CN108561757B - Parameter setting method of gas leakage detection device - Google Patents
Parameter setting method of gas leakage detection device Download PDFInfo
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- CN108561757B CN108561757B CN201810223747.1A CN201810223747A CN108561757B CN 108561757 B CN108561757 B CN 108561757B CN 201810223747 A CN201810223747 A CN 201810223747A CN 108561757 B CN108561757 B CN 108561757B
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 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
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Abstract
The invention discloses a parameter setting method of a gas leakage detection device, wherein in the step A, when the output end of the detection device is not deflated, the air pressure difference PA between an air inlet channel and an air outlet channel is convenient to correct the actual detection error of a pressure difference sensor through PB-PA when a proportional parameter K is calculated subsequently, in the step B2, a main control module needs to control a main channel electromagnetic valve to be switched on and off successively, if a detected pipeline leaks gas and a bypass channel is not arranged to perform gas supplement output on the air outlet channel, the air pressure difference between the air inlet channel and the air outlet channel is increased along with time, the detection result of the pressure difference sensor cannot correspond to the flow L of a standard leak hole, the bypass channel plays a role of supplementing the gas leakage of the output end so as to ensure that the pressure difference PB detected by the pressure difference sensor can correspond to the flow L of the standard leak hole subsequently, it has outstanding substantive features and remarkable progress.
Description
Technical Field
The invention relates to a parameter setting method of a gas leakage detection device.
Background
At present, the existing gas water heater and gas stove mainly detect whether gas leaks outside a gas pipeline by arranging a gas sensor, sometimes the gas is insufficiently combusted, the exhaust gas after combustion is not timely discharged, the detection of the gas sensor is also influenced, and the condition is mistakenly triggered.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.
Disclosure of Invention
The invention overcomes the defects of the technology and provides a parameter setting method of a gas leakage detection device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a parameter setting method of a gas leakage detection device comprises a main control module 1, a gas inlet channel 2, a main channel electromagnetic valve 3 and a gas outlet channel 4, wherein the gas inlet channel 2, the main channel electromagnetic valve 3 and the gas outlet channel 4 are sequentially connected, a bypass channel 5 is communicated between the gas inlet channel 2 and the gas outlet channel 4, a differential pressure sensor 6 used for detecting air pressure difference is connected with the gas outlet channel through another pipeline, the bypass channel 5 is a capillary tube or a capillary hole is formed in the bypass channel 5 so as to limit the flow, a control signal input end of the main channel electromagnetic valve 3 and a detection signal output end of the differential pressure sensor 6 are respectively and electrically connected with the main control module 1, and the parameter setting method comprises the following steps:
step B1, connecting the input end of the device with an air source, sealing or connecting the output end of the device with a non-air-release pipeline, then opening the air source, controlling the main channel electromagnetic valve 3 to be switched on by the main control module 1, detecting the air pressure difference between the air inlet channel 2 and the air outlet channel 4 by the main control module 1 through the pressure difference sensor 6 after a period of time, recording the air pressure difference as PA, and closing the air source after the air source is finished;
step B2, the output end of the device is replaced and connected to a standard leak hole, the flow L of the standard leak hole is known, then the air source is opened, the main control module 1 controls the main channel electromagnetic valve 3 to be switched on, so that the air source gas is respectively output backwards through the main channel electromagnetic valve 3 and the bypass channel 5, after a period of time, the main control module 1 controls the main channel electromagnetic valve 3 to be switched off, so that the air source gas is only output backwards through the bypass channel 5, then the main control module 1 detects the air pressure difference between the air inlet channel 2 and the air outlet channel 4 through the pressure difference sensor 6 and records the air pressure difference as PB, and finally, the airAnd obtaining a proportional parameter K of the flow and the air pressure difference, and closing the air source after the proportional parameter K is completed.
In the parameter setting method of the gas leakage detecting apparatus as described above, in step B1, when data of the pressure difference PA is sampled, the data is sampled for a plurality of times and then averaged to obtain the average value of the pressure difference PA, and in step B2, when data of the pressure difference PB is sampled, the data is sampled for a plurality of times and then averaged to obtain the average value of the pressure difference PB, and then the average value is obtained
In the parameter setting method of the gas leakage detection device, in the device, the front end of the intake passage 2 is provided with the front end electromagnetic valve 7, the control signal input end of the front end electromagnetic valve 7 is electrically connected with the main control module 1, and the parameter setting method further includes step B3, when the gas source is not used, the main control module 1 controls the front end electromagnetic valve 7 to close.
Compared with the prior art, the invention has the beneficial effects that:
1. the device is provided with the air inlet channel and the air outlet channel, so that the device is convenient to connect between an air source and a detected pipeline for detecting air leakage, and the device is convenient to apply if being connected in series on a gas pipeline of a gas water heater/a gas stove; in the parameter setting method of the scheme, when the output end of the detection device is not deflated in the step A, the air pressure difference PA between the air inlet channel and the air outlet channel is convenient to correct the actual detection error of the pressure difference sensor through PB-PA when the proportional parameter K is calculated subsequently, and in the step B2, the main control module needs to control the connection and disconnection of the electromagnetic valve of the main channel in sequence, if the detected pipeline leaks air and a bypass channel is not arranged to supplement and output the air to the air outlet channel, the air pressure difference between the air inlet channel and the air outlet channel is larger and larger along with time, and the detection result of the pressure difference sensor cannot correspond to the flow L of a standard leak hole, the bypass channel plays a role in supplementing gas leakage at the output end so as to enable the pressure difference sensor to detect the pressure difference PB between the gas inlet channel and the gas outlet channel to correspond to the flow L of the standard leak hole, and the bypass channel has prominent substantive characteristics and remarkable progress.
2. In step B1, when sampling the data of the pressure difference PA, averaging the data after sampling for several times to obtain an average value of the pressure difference PA, in step B2, when sampling the data of the pressure difference PB, averaging the data after sampling for several times to obtain an average value of the pressure difference PB, and then carrying out the following stepsWhich is advantageous for reducing detection errors of the differential pressure sensor.
3. In the device, the front end of the air inlet channel is provided with a front end electromagnetic valve, the control signal input end of the front end electromagnetic valve is electrically connected with the main control module, the parameter setting method further comprises a step B3, and when an air source is not used, the main control module controls the front end electromagnetic valve to be closed, so that the actual safer control is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a gas leakage detection device in the present application.
Detailed Description
The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1, a parameter setting method of a gas leakage detection device includes a main control module 1, a sequentially connected gas inlet channel 2, a main channel solenoid valve 3, and a gas outlet channel 4 for externally connecting a detected pipeline, a bypass channel 5 is communicated between the gas inlet channel 2 and the gas outlet channel 4, and a differential pressure sensor 6 for detecting a pressure difference is connected to the other pipeline, the bypass channel 5 is a capillary tube or a capillary hole is arranged in the bypass channel 5 so as to limit a flow rate, a control signal input end of the main channel solenoid valve 3 and a detection signal output end of the differential pressure sensor 6 are respectively electrically connected to the main control module 1, and the parameter setting method includes the following steps:
step B1, connecting the input end of the device with an air source, sealing or connecting the output end of the device with a non-air-release pipeline, then opening the air source, controlling the main channel electromagnetic valve 3 to be switched on by the main control module 1, detecting the air pressure difference between the air inlet channel 2 and the air outlet channel 4 by the main control module 1 through the pressure difference sensor 6 after a period of time, recording the air pressure difference as PA, and closing the air source after the air source is finished;
step B2, the output end of the device is replaced and connected to a standard leak hole, the flow L of the standard leak hole is known, then the air source is opened, the main control module 1 controls the main channel electromagnetic valve 3 to be switched on, and the air source air is enabled to flow to the main channel electromagnetic valve 3 and the bypass channel 5 respectivelyAnd (2) outputting the gas, wherein the main control module 1 controls the main channel electromagnetic valve 3 to be closed after a period of time, so that the gas source gas is output backwards only through the bypass channel 5, then the main control module 1 detects the pressure difference between the gas inlet channel 2 and the gas outlet channel 4 through the pressure difference sensor 6 and records the pressure difference as PB, and finally, the main control module has
And obtaining a proportional parameter K of the flow and the air pressure difference, and closing the air source after the proportional parameter K is completed.
As mentioned above, the device is provided with the air inlet channel 2 and the air outlet channel 4, so that the device is convenient to connect between an air source and a detected pipeline for detecting air leakage, and is convenient to apply if being connected in series on a gas pipeline of a gas water heater/a gas stove; in the parameter setting method, when the output end of the detection device is not deflated in the step A, the pressure difference PA between the air inlet channel 2 and the air outlet channel 4 is convenient to correct the actual detection error of the pressure difference sensor 6 through PB-PA when the proportional parameter K is calculated subsequently, and in the step B2, the main control module 1 needs to control the on and off of the main channel electromagnetic valve 3 in sequence, if the detected pipeline leaks gas and the bypass channel 5 is not arranged to supplement and output the gas to the air outlet channel 4, the pressure difference between the air inlet channel 2 and the air outlet channel 4 is larger and larger along with the time, and the detection result of the pressure difference sensor 6 cannot correspond to the flow L of a standard leak hole, the bypass channel 5 of the scheme has the function of supplementing the gas leakage at the output end, so that the pressure difference PB detected by the pressure difference sensor 6 between the gas inlet channel 2 and the gas outlet channel 4 can correspond to the flow L of the standard leak hole, and the method has prominent substantive characteristics and remarkable progress.
As described above, the parameters are set so that the subsequent gas leakage detection device can calculate the flow rate l (x) of the measured pipeline by measuring the pressure difference p (x) between the inlet channel 2 and the outlet channel 4 when the main channel solenoid valve 3 is turned off, where l (x) is K (p (x)).
As described above, in the specific implementation, in step B1, when data sampling of the differential pressure PA is performed, the data is sampled for several times and then averaged to obtain the average value of the differential pressure PA, and in step B2, when data sampling of the differential pressure PB is performed, the data is sampled for several times and then averaged to obtain the average value of the differential pressure PB, and then there is a step B
Which is advantageous in reducing the detection error of the differential pressure sensor 6.
As described above, in the specific implementation, in the apparatus, the front end of the intake channel 2 is provided with the front end electromagnetic valve 7, the control signal input end of the front end electromagnetic valve 7 is electrically connected to the main control module 1, and the parameter setting method further includes step B3, when the air source is not used, the main control module 1 controls the front end electromagnetic valve 7 to close, so as to facilitate actual safer control.
As described above, the present disclosure is directed to a method for setting parameters of a gas leakage detection apparatus, and all technical solutions that are the same as or similar to the present disclosure should be considered as falling within the scope of the present disclosure.
Claims (3)
1. A parameter setting method of a gas leakage detection device is characterized by comprising a main control module (1), an air inlet channel (2) connected in sequence, a main channel electromagnetic valve (3) and an air outlet channel (4) used for being externally connected with a detected pipeline, wherein a bypass channel (5) is communicated between the air inlet channel (2) and the air outlet channel (4) and is connected with a differential pressure sensor (6) used for detecting air pressure differential pressure through another pipeline, capillary holes are formed in the bypass channel (5) which is a capillary tube or the bypass channel (5) so as to limit the flow, a control signal input end of the main channel electromagnetic valve (3) and a detection signal output end of the differential pressure sensor (6) are respectively and electrically connected with the main control module (1), and the parameter setting method comprises the following steps:
step B1, connecting the input end of the device with an air source, sealing or connecting the output end of the device with a non-air-release pipeline, then opening the air source, controlling the main channel electromagnetic valve (3) to be switched on by the main control module (1), detecting the air pressure difference between the air inlet channel (2) and the air outlet channel (4) by the main control module (1) through the pressure difference sensor (6) after a period of time, recording the air pressure difference as PA, and closing the air source after the air source is completed;
step B2, the output end of the device is replaced and connected to be a standard leak hole, the flow L of the standard leak hole is known, then an air source is opened, a main control module (1) controls a main channel electromagnetic valve (3) to be switched on, so that air source gas is respectively output backwards through the main channel electromagnetic valve (3) and a bypass channel (5), after a period of time, the main control module (1) controls the main channel electromagnetic valve (3) to be closed, so that the air source gas is only output backwards through the bypass channel (5), then the main control module (1) detects the air pressure difference between an air inlet channel (2) and an air outlet channel (4) through a pressure difference sensor (6) and records the air pressure difference as PB, and finally, the air source gasAnd obtaining a proportional parameter K of the flow and the air pressure difference, and closing the air source after the proportional parameter K is completed.
2. The method of claim 1, wherein in step B1, the data is sampled several times and then averaged to obtain the average value of the differential pressure PA when the data of the differential pressure PA is sampled, and in step B2, the data is sampled several times and then averaged to obtain the average value of the differential pressure PB when the data of the differential pressure PB is sampled, and then the average value of the differential pressure PB is obtained
3. The parameter setting method of a gas leak detecting apparatus according to claim 1 or 2, wherein a front end solenoid valve (7) is provided at a front end of the inlet passage (2), a control signal input terminal of the front end solenoid valve (7) is electrically connected to the main control module (1), and the parameter setting method further comprises a step B3, when the gas source is not used, the main control module (1) controls the front end solenoid valve (7) to close.
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| JPS56137240A (en) * | 1980-03-31 | 1981-10-27 | Yokogawa Hokushin Electric Corp | Detecting system of water-leaking location |
| CN1138085C (en) * | 1999-05-10 | 2004-02-11 | 北京昊科航科技有限责任公司 | Method and device for monitoring and locating leakage of fluid delivering pipeline |
| JP4022752B2 (en) * | 2002-11-11 | 2007-12-19 | Ｓｍｃ株式会社 | Leakage flow measurement method |
| CN102338137A (en) * | 2011-08-25 | 2012-02-01 | 中联重科股份有限公司 | Method for detecting hydraulic valve, controller and device, method for detecting malfunction of hydraulic loop and device and malfunction processing system |
| CN202938025U (en) * | 2012-12-10 | 2013-05-15 | 中国能源建设集团广东省电力设计研究院 | Gas leakage detection device |
| CN103423597A (en) * | 2013-08-23 | 2013-12-04 | 潘兴科 | Residence gas leakage detection method and leakage prevention device |
| CN203486150U (en) * | 2013-09-02 | 2014-03-19 | 成都飞亚航空设备应用研究所有限公司 | Air leakage tester |
| CN204756457U (en) * | 2015-06-26 | 2015-11-11 | 天津市海王星海上工程技术股份有限公司 | Ocean hose monitoring devices on throne |
| CN205191220U (en) * | 2015-11-04 | 2016-04-27 | 内蒙古伊泰煤制油有限责任公司 | Instrument air supply system |
| CN206330712U (en) * | 2016-11-28 | 2017-07-14 | 亚得克测量仪器（上海）有限公司 | Flow-type leak detector |
| 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 |
| CN107218516B (en) * | 2017-07-19 | 2018-12-21 | 中国水利水电科学研究院 | A kind of water delivery in pipeline system multiple spot minute leakage detection device and method |
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Effective date of registration: 20200820 Address after: 528400 No. 42, South 1, Industrial Avenue, Xiaolan Town, Guangdong, Zhongshan Patentee after: Changqing thermal energy technology (Zhongshan) Co., Ltd Address before: 528400, No. 42, South Avenue, Xiaolan Town, Guangdong, Zhongshan Patentee before: CHANT HEAT ENERGY SCIENCE & TECHNOLOGY (ZHONGSHAN) Co.,Ltd. |