JPH10185774A - Sample suction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sample suction device wherein there is no fear of bending a suction needle at sampling of a sample, while a sample suction needle is surely inserted in a sample jug, and a washing mechanism can be omitted for easier maintenance. SOLUTION: A guide needle placed, so formed as to protrude a thin film of a lubber cap 22 of a sample jug 20, with a space 2 which allows a sample suction needle 3 to vertically move provided inside of it is attached, while attaching/detaching allowed, to a flange part 4 of a robot hand holding part. The sample suction needle 3 is vertically moved with a solenoid plunger 11 connected to an electro-magnetic solenoid 10 and the sample suction needle 3. The guide needle is provided with a position detecting sensor 17 for conforming its position. The sample suction needle 3 is so connected to a motorized buret 9 as to suck a sample. At the flange part 4, a water channel 6 for the washing water which bursts out of the space 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample suction device for automatically sampling a pneumatic liquid sample in a glove box in a nuclear power plant or a nuclear fuel manufacturing plant, for example.

[0002]

2. Description of the Related Art For various liquids (cooling water, organic solvent, etc.) used in a nuclear power plant or the like, a sample collected before disposal is introduced into a glove box, and the remaining amount of radioisotopes is measured. And dispose of it. At a nuclear fuel manufacturing plant, samples are sampled in order to analyze samples in the manufacturing process and control quality. When sampling a sample,
As shown in FIG. 2, a thin suction needle 2 is attached to a rubber cap 22 of a sampling sample jug which is pneumatically fed into a glove box by a pretreatment robot for analysis.
1 was carefully stabbed (inserted) and aspirated to sample a defined analytical fluid volume. As shown in FIG. 3, the sampling sample jug 20 has a rubber cap 22 on the top of a container 23, and a central portion 22a into which a fine suction needle 21 is inserted is slightly thinned so as to be easily inserted. ing.

[0003]

When the sample aspirating needle 21 is inserted into the cap 22 of the sample jug 20 by the preprocessing robot for analysis, the needle 21 is bent because the needle 21 is too thin. , May not work well. Further, since the remote operation is performed by the robot hand, the thin portion at the center of the cap 22 is not always pierced, and in some cases, there is a problem that the sample suction needle 21 itself is damaged. Further, there is a problem that the washing mechanism and operation of the sample suction needle 21 after use in the glove box are complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and there is no possibility of bending a sample suction needle at the time of sampling a sample, thereby reliably inserting the sample suction needle into a sample jug. It is another object of the present invention to provide a sample suction apparatus which can omit a washing mechanism and can be easily maintained.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a sample sucking device includes a sample sucking needle (3) and a sample jug (2) having a sharp end pointed at an acute angle.
A guide needle (1) formed so as to penetrate the thin film of the cap (22) and having a space inside the sample suction needle (3) for vertically moving the sample suction needle; A robot hand gripping part (flange part 4) with a detachable needle (1), means (10, 11) for driving the sample suction needle (3) up and down, and a sample suction needle (3); It is characterized by comprising a connected sample suction means (9) and the guide needle position detection sensor (17). Further, a washing water channel (6) for the sample suction needle (3) is provided in the guide needle (1) or in the robot hand holding part (flange part 4) in which the guide needle (1) is detachable. It is characterized by:

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the configuration of the sample suction device of the present invention. Reference numeral 1 denotes a guide needle, in which a predetermined space 2 is provided, in which a sample suction needle 3 is arranged. The sample suction needle 3 is a needle for sucking a liquid sample, and the inner diameter is selected according to the amount of sample to be sucked. In this case, the suction amount of the sample is controlled by the electric burette 9 as described later, but the inner diameter of the needle affects the resolution. The point of the guide needle 1 is sharpened at an acute angle so as to break through the thin film of the cap 22 of the sample jug 20. A flange 1f is provided at the base end of the guide needle 1. The flange portion 1f is fixed by screws 5 and 5 to a flange portion 4 serving as a robot hand (not shown) holding portion.

A space 2a having a slightly larger diameter is provided inside the flange portion 4 for fixing the flange portion 1f of the guide needle 1, that is, above the space 2 in which the sample suction needle 3 is arranged. The space 2a is a space in which the solenoid plunger 11 can move up and down by a predetermined distance, as described later. A water channel 6 for cleaning is provided inside the flange portion 4, and the water channel 6 is connected to a pipe 8 for flowing cleaning water through a plug 7. That is, the sample suction needle 3 arranged inside the guide needle 1
The outer periphery is cleaned by the pipe 8 and the water channel 6 provided in the flange portion 4. The water channel 6 may be provided on the guide needle 1 side.

An electromagnetic solenoid 10 is installed on the flange portion 4. Inside the electromagnetic solenoid 10, a solenoid plunger 11 made of a magnetic material such as iron is provided.
Are arranged to be able to move up and down. The inside diameter of the solenoid plunger 11 is made of, for example, stainless steel (not necessarily stainless steel, but may be made of stainless steel) connected to the pipe 12 connected to the sample suction needle 3 and connected to the electric burette 9 for sucking the sample. A pipe 13 (corrosive material) is fixed by press fitting or the like. A flange 11f is formed on an upper portion of the solenoid plunger 11, and a spring 14 is provided between a lower surface of the flange 11f and an upper surface of the electromagnetic solenoid 10. The electromagnetic solenoid 10 and the solenoid plunger 11 are arranged in a case 15 installed on the flange 4.

Next, the flange portion 1f of the guide needle 1
A bracket 16 is fixed to the gripping flange 4, and a position detecting sensor 17 is attached to the bracket 16. The position detecting sensor 17 is a sensor for keeping the sample jug 20 and the guide needle 1 at appropriate positions. That is, as shown by the imaginary line, after the guide needle 1 is pierced into the sample jug 20 by the robot hand,
When the sample suction needle 3 sucks a sample, it determines to which position the guide needle 1 is lowered.

The operation of the sample suction device having the above configuration will be described. (1) The robot hand (not shown) holding the flange 4 brings the guide needle 1 to the center of the sample jug 20. (2) When the positioning of the guide needle 1 is completed, the robot hand is lowered downward, and the guide needle 1 pierces the cap 22 of the sample jug 20. (3) When the specified amount of insertion position is reached, the position detection sensor 17 operates to stop the operation of the robot hand. (4) Next, when the electromagnetic solenoid 10 is actuated, the solenoid plunger 11 fixing the pipe 13 connected to the sample suction needle 3 is lowered against the urging force of the spring 14 to fall into the liquid sample. enter. Then, the electric buret 5 is operated to suck a specified amount of the liquid sample. The control of the suction amount is performed by the electric burette 9, but is a function different from that of the present mechanism. (5) When the suction of the sample is completed, washing water is injected from the pipe 8 and jetted from the water channel 6 of the flange portion 4 to wash the periphery of the sample suction needle 3 and then the robot hand is pulled upward.

The structure of the sample suction device of the present invention is as described above. The flange portion 1f of the guide needle 1 and the flange portion 4 serving as the robot hand holding portion are fixed by the screws 5 and 5, but the one-touch type. May be used.
Note that the shape and structure of the tip of the guide needle 1 are
Another shape may be used as long as it is easy to pierce the zero rubber cap 22. In the sample suction device of the present invention, the means for lowering the sample suction needle 3 uses the electromagnetic solenoid 10, but may be a fluid cylinder such as an air cylinder or a hydraulic cylinder, or a pinion and a rack mechanism. Further, the sample suction means is an electric burette 9.
However, other suction means such as a suction pump may be used.

[0012]

As described above in detail, according to the sample suction device of the present invention, it is possible to prevent breakage or bending when the sample suction needle is pierced into the cap of the sample jug.
In addition, since the guide needle protects the sample suction needle, the positioning of the sample jug is facilitated, and the work efficiency is improved. Further, since the cleaning function of the sample suction needle is also provided, there is no need to separately provide a suction needle cleaning function, and there are various effects such as a simplified structure and improved maintenance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a sample suction device of the present invention.

FIG. 2 is a diagram illustrating a configuration of a conventional suction device that suctions a sample from a sample jug.

FIG. 3 is a view showing a structure of a cap provided in two upper portions of a sample jug.

[Explanation of symbols]

 1 Guide Needle 1f Flange 2 Guide Needle Internal Space 3 Sample Suction Needle 4 Flange 5 Screw 6 Washing Channel 8 Pipe 9 Electric Bullet 10 Electromagnetic Solenoid 11 Renoid Plunger 12 Pipe 13 Hard Pipe 14 Spring 16 Bracket 17 Position Detection Sensor 20 Sample Jug 22 Cap

Claims (2)

[Claims] 1. A sample suction needle, and a pointed portion is sharpened at an acute angle so as to penetrate a thin film of a sample jug cap, and a space is provided inside the sample suction needle so that the sample suction needle can be moved up and down. An arranged guide needle, a robot hand gripping part that allows the guide needle to be detachable, a unit that drives the sample suction needle up and down, a sample suction unit that is connected to the suction needle, and the guide needle A sample suction device comprising: a position detection sensor. 2. The sample suction device according to claim 1, wherein a washing water channel for the sample suction needle is provided in the guide needle or in a robot hand holding portion where the guide needle is detachable.