JP2000171392A - Measurement probe for spectral analysis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement probe for spectral analysis capable of improving the environment resistance and safety. SOLUTION: This measurement probe for spectral analysis having an optical fiber connection port provided in a measurement probe body includes an air-tight cover for air-tightly covering the optical fiber connection port, and an air-tight cover internal pressure monitoring valve which is provided in the air-tight cover and opened to the air when the internal pressure in the air-tight cover reaches a designated pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring probe for spectroscopic analysis in spectroscopic measurement, and more particularly to a measuring probe for spectroscopic analysis capable of improving environmental resistance and safety.

[0002]

2. Description of the Related Art FIG. 2 is an explanatory view of the structure of a conventional example generally used conventionally, and FIG. 3 is a side view of FIG. In the figure, the optical fiber connection port 2 is
At one end.

The optical fiber 3 of the measuring probe is provided inside the measuring probe, and one end is connected to the optical fiber connection port 2 and the other end is connected to the measuring sensor portion 4 at the other end of the measuring probe body 1.

As shown in FIG. 3, a measurement fluid passage 5 through which the measurement fluid FLo passes is provided in the measurement sensor portion 4 at the other end of the measurement probe body 1. In this case, the measurement fluid passage 5 has a slit shape having a rectangular cross section.

A mirror section 6 is provided at the other end of the measuring probe body 1. On both sides of the measurement fluid passage 5, measurement windows 7 made of glass are provided.

In the above configuration, the transmitted measurement light A is guided to the measurement sensor portion 4 through the light guide and the optical fiber 3 inside the measurement probe by the optical fiber connected to the optical fiber connection port 2, and At 4, the light is absorbed by the measurement fluid FLo.

[0007] The measurement light A that has been absorbed by the measurement fluid FLo is reflected by the mirror 6 and returns to the optical fiber connection port 2. In the spectroscopic analysis, a component, a property value unique to the measurement fluid FLo, and the like are analyzed by analyzing a light absorption spectrum of the measurement fluid FLo.

[0008]

However, such an apparatus has a structure in which the optical fiber connection port 2 is exposed. In many cases, the measuring probe for spectroscopic analysis is directly installed in a reaction tank on the site, a distribution line of raw materials and products, and performs online measurement in an actual process.

However, since the optical fiber connection port 2 is exposed, if it is exposed to wind and rain, rainwater or the like intrudes into the interior of the optical fiber connection port 2, so that it cannot be installed outdoors. When installing outdoors, it is conceivable to cover that part with an airtight cover.

However, in this case, if a leak occurs in the sealing structure of the measurement window 7 of the measurement sensor unit 4, the measurement fluid FL
may flow into the airtight cover, and the pressure inside the airtight cover may increase to the pressure of the measurement fluid FLo.

Therefore, when the airtight cover is opened and closed at the time of maintenance or the like, there is a danger that an operator may be injured.

The present invention solves the above problems. An object of the present invention is to provide a spectroscopic measurement probe capable of improving environmental resistance and safety.

[0013]

In order to achieve the above object, according to the present invention, there is provided a measuring probe for spectroscopic analysis according to claim 1, wherein the spectroscopic spectrometer comprises an optical fiber connection port provided in the measuring probe main body. In the analysis measurement probe, an airtight cover that airtightly covers the optical fiber connection port, an airtight cover internal pressure monitoring valve that is provided in the airtight cover and that is opened to the atmosphere when the internal pressure inside the airtight cover reaches a predetermined pressure. It is characterized by having.

As a result, (1) by covering the optical fiber connection port with an airtight cover,
It is possible to obtain a spectroscopic measurement probe that can prevent rainwater from entering the inside of the spectroscopic measurement probe and can be directly attached to a reaction tank or the like of an outdoor plant. (2) By installing the airtight cover internal pressure monitoring valve on the airtight cover, even if the sealing structure of the measuring section leaks, if the internal pressure of the airtight cover becomes higher than a preset pressure, the airtight cover internal pressure monitoring valve is activated. When the airtight cover is opened, the internal air and the leaked measurement fluid can be discharged to the outside and the pressure inside the airtight cover can be reduced, so that the pressure inside the airtight cover does not reach dangerous pressure, ensuring safety. Thus, a measurement probe for spectroscopic analysis can be obtained.

According to a second aspect of the present invention, in the measurement probe for spectroscopic analysis according to the first aspect, an airtight cover made of an aluminum material is used as the airtight cover.

As a result, since the airtight cover made of aluminum is used as the airtight cover, a lightweight and inexpensive measuring probe for spectroscopic analysis can be obtained.

According to a third aspect of the present invention, in the measuring probe for spectroscopic analysis according to the first or second aspect,
A check valve is used as the airtight cover internal pressure monitoring valve.

As a result, since the check valve is used as the airtight cover internal pressure monitoring valve, the check valve has marketability and can be obtained at low cost, so that an inexpensive measuring probe for spectroscopic analysis can be obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention. In the figure, the configuration of the same symbol as FIG. 2 represents the same function. Hereinafter, only differences from FIG. 2 will be described.

In the figure, an airtight cover 11 airtightly covers the optical fiber connection port 2. In this case, an airtight cover made of an aluminum material is used as the airtight cover 11.

The hermetic cover internal pressure monitoring valve 12 is provided on the hermetic cover 11, and the internal pressure of the hermetic cover 11 is
When the pressure reaches a predetermined value, the valve is opened to the atmosphere.
In this case, a check valve is used as the airtight cover internal pressure monitoring valve 12.

In the above configuration, after the optical fiber is attached to the optical fiber connection port 2, the airtight cover 11 is attached. The airtight cover 11 is kept airtight by an O-ring 21 and a cable gland 22 at an optical fiber inlet. Further, an airtight cover internal pressure monitoring valve 12 is attached to the airtight cover 11.

As a result, (1) an airtight cover 11 that covers the optical fiber connection port 2 in an airtight manner, and the airtight cover 11 is provided in the airtight cover 11, and is opened to the atmosphere when the internal pressure of the airtight cover 11 reaches a predetermined pressure. The airtight cover internal pressure monitoring valve 12 is provided.

Therefore, by covering the optical fiber connection port 2 with the airtight cover 11, it is possible to prevent rainwater from entering the inside of the measurement probe for spectroscopic analysis, and the spectrometer can be directly attached to a reaction tank or the like of an outdoor plant. An analytical measurement probe is obtained. By mounting the airtight cover internal pressure monitoring valve 12 on the airtight cover 11, even if a leak occurs in the sealing structure of the measuring section, if the pressure inside the airtight cover 11 becomes higher than a preset pressure, the airtight cover internal pressure monitoring valve 12 Is opened, the internal air and the leaked measurement fluid FLo can be discharged to the outside, and the pressure inside the airtight cover 11 can be reduced. The measurement probe for spectroscopic analysis which ensures the property is obtained. (2) Since the airtight cover 11 made of aluminum is used as the airtight cover 11, a lightweight and inexpensive measurement probe for spectroscopic analysis can be obtained. (3) Since a check valve is used as the airtight cover internal pressure monitoring valve 12, the check valve has marketability and can be obtained at low cost, so that an inexpensive measurement probe for spectroscopic analysis can be obtained.

It should be noted that the foregoing description has been directed to specific preferred embodiments for the purpose of illustration and illustration of the invention. Therefore, the present invention is not limited to the above-described embodiments, and includes many more modifications without departing from the spirit thereof.
This includes deformation.

[0026]

As described above, according to the first aspect of the present invention,
According to the above, the following effects are obtained. An airtight cover that covers the optical fiber connection port in an airtight manner, and an airtight cover internal pressure monitoring valve that is provided on the airtight cover and that opens to the atmosphere when the internal pressure of the airtight cover reaches a predetermined pressure are provided.

Therefore, (1) by covering the optical fiber connection port with an airtight cover,
It is possible to obtain a spectroscopic measurement probe that can prevent rainwater from entering the inside of the spectroscopic measurement probe and can be directly attached to a reaction tank or the like of an outdoor plant. (2) By mounting the airtight cover internal pressure monitoring valve on the airtight cover, even if the sealing structure of the measuring section leaks, if the pressure inside the airtight cover becomes higher than a preset pressure, the airtight cover internal pressure monitoring valve is activated. When the airtight cover is opened, the air inside and the leaked measurement fluid can be discharged to the outside and the pressure inside the airtight cover can be reduced, so that the pressure inside the airtight cover does not reach dangerous pressure, ensuring safety. Thus, a measurement probe for spectroscopic analysis can be obtained.

According to the second aspect of the present invention, the following effects can be obtained. Since an airtight cover made of an aluminum material was used as the airtight cover, a lightweight and inexpensive measurement probe for spectroscopic analysis can be obtained.

According to the third aspect of the present invention, the following effects can be obtained. Since a check valve is used as a valve for monitoring the internal pressure of the airtight cover, the check valve has marketability and can be obtained at low cost, so that an inexpensive measurement probe for spectroscopic analysis can be obtained.

Therefore, according to the present invention, it is possible to realize a spectroscopic measurement probe capable of improving environmental resistance and safety.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is an explanatory view of a configuration of a main part of a conventional example generally used in the related art.

FIG. 3 is a side view of a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measurement probe main body 2 Optical fiber connection port 3 Optical fiber 4 Measurement sensor part 5 Measurement fluid passage 6 Mirror part 7 Measurement window part 11 Airtight cover 12 Airtight cover internal pressure monitoring valve 21 O-ring 22 Cable gland A Measurement light FLo Measurement fluid

Claims (3)

[Claims] 1. A spectroscopic measurement probe having an optical fiber connection port provided in a measurement probe main body, an airtight cover for airtightly covering the optical fiber connection port, and an airtight cover provided on the airtight cover. A measurement probe for spectroscopic analysis, comprising: an airtight cover internal pressure monitoring valve which is opened to the atmosphere when the internal pressure reaches a predetermined pressure. 2. An airtight cover made of aluminum material is used as said airtight cover.
The measurement probe for spectroscopic analysis according to the above. 3. The measuring probe for spectroscopic analysis according to claim 1, wherein a check valve is used as the valve for monitoring the internal pressure of the airtight cover.