JPH0417397B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to a fully automatic sampling device that collects radioactively contaminated liquids such as cooling water, reagent preparation liquid, waste liquid, etc. in various processes of nuclear facilities and provides them for analysis. It is.

(b) Prior Art In general, cooling water, reagent preparation fluids, waste fluids, etc. from various processes at nuclear facilities may be contaminated with radioactivity, so they are periodically sampled and analyzed for analysis. In this case, sample liquid is sent by a liquid transport device from each sampling point scattered in various processes of a nuclear facility to a sampling bench gathered at one location, and sample liquid is collected from each sampling bench.

Conventional sample liquid collection work has been carried out manually by workers, which poses a high risk of radiation exposure, lacks safety, and is not favorable in terms of work efficiency.

C. Purpose of the invention This invention automates the sample liquid collection work, and divides the work functions necessary for automatic sample liquid collection into work functions that can be performed in a radioactively contaminated area and work functions that can be performed in a non-contaminated area. The purpose is to consolidate each work function and make the entire device smaller and more compact.

D. Structure of the Invention This invention divides the work functions necessary for automatic collection of sample liquid into work functions that can be performed in a radioactively contaminated area and work functions that can be performed in a non-contaminated area. The automatic manipulator A, sampling pot B, needle block C, and parts loading/unloading means D that belong to the sampling bench body E are integrated and shielded, and the stocker F and marking device G for various parts belonging to the work function in the non-contaminated area are integrated. , a controller H, and a vacuum device I are housed in a separately installed control box J, and the sampling bench main body E and the control box J are connected by a component transport mechanism K.

E. Embodiment FIG. 1 is a front view of the entire fully automatic sampling apparatus showing an embodiment of the present invention, and shows the installation relationship between the sampling bench main body E and the control box J.

FIG. 2 is a side view of the sampling bench main body E, and the sampling bench main body E has a working chamber 2 surrounded by a sealed case 1 inside, as shown in FIG. A plurality of sampling pots E and needle blocks C are arranged around the circumference (see FIG. 4).

The sampling pot E and needle block C are constructed as shown in FIG. That is, the sampling pot E includes a liquid storage section 3, a liquid supply path 4 for supplying sample liquid to the liquid storage section 3, a liquid discharge path 5 for discharging sample liquid overflowing from the liquid storage section 3, and a liquid storage section. 3, and a residual liquid discharge path 6 provided at the bottom of the liquid storage section 3.
When a sample liquid is collected, it is supplied from a sampling point through the liquid supply path 4 by a liquid transport device (not shown).

The needle block C consists of a needle 7 and its holder 8, which are integrally constructed and are detachably attached to the upper part of the sampling pot E. A fine hole member 9 is integrally provided at the lower end of the holder 8.
is formed, and this porous member 9 is connected to the residual liquid discharge path 6.
It is attached to the inlet of the liquid storage section 3 to prevent excessive liquid from flowing out from the bottom of the liquid storage section 3.

The needle 7 of the needle block C is hollow, has a sharp upper end, and has a horizontal hole 7a near the upper end, into which the sample container 10 can be inserted. An insertion guide 8a for the sample container 10 is integrally formed on the upper part of the holder 8, and this insertion guide 8a is used as a grip when replacing the entire needle block C.

The sample container 10 is sealed with a rubber lid 11,
The interior is evacuated in advance, and in this state, the rubber lid 11 side is inserted into the needle 7, and a predetermined amount (about 10 c.c.) of sample liquid is sucked and collected from the liquid reservoir 3 of the sampling pot B.

In FIG. 3, the periphery of the sealed case 1 is directly covered with a wall 12 of a radiation-shielding material such as lead, and the overall external shape of the sampling bench main body E is approximately spherical.

As shown in FIG. 3, the sampling bench body E is divided into upper bodies _E1 and _E2 , which are assembled and connected with bolts 13, and the lower body _E2 is provided with leg rods 14. Further, a common introduction part 15 for introducing a group of liquid supply and discharge pipes to each sampling pot B is formed in the lower body _E2 .

As shown in Fig. 3, around the sampling bench main body E, an automatic manipulator A, a sampling container 10, a needle block C, a means D for carrying in and out parts such as a filter, a viewing window 16, an internal illumination light 17, etc. are arranged almost radially. It is located in

The automatic manipulator A is used for exchanging parts in the work chamber 2 and for inserting and extracting sample containers 10 into and out of the needle 7, and has a chuck 19 at the tip of the robot arm 18.
It can be controlled remotely from the outside and has a multi-axis control system that allows it to move up and down, swivel, swing, rotate, etc.
Although the embodiment shown in the drawings shows a case where it is installed at the center of the top of the sampling bench main body E, other positions are also possible.

The parts loading/unloading means D is for loading parts into the working room 2 from the outside, or transporting parts from the working room 2 to the outside. It may be composed of
In FIG. 3, a pneumatic system using air supply and exhaust is shown, in which a rotating cylinder 21 is placed inside a fixed cylinder 20.
is installed, and the rotating cylindrical body 21 has two holes 23 and 24 formed parallel to the rotation center line 22 and symmetrically with respect to the rotation center line 22.
A cylinder 25 is installed in the hole 24, and a sliding guide tube 26 is installed in the other hole 24.
is engagedly connected to a bracket 28 at the tip of a piston rod 27 of the cylinder 25 via a spring S, and is caused to move up and down by the piston rod 27 of the cylinder 25. A worm wheel 29 is integrally provided on the upper part of the rotating cylinder 21,
There is a worm 30 that meshes with this, and the worm 30 causes the rotary cylinder 21 to rotate half a turn at a time via the worm wheel 29. A component receiving portion 31 and a component entrance/exit 32 are provided at the lower end of the fixed cylindrical body 20 in correspondence with the two holes 23 and 24 of the rotating cylindrical body 21. When the parts arrive, the cylinder 25 moves in and out, leaving the parts on the parts receiving part 31 and the sliding guide tube 26 rises, and then the rotary cylinder 21 is rotated half a turn by the worm 30 and placed at the tip of the piston rod 27. Grip the component on the component receiving part 31 with the chuck 33, turn it half a turn again, and insert the gripped component into the component entrance 3.
2 side, and here, by the advance movement of the cylinder 25, it is delivered to the parts receiver 34 in the work chamber 2. Parts receiver 3
4 is rotatably supported by a pair of support rods 35 extending from the lower end of the fixed cylinder 20 via pivots 36, and a pivot lever 37 is attached to each pivot 36. This rotating lever 37 is connected to a link 3 at the lower end of an operating rod 38 that passes through the center of the rotating cylinder 21.
9, and the upper end of this operating rod 38 is connected to a cylinder 40, by which the component receiver 34 is rotated about the pivot 36 to the state shown by the solid line and the chain line in FIG. .
Above the fixed cylinder 20, a passage switching cylinder 41 is rotatably installed within the support cylinder 42.
A lid body 43 is provided on the upper part. A plurality of passages 44 , 45 , 46 are connected to the lid body 43 , and one passage 47 is formed in the passage switching cylinder 41 correspondingly, and a worm 48 and a worm wheel 49 are connected to each other.
As a result, the passage switching cylinder 41 is rotated so that one passage 47 is connected to the plurality of passages 44, 45,
46. Among the plurality of passages 44, 45, and 46, one is a passage for transporting the sample container 10 or parts such as the needle block C and the filter into the working chamber 2, and the other passages are for transporting the sample container 10 or components such as the needle block C and the filter. There is a passageway for carrying out parts such as used needle blocks C and filters, and a passageway for carrying out parts such as used needle blocks C and filters to the disposal section.

The control box J has a new sample container 10,
Needle block C, stocker F for storing parts such as filters, marking device G for displaying sampling point numbers, identification symbols, etc. on new sample containers 10, controller H for automanibrator A, parts loading/unloading means D, etc., and samples. It houses a vacuum device I etc. that evacuates the inside of the container 10, and these are omitted in the drawings.

The sampling bench main body E and the control box J are connected by a component transport mechanism K. This parts transport mechanism K is a device for supplying parts such as a new sample container, needle block C, or filter from the control box J to the parts loading/unloading means D of the sampling bench main body E.
It may be a robotic mechanism or it may be a pneumatic tube 50 as shown in the embodiment of the drawings.

Next, the operation when collecting the sample liquid will be explained. First, insert a new sample container 10 in control box J.
is prepared, and the inside of this sample container 10 is vacuumed by a vacuum device I.
After making a vacuum in advance and marking the corresponding sampling point number etc. with the marking device G, the parts are supplied to the parts loading/unloading means D of the sampling bench main body E by the parts transport mechanism K, that is, the pneumatic pipe 50 in the embodiment. It is supplied to the component receiving section 31 through the passage 44, the passage 47 of the passage switching cylinder 41, the hole 24 of the rotating cylinder 21, and the sliding guide cylinder 26. The sample container 10 supplied to the component receiving part 31 is moved in such a way that the cylinder 25 is retracted and the sliding guide cylinder 26 is raised, and then the worm 30 is driven to rotate the rotary cylinder 21 by half a rotation. The cylinder 25 is made to protrude, the chuck 33 grips the sample container 10 on the component receiving part 31, and the worm 30 is again
is driven, the rotary cylinder 21 is rotated half a rotation, and the sample container 10 held by the chuck 33 is transferred to the component entrance/exit port 32 side. In this state, the cylinder 25 moves to protrude and transfers the sample container 10 to the component receiver 34, which is waiting in advance as shown by the chain line in FIG. 3, and then the cylinder 25 once retreats. Then another cylinder 4
0 moves in and out, and the component receiver 34 is raised to the solid line state in FIG. At the same time or subsequently, the automatic manipulator A is driven, and the robot arm 18 is pivoted onto the parts receiver 34 and lowered;
Sample container 1 on component receiver 34 with chuck 19
The sample container 10 is grasped, raised, and pivoted onto the designated sampling pot E, where the sample container 10 is inserted into the needle 7 of the needle block C. In this case, the liquid reservoir 3 of the sampling pot E is filled with the sample liquid supplied from the sampling point in advance, and when the sample container 10 is inserted into the needle 7, the liquid in the liquid reservoir 3 is filled. The sample liquid is automatically filled into the sample container 10 due to the pressure difference between the atmospheric pressure acting on the liquid surface of the liquid reservoir 3 and the vacuum pressure inside the sample container 10 . After the sample liquid has been collected, the robot arm 18 of the automatic manipulator A moves up to pull out the sample container 10 from the needle 7 of the needle block C, rotates and moves it onto the component receiver 34, and holds it at this position. to descend and check 1
9 is released and the sample container 10 is transferred to the parts receiver 34. Then, the robot arm 18 rises, moves to a neutral position, etc., and waits. On the other hand, the cylinder 40 of the parts loading/unloading means D is operated in a protruding manner to tilt the component receiver 34 to the state shown by the chain line in FIG. The sample container 10 on the container 34 is gripped, and the cylinder 25 is retracted to draw the gripped sample container 10 into the fixed cylinder 20. Then, the worm 30 is driven and the rotary cylinder 21 is rotated half a turn, and the sample container 10 gripped by the chuck 33 is transferred to the component receiver 31 side of the fixed cylinder 20, and the cylinder 25 is protruded and the sample container 10 is transferred to the component receiver 31 side of the fixed cylinder 20. Place it on the receiving part 31 and chuck 3.
3 is released and the cylinder 25 is retracted, the rotary cylinder body 21 is rotated half a turn again by the worm 30, the cylinder 25 is made to protrude, and the sliding guide cylinder 26 is the part on which the sample container 10 is placed. It is lowered onto the receiving part 31. and,
The worm 48 is driven, the passage switching tube 41 is switched and rotated, and the passage 47 is switched and connected to the carry-out passage 45 to the analysis section. Next, air is sent into the lower part of the component receiving part 31 from the pipe 51, and the sample container 1
0 is sent to the analysis section by air flow. Incidentally, when the collection of the sample liquid is completed, the supply of the sample liquid from the sampling point to the sampling pot E is stopped, and the remaining liquid in the liquid storage section 3 is discharged from the remaining liquid discharge path 5.

In order to replace the needle block C, the automatic manipulator A first extracts the needle block C that has reached the time for replacement and transfers it to the parts receiver 34.
At this point, the component loading/unloading means D operates in the same manner as when the sample container 10 is unloaded, and the sample container 10 is discharged through the passage 48 to the waste treatment section. Then, a new needle block C is sent from control box J.
It is mounted on a predetermined sampling pot E by an automatic manipulator A. The filter will also be replaced at the same time.

F. Effect of the Invention This invention divides the work functions necessary for automatic collection of sample liquid into two parts: work functions that can be performed in a radioactively contaminated area and work functions that can be performed in a non-contaminated area. The automatic manipulator, sampling pot, needle block, parts loading/unloading means belonging to the functions are integrated into the sampling bench body and integrated with shielding, and the stocker, marking device, and marking device for various parts belonging to the work function in the non-contaminated area
A control box with a controller and a vacuum device installed separately is housed, and the sampling bench main body and the control box are connected by a parts transport mechanism.
The minimum necessary functions can be consolidated on the sampling bench side, the radiation shielding structure can be made smaller and more compact, the automatic collection of sample liquid can be ensured safely, and various parts and attached equipment can be consolidated on the control box side. It is easy to store, convenient to handle, and improves operability.

[Brief explanation of drawings]

FIG. 1 is a front view of the entire fully automatic sampling device showing an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is an enlarged vertical sectional view of the sampling bench body.
FIG. 4 is a cross-sectional plan view of the interior of the sampling bench main body, and FIG. 5 is an enlarged vertical cross-sectional view of the sampling pot portion. A: Automanipulator, B: Sampling pot, C: Needle block, D: Parts loading/unloading means, E: Sampling bench body, J: Control box, K: Parts transport mechanism.

Claims (1)

[Claims] 1 The work functions necessary for automatic collection of sample liquid are
The work functions that should be performed in the radioactively contaminated area and the work functions that can be performed in the non-contaminated area are divided into two, and the automatic manipulator, sampling pot, needle block, and parts loading/unloading means that belong to the working functions in the radioactively contaminated area are installed on the sampling bench. The main body is integrated and shielded, and the stocker, marking device, controller, and vacuum device of various parts that belong to the work functions in the non-contaminated area are housed in a separate control box.
A fully automatic sampling device characterized in that the sampling bench main body and the control box are connected by a parts transport mechanism.