CN114893730A - Leakage early warning detection method and system for indoor gas system - Google Patents
Leakage early warning detection method and system for indoor gas system Download PDFInfo
- Publication number
- CN114893730A CN114893730A CN202210596894.XA CN202210596894A CN114893730A CN 114893730 A CN114893730 A CN 114893730A CN 202210596894 A CN202210596894 A CN 202210596894A CN 114893730 A CN114893730 A CN 114893730A
- Authority
- CN
- China
- Prior art keywords
- gas
- air bag
- leakage
- collecting device
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000005070 sampling Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 18
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 239000000523 sample Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims description 8
- 210000004712 air sac Anatomy 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 218
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- 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
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
Abstract
The invention provides a leakage early warning detection method and system for an indoor gas system, wherein the method comprises the following steps: after the suspected leakage is found, a flexible gas collecting device is installed on the tested gas system and sealed, and the flexible gas collecting device comprises: a substrate layer 1, an air bag 2 and a low permeability layer 3; the air bag 2 is arranged between the base material layer 1 and the low permeability layer 3, preset gas is arranged in the air bag 2, a pressure relief window 4 is arranged between the base material layer 1 and the air bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 is close to a measured gas system; the substrate layer 1 of the flexible gas collecting device is rubbed to damage the pressure relief window 4, and the gas in the air bag 2 is mixed with the gas leaked by the gas system to be detected; the low permeability layer 3 that passes flexible gas collection device with the leak detection appearance probe, the extraction gas detects, includes: direct sampling or timed sampling.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a method and a system for early warning and detecting leakage of an indoor gas system.
Background
The safety of a residential gas system is an important component of city safety and is related to the safe gas utilization of gas users. According to the statistics of 2021 of the gas society of China, the gas user side accidents account for 69.7% of all kinds of gas accidents. The gas user side accident is mainly caused by gas leakage caused by failure of gas hoses, cookers, pipe fittings and the like, and is accumulated in local indoor space, and the gas user side accident detonates with open fire after the concentration of the gas reaches the explosion limit. Therefore, how to find the gas leakage in time before explosion happens and preventing accident loss is the main purpose of the invention of various house leakage detection technologies.
A catalytic combustion type leakage detector or a laser light common absorption leakage detector is adopted in the conventional indoor gas system detection, and according to the relevant standard requirements, the leakage detection concentration threshold is 1% LEL generally. The LEL is the lower explosive limit of the fuel gas, and depends on the type of fuel gas, for example, the LEL of methane is 5%. The resolution of conventional leak detection devices is therefore typically 10 -4 % although the current high precision leakage detection equipment can be made to 10 -6 % i.e. ppm level, but generally cannot be taken as a basis for leakage of indoor combustion gas because the combustion gas is not uniformly diffused in the space and because a small amount of combustion gas components (such as methane) formed by putrefactive degradation of organic matter may also exist in the room. Even though it is theoretically easier to detect the leakage concentration the closer the detection device probe is to the indoor gas system, it is still difficult to determine the leakage at the ppm level.
For some more important indoor gas utilization places, such as kitchens of large-scale comprehensive business bodies, canteens of government institutions and the like, the requirement on gas supply guarantee is high, the consequences caused by leakage are difficult to bear, and the gas leakage early warning is very necessary. The conventional leakage alarm or leakage detector is difficult to find leakage in early stage, and even if the leakage is found, the leakage detector is maintained after gas supply is stopped, which brings great inconvenience to users. Therefore, a leakage early warning detection method is urgently needed to find tiny leakage in advance and provide more time for subsequent maintenance.
Disclosure of Invention
The present invention is directed to a method and system for leak warning detection in an indoor gas system that overcomes, or at least partially solves, the above-mentioned problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
one aspect of the present invention provides an indoor gas system leakage early warning detection method, including: after the suspected leakage is found, a flexible gas collecting device is installed on the tested gas system and sealed, and the flexible gas collecting device comprises: a substrate layer 1, an air bag 2 and a low permeability layer 3; the air bag 2 is arranged between the base material layer 1 and the low permeability layer 3, preset gas is arranged in the air bag 2, a pressure relief window 4 is arranged between the base material layer 1 and the air bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 is close to a measured gas system; the substrate layer 1 of the flexible gas collecting device is rubbed to damage the pressure relief window 4, and the gas in the air bag 2 is mixed with the gas leaked by the gas system to be detected; the low permeability layer 3 that passes flexible gas collection device with the leak detection appearance probe, the extraction gas detects, includes: direct sampling or timed sampling; the direct sampling comprises the following steps: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased; the timing sampling comprises the following steps: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
Wherein the preset time interval t Extraction of Determined according to the following formula: t is t Extraction of ＝Q Air bag /Q Pump and method of operating the same (ii) a Wherein: q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
Wherein the gas leakage rate Q is determined according to the following formula: q is c.Q Air bag T; wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
In another aspect, the present invention provides a leakage early warning detection system for an indoor gas system, comprising: a flexible gas collection device and a leakage detector; wherein: flexible gas collection device includes: a substrate layer 1, an air bag 2 and a low permeability layer 3; the air bag 2 is arranged between the base material layer 1 and the low permeability layer 3, preset gas is arranged in the air bag 2, a pressure relief window 4 is arranged between the base material layer 1 and the air bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 is close to a measured gas system; the flexible gas collecting device is used for being installed on a tested gas system and sealed after suspected leakage is found, a base material layer 1 of the flexible gas collecting device is rubbed, a pressure relief window 4 is damaged, and gas in the air bag 2 is mixed with gas leaked by the tested gas system; the leak detector is used for leading the probe to penetrate through the low-permeability layer 3 of the flexible gas collecting device, and extracting gas for detection, and comprises: direct sampling or timed sampling; the direct sampling comprises the following steps: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased; the timing sampling comprises the following steps: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
Wherein the preset time interval t Extraction of Determined according to the following formula: t is t Extraction of ＝Q Air bag /Q Pump and method of operating the same (ii) a Wherein: q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
Wherein the gas leakage rate Q is determined according to the following formula: q is c.Q Air bag T; wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
Therefore, by adopting the method and the system for early warning and detecting the leakage of the indoor gas system, the flexible gas collecting device is adopted to isolate the detected pipeline from the indoor air, so that the interference of other indoor gas sources on the detection result can be eliminated, and the detection accuracy is improved. After the gas collecting device is installed on a measured pipeline, the gas collecting device stands for a period of time, so that leaked gas can be collected in the flexible gas collecting device to form local concentration rise, and the detection recognition rate is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic view of a flexible gas collecting device in an indoor gas system leakage early warning detection device provided in an embodiment of the present invention;
fig. 2 is a schematic view of another flexible gas collecting device in the leakage early warning detection device of the indoor gas system according to the embodiment of the present invention;
fig. 3 is a schematic view of another flexible gas collecting device in the leakage early warning detection device for an indoor gas system according to the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The leakage early warning detection method for the indoor gas system provided by the embodiment of the invention comprises the following steps:
and S1, after suspected leakage is found, mounting a flexible gas collecting device on the tested gas system and sealing, wherein the flexible gas collecting device comprises: a substrate layer 1, an air bag 2 and a low permeability layer 3; the air bag 2 is arranged between the base material layer 1 and the low permeability layer 3, preset gas is arranged in the air bag 2, a pressure relief window 4 is arranged between the base material layer 1 and the air bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 is close to the measured gas system.
Specifically, fig. 1 to 3 show schematic installation diagrams of a flexible gas collecting device in an indoor gas system leakage early warning detection device provided by an embodiment of the present invention, and with reference to fig. 1 to 3, the flexible gas collecting device includes: the structure schematic diagram of the straight pipe gas collecting device, the structure schematic diagram of the elbow gas collecting device and the structure schematic diagram of the three-way gas collecting device.
Wherein, flexible gas collection device includes: the gas bag comprises a base material layer 1, a gas bag 2 and a low-permeability layer 3, wherein the gas bag 2 is arranged between the base material layer 1 and the low-permeability layer 3, preset gas is arranged in the gas bag 2, a pressure relief window 4 is arranged between the base material layer 1 and the gas bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 of the flexible gas collecting device is close to the pipeline to be detected and is hermetically connected with the pipeline to be detected through a closing piece 5; the probe of the leakage detector passes through the low-permeability layer 3 of the flexible gas collecting device, and gas is extracted from the air bag 2 for detection.
The leakage early warning detection method for the indoor gas system can realize the ppm level (10) -6 %) was tested for minute leaks. The leakage detector is a suction-type common light absorption leakage detector, and the detection precision can reach the ppm level.
As an alternative to the embodiment of the invention, the pressure in the airbag 2 is set to 10 to 500 Pa. The purpose is that the pressure relief window 4 which is convenient for external force to be conducted to the substrate layer 1 releases the gas in the air bag 2 to be contacted with the detected pipeline, and the damage of the substrate layer 1 is determined through the pressure change.
As an alternative to the embodiment of the invention, the closure 5 is a self-sealing compound. The flexible gas collecting device has large-area self-sealing glue at the edge, so that the installation and sealing can be completed quickly; the port of the flexible gas collecting device is reinforced and sealed by a self-sealing adhesive tape made of the same material.
As an optional implementation of the embodiment of the present invention, the preset gas includes: air, nitrogen or an inert gas. The purpose is to reduce the influence of indoor background concentration on the detection result.
S2, rubbing the substrate layer 1 of the flexible gas collecting device to damage the pressure relief window 4, and mixing the gas in the airbag 2 with the gas leaked by the gas system to be detected;
s3, the probe of the leakage detector passes through the low-permeability layer 3 of the flexible gas collecting device, and gas is extracted for detection, and the method comprises the following steps: direct sampling or timed sampling;
the direct sampling comprises the following steps: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased;
the timing sampling comprises the following steps: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
Specifically, firstly, detecting a leakage detector probe along the laying position of an indoor gas system according to a conventional leakage detection method, after finding a suspected leakage position, installing a flexible gas collecting device on the detected gas system and sealing the gas collecting device, waiting for a certain time, then rubbing a substrate layer 1 of the gas collecting device to break a pressure relief window 4, wherein the pressure relief window 4 can be broken through extrusion and friction, so that gas in an air bag 2 can be contacted with the leaked gas of the detected pipeline, and after the gas in the air bag 2 is contacted with the leaked gas of the detected pipeline and fully and uniformly mixed, penetrating the leakage detector probe through a low permeable layer 3 of the flexible gas collecting device, and extracting the gas for detection.
Therefore, the flexible gas collecting device is adopted to isolate the detected gas system from the indoor air, so that the interference of other indoor gas sources to the detection result can be eliminated, and the detection accuracy is improved. After the gas collecting device is installed on a measured gas system, the gas collecting device stands for a period of time, so that leaked gas can be collected in the flexible gas collecting device to form local concentration increase, and the detection recognition rate is improved.
As an alternative to the embodiment of the present invention, the time interval t is preset Extraction of Determined according to the following formula:
t extraction of ＝Q Air bag /Q Pump and method of operating the same
Wherein: q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
As an alternative to the embodiment of the present invention, the gas leakage rate Q is determined according to the following formula:
Q＝c·Q air bag /t
Wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
Specifically, the suction-type optical common absorption leakage detector has two modes of gas extraction, namely direct sampling and timing sampling.
The direct sampling is qualitative detection, has low precision requirement, and can be used for conventional indoor leakage early warning detection. The detection process comprises the following steps: and (3) turning on a power supply, starting a control pump, enabling an inhalation probe or a guide pipe to penetrate through a low-permeability layer of the gas collecting device to directly extract the gas to be detected, displaying the concentration value of the over-flowing gas in the extraction process in real time by a leakage detector, and judging that gas leakage exists if the concentration value is suddenly increased.
The timing sampling is quantitative detection, and is used for measuring the indoor leakage rate according to the gas volume in the gas collecting device airbag. The detection process comprises the following steps: turning on the power supply, making the suction probe or guide tube pass through the low permeable layer of the gas-collecting device, starting the control pump to extract the gas to be detected, and determining and manually setting the extraction time tprawing according to the following formula
t Extraction of ＝Q Air bag /Q Pump and method of operating the same
Wherein:
Q air bag -the gas volume of the balloon under standard conditions;
Q pump and method of operating the same -controlling the pump suction rate under standard conditions;
the Q air bag is a series value for different types of air collecting devices, and the Q pump is a constant value for determined control pumps and suction devices. Therefore, after the detected gas is completely sucked, the pump is controlled to be closed at fixed time, at the moment, the gas concentration value c displayed by the leakage detector, and the indoor gas leakage rate Q can be determined according to the following formula.
Q＝c·Q Air bag /t
Wherein:
c-gas concentration value
t-the time when the gas collecting device is installed on the tested pipeline.
Therefore, according to the leakage early warning detection method for the indoor gas system provided by the embodiment of the invention, the detected pipeline is isolated from indoor air by the flexible gas collecting device, so that the interference of other indoor gas sources on the detection result can be eliminated, and the detection accuracy is improved. After the gas collecting device is installed on a measured pipeline, the gas collecting device stands for a period of time, so that leaked gas can be collected in the flexible gas collecting device to form local concentration rise, and the detection recognition rate is improved.
Has the following advantages:
1. the flexible gas collecting device is used for improving the detection resolution, and the micro leakage concentration of the indoor gas system can be accurately identified when reaching the ppm level.
2. The flexible gas collecting device is used for isolating indoor air and eliminating interference of other indoor fuel gas sources.
3. The flexible gas collection device has a certain amount of background gas, balances the suction rate of the suction type leakage detector and improves the detection accuracy. And the background gas is released only when the numerical value is detected, so that the gas leakage rate is not influenced and errors are not caused due to the fact that the external pressure of the detected gas system is increased.
The following provides an indoor gas system leakage early warning detection system, which is applied to the above method, and only briefly describes the functions of the system below, and please refer to the related description of the above method for other matters, the indoor gas system leakage early warning detection system provided by the embodiment of the present invention includes: a flexible gas collection device and a leakage detector; wherein:
flexible gas collection device includes: a substrate layer 1, an air bag 2 and a low permeability layer 3; the air bag 2 is arranged between the base material layer 1 and the low permeability layer 3, preset gas is arranged in the air bag 2, the pressure relief window 4 is arranged between the base material layer 1 and the air bag 2, and the pressure relief window 4 is easy to damage; the substrate layer 1 is close to a measured gas system;
the flexible gas collecting device is used for being installed on a tested gas system and sealed after suspected leakage is found, a base material layer 1 of the flexible gas collecting device is rubbed, a pressure relief window 4 is damaged, and gas in the air bag 2 is mixed with gas leaked by the tested gas system;
the leak detector is used for leading the probe to penetrate through the low-permeability layer 3 of the flexible gas collecting device, and extracting gas for detection, and comprises: direct sampling or timed sampling;
the direct sampling comprises the following steps: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased;
the timing sampling comprises the following steps: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
As an optional implementation of the embodiment of the invention, the presetting is performed in timeInterval t Extraction of Determined according to the following formula:
t extraction of ＝Q Air bag /Q Pump and method of operating the same
Wherein: q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
As an alternative to the embodiment of the present invention, the gas leakage rate Q is determined according to the following formula:
Q＝c·Q air bag /t
Wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
Therefore, according to the leakage early warning detection method for the indoor gas system provided by the embodiment of the invention, the detected pipeline is isolated from indoor air by the flexible gas collecting device, so that the interference of other indoor gas sources on the detection result can be eliminated, and the detection accuracy is improved. After the gas collecting device is installed on a measured pipeline, the gas collecting device stands for a period of time, so that leaked gas can be collected in the flexible gas collecting device to form local concentration rise, and the detection recognition rate is improved.
Has the following advantages:
1. the flexible gas collecting device is used for improving the detection resolution, and the micro leakage concentration of the indoor gas system can be accurately identified when reaching the ppm level.
2. The flexible gas collecting device is used for isolating indoor air and eliminating interference of other indoor fuel gas sources.
3. The flexible gas collection device has a certain amount of background gas, balances the suction rate of the suction type leakage detector and improves the detection accuracy. And the background gas is released only when the numerical value is detected, so that the gas leakage rate is not influenced and errors are not caused due to the fact that the external pressure of the detected gas system is increased.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. The utility model provides an indoor gas system leaks early warning detection method which characterized in that includes:
after a suspected leak is discovered, a flexible gas collection device is mounted on the tested gas system and sealed, the flexible gas collection device comprises: the air bag comprises a base material layer (1), an air bag (2) and a low-permeability layer (3); the air bag (2) is arranged between the base material layer (1) and the low permeation layer (3), a preset gas is arranged in the air bag (2), a pressure relief window (4) is arranged between the base material layer (1) and the air bag (2), and the pressure relief window (4) is easy to damage; the substrate layer (1) is close to the measured gas system;
rubbing a base material layer (1) of the flexible gas collecting device to damage the pressure relief window (4), and mixing gas in the air bag (2) with gas leaked by the gas system to be detected;
passing a leak detector probe through a low permeability layer (3) of the flexible gas collection device, extracting gas for detection, comprising: direct sampling or timed sampling;
the direct sampling includes: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased;
the timed sampling includes: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
2. Method according to claim 1, characterized in that said preset time interval t Extraction of Determined according to the following formula:
t extraction of ＝Q Air bag /Q Pump and method of operating the same
Wherein: said Q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
3. The method of claim 2, wherein the gas leakage rate Q is determined according to the following equation:
Q＝c·Q air bag /t
Wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
4. The utility model provides an indoor gas system leaks early warning detecting system which characterized in that includes: a flexible gas collection device and a leakage detector; wherein:
the flexible gas collecting device comprises: the air bag comprises a base material layer (1), an air bag (2) and a low-permeability layer (3); the air bag (2) is arranged between the base material layer (1) and the low permeation layer (3), a preset gas is arranged in the air bag (2), a pressure relief window (4) is arranged between the base material layer (1) and the air bag (2), and the pressure relief window (4) is easy to damage; the substrate layer (1) is close to the measured gas system;
the flexible gas collecting device is used for being installed on a tested gas system and sealed after suspected leakage is found, a base material layer (1) of the flexible gas collecting device is rubbed, the pressure release window (4) is damaged, and gas in the air bag (2) is mixed with gas leaked by the tested gas system;
the leakage detector is used for enabling a probe to penetrate through a low permeable layer (3) of the flexible gas collecting device, extracting gas and detecting, and comprises: direct sampling or timed sampling;
the direct sampling includes: the leakage detector controls the pump to pump gas in the gas bag, displays a gas concentration value in the pumping process in real time, and judges that gas leakage exists if the gas concentration value is suddenly increased;
the timed sampling includes: the leakage detector controls the pump to extract gas in the air bag according to a preset time interval, and calculates the gas leakage rate.
5. System according to claim 4, characterized in that said preset time interval t Extraction of Determined according to the following formula:
t extraction of ＝Q Air bag /Q Pump and method of operating the same
Wherein: said Q Air bag Is the gas volume of the air sac under standard conditions, Q Pump and method of operating the same The pump suction rate is controlled for standard conditions.
6. The system of claim 5, wherein the gas leakage rate Q is determined according to the following equation:
Q＝c·Q air bag /t
Wherein: c is a gas concentration value detected by the leakage detector, and t is the time when the flexible gas collecting device is installed on the detected gas system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596894.XA CN114893730A (en) | 2022-05-30 | 2022-05-30 | Leakage early warning detection method and system for indoor gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596894.XA CN114893730A (en) | 2022-05-30 | 2022-05-30 | Leakage early warning detection method and system for indoor gas system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114893730A true CN114893730A (en) | 2022-08-12 |
Family
ID=82725822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210596894.XA Pending CN114893730A (en) | 2022-05-30 | 2022-05-30 | Leakage early warning detection method and system for indoor gas system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114893730A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050166666A1 (en) * | 2004-02-04 | 2005-08-04 | Laserfront Technologies, Inc. | Piping structure having leak detection function and leak detector |
| KR101389881B1 (en) * | 2013-08-13 | 2014-06-19 | 송은가스연구개발 주식회사 | Multi-fuctional sem bag with safety features for gas pipeline blocking device and its manufacturing method |
| CN105448046A (en) * | 2015-12-08 | 2016-03-30 | 蓬江区绿星咨询服务中心 | Poisonous gas leakage monitoring and alarming protection air bag device for the chemical industry |
| CN205957496U (en) * | 2016-07-19 | 2017-02-15 | 科汉达（上海）能源科技有限公司 | Remote monitoring device of hanging stove |
| CN106764458A (en) * | 2016-12-28 | 2017-05-31 | 核动力运行研究所 | Flange leakage monitoring device and high energy pipe network flange leakage monitoring regulator control system |
| CN207351766U (en) * | 2017-10-18 | 2018-05-11 | 吴江港华燃气有限公司 | It is a kind of removably to descend fuel gas pipeline leakage detection and sampling apparatus |
| CN108870467A (en) * | 2018-07-06 | 2018-11-23 | 佛山市川东磁电股份有限公司 | Gas-cooker and its control method |
| CN208367889U (en) * | 2018-06-15 | 2019-01-11 | 山西大学 | gas pipeline emergency rescue device |
| CN110107815A (en) * | 2018-11-08 | 2019-08-09 | 清华大学合肥公共安全研究院 | The leakage detection method and device of gas pipeline |
| CN210135449U (en) * | 2019-05-05 | 2020-03-10 | 泉州市新奥交通能源发展有限公司 | Safe and reliable gas pipeline |
| CN112730519A (en) * | 2020-12-21 | 2021-04-30 | 哈尔滨工业大学 | Portable methane trace leakage quantitative detector and detection method thereof |
| CN113154270A (en) * | 2021-04-23 | 2021-07-23 | 深圳市中燃科技有限公司 | Gas leakage data monitoring system and installation method thereof |
| CN214467934U (en) * | 2021-02-23 | 2021-10-22 | 红云红河烟草(集团)有限责任公司 | Gas boiler natural gas line leakage detection alarm device |
| CN114383053A (en) * | 2022-01-26 | 2022-04-22 | 黄河科技学院 | Chemical pipeline toxic gas leakage monitoring protection device |
| CN216386931U (en) * | 2021-08-23 | 2022-04-26 | 胡勤 | Combustible gas detector with automatic gas leakage alarm function |
-
2022
- 2022-05-30 CN CN202210596894.XA patent/CN114893730A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050166666A1 (en) * | 2004-02-04 | 2005-08-04 | Laserfront Technologies, Inc. | Piping structure having leak detection function and leak detector |
| KR101389881B1 (en) * | 2013-08-13 | 2014-06-19 | 송은가스연구개발 주식회사 | Multi-fuctional sem bag with safety features for gas pipeline blocking device and its manufacturing method |
| CN105448046A (en) * | 2015-12-08 | 2016-03-30 | 蓬江区绿星咨询服务中心 | Poisonous gas leakage monitoring and alarming protection air bag device for the chemical industry |
| CN205957496U (en) * | 2016-07-19 | 2017-02-15 | 科汉达（上海）能源科技有限公司 | Remote monitoring device of hanging stove |
| CN106764458A (en) * | 2016-12-28 | 2017-05-31 | 核动力运行研究所 | Flange leakage monitoring device and high energy pipe network flange leakage monitoring regulator control system |
| CN207351766U (en) * | 2017-10-18 | 2018-05-11 | 吴江港华燃气有限公司 | It is a kind of removably to descend fuel gas pipeline leakage detection and sampling apparatus |
| CN208367889U (en) * | 2018-06-15 | 2019-01-11 | 山西大学 | gas pipeline emergency rescue device |
| CN108870467A (en) * | 2018-07-06 | 2018-11-23 | 佛山市川东磁电股份有限公司 | Gas-cooker and its control method |
| CN110107815A (en) * | 2018-11-08 | 2019-08-09 | 清华大学合肥公共安全研究院 | The leakage detection method and device of gas pipeline |
| CN210135449U (en) * | 2019-05-05 | 2020-03-10 | 泉州市新奥交通能源发展有限公司 | Safe and reliable gas pipeline |
| CN112730519A (en) * | 2020-12-21 | 2021-04-30 | 哈尔滨工业大学 | Portable methane trace leakage quantitative detector and detection method thereof |
| CN214467934U (en) * | 2021-02-23 | 2021-10-22 | 红云红河烟草(集团)有限责任公司 | Gas boiler natural gas line leakage detection alarm device |
| CN113154270A (en) * | 2021-04-23 | 2021-07-23 | 深圳市中燃科技有限公司 | Gas leakage data monitoring system and installation method thereof |
| CN216386931U (en) * | 2021-08-23 | 2022-04-26 | 胡勤 | Combustible gas detector with automatic gas leakage alarm function |
| CN114383053A (en) * | 2022-01-26 | 2022-04-22 | 黄河科技学院 | Chemical pipeline toxic gas leakage monitoring protection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102518948B (en) | Device and method for detecting combustible gas leakage | |
| US5537857A (en) | Leak indicator for vacuum systems and a method of searching for leaks in vacuum systems | |
| CN103629533B (en) | A kind of device and method of a plurality of buried natural gas line leakage arranged side by side | |
| CN104280200A (en) | Method for detecting sealing performance of vacuum cavity | |
| CN202074237U (en) | Pipeline leakage monitoring and negative pressure protecting device | |
| CN202083635U (en) | Gas analyzer for petroleum and gas | |
| CN210981934U (en) | Natural gas sampling detection device | |
| EP2005135B8 (en) | Method and apparatus for the detection of leaks | |
| CN105372304A (en) | Portable gas leakage detection device | |
| CN102023073A (en) | Method for detecting wall leakage | |
| CN103207050A (en) | Mass spectrometer leak detection helium pre-filling method capable of prolonging detection waiting time of sealing device | |
| CN201464133U (en) | Sleeve pipe and oil pipe joint leakage rate infrared radiation detection apparatus for test | |
| CN114893730A (en) | Leakage early warning detection method and system for indoor gas system | |
| CN108225682A (en) | A kind of valve secondary sealing detection device and detection method | |
| CN205333511U (en) | Oil gas concentration short -term test appearance | |
| CN103979238B (en) | Buried tank field, gas station multichannel leakage monitoring method | |
| CN217403709U (en) | Leakage early warning detection device for indoor gas system | |
| EP3907484B1 (en) | Detection of leakage in an aspirating fire detection system | |
| CN104655371A (en) | Hydrogen working medium leak rate test device for high-voltage NI-MH storage batteries | |
| CN207964192U (en) | A kind of valve secondary sealing detection device | |
| CN103590856B (en) | Monitoring method of mine gas beam tube line monitoring system | |
| CN2466652Y (en) | Coal self-combustion prediction forecasting device for safety monitoring of coal mine | |
| CN112489381B (en) | Hydrogen leakage detection alarm and event grade estimation method | |
| CN215296588U (en) | Building door and window air tightness performance detection device | |
| CN105572194A (en) | Tying type gas leakage detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |