JPH0321473Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas sampler for collecting a trace amount of gas such as air from within an ampoule of an injection drug.

In order to collect a small amount of gas to be detected (sampling gas) such as air in an ampoule and measure residual oxygen, for example, a body is provided with ports (holes) for intake and/or exhaust, and a A gas sampler is used, which is comprised of a socket that is slidably fitted in the rotational direction and selectively connects ports. However, with conventional gas samplers, the air present in the gas sampler flow path was not exhausted, which resulted in inaccurate measurements such as slightly higher residual oxygen values in the sampled gas due to the influence of this air. . Also, when the amount of sampling gas is large, accurate measurements can be made by flowing the sampling gas into the gas sampler and excluding air, but when the amount of sampling gas is small, it is impossible to clean the inside of the gas sampler with the sampling gas. .

The purpose of this invention is to clean the inside of the gas sampler with a cleaning gas with specified components, such as nitrogen gas, so that the concentration of a specific gas in a trace amount of gas that has entered an ampoule, etc. can be determined by the influence of the air inside the gas sampler. To provide a gas sampler that can be measured with a gas measuring device without being subjected to

The gas sampler of the present invention has a body in which first to fourth ports are formed in order to communicate a cavity with a sample gas flow path, a cleaning gas supply source, a suction pump, and a gas measuring device, and a body that rotates and The cleaning gas is fitted into the cavity so as to be freely displaceable in the axial direction, and communicates with the second port and the third port when in a first setting position where cleaning gas is sucked by the suction pump, thereby sucking the cleaning gas. At the second setting position, the gas measuring instrument and sampled gas flow path are cleaned with gas; At the third setting position, the first, second, and third ports are communicated and the sample gas is aspirated. When the first port and the third port are in communication with each other and the sample gas is sent to the gas measuring device, the third port is in the fourth setting position.
and a lever that displaces the socket in the axial direction when changing the socket from the second setting position to the third setting position. .

Next, a gas sampler according to the present invention will be explained based on an embodiment shown in the drawings.

Reference numeral 1 denotes a gas sampler, which is composed of a gas sampler body 2 and a socket 3 fitted into the body 2 so as to be slidable in the rotational direction.

The body 2 of the gas sampler has a port 3 A formed in a central portion 31C fitted into the body 2 so as to be slidable in the rotational direction as shown in FIGS. 1, 2 and 3.
2A, B ports 32B, C ports 32C, and D ports 32D.
2A to 32D, a first port 21A for inhaling and discharging sampling gas, a second port 21B for inhaling cleaning gas, a third port 21C connected to a pump, and an oxygen sensor 24.
The first port 21A and the second port 21B communicate with a sampling gas injection needle 51 and a cleaning gas injection needle 61, which will be described later. port 21B, third port 21C, and fourth port 21B.
At the tip of the port 21D, there is a concave sampling gas inlet chamber 22A formed integrally with the body 2;
It has a cleaning gas injection device chamber 22B, a pump cylinder chamber 22C, and a sensor screw hole 22D, and the sampling gas injection device chamber 22A and the cleaning gas injection device chamber 2.
The cylinder chamber 22C has screws 23A and 23 on the outer peripheral surface, respectively.
B, 23D, and 23C are formed. Furthermore, second, third, and
The fixing member 32 shown in FIGS. 4, 5, and 6, and the sliding groove 41B having a lever sliding groove 41A, a lever support part 43A on the protruding side, and a lever support part 43B on the cock side as shown in FIGS. 7 and 8, and a protruding part. A lever 47 for selectively setting the lever 3 protruding from the fixing member 32 on which a lever guide band 42 having a sliding groove 41C having a lever support portion 43C on the side and a lever protrusion 43D on the lever side is fitted; 3 is provided with an arm 48 that starts from the outer periphery, protrudes from the tip of the pot in the circumferential direction, and rotates the pot 3, and by operating the lever 47 and the arm 48, the A port 32A, the B port 32B, C
The ports 32C and 32D of D are selectively connected to the first port 21A and the second port 21.
B, a third port 21C, and a switching device 4 communicated with a fourth port 21D.

As shown in FIGS. 1, 2, and 6, the sampling gas injection tool 5 has a sampling gas injection needle 51 that penetrates from the bottom and protrudes. An annular member 53 that communicates with the small diameter sampling gas pipe 52 connected to the portion 59A and has the injection needle 51, a support ring 54 that supports and fastens the member 53, and a distal end side 53A of the member 53. Including the fitted lid member 55 and the injection needle 51 from the tip of the large diameter portion 56A.
protrudes, and the screw 23A is attached to the outer periphery of the small diameter portion 56B.
It consists of a sampling gas injector lid 58 forming a thread 57 which is threadedly engaged with the sampling gas injector lid 58.

The cleaning gas injection device 6, such as nitrogen gas, has first and second
As shown in the figure, there is a cleaning gas injection needle 61 in the center, the tip of the injection needle 61 communicates with a cleaning gas pipe 62 from a gas cylinder 69, and an annular member 63 having the injection needle 61; The member 63
a support ring 64 that supports and fastens the member 63;
The injection needle 61 protrudes from the tip of the large diameter portion 66A, and the screw 2 is attached to the outer periphery of the small diameter portion 66B.
It consists of a cleaning gas injector lid 68 forming a screw 67 that is screwed into 3B.

The pump 7 has a piston 71 as shown in FIGS.
and a cylinder part 72, the cylinder part 72 has a lid 73 penetrated by the piston 71 at the piston side end 72A, and the other part is fitted into the sensor screw hole 22D and protrudes outward from the cylinder wall 74, and the outer peripheral end 7
The guide 75 of the cylinder wall connected from 4A in the direction of the cylinder wall 74 has the screw 23C on the inner peripheral part 76.
A screw 76A is formed to be screwed together.

The operation of this embodiment will be explained.

A 9th hole is placed in the sliding groove 41B of the lever 47 in FIG.
When the lever 47 is positioned on the fixed part side 44A of the fixed part groove 46A shown in the figure and the lever support part 43A on the protruding side of the lever guide band 42, the second port 21B and the third port 2 are located as shown in FIG.
1C is in communication, and at this time, when the piston 71 shown in FIG. 1 is pulled to the right in the figure, the cylinder chamber 22C
Nitrogen gas, which is a cleaning gas, enters from the gas cylinder 69 through the cleaning gas pipe 62.

(b) Next, as shown in FIG. 8, when the lever 3 is rotated by the arm 48, the lever 47 is moved to the position of the lever support portion 43B on the lever side. 1st
As shown in FIG. 1, the third port 21C communicates with the first port 21A and the fourth port 21D, and when the piston 71 is pushed at this time, the inside of the sampling gas flow path is cleaned by the cleaning gas. , the oxygen concentration in the sampling gas flow path becomes approximately 0%.

C Next, move the lever 47 from the fixed part side 44A to the protruding part side 44B as shown in FIGS. 9 and 12, and move the lever 47 for rotating the pot 3 by the arm 48 to the pot side shown in FIG. 8 of the groove 41C. When located on the lever support part 43C of
As shown in Fig. 13, the first port 21A and the third port
and the port 21C. At this time, the sampling gas pipe 52 is inserted into the air retention section 59A which is the sampling gas in the ampoule 59, and the piston 71 is pulled, thereby causing the air in the ampoule 59 to stay in the third port 21C.

D. Next, when the arm 48 rotates the lever 47 to position the lever 47 on the lever support portion 43D on the protrusion side as shown in FIG. Only the fourth port 21D is communicated with the fourth port 21D, air is introduced into the sensor screw hole 22D, and the oxygen concentration is measured by the oxygen sensor 24.

The present invention has the following effects.

(a) Since the entire inside of the gas sampler can be cleaned with cleaning gas, the concentration of a specific gas in a trace amount of gas that has entered an ampoule, etc. can be measured with a gas measuring instrument without being affected by the air inside the gas sampler. .

(a) When moving the pot from the second setting position to the third setting position, the pot is displaced in the axial direction by a lever, so ports other than the predetermined ports are not communicated. Also, you only need one kettle.

(c) When moving from the second set position to the third set position, the lever is configured to displace the tip in the axial direction, so the sample can be sampled from cleaning the flow path with cleaning gas without causing any operational errors. You can move on to gas measurement.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional view of the gas sampler according to the present invention, Fig. 2 is a bottom view of the gas sampler according to the present invention, Fig. 3 is a left side cross-sectional view of the gas sampler according to the present invention, and Fig. 4 is a main view of the gas sampler according to the present invention. FIG. 5 is a sectional view of the groove in the gas sampler according to the invention in FIG. 3, FIG. 6 is a sectional view of the groove in FIG. 3 of the gas sampler in accordance with the invention, and FIG. A side view of the gas sampler according to the present invention, Fig. 8 is a developed view of the lever guide band of the gas sampler according to the present invention, and Figs. It is an action explanatory diagram. In the figure, 1... gas sampler, 2... body,
3...Kottoku, 5...Sampling gas injection tool,
6... Cleaning gas injector, 21A... First port, 21B... Second port, 21C... Third port, 21D... Fourth port.

Claims (1)

[Scope of Claim for Utility Model Registration] A body in which first to fourth ports are formed in order to communicate the void space with a sample gas flow path, a cleaning gas supply source, a suction pump, and a gas measuring device, and a rotating body. and is fitted into the cavity so as to be freely displaceable in the axial direction, and when in a first set position where the cleaning gas is sucked by the suction pump, the second port and the third port are communicated, and the cleaning gas is sucked. When the second set position is for cleaning the gas measuring instrument and the sampled gas flow path with the sample gas, the third set position is for communicating the first, second, and third ports and sucking the sample gas. A fourth port communicates the first port and the third port and sends the sample gas to the gas measuring device.
a socket forming a port that communicates the third port and the fourth port when the socket is in the set position; and when the socket is moved from the second setting position to the third setting position, the socket is displaced in the axial direction. A gas sampler equipped with a lever to