JPS5814494B2 - exhaustion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for collecting foreign matter mixed into a liquid.

When a liquid is used as a coolant or the like, the liquid reacts with the members forming the flow path to generate foreign matter.

This tendency is particularly noticeable when the liquid has strong chemical activity.

There is always a possibility that foreign matter may be present in the liquid, either due to wear debris coming out of equipment installed in the flow path or foreign matter accidentally getting mixed in.

Since foreign matter in the liquid deteriorates the properties of the liquid and has various adverse effects on related equipment, a foreign matter collection member is usually installed in a part of the liquid flow path, and the foreign matter is removed by the collection member. is collected and the liquid is purified.

However, if the collecting member collects more than a certain amount of foreign matter, it loses its function and blocks the liquid flow path, so it is necessary to replace the collecting member with a new one or clean it.

In order to replace the collection member, it is necessary to stop the operation of the related equipment, and the liquid is highly chemically active,
If there is a risk of rapid reaction with air or if the vapor of the liquid is toxic, special measures are required to replace the collection member.

For example, liquid metals such as liquid sodium are used as coolants in high performance nuclear reactors such as fast breeder reactors.

As is well known, the liquid metal has strong chemical activity and may also contain radioactive substances.

Therefore, in particular, the replacement work of the foreign matter collection member installed in the liquid metal flow path must be performed in a state isolated from the outside air and by remote control without direct human touch.

Further, since it takes a long time to restart the operation of the nuclear reactor, it is desirable for the efficiency of operation of the reactor to perform the replacement work while the reactor is still operating.

The present invention has been made in order to provide a foreign matter collection device that makes it possible to replace the foreign matter collection member as described above. a first cylindrical member extending in the vertical direction and incorporating a foreign matter collection member; a second cylindrical member disposed in parallel with the first cylindrical member and capable of receiving the foreign matter collection member; A substantially horizontal support member that supports the second cylindrical member at its upper open end, a lid member that is rotatably provided above the support member and faces the support member, and a lid member that extends approximately vertically upward. a third cylindrical member integrally formed with the third cylindrical member and having a lower opening selectively opposed to the upper openings of the first and second cylindrical members; a lifting device that removably holds and lifts up the foreign matter collecting member; a blind stopper provided in the recessed portion of the lower surface of the lid member that selectively closes the upper openings of the first and second cylindrical members; It has an annular sealing member that surrounds the opening and is sandwiched between the lid member and the support member, and the lower part of the second cylindrical member is constituted by another separable cylindrical container. According to the present invention, the collecting member is removed from the first cylindrical member into the third member.
The work of lifting the collection member into the second cylindrical member, rotating the lid member, and lowering the collection member into the second cylindrical member, and the completely opposite work, that is, the work of transferring the collection member, are carried out by the sealing member. This is carried out in isolation from the outside air, and since the first cylindrical member is closed with a blind stopper during the removal of the collection member placed in the second cylindrical member, the transfer of the collection member is difficult. This has the effect that exchange can be carried out safely and reliably while the circulating liquid is isolated from the outside air and while the plant is in operation.

Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, a first cylindrical member 1 has an introduction hole 2 for liquid, ie, liquid sodium, at its lower part, and an outlet hole 3 at its upper part.

The hollow lower part of the first cylindrical member 1 has a stepped portion 4, and a cylindrical collection member 5 is supported on the stepped portion 4.
The upper end ends below the outlet hole 3.

On the outer circumference of the upper end surface of the collection member 5, four hangers 6 are arranged at equal circumferential intervals.

The collection member 5 is made of a framework and gold-copper filled in the same framework.

The first cylindrical member 1 has an overflow hole 7 above the outlet hole 3 for keeping the liquid level of the liquid sodium at a constant height;
Furthermore, it has an inert gas outlet hole 8 above it and an upper opening end 9 through which the collection member 5 can be inserted and removed.

Furthermore, a cooling jacket 10 through which cooling gas flows is provided on the outer periphery of the portion of the first cylindrical member 1 that houses the collection member 5.

The cooling jacket 10 and the first cylindrical member 1 are covered with a heat insulating material (not shown).

Next, the second cylindrical member 11 is provided in line with the first cylindrical member 1 and has a hollow portion 12 through which the collection member 5 can pass.

Furthermore, the second cylindrical member 11 has an upper opening end 13 on the same plane as the upper opening end 9 of the first cylindrical member 1, and an inert gas introduction hole 14 located slightly below the upper opening end 13.
has.

The first cylindrical member 1 has an upper open end 9 and the second cylindrical member 1
1 and the upper open end 13 are integrally supported by an annular support member 15, respectively.

An annular plane bearing 16 is provided on the outer periphery of the annular support member 15.
A coplanar bearing 16 rotatably supports a disc-shaped lid member 17.

The lid member 17 is connected to the axis of the first cylindrical member 1 and the second cylindrical member 1.
A third cylindrical member 19 has a rotation 1 drive device 18 at a position corresponding to the midpoint of the straight line connecting the axis of the cylindrical member 11 and extends upward coaxially with the first cylindrical member 1. is formed.

The third cylindrical member 19 has a lower opening end corresponding to the upper opening end 9 of the first cylindrical member 1 and the upper opening end 13 of the second cylindrical member 11, and is in the illustrated state. In this case, it communicates with the first cylindrical member, but when the lid member 17 is rotated 180 degrees, it communicates with the second cylindrical member 11.

The third cylindrical member 19 has an inert gas introduction hole 20 at its upper end and a lifting device 21 built therein.

The lifting device 21 includes a hoisting device 22 installed on the ceiling of the third cylindrical member 19, a rope 24 extending downward from the hoisting device 22, and having its lower end connected to a heat shielding member 23, and a rope 24 connected to the heat shielding member 23 at its lower end. The heat shielding member 23 has four arms 25 fixed at the upper end and selectively coupled to the hanging tool 6 of the collection member 5 at the lower end.
6 is drilled through.

Regarding the drive device 18 of the lid member 17, a cylindrical space 27 opening downward is provided at a symmetrical position of the third cylindrical member 19, that is, a position corresponding to the second cylindrical member 11. The open end 9 of the first cylindrical member 1 is located in the space 27.
and the open end 13 of the second cylindrical member 11 are provided with a blind plug 28 that fits together, and the blind plug 28 is connected to a double-acting hydraulic cylinder 29 provided on the upper part of the lid member 17.

The annular support member 15 has a horizontal surface 30 on its upper surface, whereas the lid member 17 has a horizontal surface 31 facing away from the horizontal surface 30. Between the horizontal surface 31 and the horizontal surface 30, there is a drive device. A small-diameter annular sealing member 33 surrounding the axis of 18, and a large-diameter annular sealing member 32 surrounding this sealing member 33 and located approximately concentrically therewith.
It is arranged so as to surround the upper open ends 9 and 13 of the cylindrical member.

The lower opening end of the second cylindrical member 11 is integrated with the lower opening end of the fourth cylindrical member 34 provided in parallel with the disc-shaped connecting member 35, and opens on the same surface. tied together.

Below the second cylindrical member 11 is a fifth cylindrical member 36 coaxially communicating therewith, and below the fourth cylindrical member 34 is a sixth cylindrical member coaxially communicating therewith. The fifth and sixth cylindrical members 36 and 37 are respectively disposed.
are integrally supported by a disk-shaped support member 39 supported by an annular bearing member 38 at its upper open end.

Further, the fifth and sixth cylindrical members 36 and 37 each have a container 40 for the collection member 5 in their hollow portions, and also have a support member 3.
9 has a rotation drive device, and the fifth and sixth cylindrical members 36.
37 are rotatable so as to alternate positions with each other.

Although not shown, a sealing member corresponding to the circumferential sealing member 32, 33 is provided between the disc-shaped support member 39 and the connecting member 35.

A gap 41 is provided in the upper part of the fourth cylindrical member 34, and the cap 41 has an inert gas outlet hole 42 in the ceiling. , has a hoisting device 44 with a plug 43 that fits into the container 40.

Further, the cap 41 is connected to a crane via a lifting wire (not shown).

Since the present embodiment has the above-described configuration, the liquid sodium in FIG.
Foreign matter in the liquid sodium is captured by the gold steel of the capturing member 5.

In addition, since liquid sodium is distributed at a high temperature, impurities may be in a molten state, but by circulating a low-temperature gas inside the cooling jacket 10, the liquid sodium can be heated to a level slightly higher than its melting point. It is cooled and impurities are crystallized on the wire mesh of the collection member 5.

The liquid sodium overflows from the overflow hole 7, so that the liquid level is maintained at a constant level.

Further, the inert gas flows into the third cylindrical member 19 through the introduction hole 20, passes through the circulation hole 26, flows out from the outlet hole 8, and enters the third cylindrical member 19.
The interior of the cylindrical member 19 and the portion above the liquid sodium level in the first cylindrical member 1 are always filled.

Further, the inert gas introduced into the second cylindrical member 11 through the introduction hole 14 flows into the second, fourth, fifth, sixth cylindrical members 11,
34, 36, and 37, and flows out from the outlet hole 42.

In a normal state, the blind plug 28 fits into the second cylindrical member 11 and closes the open end 13, but this is due to the introduction hole 20 described above.
This prevents more inert gas from flowing into the second cylindrical member 11.

When it is time to replace the collection member 5 with a new collection member 5', the first step is to operate the hoisting device 44 to lower the plug 43 and remove the container 4 in the sixth cylindrical member 37.
The plug 43 is fitted into the upper opening of the plug 43, and the two are coupled via an interlocking member (not shown) built into the plug 43.

The cap 41 is moved to the plug 43 by a crane (not shown).
The plug 43 and the container 40 are lifted up in a hanging state and transferred to a collecting member storage area (not shown), where the plug 43 and the container 40 are
A new collection member 5' is inserted into the container 40, and the plug 43 is fitted and connected to the container 40 again.

Next, as shown in FIG. 2, the container 40 containing the new collection member 5' is suspended from the camp 41 and passed through the fourth cylindrical member 34. It is loaded into the cylindrical member 37.

The state in which this first operation is completed is shown in the right part of FIG.

In the second stage of operation, as shown in FIG. It is pulled up from inside, and then the rope 24 is wound up by the hoisting device 22 and pulled into the third cylindrical member 19, and stopped and held at a predetermined position.

At the same time, the blind plug 28 is drawn into the cylindrical space 27 by the hydraulic cylinder 29.

As mentioned above, the second stage operation may be performed after the first stage operation, but since these operations are performed at separate locations, they may be performed in parallel.

Thereafter, as a third stage operation, the lid-like member 17 is rotated 180 degrees by the drive device 18.

Through this rotation operation, the third cylindrical member 19 and the blind plug 28 are
The positional relationship shown in FIG. 1 is replaced with each other, and as shown in FIG.
Consistently communicate with.

Next, the blind plug 28 is pushed out by the hydraulic cylinder 29 and fitted into the first cylindrical member 1 to close the upper open end 9.

Then, as a fourth stage operation, the hoisting device of the hoisting device 21 is started and the rope 24 is let out.

As a result, the collection member 5 descends together with the heat shielding member 23 and the arm 25, passes through the hollow part 12 of the second cylindrical member 11, and reaches the container 40 in the fifth cylindrical member 36. .

After or in parallel with this operation, the hoisting device 44 is operated to separate the plug 43 from the container 40 and pull it up into the fourth cylindrical member 34.

Furthermore, as a fifth step operation, the control system (not shown) releases the connection between the hanging tool 6 of the collection member 5 and the arm 25 of the lifting device 21, leaving the collection member 5 in the fifth cylindrical member. Pull up the lifting device 21 into the third cylindrical member 19 (fifth
(see diagram).

Next, as a sixth step operation, when the support member 39 is rotated by half a rotation around its vertical central axis, the fifth and sixth cylindrical members 3
6. The position of 37 shown in FIG. 5 is changed.

Therefore, the old collection member 5 to be replaced is the fourth cylindrical member 3.
4 and the new collection member 5' is located under the second cylindrical member 11.

Note that the second cylindrical member 11 and the fourth cylindrical member 34 are in a fixed relationship and their positions do not change.

The collection member 5' before use is subjected to the second to fifth stages described above.
The first tubular member 1 is loaded into position in liquid sodium by performing the steps in exactly the reverse order.

To explain this simply, in a state where the positions of the collecting members 5 and 5' in FIG. The member 23 and arm 25 are lowered, and the arm 25 is brought into contact with and connected to the hanging tool 6.

Next, the rope 24 is wound around and the collection member 5' is pulled up into the third cylindrical member 19.

After that, or in parallel with this, the blind stopper 28 is drawn in.

Next, as a reversal of the operation in the third stage, the drive device 18 rotates the lid member 17 by 180°, and the third cylindrical member 19 is positioned above the first cylindrical member 1 (see FIGS. (See Figure 3)
.

As a result, the collecting member 5' is in the position of the collecting member 5 in FIG. and place it inside the first cylindrical member 1.

Then, the lifting tool and the arm 25 are separated, and the lifting device 21 is pulled into the third cylindrical member 19.

Also, since the used collecting member 5 is located at the position of collecting member 5' in FIG. 5, the hoisting device 4 is
4, the plug 43 is lowered to fit and connect with the container 40.

Then, a crane (not shown) lifts the cap 41, the plug 43, the container 40 containing the collection member 5, etc. as one body, and transports it to a collection member storage area (not shown).

According to this embodiment, not only is the circulating liquid sodium always isolated from the outside air by the sealing members 32, 33, the blind stopper 28, and the inert gas, but also the amount of time during which the collecting member 5 is absent in the liquid sodium is Because it is short, liquid sodium can be kept flowing, that is, without stopping the reactor operation.
The collection member 5 can be replaced.

Moreover, since the collection member 5 is taken out while being sealed inside the container 40 and is not exposed to the outside air at all, the sodium compounds, radioactive products, etc. captured by the collection member 5 are not scattered into the outside air. This will not cause any harm to the operator.

Moreover, since the above-mentioned replacement and transfer work of the collection member 5 can be performed by a series of very simple operations, remote control is possible, and the replacement cycle of the collection member 5 can be shortened. By constantly maintaining optimal functionality, the purity of liquid sodium can always be maintained in a perfect state.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIGS. 2 to 5 are illustrations of operating conditions of the embodiment. 1... First cylindrical member, 5... Collection member, 11... Second
cylindrical member, 15... annular support member, 17... lid member,
21... Lifting device, 28... Blind plug, 32, 33... Sealing member.

Claims (1)

[Claims] 1. A first cylindrical member installed in the liquid flow system and extending in the vertical direction and containing a removable foreign matter collecting member; a second cylindrical member, a substantially horizontal support member that supports the first and second cylindrical members at their upper open ends, and a substantially horizontal support member that is rotatably provided on the bottom side of the support member and faces the support member; a lid member; a third cylindrical member extending substantially vertically upward and integrally formed with the lid member; the third cylindrical member having a lower opening that selectively faces the upper openings of the first and second cylindrical members; , a lifting device provided inside the third cylindrical member to removably hold and lift up the foreign matter collecting member; a lifting device provided in the recessed portion of the lower surface of the lid member above the first and second cylindrical members; a blind plug that selectively closes the opening; an annular sealing member surrounding the upper opening and sandwiched between the lid member and the supporting member; and a ring-shaped sealing member that is erected in line with the second cylindrical member and is detachable. a fourth cylindrical member provided with a flexible cap; a disc-shaped connection fitted between the outer periphery of the lower opening of the second cylindrical member and the outer periphery of the lower opening of the fourth cylindrical member and extending in the horizontal direction; a disc-shaped support member rotatably provided opposite to the connecting member from below; upper openings are respectively inserted into the support members and selected as lower openings of the second and fourth cylindrical members; fifth and sixth cylindrical members facing each other, a container for a foreign matter collecting member that is removably placed in the fifth and sixth cylindrical members, and an opening of the container that is provided in the cap. 1. A device for collecting foreign matter in a liquid, comprising a hoisting device equipped with a plug that can be freely fitted into the device.