber 20 to open to expanding chamber 13, the 1st air-tight state not being communicated with expanding chamber 13 and powder feeding mouth 11, the powder feeding mouth open state of opening to powder feeding mouth 11, and the reiteration of the 2nd air-tight state not being communicated with powder feeding mouth 11 and expanding chamber 13 changes.

At this, the quantity delivered of powder can regulate by the rotating speed changing based on rotariling actuate the metering rotary body 2 of the driving mechanism M that measures rotary body 2.

As long as powder quantitative feeder 1 is following formation, by the attraction by 12 effects of powder outlet, formation maintains than powder feeding mouth 11 expanding chamber 13 of low pressure more, and the rotation along with metering rotary body 2, the state of each powder accommodating chamber 20 changes as described above repeatedly, its formation is not particularly limited, for example can also form metering rotary body 2 by the universal rotary valve (omitting diagram) that is set to the radial blade in next door at rotating shaft, but in the present embodiment, to form powder accommodating chamber 20 at the metering outer peripheral face of rotary body 2 and the mode of central part opening, mode with the opening of the outer peripheral face side of sealing type measuring rotary body 2 under the 1st air-tight state and the 2nd air-tight state forms housing 10, and with at the 1st air-tight state, the mode of the opening of the central part side of sealing type measuring rotary body 2 under powder feeding mouth open state and the 2nd air-tight state, make closure of openings parts 3 relatively measure the central part of rotary body 2 and be fixedly equipped on housing 10.

And, owing to forming at the metering outer peripheral face of rotary body 2 and the mode of central part opening with powder accommodating chamber 20, so in the present embodiment, by metering rotary body 2 (is not particularly limited, but is in the present embodiment 8 with the radial multi-disc of uniformly-spaced installing at the disc parts 22a (central part that does not comprise this disc parts 22a) that is equipped on the driving shaft 22 of driving mechanism M.) tabular next door 21, thereby on circumferentially, uniformly-spaced divide and form powder accommodating chamber 20.

And, in the present embodiment, form as follows, when at least 1 powder accommodating chamber 20 is when forming the opening of outer peripheral face side of metering rotary body 2 of this powder accommodating chamber 20 and the untight expanding chamber open state of opening of central part side, be positioned at the untight expanding chamber open state of opening that becomes the central part side of only having the metering rotary body 2 that forms this powder accommodating chamber 20 than at least 1 powder accommodating chamber 20 of more close the 2nd air-tight state side of this powder accommodating chamber 20.

Powder outlet 12 by attracting mechanism, the primary side that is for example connected in the centrifugal pump of powder dissolution device makes attraction force acts in expanding chamber 13, and makes expanding chamber 13 maintain low pressure (vacuum) state.

In addition, as shown in Fig. 1 (c), in order to remove as required the gas of use to the interior importing of expanding chamber 13 from outside, therefore gas introduction part 14 can be set in expanding chamber 13.

This gas introduction part 14 possesses valve, and when maintenance waits relief valve, thereby can be from outside to the interior importing gas of expanding chamber 13, and removing is present in the powder in powder feeding road.

And, as shown in Figure 2, the hopper H that accumulates the powder of the powder feeding mouth 11 that is supplied to powder quantitative feeder 1 forms the inverted triangle taper of upper opening, from being positioned at the summit A bottom of the hopper H of inverted triangle taper, along 1 the limit B that passes through this summit A, form the outlet Ha of slit-shaped, it is the powder feeding mouth 11 of powder quantitative feeder 1, and, vertical (this wall C with respect to the horizontal plane angulation θ 1 is made as 90 °), form the wall C that does not comprise the limit B that forms this outlet Ha, in addition, by comprise limit B angle wall D with respect to the horizontal plane angulation θ 2 be made as 50～70 ° (in the present embodiment, being 60 °).

The powder that thus, can prevent from lodging in hopper H adheres to and is deposited in wall C, the D of hopper H.

In addition, at the near zone that is positioned at the summit A bottom of hopper H, can also make to be formed at vertical wall C band radius of corner and a little laterally (the flow direction side of powder) retreat (omitting diagram).

And the limit B that makes to form outlet Ha with respect to the horizontal plane angulation θ 3 forms 40～50 ° (in the present embodiment being 45 °).

Thus, can towards outlet Ha, send the powder that lodges in hopper H swimmingly.

And, the shape of the outlet Ha of slit-shaped can be according to suitably settings such as the characteristics of the discharge rate of the size of hopper H, powder (supply of the powder of powder quantitative feeder 1), powder, but, for example the size of the length direction along limit B is set as to 20～100mm left and right, be preferably set to 30～50mm left and right, the size of width is set as to 1～5mm left and right, is preferably set to 1.5～2mm left and right.

This hopper H can be smooth and easy and be reliablely and stablely supplied to the powder accommodating chamber 20 of powder quantitative feeder 1 by the powder that lodges in hopper H with simple structure, and can prevent the generation of the rat hole in hopper H or the delay of powder, and then prevent because sneaking in supplied with powder with gas.

Especially, the outlet Ha of slit-shaped compares with general circular row outlet in the past, be difficult for blocking because of powder, and, even if produce the rat hole of vertical direction in the powder in lodging in hopper H, rat hole also can collapse and easily block because of the own wt of powder, therefore, by because sneaking into gas in the supply powder in circular row outlet in the past, thereby the many and Quality Down of lysate of contained bubble quantitative change in lysate, and then the effect with respect to powder disappears for the attraction of discharging, thus the problem that the supply that can solve powder stops and so on.

Then, according to the variation of the state of specific powder accommodating chamber 20A, the action of above-mentioned powder quantitative feeder 1 is described.

Fig. 3 (a): expanding chamber open state (latter stage)

Represent that powder is released state afterwards, powder accommodating chamber 20A is owing to only having the opening of the central part side of metering rotary body 2 do not seal and be communicated with expanding chamber 13, and for example, thereby become low pressure (vacuum) state, ("-" in figure (bearing) represents low-pressure state.Identical below.)。

Fig. 3 (b): the 1st air-tight state

Powder accommodating chamber 20A with are blocked expanding chamber 13 and being communicated with of powder feeding mouth 11, maintain low pressure (for example vacuum) state identical with the state of opening to expanding chamber 13.

Fig. 3 (c): powder feeding mouth open state

Powder passes through pressure differential, particularly, by the attraction based on pressure differential be present in the expansive force of the gas between powder, compare when only based on powder own wt, forcibly efficiently and reliablely and stablely for example, from high pressure (atmospheric pressure) state, ("+" figure (just) represents high pressure conditions.Identical below.) powder feeding mouth 11 supply with and be filled to the powder accommodating chamber 20A of low pressure (for example vacuum) state.

At this moment, the impact for example, for example, producing when the powder accommodating chamber 20A of low pressure (vacuum) state is supplied with and be filled to the powder feeding mouth 11 of high pressure (atmospheric pressure) state because of powder produces mechanicalness vibration, thereby promote flowing of powder, for example can prevent the generation of the rat hole in hopper or the delay of powder, and then prevent because sneaking in supplied with powder with gas.

Fig. 3 (d): the 2nd air-tight state

Powder accommodating chamber 20A the connection with powder feeding mouth 11 and expanding chamber 13 be blocked and high pressure (for example atmospheric pressure) state identical with the state of opening to powder feeding mouth 11 under, can maintain the state that powder is filled to powder accommodating chamber 20A.

Fig. 3 (e): expanding chamber open state (initial stage)

The powder that is filled to powder accommodating chamber 20A passes through pressure differential, particularly, by the attraction based on pressure differential be present in the expansive force of the gas between powder, during with the own wt based on powder only, compare, further forcibly efficiently and reliablely and stablely for example, from the powder accommodating chamber 20A of high pressure (atmospheric pressure) state, be discarded to the expanding chamber 13 of low pressure (for example, vacuum) state.

At this moment, because powder accommodating chamber 20A becomes the untight expanding chamber open state of opening of the central part side of only having the metering rotary body 2 that forms this powder accommodating chamber 20A, therefore, when the powder with kinetic energy of emitting from this powder accommodating chamber 20A by pressure differential, from what be positioned at than the direction of rotation side of the more close metering rotary body 2 of this powder accommodating chamber 20A, when the opening of the central part side of the metering opening of outer peripheral face side of rotary body 2 and the metering rotary body 2 of the powder accommodating chamber 20 that the opening of central part side is opened is discarded to expanding chamber 13 through the opening of outer peripheral face side, brush lightly the powder on the metering rotary body 2 that falls to being attached to this powder accommodating chamber 20, thereby can further forcibly efficiently and reliablely and stablely emit the powder that is filled to powder accommodating chamber 20.

Fig. 3 (f): expanding chamber open state (mid-term)

Prolonged expansion chamber open state (mid-term), the powder that is filled to powder accommodating chamber 20A passes through pressure differential, particularly, by the attraction based on pressure differential be present in the expansive force of the gas between powder, during with the own wt based on powder only, compare, further forcibly efficiently and reliablely and stablely for example, from the powder accommodating chamber 20A of high pressure (atmospheric pressure) state, be discarded to the expanding chamber 13 of low pressure (for example, vacuum) state.

At this moment, the opening of outer peripheral face side and the opening of central part side that form the metering rotary body 2 of powder accommodating chamber 20A are opened, do not exist powder easily to adhere to and be deposited in the bight of powder accommodating chamber 20A, so can further forcibly efficiently and reliablely and stablely emit the powder that is filled to powder accommodating chamber 20A.

And, at this moment, as above-mentioned, from being positioned at the powder with kinetic energy of emitting by pressure differential than the powder accommodating chamber 20 of the direction of rotation opposition side of the more close metering rotary body 2 of powder accommodating chamber 20A (the 2nd air-tight state side), brush lightly the powder of the metering rotary body 2 that falls to being attached to powder accommodating chamber 20A, thereby can further forcibly efficiently and reliablely and stablely emit the powder that is filled to powder accommodating chamber 20A.

And, under expanding chamber open state, be for example discarded to the powder of expanding chamber 13, in low pressure (vacuum) state, thus can suppress cohesion by the relation of bulk density, and the obstruction of the powder on the powder feeding road that can prevent from being connected with downstream.

Below, the state of powder accommodating chamber 20A (20) similarly changes repeatedly, avoids powder to adhere to and is deposited in powder accommodating chamber 20A (20) above making the stability of flow of powder, thereby can supply with continuously powder by predetermined amounts.

An embodiment who possesses the powder dissolution device of powder quantitative feeder of the present invention shown in Fig. 4.

This powder dissolution device S possesses above-mentioned powder quantitative feeder 1, make the primary side 6a of centrifugal pump 6 be connected in powder outlet 12 and make attraction force acts attract powder in expanding chamber 13, and attracted powder for example, is mixed with liquid (water) in centrifugal pump 6.

More specifically, this powder dissolution device S is by forming as follows: powder quantitative feeder 1; Solvent supplying apparatus 4 for feedwater; Mixing nozzle 5, mixes the powder of supplying with from powder quantitative feeder 1 and the water of supplying with from solvent supplying apparatus 4; Centrifugal pump 6, dissolved powders and water; And gas-liquid separation device 7, be equipped on the exhaust end of centrifugal pump 6, make to contain the not lysate of dissolved matter in lysate and circulate in centrifugal pump 6 by circulatory flow 7a, and send and do not contain the not lysate of dissolved matter from outlet 7b.

Now, as shown in Figure 4, between the primary side 6a of centrifugal pump 6 and the powder outlet 12 of powder quantitative feeder 1, (in the present embodiment, make mixing nozzle 5 between wherein.) preferably with linearity and become as far as possible short-range mode and form.

And, this powder dissolution device S can be maintained low pressure by the expanding chamber of powder quantitative feeder 1 13 by the attraction of centrifugal pump 6, and can pass through powder quantitative feeder 1, preventing to mixing nozzle 5, supplying with powder continuously because sneak into predetermined amounts under the state in powder with gas, so can access the lysate of blending ratio with the predetermined water gaging of other supply constant and flow and constant concentration, and, by reducing the bubble producing because of the gas of sneaking in powder, prevent the decline of the dissolved efficiency of powder dissolution device S, can proceed to dissolve operation with high efficiency, and increase circular flow and attraction, thereby with pinpoint accuracy, maintain the solubility of powder.

The variant embodiment that possesses the powder dissolution device of powder quantitative feeder of the present invention shown in Fig. 5.

Fig. 5 (a) and (b) shown in powder dissolution device S1, S2 for the hopper H of powder quantitative feeder 1 being arranged on to the low seat formula hopper type of lower position, can easily carry out powder to the input of hopper H.

Between the primary side 6a of centrifugal pump 6 and the powder outlet 12 of powder quantitative feeder 1, be to be connected by bending to pipe arrangement 8a or the flexible pipe 8b of S word.

Now, the attraction based on centrifugal pump 6 is preferably set to the attraction based on centrifugal pump 6 of the powder dissolution device S being greater than shown in Fig. 4.

Like this, even in the time of more than being for example made as several meters for low seat formula hopper type and by the length of flexible pipe 8b, also can from powder quantitative feeder 1 predetermined amounts, to centrifugal pump 6, supply with continuously powder by mixing nozzle 5, so can increase the free degree of the setting position of hopper H or centrifugal pump 6, and can improve the workability while processing powder.

And the powder dissolution device S3 shown in Fig. 5 (c) is used centrifugal separating device 9 to supply with the powder of supplying with to powder quantitative feeder 1.

Now, from the groove T that accumulates powder, by attracting flexible pipe etc. together to be discharged from the outlet 9b of top by the gas that attracts mouthful 9a to attract with powder, only have powder to lodge in the powder reservoir 9c of below, and be supplied to powder quantitative feeder 1.

Like this, by using centrifugal separating device 9, can be from the groove T that accumulates powder by attracting flexible pipe etc. powder to be accumulated in the powder reservoir 9c of centrifugal separating device 9 and being supplied to powder quantitative feeder 1, and can increase the free degree of accumulating the groove T of powder or the setting position of centrifugal pump 6, and can improve the workability while processing powder.

Shown in Fig. 6～Figure 10, the pressure in the hopper of powder dissolution device of the present invention is maintained to the embodiment of negative pressure.

This powder dissolution device S4 for example possesses, when rotation by rotary wings 63A attracts powder and solvent (water) and stirs and the centrifugal pump 6 dissolving and the hopper H that supplies with powder to centrifugal pump 6, this device forms as follows: the pressure in described hopper H is maintained to negative pressure, and the attraction producing by the rotation because of the rotary wings 63A of centrifugal pump 6 attracts powder to centrifugal pump 6 in the hopper H of this negative pressure state.

But, in the present embodiment, as the pressure in above-mentioned hopper H being maintained to the member of negative pressure, the airtight member 110 of the powder input port Hb of airtight hopper H is set.

When this airtight member 110 is only limited to powder input port Hb that can airtight hopper H and prevents from dissolving operation, from the member of outside inflow gas, its structure is not particularly limited, and in the present embodiment, uses the cover 111 that covers powder input port Hb.

As shown in Figure 7, cover 111 is arranged on by seal member P that the open end of powder input port Hb is extended to the receiving portion Hc that forms is laterally upper, by by the fixing airtight powder input port Hb of coming of the clamp structures such as fixture, bolt (omitting diagram).

And, at cover 111, set while unloading lower cover member 111 from the hopper H of negative pressure state the open and close valve 111a for boosting in to hopper H.

In addition, open and close valve 111a can also need not be provided in cover 111 and directly be provided on hopper H.

In addition, as airtight member 110, except using cover 111, can also use the blocking-up members (omitting diagram) such as flap valve.

And, at the powder outlet Ha that becomes the hopper H of powder feeding mouth 11, set described powder quantitative feeder 1.

Powder quantitative feeder 1 is supplied with the function of powder to centrifugal pump 6 predetermined amounts continuously except possessing from hopper H, also possesses the function that the pressure in hopper H is made as to negative pressure.

; when carrying out degassed operation described later; can be by making the attraction of centrifugal pump 6 act on hopper H from metering rotary body 2 and the gap of housing 10; thereby described gap is played a role as the filter of only allowing gas communication; from this gap, attract the gas in hopper H, will in the hopper H by the airtight powder of airtight member 110 input port Hb, be made as negative pressure state.

At this moment, preferably in centrifugal pump 6, by from sucting 61A donor solvent and only circular flow solvent prevent the ablation of centrifugal pump 6.

Solvent supplying apparatus 4 to centrifugal pump 6 donor solvents possesses flowmeter, and the liquid predetermined amounts as solvent is supplied to centrifugal pump 6.

By mixing nozzle 5, to centrifugal pump 6, supply with powder and solvent.

About this mixing nozzle 5, by solvent is supplied to from solvent supplying apparatus 4 while circling round after initial stage that mixing nozzle 5 carries out powder and solvent mixes, from the sucting 61 of centrifugal pump 6, suck, thereby can carry out swimmingly powder and solvent to the supply of centrifugal pump 6.

Centrifugal pump 6 is as long as stir and dissolve when the rotation by rotary wings 63A attracts powder and solvent, its structure is not particularly limited, but in the present embodiment, form as follows: in the inside of columnar housing 60, at the peripheral part of rotor 63 that is installed on the driving shaft of driving mechanism M, project a plurality of rotary wings 63A, by rotor 63 from sucting 61 inhalation of dusts and solvent to importing chamber 65 and stirring, from the portion of spuing 62 lysate that spues.

At this moment, housing 60 possesses housing body 60A cylindraceous and is equipped on the front side (in Fig. 8 (a) for left side) of housing body 60A and the housing 60B and below housing 60C above of rear side (being right side in Fig. 8 (a)), and in housing body 60A, being provided with spues stirs and the portion that spues 62 of the lysate that dissolves.

Above, housing 60B sets stator 64A cylindraceous in the mode between rotary wings 63A and importing chamber 65, by the open-work Sa, the Sb that are formed on this stator 64A, forms throttling runner So.

In addition, throttling runner So, except consisting of open-work, can also consist of slit or nozzle.

And, can set at the outer circumferential side of rotary wings 63A as required the stator 64B that forms open-work (being the slotted hole of slit-shaped in the present embodiment) as throttling runner So.

Thus, when through open-work, can make shearing force act on lysate by rotary wings, and can promote to dissolve.

And, the inner side of more close stator 64A in the inner side of rotary wings 63A, funnel shaped dividing plate 66 is fixed on rotor 63 by a plurality of lug boss 66a.

The parts that this dividing plate 66 is the importing chamber 65B that divides the part that imports the lysate that carries out the powder of initial stage mixing and the importing chamber 65A of solvent and spue from the portion of spuing 62 mixing nozzle 5 from a side's of sucting 61 the sucting 61A sucting 61B by the opposing party and circulate and be imported into, this dividing plate 66 becomes step-like maze-type structure with the sliding part of housing 60, can carry out swimmingly guide enter the room 65A inhalation of dust and solvent.

At this, importing chamber 65 is divided into import chamber 65A and import chamber 65B and forms, so in the present embodiment, as shown in Fig. 8 (b), about being formed on the open-work Sa of stator 64A, the shape of Sb, will with import the opposed open-work Sa of chamber 65A and be set as the not susceptible to plugging circle of powder, by with import the opposed open-work Sb of chamber 65B and be set as the ellipse that shearing force based on rotary wings easily acts on lysate.

In addition, the shape of open-work Sa, Sb can be according at random settings such as the proterties of the lysate of powder and solvent and circulation.

In the portion that spues 62 of centrifugal pump 6, arrange according to proportion lysate is separated into circulatory flow 76 and discharges the gas-liquid separation device 7 that runner 75 is supplied with.

In the present embodiment, as shown in Figure 9, this gas-liquid separation device 7 forms as follows: from the bottom surface of cylindrical vessel 70, to inside, give prominence to and set the ingress pipe 71 being connected with the portion that spues 62 of centrifugal pump 6, the top of cylindrical vessel 70 possesses the outlet 72 being connected with discharge runner 75, and in bottom, possess the circulation port 73 being connected with circulatory flow 76, at the end that spues of ingress pipe 71, set the blade 74 of the mobile convolution that makes the lysate that spues from ingress pipe 71.

In addition, can also replace blade 74 or set with the coexist top of the end that spues of ingress pipe 71 of blade 74 1 stirring vane that stirs the lysate spue from ingress pipe 71.

By this gas-liquid separation device 7 is set, can the larger not consoluet lysate composition of the proportion lysate composition that complete dissolving less with proportion is separated and be supplied to circulatory flow 76 and discharge runner 75 respectively, can prevent that not consoluet lysate composition is from discharging the operational efficiency that improves device when runner 75 is discharged.

And, between the powder outlet 12 of powder quantitative feeder 1 and the sucting 61B of centrifugal pump 6, set closure element 112.

This closure element 112 is for stopping powder to the member of sucting 61 suctions of centrifugal pump 6, in the present embodiment, at the front end of cylinder, set the dividing plate forming with the perforation of the roughly the same diameter of internal diameter of runner, and make dividing plate with respect to runner quadrature and the fast family of power and influence of movement.

As long as closure element 112 can stop powder to the suction of the sucting 61 of centrifugal pump 6, can be equipped on any part, in the present embodiment, between powder quantitative feeder 1 and mixing nozzle 5, set the fast family of power and influence.

And, can be provided for the pressure in hopper H to remain on the pressure-regulating valve 113 in predetermined pressure limit.

By this pressure-regulating valve 113, the pressure in hopper H can be remained in the pressure limit that the attraction of centrifugal pump 6 can not decline relatively, prevent that attraction from declining, and can prevent that powder is to hopper H adverse current simultaneously.

Then, the operation method of this powder dissolution device S4 is described.

First, stop powder quantitative feeder 1, stopping under the state of inhalation of dust by closure element 112, limit only starts the operation (solvent operation) of centrifugal pump 6 in donor solvent (for example water) limit from solvent supplying apparatus 4.

And, open closure element 112 under the state that stops powder quantitative feeder 1.

Thus, from the metering rotary body 2 of powder quantitative feeder 1 and the gap of housing 10, attract the gas in hopper H, will in the hopper H by the airtight powder of airtight member 110 input port Hb, be made as negative pressure state (degassed operation).

As shown in figure 10, by carrying out this degassed operation, pressure in hopper H (is for example maintained negative pressure,-0.05MPa), when attracting powder by centrifugal pump 6 from hopper H, can reduce the absolute magnitude that is together attracted to the gas of centrifugal pump 6 with powder, and can prevent that dissolved efficiency from declining because of sneaking into of gas.

And, can suppress the foaming of the lysate that the gas because being together attracted with powder causes, and can improve the quality of lysate.

This degassed operation can also be omitted as required.

In addition, in hopper H, set and possess the pipe arrangement of the filter of only allowing that gas passes and attract mechanism's (omitting diagram), by attracting the attraction of mechanism, do not carry out the degassed operation of the attraction based on centrifugal pump 6, can also will in hopper H, be made as negative pressure state.

And, by degassed operation, in by hopper H, be maintained under the state of negative pressure and make powder quantitative feeder 1 work, start to supply with powder (for example, powder) to centrifugal pump 6.

After powder and solvent carry out initial stage mixing in mixing nozzle 5, from the sucting 61A of centrifugal pump 6, be directed into importing chamber 65A.

And by through being formed at the open-work Sa that is provided in the inner side of rotary wings 63A and the stator 64A in outside and the open-work that is formed at stator 64B, edge joint is subject to shear action limit stirring and dissolving, and from the portion of spuing 62 spue (dissolving operation).

Now, from being maintained the hopper H of the state of negative pressure, attract powder, thereby under the state of the absolute magnitude of the gas being attracted in reduction, move centrifugal pump 6, can improve the efficiency of centrifugal pump 6, importing chamber 65A, 65B are made as to high vacuum state, make to cause cavitation through the open-work Sa that is formed on stator 64A as throttling runner So and the lysate that is formed on the open-work of stator 64B, by being contained in the expansion of the bubble in lysate and promoting to dissolve because of the impact of its generation.

The lysate spuing from the portion of spuing 62 is by gas-liquid separation device 7, the not consoluet lysate composition that proportion is larger passes through circulatory flow 76, from the sucting 61B of centrifugal pump 6, be directed into importing chamber 65B, pass the open-work that is formed on the open-work Sb of stator 64A and is formed on stator 64B, thereby edge joint is subject to shear action limit stirring and dissolving, from the portion of spuing 62, spue, on the other hand, the lysate composition that completes dissolving that proportion is less is discharged to next operation N by discharging runner 75.

And when completing the supply of scheduled volume powder, (at this moment, the supply of solvent also stops to close the suction of powder by closure element 112 simultaneously.), and continue operation centrifugal pump 6 until solvent is dissolved in (circular flow) in powder completely.

Thus, for example, when making dissolution with solvents in the larger powder of particle diameter or the higher powder of foaming characteristic, also in the time of can suppressing to dissolve, bubble, with higher efficiency of pump operation powder dissolution device, and can significantly shorten the required time of dissolving, can suppress because gas flows into the obstacle causing, and can disperse reliably and dissolve simultaneously.

Shown in Figure 11, the pressure in the hopper of powder dissolution device of the present invention is maintained to the variant embodiment of negative pressure.

This powder dissolution device S5 forms as follows: as for the pressure in hopper H being maintained to the member of negative pressure, in hopper H, set the powder feeding device 8 that possesses whizzer 80 and attract member 81, by this powder feeding device 8, to hopper H, supply with the powder that lodges in powder reservoir 82.

And, this powder dissolution device S5 is by attracting the attraction of member 81 that the powder that lodges in powder reservoir 82 is directed into whizzer 80, powder feeding separated from the gas, to the hopper H being sealed, and can be maintained to negative pressure by the pressure in hopper H.

Powder feeding device 8, is connected to the powder outlet 80a of whizzer 80 the powder input port Hb of airtight hopper H, gas discharge outlet 80b is connected in and attracts member 81, and powder introducing port 80c is connected in to powder reservoir 82.

Powder reservoir 82 forms as follows: in a hopper 82B, emit the powder accumulating in groove 82A, from a hopper 82B, by the supply member 82C such as revolving valve, pipe arrangement 82D, send.

The attraction member 81 being connected with the gas discharge outlet 80b of whizzer 80 is not particularly limited, and can utilize vavuum pump etc., as required can also and gas discharge outlet 80b between further set whizzer 83.

This powder dissolution device S5 can attract the powder that comprises the gas that lodges in powder reservoir 82 by enough attraction members 81, and will use the powder feeding of whizzer 80 separation to hopper H, so while moving continuously, also can suppress gas and flow into from outside to hopper H, and the pressure in hopper H is maintained to negative pressure.

And, be configured to from the groove 82A that accumulates of powder and to whizzer 80, supply with powder by pipe arrangement 82D, thus can supply with powder from the position away from centrifugal pump 6, and can not produce the dissolving operation of the powder of dust.

In addition, other formations of the present embodiment and effect are identical with the embodiment recording in above-mentioned Fig. 6～Figure 10.

Above, according to embodiment, powder quantitative feeder of the present invention and the powder dissolution device that possesses this powder quantitative feeder are illustrated, but the structure that the invention is not restricted to record in above-described embodiment can suitably change its structure in the scope that does not depart from its aim.

Utilizability in industry

Powder quantitative feeder of the present invention has following characteristic, can avoid powder to adhere to and be deposited in the powder throughput of flow regulating part, make the stability of flow of powder, and predetermined amounts is supplied with powder continuously, and can prevent because sneak into supplied with powder with gas, and, the powder dissolution device that possesses powder quantitative feeder of the present invention has following characteristic: can maintain with pinpoint accuracy the solubility of powder, and can improve dissolved efficiency by reducing the bubble producing because of the gas of sneaking in powder, so can be widely used in at food, pharmaceuticals, in the weigh feeder of various powder and the purposes of powder dissolution device that the stronger powder of coherency using in the manufacture of chemicals etc. is representative.

Symbol description:

1-powder quantitative feeder, 10-housing, 11-powder feeding mouth, 12-powder outlet, 13-expanding chamber, 14-gas introduction part, 2-measures rotary body, 20-powder accommodating chamber, 21-next door, 3-closure of openings parts, 4-solvent supplying apparatus, 5-mixing nozzle, 6-centrifugal pump, the primary side of 6a-centrifugal pump, 7-gas-liquid separation device, 8-powder feeding device, 80-whizzer, 81-attracts member, 82-powder reservoir, 9-centrifugal separating device, the airtight member of 110-, 111-cover, 112-closure element, 113-pressure-regulating valve, H-hopper, Ha-outlet, Hb-input port, M-driving mechanism, S-powder dissolution device, S1-powder dissolution device, S2-powder dissolution device, S3-powder dissolution device, S4-powder dissolution device, S5-powder dissolution device.

Claims

1. a powder quantitative feeder, this device comprises:

Housing, possesses powder feeding mouth and powder outlet;

Metering rotary body uniformly-spaced arranges a plurality of powder accommodating chambers, and is rotatably provided in housing on circumferentially; And

Driving mechanism, rotarilys actuate metering rotary body, it is characterized in that, forms as follows:

Position in the described housing being released at the powder that is given to the powder accommodating chamber of metering rotary body from powder feeding confession, by the attraction by the effect of powder outlet, formation maintains than the powder feeding mouth expanding chamber of low pressure more, rotation along with metering rotary body, the expanding chamber open state of the state of each powder accommodating chamber to open to expanding chamber, the 1st air-tight state not being communicated with expanding chamber and powder feeding mouth, the powder feeding mouth open state of opening to powder feeding mouth, and the reiteration of the 2nd air-tight state not being communicated with powder feeding mouth and expanding chamber changes, to form described powder accommodating chamber at the metering outer peripheral face of rotary body and the mode of central part opening, the mode of sealing under the 1st air-tight state and the 2nd air-tight state with the opening of outer peripheral face side of metering rotary body forms housing, and with the opening of central part side of metering rotary body at the 1st air-tight state, the mode being closed under powder feeding mouth open state and the 2nd air-tight state, make closure of openings parts relatively measure the central part of rotary body and be provided in housing, and, when at least 1 powder accommodating chamber is when forming the opening of outer peripheral face side of metering rotary body of this powder accommodating chamber and the untight expanding chamber open state of opening of central part side, be positioned at the untight expanding chamber open state of opening that becomes the central part side of only having the metering rotary body that forms this powder accommodating chamber than at least 1 powder accommodating chamber of more close the 2nd air-tight state side of this powder accommodating chamber.

2. powder quantitative feeder as claimed in claim 1, is characterized in that,

Possesses the hopper that accumulates the powder that is supplied to powder feeding mouth, this hopper is del, from the summit being positioned at bottom, along 1 limit passing through this summit, form the powder feeding mouth of slit-shaped, and vertical formation, do not comprise the wall on the limit that has formed this powder feeding mouth.

3. a powder dissolution device, is characterized in that,

Possess powder quantitative feeder as claimed in claim 1 or 2, the primary side of centrifugal pump is connected in to powder outlet and makes attraction force acts attract powder in expanding chamber, and attracted powder is mixed with liquid in centrifugal pump.

4. powder dissolution device as claimed in claim 3, is characterized in that,

Pressure in described hopper is maintained to negative pressure, and makes powder be attracted to centrifugal pump in the hopper of this negative pressure state by the attraction of centrifugal pump.

5. powder dissolution device as claimed in claim 4, is characterized in that,

The airtight member of the powder input port of airtight described hopper is set.

6. powder dissolution device as claimed in claim 4, is characterized in that,

By possessing whizzer and attracting the powder feeding device of member, by the powder feeding that lodges in powder reservoir to described hopper.

7. the powder dissolution device as described in any one in claim 4,5 or 6, is characterized in that,

Pressure-regulating valve in described hopper is provided for the pressure in hopper to remain on the pressure limit that the attraction of centrifugal pump do not have relatively to decline.