JPS6139084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waste liquid filter device, and more particularly to a waste liquid filter device in which filter elements can be replaced by remote control.

Nuclear power plants and nuclear power experiment facilities may discharge waste liquid containing radioactive substances, and a waste liquid filter device is required to filter the radioactive waste liquid. Although FIG. 1 shows a conventional waste liquid filter device, it is virtually impossible to use this device for filtering radioactive waste liquid. In other words, in order to filter radioactive waste liquid, the waste liquid filter device must be placed in a compartment called a hot cell to prevent radioactivity leakage, but in the case of conventional waste liquid filter devices, the filter elements must be replaced periodically. This is because, since the work must be done manually by the workers, there is a risk that the workers may be exposed to radiation inside the hot cell, which could pose a danger to their lives. To explain how to replace the filter element in this conventional waste liquid filter device using FIG. 1, an operator first removes the bolts 29 with a spanner or the like, and removes the storage pipe flange 26 having the storage pipe flange handle 27. Next, remove the bolts 31 that fix the filter element 2 in the housing tube 1, and remove the filter element holding plate 30.
The filter element 2 is taken out from the storage tube 1 by holding the handle 32 provided therein, and replaced with a new filter element. In this way, it is necessary to perform the replacement operation directly by hand, and in addition, it is difficult to reduce the air dose rate inside the hot cell to a level where workers can enter, and furthermore, the solid content collected by the filter is difficult to reduce. Due to the high radioactivity of radioactive waste, it is impossible to use conventional waste liquid filter devices for radioactive waste liquid.

An object of the present invention is to provide a waste liquid filter device that is safe and easy to operate without exposing workers to radiation.

In short, the present invention relates to the structure of a waste liquid filter device configured to allow filter elements to be replaced by a remote control device such as a power manipulator (magic hand) or a crane provided within a hot cell.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, a waste liquid inlet nozzle 3 is provided at the upper part of the filter element storage pipe 1, and a waste liquid outlet nozzle 4 is provided at the lower end. Reference numeral 2 designates a filter element disposed within the storage tube 1, which is suspended within the storage tube 1 by locking a flange 5 provided at its upper end to a ring 6 provided within the storage tube. A gasket 17 seals the flange 5 and the ring 6. A cylindrical lifting fitting 7 having a waste liquid inlet 7a is provided at the upper part of the flange 5. Reference numeral 10 denotes a flange provided at the upper end of the storage tube 1, and a disk 8 is placed above the flange 10 via a gasket 9 so as to cover the storage tube. This disk 8 is a movable metal fitting 1
6 is pressed by a disk tightening device 12 screwed into the disk. 12a is a handle for operating the tightening device, and 12b is a tightening metal fitting. The movable fitting 16 is rotatably connected at one end to a support 16a fixed to the storage tube 1 by a hinge 18, and is fixed at the other end by a lock pin 13, and supports the disk tightening device 12 when the device is in operation. It plays a role as a body. 14 is a lever for rotating the movable metal fitting 16.

In this device, the radioactive waste liquid flows into the storage pipe 2 from the waste liquid inlet nozzle 3, enters the inside of the filter element 2 having a cylindrical shape, etc., the particles contained therein are removed, and the filtrate gushes out outside the filter element. Finally, the waste liquid is discharged to the outside of the apparatus through the waste liquid outlet nozzle 4.

Next, a method for removing the filter element 2 in this device will be explained using FIGS. 3 to 6.
However, all of these operations are performed using a remote control device such as a power manipulator or crane provided within the hot cell. In Figure 3,
First, the handle 12a is turned by the manipulator to release the pressed state of the disk 8, and then the lock pin 13 is pulled out in the direction of the arrow. followed by the fourth
As shown in the figure, push the lever 14 in the direction of the arrow with the power manipulator and flip up the movable metal fitting 16 around the hinge 18 with the disk tightening device attached. Next, as shown in FIG. 5, the disk 8 is lifted up and removed by a magnetic crane 19 provided inside the hot cell. FIG. 6 shows the filter element being lifted up. After removing the disk 8, the magnet part of the magnetic crane 19 is again attached to the upper end surface of the lifting fitting 7, and the filter element 2 is pulled out from the storage tube 1, and a new filter element is installed. exchange with.

FIG. 7 shows another embodiment, in which a support 16b is further fixed upright to the support 16a, and a disk opening/closing lever 15 is supported by a hinge 20. Thereby, when extracting the filter element 2, there is no need to remove the disk 8 using the magnetic crane 19, and the disk 8 can be opened by operating the lever 15.

Although this invention has been described above as a filter for waste liquid treatment, the same structure can also be adopted as a gas filter, and the filter can also be replaced by remote control when placed in a hot cell or when toxic gas is present. It can be used in any case where it is necessary. Of course, when used in a place where remote control is not required, direct manual operation is possible.

According to the present invention, even in a case where direct manual operation is not possible, such as in a hot cell, the filter element can be easily and safely replaced using a remote control device.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a conventional waste liquid filter device, FIG. 2 is a partially cutaway side view of a waste liquid filter device according to the present invention, and FIGS. 3 to 6 show a method of operating the device shown in FIG. 3 to 5 are side partial views of the movable metal part, FIG. 6 is a side sectional partial view, and FIG. 7 is a side partial view of a waste liquid device showing another embodiment. 1...Storage pipe, 2...Filter element, 5...
Filter element flange, 6... ring, 7...
Hanging fitting, 8...Disk, 10...Flange, 12...Disc tightening device, 13...Lock pin, 14, 15...Lever, 16...Movable metal fitting, 16a, 16b...Support, 18, 20...
Hinge.

Claims (1)

[Scope of Claims] 1. A storage pipe, a filter element having a hanging fitting at the upper end and detachably suspended inside the storage pipe, and a movable filter element attached to the storage pipe so as to be openable and closable. It consists of a metal fitting, a locking member for fixing the movable metal fitting, a disk tightening device screwed onto the movable fitting, and a disk placed between the disk tightening device and the upper end of the storage tube, and allows filter element replacement with a manipierator. A waste liquid filter device characterized by: 2. The waste liquid filter device according to claim 1, wherein a ring is provided inside the storage pipe, and a flange provided on the upper part of the filter element is engaged with the ring to suspend the filter element. 3. The waste liquid filter device according to claim 1 or 2, characterized in that the movable metal fitting is provided with a lever for opening and closing the movable metal fitting. 4. The waste liquid filter device according to claim 3, characterized in that the disk is provided with a lever for opening and closing the disk.