JP2002296174A - Measuring cell for spectrometry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring cell for spectrometry to improve maintenance property by detecting the state leaking from a window part of a seal structure disposed in a tubular passage flowing a sample. SOLUTION: The measuring cell for spectrometry has the tubular passage capable of flowing a fluid to be measured, a pair of window parts with seal structure which is in the position facing this tubular passage and transmits light into the tube, an illumination means provided with a lens illuminating light to one window part, and a light receiving means provided with a lens receiving the light emitted from one window part to the other window part. It is constituted by disposing a storage part capable of connecting a drain to the light path between the window part and the lens, and of storing the fluid to be measured leaking from the seal part of the window part through this drain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement cell for spectroscopic analysis in spectroscopic measurement, and more particularly, to a fluid to be leaked from a sealing structure of a window member for irradiating and receiving near-infrared rays to a fluid to be measured which is bypassed. In addition, the present invention relates to a measurement cell for spectroscopic analysis that has a function of quickly detecting the leakage to improve maintainability of a seal portion.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional measuring cell for spectroscopic analysis is provided with a pipe 1 for flowing a sample of a fluid to be measured at a substantially central position of a substantially rectangular casing. 1 is a substantially intermediate position, and has a structure in which a pair of windows 2a and 2b formed of a transparent member are provided at opposing portions.

The window 2a has an optical path 4a sealed by a sealing member 3a such as an O-ring.
The structure has an irradiating section 6a provided with a lens 5a at the end of "a".

The other window 2b has an optical path 4b sealed by a sealing member 3b such as an O-ring, and a light receiving section 6b having a lens 5b at an end of the optical path 4b. The irradiating section 6a and the light receiving section 6b have a structure in which an optical fiber (not shown) can be inserted and mounted.

In the measuring cell for spectroscopic analysis having such a structure, the measuring light having passed through the optical fiber passes through the lens 5 a and the window 2.
a, passing through the transparent member, and irradiating the sample of the fluid to be measured, and receiving the light beam transmitted through the sample by the light receiving unit 6b;
The spectrum of the sample is measured by a measuring unit (not shown) via the optical fiber.

The transparent members of the windows 2a and 2b have a sealing structure of sealing members 3a and 3b so that the sample does not leak out, and generally an O-ring or the like is used. If the O-ring or the like of the seal structure is deteriorated, the sample leaks out, and the leaked fluid accumulates between the lenses 5a and 5b and the windows 2a and 2b, so that accurate measurement cannot be performed.
In addition, since the sample may be dangerous if leaked to the outside, the O-ring needs to be replaced periodically before it deteriorates.

[0007]

However, in the above-described conventional measuring cell for spectroscopic analysis, the degree of deterioration of the O-ring and the like used in the seal structure is different from the logic on the desk, and the material of the O-ring is different. The seal structure, the substance of the fluid to be measured, the environment in which the measurement cell is placed, and the like are interrelated, and the state of deterioration (aging) becomes earlier or later. For this reason, there is a problem that it is necessary to always monitor the state of deterioration in addition to the regular maintenance.

Further, by replacing the O-ring or the like constituting the seal structure as soon as possible, a certain effect can be obtained, but the work time required for the maintenance is correspondingly increased. On the other hand, in the case of regular replacement that is set in advance, there is a case where the battery deteriorates and leaks before the period comes. In that case, the leakage phenomenon appears on the surface and it can be discovered that it is leaking for the first time,
There is also the problem of delaying the response.

Therefore, the conventional sealing structure has a problem that must be solved by a structure that can be detected before the leakage state appears outside and a structure that can detect the leakage phenomenon early by visual recognition or the like. .

[0010]

Means for Solving the Problems To solve the above problems, a measuring cell for spectroscopic analysis according to the present invention has the following configuration.

(1) A pipe through which a fluid to be measured can flow, a pair of windows having a seal structure at a position facing the pipe and transmitting light into the pipe, and a light beam through one of the windows. Irradiating means having a lens for irradiating, a measuring cell for spectral analysis having a light receiving means having a lens for receiving a light beam emitted from one window portion to the other window portion, wherein the window portion and the A measurement cell for spectroscopic analysis, comprising a drain connected to an optical path between the lens and a storage part capable of storing a fluid to be measured leaking from a sealing portion of a window through the drain. (2) The measuring cell for spectroscopic analysis according to (1), wherein the storage section is provided with a reaction means for reacting with the fluid to be measured. (3) The measurement cell for spectroscopic analysis according to (2), wherein the reaction means is a reaction using a reaction solution or a reaction paper.

As described above, the provision of the storage portion for storing the fluid to be measured leaking from the window portion of the seal structure allows the phenomenon of leakage from the window portion to be determined by the size of the leakage by looking at the storage portion. Will be discoverable.

Further, by reacting the leakage phenomenon with the reaction means, it is possible to detect the degree of leakage even at a small amount at an early stage.

[0014]

Next, an embodiment of a measuring cell for spectroscopic analysis according to the present invention will be described with reference to the drawings.
The same components as those described in the related art will be described with the same reference numerals.

In the measuring cell for spectroscopic analysis of the present invention, as shown in FIG. 1, a pipe 1 for flowing a sample of a fluid to be measured is provided at a substantially central position of a substantially rectangular casing.
And a pair of windows 2a and 2b formed of a transparent member at opposing portions.

The window 2a has a sealing member 3a for sealing with an O-ring or the like and an optical path 4a.
a irradiating unit 6 which is a irradiating unit having a lens 5a at an end of a
a.

A drain (discharge pipe) 7a is connected to the optical path 4a of the irradiating section 6a, and a storage section 8a for storing a leaked fluid of a sample, which is a constant fluid to be measured, is provided at an end of the drain 7a. It has a structure with. A reaction liquid or a reaction paper is inserted into the storage section 8a, and even if a small amount of leakage is caused to react with the reaction liquid or the reaction paper, the leakage state can be visually detected early. In addition, since the leak state does not leak to the outside, even if it leaks, the safety is ensured.

The other window 2b has a light path 4b sealed by a sealing member 3b such as an O-ring, and has a light receiving section 6b as a light receiving means having a lens 5b at an end of the light path 4b. I have.

A drain (discharge pipe) 7b is similarly connected to the optical path 4b of the light receiving section 6b, and a storage section for storing a leaked fluid of a sample which is a constant fluid to be measured is provided at an end of the drain 7b. 8b. A reaction liquid or a reaction paper is also inserted into the storage section 8b,
Even if a small amount of leakage occurs, the state of leakage can be visually detected early by reacting the reaction solution or the reaction paper. Further, since the leak state does not leak to the outside, safety can be ensured even if it leaks.

The irradiating portion 6a and the light receiving portion 6b have a structure in which an optical fiber (not shown) can be inserted and mounted.

In the measuring cell for spectroscopic analysis having such a structure, the measuring light passing through the optical fiber is transmitted through the lens 5 a and the window 2.
a, passing through the transparent member, and irradiating the sample of the fluid to be measured, and receiving the light beam transmitted through the sample by the light receiving unit 6b;
The spectrum of the sample is measured by a measuring unit (not shown) via the optical fiber.

At the same time, the sealing members 3 of the windows 2a, 2b
The leakage of the sample from the portions a, 3b is caused by the storage portion 8a,
8b, the state of leakage can be visually detected. Therefore, when the maintenance is performed, the state of the leakage can be seen, so that the seal members 3a, 3a
It is possible to rationally calculate the replacement time of the O-ring and the like and calculate the replacement time periodically.

[0023]

As described above, in the measuring cell for spectroscopic analysis according to the present invention, the drain is provided in the optical path between the sealing structure of the window and the lens, and the storage is provided in front of the drain. Therefore, when the sample leaks from the seal portion, the sample leaked to the storage portion via the drain is accumulated, so that the leaked state can be detected in a state where it does not leak to the outside, and maintenance can be improved. effective.

In addition, by inserting a reaction solution or a reaction paper into the storage section, it is possible to detect or detect a leak state at an early stage by reacting to a minute leak of the sample and to carry out or plan an early maintenance work. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a spectroscopic measurement cell according to the present invention.

FIG. 2 is a schematic configuration diagram of a measuring cell for spectroscopic analysis in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 2a, 2b Window part 3a, 3b Sealing member 4a, 4b Optical path 5a, 5b Lens 6a Irradiation part 6b Light receiving part 7a, 7b Drain 8a, 8b Storage part

Claims (3)

[Claims] 1. A pipe through which a fluid to be measured can flow, a pair of windows having a seal structure at a position opposite to the pipe and transmitting light into the pipe, and one of the windows is irradiated with a light beam. A measuring cell for spectroscopic analysis, comprising: an irradiating unit having a lens to perform light irradiation, and a light receiving unit having a lens for receiving a light beam emitted from one window portion to the other window portion, wherein the window portion and the lens are provided. A drain connected to the optical path between the liquid crystal and a storage part capable of storing the fluid to be measured leaking from the sealing portion of the window through the drain. 2. The measurement cell for spectroscopic analysis according to claim 1, wherein said storage section is provided with a reaction means for reacting with the fluid to be measured. 3. The measuring cell for spectroscopic analysis according to claim 2, wherein said reaction means is a reaction using a reaction solution or a reaction paper.