JPH1059485A - Preserving and transferring tool of powdery material repugnant to contact with the air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely prevent contact with the air in a simple manipulation, by fitting a pressure gauge and a gas conduction pipe through a valve at a space between a powdery material containing part of a container and a valve and supplying the powdery material through a connection tool provided with a gas inlet. SOLUTION: When a powdery material is charged in a container when it is vacant at first, a valve 5 is opened to conduct an inert gas through a gas conduction pipe 9 and purge the air in the container 1 and then the valve 5 is closed and nitrogen gas is charged to make positive the pressure in the container. After the gas charge, a connection tool 2 is connected to the container 1. Nitrogen gas is charged from a gas inlet 12 to purge the air in the connection tool 2. Then, a bag 16 filled with a powdery material is connected to the mouth of the connection tool and the valve 5 is opened to drop the powdery material into the containing part 3 of the container 1. Thereafter, the valve is closed and the connection tool is removed. And further, nitrogen gas is charged from the gas inlet and the positive gauge pressure of the pressure gauge 8 is confirmed. Then, the valve 10 is closed and a cover is put on and the powdery material is preserved in this condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the storage and storage of powders, such as oxide superconducting calcined powder, whose performance deteriorates when exposed to air.
It relates to a carrier.

[0002]

2. Description of the Related Art An oxide superconductor is obtained by sintering an oxide superconducting calcined powder, for example, as described in Japanese Patent Application No. 7-299313 by the same inventors. there oxide superconducting calcined powder absorbs CO ₂ and moisture in the air when exposed to air, the CO ₂ and water affects the superconducting composition. Therefore, even if the calcined powder has a strictly adjusted composition, if it is exposed to the air before sintering, a sintered body having the intended superconductivity cannot be obtained.

Conventionally, the following countermeasures have been generally taken for storing and transporting such powders to be prevented from contacting the atmosphere as much as possible. (1) If it is a small amount, enclose it in an ampoule tube in an inert gas atmosphere. (2) When the amount is large, load it into a metal closed container made of stainless steel or A1. (3) Use a vacuum pack. (4) Special processing of the powder surface.

[0004]

[Problems to be solved by the invention] The above (1) (2) or
In the method (3), there is a problem that the function as a closed container cannot be performed once opened. For this reason, in order to prevent any contact with the atmosphere, it is necessary to handle the product in an environment that is maintained in a special atmosphere. . In the case of the surface treatment of (4), when special surface treatment such as glass coating is performed, much work is required and there is a tendency to change the characteristics of the powder.

Accordingly, an object of the present invention is to completely prevent contact with the atmosphere when handling material powder to be processed in the next step such as oxide superconducting calcined powder (storage, transportation, sorting, etc.). Another object of the present invention is to provide a storage / carrying device which can be used and whose handling is simple.

[0006]

According to the present invention, there is provided a container body having an open / close valve mounted between a powder container and a powder access opening, and a powder container and an open / close valve of the container body. A pressure gauge mounted so as to communicate with the space between the valve body, a gas introduction pipe with a valve interposed so as to communicate with the space between the powder storage part of the container body and the on-off valve, and the container body A connector having a gas inlet for introducing gas into the cylinder, comprising a cylinder having a connection port at one end for connection to the opening;
Provided is a powder storage / transportation tool that does not like contact with the atmosphere.

Further, according to the present invention, a container body provided with an opening / closing valve for controlling the entrance and exit of the powder between the powder container and the powder inlet / outlet opening; A pressure gauge mounted to communicate with the space between the valve, a gas inlet mounted to communicate with the space between the powder container of the container body and the on-off valve; A connecting member having a gas inlet for introducing gas into the cylindrical body, and a switching valve intervening device connected to the other end of the connecting member. A second connector and a powder storage / transportation / dispensing tool comprising a second connector that does not want to be in contact with the atmosphere.

Further, according to the present invention, there is provided a container body having an opening / closing valve mounted between the powder storage section and the powder entrance / exit opening, and a space between the powder storage section and the opening / closing valve of the container body. A pressure gauge mounted so as to communicate with the valve, a gas introduction pipe having a valve interposed to communicate with a space between the powder container of the container body and the on-off valve, and connected to the opening of the container body; A cylindrical body having a connection port at one end and an opening at the other end, a gas introduction port for introducing gas into the cylinder, and an on-off valve between the gas introduction port and the opening at the other end. The present invention provides a connecting device provided with the above, and a powder storing / transporting / dispensing device which does not want to be in contact with the atmosphere.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a storage carrier according to a first embodiment of the present invention, wherein 1 is a container main body, and 2 is a cylindrical connector.

An opening / closing valve 5 is mounted on the container body 1 between the powder container 3 and the powder access opening 4. A cover 6 is appropriately attached to the opening 4. The on-off valve 5 is a butterfly valve, and is switched between a flow path closed position and an open position by operating a knob 7 for rotating the valve rod. When the on-off valve 5 is fixed at the flow path closing position, the inside of the container is closed.

A pressure gauge 8 is mounted so as to communicate with the space between the on-off valve 5 and the powder container 3, and the scale of the pressure gauge 8 always indicates the pressure inside the container (the differential pressure from the atmospheric pressure). ) Is displayed as the gauge pressure. The on-off valve 5 and the powder storage unit 3
A gas introduction pipe 9 is mounted so as to communicate with the space between the valve 10 and the valve 10 which is normally closed.
Is interposed. An inert gas such as nitrogen or argon is introduced into the container via the gas introduction pipe 9. In the case of a powder that only dislikes moisture, dry air can be used instead of the inert gas.

The connector 2 is a cylindrical body having a connection port 11 at one end for connection to the powder access opening 4 of the container body, and is provided with a gas inlet 12 for introducing gas into the cylinder. I have. A valve 13 which is normally closed is also attached to the pipe of the gas inlet 12. The connecting device 2 in the illustrated example includes a flexible pipe portion 14 and a rigid pipe portion 15. The flexible pipe portion 14 is connected to the opening 4 of the container, and the gas inlet 12 is attached to the rigid pipe portion 15. The valves 10 and 13 attached to the gas introduction pipe may be check valves.

FIG. 2 shows a state in which the lid 6 of the main body container 1 of FIG. 1 has been removed, and the connector 2 has been connected to the opening 4 thereof. In this connection state, the powder in another container 16 (for example, a pack made of a resin film) can be loaded into the container while being shielded from the atmosphere. The operation procedure of powder filling from the time when the first container is empty is as follows.

(1) Open the on-off valve 5 and open the gas introduction pipe 9
Then, an inert gas (which will be described below using nitrogen gas) is introduced to expel the air in the container 1, and then the on-off valve 5 is closed and the pressure in the container becomes positive (for example, 0.2 kgw / cm ^2).
Above) is sealed in the container. (2) Connect the connector 2 to the container after or before filling the gas. (3) Introduce nitrogen gas from the gas inlet 12 to expel air in the connector 2. (4) Connect the bag 16 containing the powder to the mouth of the connector 2. (5) Open the on-off valve 5 and drop the powder into the powder storage unit 3 of the container. (6) Close the on-off valve 5 and remove the connector 2. (7) Nitrogen gas is introduced from the gas inlet 9 and it is confirmed that the gauge pressure of the pressure gauge 8 maintains at least 0.2 kgw / cm ² , the valve 10 is closed, and the lid 6 is covered.

The data is stored in this state. At that time, 0.2kg
It is monitored by the pressure gauge 8 whether or not w / cm ² is maintained, and if it is not maintained, nitrogen gas is introduced. In addition, transport in this state as necessary. In order to additionally fill the same powder into the container, connect the connector 2 and then
The operations of (3) to (7) may be performed. In addition, it can also be stored and transported with the connection tool 2 attached.

FIG. 3 shows a storage carrier according to a second embodiment of the present invention in which a second connector 18 having an on-off valve 19 is attached to the other end of the connector 2 shown in FIGS. Figure 1
2 is shown upside down. The on-off valve 19 attached to the second connector 18 uses the same butterfly valve as the on-off valve 5 attached to the container body, but this may be a ball valve.

As shown in FIG. 3, a connector 2 is connected to the container body 1 and a second connector 18 is further connected to the connector 2 so that the powder in the container can be connected to another container of each specification. The contact with the atmosphere can be prevented when sorting. The operation procedure is as follows.

(1) The connector 2 and the connector 18 are connected to the container body 1 loaded with powder and maintained at a positive pressure with nitrogen gas. (2) With the on-off valve 19 open while the on-off valve 5 is closed,
A container 20 of each specification is connected to the open end of the connector 18, nitrogen gas is flown from the gas introduction pipe 12, and the inside of the connectors 2 and 18 is replaced with nitrogen gas so that the container body 1 comes up. Invert the whole. (3) With the other container 20 of each specification connected to the open end of the connector 18, the on-off valve 19 is closed. (4) Open the on-off valve 5 to drop a part of the powder into the connector, and close or leave the on-off valve 5 open.
9 is opened and the required amount of powder is transferred to the container 20. (5) When the transfer is completed, after confirming that no powder remains in the connector, the on-off valves 5 and 19 are closed, and the connectors 2 and 18 are disconnected. (6) With the connector 18 and the container 20 connected,
The powder collected inside is transferred to the next step, or the container 20 is closed by another means and the connection tool 18 is removed. (7) On the other hand, nitrogen gas is sealed in the container body 1 from the gas introduction pipe 9 and the inside of the container is maintained at a predetermined positive pressure while watching the pressure gauge 8.

FIG. 4 shows a third embodiment of the present invention in which a connector 2a having an on-off valve 19 on the container side of the gas inlet 12 is used. That is, although the connecting tool 2a has a gas inlet 12 near one end, the on-off valve 19 is interposed between the gas inlet 12 and the center of the cylinder. Also in this case, contact with the atmosphere can be prevented when the powder in the container is separated into other containers of each specification. The operation procedure is as follows.

(1) The connector 2a is connected to the container body 1 loaded with powder and maintained at a positive pressure with nitrogen gas. (2) With the on-off valve 19 open while the on-off valve 5 is closed,
A container 20 of each specification is connected to the open end of the connector 18 and nitrogen gas is flown from the gas introduction pipe 12 to replace the inside of the connector 2a with nitrogen gas while the container body 1 comes up so as to come up. Invert. (3) With the other container 20 of each specification connected to the open end of the connector 2a, the on-off valve 19 is closed. (4) Open the on-off valve 5 to drop a part of the powder into the connector, and close or leave the on-off valve 5 open.
9 is opened and the required amount of powder is transferred to the container 20. (5) When the transfer is completed, the on-off valve 19 is closed, the container 20 of each specification is closed by another means, and separated from the connector 2a. (6) Invert the container body 1 so as to be downward, and if powder remains in the connection tool 2a, drop the powder into the container body 1 and then close the on-off valve 5; Nitrogen gas is sealed, and the inside of the container is maintained at a predetermined positive pressure while watching the pressure gauge 8.

As described above, according to the present invention, when the powder is filled into the container, when the powder is taken out of the container, and when the powder is partially used, the operation can be performed without contact with the atmosphere. It is possible to prevent the properties and physical properties from being impaired. In addition, during storage and transportation, it can be performed in a state where it does not come into contact with the atmosphere, and its management can be reliably performed by looking at the pressure gauge.

The results of using the powder storage and transport device of the present invention will be described below.

[Example 1] Bi-based oxide superconductor calcined powder (B
i1.85, Pb0.35, Sr1.90, Ca2.05,
Cu (3.05) (water content: 0.05 wt%) (carbon content: 0.02 wt%) was stored in the container body of FIG. 1 for 30 days. At that time, the atmosphere in the container was 100% nitrogen, the internal pressure was 0.2 kgw / cm ² , and the powder filling amount was 2 kg.

After storage for 30 days, the operation shown in FIG.
About 500 g was dispensed into another container. Then, the atmosphere of the container body was again changed to 100% nitrogen and an inner pressure of 0.2 kgw / cm ^2.
And store it for 30 days, then put 500g in another container
The container was once again stored for 30 days with the atmosphere in the container body being 100% nitrogen and an internal pressure of 0.2 kgw / cm ² . The carbon content and the water content of the Bi-based oxide superconducting calcined powder at the time of fractionation and at the last elapsed day were measured. The results are shown in Table 1.

Example 2 Y-based oxide superconducting calcined powder (Y1,
Ba2, Cu3, Oy) (water content 0.1 wt%)
Example 1 except that (carbon content 0.3 wt%) was used.
The same operation as described above was performed. In the same manner as in Example 1, the carbon content and the water content were measured at the time of fractionation and on the last storage day. The results are shown in Table 1.

[Example 3] Remanent magnetization is 120 emu / cm ³
The same operation as in Example 1 was performed except that the metal magnetic powder (iron powder) was used. As in Example 1, the residual magnetization of the magnetic powder was measured at the time of preparative separation and at the last storage date, and the results are shown in Table 2.

[Comparative Example 1] 2 kg of the Bi-based oxide superconductor calcined powder of Example 1 was filled in a closed container with a lid, and after removing the lid, a 500 g fractionation operation was performed in another container in the atmosphere. The same number of times and days as in Example 1 were repeated except that the lid was closed and stored. The results were measured in the same manner as in Example 1. The results of measurement of carbon content and water content are shown in Table 1. Was. In addition,
The humidity of the atmosphere during the preparative operation was about 75%.

Comparative Example 2 The same operation as in Comparative Example 1 was carried out except that the Y-based oxide superconducting calcined powder of Example 2 was used. The results of the measurement are shown in Table 1.

Comparative Example 3 A fractionating operation in the air was performed in the same manner as in Comparative Example 1 except that the magnetic metal powder of Example 3 was used. Table 2 shows the results of measuring the residual magnetization at the time of sorting and the last storage date in the same manner.

[0030]

[Table 1]

[0031]

[Table 2]

As can be seen from Tables 1 and 2, the use of the storage and transport device of the present invention makes it possible to prevent the properties of the oxide superconducting calcined powder and the metal magnetic powder from deteriorating.

[0033]

As described above, the powder storage / transportation tool of the present invention can cut off the contact with the atmosphere during the loading, sorting, and discharging operations, and the stored state cut off from the atmosphere can also be measured by the pressure gauge. Since it can be managed, and can be easily operated and can be freely moved and transported, there is an effect that the performance deterioration of the high-performance powder can be prevented by simple means.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of storing and transporting powder according to the present invention, showing a state where a container main body and a connector are separated.

FIG. 2 is a front view showing a state where the container main body and the connecting tool are connected in the embodiment of FIG. 1;

FIG. 3 is a front view showing another embodiment of the powder storage / transportation device of the present invention, showing a state when the powder in the container is dispensed.

FIG. 4 is a front view showing still another embodiment of the powder storage / transportation tool of the present invention, showing a state in which powder in a container is dispensed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2, 2a Connector 3 Powder accommodating part 4 Opening / closing powder 5 Opening / closing valve 8 Pressure gauge 9 Gas introduction pipe of container 12 Gas inlet of connector 18 Second connector 19 Opening / closing valve

Claims (5)

[Claims] 1. A container body having an on-off valve mounted between a powder storage portion and a powder access port, and mounted so as to communicate with a space between the powder storage portion and the on-off valve of the container body. A pressure gauge, a gas introduction pipe provided with a valve interposed so as to communicate with the space between the powder container of the container body and the on-off valve, and a connection port connected to the opening of the container body. A connector having a gas inlet for introducing gas into the cylinder, and a powder storage / transportation tool which does not want to be in contact with the atmosphere. 2. A container body provided with an on-off valve for controlling the entrance and exit of powder between a powder storage part and a powder entrance and exit.
A pressure gauge mounted so as to communicate with the space between the powder storage portion of the container body and the on-off valve, and was mounted so as to communicate with the space between the powder storage portion of the container body and the on-off valve. A connecting member having a gas inlet and a gas inlet for introducing gas into the cylindrical body, the connecting member having a connecting port connected to the opening of the container body at one end; A second connecting device with an on-off valve connected to the end, and a powder storage / transportation / dispensing device which does not want to be in contact with the atmosphere. 3. A container body having an on-off valve mounted between a powder storage part and a powder access port, and mounted so as to communicate with a space between the powder storage part and the on-off valve of the container body. A pressure gauge, a gas introduction pipe provided with a valve interposed so as to communicate with the space between the powder container of the container body and the on-off valve, and a connection port connected to the opening of the container body. A connector having a gas inlet for introducing gas into the cylinder and an on-off valve between the gas inlet and the opening at the other end. And a powder storage, transport and dispensing tool that does not want to be in contact with the atmosphere. 4. The powder container of the container main body has a gauge pressure of 0.
The powder storage and transport device according to claim 1, wherein the inert gas pressure is maintained at ² kgw / cm ² or more. 5. The powder storage / transportation tool according to claim 1, wherein the oxide superconducting calcined powder is stored in the powder storage section.