JPH10221224A - Gas component adsorbing tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability and analysis accuracy by freely switching the opened/closed states of the end sections of a tube main body. SOLUTION: This gas component adsorbing tube 10 is provided with cover members 3, 4 as opening/closing means, the flow ports 27, 28 of a tube main body 2 are freely opened or closed, no fitting/removing action is required for each work, the complexity of the work is eliminated, and workability is improved. The cover members 3, 4 are opened or closed while the devices required for the washing, adsorbing, and desorbing processes are kept connected to the end sections of the gas compound adsorbing type 10. The flow ports 27, 28 of the tube main body 2 are not exposed to the outside air during the period to the desorbing action from after the washing of the gas component adsorbing tube 10, the adsorption of the impure components of the outside air to an adsorbent 24 is effectively prevented, the effect of the impure components in the analysis of a specific component is effectively suppressed, and the analysis accuracy can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas component adsorption tube, and more particularly to a clinical examination, a medical condition management, a health examination, a drunk driving and a drug control, a fire cause investigation, and an atmospheric environment investigation in an industrial field in a medical field. The present invention relates to a gas component adsorption tube used for the like.

[0002]

2. Description of the Related Art When a rare specific component contained in a gas sample is analyzed by an analyzer using a gas chromatograph (GC) or the like, the gas component adsorption tube is washed as a pretreatment, and the gas sample is placed in the gas component adsorption tube. It is necessary to adsorb and concentrate the specific component by passing through, and finally to desorb the specific component that has been adsorbed and concentrated.

[0003] As shown in FIG.
Reference numeral 00 denotes a tubular member which is open at both ends and penetrates from one end to the other end. An adsorbent (tenax, carbo trap, etc.) 101 for adsorbing a specific component in the gas sample is provided between the ends. Glass wool 102 for preventing leakage of the adsorbent is sealed on both sides. FIG. 7B shows a gas component adsorption tube 110 provided with a small-diameter portion 103 having a small diameter inside a tube in order to prevent the glass wool 102 from shifting.

[0004] Each of the gas component adsorption tubes 100 and 110 is heated from the outside as a preparation before analyzing a gas sample, and a cleaning gas is fed from one end thereof to clean the adsorbent. Next, the gas sample is fed into the gas component adsorption tube, and the specific component is adsorbed on the adsorbent.

[0005] The gas component adsorption tube on which the specific component has been adsorbed is set in a thermal desorption device and heated to 150 to 350 [° C] by an internal heater. Thus, thermal desorption of the specific component contained from the adsorbent of the gas component adsorption tubes 100 and 110 is performed. When the gas component adsorption tubes 100 and 110 are attached to the thermal desorption device for a gas component adsorption tube, one end of the gas component adsorption tubes is connected to a communication tube communicating with the carrier gas cylinder side, and at the same time, the other end is connected. Is connected to a communication pipe that communicates with the analyzer. At the time of heating, the carrier gas is supplied from one side, and the desorbed specific component is sent to the gas sample analyzer with the flow of the carrier gas. Then, the analysis is performed by a gas chromatograph.

[0006] Until the above steps are performed, the gas component adsorption tube, which has been washed or adsorbed a specific component, enters the dust and adsorbs the adsorbed component until the analysis is started. In order to prevent leakage or the like, a detachable gas component adsorption tube cap has been attached to both ends of the opening.

[0007]

However, it is necessary to attach and remove the gas component adsorption tube cap to open both ends of each of the gas component adsorption tubes in each of the washing, adsorption and analysis steps. Because such attaching and detaching work is complicated,
Work efficiency was reduced.

Further, when the cap for the gas component adsorption tube is attached or detached, the outside air enters the gas component adsorption tube, the impurity component in the outside air is adsorbed on the adsorbent, or the gas sample already adsorbed is identified. Components leaked to the outside and hindered accurate analysis.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas component adsorbing tube which can improve the disadvantages of the prior art, improve workability, and prevent mixing of components of the outside air.

[0010]

According to the first aspect of the present invention,
A gas comprising a tubular tube main body through which a gas sample can freely pass from one end to the other end, and an adsorbent sealed inside an intermediate portion of the tube main body and adsorbing a specific component in the gas sample. In the component adsorption tube, each end of the tube main body is provided with an opening / closing means for freely switching between an open state and a closed state of each end.

In such a configuration, at the time of cleaning, one end of the tube main body is connected to the supply source of the cleaning gas, and each end of the tube main body is opened by operating the opening / closing means. Then, the cleaning gas is supplied while heating the pipe body. The cleaning gas is discharged from one end to the outside of the pipe body through the other end via the adsorbent. At this time, the specific components and the like adsorbed in the adsorbent inside the pipe main body are desorbed and discharged to the outside together with the cleaning gas. After the cleaning is completed, each end is closed by the opening / closing means until the gas sample is adsorbed.

When the gas sample is adsorbed, the supply source of the gas sample is connected to one end of the tube body, and if necessary, a suction pump is connected to the other end. Each end is opened by the operation of the opening / closing means, and the suction pump is driven to suck the gas sample through the gas component adsorption tube.
As a result, the gas sample passes through the adsorbent from one end and passes through the other end. Thereby, the specific component in the gas sample is adsorbed on the adsorbent. After the end of the adsorption, each end is closed by the opening / closing means until the gas sample is analyzed.

At the time of analysis, a gas component adsorption tube is attached to a desorption device. At this time, one end of the tube body is connected to the carrier gas supply side, and the other end is connected to the analyzer. Then, each end of the tube main body is opened by operating the opening / closing means. Next, a carrier gas is supplied while heating the tube body. This carrier gas is a so-called inert gas, and nitrogen or the like is used.

[0014] The carrier gas passes from one end through the adsorbent to the other end. Thus, the specific component desorbed from the adsorbent by heating is sent to the analyzer together with the carrier gas. The desorbed specific components are analyzed by a gas chromatograph of the analyzer.

A second aspect of the present invention has the same structure as the first aspect of the present invention, and further has a tube main body formed in a cylindrical shape, and each end thereof is substantially perpendicular to the longitudinal direction of the tube main body. In addition to closing the opening and closing means, each of the end faces is provided with a flow opening penetrating through the inside of the pipe body, and each opening / closing means is freely rotated in a direction along the peripheral surface of the pipe body to slide in contact with the end face. It is formed in a bottomed cylindrical shape having an end surface, and a through hole is provided in the sliding end surface so as to overlap with each flow opening by rotation of the opening / closing means.

In this configuration, the same operation as that of the first aspect of the invention is performed, and the opening and closing operation of each end of the gas component adsorption tube is performed by each rotatable opening / closing means provided in the tube main body. . That is, when closing each end of the pipe main body, each opening / closing means is rotated, and its through-hole is positioned at a position where it does not completely overlap with the corresponding through-hole, whereby each through-hole is covered with a cover member. Is closed by the sliding end face of

When each end of the pipe body is to be opened, each opening / closing means is positioned by rotation of the opening / closing means at a position where its through-hole overlaps the corresponding through-hole. Is opened to the outside through each through hole.

The present invention is intended to achieve the above-described object by the above-described configuration.

[0019]

1 to 6 show an embodiment of the present invention.
It will be described based on. In the present embodiment, a tubular tube body 2 that allows a gas sample to pass freely from one end 21 to the other end 22 and a specific component contained in the gas sample that is sealed inside an intermediate portion 23 of the tube body 2. And an adsorbent 24 for adsorbing. Each end 21 and 22 of the tube main body 2 is attached to each end 21,
2 shows a gas component adsorption tube 10 equipped with lid members 3 and 4 as opening / closing means for freely switching between an open state and a closed state of 22. This gas component adsorption tube 10
Is almost entirely formed of stainless steel.

As shown in FIG. 1 (B), the inside of the tube body 2 is formed in a hollow cylindrical shape.
22 is an end face 25, 2 perpendicular to the longitudinal direction of the pipe main body 2.
Blocked by 6. Further, the inside of the tube body 2 is set to have a uniform inner diameter over the entire length thereof, but the outer diameter of the outer peripheral surfaces 21A and 22A of both end portions 21 and 22 is larger than that of the intermediate portion 23. The diameter is set to be a small diameter, and a step is formed at the boundary between the end portion 21 and the intermediate portion 23 and between the end portion 22 and the intermediate portion 23.

With the small-diameter outer peripheral surfaces 21A and 22A formed at the ends 21 and 22 in contact with the inner peripheral surfaces of the lid members 3 and 4 described later, the lid members 3 and 4 are connected to the tube. Equipped on the main body 2. In the vicinity of the center on each of the end faces 25 and 26, a flow port 2 penetrating from the outside to the inside of the pipe body 2
7, 28 are drilled. These distribution ports 27, 28
Are formed in a semicircular shape of the same size, and each end face 2
5 and 26, each is provided at a position slightly deviated from the central axis of the tube main body 2 so as not to intersect the central axis. Regarding the relative positional relationship with the flow ports 27 and 28, the flow port 27 is placed along the center axis of the pipe body 2 on the end face 2.
6 is set so as to overlap with the distribution port 28 with almost no shift when projected onto the distribution port 6. Each distribution port 27, 2
When the gas passes from one of the flow ports to the other flow port, the two flow ports 27 and 28 are arranged on the same straight line along the pipe main body 2 when the gas passes from one of the flow ports to the other flow port. Therefore, the flow of gas is not disturbed, and the efficiency of washing, adsorption, and desorption described later can be improved.

As the adsorbent 24, tenax, carb trap, or the like is used. As shown in FIG. 4A, inside the intermediate portion 23 of the tube body 2, glass wool 24A through which gas can freely pass on both sides thereof is used. , 24A so that no leakage occurs. Such an adsorbent 24
Is limited to the inside of the intermediate portion 23, and is not disposed at a position where the lid members 3 and 4 of the tube body 2 overlap. This facilitates the transfer of heat from the outside to the adsorbent 24 during heating in cleaning and desorption of the gas component adsorption tube 10 described later.

As shown in FIG. 1, the lid members 3 and 4 are cylindrical members whose one end is closed by circular sliding end surfaces 31 and 41, and each end 21 , 22 are inserted into the pipe body 2. Lid member 3,
The inner diameter of the tube body 4 is set to be substantially equal to the outer diameter of the tube body 2 within a range that does not hinder the insertion.
26 is entirely contacted. The outer diameter of each of the lid members 3 and 4 is made equal to the outer diameter of the intermediate portion 23 of the pipe main body 2, and each of the lid members 3 and 4 has the above-mentioned outer peripheral surface of the pipe main body 2. The gas component adsorption tube 1 is inserted up to the step.
0 has a uniform outer diameter in the longitudinal direction. This outer diameter is set to the same size as that of a conventional gas component adsorption tube, and at the same time, the overall length of the gas component adsorption tube 10 in a state where each of the lid members 3 and 4 is provided is conventional. It is set the same as the gas component adsorption tube.

Further, the outer peripheral surface 21 of the pipe main body 2 in contact with each other
A, 22A, the end surfaces 25, 26, the inner peripheral surfaces of the lid members 3, 4 and the sliding end surfaces 31, 41 are all finished (for example, homing) so that their surfaces are smooth. I have. Thereby, the pipe main body 2 and the lid members 3, 4
Sufficient sealing performance at each connecting portion is ensured.

As described above, each of the lid members 3, 4 can be freely inserted into and removed from the tube body 2 by insertion, and can be freely rotated along the outer peripheral surfaces 21A, 22A of each tube body 2. be able to. At this time, the outer peripheral surface 21A of the pipe body 2
22A, the end faces 25 and 26, the inner peripheral faces of the lid members 3 and 4, and the sliding end faces 31 and 41 rotate while sliding with each other.

The sliding end surfaces 31, 41 of the lid members 3, 4 are provided with through holes 32, 42 near the center thereof so as to penetrate the sliding end surfaces 31, 41. These through holes 32 and 42 are formed in a semicircular shape, and are provided at positions that do not overlap the centers of the respective sliding end surfaces 31 and 41 and near the centers. Furthermore, these through holes 32, 42
Are positions corresponding to the flow ports 27 and 28 provided in the pipe body 2 (positions at which the through-holes 32 and 42 are overlapped with the respective flow ports 27 and 28 by rotation of the lid members 3 and 4 in the mounted state). ). FIG. 2 shows these positional relationships.

FIG. 2A shows the gas component adsorption tube 10 in FIG.
It is the figure seen from the left side (right side) in (A). At this time, the through-hole 32 (42) of the lid member 3 (4) and the flow port 27 (28) of the pipe main body 2 are located at positions opposite to each other with respect to the center of the end face, and do not overlap each other at all. ,
Since the sliding end face 31 (41) and the end face 25 (26) are in contact with each other, the flow port 27 (28) is located in a region other than the through-hole 32 (42) on the sliding end face 31 (41). The gas is not blocked inside the pipe main body 2 due to being closed. Hereinafter, a state in which the two ports do not overlap at all and gas does not flow is referred to as a closed state.

FIG. 2B is a view showing a state where the cover member 3 (4) is rotated by 180 ° from the state of FIG. 2A. At this time, the through-hole 32 (42) and the distribution port 27 (2
8) is a position at which the gas flows between the inside and the outside of the pipe main body 2 through the through-hole 32 (42) and the flow port 27 (28). Hereinafter, a state in which the two ports overlap each other and gas can flow therethrough is referred to as an open state. Note that hatched portions in the figure indicate a state in which holes overlap each other.

It should be noted that the distribution ports 27 and 28 and the through ports 32 and 4
The size of each of the two may be unified with those overlapping each other, or when the flow port 27 is larger than the through port 32, the flow port 28 is also set to be larger than the through port 42 so that the If the opening is larger than the opening 27, the through hole 4
In order to set 2 larger than the distribution port 28, the sizes of the through-holes and the distribution ports are unified, and one of the through-hole and the distribution port may be made larger or both may be the same size. desirable.

In the desorption process of the gas component adsorption tube 10 described later, both the cover members 3 and 3 of the gas component adsorption tube 10 are attached to the desorption device.
4 are fixed at the same time, the opening and closing operations of the flow ports 27 and 28 are performed simultaneously by the rotation operation of the pipe main body 2. In this case, the sizes of the through ports and the flow ports are unified, and the through ports are unified. By increasing either one of the flow ports or the flow ports, it is not necessary to strictly align the through-holes and the flow ports, and the operability is improved.

The distribution port 27 (28) and the through port 32
The arrangement of (42) is set to a position that does not overlap the center of each of the end faces 25, 31 (26, 41) provided. However, the arrangement is not particularly limited, and the lid member 3 is not limited to this.
By the rotation of (4), the distribution port 27 (28) and the through-hole 32
(42) may be switched between a state where it does not overlap at all and a state where it slightly overlaps. Therefore, the distribution port 27 (2
Either 8) or the through-hole 32 (42) may be at a position where it overlaps the center of each end face.

Further, the distribution ports 27 and 28 and the through ports 32 and 4
The two shapes are preferably the same shape, but are not limited to the above shapes. For example, the distribution ports 27 and 28 and the through ports 32 and 42 need not be semicircular. These distribution ports 27 and 28 and the through-holes 32 and 42 are positioned at the same distance from the center of each end face where they are drilled and shifted from the respective centers (the center is located in the inner area of each port). Position) and each of the lid members 3, 4
Any shape can be used as long as the shape can be switched between a state in which even some of them do not overlap with each other and a state in which even some of them overlap.

For example, as shown in FIG.
(28) and the through-hole 32 (42) may be two circular holes formed symmetrically with respect to the center respectively. In addition, regarding the radius of each of these circular holes and the distance from the center point, each circular hole as the distribution port 27 (28) and the through-hole 32 (4
It is necessary to adjust the size so that each circular hole as 2) does not overlap each other (closed state: see FIG. 3A). FIG. 3B shows the distribution port 27.
(28) and the through-hole 32 (42) overlap each other (open state).

Hereinafter, the operation of this embodiment will be described with reference to FIG.

In analyzing the specific components contained in the gas sample, the gas component adsorption tube 10 is washed, the specific components in the gas sample are adsorbed (concentration by adsorption), the adsorbed specific components are desorbed, and the gas chromatograph is used. An analysis is performed.

Normally, the gas component adsorption tube 10 has the structure shown in FIG.
As shown in the figure, each of the lid members 3 and 4 is
8 is rotated to the closed position and positioned. Thereby, the inside of the tube main body 2 of the gas component adsorption tube 10 is closed.

When cleaning the gas component adsorption tube 10, FIG.
As shown in (B), a cleaning gas cylinder (not shown) is connected to the through-hole 42 side of the lid member 4 via a pipe, and
Is opened to the atmosphere. As a cleaning gas, a nitrogen gas, a helium gas, or the like is used.

Then, since the cover member 4 is fixed by the pipe from the cleaning gas cylinder, the pipe main body 2 is rotated with respect to the cover member 4, and the circulation port 28 is opened. At the same time, the lid member 3 is also rotated, and the circulation port 27 is also opened. At this time, the gas component adsorption tube 10 is attached to the heater H that heats the tube body 2 from the outside, and the cleaning gas is sent into the tube body 2 from the circulation port 28 side simultaneously with the heating.

The supplied cleaning gas passes through the inside of the pipe main body 2 through the flow opening 28 and is further discharged outside through the flow opening 27. At this time, the gas component adsorption tube 10
Unnecessary adsorbed components already adsorbed on the adsorbent 24 are desorbed by the heating, and the unnecessary adsorbed components are discharged to the outside of the pipe main body 2 together with the cleaning gas.

After the washing is completed, the lid member 3 and the pipe main body 2 are rotated, and the flow ports 27 and 28 are returned to the closed state (FIG. 4 (A)). Tube 10
Are stored in a state of being shielded from the outside air.

Next, as shown in FIG. 4C, an operation of adsorbing a specific component in the gas sample is performed. At the time of suction, a container (a Tedlar bag or the like: not shown) accommodating a gas sample is connected to the through-hole 32 side of the lid member 3 via a pipe, and the suction is provided to the through-hole 42 side of the lid member 4. A pump (not shown) is connected via a pipe. At this time, each through-hole 3
The relative positions of the through-holes 42 and 42 are such that when the through-hole 32 is projected toward the lid member 4 along the central axis of the pipe body 2,
The lid members 3 and 4 are positioned so as to overlap with each other, and are connected to the respective pipes.

Then, the pipe body 2 is rotated to open the flow ports 27 and 28 (since the lid members 3 and 4 are fixed by pipes). Thereafter, the suction pump is driven to suck the gas sample in the container via the gas component adsorption tube 10. That is, the gas sample passes through the inside of the tube main body 2 through the flow opening 27 and is discharged from the inside of the tube main body 2 to the outside through the flow opening 28. The agent 24 adsorbs a specific component in the gas sample. After the end of the adsorption, the rotation of the tube body 2 causes the flow ports 27, 2 to be analyzed until the gas sample is analyzed.
Reference numeral 8 denotes a closed state, and the gas component adsorption tube 10 is stored in a state where it is shut off from the outside air.

Finally, as shown in FIG. 4 (D), an operation of desorbing a specific component in the adsorbed gas sample is performed. An analyzer (not shown) is connected to the through-hole 32 side of the lid member 3 via a pipe, and a carrier gas cylinder (not shown) is connected to the through-hole 42 side of the lid member 4 via a pipe. As the carrier gas, a nitrogen gas, a helium gas, or the like is used. At this time, as in the case of the suction operation, each through-hole 3
The relative positions of the through-holes 42 and 42 are such that when the through-hole 32 is projected toward the lid member 4 along the central axis of the pipe body 2,
The lid members 3 and 4 are positioned so as to overlap with each other, and are connected to the respective pipes.

Then, the pipe main body 2 is rotated to open the flow ports 27 and 28 (since the lid members 3 and 4 are fixed by pipes). At this time, the gas component adsorption tube 10 is attached to the heater H that heats the tube body 2 from the outside, and the carrier gas is sent into the tube body 2 from the circulation port 28 side simultaneously with the heating.

The carrier gas passes through the inside of the pipe body 2 through the flow port 28 and is discharged from the inside of the pipe body 2 to the outside of the pipe body 2 through the flow port 27. The specific component in the gas sample that has been adsorbed by the adsorbent 24 in the tube 10 is desorbed from the adsorbent 24 by heating and sent to the analyzer together with the carrier gas. This desorbed specific component is analyzed by gas chromatography.

As described above, since the gas component adsorption tube 10 is provided with the lid members 3 and 4 and the opening and closing of the respective flow ports 27 and 28 of the tube main body 2 can be freely opened and closed, like the conventional gas component adsorption tube cap. In addition, it is not necessary to perform the work of removing and attaching for each work, so that the complexity of such work can be eliminated, and the workability can be improved.

In each of the washing, adsorption, and desorption steps, each device required for each of these steps is a gas component adsorption tube 10.
Opening and closing operations of the lid members 3 and 4 are performed while being connected to the respective ends of the gas component adsorption tube 10 without exposing the respective circulation ports 27 and 28 of the tube body 2 to the outside air. During the period from the washing to the desorption operation, the adsorption of the impurity component of the outside air to the adsorbent 24 is effectively eliminated, thereby effectively suppressing the influence of the impurity component in the analysis of the specific component, and improving the accuracy of the analysis. It is possible to improve.

Also, since each of the lid members 3 and 4 has a cylindrical shape with a bottom, each of the flow ports 2 is rotated with respect to the tubular pipe body 2 by a rotating operation.
Since the open / close states of the switches 7 and 28 can be switched, the open / close operation can be performed more easily and quickly, and the workability can be further improved.

Further, since both the tube main body and the switching means are cylindrical, and the entire gas component adsorption tube 10 has the same outer diameter as the conventional gas component adsorption tube, it is used for this conventional gas component adsorption tube. The desorption device and each device used for washing and adsorption can be used as they are.
In each of these devices, even if both ends of the gas component adsorption tube 10 are fixed and mounted, the fixed lid members 3, 4
It is possible to freely switch between opening and closing by rotating the tube body with respect to the gas component adsorption tube 10.
Can effectively correspond to each of these devices.

Although the gas component adsorption tube 10 of the present embodiment is provided with the lid members 3 and 4 detachably, it is not always necessary to be detachable.

Further, as shown in FIG.
In addition, on the outer peripheral surface of the pipe main body 2, a mark such as a marking for positioning each of the through-holes 32 and 42 in the opening / closing operation may be provided. That is, the lid members 3 and 4 have the engraved marks 33 on the open end sides (ends opposite to the sliding end faces 31 and 41) in the same direction as the radial direction from the central axis toward the through holes 32 and 42. , 43 are formed.

On the other hand, the end corresponding to each of the lid members 3 and 4 on the outer peripheral surface of the intermediate portion 23 of the pipe main body 2 has a radial direction from its central axis toward the flow ports 27 and 28 and 180 [゜].
Marks 29A and 29B are provided in opposite directions.

Thus, as shown in FIG. 5A, when the inscription 33 and the inscription 29A are located at the same position,
When the circulation port 27 and the through-hole 32 are in a closed state where they do not overlap at all, and when the inscription 43 and the inscription 29B are at the same position, the circulation port 28 and the through-hole 42 are in a closed state where they do not overlap at all. .

Similarly, as shown in FIG. 5B, when the inscription 33 and the inscription 29A are located at the opposite positions with respect to the center axis, the communication port 27 and the through-hole 32 are connected. It will be in the open state where it overlaps, and also engraved 43 and engraved 29B
Are located opposite to each other across the central axis,
The open state where the circulation port 28 and the through-hole 42 overlap each other.

By these markings, the gas component adsorption tube 10
Is formed of an opaque material.
The open / closed state of the cover members can be seen at a glance from the outside.
It is possible to eliminate erroneous operation such as erroneous opening / closing position of, and improve operability.

Each of the circulation ports 27 and 28 and each through-hole 3
The positional relationship between 2, 2 and each of the inscriptions 29A, 29B, 33, 43 is not limited to the above, and any location recognizable from outside of the intermediate portion 23 of each tube main body 2 and each of the lid members 3, 4 is not limited thereto. May be provided in each distribution port 2 as described above.
It is desirable to have a clear positional relationship with 7, 28 and each through-hole 32, 42.

Reference numeral 29C shown in FIG. 5 is an operation concave portion. The operation concave portion 29C is a depression formed on the outer peripheral surface of the intermediate portion 23 of the pipe main body 2, and when the pipe main body 2 is rotated with respect to each of the lid members 3 and 4, the operation concave portion 29C is formed. The operation is performed with a finger, and operability such as slip prevention is improved.

The operation concave portion may be formed on the outer peripheral surface of the lid members 3 and 4, or may be formed at any position on the outer peripheral surface of each member. Further, FIG.
In the above, a concave shape is used, but an operation convex portion protruding from the outer peripheral surface may be provided. However, since the gas component adsorption tube 10 is attached to various devices in each step, a concave portion is more preferable than a convex portion.

Further, as shown in FIG. 6, the gas component adsorption tube 10 may be provided with a stopper 5 for preventing a displacement of the adsorbent 24 inside the tube main body 2. This stopper 5
Is a thin rod-shaped member, which is inserted into the tube main body 2 through an insertion hole 22a formed near the intermediate portion 23 on the outer peripheral surface 22A of the other end portion 22 of the tube main body 2. The stopper 5 has a length such that the distal end thereof is in contact with the inner peripheral surface of the tube main body 2 and the other end is inserted into the insertion hole 22a, and the other end does not protrude from the outer peripheral surface 22A. Is set.

The stopper 5 prevents the adsorbent 24 and the glass wool 24A from moving toward the stopper 5 inside the pipe body 2, thereby preventing the adsorbent 24 and the glass wool 24A from being displaced. I have. That is, the stopper 5 eliminates the need to form a small-diameter portion inside the tube as in the related art.

The insertion hole 22a provided in the pipe body 2
The effect of airtightness of the gas component adsorption tube 10 due to
The problem is solved by being covered with the lid member 4 from the outside of the insertion hole 22a. Further, the outer diameter of the stopper 5 may be set somewhat tighter with respect to the insertion hole 22a, so that the sealing performance may be further improved.

The stopper 5 may be provided with a plurality of through holes in the vicinity of the intermediate portion 23 on the outer peripheral surface 22A of the other end portion 22, and a plurality of stopper holes may be provided. The stopper 5 has an outer peripheral surface 21 at one end 21 of the pipe body 2.
A new insertion hole may be formed in the vicinity of the intermediate portion 23 on A, and may be inserted here. Thereby, the adsorbent 2
4 can be prevented from shifting toward one end.

[0063]

According to the first aspect of the present invention, since the opening and closing means are provided at each end of the pipe main body, each end of the pipe main body can be freely opened and closed by switching the opening and closing means. As in the case of the gas component adsorption tube cap described above, it is not necessary to perform the work of removing and attaching for each work, so that the complexity of such work can be eliminated and the workability can be improved.

Further, by the opening and closing means, as in the prior art,
The above attachment and detachment work prevents each end of the gas component adsorption tube from being exposed to the outside air, and prevents the outside air from flowing into the gas component adsorption tube's adsorbent during the period from the cleaning of the gas component adsorption tube to the analysis operation. Effectively eliminates the adsorption of impurity components and the outflow of specific components adsorbed by the adsorbent, thereby effectively suppressing the effects of impurity components in the analysis of specific components and improving the accuracy of analysis. It is.

The invention according to claim 2 has the same effect as the invention according to claim 1, and furthermore, the pipe main body is formed in a cylindrical shape, and each end thereof is freely movable in a direction along the peripheral surface of the pipe main body. Since the opening / closing means which rotates is provided, the opening / closing operation of each end of the pipe main body can be easily and quickly performed by the rotating operation, and the workability can be further improved.

Further, the opening and closing of each flow port is always performed by sliding the sliding end face which is in contact with the end face provided with the flow port, so that a gap which causes intrusion of outside air or leakage of adsorbed components occurs. It is difficult, and it is possible to effectively suppress the influence of the leakage of the impurity component or the specific component in the analysis of the specific component, and to further improve the analysis accuracy.

Further, since both the tube main body and the switching means are cylindrical, the entire gas component adsorption tube has a cylindrical shape, and the outer diameter of the conventional gas component adsorption tube is made equal to that of the conventional gas component adsorption tube. The desorption device used for the gas component adsorption tube and each device used for washing and adsorption can be used as it is. In each of these devices, even if both ends of the gas component adsorption tube are fixed and mounted, it is possible to freely switch between opening and closing by rotating the tube body with respect to each fixed switching means. Therefore, the present invention can effectively deal with each device.

As described above, according to the present invention, it is possible to provide an unprecedented excellent gas component adsorption tube storage container.

[Brief description of the drawings]

FIG. 1 shows a gas component adsorption tube according to an embodiment of the present invention, FIG. 1 (A) shows an overall view thereof, and FIG. 1 (B) shows an exploded view thereof.

FIG. 2 is an explanatory diagram showing a positional relationship between a flow port and a through port of a gas component adsorption tube, where FIG. 2 (A) shows a closed state of the flow port and FIG. 2 (B) shows an open state. I have.

FIG. 3 is an explanatory view showing another flow port and a through port having different shapes of the gas component adsorption tube. FIG. 3 (A) shows a closed state of the flow port, and FIG. 3 (B) shows an open state. ing.

4A and 4B are explanatory diagrams of the operation of the gas component adsorption tube shown in FIG. 1, wherein FIG. 4A shows a storage state of the gas component adsorption tube, and FIG. , FIG. 4 (C)
Shows the time of adsorption, and FIG. 4D shows the time of desorption.

5 is an exploded explanatory view showing an example in which positioning marks are provided on the pipe main body and the lid member of the gas component adsorption tube shown in FIG. 1, and FIG. 5 (A) shows the positions of the marks in a closed state; FIG. 5B shows the position of the mark in the open state.

FIG. 6 is an explanatory view showing an example in which a stopper of an adsorbent is provided on the pipe main body of the gas component adsorption pipe shown in FIG. 1, and FIG.
Indicates a mounting position of the stopper, and FIG. 6B illustrates a mounting state of the stopper.

FIG. 7 is a cross-sectional view showing a conventional gas component adsorption tube, FIG. 7 (A) is an example thereof, and FIG. 7 (B) is another example in which a small diameter portion is provided.

[Explanation of symbols]

 2 Tube body 3, 4 Lid member (opening / closing means) 10 Gas component adsorption tube 21 One end 21A Outer peripheral surface (peripheral surface) 22 Other end 22A Outer peripheral surface (peripheral surface) 23 Intermediate part 24 Adsorbent 25, 26 End surface 27, 28 Distribution port 31, 41 Sliding end face 32, 42 Through port

Claims (2)

[Claims] 1. A tubular tube body through which a gas sample can freely pass from one end to the other end, an adsorbent sealed inside an intermediate portion of the tube body and adsorbing a specific component in the gas sample. A gas component adsorption tube comprising: a gas component adsorption tube provided with an opening / closing means for freely switching between an open state and a closed state of each end at each end of the tube main body. 2. The pipe body is formed in a cylindrical shape, each end of which is closed with an end face perpendicular to the longitudinal direction of the pipe body, and a flow through each end face penetrating into the inside of the pipe body. A mouth is formed, and each of the opening / closing means is freely rotated in a direction along the peripheral surface of the pipe main body, and is formed in a bottomed cylindrical shape having a sliding end surface in contact with the end surface. The gas component adsorption pipe according to claim 1, wherein a through-hole is provided so as to overlap with each of the flow ports by rotation of the lid member.