JP6128436B2 - Powder melting device - Google Patents

Description

  The present invention relates to a powder dissolving apparatus, and more particularly to a powder dissolving apparatus for dissolving powder into a liquid in a dissolution tank.

Conventionally, powder is accurately weighed and dissolved in a predetermined amount of liquid to prepare a solution. For example, in artificial dialysis treatment, A powder containing sodium chloride as a main component and sodium bicarbonate The dialysis fluid is prepared by dissolving dialysis A stock solution and dialysis B stock solution at predetermined ratios, respectively, and mixing these at a predetermined ratio.
As a powder dissolving apparatus for dissolving the powder in purified water, a device having a configuration in which the powder sent out from the powder storage tank is measured and the measured powder is put into the dissolving tank is known (Patent Document). 1).

Japanese Patent Laid-Open No. 4-300637

However, the powder dissolving apparatus of Patent Document 1 is configured to measure the powder discharged from the powder storage tank by the measuring means (33) and then transport the powder to the dissolving tank by a screw.
For this reason, during conveyance by this screw, powder adheres to the solute guide tube (33c) provided with the screw and the screw, and all of the measured powder may not be put into the dissolution tank. When the powder is dissolved in purified water, there is a problem that a solution having a predetermined concentration cannot be obtained.
Further, since there is a gap between the receiving member of the measuring means and the dissolution tank, the powder may be scattered when the powder is charged, and not all of the measured powder may be charged into the dissolution tank.
In particular, covering the gap with a cover or the like cannot affect the measurement, and it has been difficult to prevent the powder from scattering.
In view of such problems, the present invention provides a powder dissolving apparatus capable of managing the concentration of a dissolving solution with higher accuracy.

That is, the powder melting apparatus according to the present invention is provided with a delivery means for delivering powder from the powder storage tank, a weighing hopper disposed below the delivery portion of the delivery means and receiving the delivered powder, and disposed under the weighing hopper. A melting tank in which a feeding portion into which powder is fed from a weighing hopper is formed, and a weighing means for weighing the powder by measuring the weight of the weighing hopper, and the powder measured by the weighing hopper is dissolved in the melting hopper. A powder dissolving device that is charged into a tank and dissolved in a liquid,
The weighing hopper has an upper opening and a lower opening, and includes a lower opening opening / closing means for opening and closing the lower opening,
Furthermore, upper connecting means for connecting the upper opening of the weighing hopper and the delivery section by relatively approaching the weighing hopper and the delivery section of the delivery means, the weighing hopper and the charging tank input section, A lower connection means for connecting the lower opening of the weighing hopper and the input part with relatively close to each other,
When the feeding means sends the powder to the weighing hopper, the lower opening is closed by the lower opening opening / closing means, and the upper opening of the weighing hopper and the sending portion of the sending means are connected by the upper connecting means age,
Further, when the powder in the weighing hopper is thrown into the dissolution tank by opening the lower opening opening / closing means, the lower opening of the weighing hopper is connected to the charging portion by the lower connecting means,
Further, when the weight of the weighing hopper is measured by the weighing means after the powder is fed from the feeding means to the weighing hopper, the upper opening of the weighing hopper is separated from the feeding portion, and the lower portion of the weighing hopper is It is characterized in that the opening and the input portion are separated from each other.

According to the invention, when the weight of the powder in the weighing hopper is weighed by the weighing means, the upper opening of the weighing hopper is separated from the delivery portion, and the lower opening and the feeding portion of the weighing hopper are separated from each other. Since they are separated, the weight of the powder stored in the weighing hopper can be accurately measured.
On the other hand, when the delivery means sends out the powder to the weighing hopper, the lower opening is closed by the lower opening opening / closing means, and the upper opening of the weighing hopper is connected to the delivery portion of the delivery means by the upper connection means. Thus, scattering of the powder can be prevented.
Furthermore, when the lower opening opening / closing means is opened and the powder in the weighing hopper is charged into the melting tank, the lower opening of the weighing hopper is connected to the charging portion by the lower connecting means, thereby scattering the powder. Can be prevented.

Configuration diagram of powder melting apparatus according to the present embodiment Side view explaining the weighing unit Operational diagram of the weighing unit Operation diagram for cleaning powder melting equipment

The illustrated embodiment will be described below. FIG. 1 shows a powder dissolving apparatus 1 for preparing a solution by dissolving powder for adjusting dialysate in purified water.
The powder dissolution apparatus 1 includes a powder storage tank 2 for storing powder, a screw feeder 3 as a delivery means for sending powder from the powder storage tank 2, a dissolution tank 4 into which powder is charged, and the dissolution tank 4 A liquid supply circuit 5 for supplying purified water and supplying the prepared solution to a dialysate mixing device (not shown), and a metering device provided between the powder storage tank 2 and the dissolution tank 4 for measuring powder. A unit 6 and a cleaning means 7 for cleaning the powder container 2 and the measuring unit 6 are provided, which are controlled by a control means (not shown).
In the powder dissolving apparatus 1, the screw feeder 3 sends the powder from the powder storage tank 2 to the measuring unit 6, and then the powder is measured by the measuring unit 6, and then the powder is put into the dissolving tank 4. Thus, it is possible to dissolve the powder accurately measured in the measuring unit 6 in purified water.

The powder storage tank 2 stores the powder. As shown in FIG. 2, a guide passage 2 a is formed at the bottom of the powder storage tank 2 so as to protrude sideways and store the screw feeder 3.
The screw feeder 3 is provided so as to cross the lower part of the powder container 2 and includes a screw 3a having a tip portion inserted into the guide passage 2a, and a motor 3b for rotating the screw 3a. A cylindrical delivery passage 8 is provided on the lower surface of the end of the guide passage 2a of the powder storage tank 2 as a delivery section for delivering the powder downward.
The delivery passage 8 is composed of two tubular members having different diameters, and an upper member 8a is fixed to the guide passage 2a, and a lower member 8b is provided so as to be movable up and down with respect to the upper member 8a. In addition, a delivery port 8c is formed at the lower end.
When the motor 3b rotates the screw 3a, the powder in the powder container 2 is fed into the guide passage 2a by the screw 3a, and this powder is sent from the delivery port 8c through the delivery passage 8. It is sent out to the said measurement part 6 below.
The control means controls the rotation speed of the motor 3b, so that a predetermined amount of powder can be sent out from the delivery passage 8 by the screw 3a.

The dissolution tank 4 has a volume capable of storing a predetermined amount of liquid, and a cover surface provided at an upper portion thereof is formed with a charging port 4a as a charging unit into which the powder is charged. 4a is located directly below the delivery port 8c of the delivery passage 8.
The dissolution tank 4 includes a circulation passage 11 whose both ends are connected to the bottom and sides of the dissolution tank 4 and a liquid feed pump 12 provided in the circulation passage 11.
The liquid feed pump 12 discharges the liquid from the bottom of the dissolution tank 4 through the circulation passage 11 and allows the liquid circulated through the circulation passage 11 to flow again from the side of the dissolution tank 4. .
The liquid supply circuit 5 includes a water supply passage 13 for supplying purified water to the dissolution tank 4 from a purified water supply means (not shown), and a liquid supply passage for supplying the solution prepared in the dissolution tank 4 to the dialysate mixing device. 14 and a waste liquid passage 15 for discarding the liquid in the dissolution tank 4.
The water supply passage 13 and the waste liquid passage 15 are connected between the liquid feed pump 12 and the bottom end of the dissolution tank 4 in the circulation passage 11, and the liquid feed passage 14 is connected to the liquid feed pump 12 and the dissolution tank 4. Connected to the end portion of the side portion.
Further, the circulation passage 11 is provided with a first on-off valve V1, the water supply passage 13 is provided with a second on-off valve V2, the liquid feed passage 14 is provided with a third on-off valve V3, and the waste liquid passage 15 is provided with a fourth on-off valve V4. These are controlled to be opened and closed by the control means.

Next, as shown in FIG. 2, the weighing unit 6 includes a weighing hopper 21 having an upper opening 21a and a lower opening 21b, support means 22 for supporting the weighing hopper 21 in a raised position and a lowered position, and the weighing Weighing means 23 for weighing the hopper 21, an upper lid member 24 provided in the delivery passage 8, an outlet opening / closing means 25 for opening and closing the delivery passage 8, and the upper lid member 24 in the raised position and the lowered position A lid member elevating means 26 for elevating and lowering, a lower lid member 27 provided at a lower portion of the weighing hopper 21, and a lower opening opening / closing means 28 for opening and closing the lower opening 21b of the weighing hopper 21.
The weighing hopper 21 is a substantially funnel-shaped cylindrical body made of stainless steel whose diameter is reduced downward, and the inner surface thereof is processed smoothly so that powder does not adhere.
The upper opening 21 a of the weighing hopper 21 is located below the delivery port 8 c of the delivery passage 8, and the lower opening 21 b is located above the charging port 4 a of the dissolution tank 4.

The supporting means 22 for supporting the weighing hopper 21 is provided with a supporting member 31 fixed to the upper part of the dissolution tank 4, and an attachment provided on the supporting member 31 to urge the weighing hopper 21 to support it in the raised position. The weighing means 23 is provided between the support member 31 and the urging means 32.
The support member 31 is provided with a slide rail 31a in the vertical direction, and a slide member 33 is provided on the side surface of the weighing hopper 21 so as to be movable up and down along the slide rail 31a.
The weighing means 23 is a conventionally known load cell, one end of which is fixed to the support member 31, and the biasing means 32 is provided on the upper surface of the other end.
The urging means 32 includes a spring rod 34 provided on the upper surface of the other end of the load cell, a spring presser 33a provided on the slide member 33 and moving up and down along the spring rod 34, and the spring presser It is comprised from the spring 35 which urges | biases 33a upwards.
A locking member 34a is provided at the upper end of the spring rod 34 so as to abut against the spring retainer 33a to prevent the slide member 33 from rising, and a ring-shaped spring receiver 34b is provided near the lower end.
The spring 35 is elastically mounted between a spring retainer 33a of the slide member 33 and a spring receiver 34b of the spring rod 34. Normally, the spring retainer 33a is moved by the biasing force of the spring 35 as shown in FIG. The weighing hopper 21 is supported at the raised position by contacting the locking member 34a.
On the other hand, the weighing hopper 21 can be moved downward against the urging force of the spring 35 of the urging means 32, and the lid member elevating means 26 is connected to the upper lid member as will be described later. 24 is brought into contact with the weighing hopper 21 to push down the weighing hopper 21.

The weighing means 23 measures the weight of the powder put into the weighing hopper 21 based on the load of the weighing hopper 21 acting on the biasing means 32.
More specifically, the load of the weighing hopper 21 acts on the other end portion of the load cell as the weighing means 23 via the spring 35 in the biasing means 32. When the load cell is distorted by this load, The load is calculated based on the amount of strain.
For this reason, when powder is put into the weighing hopper 21, the weight of the charged powder also acts on the weighing means 23 via the biasing means 32, so that the weight of the charged powder is measured. It is also possible.

Next, the upper lid member 24 is formed so as to be fixed to the lower member 8b constituting the delivery portion 8A of the delivery passage 8 and to surround the delivery port 8c, and the upper opening of the weighing hopper 21 It has a shape capable of coming into contact with and closing the peripheral edge of 21a.
The outlet opening / closing means 25 is provided in the upper lid member 24, and the upper opening / closing door 25a for closing the outlet 8c of the delivery passage 8 and the upper lid member 24 are also provided in the upper lid member 24a. The opening / closing motor 25b is configured to open and close the upper opening / closing door 25a by rotating a support shaft provided at the side end of the upper opening / closing door 25a.
The lid member elevating means 26 is an air cylinder that is fixed to the support member 31 and raises and lowers the upper lid member 24. The upper lid member 24 is moved upward along the member 8 above the delivery passage 8 ( 2 and 3B) and a lowered position (see FIGS. 3A and 3C).
The upper lid member 24 and the lid member lifting / lowering means 26 constitute an upper connection means 24A for connecting the upper opening 21a of the weighing hopper 21 and the delivery port 8c as the delivery part.

Next, the lower lid member 27 is a cylindrical member that is fixed to the weighing hopper 21 and is provided so as to surround the lower opening 21b. It has a shape capable of abutting and closing the peripheral edge of 4a.
When the lid member lifting / lowering means 26 brings the upper lid member 24 into contact with the weighing hopper 21 and further pushes down the weighing hopper 21, the lower lid member 27 reaches the lowered position where it contacts the charging port 4 a of the dissolution tank 4. It descends (see FIGS. 3A and 3C).
The lower lid member 27, the lid member lifting / lowering means 26, the support means 22, and the urging means 32 constitute a lower connecting means 27A for connecting the lower opening 21b of the weighing hopper 21 and the charging port 4a as the charging part. doing.

The lower opening opening / closing means 28 is provided in the lower lid member 27 and closes the lower opening 21b of the weighing hopper 21. The lower opening / closing means 28 is provided in the dissolution tank 4 adjacent to the weighing hopper 21. It comprises driving means 42 for driving the lower opening / closing door 41.
The lower opening / closing door 41 is pivotally supported inside the lower lid member 27 by a rotating shaft 41a. In the closed state, the lower opening 21b of the weighing hopper 21 is closed to close the powder in the weighing hopper 21. It is designed to prevent the fall.
The rotating shaft 41a protrudes outside the lower lid member 27, and the driving means 42 rotates the rotating shaft 41a from the outside so that the lower lid member 27 blocks the charging port 4a of the dissolution tank 4. Even so, it can be opened and closed.

The drive means 42 includes a support member 43 fixed on the lid surface of the dissolution tank 4, a reciprocating member 44 provided on the support member 43 and moving forward and backward with respect to the weighing hopper 21, and the reciprocating member 44. And an opening / closing link 46 for opening / closing the lower opening / closing door 41.
The reciprocating member 44 is provided so as to be able to reciprocate in the horizontal direction along a slide rail 43a provided on the support member 43, and a first cam groove 44a and a second cam groove 44b are formed on the side surfaces in the advancing and retreating direction. Has been.
The opening / closing motor 45 is fixed to the support member 43 above the reciprocating member 44, and one end of a first arm member 47 is fixed to the rotational drive shaft. The other end of the first arm member 47 is provided with a first cam roller 47a that is guided up and down along a first cam groove 44a on the left side of the reciprocating member 44 that is far from the measuring hopper 21 in the drawing.
The opening / closing link 46 includes an opening / closing arm 46 a that is connected to the rotating shaft 41 a of the lower opening / closing door 41 that protrudes outside the lower lid member 27, and one end that is rotatably supported on the outer peripheral surface of the lower lid member 27. The parallel arm 46b, a support plate 46c that rotatably supports the open / close arm 46a and the parallel arm 46b in parallel, and the support plate 46c, which is close to the weighing hopper 21 of the reciprocating member 44. The second cam roller 46d is guided up and down along the second cam groove 44b on the right side of the figure.
Further, between the shaft support portion of the opening / closing arm 46 a with the support plate 46 and the side surface of the weighing hopper 21, a tension spring 48 having both end portions rotatably supported is stretched. The shaft support portion of the opening / closing arm 46a is pulled upward.

According to the driving means 42 having such a configuration, when the opening / closing motor 45 rotates the first arm member 47 forward and backward about one end, the first cam roller 47a provided on the first arm member 47 is provided. Moves the reciprocating member 44 in the left-right lateral direction while allowing vertical movement through the first cam groove 44a.
When the reciprocating member 44 moves to the left and right, the second cam groove 44b of the reciprocating member 44 moves in the left and right lateral directions, so that the second cam groove 44b is allowed to move up and down through the second cam roller 46d. The support plate 46c of the opening / closing link 46 is moved in the horizontal direction.
When the support plate 46c moves in the left-right lateral direction, the parallel opening / closing arm 46a and the parallel arm 46b are swung to the left and right around a vertically upright state. At this time, the support plate 46 is pulled up by the tension spring 48 at the shaft support portion of the opening / closing arm 46a, so that the horizontal state is maintained by the parallel opening / closing arm 46a and the parallel arm 46b while moving in the horizontal direction with the vertical movement. Moved.
Thus, the open / close arm 46a swings to the left and right as the support plate 46 moves laterally, whereby the rotating shaft 41a connected to the open / close arm 46a rotates to open and close the lower open / close door 41.
Such an open / close link 46 is attached to the weighing hopper 21 and the lower lid member 27, and when the weighing hopper 21 moves up and down, it is moved up and down integrally. The reciprocating member 44 provided on the support member 43 fixed on the surface is connected with the second cam groove 44b and the second cam roller 46d in a state in which the vertical movement is allowed. It is possible to maintain the closed state of the lower opening / closing door 41 without hindering the vertical movement.

The cleaning means 7 branches from the cleaning agent passage 51 connected to the water supply passage 13, the powder storage tank cleaning passage 52 branched from the water supply passage 13 and connected to the powder storage tank 2, and branched from the water supply passage 13. And a measuring section cleaning passage 53 connected to the dissolution tank 4.
The cleaning agent passage 51 is connected to a cleaning agent bottle 54 in which the cleaning agent is stored, and the cleaning agent passage 51 is provided with a fifth on-off valve V5 that is opened and closed by control means.
The powder storage tank cleaning passage 52 is connected to a shower head 55 provided on the wall surface of the powder storage tank 2, and the liquid sprayed from the shower head 55 cleans the entire wall surface inside the powder storage tank 2. It is possible to do.
The measuring unit cleaning passage 53 is connected to an injection nozzle 56 serving as a cleaning medium injection unit provided in the dissolution tank 4. The injection nozzle 56 is directed toward the inside of the measuring hopper 21 of the measuring unit 6. The melting tank 4 is provided so as to face outward from the charging port 4a.
The powder container cleaning passage 52 and the metering portion cleaning passage 53 are provided with sixth and seventh on-off valves V6 and V7 that are opened and closed by the control means, respectively.

The operation of the powder melting apparatus 1 having the above configuration will be described with reference to FIG. 3. First, as shown in FIG. 3A, the lid member elevating means 26 positions the upper lid member 24 in the lowered position. .
As a result, the upper lid member 24 closes the upper opening 21a of the weighing hopper 21, and the weighing hopper 21 is pushed down against the urging force of the urging means 32 to be in the lowered position. A lid member 27 closes the charging port 4 a of the dissolution tank 4.
With the upper lid member 24 and the weighing hopper 21 positioned at the lowered position, the upper opening / closing door 25a of the delivery opening / closing means 25 closes the delivery opening 8c of the delivery passage 8 and the lower opening / closing means 28 The open / close door 41 is in a state where the lower opening 21b of the weighing hopper 21 is closed.
In this state, the opening / closing motor 25b of the outlet opening / closing means 25 is operated to open the upper opening / closing door 25a, and the screw feeder 3 is operated in the powder storage tank 2 to feed a predetermined amount of powder from the outlet 8c. The powder is fed into the weighing hopper 21, and the powder is prevented from dropping inside the weighing hopper 21 by the lower opening / closing door 41.
At this time, since the upper opening 21a of the weighing hopper 21 is closed by the upper lid member 24, even if the powder rises in the weighing hopper 21 when the powder falls from the delivery passage 8, the weighing hopper 21 21 is not scattered outside.
When the introduction of the powder is completed, the screw feeder 3 is stopped, and the upper opening / closing door 25a of the outlet opening / closing means 25 closes the outlet 8c of the delivery passage 8.

Next, as shown in FIG. 3B, the lid member elevating means 26 raises the upper lid member 24 to the raised position.
When the upper lid member 24 is in the raised position, the weighing hopper 21 is raised to the raised position by the urging force of the urging means 32 in the support means 22, and the lower lid member 27 is moved to the inlet 4 a of the dissolution tank 4. Separate upward. The upper lid member 24 is separated further upward than the upper opening 21a of the weighing hopper 21 located at the raised position.
With the upper lid member 24 and the weighing hopper 21 in the raised position and the lower opening / closing door 41 of the lower opening opening / closing means 28 closing the lower opening 21b, the weighing means 23 has a weight of the weighing hopper 21. , And the weight of the powder put into the weighing hopper 21 is weighed.
Specifically, the load cell as the weighing means 23 is subjected to the total load of the weighing hopper 21 and the powder via the biasing means 32, while the control means has a previously measured weighing hopper. Since the weight of 21 is registered, the control means calculates the weight of the powder from these differences.

When the weight of the powder in the weighing hopper 21 is weighed, the lid member elevating means 26 places the upper lid member 24 in the lowered position again as shown in FIG.
As a result, the upper lid member 24 closes the upper opening 21a of the weighing hopper 21, and the weighing hopper 21 is pushed down against the urging force of the urging means 32, and is positioned at the lowered position so that the lower lid The member 27 will block the charging port 4a of the dissolution tank 4.
When the upper lid member 24 and the weighing hopper 21 are in the lowered position, the opening / closing motor 45 of the lower opening opening / closing means 28 is operated to open the lower opening / closing door 41, thereby opening the lower opening 21b of the weighing hopper 21. Then, the powder in the weighing hopper 21 is dropped into the dissolution tank 4 from the charging port 4a.
At this time, the upper lid member 24 closes the upper opening 21a of the weighing hopper 21, and the lower lid member 27 also closes the inlet 4a of the dissolution tank 4, so that the powder charged into the dissolution tank 4 rises. However, the powder is not scattered outside the weighing hopper 21, and all of the measured powder can be put into the dissolution tank 4.

When powder is put into the dissolution tank 4, the second on-off valve V <b> 2 of the liquid supply circuit 5 is opened and the purified water is circulated through the water supply passage 13 without operating the liquid supply pump 12. Supply clean water from the bottom.
The control means opens the second on-off valve V2 for a predetermined time to supply a predetermined amount of purified water so as to dissolve with an appropriate amount of purified water according to the weight of the powder measured by the measuring unit 6.
Thereafter, the liquid feed pump 12 circulates the liquid in the dissolution tank 4 and the circulation passage 11, whereby the liquid in the dissolution tank 4 is agitated, and the powder is dissolved in purified water to create a solution having a predetermined concentration. It is like that.
That is, by controlling the amount of purified water supplied to the dissolution tank 4 according to the weight of the powder measured by the measuring unit 6, it is possible to create a solution with higher accuracy.
When a solution having a predetermined concentration is prepared in the dissolution tank 4, the third on-off valve V3 is opened, and the solution in the dissolution tank 4 is supplied to a dialysate mixing device (not shown).

Next, the time of cleaning the powder dissolving apparatus 1 will be described with reference to FIG. FIG. 4A illustrates a case where the measuring unit 6 is cleaned, and FIG. 4B illustrates a case where the powder container 2 is cleaned. For example, the measuring unit 6 is cleaned every day, and the powder container 2 is cleaned every week.
In FIG. 4A, when cleaning the weighing unit 6, the upper lid member 24 is positioned in the lowered position, the upper lid member 24 closes the upper opening 21 a of the weighing hopper 21, and the lower lid member 27 The inlet 4a of the dissolution tank 4 is closed.
In this state, the upper opening / closing door 25a of the delivery port opening / closing means 25 is closed, the lower opening / closing door 41 of the lower opening opening / closing means 28 is opened, and the seventh opening / closing valve V7 of the measuring section cleaning passage 53 is opened to dissolve. Purified water as a cleaning medium is supplied to an injection nozzle 56 provided inside the tank 4.
Since the injection nozzle 56 is provided below the charging port 4a of the dissolution tank 4 and sprays purified water upward, the injected purified water passes through the opened charging port 4a and the lower opening 21b, and the inside of the weighing hopper 21. And the inner surface of the weighing hopper 21 is washed, and the washed liquid is discharged to the dissolution tank 4.
At that time, since the delivery port 8c of the delivery passage 8 is closed by the upper opening / closing door 25a of the delivery port opening / closing means 25, the purified water is prevented from entering the powder storage tank 2 from the delivery passage 8. Accordingly, the measuring unit 6 can be cleaned while the powder is stored in the powder storage tank 2.

Next, as shown in FIG. 4 (b), when cleaning the powder container 2, the upper lid member 24 and the weighing hopper 21 are positioned at the lowered position, and the upper lid member 24 moves the upper portion of the weighing hopper 21. The opening 21 a is closed and the charging port 4 a of the dissolution tank 4 is closed by the lower lid member 27.
On the other hand, the outlet 8c is opened by the outlet opening / closing means 25, and the lower opening 21b of the weighing hopper 21 is opened by the lower opening opening / closing means 28.
In this state, when the sixth on-off valve V6 of the powder storage tank cleaning passage 52 is opened and purified water is supplied to the shower head 55 provided in the powder storage tank 2, the powder is stored by the purified water sprayed from the shower head 55. The inside of the tank 2 is cleaned.
The liquid used for washing is then discharged from the delivery port 8c of the delivery passage 8 to the weighing hopper 21 and falls to the dissolution tank 4 from the lower opening 21b of the weighing hopper 21.
In addition, when the measuring unit 6 and the powder storage tank 2 are cleaned, the dissolution tank 4 is also cleaned at the same time, and the second on-off valve V2 and the fifth on-off valve V5 in the cleaning agent passage. Is opened, and the cleaning agent in the cleaning agent bottle 54 is circulated in the circulation passage 11 and the dissolution tank 4 together with purified water.

In the above embodiment, after the state shown in FIG. 3C, that is, after the powder is weighed by the weighing means 23, the powder is put into the dissolution tank 4, and then, as shown in FIG. The weight of 21 may be measured.
That is, when the powder is charged into the dissolution tank 4 in FIG. 3C, some of the powder may remain attached to the inner surface of the weighing hopper 21 and the like, so the weight of the weighing hopper 21 is measured. Thus, the weight of the remaining powder can be grasped, and the weight of the powder actually dropped onto the dissolution tank 4 can be calculated.

Furthermore, the upper connection means 24A for connecting the upper opening 21a of the weighing hopper 21 and the delivery port 8c as the delivery part, and the lower connection means 27A for connecting the lower opening 21b and the entry port 4a as the introduction part. The configuration is not limited to the configuration described in the above embodiment.
That is, the upper connecting means 24A is configured to connect the upper opening 21a of the weighing hopper 21 and the delivery section by relatively bringing the weighing hopper 21 and the delivery section of the delivery means 3 close to each other. That's fine. a Similarly, the lower connecting means 27A is configured to connect the lower opening 21b of the weighing hopper 21 and the charging portion by relatively moving the weighing hopper 21 and the charging portion of the melting tank 4 relatively close to each other. do it.
For example, the upper lid member 24 is fixed to the weighing hopper 21, an upper opening 21 a is formed at the center of the upper lid member 24, and the lower member 8 b of the delivery passage 8 to which the upper lid member 24 is not connected. It is good also as a structure which connects these by moving up and down, or connection like the member 8b of the lower part of the said delivery path 8 toward the upper delivery path 8 from the upper cover member 24 fixed to the measurement hopper 21 It is good also as a structure which extends and connects a channel | path.
Further, as the charging part of the dissolution tank 4, a member formed with the charging port 4 a is moved up and down like the delivery passage 8, and the lower opening 21 b of the weighing hopper 21 and the above are moved by moving the member up and down. It is also possible to connect the input section.
In this case, since it is only necessary to move the sending part and the feeding part up and down, the supporting means and the urging means in the above embodiment can be omitted so that the weighing hopper 21 is not moved up and down. Can be directly supported by the weighing means 23 and its weight can be measured.
In addition to the lid member raising / lowering means 26 for raising and lowering the upper lid member 24, an air cylinder for lowering the weighing hopper 32 against the biasing means 32 is provided, and the air cylinder is attached to the weighing hopper 21. It is good also as a lid member raising / lowering means pushed down against the urging force of the urging means.

DESCRIPTION OF SYMBOLS 1 Powder dissolution apparatus 2 Powder storage tank 3 Screw feeder (delivery means) 4 Dissolution tank 4a Input port 8 Delivery passage 8c Outlet 21 Weighing hopper 21a Upper opening 21b Lower opening 22 Support means 23 Weighing means 24 Upper lid member 24A Upper connection means 25 Outlet opening / closing means 26 Lid member lifting / lowering means 27 Lower lid member 27A Lower connection means 28 Lower opening opening / closing means 32 Energizing means 56 Injection nozzle

Claims (6)

Delivery means for delivering the powder from the powder storage tank, a weighing hopper arranged below the delivery part of the delivery means for receiving the delivered powder, and an input for placing the powder from the weighing hopper arranged below the weighing hopper A dissolution tank in which a portion is formed and a measuring means for measuring the weight of the powder by measuring the weight of the measuring hopper, and the powder measured by the measuring hopper is put into the dissolving tank and dissolved in the liquid A melting device,
The weighing hopper has an upper opening and a lower opening, and includes a lower opening opening / closing means for opening and closing the lower opening,
Furthermore, upper connecting means for connecting the upper opening of the weighing hopper and the delivery section by relatively approaching the weighing hopper and the delivery section of the delivery means, the weighing hopper and the charging tank input section, A lower connection means for connecting the lower opening of the weighing hopper and the input part with relatively close to each other,
When the feeding means sends the powder to the weighing hopper, the lower opening is closed by the lower opening opening / closing means, and the upper opening of the weighing hopper and the sending portion of the sending means are connected by the upper connecting means age,
Further, when the powder in the weighing hopper is thrown into the dissolution tank by opening the lower opening opening / closing means, the lower opening of the weighing hopper is connected to the charging portion by the lower connecting means,
Further, when the weight of the weighing hopper is measured by the weighing means after the powder is fed from the feeding means to the weighing hopper, the upper opening of the weighing hopper is separated from the feeding portion, and the lower portion of the weighing hopper is A powder dissolution apparatus characterized in that an opening and a charging part are separated from each other. The upper connecting means is provided so as to be able to move up and down around a delivery port formed in the delivery part, and further, an upper lid member for closing the upper opening of the weighing hopper, and a lid member for moving the upper lid member up and down Elevating means,
The upper opening of the weighing hopper is connected to the delivery port by lowering the upper lid by the lid raising / lowering means and closing the upper opening of the weighing hopper with the upper lid member. 2. The powder dissolving apparatus according to 1. The lower connecting means is provided in the weighing hopper so as to surround the lower opening and closes the charging port formed in the charging tank charging unit, and the weighing hopper is moved up and down above the charging port. Support means for movably supporting; urging means for urging the weighing hopper supported by the supporting means; and lid member elevating means for pushing the weighing hopper against the urging force of the urging means; With
The weighing hopper is pushed down against the urging force of the urging means by the lid member elevating means, and the lower lid member provided on the weighing hopper is lowered to close the inlet of the melting tank, thereby closing the weighing hopper 3. The powder dissolving apparatus according to claim 1, wherein the lower opening is connected to the charging portion. 4. Lid member raising / lowering means for moving the upper lid member up and down as lid member raising / lowering means for pushing down the weighing hopper against the urging force of the urging means,
When the lid member raising / lowering means lowers the upper lid member to close the upper opening of the weighing hopper, the upper lid member is further lowered to push down the weighing hopper against the urging force of the urging means, and the weighing hopper The powder dissolving apparatus according to claim 3, wherein a charging port of the dissolution tank is closed by a lower lid member provided in the container.   The powder dissolving apparatus according to any one of claims 1 to 4, further comprising a delivery opening / closing means for opening / closing a delivery opening formed in a delivery section of the delivery means. A cleaning medium spraying means for spraying a cleaning medium from the charging port formed in the charging unit to the outside is provided in the dissolution tank,
When cleaning the inside of the weighing hopper, the outlet is closed by the outlet opening / closing means, the lower opening is opened by the lower opening opening / closing means, and the upper portion of the weighing hopper is opened by the upper connection means. While connecting the opening and the delivery part, and connecting the lower opening of the weighing hopper and the input part by the lower connection means,
6. The powder dissolving apparatus according to claim 5, wherein cleaning is performed by spraying a cleaning medium from the cleaning medium spraying means into the weighing hopper.

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