CN114384144A - Calibration device and method of alarm instrument for detecting sulfur hexafluoride in power distribution room - Google Patents
Calibration device and method of alarm instrument for detecting sulfur hexafluoride in power distribution room Download PDFInfo
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- CN114384144A CN114384144A CN202111239471.4A CN202111239471A CN114384144A CN 114384144 A CN114384144 A CN 114384144A CN 202111239471 A CN202111239471 A CN 202111239471A CN 114384144 A CN114384144 A CN 114384144A
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 92
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 91
- 238000009826 distribution Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000003860 storage Methods 0.000 claims description 24
- 238000012795 verification Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003085 diluting agent Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000004164 analytical calibration Methods 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 159
- 230000008569 process Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Abstract
The invention relates to the technical field of sulfur hexafluoride gas, and discloses a calibration device and a calibration method of an alarm instrument for detecting sulfur hexafluoride in a power distribution room. The calibration device is small, light and portable, the volume of the calibration device is greatly reduced in the gas distribution device part, the complex operation flow of dynamic gas distribution is simplified, the calibration device is flexible to use, a detection alarm instrument does not need to be detached, the terminal has strong adaptive capacity, the calibration device can adapt to instrument calibration application of different manufacturers in the field environment, complex work of detaching the sensor is omitted, and the risk of vacant detection is caused by detaching the sensor.
Description
Technical Field
The invention relates to the technical field of sulfur hexafluoride gas, in particular to a calibration device and method of an alarm instrument for detecting sulfur hexafluoride in a power distribution room.
Background
The sulfur hexafluoride detection alarm instrument is widely applied to the fields of using and researching sulfur hexafluoride gas such as electric power, power grids and metallurgy, and is used for analyzing, detecting leakage or alarming the concentration of the sulfur hexafluoride gas. The detection principle generally comprises an ultraviolet ionization type, a negative voltage corona type, a local vacuum type and an electronic capture type, an instrument mainly comprises a light source, an ionization, a gas circuit, a circuit and other systems, according to relevant regulations such as electric industry safety regulations, DL/T639-1997 sulfur hexafluoride electrical equipment operation, test and overhaul personnel safety protection rules and GB12358-2006 general technical requirements for environment gas detection alarm instruments in operation places, an online sulfur hexafluoride gas-O2 leakage monitoring alarm instrument is required to be installed in an indoor sulfur hexafluoride gas electrical equipment work place, when the concentration of sulfur hexafluoride in the air exceeds 1000 mu L/L or the oxygen content is lower than 18%, the instrument sends out an alarm signal to remind the worker to take safety measures, and simultaneously, the system automatically starts an exhaust facility to reduce the content of the sulfur hexafluoride gas in the environment air, the personal safety of workers entering the room is guaranteed, and the monitoring instruments need to be periodically checked in order to guarantee the operational reliability of the field leakage monitoring instruments. Relevant laws and regulations in China also stipulate the verification or check of the products, the re-calibration time interval of the sulfur hexafluoride detection alarm instrument is determined to be one year according to the guidance of 2 standards of JBT10893-2008 < sulfur hexafluoride environment monitoring system of high-voltage combined electrical appliance distribution room > and JJF1263-2010 < calibration standard of sulfur hexafluoride detection alarm instrument > formulated by the national instrument component quality supervision and inspection center and the organization of China's institute of metrology science, and the check of the sulfur hexafluoride detection alarm instrument in the power industry mainly adopts the following method, so that the instrument is sent to a laboratory and is communicated with an intelligent verification platform of the gas instrument to perform point-by-point check. The intelligent verification platform for the gas instrument realizes the accurate verification of any measurement value in the measuring range of the detection alarm instrument to be detected by configuring the flow range, the number of components and the dilution multiple of sulfur hexafluoride gas, and the linear error can be controlled within 5 percent.
Practical operation experience shows that the scheme of regularly sending the sulfur hexafluoride detection alarm instrument of the power distribution room to a laboratory for checking has the following two disadvantages: (1) the method is characterized in that the operating sulfur hexafluoride detection alarm instrument is detached and transported in the middle, the manual workload is large, meanwhile, due to the fact that a sensing unit is not arranged during verification, the environment safety of an indoor transformer substation is potentially dangerous, (2) the laboratory sensor has long verification period and high calibration cost, the maintenance cost of the sulfur hexafluoride detection alarm instrument product is increased, the comprehensive cost is increased, and the economic benefit is greatly reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the calibration device and the calibration method of the alarm for detecting the sulfur hexafluoride in the power distribution room, which have the advantages of simplifying the complicated operation flow of dynamic gas distribution, and being flexible in use, efficient and portable, and solve the problems of complicated work, potential danger and high maintenance cost of the device.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a calibration device of an alarm instrument for detecting sulfur hexafluoride in a power distribution room comprises a sulfur hexafluoride gas storage steel cylinder, an air inlet valve is arranged on the right side of the sulfur hexafluoride gas storage steel cylinder, a pressure reducing valve is arranged on the right side of the air inlet valve, a flowmeter is arranged on the right side of the pressure reducing valve, a two-way valve is arranged on the right side of the flowmeter, the lower end of the two-way valve is fixedly connected with a gas pipeline, the right end of the gas pipeline is fixedly connected with a pipeline and a gas hood self-sealing quick connector, the right side of the pipeline and the gas hood self-sealing quick connector is fixedly connected with a gas hood, the upper end of the two-way valve is fixedly connected with a buffer gas chamber, the right end of the buffer air chamber is fixedly connected with an air outlet valve, the right side of the air outlet valve is fixedly provided with a vacuum pump, the right side of the vacuum pump is provided with a gas storage bottle, and the front of the buffer gas chamber is provided with a pressure sensor.
Preferably, the sulfur hexafluoride gas generation module generates sulfur hexafluoride gas with various concentrations required for calibration, and the sulfur hexafluoride gas is required to be prepared as standard sulfur hexafluoride gas and diluent gas.
Preferably, the calibration device stores the sulfur hexafluoride gas with the components in a steel cylinder, sequentially passes through all parts on a gas pipeline, enters the buffer gas chamber and the gas hood, and calibrates the sulfur hexafluoride detection alarm instrument after gas mixing.
Preferably, the method comprises the following steps:
s: the sulfur hexafluoride gas stored in the sulfur hexafluoride gas storage steel cylinder is the sulfur hexafluoride standard gas with the prepared components;
s: the standard gas sequentially flows through a pressure reducing valve through a gas pipeline, so that the pressure of the pipeline is reduced;
s: standard gas flows to the two-way valve, and the gas circuit is divided into two parts: one part of the gas flows into the buffer gas chamber and reaches the gas outlet valve;
s: the other part flows into the gas hood through a gas pipeline and is used for creating a checking environment of the sulfur hexafluoride detection alarm instrument;
s: the buffer air chamber is internally provided with a standard sulfur hexafluoride detection alarm instrument which is checked in a laboratory, the output end of the buffer air chamber can be connected to a background system, and the response output can be directly obtained by the background system;
s: after the checking is finished, the gas used for checking in the device is exhausted, the gas outlet valve is opened, the vacuum pump is started, and the sulfur hexafluoride gas in the device is exhausted into the gas storage cylinder.
Preferably, the checking device comprises a gas distribution device part, a checking device part and a control part.
Preferably, in the gas distribution device part, a multi-component dynamic gas distribution system of the intelligent calibration platform of the gas instrument is replaced by standard gas with a distributed component, and the multi-component dynamic gas distribution system of the intelligent calibration platform of the gas instrument is replaced by the standard gas with a distributed component, so that the volume of the calibration device is greatly reduced, and the complicated operation flow of dynamic gas distribution is simplified; the checking device mainly comprises a buffer air chamber and a checking air hood, the buffer air chamber is communicated with the air hood through a two-way valve, the expansion length and the package size of the air hood can be flexibly adjusted, the flexible checking that the on-site sulfur hexafluoride detection alarm instrument does not disassemble the package on line can be met, the complex work of disassembling the sensor and the risk of vacant detection caused by disassembling the sensor are eliminated; the control part works by comprising pressure reduction valve gas on-off control matched with a standard gas bottle, buffer gas chamber and standard gas bottle gas on-off control and gas path on-off control of the buffer gas chamber and a vacuum pump side, and the upper computer dynamically controls the on-off of the electromagnetic valve according to a checking process and a response value of a gas chamber pressure sensor, so that high-efficiency and convenient gas path working flow control is realized.
Compared with the prior art, the invention provides the verification device and the verification method of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room, and the verification device and the verification method have the following beneficial effects:
1. the calibration device and the calibration method of the alarm for detecting the sulfur hexafluoride in the power distribution room are small, light and portable, and a multi-component dynamic gas distribution system of an intelligent calibration platform of a standard gas replacement gas instrument with distributed components is used in a gas distribution device part, so that the volume of the calibration device is greatly reduced, and the complicated operation flow of dynamic gas distribution is simplified.
2. According to the calibration device and the calibration method of the alarm for detecting the sulfur hexafluoride in the power distribution room, the calibration device is flexible to use, the detection alarm does not need to be disassembled, the terminal has strong adaptability, the calibration device can adapt to the instrument calibration application of different manufacturers in the field environment, the flexible length and the package size can be flexibly adjusted by the calibration gas hood, the flexible calibration of the on-line non-disassembly package of the field sulfur hexafluoride detection alarm is met, the tedious work of disassembling a sensor and the risk of empty detection caused by disassembling the sensor are eliminated.
3. The calibration device and method of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room are effective and portable in calibration process. The upper computer dynamically controls the on-off of the electromagnetic valve according to the checking process and the response value of the air chamber pressure sensor, and efficient and convenient air path working process control is achieved.
4. The calibration device and the calibration method of the alarm for detecting the sulfur hexafluoride in the power distribution room have the advantages that the gas path distribution scheme designed by three-stage segmentation of the standard gas, the buffer gas chamber and the gas hood realizes the small size, light weight and portability of the calibration device, and simultaneously guarantees the calibration of the core function of normally triggering the alarm function of the alarm for detecting the sulfur hexafluoride; the technical idea of software automation process control and high-efficiency implementation of the calibration process is realized by controlling the on-off of gas through a solenoid valve, the control part of the solenoid valve comprises the on-off control of the pressure reducing valve gas of a standard gas cylinder, the on-off control of the gas circuit of a buffer gas chamber and the standard gas cylinder and the on-off control of the gas circuit of the buffer gas chamber and a vacuum pump side, and an upper computer dynamically controls the on-off of the solenoid valve according to the appointed calibration process, so that the high-efficiency operation of the whole gas circuit is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an SF6 gas field convenient checking device of the invention.
Wherein: 1. a sulfur hexafluoride gas storage cylinder; 2. an intake valve; 3. a pressure reducing valve; 4. a flow meter; 5. a two-way valve; 6. a gas line; 7. the pipeline and the gas hood self-sealing quick connector; 8. a gas hood; 9. a buffer air chamber; 10. an air outlet valve; 11. a gas storage cylinder; 12. a vacuum pump; 13. a pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a calibration device of an alarm for detecting sulfur hexafluoride in a power distribution room comprises a sulfur hexafluoride gas storage steel cylinder 1, an air inlet valve 2 is arranged on the right side of the sulfur hexafluoride gas storage steel cylinder 1, a pressure reducing valve 3 is arranged on the right side of the air inlet valve 2, a flow meter 4 is arranged on the right side of the pressure reducing valve 3, a two-way valve 5 is arranged on the right side of the flow meter 4, a gas pipeline 6 is fixedly connected to the lower end of the two-way valve 5, a pipeline and a gas hood self-sealing quick connector 7 are fixedly connected to the right end of the gas pipeline 6, a gas hood 8 is fixedly connected to the right side of the pipeline and the gas hood self-sealing quick connector 7, a buffer gas chamber 9 is fixedly connected to the upper end of the two-way valve 5, an air outlet valve 10 is fixedly connected to the right end of the buffer gas chamber 9, a vacuum pump 12 is fixedly mounted to the right side of the air outlet valve 10, a gas storage cylinder 11 is arranged on the right side of the vacuum pump 12, and a gas storage cylinder 13 is arranged in front of the buffer gas storage chamber 9.
Specifically, the sulfur hexafluoride gas generation module generates sulfur hexafluoride gas with various concentrations required for calibration, and requires sulfur hexafluoride standard gas and diluent gas for gas preparation.
Specifically, the calibration device comprises a sulfur hexafluoride gas storage steel cylinder 1 with well-distributed components, a buffer gas chamber 9 and a gas hood 8 which are sequentially arranged through various components on a gas pipeline, and a sulfur hexafluoride detection alarm instrument is calibrated after gas mixing.
Specifically, the method comprises the following steps:
s1: the sulfur hexafluoride gas stored in the sulfur hexafluoride gas storage steel cylinder 1 is the sulfur hexafluoride standard gas with the prepared components;
s2: the standard gas flows through the pressure reducing valves 3 in sequence through the gas pipelines 6, and the pressure of the pipelines is reduced;
s3: the standard gas flows to the two-way valve 5, and the gas path is divided into two parts: a part of the gas flows into the buffer gas chamber 9 and reaches the gas outlet valve 10;
s4: the other part flows into the gas hood 8 through a gas pipeline 6 for creating a checking environment of the sulfur hexafluoride detection alarm instrument;
s5: a standard sulfur hexafluoride detection alarm instrument which is checked in a laboratory is arranged in the buffer air chamber 9, the output end of the buffer air chamber can be connected to a background system, and the corresponding output background system can be directly obtained;
s6: after the checking is finished, the gas for checking in the device is exhausted, the gas outlet valve 10 is opened, the vacuum pump 12 is started, and the sulfur hexafluoride gas in the device is exhausted into the gas storage bottle 11.
Specifically, the checking device comprises a gas distribution device part, a checking device part and a control part.
Specifically, the gas distribution device part uses a multi-component dynamic gas distribution system of a standard gas replacement gas instrument intelligent verification platform with distributed components, and uses the multi-component dynamic gas distribution system of the standard gas replacement gas instrument intelligent verification platform with distributed components, so that the size of the calibration device is greatly reduced, and the complicated operation flow of dynamic gas distribution is simplified; the checking device mainly comprises a buffer air chamber 9 and a checking air hood 8, the buffer air chamber 9 is communicated with the air hood 8 through a two-way valve 5, the expansion length and the package size of the air hood 8 can be flexibly adjusted, flexible checking that a package is not disassembled on line of the on-site sulfur hexafluoride detection alarm can be met, complex work of disassembling a sensor and risk of vacant detection caused by disassembling the sensor are eliminated; the control part works by comprising 3-door gas on-off control of a pressure reducing valve matched with a standard gas bottle, on-off control of the buffer gas chamber 9 and the standard gas bottle gas path and on-off control of the buffer gas chamber 9 and the vacuum pump 12 side gas path, and the upper computer dynamically controls the on-off of the electromagnetic valve according to the checking process and the response value of the gas chamber pressure sensor, so that efficient and convenient gas path working flow control is realized.
The working principle is as follows: when the calibration device and the calibration method of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room are used, the sulfur hexafluoride standard gas which is prepared with components is stored in the sulfur hexafluoride gas storage steel cylinder 1, the standard gas sequentially flows through the pressure reducing valve 3 through the gas pipeline 6, the pressure of the pipeline is weakened, the standard gas flows to the two-way valve 5, and the gas circuit is divided into two parts: one part flows into a buffer air chamber 9 and reaches an air outlet valve 10, the other part flows into an air hood 8 through a gas pipeline 6, the check environment of the sulfur hexafluoride detection alarm is created, the buffer air chamber 9 is internally provided with a standard sulfur hexafluoride detection alarm which is checked in a laboratory, the output end of the standard sulfur hexafluoride detection alarm can be connected to a background system, the corresponding output background system can be directly obtained, after the check is finished, the gas for checking in the device is exhausted, the air outlet valve 10 is opened, a vacuum pump 12 is started, the sulfur hexafluoride gas in the device is exhausted into a gas storage bottle 11, the check device enters the buffer air chamber 9 and the air hood 8 through all parts on the gas pipeline in a matched sulfur hexafluoride gas storage steel bottle 1, and the sulfur hexafluoride detection alarm is calibrated after gas mixing.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a distribution room sulfur hexafluoride detects calibration equipment with alarm instrument, includes sulfur hexafluoride gas storage steel bottle (1), its characterized in that: the right side of the sulfur hexafluoride gas storage steel cylinder (1) is provided with an air inlet valve (2), the right side of the air inlet valve (2) is provided with a pressure reducing valve (3), the right side of the pressure reducing valve (3) is provided with a flowmeter (4), the right side of the flowmeter (4) is provided with a two-way valve (5), the lower end of the two-way valve (5) is fixedly connected with a gas pipeline (6), the right end of the gas pipeline (6) is fixedly connected with a pipeline and a gas hood self-sealing quick-connection joint (7), the right side of the pipeline and the gas hood self-sealing quick-connection joint (7) is fixedly connected with a gas hood (8), the upper end of the two-way valve (5) is fixedly connected with a buffer gas chamber (9), the right end of the buffer gas chamber (9) is fixedly connected with an air outlet valve (10), the right side of the air outlet valve (10) is fixedly provided with a vacuum pump (12), the right side of the vacuum pump (12) is provided with a gas storage cylinder (11), and a pressure sensor (13) is arranged in front of the buffer air chamber (9).
2. The verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room, according to claim 1, is characterized in that: the sulfur hexafluoride gas generation module generates sulfur hexafluoride gas with various concentrations required by calibration, and requires standard sulfur hexafluoride gas and diluent gas for gas preparation.
3. The verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room according to claim 1, wherein the verification method of the verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room is provided, and is characterized in that: the calibration device comprises a sulfur hexafluoride gas storage steel cylinder (1) with prepared components, a buffer gas chamber (9) and a gas hood (8) which are sequentially arranged through parts on a gas pipeline, and a sulfur hexafluoride detection alarm instrument is calibrated after gas mixing.
4. The verification method of the verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room, according to claim 3, is characterized in that: comprises the following steps:
s1: the sulfur hexafluoride gas stored in the sulfur hexafluoride gas storage steel cylinder (1) is the sulfur hexafluoride standard gas with the prepared components;
s2: the standard gas sequentially flows through a pressure reducing valve (3) through a gas pipeline 6, and the pressure of the pipeline is reduced;
s3: standard gas flows to two-way valve (5), and the gas circuit is divided into two parts: a part of the gas flows into the buffer gas chamber (9) and reaches the gas outlet valve (10);
s4: the other part flows into the gas hood (8) through a gas pipeline (6) for creating a checking environment of the sulfur hexafluoride detection alarm instrument;
s5: the buffer air chamber (9) is internally provided with a standard sulfur hexafluoride detection alarm instrument which is checked in a laboratory, the output end of the buffer air chamber can be connected to a background system, and a corresponding output background system can be directly obtained;
s6: after the checking is finished, the gas used for checking in the device is exhausted, the gas outlet valve (10) is opened, the vacuum pump (12) is started, and the sulfur hexafluoride gas in the device is exhausted into the gas storage bottle (11).
5. The verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room, according to claim 1, is characterized in that: the checking device comprises a gas distribution device part, a checking device part and a control part.
6. The verification device of the alarm instrument for detecting the sulfur hexafluoride in the power distribution room, according to claim 1, is characterized in that: the gas distribution device part uses a standard gas with distributed components to replace a multi-component dynamic gas distribution system of an intelligent verification platform of a gas instrument; the checking device mainly comprises a buffer air chamber (9) and a checking air hood (8); the control part works by comprising a pressure reducing valve (3) matched with a standard gas bottle, gas on-off control of a buffer gas chamber (9) and a gas path of the standard gas bottle and gas path on-off control of the buffer gas chamber (9) and a vacuum pump (12).
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| CN209148638U (en) * | 2018-09-29 | 2019-07-23 | 无锡安润威电子科技有限公司 | Remote testing calibrating installation |
| CN209168384U (en) * | 2019-01-08 | 2019-07-26 | 烟台因卓仪表科技有限公司 | The calibrating of multichannel flammable gas alarm and calibrating installation |
| CN209992621U (en) * | 2019-05-20 | 2020-01-24 | 上海昌鹭智能技术有限公司 | SF6 density is calibration equipment for relay |
| CN110849946A (en) * | 2019-11-04 | 2020-02-28 | 苏州热工研究院有限公司 | Calibration device and calibration method for oxygen detection alarm |
| CN111473921A (en) * | 2020-04-16 | 2020-07-31 | 国网湖南省电力有限公司 | Detection system of sulfur hexafluoride leakage alarm device |
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