JPS645280Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a decontamination machine holding device used when radioactively contaminated equipment is decontaminated underwater.

When decontaminating large radioactively contaminated equipment underwater,
This is done using a water tank installed below the floor and a crane above it. In order to shield water from radiation and prevent splashing, the operations are arranged vertically, making it difficult to position the tip of the decontamination machine. When decontaminating irregularly shaped devices that appear from time to time, it is not possible to use a manipulator for all of them, and manual alignment guidance is required.

The present invention aims to provide a device that is effective in these cases. In other words, when decontaminating radioactively contaminated equipment immersed in a water tank, an electric hoist is installed under the hook of the crane, and the electric decontamination machine is suspended from this hoist, and the holding shaft of the electric decontamination machine straddles the water tank. It is inserted into a vertical pipe provided in the center of an operating arm that is grounded at both ends, and the holding shaft and straight pipe are configured to slide up and down, but do not rotate relative to each other.

Next, the present invention will be described with reference to embodiments.

In the figure, 1 is a hook of a crane, and a decontamination machine 3 is suspended from the hook 1 via an electric hoist 2. The decontamination machine 3 has a brush motor 4 and a square holding shaft 5 connected to it.
It consists of a drive shaft that passes through the inside of the holding shaft 5 and rotates the decontamination brush 6 at its tip. A square standpipe 7 is installed on the outside of the holding shaft 5 with a slight gap.
An operating arm 8 is fixed to the standpipe 7 and extends symmetrically to the left and right, and casters 9 with brakes are attached to both ends of the operating arm 8. Furthermore, a handle 10 is provided at the end to enable manual guidance operation. End 11 of handle 10 on one side
The electric hoist cable 12, brush motor cable 13, and power cable 14 are gathered together and can be operated by a switch.

Note that the standpipe 7 is configured so that the holding shaft 5 can be attached and detached from the side. Furthermore, if one or more casters 9 are attached to one end as necessary, the grounding stability can be further improved.

Furthermore, when the diameter of the water tank 15 is large and the weight of the operating arm increases, it is also effective to connect the standpipe 7 directly to the hook 1 of the crane to support the load.

With the above configuration, the decontamination brush 6 at the tip of the decontamination machine 3 can be guided in a complicated position by the horizontal auxiliary movement of the worker 16 and the quick vertical operation of the electric hoist 2. Moreover, it is easy to maintain the guided position.

For decontamination at the side position, use the cylindrical replacement brush 17.
If it is attached to the holding shaft 5, the same operation as described above can be performed.

Next, the effects of the present invention are summarized as follows.

(1) The main body of the decontamination machine, which is heavy, can be suspended by a crane, and the approximate positioning and holding can be performed by the crane.

(2) Detailed positioning guidance and position maintenance can be performed manually in a minute and agile manner.

(3) Therefore, it is possible to decontaminate equipment of different shapes using simple means in a timely manner.

[Brief explanation of the drawing]

The figure shows a decontamination machine holding device according to the present invention. In the figure: 1... Crane hook, 2... Electric hoist, 3... Decontamination machine, 4... Brush motor,
5... Holding shaft, 6... Decontamination brush, 7... Standpipe, 8... Operating arm, 9... Caster, 10...
...Handle, 11... One end of the handle, 12...
Electric hoist cable, 13...Brush motor cable, 14...Power cable, 15...Aquarium,
16...Worker, 17...Replacement brush.

Claims (1)

[Scope of utility model registration request] An electric decontamination machine 3 is suspended from the hook 1 of the crane via an electric hoist 4, and the electric decontamination machine 3 has operating arms 8, 8 whose holding shaft 5 straddles the water tank 15 and is grounded on the floor at both ends of the water tank. The standpipe 7 is supported by a standpipe 7 provided in the center of the holding shaft 5, and the standpipe 7 is able to slide up and down with respect to the holding shaft 5, but is fitted outside the holding shaft 5 with a slight gap so as not to rotate. A holding device for a decontamination machine for radioactively contaminated equipment immersed in a water tank.