JP2013067458A - Device and method for inputting powder to sealed tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sticking of powder to the inside of a valve, when inputting the powder in a sealed tank.SOLUTION: In the sealed tank 10 having a powder input pipe 12, a powder input valve 14 connected to the powder input pipe 12, a vacuuming pipe 22 and a vacuuming valve 24 connected to the vacuuming pipe 22, this powder input device to the sealed tank includes a powder input cylindrical body 30 inserted inside the powder input pipe 12 by penetrating through the powder input valve 14, a lowering-positioning part 32 arranged on an outer peripheral surface of the powder input cylindrical body 30 and lowering-positioning the powder input cylindrical body 30, a powder input nozzle 34 for making the powder flow by extending above the powder input cylindrical body 30, a vacuuming cylindrical body 40 inserted inside the vacuuming pipe 22 by penetrating through the vacuuming valve 24, and a lowering-positioning part 42 arranged on an outer peripheral surface of the vacuuming cylindrical body 40 and lowering-positioning the vacuuming cylindrical body 40.

Description

  The present invention relates to a powder charging apparatus and a powder charging method for a sealed tank.

  Normally, a valve is installed in the fluid input channel of the sealed tank so that the sealed tank can be sealed after the fluid is introduced. For example, as shown in FIGS. 4A and 4B, a powder-feeding pipe 12 is connected to a sealed tank 10 into which powder is put, and a flange 16 is provided upstream of the powder-feeding pipe 12. The fixed pipe 70 is connected to the upstream side of the valve 14 via the flange 16.

  4B, when powder is introduced into the sealed tank 10, the valve 14 is first opened and then the powder is passed from the fixed pipe 70 through the valve 14. Then, it is put into the closed tank 10 through the powder feeding pipe 12.

  However, when the powder passes through the valve 14, the powder tends to adhere to the inner surface of the valve 14. For example, when the powder is put in a place where a solvent is stored in advance in a sealed tank, the inner surface of the valve is wetted by the vapor of the solvent and the powder adheres. In addition, even when there is no solvent in the closed tank, it may be solidified and adhered by powder moisture or the like. When the valve 14 is repeatedly opened and closed with the powder adhering to the inner surface of the bubble 14, the sealing surface of the valve 14 is scraped, and leakage from the sealed tank 10 occurs via the valve 14. There is a risk that.

  In order to prevent the powder from adhering to the inner surface of the valve, Patent Document 1 discloses that a powder or the like is carried between an annular valve seat that is movable in the flow path direction and the inner surface of the flow path. In order to prevent objects from sticking, a ball valve seal structure that strongly seals between an annular valve seat and a valve pair has been proposed.

Registered Utility Model No. 3050961

  However, in the ball valve described in Patent Document 1, the adhesion of the powder to the inner surface of the valve due to the vapor of the solvent when the powder is put in a place where the solvent is previously stored in the sealed tank is sufficiently suppressed. It ’s difficult.

  The present invention has been made in view of the above situation, and when powder is put into a sealed tank, the adhesion of the powder to the inside of the valve is prevented and the sealed tank extends the life of the valve. An object of the present invention is to provide a powder charging device and a powder charging method.

  As a result of intensive studies to solve the above problems, the present inventors have completed the present invention shown below. The present invention has the following features.

  (1) Powder input for supplying powder to a sealed tank having a powder input pipe for supplying powder into the tank and a powder input valve connected to the powder input pipe In the apparatus, it is freely movable between a retracted position retracted to the outside of the powder charging valve and an insertion position inserted into the powder charging pipe through the opened powder charging valve. A powder-feeding cylinder, and a powder-feeding nozzle having an open end disposed inside the powder-feeding cylinder and allowing the powder to flow out. Powder is introduced by allowing powder to flow out of the powder injection nozzle while the cylindrical body is moved to the insertion position and guiding the powder into the tank by the powder injection cylindrical body Device.

  (2) In the above (1), the outer peripheral surface of the powder charging cylindrical body is provided with a positioning portion for positioning at the insertion position when the powder charging cylindrical body is inserted. It is a powder injection apparatus of description.

  (3) A vacuuming pipe for performing vacuuming, and a vacuuming valve connected to the vacuuming pipe, and when the powder is charged, the vacuuming pipe and the vacuuming valve The powder input device according to (1) or (2), wherein vacuuming is performed via

  (4) A vacuum movable between a retracted position retracted to the outside of the vacuuming valve and an insertion position inserted into the vacuuming pipe through the opened vacuuming valve. The powder feeding apparatus according to (3), further including a pulling cylindrical body, wherein vacuuming is performed in a state where the vacuum pulling cylindrical body is moved to the insertion position.

  (5) a powder tray provided movably between a first position disposed on the vacuuming valve and a second position retracted from the vacuuming valve; and The movement is controlled, the powder tray is moved from the first position to the second position at the time of powder charging, and the powder charging cylindrical body is moved to the retracted position after the powder is charged. A powder feeding apparatus according to any one of (1) to (4), further comprising a control unit that moves the tray to the first position.

  (6) A powder input pipe for supplying powder into the tank, a powder input valve connected to the powder input pipe, a vacuum supply pipe for evacuation, In a powder charging method for charging powder into a closed tank having a vacuuming valve connected to a vacuuming pipe, a step of opening the vacuuming valve and a vacuuming cylindrical body for the vacuuming A step of passing through a valve and disposing in the evacuation pipe, a step of evacuating the tank through the evacuation tubular body, a step of opening the powder input valve, a powder A step of inserting a body injection cylindrical body into the powder injection valve and disposing it in the powder insertion pipe; and an opening end of a powder injection nozzle disposed in the powder injection cylinder. Flowing the powder in a state and introducing it into the tank; A powder inputting method characterized by having.

  (7) Furthermore, after the powder has been charged, a step of retracting the powder charging cylindrical body to the outside of the powder charging valve, a step of closing the powder charging valve, and a powder tray A step of moving onto the powder charging valve; a step of stopping evacuation; a step of retracting the evacuation tubular body to the outside of the vacuum evacuation valve; and a step of closing the vacuum evacuation valve. The powder charging method according to (6) above.

  According to the powder injection device for supplying powder to the sealed tank in the present invention, the powder flowing in from the powder injection nozzle is inserted after the powder injection cylindrical body is inserted into the powder injection valve. Since it is guided into the sealed tank via the powder injection pipe through the powder injection cylinder, the powder does not contact the inner surface of the powder injection valve, and the inner surface of the powder injection valve It is possible to prevent the powder from adhering to the powder and extend the life of the powder injection valve.

  In addition, according to the powder feeding apparatus for feeding powder into the sealed tank according to the present invention, since the positioning portion is provided on the outer peripheral surface of the powder feeding cylindrical body, The state body is inserted into the powder injection valve and disposed at a predetermined position in the powder injection pipe. Thereby, powder adhesion to the inner surface of the powder charging valve is reliably suppressed.

  In addition, according to the powder injection device for supplying powder to the sealed tank according to the present invention, since the vacuuming pipe and the vacuuming valve are provided, the powder guide into the sealed tank is promoted.

  In addition, according to the powder charging device for charging powder into the sealed tank in the present invention, when the powder is guided into the sealed tank, the vacuuming tubular body is inserted into the vacuuming valve. Even if a part of the powder charged in the closed tank rises, the powder does not contact the inner surface of the vacuuming valve. This prevents the powder from adhering to the inner surface of the evacuation valve and extends the life of the evacuation valve.

  In addition, according to the powder injection device for supplying powder to the closed tank according to the present invention, after the powder is injected, the powder input cylindrical body is retracted from the powder input valve, and then the powder input device is used. Since the powder tray is moved to the first position on the valve, the powder remaining on the powder charging cylindrical body does not fall on the powder charging valve. Thereby, the powder adhesion to the powder charging valve is greatly suppressed.

  According to the method for charging powder into the sealed tank according to the present invention, the closed tank is provided with a powder feeding pipe, a powder feeding valve connected to the powder feeding pipe, and a vacuuming pipe. When the vacuuming valve connected to the vacuuming pipe is provided, the powdery cylindrical body is inserted after the powdering cylindrical body is inserted into the powdering valve. Therefore, the powder does not contact the inner surface of the powder injection valve. This prevents the powder from adhering to the inner surface of the powder charging valve and extends the life of the powder charging valve. In addition, since the powder is guided into the sealed tank after the vacuuming cylinder is inserted into the vacuuming valve, the vacuuming valve can be used even if a part of the powder rises from the inside of the sealed tank. The powder does not come into contact with the inner surface. This prevents the powder from adhering to the inner surface of the evacuation valve and extends the life of the evacuation valve.

  Further, according to the method for charging powder into the sealed tank according to the present invention, the powder receiving cylinder is retracted from the powder charging valve after the powder is charged, and then the powder receiving tray is moved to the powder charging valve. Since the powder is moved to the upper first position, the powder remaining in the powder charging cylindrical body does not fall on the powder charging valve. Thereby, the powder adhesion to the powder charging valve is greatly suppressed.

It is a schematic block diagram which shows an example of the structure of the powder injection | throwing-in apparatus which inputs powder into the closed type tank which concerns on this embodiment, and shows the state before powder injection and after powder injection. It is a schematic block diagram which shows an example of the structure of the powder injection apparatus which inputs powder into the closed type tank which concerns on this embodiment, and shows the state at the time of powder injection and during powder injection. It is a figure explaining the other example of a structure of the powder injection | throwing-in apparatus to the sealed tank which concerns on this embodiment. It is a flowchart explaining an example of the powder injection method to the sealed tank which concerns on this embodiment. It is a schematic block diagram which shows an example of the structure of the powder injection | throwing-in apparatus which introduce | transduces powder into the conventional closed type tank, and shows the state before powder injection and after powder injection. It is a schematic block diagram which shows an example of the structure of the powder injection | throwing-in apparatus which throws powder into the conventional sealed tank, and shows the state at the time of powder injection | pouring and during powder injection | pouring.

  FIG. 1A and FIG. 1B illustrate an example of the configuration of a powder charging device for a sealed tank according to this embodiment. As shown in FIGS. 1A and 1B, a sealed tank 10 according to the present embodiment includes a powder charging pipe 12 and a powder charging valve 14 connected to the powder charging pipe 12 via a flange 16. And a vacuuming pipe 22 and a vacuuming valve 24 connected to the vacuuming pipe 22 via a flange 26. The powder injection apparatus according to the present embodiment includes a powder injection cylindrical body 30 that can be inserted into the powder injection pipe 12 through the powder injection valve 14, and a powder injection cylinder. A lowering positioning portion 32 of the powder-feeding cylindrical body 30 provided on the outer peripheral surface of the powder-like body 30 for positioning the powder-feeding cylindrical body 30 when the powder-feeding cylindrical body 30 is inserted; An opening end is disposed inside the charging cylinder 30 and has a powder charging nozzle 34 through which powder flows out. Further, the vacuuming valve 24 is inserted into the vacuuming pipe 22. Possible vacuuming cylinder 40 and vacuuming cylinder provided on the outer peripheral surface of vacuuming cylinder 40 and for lowering positioning of vacuuming cylinder 40 when vacuuming cylinder 40 is inserted And a lowering positioning part 42 for the body.

  FIG. 2 illustrates another example of the configuration of the powder input device for the sealed tank according to the present embodiment. The powder feeding apparatus for the sealed tank shown in FIG. 2 includes, in addition to the powder feeding apparatus for the sealed tank shown in FIG. 1, a powder tray 50 provided on the rotating shaft 52, and a rotating shaft 52. The driving device 54 to be rotated and the driving device 54 are controlled so that the powder receiving tray 50 is retracted from the first position (position indicated by the solid line in FIG. 2) on the powder charging valve 14 when powder is charged. The powder receiving tray 50 is moved to a position (a position indicated by a dotted line in FIG. 2), and after the powder is charged, the powder-feeding cylindrical body 30 is pulled up above the powder-feeding valve 14 (retracted position). And a control unit 60 that moves to a first position on the charging valve 14.

  In the present embodiment, the lowering positioning portion 32 of the powder-feeding cylindrical body is preferably provided on the outer peripheral surface above the powder-feeding cylindrical body 30, and the evacuating cylindrical body The lower positioning portion 42 is preferably provided on the outer peripheral surface above the evacuating tubular body 40. Further, in the present embodiment, the powder supply cylindrical body 30 includes a retracted position (position shown in FIG. 1A) retracted outside the powder input valve 14 and an opened powder input valve 14. It is provided so as to be movable between an insertion position (position shown in FIG. 1B) inserted and inserted into the powder input pipe 12. Similarly, the evacuation tubular body 40 is inserted into the evacuation pipe 22 through the evacuation position (position shown in FIG. 1A) evacuated to the outside of the evacuation valve 24 and the opened valve 14. It is movably provided between the insertion position (position shown in FIG. 1B) inserted in

  The powder feeding cylindrical body 30 and the vacuuming cylindrical body 40 are reciprocally movable between the aforementioned retracted position and insertion position by an air cylinder (not shown). The moving means for moving the cylindrical bodies 30 and 40 is not limited to the above-described air cylinder, and any other means may be used as long as it can be reciprocated between the retracted position and the inserting position. .

  Furthermore, the powder injection nozzle 34 is fixed at a predetermined position when the powder injection cylindrical body 30 is lowered. Therefore, when the powder charging cylindrical body 30 is lowered, the powder charging nozzle 34 extends as if it extends above the powder charging cylindrical body 30 and is connected to the powder charging cylindrical body 30. In such a state, a certain amount is stretched.

  Further, in the present embodiment, the predetermined amount of repeated vertical movement of the powder-feeding cylindrical body 30 and the vacuuming cylindrical body 40 is controlled by a control device (not shown).

  In addition, since the cylindrical body is inserted in each of the powder charging valve 14 and the vacuuming valve 24 in the present embodiment, a ball valve or a gate valve having a wider flow path is used. In the present embodiment, the powder charging valve 14 and the vacuuming valve 24 will be described by taking ball valves as an example.

  Next, operation | movement of the powder injection apparatus to the sealed tank which concerns on this embodiment is demonstrated below using FIG. 1A-FIG. In the following description of the operation of the powder feeding apparatus, a case where the powder tray 50 is provided will be described as an example. Note that the operation when the powder tray 50 is not provided is only a difference in that there is no operation for moving the powder tray 50, and detailed description thereof is omitted.

  As shown in FIG. 1A, when the sealed tank is hermetically sealed, the powder charging device 14 and the vacuum pulling valve 24 are closed when the sealed tank is sealed. The powder input cylindrical body 30, the powder input nozzle 34, and the evacuation cylindrical body 40 are positioned above (retracted position). On the other hand, when the powder is charged, first, the vacuuming valve 24 is opened (S100), and the vacuuming tubular body 40 is evacuated by inserting the vacuuming valve 24 as shown in FIG. 1B. The vacuum pulling tubular body 40 is lowered by being inserted into the pulling pipe 22 and abutting the lowering positioning portion 42 provided on the outer peripheral surface of the vacuum pulling tubular body 40 with the flange 26. (S102). At this time, the opening end of the evacuation tubular body 40 may be disposed in the evacuation pipe 22 or may be disposed so as to protrude into the sealed tank 10.

  After the evacuation tubular body 40 is inserted into the evacuation pipe, evacuation is started (S104). Thereafter, the powder tray 50 is retracted from the first position (the position indicated by the solid line in FIG. 2) to the second position (the position indicated by the dotted line in FIG. 2) (S106). At this time, the retraction angle may be any angle as long as the powder receiving tray 50 is retracted from the position where the powder charging cylindrical body 30 is inserted into the first valve 14, but for convenience, 90 ° to 180 °. It is preferable to evacuate. Thereafter, the powder injection valve 14 is opened (S108).

In addition, the powder injection cylindrical body 30 is inserted into the powder injection pipe 12 through the powder injection valve 14, and the lower positioning is provided on the outer peripheral surface of the powder injection cylindrical body 30. By bringing the portion 32 into contact with the flange 16, the powder injection cylindrical body 30 is positioned downward (S110). At this time, the open end of the powder injection cylindrical body 34 may be arranged in the powder injection pipe 12 or may be arranged so as to protrude into the sealed tank 10.

  On the other hand, when the powder injection cylindrical body 30 is lowered, the powder injection nozzle 34 apparently extends above the powder injection cylindrical body 30 and the powder injection cylindrical body 30. It will be in the state extended | stretched a fixed amount in the state connected with. It should be noted that the powder injection nozzle 34 has at least an open end inside the powder injection cylindrical body 30 even when the powder injection cylindrical body 30 moves to the insertion position (position shown in FIG. 1B). The placement position is set.

  Next, the powder is caused to flow out from the powder injection nozzle 34, and the powder is introduced into the sealed tank 10 by the powder injection cylindrical body 30 (S112). After the completion of the powder charging, the powder charging cylindrical body 30 is lifted and moved to the retracted position (S114). Next, the powder charging valve 14 is closed (S116). Thereafter, the control unit 60 rotates the rotary shaft 52 by a predetermined amount using the driving device 54 to move the powder tray 50 onto the powder feeding valve 14 (first position) (S118). After moving the powder tray 50, evacuation is stopped (S120), and the evacuating tubular body 40 is pulled up (S122). Thereafter, the vacuuming valve 24 is closed (S124). Thereby, the powder charging process is completed.

  As described above, since the powder is guided into the sealed tank 10 by the powder injection cylindrical body 30, the powder does not contact the inside of the powder injection valve 14, and the powder injection valve Since the powder is prevented from adhering inside 14, the life of the powder charging valve 14 can be extended. Further, since the evacuation tubular body 40 is disposed in the evacuation pipe 22 through the evacuation valve 24, even if a part of the powder charged in the sealed tank 10 rises, Since the powder does not contact the inside of the vacuuming valve 24, the adhesion of the powder is prevented inside the vacuuming valve 14, and the life of the vacuuming valve 24 can be extended. In addition, if the solvent is stored in the sealed tank 10 in advance, even if the powder is charged, the powder charging valve 14 is previously connected to the powder charging cylindrical body 30. Is inserted, and the evacuation tubular body 40 is inserted into the evacuation valve 24, so that the vapor of the solvent can be in direct contact with both the powder charging valve 14 and the evacuation valve 24. The nature is low. Accordingly, the solvent is prevented from adhering to the sealing surfaces of the powder charging valve 14 and the vacuuming valve 24, and the powder adhesion due to the wetting by the solvent is also prevented.

  In addition, although the case where the powder receiving tray 50 is rotatably provided was described as an example, the present invention is not limited to this, and the upper position (first position) of the powder charging valve 14 and the powder charging valve 14 are retracted. As long as it can move to the retracted position (second position), it may be configured to move forward and backward in the horizontal direction, for example.

  DESCRIPTION OF SYMBOLS 10 Sealed tank, 12 Powder injection piping, 14 Powder injection valve, 16, 26 Flange, 24 Vacuum evacuation valve, 30 Powder injection cylindrical body, 32, 42 Lowering positioning part, 34 Powder injection Nozzle for use, 40 cylinder for vacuuming, 50 powder tray, 52 rotating shaft, 54 drive unit, 60 control unit, 70 fixed piping.

Claims (7)

In a powder feeding apparatus for feeding powder into a closed tank having a powder feeding pipe for feeding powder into the tank and a powder feeding valve connected to the powder feeding pipe,
Powder movable between a retracted position retracted to the outside of the powder input valve and an insertion position inserted through the powder input valve in the open state and inserted into the powder input pipe A cylinder for injection;
A powder injection nozzle that has an open end disposed inside the powder injection cylindrical body and allows powder to flow out; and
Powder is flowed out from the powder injection nozzle in a state where the powder injection cylindrical body is moved to the insertion position at the time of powder addition, and the powder is injected by the powder injection cylindrical body. A powder charging device for guiding into the tank.   The positioning portion for positioning at the insertion position at the time of insertion of the powder injection cylindrical body is provided on the outer peripheral surface of the powder injection cylindrical body. The powder input apparatus described.   A vacuum drawing pipe for performing vacuum drawing and a vacuum drawing valve connected to the vacuum drawing pipe are further provided, and when the powder is charged, the vacuum drawing pipe and the vacuum drawing valve are used. 3. The powder input device according to claim 1, wherein vacuuming is performed. A vacuuming cylinder movable between a retracted position retracted to the outside of the vacuuming valve and an insertion position inserted through the vacuuming valve in an open state and inserted into the vacuuming pipe. Further comprising:
4. The powder feeding apparatus according to claim 3, wherein the vacuuming is performed in a state where the cylindrical body for vacuuming is moved to the insertion position. A powder tray provided movably between a first position disposed on the vacuuming valve and a second position retracted from the vacuuming valve;
The movement of the powder tray is controlled, the powder tray is moved from the first position to the second position at the time of powder feeding, and the powder feeding cylindrical body is moved to the retracted position after the powder is loaded. A control unit for moving the powder tray to the first position after
The powder injection device according to any one of claims 1 to 4, further comprising: A powder input pipe for supplying powder into the tank, a powder input valve connected to the powder input pipe, a vacuum supply pipe for evacuation, and the vacuum supply In a powder charging method for charging powder into a sealed tank having a vacuuming valve connected to a pipe,
Opening the vacuum valve;
Inserting a vacuuming tubular body into the vacuuming pipe by passing the vacuuming tubular body through the vacuuming valve;
Evacuating the tank through the evacuating cylinder, and
Opening the powder charging valve;
A step of inserting a powder injection cylindrical body into the powder insertion valve by inserting the powder injection cylinder;
A step of allowing powder to flow out and introducing into the tank with the opening end of the powder injection nozzle disposed in the cylindrical body for powder injection; and
A powder charging method characterized by comprising: And a step of retracting the powder input cylindrical body to the outside of the powder input valve after the completion of powder input;
Closing the powder charging valve;
Moving the powder tray onto the powder charging valve; and
Stopping the evacuation; and
Retracting the evacuating tubular body to the outside of the evacuating valve; and
Closing the vacuuming valve;
The powder charging method according to claim 6, further comprising:

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