JPH0326342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sample collection device installed in a primary sample collection system of a nuclear reactor, and particularly to a sample collection device installed in a primary sample collection system of a nuclear reactor, and in particular, is used to collect the atmosphere in a reactor coolant and containment vessel under an accident condition of a nuclear power plant. An object of the present invention is to provide a portable sample collection device capable of collecting gas under conditions with as little exposure to radiation as possible.

Radiation monitoring is carried out under various radiation controls with the goal of ensuring the safety of radiation work. One of these is a sampling system that measures the radioactive concentration of reactor coolant and atmospheric gas in the containment vessel and contributes to radiation exposure countermeasures. It is one.

Conventionally, for example, when a vessel for collecting a part of the fluid is provided in a fluid passage, pipe connectors configured as described below are installed at both ends of the vessel connected to the passage. ,
The vessel can be configured to be detachable from the fluid passage. However, in this case, the vessel cannot be removed unless the pipe connectors provided at both connecting ends of the vessel are operated simultaneously. Therefore, it is extremely difficult to remove the Bethel with one hand, and it is inconvenient to handle.

Therefore, by connecting the sleeves for attaching and detaching pipe connectors placed at both connecting ends of the Vessel to a common operating rod, the applicant can easily attach and detach the Vessel by simply operating the operating rod with one hand. We developed a pipe connector device that could do this, and obtained Patent No. 1056602 (Special Publication No. 1984-47676). That is,
1 and 2, the tube connector device comprises a male connector portion 12 connected to both connecting ends of a vessel 10 and a female connector portion 13 connected to a sample collection system 15. The connector portion is provided with sleeves 18 and 20 that abut against each other under the action of coil springs 14 and 16, respectively.
A pipe connector is used in which a ball bearing 22 for locking both connector parts is provided inside the pipe connector, the other sleeve 18 is configured as a lock operation part for opening and closing the lock, and a ball valve 24 is provided in the female connector part 13. The other connector portion provided with the locking operation portion of the pipe connector is connected to both connection ends of a flow path body that is detachably attached to a part of the fluid passage, and the one connector portion is connected to each of the fluid passages. The lock operating portions of the other connector portion are connected to each other by a common operating rod 26.

By the way, in the above pipe connector device, when connecting the male connector part to the male connector part,
If both ends of the male connector bend inward or outward, causing a misalignment between the ends, when connecting the male connector to the female connector, even if one side of both connectors is connected, the other will be misaligned. They are not connected properly, which is not only inconvenient for installation, but also dangerous due to liquid leakage.

Therefore, as a result of further improved prototype production, the inventors have developed a connecting mechanism that allows the sample vessel to be connected to the sample collection system in a tethered manner, allowing sampling operators to quickly attach and detach the sample vessel. It has been found that it is possible to obtain a portable sample collection device that can be handled without water leakage.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a portable sample collection device that allows easier, more reliable, and safer operation of a sample vessel that is detachably connected to a sample collection system.

In order to achieve the above object, the present invention connects one connector that performs a male-female connection extending horizontally to both ends of a sample vessel, and connects the other connector to the sample collection system opposite to the one connector. In a sample collection device installed at a nuclear power plant, the movable sleeve is connected to one of the connectors and is connected to a movable sleeve for attaching and detaching the connector, and is connected to both ends of a sample vessel. One of the connectors connected to the sample collection system is a female connector, and the other connector connected to the sample collection system is a male connector, and the movable sleeves of the female connectors are coupled via an alignment turnbuckle. do.

In the portable sample collection device, the turnbuckle is composed of a pair of connecting rods each having a right-handed thread and a left-handed thread at one end thereof, and an adjusting screw threadedly engaged with these connecting rods, and the other end of each connecting rod. The part is connected to the end of the movable sleeve of the female connector, and the alignment operation between the female connector and the male connector can be easily achieved by adjusting the adjustment screw.

Other objects and advantages of the invention will become more apparent from the following description.

Next, a typical configuration example of the portable sample collection device according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 3, the sample collecting device according to the present invention includes an elongated sample vessel 28, female connectors 32, 32 connected to both ends of the sample vessel 28 via pipe joints 30, 30, and Basically, it consists of an operating rod 34 and a turnbuckle 36 installed at both ends of the opposing female connectors, and male connectors 40, 40 installed on the sample collection system 38 side opposite the female connectors 32, 32. It is composed of

In FIG. 4, the sample vessel 28 has female connectors 32, 32 connected via pipe fittings 30, and male connectors 40, 40 on the sample collection system side connected to the female connectors. Generally, it is structured as follows. That is, the female connector 32 has an end fitting 42,
The cap body 44 is fixed to the end fitting, and the movable sleeve 48 slides on the outer periphery of the end of the cap body 44 under the action of a coil spring 46. The tip of the cap body 44 receives a lock ball 50. An annular groove 52 for
is provided. On the other hand, the male connector 40 attached to the sample collection system side consists of an end fitting 54 and a nipple body 56 fitted to the outer circumference of the tip of the end fitting 54. is O-
The cap body 44 is sealingly connected to the cap body 44 via the ring 58 .

Note that reference numerals 60 and 60 are automatic opening/closing valves that are opened at the same time as the female connector and the male connector are connected, and are closed at the same time as they are separated.

Returning to FIG. 3 again, both ends of the operating rod 34 are connected to one end on the sample vessel 28 side of the sliding sleeve 61 surrounding the female connector 32, and the male and female are connected to each other under the pulling and pulling movements of the operating rod 34. Connect and disconnect both connectors.

Note that the sliding sleeves 61 are respectively coupled to the movable sleeves 48 of the female connectors 32.

Furthermore, the turnbuckle 36 has a pair of connecting rods 6 each having a right-handed thread and a left-handed thread on one end.
2, 62, and an adjusting screw 64 screwed together with these (in addition, in FIG. 3, only the screwed state of the screw of one connecting rod 62 and the adjusting screw 64 is shown in a partial cross-sectional view). However, the other connecting rod 64 has a similar configuration.) The other end of each connecting rod 62, 62 is attached to the other end of the movable sleeves 61, 61 of the female connectors 32, 32 with fixed arms 66, 66. connected via. That is, each connecting rod 62, 62
A right-hand thread and a left-hand thread carved on one end are screwed into both ends of the adjusting screw 64 so that they can move forward and backward, so that when the adjusting screw 64 is rotated in one direction, each connecting rod 62, 62 can be moved in its direction. Move in the direction of increasing length,
Further, by rotating the adjusting screw 64 in the other direction, each connecting rod 62, 62 moves in a direction in which its length is reduced. Therefore, by adjusting the adjustment screw 64, the female connector is aligned with the male connector, and the sample vessel 28 is moved into the sample collection system 38.
When installing the device, it is possible to perform the installation work reliably with a single operation.

Next, when performing sampling using the sample collecting device according to the present invention configured as described above, the sample vessel 28 is held and the female connector 32 is butted against the male connector 40, so that both the male and female connectors are connected. In the case of misalignment, operate the adjusting screw 64 of the turnbuckle 36 to align both the male and female connectors, and then insert the female connector 32 into the male connector 40 at once, so that both connectors are in the state shown in FIG. 4. are connected. Then, the sample water passes through the automatic on-off valve 60 and enters the female connector.
The sample is collected in the vessel 28. Therefore,
When the operating rod 34 is pulled, the movable sleeve 61 of the female connector 32 moves toward the sample vessel together with the movable sleeve 48, and when the sample vessel 28 is pulled toward the operator in this state, the lock ball 50
floats up, and the female connector and male connector are separated.

According to the sample collection device according to the present invention, in order to sample the reactor coolant and the atmospheric gas in the containment vessel, the container can be easily and reliably attached and detached using a one-touch method.

Although a typical embodiment of the portable sample collection device according to the present invention has been described above, the present invention is not limited to this embodiment, and various design changes can be made without departing from the spirit of the invention. Of course it can be done.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram of a conventional portable sample collection device, FIG. 2 is a vertical sectional view of a connection mechanism used in the portable sample collection device shown in FIG. 1, and FIG. 3 is a portable sample collection device according to the present invention. FIG. 4, which is an overall explanatory diagram of the sample collection device, is a longitudinal cross-sectional view of a connecting mechanism used in the portable sample collection device shown in FIG. 3. 28... Sample Bethel, 30... Pipe fitting, 32
...Female connector, 34...Operation rod, 36...Turnbuckle, 38...Sample collection system, 40...Male connector, 42...End fitting, 44...Couple body, 46...Coil spring, 48...Movable sleeve, 50 Lock ball, 52... Annular groove, 54... End fitting, 56... Nipple body, 5
8...O-ring, 60...Automatic on-off valve, 61...Movable sleeve, 62...Connecting rod, 64...Adjusting screw, 66
…Fixed arm.

Claims (1)

[Scope of Claims] 1. One connector extending horizontally and performing male-female coupling is connected to both ends of the sample vessel, and the other connector is connected to the sample collection system facing the one connector, In a sample collection device installed in a nuclear power plant, which comprises a movable sleeve for attaching and detaching the connector provided on the one connector and connected by a common detaching operation lever, one of the connectors is connected to both ends of the sample vessel. are respectively female connectors, and the other connectors connected to the sample collection system are male connectors, and the movable sleeves of each of the female connectors are coupled via an alignment turnbuckle. Device. 2. In the portable sample collection device according to claim 1, the turnbuckle includes a pair of connecting rods each having a right-handed thread and a left-handed thread at one end,
Consisting of these connecting rods and adjustment screws that screw together,
The other end of each connecting rod is connected to the end of a movable sleeve of a female connector.