KR101774145B1 - Gas leakage sensing apparatus - Google Patents

Gas leakage sensing apparatus Download PDF

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Publication number
KR101774145B1
KR101774145B1 KR1020160027731A KR20160027731A KR101774145B1 KR 101774145 B1 KR101774145 B1 KR 101774145B1 KR 1020160027731 A KR1020160027731 A KR 1020160027731A KR 20160027731 A KR20160027731 A KR 20160027731A KR 101774145 B1 KR101774145 B1 KR 101774145B1
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KR
South Korea
Prior art keywords
amount
light
gas
overflow pipe
light emitting
Prior art date
Application number
KR1020160027731A
Other languages
Korean (ko)
Inventor
김두종
박재승
Original Assignee
한국서부발전 주식회사
주식회사 대명스카다
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Application filed by 한국서부발전 주식회사, 주식회사 대명스카다 filed Critical 한국서부발전 주식회사
Priority to KR1020160027731A priority Critical patent/KR101774145B1/en
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Publication of KR101774145B1 publication Critical patent/KR101774145B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/38—Investigating fluid-tightness of structures by using light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06113—Coherent sources; lasers
    • G01N2201/0612—Laser diodes

Abstract

[0001] The present invention relates to a gas leakage detecting device, and more particularly, to a gas leakage detecting device which uses an infrared ray and is not affected by toxic substances contained in a leakage gas and is not affected by environmental factors such as temperature, The amount of gas can be measured, and the amount of leaked gas can be confirmed in real time, thereby improving safety.
To this end, the present invention provides a light emitting device comprising: a light emitting element that emits light into air introduced into a pressure pipe; a reflector mounted to face the light emitting element to reflect light passing through the air; A gas leakage detection sensor comprising a light receiving element for measuring the amount of light reflected through the reflector and an integrated controller for calculating the amount of the leakage gas contained in the air introduced into the pressure tube through the amount of light transmitted from the light receiving element The gas leakage detecting device comprising:

Description

[0001] The present invention relates to a gas leakage sensing apparatus,

The present invention relates to a gas leakage detecting device.

Generally, a gas leakage sensor used in a power generation facility is installed in a gas turbine combustion and a fuel system in order to equip an explosion accident of a LNG combustion system and a fire risk. Such a gas leakage sensor is a catalytic type requiring periodical calibration, requiring maintenance time and calibration gas purchase at the time of calibration, increasing cost and time, and being vulnerable to temperature change, resulting in malfunctions and malfunctions. Problems can arise.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art, and it is an object of the present invention to provide a gas leakage detecting sensor which is not affected by toxic substances contained in a leaked gas, And it is an object of the present invention to provide a gas leakage detection device capable of measuring a leak gas amount without being influenced by environmental factors.

Another object of the present invention is to provide a gas leakage sensing device capable of improving the safety because the amount of leakage gas can be confirmed in real time.

According to an aspect of the present invention, there is provided a gas leakage detecting apparatus including a light emitting element for emitting light into air introduced into a pressure pipe, a reflector mounted to face the light emitting element, And a light receiving element mounted on the reflector and spaced apart from the light emitting element to measure an amount of light reflected through the reflector, And an integrated controller for calculating the amount of the leakage gas contained in the air introduced into the pressure tube.

A valve mounted adjacent to the intake port of the overflow pipe for controlling the opening and closing of the overflow pipe; a filter mounted on the overflow pipe so as to be adjacent to the valve and removing impurities of air introduced through the valve; A pump mounted on the overflow pipe so as to be adjacent to the filter and sucking the air on the suction port side of the overflow pipe and supplying the air on the side of the discharge port; And a case which surrounds the overflow pipe, the valve, the filter, the pump, the flow rate device and the leakage sensor, and exposes the inlet and the outlet of the overflow pipe to the outside .

The case and the overpressure pipe may be made of stainless steel.

The display controller may further include a display device electrically connected to the integrated controller, the display device mounted on the outside of the case and outputting the calculated leakage gas amount.

The light emitting device may be an infrared laser diode for irradiating a wavelength at which a leak gas can be absorbed.

The light emitting device may emit a laser beam having a wavelength of 1.66 mu m which is a wavelength of light absorbable by methane (CH4) that may leak in the LNG combustion system.

The integrated controller may include a memory in which a reference value for the amount of light measured in the light receiving element is stored in accordance with the amount of light irradiated from the light emitting element mounted in the closed space and the amount of the leaked gas injected into the closed space.

The integrated controller can calculate the amount of leakage gas by comparing the light amount measured by the light receiving element of the leakage detection sensor with the reference value stored in the memory.

The integrated controller converts the calculated amount of leaked gas into a digital signal and transmits it to the main PC as a host controller by communication, and the main PC can store data on the amount of the leaked gas.

The gas leakage detection device according to the present invention is a leakage detection sensor that uses infrared rays and thus is not affected by toxic substances contained in the leakage gas and is not affected by environmental factors such as temperature, It becomes possible to measure.

Further, the gas leakage detecting apparatus according to the present invention can check the amount of leaked gas in real time, thereby improving the safety.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view illustrating a gas leakage sensing apparatus according to an embodiment of the present invention; FIG.
2 is a structural view showing the structure of the gas leakage sensor of FIG.
3 is a flowchart showing a method of detecting gas leakage in the gas leakage detecting apparatus of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items. In the present specification, the term " connected "means not only the case where the A member and the B member are directly connected but also the case where the C member is interposed between the A member and the B member and the A member and the B member are indirectly connected do.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

It is to be understood that the terms related to space such as "beneath," "below," "lower," "above, But is used for an easy understanding of other elements or features. The term related to such a space is for easy understanding of the present invention depending on various process states or usage states of semiconductor devices, and is not intended to limit the present invention. For example, if the semiconductor device in the figures is inverted, the elements described as "lower" or "lower" will be "upper" or "above." Accordingly, "below" includes "upper" or "lower ".

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

Here, parts having similar configurations and operations throughout the specification are denoted by the same reference numerals. In addition, when a part is electrically coupled to another part, it includes not only a direct connection but also a case where the other part is connected to the other part in between.

Referring to FIG. 1, a gas leakage sensing apparatus according to an embodiment of the present invention is shown. As shown in FIG. 1, the gas leakage sensing apparatus 100 includes a valve 110, a filter 120, a pump 130, a flow meter 140, and a gas leakage sensor 150. The gas leakage sensing device 100 may be installed in a turbine of a power generation facility to check whether leakage gas has been generated. The gas leakage sensing apparatus 100 includes a case 100b surrounding a valve 110, a filter 120, a pump 130, a flow meter 140 and a gas leakage sensor 150, And may further include an overpressure pipe 100a for sucking and moving air. The overflow pipe 100a and the case 100b may be made of a material that is not affected by toxic and inert materials that may be generated in the power generation facility. For example, the pressure tube 100a and the case 100b may be made of stainless steel.

The overflow pipe 100a may be exposed to the outside of the case 100b with a suction port for sucking air and a discharge port for discharging the air. The valve 110, the filter 120, the pump 130, the flow meter 140, and the gas leakage sensor 150 are sequentially arranged in the direction from the inlet (in) to the outlet (out) Can be mounted. The valve 110, the pump 130, the flow meter 140, and the gas leakage sensor 150 may be electrically connected to the integrated controller 160. The valve 110, the pump 130 and the gas leakage sensor 150 may receive voltage and control signals for driving from the integrated controller 160, The flow rate can be measured and transmitted to the integrated controller 160.

The valve 110 is mounted adjacent to the suction port " in " The valve 110 is electrically connected to the integrated controller 160 and receives a control signal from the integrated controller 160 to open and close the pressure tube 100a. In addition, the valve 110 can open / close the overflow pipe 100a and adjust the flow rate of the air in the overflow pipe 100a by controlling the opening degree of the overflow pipe 100a.

The filter 120 may be positioned between the valve 110 and the pump 130 in the pressure tube 100a. That is, the filter 120 removes particles such as dust and particles contained in the air sucked through the suction port in by driving the pump 130. That is, the filter 120 removes impurities from the sucked air, and is then applied to the pump 130. The filter 120 may be cleaned or replaced depending on the contamination state or the usage period. The filter 120 can be controlled so as not to affect the amount of air sucked through the pressure tube 100a due to the impurities remaining in the filter 120. [

The pump 130 sucks air on the side of the suction port (in) of the overflow pipe 100a and supplies the air to the discharge port (out). That is, the air, from which the impurities are removed through the filter 120, is supplied to the flow rate meter 140 and the gas leakage sensor 150 by driving the pump 130. The pump 130 may be powered by the integrated controller 160 and may be driven. The pump 130 may be a diaphragm pump, but the present invention is not limited thereto.

The flow meter 140 measures the flow rate of the air in the overflow pipe 100a and transmits the measured flow rate to the integrated controller 160. [ The integrated controller 160 drives the gas leakage detection sensor 150 when the air flow rate in the overpressure pipe 100a measured by the flow meter 140 is maintained constant. The constant flow rate may be selected from 3 to 5 L / min. In addition, when an abnormality occurs in the pump 130 or the filter 120 is contaminated, an abnormal fluctuation phenomenon occurs in the flow rate in the overflow pipe 100a measured by the flow rate meter 140, have. That is, the integrated controller 160 can operate the gas leakage sensor 150 at a predetermined flow rate through the flow rate measured through the flow meter 140 and check whether the pump 130 and the filter 120 are abnormal So that replacement of parts is facilitated and safety can be improved.

The gas leakage sensor 150 optically senses the concentration of the leakage gas contained in the air sucked into the overflow pipe 100a. Also, the gas leakage sensor 150 can measure the amount of methane (CH4) which is a leaked gas in the LNG combustion system of the power generation facility. The configuration of the gas leakage detection sensor 150 is shown in FIG. 2, and the method of driving the gas leakage detection sensor 150 is shown in a flowchart in FIG.

Hereinafter, a configuration and a driving method of the gas leakage sensor 150 will be described with reference to FIGS. 2 and 3. FIG.

The gas leakage sensor 150 includes a light emitting element 151, a light receiving element 152, and a reflector 153. Here, the light emitting device 151, the light receiving element 152, and the reflector 153 may be formed of one set of detection sensors, and the gas leakage detection sensor 150 may include various sets of detection sensors, It is not limited thereto.

The light emitting device 151 and the light receiving device 152 may be mounted on one side of the case of the gas leakage sensor 150 and the reflecting mirror 153 may be mounted on a side opposite to the one side. That is, the reflecting mirror 153 may be mounted so as to face the light emitting element 151 and the light receiving element 152.

The light emitting device 151 and the light receiving device 152 may be electrically connected to the integrated controller 160. That is, the integrated controller 160 can control the amount of light emitted from the light emitting element 151 and receive the measured amount of light from the light receiving element 152.

 The gas leakage sensor 150 irradiates light S1 through the light emitting element 151 in the air introduced through the overflow tube 100a and reflects the irradiated light through the reflecting mirror 153 to be received by the light receiving element 152 and the light amount S2 measured by the light receiving element 152 may be transmitted to the integrated controller 160 as an electrical signal. The light emitting device 151 may be an infrared laser diode that emits a wavelength capable of absorbing the leaked gas. The light emitting device 151 can emit a laser beam having a wavelength of 1.66 mu m which is the wavelength of light absorbable by the methane CH4.

The light emitting device 151 may be mounted so as to be spaced apart from the light receiving element 152 in a direction parallel to the longitudinal direction x of the pressure tube 100a. The reflector 153 may be spaced from the light emitting device 151 in a direction perpendicular to the longitudinal direction x of the overpressure tube 100a. The light emitting element 151 and the light receiving element 152 are arranged on the side of the overflow pipe 100a through which the air flows in the longitudinal direction x of the overflow pipe 100a, And the reflector 153 is spaced apart from the light emitting device 151 in the longitudinal direction x and mounted on the side of the overflow pipe 100a through which the air flows. This is not limitative of the present invention, for example.

The light emitting device 151 may irradiate light into the air moving along the longitudinal direction x of the pressure tube 100a and the irradiated light may be reflected through the reflecting mirror 153. [ At this time, the methane contained in the leaking gas in the air can absorb light, and the amount of light incident on the light receiving element 152 through the reflecting mirror 153 can be reduced as the amount of methane increases. That is, when the same light is irradiated by the light emitting element 151, the amount of light detected by the light receiving element 152 decreases as the amount of the leaked gas increases. The light receiving element 152 may transmit the measured amount of light to the integrated controller 160.

The integrated controller 160 may calculate the amount of light absorbed from the leaked gas through the amount of light transmitted from the light receiving element 152 and calculate the amount of the leaked gas through the calculated amount. That is, the integrated controller 160 can calculate the amount of leaked gas in accordance with the amount of light detected by the light receiving element 152, compared with the amount of light irradiated by the light emitting element 151.

The integrated controller 160 also includes a memory 161 in which a reference value of the amount of leaked gas with respect to the amount of light detected by the light receiving element 152 is stored with respect to the amount of light irradiated by the light emitting element 151 . The reference value is data on the amount of light measured in the light receiving element in accordance with the amount of light irradiated from the light emitting element mounted in the closed space and the amount of the leaked gas injected into the space.

That is, the integrated controller 160 compares the reference value stored in the memory 161 with the amount of light measured in the light receiving element 152 of the gas leakage sensor 150 to calculate the amount of leaked gas (S3) have. The gas leakage sensor 150 is an infrared sensor and can measure the amount of the leak gas without being affected by environmental factors such as temperature, pressure and humidity without being influenced by the toxic substances contained in the leak gas.

Also, the integrated controller 160 converts the calculated amount of leaked gas into a digital signal and can be transmitted by communication to a main PC (not shown) as an upper controller, and data about the amount of leaked gas is stored in the main PC (S4) . In addition, data on the amount of leaked gas can be stored in the main PC, and the amount of leaked gas can be checked in real time. If the amount of leaked gas is more than a predetermined value, the risk of explosion can be prevented through equipment inspection.

Also, the integrated controller 160 may convert and amplify the calculated amount of leaked gas and output (S4) through a display device (not shown) mounted outside the case 100b. The amount of leaked gas can be checked in real time through the display device. For example, the leakage gas amount may be converted into a signal of 4 to 20 mA, amplified and output for output through the display device. The amount of the leakage gas output through the display device may be 4 mA when the leakage gas amount is 0% of the reference value and 20 mA when the leakage gas amount is 100%. This is not limitative of the present invention, for example.

It is to be understood that the present invention is not limited to the above-described embodiment, and that various modifications and changes may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100; Gas Leak Detector
110; Valve 120; filter
130; Pump 140; Flow meter
150; A gas leakage sensor 160; Integrated controller

Claims (9)

A reflector mounted to face the light emitting element and reflecting the light passing through the air, and a reflector facing the reflector and spaced apart from the light emitting element, A gas leakage sensor comprising a light receiving element for measuring the amount of light reflected through the reflector; And
And an integrated controller for calculating an amount of leaked gas contained in the air introduced into the overflow tube through the amount of light transmitted from the light receiving element,
Wherein the integrated controller includes a memory for storing a reference value for the amount of light measured in the light receiving element in accordance with the amount of light irradiated from the light emitting element mounted in the closed space and the amount of the leaked gas injected into the closed space,
Wherein the integrated controller calculates the amount of leakage gas by comparing a light amount measured by the light receiving element of the leakage detection sensor with a reference value stored in the memory. The method according to claim 1,
A valve mounted adjacent to the suction port of the overflow pipe for controlling opening and closing of the overflow pipe;
A filter mounted on the overflow pipe so as to be adjacent to the valve to remove impurities of air introduced through the valve;
A pump mounted on the overflow pipe so as to be adjacent to the filter and sucking air on the suction port side of the overflow pipe and supplying the air on the side of the discharge port;
A flow meter mounted on the overflow pipe between the pump and the leakage sensor for measuring a flow rate of air sucked through the pump; And
Further comprising: a case that surrounds the overflow pipe, the valve, the filter, the pump, the flow rate sensor, and the leakage sensor, and exposes an inlet and an outlet of the overflow pipe to the outside. The method of claim 2,
Wherein the case and the overpressure pipe are made of stainless steel. The method of claim 2,
And a display device electrically connected to the integrated controller, the display device being mounted on the outside of the case and outputting the calculated amount of the leakage gas. The method according to claim 1,
Wherein the light emitting device is an infrared laser diode for irradiating a wavelength at which a leak gas can be absorbed. The method of claim 5,
Wherein the light emitting element emits a laser beam having a wavelength of 1.66 mu m which is a wavelength of light absorbable in methane (CH4) that can be leaked in the LNG combustion system. delete delete The method according to claim 1,
Wherein the integrated controller converts the calculated amount of leaked gas into a digital signal and transmits it to the main PC as a host controller by communication, and the main PC stores data on the amount of the leaked gas.
KR1020160027731A 2016-03-08 2016-03-08 Gas leakage sensing apparatus KR101774145B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102093357B1 (en) * 2019-09-23 2020-03-25 이순학 Actuator control apparatus
KR102093359B1 (en) * 2019-09-23 2020-03-25 이순학 Actuator control apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117418A (en) * 2011-12-02 2013-06-13 Shimadzu Corp Gas concentration measuring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117418A (en) * 2011-12-02 2013-06-13 Shimadzu Corp Gas concentration measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102093357B1 (en) * 2019-09-23 2020-03-25 이순학 Actuator control apparatus
KR102093359B1 (en) * 2019-09-23 2020-03-25 이순학 Actuator control apparatus

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