JP2003329553A - Sampling apparatus for pressure fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sampling apparatus of a pressure fluid for removing a stagnant fluid remaining in a branch pipe for sampling and then sampling the sample fluid. <P>SOLUTION: The sampling apparatus 1 is connected to a branch pipe 3 for sampling motor piping 2 where the pressure fluid flows via couplers 6, 10 and seals the pressure fluid into a sample accommodation chamber 7 of a sampling container 9 in a state where an expansion member 8 is compressed. One end opening of an outflow pipe 13 is allowed to face the inlet/outlet of the sample accommodation chamber 7 in the sampling container 9. The other end opening is extended to the outside of a sample inlet channel 4 reaching a sampling container 9 from the branch pipe 3, thus enabling the standing fluid remaining in the branch pipe to flow out via the outflow pipe. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a sampling device for collecting a sample fluid from a pipe through which a pressurized fluid such as a pressurized liquid or a pressurized gas flows.

[0002]

2. Description of the Related Art Conventionally, various sampling devices for collecting a sample fluid from a mother pipe through which a pressurized fluid such as a pressurized liquid or a pressurized gas flows have been devised.
In Japanese Patent Publication No. 00-9606, an accumulator-type sampling device having a swelling member in a sampling container is proposed.

As shown in FIG. 6, the sampling device 51 includes a sampling container 54 having an expansion / contraction member 53 in an inner space 52, and couplers 55, 56 for taking in / out the pressure fluid from the sampling container 54. , The coupler 55,
An on-off valve 57 for opening and closing a flow path to the sampling container 54 with respect to 56 is provided so that the pressure fluid is enclosed in the inner space 52 of the sampling container 54 in a state where the expansion / contraction member 53 is compressed. It is a device. Since the couplers 55 and 56 can be attached / detached with one touch, the sampling device 51 can be easily attached / detached, and the expansion / contraction member 53
Since the sample fluid collected in the inner space 52 of the sampling container 54 can be taken out by the restoring force of the above, it is not necessary to additionally install a suction pump or the like.

[0004]

By the way, in the conventional sampling device 51, a sampling branch pipe 59 is provided upright in the mother pipe 58 through which the pressure fluid flows, and the fixed side coupler 56 is attached to the branch pipe 59. However, since the pooled fluid remains in the branch pipe 59, the pooled fluid is collected in the state where the pooled fluid is mixed in at the next sampling, which causes a problem that the accuracy of the sampling analysis is lowered.

Therefore, an object of the present invention is to solve the above problems and to collect the sample fluid after removing the pooled fluid remaining in the sampling branch pipe, thereby improving the accuracy of sampling analysis. Another object of the present invention is to provide a sampling device for pressure fluid that can be used.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above object. According to the first aspect of the present invention, a sampling chamber in which the interior is divided by an expansion / contraction member to form a sample storage chamber is provided. The sample container is provided with a container and a coupler for taking in / out the pressure fluid to / from the sample storage chamber, and a sampling container is connected to the sampling branch pipe of the mother pipe through which the pressure fluid flows through the coupler to store the pressure fluid in the sample storage chamber. A sampling device for enclosing a swelling member in a compressed state, wherein one end opening of the outflow passage is arranged facing the inlet / outlet of the sample storage chamber, and the other end opening of the outflow passage is connected to the branch pipe. From the sample storage chamber to the sample storage chamber, a discharge on-off valve is provided in the middle of the outflow passage, and the on-off valve is opened to remove the accumulated fluid remaining in the branch pipe from the outflow passage. Through it characterized by being capable discharged out of the sample introduction channel by.

According to a second aspect of the present invention, an on-off valve for opening and closing the sample introduction flow path is provided on at least one of the upstream side and the downstream side of the coupler. A pressure fluid sampling device.

According to a third aspect of the present invention, a plurality of branch pipes are provided in the mother pipe, and the opening / closing valves of each branch pipe and the opening / closing valves of each outflow passage are configured as automatic valves to open / close each opening / closing valve. A control device was installed to control each branch pipe, and each sampling pipe was connected to each branch pipe, and the opening and closing time of the on-off valve was changed for each branch pipe so that the sampling fluid could be filled at different times. It is a sampling device of the pressure fluid according to claim 1 or 2 characterized by things.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 is a schematic diagram showing the sampling apparatus of the first embodiment. In FIG.
The sampling device 1 according to the present embodiment is a device that is connected to a sampling branch pipe 3 that is provided by branching from a mother pipe 2 through which a pressure fluid such as a pressurized liquid or a pressurized gas flows and that stands up. An on-off valve 5 for opening and closing a sample introduction flow path 4 to be described later is provided in an intermediate portion of the pipe 3, and a fixed-side coupler for connecting the main body portion of the sampling device 1 to the tip portion of the branch pipe 3. 6 is attached.

In the main body of the sampling device 1, a hollow sphere-shaped or hollow drum-shaped sampling container 9 in which an internal space is partitioned by a rubber bag (bladder) as an expansion / contraction member 8 to form a sample storage chamber 7 is provided. , The sampling container 9
Is provided with a moving side coupler 10 for taking in and / or taking out a sample fluid from the pressure fluid flowing through the mother pipe 2. The sampling container 9 is arranged at the upper part of the main body, and the moving side coupler 10 is The moving side coupler 10 is disposed at the lowermost part of the main body portion and is connected to the branch pipe 3
It is configured to be detachably connected to the fixed-side coupler 6 attached to the tip of the.

This type of sampling device 1 is called an accumulator system, and a gas plug 11 is attached to an upper end opening hole of a sampling container 9 in an airtight manner through an O-ring, and an expansion hole is formed from the opening hole. As shown by the solid line in FIG. 1, the expansion member 8 is inflated by filling the inside of the compression member 8 with gas, and the filling pressure is higher than atmospheric pressure, and The pressure is set to be lower than the line pressure of 2, specifically about 70 to 80% of the line pressure, and is sealed by the gas plug 11.

A sample introduction flow path 4 is formed in the short pipe extending from the branch pipe 3 to the sampling container 9, and its upper end portion is a nozzle-shaped port member facing the entrance of the sample storage chamber 7 of the sampling container 9. 12 and is fixed in the insertion hole of the boss 13 attached to the lower end opening of the sampling container 9. As described above, the sampling device 1 according to the present embodiment includes the pair of couplers 6, 10
A state in which the expansion / contraction member 8 is compressed into the sample storage chamber 7 of the sampling container 9 through which the sample fluid is connected to the sampling branch pipe 3 of the mother pipe 2 through which the pressure fluid flows. It is a device to be sealed in.

In the sampling device 1 of this embodiment, the outflow pipe 1 for letting out the pool fluid remaining in the branch pipe 3 is provided.
4 is provided, and one end opening 14a of the outflow pipe 14 is provided.
Is provided so as to face the inlet / outlet of the sample storage chamber 7 of the sampling container 9, and the other end opening 14b is provided so as to extend to the outside of the sample introduction flow path 4.
Therefore, the outflow passage 14 ′ formed inside the outflow pipe 14 is arranged with the one end opening 14 c facing the entrance and exit of the sample storage chamber 7 and the other end opening 14 d outside the sample introduction flow path 4. It is located in. Specifically, the outflow pipe 14 is hung in the flow passages of the port member 12 and the T-shaped joint 15 which constitute the upper portion of the sample introduction flow passage 4,
The one-end opening portion 14a is arranged at a position slightly apart from the inlet / outlet port of the sample storage chamber 7 so that the pool fluid can be discharged from the upper end portion of the sample introduction flow path 4 without the one-end opening 14c being blocked by the expanded and contracted member 8. The middle portion is extended to the outside of the sample introduction flow path 4 radially outward through the T-shaped joint 15 arranged in the lower portion of the port member 12, and outside the sample introduction flow path 4. A discharge on-off valve 16 is provided in the exposed portion, and a flexible tube 17 such as a vinyl tube or a rubber tube is connected to the other end opening 14b at the tip thereof. Therefore, the on-off valve 16 for discharge is opened, and the outflow passage 14 in the outflow pipe 14 is opened.
The pooled fluid flowing out through the inside of the flexible tube 17 and the flexible tube 17 is collected in a drain line or a pooled fluid recovery line (not shown) by a funnel-shaped drain receiver 18 or the like.

In this embodiment, the sample introducing channel 4 is used.
Although an on-off valve 5 for opening and closing is provided upstream of the couplers 6 and 10 (on the side of the mother pipe 2), the invention is not limited to this. By separating the moving side coupler 10 from the fixed side coupler 6, the fixed side coupler 6 automatically closes the sample introduction flow path 4, and thus the couplers 6, 10
The on-off valve 5 may be provided on the downstream side (sampling container side) of the above, or may be provided on both sides. It should be noted that the couplers 6 and 10 in the present embodiment use a quick coupler that automatically opens and closes when it is connected, but the present invention is not limited to this, and a coupler that opens and closes by an opening / closing operation is used. But it's okay. In this case, it is necessary to provide opening / closing valves on the upstream side and the downstream side of the couplers 6, 10.

Next, the operation of the sampling device 1 of the first embodiment will be described. In the sampling operation by the sampling device 1 of the present embodiment, first, the fixed-side coupler 6 attached to the tip of the sampling branch pipe 3
The moving-side coupler 10 of the sampling device 1 is connected to. At this time, the opening / closing valve 5 of the branch pipe 3 is closed, and the opening / closing valve 16 for discharging the outflow pipe 14 is also closed.

After the couplers 6 and 10 are connected, the outflow pipe 14
After slightly opening the on-off valve 16 for discharging, the on-off valve 5 of the branch pipe 3 is started to open. When the discharge on-off valve 16 is opened, the pressure in the sample introduction flow path 4 becomes atmospheric pressure or the accumulated fluid recovery line pressure (pressure lower than the line pressure of the mother pipe 2), so that the expansion / contraction is in an expanded state. The member 8 minimizes the volume of the sample storage chamber 7 and blocks the entrance and exit thereof.

In this state, when the discharge on-off valve 16 is opened little by little, the pooled fluid remaining in the branch pipe 3 due to the pressure from the mother pipe 2 passes through the couplers 6 and 10 and flows into the sample introduction flow. Flowing into the channel 4, this pooled fluid gradually rises and flows to the tip portion of the sample introduction channel 4. The tip portion of the sample introduction channel 4, that is, the sample storage chamber 7
Since one end opening portion 14a of the outflow pipe 14 is opened in the vicinity of the inlet / outlet of the outflow port, the pooled fluid flows into the outflow passage 14 'in the outflow pipe 14 through this opening portion 14a, and from the outflow pipe 14 to the flexible tube 17 It is discharged to the drain receiver 18 via the and is collected in a drain line or the like.

In this way, the pooled fluid remaining in the branch pipe 3 once flows into the sample introduction flow path 4 and then flows out of the sample introduction flow path 4 via the outflow pipe 14, that is, the outflow path 14 '. When discharged to the outside, the branch pipe 3 and the sample introduction flow path 4 are filled with the fresh pressure fluid from the mother pipe 2, and this pressure fluid is also discharged from the outflow pipe 14 to the drain receiver 18 following the accumulated fluid. Begin to be. Whether or not the fresh pressure fluid has been discharged to the drain receiver 18 depends on the volume in the branch pipe 3, the sample introduction flow path 4 and the outflow pipe 1.
Since it can be predicted from the flow rate of 4, etc., the open / close valve for discharge can be removed when the fresh fluid is filled in the branch pipe 3 and the sample introduction flow path 4 with certainty in consideration of the surplus fluid. Close 16 That is, the opening time of the on-off valve 16 for discharge is adjusted.

After closing the discharge on-off valve 16, the on-off valve 5 of the branch pipe 3 is fully opened. Then, the pressure in the sample introduction flow path 4 increases, and this pressure becomes higher than the internal pressure of the expansion / contraction member 8, so that the pressure fluid in the sample introduction flow path 4 pushes away the expansion / contraction member 8 and contracts the sample. It flows into the storage room 7. Then, as indicated by a dotted line in FIG. 1, when the internal pressure of the contracted expansion / contraction member 8 and the pressure in the sample introduction flow path 4, that is, the pressure in the mother pipe 2 are balanced, the pressure fluid is introduced into the sample storage chamber 7. Is stopped, and a sufficient amount of pressure fluid can be stored (enclosed) in the sample storage chamber 7 of the sampling container 9.

After that, the on-off valve 5 of the branch pipe 3 is closed to shut off the pressure fluid of the mother pipe 2, and then the moving side coupler 10 of the sampling device 1 is disconnected from the fixed side coupler 6 of the branch pipe 3. By separating the moving side coupler 10 from the fixed side coupler 6, the fixed side coupler 6 and the moving side coupler 1 are separated.
0 is automatically closed, which completes the collection of the pressure fluid in the mother pipe 2.

When the collection of the sample fluid is completed in this way, the main body of the sampling device 1 is transported to the analysis chamber and mounted on a jig equipped with a coupler connectable to the moving side coupler 10. Then, the sample fluid is collected in a beaker or the like arranged below it, and desired analysis is performed. When the sample fluid is collected in a beaker or the like, the restoring force of the expansion / contraction member 8 works, so that the sample fluid can be easily taken out and no pump is required.

As described above, according to the sampling apparatus 1 of the present embodiment, it is possible to collect the sample fluid after removing the pooled fluid remaining in the branch pipe 3, so that the accuracy of sampling analysis can be improved. Can be improved.

In this way, the sampling fluid of the pressure fluid flowing in the mother pipe 2 of the process line or the like can be sampled. As shown in FIG. 2, the on-off valve 5 and the outflow pipe provided in the branch pipe 3 are provided. An on-off valve for discharge 1 provided at 14
6 as an automatic valve, a plurality of branch pipes 3 and sampling devices 1 (for example, 7) are provided in the mother pipe 2, and
A control device (not shown) for controlling the opening and closing of each of the on-off valves 5 and 16 is provided, and by this control device, the opening and closing time of each of the on-off valves 5 and 16 is made different for each branch pipe 3, and the pressure fluid is supplied to each sampling container 9. It is also possible to change the time of enclosing. With this configuration, the sampling work for a predetermined period such as one week can be performed sequentially, and the labor of the work can be saved.

FIG. 3 is a schematic diagram showing the sampling device of the second embodiment. The sampling device 21 of the second embodiment is provided with a pressure gauge 22 for detecting the pressure in the sample introduction flow path 4 in the sample introduction flow path 4 extending from the branch pipe 3 to the sampling container 9. is there.
Specifically, the pressure gauge 22 is provided with a T-shaped joint 23 in the branch pipe 3 between the opening / closing valve 5 and the fixed side coupler 6, and
A pressure gauge 22 is attached to the tip of a branch pipe 24 connected to the letter joint 23, and an opening / closing valve 25 is provided in the branch pipe 24 for maintenance of the pressure gauge 22 and the like.

The sampling device 21 of the second embodiment
Basically has the same effect as the sampling device 1 of the first embodiment, but in particular, in the present embodiment, since the pressure gauge 22 for detecting the pressure in the sample introduction flow path 4 is provided, The opening degree of the on-off valve 5 at the time of discharging the accumulated fluid can be appropriately adjusted, and the accumulated fluid can be reliably removed and collected outside the sample introduction flow path 4 without intruding the accumulated fluid into the sampling container 9. It is possible.

The expansion / contraction member 8 in the second embodiment is a diaphragm type, and the diaphragm 8 is normally expanded by the pressure of the enclosed gas as shown by the solid line in FIG. When the sample fluid flows into the sample storage chamber 7 with a minimum value, the pressure causes the diaphragm 8 to contract as shown by the dotted line. Also, since the poppet 8'is provided in the center of the diaphragm 8,
The poppet 8'can surely open and close the inlet and outlet, and can reliably prevent the pooled fluid from flowing into the sample storage chamber 7 when the pooled fluid is discharged.

By the way, in the above-described first and second embodiments, the sampling devices 1 and 21 are arranged such that the upstream side of the outflow pipe 14 is arranged in the sample introduction flow path 4 and the midstream of the sample introduction flow path 4 to the downstream side. The outflow passage 14 ′ for discharging the accumulated fluid was formed by extending outwardly, but the present invention is not limited to this. For example, the sampling device shown in FIG. 4 as the third embodiment or the sampling device shown in FIG. 5 as the fourth embodiment may be used.

The sampling device 31 of the third embodiment is
The structure is basically the same as that of the first embodiment, but the structures of the sample introduction channel and the outflow channel are different. In the case of this sampling device 31, the sample introduction flow path is formed by partitioning a part of the outflow path. More specifically, of the short pipe extending from the branch pipe 3 to the sampling container 9, the upstream portion 32a of the outflow passage 32 is formed inside the port member 12 and the T-shaped joint 15, and the sampling container 9 side. The one end opening 33 arranged in the above is connected in a state of facing the entrance of the sample storage chamber 7. The outflow passage 32 of the present embodiment includes the outflow pipe 34 that forms the downstream portion 32b therein.
Is connected to the branch portion of the T-shaped joint 15, and the tip end opening 35 (corresponding to the other end opening in the present invention) of the outflow pipe 34 is arranged outside the sample introduction flow path 36 described later to form a substantially L shape. Is configured as a flow path. A discharge opening / closing valve 16 capable of converting the outflow passage 32 into an open state or a closed state is provided in the middle of the outflow pipe 34.

In addition, the upstream portion 32a of the outflow passage 32 described above.
A sample introduction pipe 37 forming a sample introduction flow path 36 is inserted into the inside of each of the T-shaped joint 15, the port member 12, and the boss 13 until just before the entrance of the sample storage chamber 7. The sample inlet tube 37 is provided with the tip opening 38 facing the entrance of the sample storage chamber 7.

When the tip opening 38 of the sample introducing tube 37 is provided at a slight distance from the inlet / outlet, the inlet / outlet of the sample storage chamber 7 is blocked by the inflating / deflating member 8 in an expanded state. When the sampling work is performed in this state, the tip opening 38 of the sample introduction pipe 37 is not blocked, and the sampling device 31 removes the pooled fluid in the branch pipe 3 from the tip opening 38 of the sampling introduction pipe 37.
To the outflow passage 32 covering the tip opening 38, and can be discharged to the outside of the sample introduction flow passage 36 through the outflow passage 32.

The sampling device 31 of the third embodiment having the above-mentioned structure can be manufactured without bending the pipes forming the sample introduction flow path 36 and the outflow path 32. Therefore, it is possible to provide a more inexpensive sampling device with reduced processing labor.

In the third embodiment, the cylindrical pipe is used as the partition member of the sample introduction flow path 36 in the upstream portion 32a of the outflow passage 32, but the partition plate extending in the longitudinal direction in the upstream portion of the outflow passage 32. May be provided to partition the sample introduction flow path from the upstream portion of the outflow path.

On the other hand, the sampling device 4 of the fourth embodiment
In the first example, a branch flow path as an outflow path is branched and opened in the middle of the sample introduction flow path 4 in the sampling device of the first embodiment, and the accumulated fluid is discharged from the branch flow path. That is, this sampling device 41
Forms a sample introduction flow path 4 in a short pipe extending from the branch pipe 3 to the sampling container 9 and is located on the inner peripheral surface of the sample introduction flow path 4 and slightly from the inlet / outlet of the sample storage chamber 7 of the sampling container 9. The one end opening 43 of the branch flow path (outflow path upstream portion) 42 is arranged at a distant position so as to face the entrance and exit. Further, in the sampling device 41, the outflow pipe 44 provided with the discharge on-off valve 16 is connected to the branch flow passage 42 to form a downstream portion 44 ′ of the outflow passage, and the tip end opening 45 (main pipe) of the outflow pipe 44 is formed. (Corresponding to the other end opening in the invention) is arranged outside the sample introduction flow path 4.

In such a sampling device 41, the open / close valve 5 '(in the present embodiment, provided on the downstream side of the coupler 10) and the open / close valve 16 for discharge are adjusted in degree of opening, and the sample is expanded / contracted by the expansion / contraction member 8. When the sampling operation is performed with the inlet / outlet of the storage chamber 7 closed, the pooled fluid flowing through the sample introduction flow passage 4 flows into the branch flow passage 42 before the inlet / outlet of the sample storage chamber 7 or flows to the outlet / inlet. After that, it flows back into the branch flow path 42 and is discharged to the outside of the sample introduction flow path 4 through the discharge opening / closing valve 16 in any case.

As described above, the sampling device 41 of the fourth embodiment does not require a special member when the branch channel 42 is branched from the sample introduction channel 4. Therefore, the sampling device 41 can realize the discharge of the pooled fluid simply by forming the flow path having a simple structure, and can provide the sampling device at a lower cost.

In each of the above embodiments, the outflow pipe 14 is always extended from the main body of the sampling device 1, 21, 31, 41, but a coupler (not shown) is provided on the proximal end side of the exposed portion of the outflow pipe 14. (3) is provided, the tip side of the on-off valve 16 for discharge can be separated, and the main body portion of the sampling devices 1, 21, 31, 41 can be easily handled.

Further, the sampling container 9 and the expansion / contraction member 8
If a material suitable for the pressurized liquid or the pressurized gas flowing through the mother pipe 2 is selected as the material of the above, it can be used as a sampling device in which it is particularly difficult to collect the sample fluid by opening it.

Although the sampling container 9 is the bladder-type or diaphragm-type expansion / contraction member 8 in each of the above-described embodiments, the expansion / contraction member in the present invention is not limited to this, and the inside of the sampling container 9 is The sample storage chamber 7 is divided to form the sample storage chamber 7, and it is sufficient that the sample storage chamber 7 is biased in a direction to reduce the volume of the sample storage chamber 7. For example, a piston provided in a cylindrical sampling container and biased by a sealed gas or a spring may be used.

[0039]

As described above, according to the present invention, one end opening of the outflow passage is provided facing the inlet / outlet of the sample storage chamber of the sampling container, and the other end opening of the outflow passage is connected to the sampling container from the branch pipe. Since the sample fluid is arranged outside of all the sample introduction flow paths, it is possible to collect the sample fluid after removing the pooled fluid remaining in the branch pipe through the outflow path. Therefore, this can improve the accuracy of the sampling analysis.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating a sampling device according to a first embodiment.

FIG. 2 is a schematic diagram showing a usage pattern of the sampling apparatus of the present invention.

FIG. 3 is a schematic diagram showing a sampling device according to a second embodiment.

FIG. 4 is a schematic diagram showing a sampling device according to a third embodiment.

FIG. 5 is a schematic diagram showing a sampling device of a fourth embodiment.

FIG. 6 is a schematic view showing an example of a conventional sampling device.

[Explanation of symbols]

1 Sampling device 2 mother piping 3 Branch pipe for sampling 4 Sample introduction channel 5 on-off valve 6 Fixed coupler 7 Sampling container sample storage room 8 expansion and contraction member 9 sampling vessels 10 Moving side coupler 11 gas plug 12 port member 13 Boss 14 Outflow pipe 14 'Outflow path 14a One end opening 14b Opening on the other end 14c Open at one end 14d other end opening 15 T-joint 16 On-off valve for discharge 17 Flexible tube 18 Drain receiver 21 Sampling device 22 Pressure gauge 23 T-joint 24 branches 25 on-off valve 31 Sampling device 32 Outflow 32a upstream part 32b downstream 33 One end opening 34 Outflow pipe 35 Tip opening (opening at the other end) 36 sample introduction channel 37 Sample introduction tube 38 Tip opening 41 Sampling device 42 Branch flow path (upstream of outflow path) 43 Open at one end 44 Outflow pipe 44 'Downstream of the outflow passage 45 Tip opening

Claims (3)

[Claims] 1. A sampling container for sampling a mother pipe through which a pressure fluid flows, comprising a sampling container having an interior defined by an expansion / contraction member to form a sample storage chamber, and a coupler for taking in / out the pressure fluid from / to the sample storage chamber. A sampling device in which a sampling container is connected to the branch pipe for use via the coupler, and a pressure fluid is enclosed in the sample storage chamber in a state in which the expansion / contraction member is compressed, and in a state of facing the inlet / outlet of the sample storage chamber. One end opening of the outflow passage is arranged, the other end opening of the outflow passage is arranged outside the sample introduction flow passage from the branch pipe to the sample storage chamber, and a discharge on-off valve is provided in the middle of the outflow passage. A sampling device for a pressure fluid, characterized in that the accumulated fluid remaining in the branch pipe can be discharged to the outside of the sample introduction flow path through the outflow path by providing the open / close valve. 2. The pressure fluid sampling device according to claim 1, wherein an on-off valve that opens and closes the sample introduction flow path is provided on at least one of an upstream side and a downstream side of the coupler. 3. A plurality of the branch pipes are provided in the mother pipe, and an opening / closing valve of each branch pipe and an opening / closing valve of each outflow passage are configured as an automatic valve, and a control device for controlling opening / closing of each opening / closing valve is provided, The sampling container is connected to each branch pipe, and the opening and closing time of the on-off valve is made different for each branch pipe so that the sampling fluid is filled in the sampling container at different times. Claim 2
A sampling device for the pressure fluid according to.