JP2000009606A - Sampling apparatus for pressurized fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sampling apparatus in which a sampling container is loaded and unloaded simply and in which a suction pump is not required in the sampling operation of a pressure fluid by a method wherein the pressurized fluid is sealed in the inside space of the sampling container in a state that an expansion member is compressed. SOLUTION: A gas at a prescribed pressure is sealed in a bladder inside a sampling container 1. The inside of the sampling container 1 and that of a pipe 2 are made vacuum or set to a state that a sampling operation is not influenced. A pressure liquid sampling is sealed. A quick coupler 3 is coupled to a quick coupler 6, and an opening and shutting valve 4 is opened. Then, the pressurized liquid sample flows into the sampling container 1 from the side of a pipe 5, it compresses the bladder upward, and it flows into an expanded inside volume. After that, the opening and shutting valve 4 is closed, the pressurized fluid sample in a prescribed amount is sealed inside the sampling container 1. The quick coupler 3 is separayed from the quick coupler 6 so as to be coupled to a quick coupler at an analyzer. Then, the pressure fluid sample is pushed out wholly by the expansion pressure of the bladder to the analyzer by opening the opening and shutting valve 4, and it does not come into contact with the outside air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampling device for sampling a pressurized fluid such as a pressurized liquid or a pressurized gas.

[0002]

2. Description of the Related Art As a device for sampling a pressure fluid, there is a device as shown in FIG. Here, quick couplers 23 and 24 are attached to the ends of the pipes 21 and 22 through which the pressure fluid flows on the processing apparatus C side, and the quick couplers 23 and 24 are paired with the male and female quick couplers 25 and 26. , Piping 27, 28, on-off valves 29, 30,
A sampling assembly D including a sampling container 31 is attached.

At the time of sampling, the quick couplers 23 and 25 and 24 and 26 are connected to each other,
9 and 30 are opened to allow the pressurized fluid to pass through the sampling vessel 31 from the processing apparatus C side, and then the on-off valves 29 and 30 are closed, and then the quick couplers 23, 25, 24 and 26 are separated. A pressure fluid sample is taken in the inside. The pressure fluid sample collected in the sampling container 31 is suctioned and taken out by a pump or the like, and is analyzed by an analyzer.

[0004]

However, in the sampling device described above, the quick coupler 2 on the processing device C side is used.
Since the sampling plates 3 and 24 are fixed, and the pipes 27 and 28 of the sampling assembly D are not flexible, it is difficult to attach and detach the assembly D. That is, it is necessary to operate the quick coupler in two places at the same time, and the operation requires skill.

Further, since two quick couplers need to be aligned on the processing device C side and the assembly D side, a predetermined accuracy is required for assembly after disassembly of the assembly D, and it is difficult to disassemble and assemble. .

Further, when a pressure fluid sample collected in the container 31 is taken out, a suction pump is required to prevent the pressure fluid sample from coming into contact with air.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a pressure fluid in which a sampling vessel can be easily attached and detached and a suction pump is not required for taking out a pressure fluid sample. To provide a sampling device.

[0008]

According to a first aspect of the present invention, there is provided a sampling container having an expansion / contraction member in an inner space, and a coupler for taking in / out a pressure fluid from / to the sampling container. An opening / closing valve for opening and closing the sampling container with respect to the coupler, wherein the pressure fluid is sealed in the inner space of the sampling container in a state where the expansion / contraction member is compressed.

According to a second aspect of the present invention, in the first aspect, the expansion / contraction member comprises a bladder filled with a gas having a pressure lower than the pressure of the pressure fluid.

According to a third aspect of the present invention, in the first aspect, the expansion / contraction member comprises a diaphragm in which a gas having a pressure lower than the pressure of the pressurized fluid is sealed on the back side.

In a fourth aspect based on the first aspect, the expansion / contraction member is constituted by a piston having a pressing force set to be lower than the pressure of the pressure fluid.

According to a fifth aspect of the present invention, in the first or second aspect, the sampling container is constituted by a plurality of separable and assemblable members.

In a sixth aspect based on the first to fifth aspects, the sampling container is provided with a viewing window.

According to a seventh aspect of the present invention, in the first to third aspects, an adjusting means for adjusting the pressure of the sealed gas is provided.

[0015]

FIG. 1 is a diagram showing a configuration of a sampling device according to an embodiment of the present invention. 1 is a sampling vessel, 2 is a pipe attached to the vessel 1, and a quick coupler 3 is attached to the tip of the pipe 2 and an open / close valve 4 is attached in the middle. The above constitutes the sampling assembly A. 5 is a sampling pipe attached to the processing apparatus B side, and 6 is a quick coupler at the tip of the pipe 5. The quick couplers 3 and 5 form a male-female relationship.

As shown in FIG. 2A, the sampling vessel 1 has a bladder (such as a rubber balloon) having a compression restoring property in its internal space and is made of a material resistant to a built-in gas or a pressure fluid sample. .) 7 and the bladder 7
Is filled with gas G from the injection plug 8. The injection plug 8 also functions as a pressure adjusting member that partially removes the internal gas.

At the time of sampling, a gas G of a predetermined pressure (a pressure lower than the pressure of the pressure fluid on the pipe 5 side and the pressure at which the bladder 7 occupies the whole inside the container 1) is applied to the bladder 7 in the sampling container 1 in advance. And the inside of the sampling container 1 and the pipe 2 is evacuated, or a fluid that does not affect the sampling is sealed therein.

In this state, when the quick coupler 3 is connected to the quick coupler 6 and the on-off valve 4 is opened, the pressure fluid sample S flows into the sampling vessel 1 from the pipe 5 side, and as shown in FIG. As shown, the bladder 7 is contracted and deformed upward to expand the internal volume and flow there.

Accordingly, when the on-off valve 4 is subsequently closed, a predetermined amount of the pressure fluid sample S is sealed in the sampling vessel 1, so that the quick couplers 3 and 6 are separated, and then the quick coupler 3 is moved to an analyzer (not shown). When the open / close valve 4 is opened, the pressure fluid sample S in the sampling container 1 is connected to the bladder 7 by the analyzer.
Are all extruded by the inflation pressure. At this time, the pressure fluid sample S in the sampling container 1 does not come into contact with external air.

If the sampling vessel 1 is provided with a long window 1a along the direction in which the bladder 7 expands and contracts as shown in FIG. Can be visually confirmed.

As shown in FIG. 3 (b), if the container 1 is divided into upper and lower parts to form half containers 1b and 1c, which can be connected by flanges 1d and 1e, the internal inspection and cleaning can be performed. Becomes easier. In addition, the container may be oval or spherical.

Further, as shown in FIG. 3 (c), a diaphragm 9 is attached to the bottom surface of the hemispherical container 1 ', and a pressure gas G is sealed therein so that a pressure fluid sample flows from the bottom surface. It can also be configured. According to this, when the pressure fluid sample is collected, the deformation of the diaphragm 9 becomes a hemispherical shape, no bias force is applied, and the sample is discharged by the restoring force of the diaphragm 9. Almost no stress is applied.

Further, as shown in FIG. 3D, a piston 11 which moves forward and backward by the elasticity of the spring 10 can be used. At this time, the elasticity of the spring 10 is made smaller than the pressure of the pressure fluid to be taken therein, and the container 1 ″
Need to have a cylindrical shape.

Further, the quick couplers 3 and 6 are not limited to those described above, and may be any coupler that can couple / separate the pipes in an airtight state.

[0025]

As described above, according to the present invention, the sampling device can be connected to the processing device with a single coupler, so that the attachment / detachment operation is easy and the workability is improved. Also, there is no need to align the coupler when assembling the sampling device. Further, since the collected pressure fluid sample is pushed out by the expansion or restoring force of the expansion / contraction member in the sampling container, a suction pump for removing the pressure fluid sample is not required.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a sampling device of the present invention.

FIGS. 2A and 2B are cross-sectional views of a sampling container. FIG. 2A is a diagram illustrating a state where a sample is not collected, and FIG.

FIGS. 3 (a), (b), (c), and (d) are explanatory diagrams of another example of the sampling device.

FIG. 4 is an explanatory diagram showing a configuration of a conventional sampling device.

[Explanation of symbols]

1, 1 ', 1 ": sampling container, 2: piping, 3: quick coupler, 4: open / close valve, 5: piping, 6: quick coupler, 7: bladder, 8: injection plug, 9: diaphragm, 10: spring , 11: piston, 21, 22:
Piping, 23, 24, 25, 26: quick coupler, 2
7, 28: piping, 29, 30: open / close valve, 31: sampling container.

Claims (7)

[Claims] 1. A sampling container having an expansion / contraction member in an inner space, a coupler for taking in / out a pressure fluid from / to the sampling container, and an opening / closing valve for opening / closing the sampling container with respect to the coupler. A pressure fluid sampling device, wherein the pressure fluid is sealed in the inner space of the sampling container with the expansion / contraction member compressed. 2. The sampling apparatus according to claim 1, wherein said expansion / contraction member comprises a bladder filled with a gas having a pressure lower than the pressure of said pressure fluid. 3. The sampling apparatus according to claim 1, wherein the expansion / contraction member is formed of a diaphragm in which a gas having a pressure lower than the pressure of the pressurized fluid is sealed on a back side. 4. The sampling device according to claim 1, wherein said expansion / contraction member comprises a piston set to a pressure lower than the pressure of said pressure fluid. 5. The sampling device according to claim 1, wherein the sampling container is constituted by a plurality of members that can be separated and assembled. 6. The sampling device according to claim 1, wherein a viewing window is provided in the sampling container. 7. The sampling apparatus according to claim 1, further comprising adjusting means for adjusting the pressure of the sealed gas.