KR101736765B1 - Calibrating and verifying device for in-situ probe type gas analyzer - Google Patents

Abstract

The present invention relates to an apparatus to calibrate and verify an in-situ probe type gas analyzer, performing calibration in a factory before installation thereof, to perform calibration during shipment and perform verification during a periodic checkup. According to the present invention, the apparatus comprises: a measuring instrument main body including a light emitting unit and a gas measurement unit; and a probe connecting one end to the measuring instrument main body, extending the other end to horizontally insert a gas cell or ceramic filter, as a measuring region, into a middle part; and having a reflective mirror in an end to guide light emitted from the light emitting unit in order to allow the light to be returned to the measuring instrument main body via the measuring region. The probe has an air curtain formation unit, and the gas cell comprises: a window formed on both end parts of the gas cell in a direction facing the probe; an integrated or separable cell cover closely attached to the probe to form a closed heating space surrounding the measuring region; a reference gas inlet installed in a lower part of the integrated or separable cell cover; a reference gas outlet installed in an upper part of the integrated or separable cell cover; a pressure sensor; and a temperature sensor. As such, the volume of reference gas used for calibration and verification is able to be reduced.

Description

Technical Field [0001] The present invention relates to an in-situ probe type gas analyzer, and more particularly to a calibrating and verifying device for in-

The present invention relates to a calibration and verification apparatus for an in-situ probe type gas meter, and more particularly, to a calibration and verification apparatus for an in-situ probe type gas meter, In addition, it is possible to maintain the uniformity of the in-situ probe type gas meter, to reduce the amount of standard gas during calibration and verification, to change the relationship between temperature, humidity and pressure, And more particularly to a calibration and verification apparatus for an in-situ probe type gas measuring instrument capable of solving the problem of measurement bias of existing calibration /

The in-situ gas measuring instrument is a continuous harmful gas measuring instrument for instantly measuring and analyzing the components of various exhaust gases discharged to the outside through an industrial stack duct, as shown in FIG. 1 A measuring instrument main body 10 fixed to the wall of the duct 3 and a probe 20 installed inside the duct 3. [

The measuring instrument body 10 includes a light emitting portion 11 for emitting light to the inside of the duct and a gas measuring portion 12 for measuring the exhaust gas passing through the duct through the incident light, Is connected to the measuring instrument body (10) through the wall of the duct (3) and the other end extends across the inside of the duct (3). A gas cell 21 or a ceramic filter 26 is horizontally provided as a measurement region (measurement sample passage region) in the middle of the body of the probe 20 and a reflecting mirror 22 is provided at an end thereof, And guides the light emitted from the light source 3 to be incident on the measuring instrument body 12 again after passing through the duct 3. The probe 20 is also provided with an air curtain forming portion 23 or a window 24 for preventing the exhaust gas or the standard gas passing through the duct 3 from flowing into the probe 20, (b) in the direction toward the gas cell 21 or the ceramic filter 26, respectively. The air curtain forming portion 23 or the window 24 may be installed parallel to each other on the left and right sides of the gas cell 21 or the ceramic filter 26 or be inclined.

This in-situ gas measuring instrument irradiates light (UV or IR) to a measurement sample crossing the lateral direction of the probe 20 and reflects the reflected light through the reflector 22 at the end of the probe 20 The gas concentration of a specific component (for example, SO ₂ , NO, NO ₂ , CO, CO ₂ , HCl, etc.) is measured by analyzing the light incident on the measuring instrument body 10, It is economical and has a technical advantage in response time because there is no need for separate gas pretreatment (process of separating only pure gas such as moisture, first removal).

On the other hand, such an in-situ gas meter requires periodic calibration and verification in order to obtain an accurate measurement value, and such a calibration operation usually uses a method of injecting a standard gas for calibration, so that the in- Injecting a standard gas for calibration into a duct in the state of the system involves several difficulties.

In this connection, Korean Patent Registration No. 10-1317058 (registered on Oct. 10, 2013, hereinafter abbreviated as "Patent Document 1") discloses an in situ gas measuring instrument capable of calibrating using a standard gas without converting an optical path. Technology is known.

According to Patent Document 1, there is provided a means for measuring and analyzing the exhaust gas discharged to the outside through the stack duct and calibrating itself, so that there is no complication of the structure due to the change of the optical path and the optical path is distorted by reflection It is possible to obtain a stable and accurate measurement value.

However, in the above conventional technology, facilities (ducts or chimneys) having the same structure as the site where the gas meter is installed are required to flow the actual calibration standard gas to the in-situ probe, and such facilities (ducts or chimneys) The standard gas for calibration is required to be flowed in, so that a very large amount of standard gas for calibration is required, which is not only economical but may cause air pollution. In addition, such calibration work must be carried out in a state in which exhaust gas is not discharged It is also unrealistic to just shut down plant facilities for calibration.

In order to solve the above problem, another difficulty is to change the optical path toward the probe and indirectly calibrate or verify by placing a separate gas cell. At this time, There is a possibility that the bias of the measurement method is always expected, not the same configuration (shortening of material, path, etc.) as the situ probe, and there is a question about whether it is authenticity after correction or inspection.

KR 10-1121552 B1 Registered March 6, 2012 KR 10-1317058 B1 Registered on 2013.10.02

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide an in-situ probe type gas measuring instrument that can be calibrated at a factory before installation, And it is possible to maintain uniformity of the in-situ probe type gas measuring instrument, to reduce the amount of standard gas during calibration and verification, to change the relationship between temperature, humidity and pressure The present invention also provides a calibration and verification apparatus for an in-situ probe type gas meter capable of solving the problem of measurement bias of existing calibration / verification equipment by making it possible to use the same for bias testing of existing gas meters.

According to an aspect of the present invention, there is provided an apparatus for measuring an exhaust gas or a standard gas passing through a gas cell in a probe through light emitted from an end of a probe, A measuring instrument main body having a gas measuring part for measuring a gas pressure; And the other end is connected to the measuring instrument main body, and the other end is extended to horizontally interpose the gas cell as the measurement area in the middle part, and the reflector is provided at the end, the light emitted from the light emitting part passes through the inner space of the gas cell, Wherein the probe is provided with an air curtain forming portion in a direction toward the gas cell so as to prevent a filling gas or a standard gas from being introduced into the probe; The gas cell is provided with windows at both ends thereof in the direction toward the probe so that the light emitted from the light emitting portion can pass through the space inside the gas cell; The gasket is formed in a cylindrical shape so as to surround the gas cell and the windows and air curtain forming portions at both ends thereof in a spaced manner so as to form a sealed filling space surrounding the gas cell and windows and air curtain forming portions at both ends thereof, An integral cell cover whose width is reduced and attached closely to the probes on both sides of the gas cell; A standard gas inlet provided at a lower portion of the integral cell cover for passing a standard gas through the body of the integral cell cover and inside the gas cell; A standard gas outlet installed at an upper portion of the integral cell cover for allowing a standard gas inside the gas cell to pass through the body of the integral cell cover and to flow out to the outside; A heating body for varying the filling gas or standard gas temperature in the gas cell; A pressure sensor installed in the gas cell so as to measure the internal pressure of the gas cell, and a pressure cell installed in the gas cell and the body of the integral cell cover in order so that the indicator is exposed above the integrated cell cover; And a temperature sensor installed in the gas cell so as to measure the internal temperature of the gas cell, and a sensing unit installed inside the gas cell, the gas cell and the integral cell cover being sequentially passed through the body so that the indication unit is exposed above the integrated cell cover. It is a calibration and verification device of probe type gas meter.

According to another aspect of the present invention, there is provided an apparatus for measuring an exhaust gas or a standard gas passing through a ceramic filter in a probe through light emitted from an end of a probe, A measuring instrument main body having a gas measuring part for measuring a gas pressure; And a reflector is provided at an end of the ceramic filter so that the light emitted from the light emitting portion passes through the inner space of the ceramic filter, And a probe for guiding the light emitted from the light emitting portion to the ceramic filter so that the light emitted from the light emitting portion can pass through the inner space of the ceramic filter while preventing the filling gas or the standard gas from being introduced into the probe. Respectively; The ceramic filter is formed of a ceramic filter and a cylindrical body so as to surround the ceramic filter and the windings at both ends of the ceramic filter so as to enclose the ceramic filter and the windows at both ends of the ceramic filter. However, both ends of the ceramic filter are reduced in width, A detachable cell cover closely attached to the probe; A standard gas inlet provided below the removable cell cover for injecting a standard gas through the body of the removable cell cover into the filling space; A standard gas outlet installed on the top of the removable cell cover for discharging the standard gas from the ceramic filter through the ceramic filter to the outside of the separable cell cover; A heating body for heating the standard gas to the interior space of the ceramic filter to change the gas temperature so as to penetrate or maintain it; A pressure sensor installed in the filling space so as to penetrate through the body of the cell cover to measure the internal pressure of the filling space and to be exposed to the upper portion of the detachable cell cover; And a temperature sensor installed in the filling space through the body of the removable cell cover so as to measure the internal temperature of the filling space, the sensing part being installed in the filling space so that the indication part is exposed on the upper part of the detachable cell cover. Calibration and verification devices.

According to the present invention, the in-situ probe type gas measuring instrument can be calibrated at the factory before installation so that it can be verified at the time of shipment calibration or periodic inspection, and the uniformity of the in-situ probe type gas measuring instrument can be maintained There is an advantage to be able to.

In addition, the present invention can reduce the amount of standard gas during calibration and verification, can control the relationship between temperature, humidity and pressure, and can be used for bias testing of existing gas meters, There is an advantage that the bias problem can be solved.

1 is a schematic diagram illustrating a gas meter having a general in-situ probe.
2 (a) and 2 (b) are enlarged views schematically illustrating structures of a conventional air curtain type in-situ probe and a window type in-situ probe, respectively, to which the present invention is applicable.
3 is a schematic cross-sectional view illustrating a calibration and verification apparatus of an in-situ probe type gas measuring instrument according to an embodiment of the present invention.
FIGS. 4A and 4B are schematic diagrams illustrating the fluid flow generated within the gas cell of FIG. 3;
5 is a schematic cross-sectional view illustrating a calibration and verification apparatus of an in-situ probe type gas measuring apparatus according to another embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view illustrating a side view of the calibration and verification apparatus of the in-situ probe type gas meter of FIG. 5;
FIG. 7 is a reference view illustrating the standard gas inlet and the standard gas outlet of FIG. 5;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the overall configuration and operation of a calibration and verification apparatus for an in-situ probe gas meter according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be substituted for them at the time of the present application shall.

FIG. 3 is a schematic cross-sectional view illustrating a calibration and verification apparatus of an in-situ probe type gas measuring apparatus according to an embodiment of the present invention, FIGS. 4A and 4B are views explaining fluid flow generated inside the gas cell of FIG. The calibration and verification apparatus of the in-situ probe type gas meter according to the embodiment of the present invention is applied to the structure of the conventional air curtain type in-situ probe illustrated in FIG. 2 (a) A probe 20 provided at the center of the measuring device main body 10, a gas cell 21, a heating body 25, an integral cell cover 29, a standard gas inlet 31, a standard gas outlet 32, , A pressure sensor (40), and a temperature sensor (50).

1 and 2A) includes a light emitting unit 11 that emits ultraviolet or infrared light toward the inside of the probe 20, a light emitting unit 11 which emits light such as ultraviolet or infrared light toward the inside of the probe 20, (For example, SO ₂ , CO, CO ₂ , NO, NO, or NO ₂ ) for the exhaust gas or the standard gas passing through the gas cell 21 in the probe 20, ₂ , HCl, and the like). The meter main body 10 or the measuring instrument main body 10 to which the probe 20 is connected may be installed in a duct but may not necessarily be installed in a duct, It can be fixed and installed, so it can be calibrated at the time of shipment and periodically checked after shipment without actually installing it in a duct. Since the method of installing the main body of the measuring device can be realized by a usual method, a detailed description thereof will be omitted.

3, one end of the probe 20 is connected to the measuring instrument body 10 and the other end of the probe 20 is extended to horizontally interpose a gas cell 21 as a measurement region in the middle portion, So that light such as ultraviolet rays or infrared rays emitted from the light emitting portion 11 of the measuring instrument body 10 passes through the inner space of the gas cell 21 and then guided to the measuring instrument body 10 again. The probe 20 is provided with an air curtain forming portion 23 in the direction toward the gas cell 21 so as to prevent the filling gas or the standard gas from flowing into the probe 20, In order to allow the light emitted from the light emitting portion 11 of the measuring instrument body 10 to pass through the inner space of the gas cell 21, windows 24 are provided at both ends thereof in the direction toward the probes 20 Respectively. These windows 24 may be parallel to each other or parallel and inclined at a constant angle.

The heating body 25 is placed in the filling space 27 for varying the filling gas or the standard gas temperature in the gas cell 21 and a plurality of pieces are uniformly spaced around the gas cell 21 as illustrated in FIG. For example, a rod heater heated in the longitudinal direction of the gas cell 21, and the like.

The integral cell cover 29 is installed to form a sealed filling space 27 which entirely surrounds the gas cell 21 and the window 24 at both ends thereof and the air curtain forming part 23, And both ends of the cylinder 24 are spaced apart from the circumference of the window 24 and the air curtain forming portion 23 at both ends thereof. The both ends of the cylinder are narrowed so as to correspond to the outer diameter of the probe 20 Is closely attached to the probes (20) on both sides of the gas cell (21). At this time, the window 24 of the gas cell 21 has an inclination of 4 ° to 6 °.

The standard gas inlet 31 is provided at the lower part of the integral cell cover 29 and has one end penetrating the body of the integral type cell cover 29 to penetrate the gas cell 21 And the other end is connected to an external standard gas supply unit (not shown in the figure) so as to be supplied with the standard gas.

The standard gas outlet 32 is provided at an upper portion of the integral cell cover 29 and has a first end communicating with the gas cell 21 through the body of the integrated cell cover 29, (Not shown).

The standard gas inlet port 31 and the standard gas outlet port 32 may be formed in such a manner that the standard gas injected into the gas cell 21 can form a gas flow that is rotated along the inner peripheral surface of the gas cell 21 It is preferable that the standard gas inlet port 31 and the standard gas outlet port 32 are formed eccentrically on one side from the center on the cross section of the gas cell 21, The standard gas injected into the gas cell 21 rotates along the inner circumferential surface of the gas cell 21 as shown in FIG. 4A, and at the same time, a gas flow of a whirling or spiral shape along the longitudinal direction of the gas cell 21 The standard gas outlet 32 is preferably installed at the opposite end of the standard gas inlet 31 as illustrated in FIG. 4B.

The standard gas supplied to the inside of the gas cell 21 through the standard gas inlet 31 in the standard gas supply part during the calibration and inspection of the gas measuring instrument 10 is filled only inside the gas cell 21, So that a very small amount of the standard gas will be consumed than when the gas meter is installed in the duct for calibration or inspection.

The pressure sensor 40 includes a gas cell 21 and an integral cell cover 29 so as to measure the internal pressure of the gas cell 21, In order.

The temperature sensor 50 is provided with a sensing part inside the gas cell so as to measure the internal temperature of the gas cell 21 and a gas cell 21 and an integral cell cover 29 And is installed through the body successively.

FIG. 5 is a schematic cross-sectional view illustrating a calibration and verification apparatus of an in-situ probe type gas meter according to another embodiment of the present invention, FIG. 6 is a cross-sectional view illustrating a calibration and verification apparatus of the in- FIG. 7 is a reference view illustrating the standard gas inlet and the standard gas outlet according to another embodiment of the present invention. FIG. 7 is a cross-sectional view illustrating the calibration of the in- And the verification apparatus can be implemented by being applied to the structure of the conventional window type in-situ probe illustrated in FIG. 2 (b), and includes a probe main body 10, a probe 20a provided at the center of the ceramic filter 26, The standard gas inlet port 31a, the standard gas outlet port 32a, the pressure sensor 40a, and the heating element 25 composed of the upper heating body 25a and the lower heating body 25b, the separable cell cover 30, And a sensor 50a.

The measuring instrument main body 10 is the same as that of the calibration and verification apparatus of the in-situ probe type gas measuring instrument according to the embodiment of the present invention, and a detailed description thereof will be omitted. Reference is made to the description of the calibration and verification apparatus of the in-situ probe type gas measuring instrument.

5, the probe 20a is connected at one end to the main body 10 of the measuring instrument and at the other end extends to horizontally interpose a ceramic filter 26 as a measurement region in the middle portion, and a reflector 22 Is guided so that light such as ultraviolet rays or infrared rays emitted from the light emitting portion 11 of the measuring instrument body 10 passes through the internal space of the ceramic filter 26 and is then incident on the measuring instrument body 10 again. The probe 20a is configured such that the light emitted from the light emitting portion 11 of the measuring instrument body 10 passes through the inner space of the ceramic filter 26 while the filling gas or the standard gas is not introduced into the probe 20a A window 24a is provided in the direction toward the ceramic filter 26 so as to enable the ceramic filter 26 to be formed. These windows 24a may be provided parallel to each other or parallel and inclined at a predetermined angle.

The heating body 25 is placed in the filling space 27 to heat the temperature of the standard gas impregnated into the ceramic filter 26 or to maintain the standard gas temperature in the ceramic filter 26, A lower heating body 25b having a function of heating the standard gas introduced into the lower filling space 27b to allow the heated standard gas to flow into the inner space of the ceramic filter 26, An upper heating body 25a having a function of heating the standard gas to maintain the standard gas temperature in the space inside the ceramic filter 26 is provided. The upper heating body 25a and the lower heating body 25b are spaced equally apart from each other in the upper filling space 27a and the lower filling space 27b so as to be adjacent to the upper cell cover 30a or the lower cell cover 30b For example, a rod-shaped heater or the like, which is placed in the longitudinal direction around the ceramic filter 26, or the like.

The detachable cell cover 30 includes a ceramic filter 26 and a ceramic filter 26 for forming a sealed filling space 27 surrounding the ceramic filter 26 and the window 24a at both ends thereof, And both end portions thereof are narrowed at each end so that the width thereof can correspond to the outer diameter of the probe 20a so that the probe 20a closely contacts the probes 20a on both sides of the ceramic filter 26 Respectively. In the case of the present invention applied to the structure of the window-type in-situ probe, the detachable cell cover 30 can be divided into the upper cell cover 30a and the lower cell cover 30b.

The upper cell cover 30a covers the upper portion of the ceramic filter 26 and the windows 24a at both ends thereof to form a sealed upper filling space 27a surrounding the upper portion of the ceramic filter 26 and the window 24a at both ends thereof. And the lower cell cover 30b is provided in the form of a ceramic filter 26 to form a sealed lower filling space 27b surrounding the lower portion of the ceramic filter 26 and the lower portion of the window 24a at both ends thereof, The separable cell cover 30 separates the upper and lower filling spaces 27a and 27b from the upper and lower portions of the ceramic filter 26, 6, the standard gas injected into the lower filling space 27b passes through the lower and upper portions of the ceramic filter 26, is discharged through the upper filling space 27a to the standard gas outlet 32a, .

The upper cell cover 30a and the lower cell cover 30b are packed tightly with each other so as to be isolated from each other to isolate the upper filling space 27a and the lower filling space 27b from each other . The reason why the upper cell cover 30a and the lower cell cover 30b are separated from each other to form the packing 28 and the standard gas inlet port 32a and the standard gas inlet port 31a are separated from each other, A portion of the standard gas that has passed through the first gas flow passage 31a is primarily diffused and strikes against the wall of the ceramic filter to flow out toward the standard gas outlet 32a. This prevents waste of the standard gas, So as to pass through the inside of the ceramic filter and exit to the standard gas outlet 32a.

The standard gas inlet 31a is installed at a lower portion of the separable cell cover 30 and penetrates the body of the separable cell cover 30 to inject the standard gas into the filling space 27. [

The standard gas outlet 32a is formed on the upper portion of the removable cell cover 30 and is formed to allow the standard gas discharged from the ceramic filter 26 to flow out of the separable cell cover 30 in the filling space 27 . This standard gas outlet 32a is designed so that standard gas injected into the filling space 27 through the standard gas inlet 31a as illustrated in Figure 7 can pass through as much of the ceramic filter 26 as possible, Is formed to be smaller than the number of gas injection ports (31a).

The standard gas supplied from the standard gas supply port to the inside of the detachable cell cover 30 through the standard gas inlet port 31a is filled in the lower filling space 27b and then supplied to the ceramic filter 26 can be discharged to the standard gas outlet 32a through the upper filling space 27a as much as possible so that a very small amount of the standard gas can be consumed than when the gas meter is installed in the duct for calibration or inspection Will be.

The pressure sensor 40a is installed in the filling space through the body of the detachable cell cover 30 so as to measure the internal pressure of the filling space 27, do.

The temperature sensor 50a is installed so that the sensing unit is installed in the filling space through the body of the detachable cell cover 30 to measure the internal temperature of the filling space 27 and the indicator is exposed on the detachable cell cover 30.

Hereinafter, the operation and operation of the calibration and verification apparatus of the in-situ probe type gas measuring instrument according to the present invention will be described.

Commonly to one embodiment and another embodiment of the present invention, the respective indication values of the temperature sensors 50, 50a and the pressure sensors 40, 40a of the calibration and verification apparatus of the in- It can be assumed that the gas condition of the probe is the gas condition. If a thermometer and a pressure gauge are also provided in the probe of the in-situ probe type gas measuring instrument, the gas condition of the in-situ probe can be used. It can also be used as a device.

In the case of one embodiment and another embodiment of the present invention, the probes 20 and 20a are connected to the measuring instrument body 10 for calibration or verification, and then the in-situ probe type gas meter is installed in the field When the measurement area of the probes 20 and 20a is constituted by the gas cell 21 or the ceramic filter 26 as in the respective embodiments of the present invention, the integral cell cover 29 is formed directly above and below the measurement area, Or the separable cell cover 30 and injecting the standard gas through the standard gas inlet 31 and 31a so as to verify or correct the error by comparing the standard gas with the indicator of the main body 10 do.

For example, in one embodiment of the present invention, after the probe 20 is connected to the meter body 10 for calibration or verification, before the in-situ probe-type gas meter is installed in the field, The integral cell cover 29 is mounted directly above and below the gas cell 21 serving as the measurement region and the standard gas is injected through the standard gas inlet 31, The standard gas introduced into the interior of the gas cell 21 can flow through the standard gas inlet 31 and the standard gas introduced into the interior of the gas cell 21, The gas can be moved to the standard gas outlet 32 while rotating along a whirl or spiral fluid flow in a first-in first-out manner continuous from the gas outlet 21 to the standard gas outlet 32, As much as possible You can expect to stay.

On the other hand, in the case of another embodiment of the present invention, after the probe 20a is connected to the measuring instrument body 10 for calibration or verification, before the in-situ probe type gas meter is installed in the field, A separable cell cover 30 composed of an upper cell cover 30a and a lower cell cover 30b is mounted just above and below the ceramic filter 26 which is the upper and lower filling spaces 27a, The upper cell cover 30a and the lower cell cover 30b are isolated and packed so that the standard gas inlet 31a is separated from the standard gas inlet 31a and then the standard gas is injected through the standard gas inlet 31a, The size of the outlet 32a is reduced or reduced, so that the standard gas will be able to stay in the ceramic filter 26 as much as possible.

In this state, calibration of the in-situ probe type gas meter can be performed by correcting the indicated value of the measured concentration by the relational expression of temperature, pressure and concentration (Boyle-Charles's law PV = nRT). Thus, the calibration and verification apparatus of the in-situ probe type gas measuring instrument according to the present invention can perform such operations in the field or pre-shipment factory through miniaturization of the equipment.

According to the present invention, it is possible to calibrate the in-situ probe type gas meter before installation (at the time of shipment) at the factory, so that the calibration at the time of shipment and the periodic inspection of the in- There is an advantage that it is possible even in a state where it is not.

According to the present invention, it is possible to measure the concentration of a specific gas in a state in which a standard gas used for calibration and verification of an in-situ probe gas meter is filled in the gas cell of the integral type cell cover or in the filling space of the detached type cell cover It provides an advantage that it can save a much larger amount of standard gas than that installed and calibrated in actual ducts.

Further, according to the present invention, it is possible to calibrate and check the in-situ probe type gas measuring instrument before (during shipment) from the factory so that the problem of occurrence of the measurement deflecting property of the calibration / And it is also advantageous in that it can be used for testing the resistance to environmental conditions of the in-situ probe type gas measuring instrument by maintaining the uniformity between products, and by controlling the relationship between temperature, humidity and pressure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, it is intended that the scope of the invention be defined by the claims appended hereto, and that all equivalent or equivalent variations thereof fall within the scope of the present invention.

10: Measuring instrument main body 11:
12: gas measuring section 20, 20a: probe
21: gas cell 22: reflector
23: air curtain forming section 24,24a: window
25: heating body 25a: upper heating body
25b: lower heating body 26: ceramic filter
27: filling space 27a: upper filling space
27b: Lower filling space 28: Packing
29: integral cell cover 30: detachable cell cover
30a: upper cell cover 30b: lower cell cover
31, 31a: Standard gas inlet port 32, 32a: Standard gas outlet port
40, 40a: Pressure sensor 50, 50a: Temperature sensor

Claims (9)

A light emitting part 11 which is fixedly installed and supported by a support so as to be directly usable at the time of manufacture or before shipment, and emits light toward the inside of the probe 20; A measuring instrument body 10 having a gas measuring part 12 for measuring an exhaust gas or a standard gas passing through the gas cell 21 in the probe 20; One end is connected to the measuring instrument body 10 and the other end is an intermediate portion extending in the horizontal direction so as to interpose the gas cell 21 as a measurement region in the horizontal direction. A reflecting mirror 22 is provided at the end, And a probe 20 for guiding the gas to be introduced into the main body 10 after passing through the internal space of the gas cell 21,
The probe 20 has a gas cell 21 as a measurement region disposed horizontally at an extended portion of the intermediate portion and a gas cell 21 for preventing a filling gas or a standard gas from flowing into the probe 20 The air curtain forming portion 23 is provided in the direction of the air curtain forming portion 23;
Windows 24 are provided at both ends of the gas cell 21 in a direction toward the probe 20 so that the light emitted from the light emitting unit 11 can pass through the inner space of the gas cell 21;
The gas cell 21 and the windows 24 at both ends of the gas cell 21 and the gaskets 21 at both ends of the gaskill 21 and the air curtain forming part 23 are formed to form a sealed filling space 27 surrounding the gas cell 21, And both end portions of the cylindrical body are reduced in width at the end portions thereof and are closely attached to the probes 20 on both sides of the gas cell 21 so as to surround the air curtain forming portion 23 in a spaced- (29);
A plurality of heaters 25 disposed in the filling space 27 for uniformly varying the temperature of the filling gas or the standard gas in the gas cell 21, );
A standard gas inlet 31 installed at a lower portion of the integral type cell cover 29 for passing a standard gas through the body of the integral type cell cover 29 into the gas cell 21;
A standard gas outlet 32 installed at an upper portion of the integral type cell cover 29 for allowing the standard gas inside the gas cell 21 to pass through the body of the integral type cell cover 29 to the outside;
A sensing part is installed inside the gas cell so as to measure the internal pressure of the gas cell 21 and the body of the integral cell cover 29 is sequentially passed through the gas cell 21 so that the indication part is exposed above the integral cell cover 29 A pressure sensor (40) installed on the body; And
The sensing unit is installed inside the gas cell so as to measure the internal temperature of the gas cell 21 and the body of the integrated cell cover 29 is sequentially passed through the gas cell 21 so that the indication unit is exposed above the integrated cell cover 29 And a temperature sensor (50)
The filling gas or the standard gas supplied through the standard gas inlet port 31 from the standard gas supply port is filled only in the interior of the gas cell 21 for calibration or inspection of the gas meter 10 and then flows out to the standard gas outlet port 32 So that the amount of gas consumed can be reduced compared with the case where the gas measuring instrument is directly installed in the duct for calibration or inspection.
The standard gas inlet (31) and the standard gas outlet (32)
Each inlet and outlet are eccentrically formed on one side of the cross section of the gas cell so that a standard gas injected into the gas cell 21 can form a gas flow rotating along the inner circumferential surface of the gas cell 21 And the calibration and verification device of the in-situ probe type gas meter. delete 2. The apparatus according to claim 1, wherein the standard gas outlet (32)
In order to allow the standard gas injected into the gas cell 21 to form a whirl or a spiral gas flow along the longitudinal direction of the gas cell 21, Wherein the gas sensor is installed at an end of the gas sensor. A light emitting part 11 which is fixedly installed and supported by a support so as to be directly usable at the time of manufacture or before shipment, and emits light toward the inside of the probe 20a; A measuring instrument body 10 having a gas measuring part 12 for measuring an exhaust gas or a standard gas passing through the ceramic filter 26 in the probe 20a; One end of the ceramic filter 26 is connected to the main body 10 of the measuring instrument and the other end thereof extends in the middle so that the ceramic filter 26 as a measurement area can be horizontally interposed therebetween. And a probe 20a for guiding the laser beam to be incident on the measuring instrument body 10 after passing through the inner space of the ceramic filter 26,
The probe 20a is provided with a ceramic filter 26 as a measurement region in the extending portion of the intermediate portion in the horizontal direction so that the filling gas or the standard gas does not flow into the probe 20a, A window 24a is provided in the direction toward the ceramic filter 26 so that the light can pass through the inner space of the ceramic filter 26;
The ceramic filter 26 and the window 24a at both ends of the ceramic filter 26 are spaced apart from each other to form a sealed filling space 27 surrounding the ceramic filter 26 and the window 24a at both ends thereof A detachable cell cover 30 whose both ends are reduced in width at each end and closely attached to the probes 20a on both sides of the ceramic filter 26;
A standard gas inlet 31a provided at a lower portion of the removable cell cover 30 to penetrate the body of the removable cell cover 30 to inject the standard gas into the filling space 27;
A standard gas outlet 32a provided at an upper portion of the removable cell cover 30 for discharging the standard gas discharged through the ceramic filter 26 from the charging space 27 to the outside of the removable cell cover 30;
A heating body 25 which is placed in the filling space 27 to heat the temperature of the standard gas impregnated into the ceramic filter 26 or to maintain the standard gas temperature in the ceramic filter 26;
A pressure sensor 40a installed in the filling space through the body of the detachable cell cover 30 so as to measure the internal pressure of the filling space 27, ; And
A temperature sensor 50a installed in the filling space through the body of the detachable cell cover 30 so as to measure the internal temperature of the filling space 27, Lt; / RTI >
The detachable cell cover (30)
The upper part of the ceramic filter 26 and the upper part of the window 24 at both ends thereof are enclosed to form a sealed upper filling space 27a surrounding the upper part of the ceramic filter 26 and the window 24a at both ends thereof. An upper cell cover 30a,
A lower portion of the ceramic filter 26 and lower portions of the window 24a at both ends thereof are formed to form a sealed lower filling space 27b surrounding the lower portion of the ceramic filter 26 and the lower portion of the window 24a at both ends thereof. And the cell cover 30b,
The standard gas supplied from the standard gas supply port 31a through the standard gas inlet 31a is filled in the lower filling space 27b of the detachable cell cover 30 for calibration or inspection of the gas meter 10, Through the upper filling space 27a through the standard gas outlet 32a so that a smaller amount of gas can be consumed than when the gas measuring instrument is directly installed in the duct for calibration or inspection Characterized in that the in-situ probe type gas measuring instrument is calibrated and verified. 5. The method according to claim 4, wherein the standard gas outlet (32a)
The standard gas injected into the filling space 27 through the standard gas inlet 31a is formed to be smaller than the number of the standard gas inlet 31a so as to pass through as much of the area of the ceramic filter 26 as possible And a calibration and verification device for an in-situ probe type gas measuring instrument. delete [6] The apparatus of claim 4, wherein the upper cell cover (30a) and the lower cell cover (30b)
And is packed tightly in a structure that is isolated from each other so as to isolate the upper filling space (27a) and the lower filling space (27b) from each other. Device. The heating apparatus according to claim 4, wherein the heating body (25)
A lower heating body 25b which heats the standard gas introduced into the lower filling space 27b and is introduced into the lower filling space 27b for introducing the standard gas heated into the inner space of the ceramic filter 26;
And is divided into an upper heating body 25a which is installed in the upper filling space 27a so as to heat the standard gas introduced into the upper filling space 27a and maintain the standard gas temperature in the inner space of the ceramic filter 26 And a calibration and verification device for an in-situ probe type gas measuring instrument. 9. The apparatus according to claim 8, wherein the upper heating body (25a) and the lower heating body (25b)
A plurality of pieces are uniformly spaced and arranged in the upper filling space 27a and the lower filling space 27b so as to be adjacent to the upper cell cover 30a or the lower cell cover 30b, And the gas is introduced in the direction of the gas.

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