CN110794089A - Rapid detector and method for gas marker decomposition products after SF6 equipment failure - Google Patents
Rapid detector and method for gas marker decomposition products after SF6 equipment failure Download PDFInfo
- Publication number
- CN110794089A CN110794089A CN201911005281.9A CN201911005281A CN110794089A CN 110794089 A CN110794089 A CN 110794089A CN 201911005281 A CN201911005281 A CN 201911005281A CN 110794089 A CN110794089 A CN 110794089A
- Authority
- CN
- China
- Prior art keywords
- gas
- sensor
- quick plug
- detection
- valve
- 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
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003550 marker Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 114
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 92
- 239000000047 product Substances 0.000 description 31
- 230000008439 repair process Effects 0.000 description 9
- 238000011084 recovery Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000012491 analyte Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009298 carbon filtering Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
Abstract
The invention discloses a rapid detector and a method for gas marker decomposition products after SF6 equipment failure, wherein the detector comprises: the connector combination comprises multiple types of connectors connected with SF6 equipment, and each multiple type of connector is connected with a quick plug connector nut; the detection host is used for connecting the air inlet quick plug connector male and the quick plug connector female, the H2S sensor and the SO2 sensor are respectively used for detecting H2S gas and SO2 gas, and the single chip microcomputer is used for processing the measurement data of the H2S sensor and the SO2 sensor and displaying the measurement result on the display screen; and the filtering and adsorbing device is used for treating the tail gas. The invention improves the quick response capability of the SF6 equipment fault site detection positioning work and improves the safety of the SF6 equipment fault site detection work.
Description
Technical Field
The invention belongs to the technical field of electric power safety production, and particularly relates to a detection instrument for rapid fault point fixing and fault type analysis in SF6 equipment first-aid repair operation.
Background
In recent years, as the size of substations is gradually enlarged and the number of SF6 substation equipment is gradually increased, the number of SF6 equipment faults is also increased. Meanwhile, the requirement on power supply reliability is higher and higher, and the urgency of emergency repair work is higher and higher. SF6 gas insulated switchgear, GIS for short, has been adopted on a large scale in recent years. At the present stage, the large sensor set type SF6 decomposition product detection device can adapt to daily SF6 equipment state detection work (suitable for normal operation of equipment or when or after the occurrence of extremely small discharge hidden danger). But there is a certain drawback in the quick detection and location process of the fault when the SF6 equipment is in fault. H2S and SO2 are main characteristic components decomposed when the SF6 equipment fails, and the content of H2S and SO2 in the equipment in normal operation is very low. However, once a fault occurs, SF6 gas is decomposed under the action of the electric arc and reacts with H, O elements inside equipment materials to generate HS2 and SO2, SO that marked decomposition products H2S and SO2 are greatly increased. When the adsorbent is not adsorbed in a long-time device, the numerical value can reach more than hundreds uL/L in a short time and even can reach more than 1000uL/L in some cases. High levels of SF6 failure can result in contamination of the instrumentation. The large-scale sensor set type SF6 decomposition product detection device is easy to pollute in the detection process and poor in recovery capability, and the detection capability can be recovered only by flushing new SF6 gas for a long time. In addition, GIS equipment is very dense, circuit equipment is wrapped in an SF6 air chamber and cannot be seen, and positioning of a fault air chamber and prejudgment of fault types are of great significance to emergency maintenance work.
1. SF6 device detection of presence
The SF6 analyte detection device at this stage has two types. A large sensor set type SF6 decomposition product detection device is provided, and an instrument is approximately the size of a computer host. When carried, the utility model is put in a proper ABS plastic shockproof box. Before working, the power panel, the long gas pipeline, the joint box, the gas recovery device and related tools must be carried at the same time. Before use, a detection system is constructed on site, and a power supply, a gas pipeline and a corresponding joint of equipment are connected to start detection. Can be detected quantitatively. SF6 analyte detection device of chemisorption reaction formula is through the use of joint pipeline valve and detection with built-in chemical reaction colour development thing glass pipe, does qualitative detection, uses at ordinary times fewest, and the operation is comparatively loaded down with trivial details, does not accomplish the operation of fooling, and the consumptive material still expires easily beyond once only. At present, the SF6 decomposition product detection device accurately detects several characteristic gases such as H2S, SO2, CO and the like.
2. Disadvantages of SF6 decomposition product detection device in use process at present
At the present stage, the large sensor set type SF6 decomposition product detection device can adapt to daily SF6 equipment state detection work. However, there is a certain disadvantage in the quick fault detection and location process when the SF6 equipment fails, which mainly appears in the following five aspects:
the measuring range and the sensitivity of the large sensor set type SF6 decomposer detection device are not suitable for fault detection and positioning when an SF6 device is in fault. The large sensor set type SF6 decomposer detection device is high in detection sensitivity and small in range, and is suitable for detecting whether small hidden dangers exist in equipment or not. The contents of H2S and SO2 in the related procedures of charged detection reach the attention value as long as one item exceeds 1 uL/L. The maximum detection range of the devices H2S and SO2 is 100 uL/L. However, when the SF6 equipment fails, the generated H2S and SO2 are in large quantities, and particularly, when the equipment fails in emergency repair, the decomposition products are not absorbed by the adsorbent in large quantities, SO that the decomposition product value greatly exceeds the detection range of the large sensor set type SF6 decomposition product detection device at the present stage. When the data exceeds the measuring range, the values of various decomposers cannot be correctly displayed, and only one data overrun report can be given when the data is reported. It does not provide good data support for analyzing the types of failures within the device.
Second, large-scale sensor set type SF6 decomposer detection device, equipment pipeline length and high precision of internal sensor are easily polluted by a large amount of decomposers generated by SF6 equipment fault, short-time recovery detection is difficult, and detection can be restarted only after long-time SF6 qualified fresh air flushing or SF6 decomposer detection device replacement. Plus a large set of SF6 devices in the GIS device and fault concealment. This puts a great pressure on the SF6 equipment fault detection and location work in the emergency repair work. Determining where the fault is a prerequisite to handling the fault. The SF6 equipment fault detection location work requires to be fast, accurate and sustainable.
And thirdly, the SF6 equipment is inconvenient to use in the site for breakdown first-aid repair. At the present stage, the large sensor set type SF6 decomposition product detection device is large in size, heavy, inflexible and inconvenient to carry, and long pipelines and cable reels need to be matched for work. And because the whole detection system needs a certain time to be set up, (including a plurality of working contents such as instrument power supply lap joint, instrument start-up preheating, long pipeline release straightening, recovery device lap joint, joint replacement with tools and the like) the work efficiency is not high.
And fourthly, when the SF6 equipment fails, the inside of the equipment can discharge to generate some extremely toxic gases. When the large sensor set type SF6 decomposition product detection device is used at the present stage, the large sensor set type SF6 decomposition product detection device must be matched with an SF6 gas recovery device, and toxic gas can be effectively prevented from leaking to the periphery of detection equipment after SF6 faults. If the SF6 gas recovery device is not provided, the personal health safety of workers such as maintenance tests around the equipment can be threatened.
Fifth, the chemical adsorption reaction type SF6 decomposition product detection device has the disadvantages that the use of a measuring glass tube and a pipeline valve is not simple enough, and the reading of data is inconvenient, so that the field use is inconvenient. In addition, the materials in the relevant measurement glass tube have service life and are disposable consumables. But also only qualitatively.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rapid detector for gas marker decomposers after SF6 equipment failure, and performing equipment failure detection and positioning work in a rapid and quantitative manner.
In order to solve the technical problems, the invention adopts the following technical scheme: a rapid detector for gas marker decomposition products after SF6 equipment failure comprises:
the connector combination comprises multiple types of connectors connected with SF6 equipment, and each multiple type of connector is connected with a quick plug connector nut;
the detection host comprises a detection host shell with a detection cavity, an air inlet quick plug-in connector male and a tail gas quick plug-in connector female, wherein the air inlet quick plug-in connector male and the tail gas quick plug-in connector female are connected with the detection host shell and used for introducing SF6 decomposition product gas, an H2S sensor, an SO2 sensor and a single chip microcomputer are arranged in the detection cavity, a display screen is arranged outside the detection host shell, the H2S sensor and the SO2 sensor are respectively used for detecting H2S gas and SO2 gas, and the single chip microcomputer processes measurement data of the H2S sensor and the SO2 sensor and displays measurement results on the display screen;
the filtering and adsorbing device comprises a filtering and adsorbing device shell with a filtering and adsorbing cavity, a replaceable adsorption activated carbon material arranged in the filtering and adsorbing cavity, and a quick plug-in connector male connected with the filtering and adsorbing device shell and connected with and passing through the filtering and adsorbing cavity, wherein the quick plug-in connector male is connected with the quick plug-in connector female of tail gas.
Preferably, a gas mixing chamber/valve and an active air pump are arranged in the detection cavity, the gas mixing chamber/valve is connected with the air inlet quick plug-in connector and the active air pump through a gas pipeline, and an external air pump is sent into the gas mixing chamber/valve through the active air pump to be mixed with the SF6 decomposition product gas.
Preferably, the detection host further comprises a controllable flow valve for controlling the ratio of the decomposition product gas of SF6 to air.
Preferably, the H2S sensor and the SO2 sensor are connected in parallel to form an air inlet.
Preferably, the H2S sensor is a wide-range H2S sensor or a small-range high-precision H2S sensor, and the SO2 sensor is a wide-range SO2 sensor or a small-range high-precision SO2 sensor.
Preferably, the gas mixing chamber/valve is also connected with a CO sensor in parallel with the H2S sensor and the SO2 sensor.
Preferably, a flow regulating valve is arranged on the upper or downstream side of the inlet quick plug connector for regulating the flow of the entering SF6 decomposition product gas.
Preferably, a quick plug type coarse filter joint is installed on the downstream side of the air inlet quick plug joint male for filtering small and medium particle pollutants.
Preferably, the gas pipeline comprises a polytetrafluoroethylene pipe and a quick plug connector male and a quick plug connector female which are respectively connected to two ends of the polytetrafluoroethylene pipe.
The invention also provides a rapid detection method of the gas marker decomposition products after the SF6 equipment failure, which comprises the following steps:
firstly, an active air pump is in an opening state, air enters a gas mixing chamber/valve through a controllable flow valve through a gas pipeline, and simultaneously detected gas also enters the gas mixing chamber/valve through the controllable flow valve through the gas pipeline;
secondly, rapidly detecting the detected gas through a sensor;
and finally, the detected gas is discharged from a gas outlet of the detection host machine, and the tail gas is collected by a gas collecting device or is treated by a filtering and adsorbing device.
Furthermore, when the detection process of the detected gas is completed, the active air pump starts a powerful mode to pump the outside air into the air mixing chamber/valve and the gas pipeline, and the outside air is filled in the air mixing chamber/valve and the gas pipeline to force the residual detected gas to be discharged.
The technical scheme adopted by the invention has the following beneficial effects:
1. promote SF6 equipment trouble scene detection location work's quick reaction ability:
the SF6 equipment fault occurrence time is short, and the damage to the stability of the power grid is large. Essentially, upon a SF6 equipment failure, equipment blackout service is necessary. The SF6 equipment fault site detection positioning work has a preposed guiding function on the following equipment first-aid repair work. The equipment fault detection and positioning work is done quickly and quantitatively, and the quick response capability of the overhaul work is improved.
2. Improve SF6 equipment trouble scene detection location work's work efficiency:
the connector combination, the detection host computer and the filtration adsorption equipment all can miniaturized design, and the design of simplifying realizes guaranteeing the simplicity that SF6 equipment trouble salvagees the detection operation personnel and use with the instrument of handheld simple joint formula, makes things convenient for the operation personnel to use, has promoted the work efficiency of SF6 equipment trouble spot detection positioning work. The small volume and the constraint of no long pipeline effectively avoid the inconvenience of moving detection of field workers. The pluggable connector simplifies the process of matching the connector of the equipment. The anti-pollution capability in the detection greatly reduces the recovery time of the detection capability after the device is polluted. Simple and foolproof operation without professional detection personnel. Thereby improving the working efficiency.
3. Data intuitiveness of SF6 equipment fault field detection work is improved:
the improvement of the electronic part of the device on the measuring range and the sensitivity realizes the site detection and positioning work of the SF6 equipment fault, which is not suitable for the former SF6 decomposer detector. No longer appears the overrange. Compared with an SF6 decomposition product detector with a chemical formula, the method is simpler and more convenient to operate, and data are more visual.
4. Improve the safety of SF6 equipment trouble scene detection work:
the tail box-type active carbon filtering and adsorbing device has the advantages that the safety of SF6 equipment fault field detection work can be greatly improved according to the characteristics of a lot of toxic gases in SF6 equipment fault equipment, and meanwhile, the convenience of the detection work is not influenced.
5. After the quick plug-in connector of the equipment is connected, a quick plug-in coarse filter connector can be additionally arranged and used for filtering small and medium particle pollutants in a fault air chamber. Preventing irreversible contamination of the device.
6. The existing detection equipment has high precision, large volume, high price, difficult recovery after pollution and long maintenance period of manufacturers. The sensor adopted by the device can be directly purchased on the network, the re-calibration is not needed, the price is low, and the replacement is convenient. Can be used as a kind of advanced test or supplement of the main detection device.
7. The detector is not easy to be polluted due to the large-range sensor, the short pipeline design and the air pump design, and the detection capability can be quickly recovered after the detector is polluted by SF6 fault equipment gas.
The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the construction of the joint assembly of the present invention;
FIG. 3 is a schematic view of a multi-type connector of the present invention placed in a connector sub-box;
FIG. 4 is a diagram illustrating an external structure of the inspection host according to the present invention;
FIG. 5 is a view showing an internal structure of the inspection main unit according to the present invention;
FIG. 6 is a schematic diagram of a control circuit of a single chip in the test host according to the present invention;
FIG. 7 is a diagram of the components of the gas line in the inspection mainframe of the present invention;
FIG. 8 is a view showing the structure of a gas mixing chamber (valve) in the present invention;
FIG. 9 is a flowchart of the host program for detection according to the present invention;
FIG. 10 is a view showing the construction of a filtration and adsorption apparatus according to the present invention.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
Example one
Referring to fig. 1 to 10, a rapid detector for a gas marker decomposition product after a SF6 equipment failure, comprising:
the connector combination 1 comprises multiple types of connectors 11 connected with SF6 equipment, and each multiple type of connector is connected with a quick plug connector female 12;
the detection host machine 2 comprises a detection host machine shell 20 with a detection cavity, an air inlet quick plug-in connector male 201 and a tail gas quick plug-in connector female 202, wherein the air inlet quick plug-in connector male 201 and the tail gas quick plug-in connector female 202 are connected with the detection host machine shell, the air inlet quick plug-in connector male 201 is located at the air inlet position of the detection host machine and is connected with a quick plug-in connector female 12 and used for introducing SF6 decomposition product gas, an H2S sensor 23, an SO2 sensor 24, a single chip microcomputer 28 and a power module 29 are arranged in the detection cavity, a display screen 22 and a power switch 21 are arranged outside the detection host machine shell and used for supplying power to the detection host machine through the power module, the H2S sensor and the SO2 sensor are respectively used for detecting H2S gas and SO2 gas, the single chip microcomputer is used for processing the measurement data of the H2S sensor and the;
the filtering and adsorbing device 3 comprises a filtering and adsorbing device shell 30 with a filtering and adsorbing cavity, a replaceable adsorbing activated carbon material 31 arranged in the filtering and adsorbing cavity, and a quick plug-in connector male 32 connected with the filtering and adsorbing device shell and connected with and passing through the filtering and adsorbing cavity, wherein the quick plug-in connector male 32 is connected with a tail gas quick plug-in connector female 202.
Referring to fig. 2 and 3, the multi-type connector 11 may be of multiple types to realize the matching with different SF6 equipment connectors, and multiple multi-type connectors 11 of different specifications may be placed in the connector small box 10 and used as required in actual use. The multi-type connector is connected with the quick plug connector through threads.
Further, referring to fig. 5, an air mixing chamber/valve 26 and an active air pump 25 are arranged in the detection cavity, the air mixing chamber/valve 26 is connected with the air inlet quick plug connector male 201 and the active air pump 25 through an air pipeline 200, and external air is pumped into the air mixing chamber/valve 26 through the active air pump 25 to be mixed with the decomposition product gas of SF 6.
When the detection process of the gas is completed, the active air pump starts a powerful mode to pump the outside air into the air mixing chamber/valve and the gas pipeline, and the outside air is filled in the air mixing chamber/valve and the gas pipeline to force the residual gas to be detected to be discharged.
Therefore, the sensor can be brought into a necessary aerobic test environment by adopting an active air pump and a gas mixing chamber (valve). After the detection is finished, the interior of the device can be cleaned by air, SO that the corrosion pollution of residual H2S and SO2 to the device is reduced. The method effectively avoids the measured gas from existing in the measuring gas chamber for a long time, not only can ensure the accuracy of the next measurement, but also is beneficial to prolonging the service life of each gas sensor.
Further, the detection host machine further comprises a controllable flow valve 27 for controlling the ratio of the decomposition product gas of SF6 to air. The flow valve can be controlled to automatically adjust the flow rate of the gas to be measured and the air flow rate in proportion, so that the misoperation of the flow valve can be prevented, and the sensor is protected. Meanwhile, manual intervention and adjustment are not needed, and the detection working efficiency is improved. Thus, the controllable flow valve 27 is used to control the ratio of the two gas flows, and at the same time, the sensor is prevented from being irreversibly damaged by the excessive flow. The controllable flow valve 27 may have an electromagnetic shut-off valve at its front end if it does not.
And a flow regulating valve can be arranged on the upper or downstream side of the air inlet quick plug connector. When the concentration of the decomposition product gas of SF6 is measured, the gas to be measured enters from the gas inlet, and the flow of the gas to enter can be adjusted and controlled through a needle type flow valve (which can be set according to actual requirements).
A quick plug-in coarse filter joint can be arranged on the downstream side of the air inlet quick plug-in joint male for filtering small and medium particle pollutants. Preventing irreversible contamination of the device.
In addition, the H2S sensor and the SO2 sensor adopt a parallel connection structure for air inlet. The gas flow in the sensor is kept stable during measurement, and cross interference is prevented. Thereby making the detection result more stable.
Optionally, the H2S sensor is a wide range H2S sensor and the SO2 sensor is a wide range SO2 sensor. The characteristic decomposition product value of SF6 equipment when breaking down can be reflected fast and accurately, and the wide measuring range sensitivity is suitable, the phenomenon of transfiniting can not appear. In order to expand the detection application, small-range high-precision H2S, SO2 and CO sensors can be additionally arranged, specifically, the small-range high-precision H2S, SO2 and CO sensors can be selected according to the measurement precision and can be directly purchased in the market, and the precision and range standard can refer to the prior art. Of course, it will be understood by those skilled in the art that different types of sensors may be replaced or added to achieve multiple gas detections.
The detection host machine also comprises an acousto-optic alarm module which is connected with the singlechip and used for carrying out acousto-optic alarm when the detected gas exceeds an alarm threshold value.
Referring to fig. 6, the single chip is a processing core of the detection host, and not only collects and processes data, but also sends control information to the outside. The singlechip is an STM32F407ZGT6 controller of the Italian semiconductor company and serves as a singlechip control module. The gas sensor is provided with a signal conditioning module, and the singlechip is provided with an A/D conversion module. The device comprises a controllable flow valve module, an air pump module, a touch screen display module, a lithium battery module and the like.
Referring to fig. 7, the gas line 200 includes a ptfe tube and a male quick-connect coupling and a female quick-connect coupling connected to both ends of the ptfe tube, respectively. The polytetrafluoroethylene tube may be selected to have a shorter length and a smaller diameter.
Referring to fig. 8, the plenum/valve has a measured gas port 261, an air port 262, an H2S sensor port 263, and an SO2 sensor port 264.
In the embodiment, the combination of the quick plug connectors is adopted, and the functions of matching the quick connectors on site and carrying out operation are achieved through the quick plug connector group, so that the emergency repair work efficiency is improved.
The detection system is convenient to assemble, the detection operation in a narrow space is convenient to develop, and the anti-pollution capacity of the system is enhanced by connecting the designed parts through short pipelines and quick plug-in connectors. Meanwhile, the small-caliber pipeline can bring effective pipeline pressure drop, can stabilize the measured airflow and prevent the sensor from being impacted. The polytetrafluoroethylene material has high strength, ageing resistance and corrosion resistance, SF6 decomposers are not easy to remain on the surface, and the influence on subsequent tests is reduced.
The large-scale anti-pollution sensor, the active air pump, the air mixing chamber (valve), the controllable flow valve, the single chip microcomputer, the lithium battery display screen and other components are integrated in the detection host to achieve the purposes of small portability of the detection host, strong anti-pollution capacity, good restorability and good detection continuity, so that the working efficiency is effectively improved, and the large-scale data display of the decomposition products after the SF6 equipment is failed is realized.
Through the rear-mounted pluggable active carbon filtration and adsorption device 3 at the tail end of the gas circuit, the non-toxicity and harmless detection operation is realized, and the health and safety of operators are guaranteed.
In this embodiment, the following selections may be made for each component:
the model of the singlechip module is STM32F407ZGT 6. Has sufficiently powerful functions.
The module model MT6071IE is shown. The touch screen can be selected from nylon 4.3 inches, the working voltage is 10.5-28V, usb, rs232 and 485 can be used, and the can bus is communicated with the touch screen. And this touch screen carries the interface design software EB8000 itself.
The flow control valve module is model D-600 CD/MD.
The model JXM-H2S of the H2S sensor module has the range of 0-1000PPM (0-100 PPM can be selected when the fine measurement is carried out).
The model JXM-SO2 of the SO2 sensor module ranges from 0PPM to 2000PPM (0-20 PPM can be selected during fine measurement).
The single chip microcomputer can refer to the prior art for processing the sensor data.
For the gas pipeline used, the pressure in the SF6 equipment is 0.4-0.6MPa because of the high pressure environment, and although the pipeline is communicated during testing, the actual pressure is not so high, but the pipeline still needs to be customized. The filtering and adsorbing device can be made by self.
In addition, the above components can be adjusted according to actual conditions.
Aiming at the characteristics of test work of an emergency repair site, the invention optimizes the integral structure and internal components of an SF6 detection instrument by the design of a quick plug-in connector group, a short pipeline, a wide-range anti-pollution sensor, an active air pump, a rear activated carbon filter, portability and the like.
The device is convenient for SF6 equipment fault first-aid repair field detection operators to operate, has strong anti-pollution capacity, good restorability and good detection continuity, thereby improving the working efficiency and realizing the reading of large-range data after faults and the non-toxicity and harmless performance of the whole operation.
Example two
Referring to fig. 6 and 9, a method for rapidly detecting a gas marker decomposition product after an SF6 equipment failure, which uses a rapid detector for a gas marker decomposition product after an SF6 equipment failure in the first embodiment, includes the following steps:
firstly, an active air pump is in an opening state, air enters a gas mixing chamber/valve through a controllable flow valve through a gas pipeline, and simultaneously detected gas also enters the gas mixing chamber/valve through the controllable flow valve through the gas pipeline;
secondly, the detected gas is quickly detected through a sensor, and the single chip microcomputer processes the measurement data and displays the measurement result on a display screen;
and finally, the detected gas is discharged from a gas outlet of the detection host machine, and the tail gas is collected by a gas collecting device or is treated by a filtering and adsorbing device.
When the detection process of the detected gas is completed, the active air pump starts a powerful mode to pump the outside air into the air mixing chamber/valve and the gas pipeline, and the outside air is filled in the air mixing chamber/valve and the gas pipeline to force the residual detected gas to be discharged.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (11)
1. A rapid detector for gas marker decomposition products after SF6 equipment failure, comprising: the connector combination comprises multiple types of connectors connected with SF6 equipment, and each multiple type of connector is connected with a quick plug connector nut;
the detection host comprises a detection host shell with a detection cavity, an air inlet quick plug-in connector male and a tail gas quick plug-in connector female, wherein the air inlet quick plug-in connector male and the tail gas quick plug-in connector female are connected with the detection host shell and used for introducing SF6 decomposition product gas, an H2S sensor, an SO2 sensor and a single chip microcomputer are arranged in the detection cavity, a display screen is arranged outside the detection host shell, the H2S sensor and the SO2 sensor are respectively used for detecting H2S gas and SO2 gas, and the single chip microcomputer processes measurement data of the H2S sensor and the SO2 sensor and displays measurement results on the display screen;
the filtering and adsorbing device comprises a filtering and adsorbing device shell with a filtering and adsorbing cavity, a replaceable adsorption activated carbon material arranged in the filtering and adsorbing cavity, and a quick plug-in connector male connected with the filtering and adsorbing device shell and connected with and passing through the filtering and adsorbing cavity, wherein the quick plug-in connector male is connected with the quick plug-in connector female of tail gas.
2. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 1, wherein: the detection cavity is internally provided with a gas mixing chamber/valve and an active air pump, the gas mixing chamber/valve is connected with the air inlet quick plug-in connector and the active air pump through a gas pipeline, and the external air pump is sent into the gas mixing chamber/valve through the active air pump to be mixed with the SF6 decomposition product gas.
3. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 2, wherein: the detection host machine also comprises a controllable flow valve which is used for controlling the proportion of the SF6 decomposition product gas and air.
4. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 2, wherein: the H2S sensor and the SO2 sensor adopt a parallel connection structure for air inlet.
5. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 1, wherein: the H2S sensor is a wide-range H2S sensor or a small-range high-precision H2S sensor, and the SO2 sensor is a large-range SO2 sensor or a small-range high-precision SO2 sensor.
6. The rapid detector of claim 5, wherein the detector is used for detecting the gas marker decomposition products after SF6 equipment failure: the gas mixing chamber/valve is also connected with a CO sensor in parallel with an H2S sensor and an SO2 sensor.
7. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 2, wherein: and a flow regulating valve is arranged on the upper or downstream side of the air inlet quick plug connector male for regulating the flow of the entering SF6 decomposition product gas.
8. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 2, wherein: the gas pipeline comprises a polytetrafluoroethylene pipe, and a quick plug connector male and a quick plug connector female which are respectively connected to two ends of the polytetrafluoroethylene pipe.
9. The rapid detector of the gas marker decomposition products after SF6 equipment failure as set forth in claim 2, wherein: and a quick plug-in coarse filter joint is arranged on the downstream side of the air inlet quick plug-in joint male for filtering small and medium particle pollutants.
10. A method for rapidly detecting a gas marker decomposition product after SF6 equipment failure by using the rapid detector for a gas marker decomposition product after SF6 equipment failure as claimed in any of claims 1 to 8, comprising the steps of:
firstly, an active air pump is in an opening state, air enters a gas mixing chamber/valve through a controllable flow valve through a gas pipeline, and simultaneously detected gas also enters the gas mixing chamber/valve through the controllable flow valve through the gas pipeline;
secondly, rapidly detecting the detected gas through a sensor;
and finally, the detected gas is discharged from a gas outlet of the detection host machine, and the tail gas is collected by a gas collecting device or is treated by a filtering and adsorbing device.
11. The method for rapidly detecting the gas marker decomposition product after the SF6 equipment failure as recited in claim 10, wherein: when the detection process of the detected gas is completed, the active air pump starts a powerful mode to pump the outside air into the air mixing chamber/valve and the gas pipeline, and the outside air is filled in the air mixing chamber/valve and the gas pipeline to force the residual detected gas to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005281.9A CN110794089A (en) | 2019-10-22 | 2019-10-22 | Rapid detector and method for gas marker decomposition products after SF6 equipment failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005281.9A CN110794089A (en) | 2019-10-22 | 2019-10-22 | Rapid detector and method for gas marker decomposition products after SF6 equipment failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110794089A true CN110794089A (en) | 2020-02-14 |
Family
ID=69440540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911005281.9A Pending CN110794089A (en) | 2019-10-22 | 2019-10-22 | Rapid detector and method for gas marker decomposition products after SF6 equipment failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110794089A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014682A (en) * | 2020-08-05 | 2020-12-01 | 深圳供电局有限公司 | Cable fault detection device |
| CN112098472A (en) * | 2020-08-18 | 2020-12-18 | 国网河北省电力有限公司电力科学研究院 | Series SF6Decomposition product detection sensor, detection device and detection method |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505146A (en) * | 1983-06-16 | 1985-03-19 | Allied Corporation | Portable SF6 decomposition sensor |
| DE202007018307U1 (en) * | 2007-03-24 | 2008-06-12 | Harting Electric Gmbh & Co. Kg | Measuring device for connectors |
| CN101476997A (en) * | 2009-01-14 | 2009-07-08 | 重庆电力科学试验研究院 | Sulfur hexafluoride gas sample collection apparatus |
| CN101839959A (en) * | 2010-05-18 | 2010-09-22 | 蔡毅敏 | Method and device for locating electrical failure of SF6 equipment |
| CN201740843U (en) * | 2010-05-18 | 2011-02-09 | 蔡毅敏 | SF6 equipment electrical failure location device |
| CN202854112U (en) * | 2012-09-14 | 2013-04-03 | 常州宝威电子科技有限公司 | Tester for decomposition products of SF6 (sulfur hexafluoride) gas |
| CN104950075A (en) * | 2015-04-24 | 2015-09-30 | 北京仁创科技集团有限公司 | Detection device and detection method for detecting flue gas released during coated sand casting |
| CN206020373U (en) * | 2016-08-25 | 2017-03-15 | 贵州电网有限责任公司电力科学研究院 | A kind of to SF in GIS6The device of gas analyte, purity and humidity on-line monitoring |
| CN107703255A (en) * | 2017-07-31 | 2018-02-16 | 芜湖凯尔电气科技有限公司 | Air quality detecting device |
| CN207336355U (en) * | 2017-09-08 | 2018-05-08 | 河南省日立信股份有限公司 | Carbon tetrafluoride device for fast detecting in sulfur hexafluoride gas decomposition product |
| CN108051261A (en) * | 2014-06-09 | 2018-05-18 | 国网山东省电力公司潍坊供电公司 | It is standby with sulfur hexafluoride sampling cartridge to sample the high power equipment of purity |
| CN109443452A (en) * | 2018-12-27 | 2019-03-08 | 上海伦仕智能科技有限公司 | High-voltage switch gear failure gas on-line analysis equipment |
| CN209069893U (en) * | 2018-10-19 | 2019-07-05 | 山西吉瑞科技发展有限公司 | A kind of mine gas safety detection device |
| CN209166511U (en) * | 2018-12-06 | 2019-07-26 | 河南省智仪系统工程有限公司 | The online gas monitoring instrument of four-in-one |
| CN211263354U (en) * | 2019-10-22 | 2020-08-14 | 国网浙江省电力有限公司绍兴供电公司 | SF6 decomposer detection device after internal discharge fault of GIS equipment of substation |
-
2019
- 2019-10-22 CN CN201911005281.9A patent/CN110794089A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505146A (en) * | 1983-06-16 | 1985-03-19 | Allied Corporation | Portable SF6 decomposition sensor |
| DE202007018307U1 (en) * | 2007-03-24 | 2008-06-12 | Harting Electric Gmbh & Co. Kg | Measuring device for connectors |
| CN101476997A (en) * | 2009-01-14 | 2009-07-08 | 重庆电力科学试验研究院 | Sulfur hexafluoride gas sample collection apparatus |
| CN101839959A (en) * | 2010-05-18 | 2010-09-22 | 蔡毅敏 | Method and device for locating electrical failure of SF6 equipment |
| CN201740843U (en) * | 2010-05-18 | 2011-02-09 | 蔡毅敏 | SF6 equipment electrical failure location device |
| CN202854112U (en) * | 2012-09-14 | 2013-04-03 | 常州宝威电子科技有限公司 | Tester for decomposition products of SF6 (sulfur hexafluoride) gas |
| CN108051261A (en) * | 2014-06-09 | 2018-05-18 | 国网山东省电力公司潍坊供电公司 | It is standby with sulfur hexafluoride sampling cartridge to sample the high power equipment of purity |
| CN104950075A (en) * | 2015-04-24 | 2015-09-30 | 北京仁创科技集团有限公司 | Detection device and detection method for detecting flue gas released during coated sand casting |
| CN206020373U (en) * | 2016-08-25 | 2017-03-15 | 贵州电网有限责任公司电力科学研究院 | A kind of to SF in GIS6The device of gas analyte, purity and humidity on-line monitoring |
| CN107703255A (en) * | 2017-07-31 | 2018-02-16 | 芜湖凯尔电气科技有限公司 | Air quality detecting device |
| CN207336355U (en) * | 2017-09-08 | 2018-05-08 | 河南省日立信股份有限公司 | Carbon tetrafluoride device for fast detecting in sulfur hexafluoride gas decomposition product |
| CN209069893U (en) * | 2018-10-19 | 2019-07-05 | 山西吉瑞科技发展有限公司 | A kind of mine gas safety detection device |
| CN209166511U (en) * | 2018-12-06 | 2019-07-26 | 河南省智仪系统工程有限公司 | The online gas monitoring instrument of four-in-one |
| CN109443452A (en) * | 2018-12-27 | 2019-03-08 | 上海伦仕智能科技有限公司 | High-voltage switch gear failure gas on-line analysis equipment |
| CN211263354U (en) * | 2019-10-22 | 2020-08-14 | 国网浙江省电力有限公司绍兴供电公司 | SF6 decomposer detection device after internal discharge fault of GIS equipment of substation |
Non-Patent Citations (2)
| Title |
|---|
| 樊友平;武利会;康李一;别睿;陈杰;: "110kV XLPE电缆GIS内锥插拔式快速中间接头的设计", 高电压技术, no. 02 * |
| 钱进;史会轩;刘晓波;刘晓丽;徐阳;张英;吴湘黔;: "SF_6电气设备中分解物SO_2的在线监测技术及应用", 水电能源科学, no. 08 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014682A (en) * | 2020-08-05 | 2020-12-01 | 深圳供电局有限公司 | Cable fault detection device |
| CN112098472A (en) * | 2020-08-18 | 2020-12-18 | 国网河北省电力有限公司电力科学研究院 | Series SF6Decomposition product detection sensor, detection device and detection method |
| CN112098472B (en) * | 2020-08-18 | 2024-04-16 | 国网河北省电力有限公司电力科学研究院 | Series SF 6 Decomposition product detection sensor, detection device and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110794089A (en) | Rapid detector and method for gas marker decomposition products after SF6 equipment failure | |
| CN207300999U (en) | A kind of volatile organic compounds analytical equipment | |
| CN103463925B (en) | Based on the device for recovering tail gas of control method for pressure balance | |
| CN211263354U (en) | SF6 decomposer detection device after internal discharge fault of GIS equipment of substation | |
| CN111024752B (en) | Hydrogen fuel cell automobile exhaust check out test set | |
| CN101893559A (en) | Infrared quantitative leak detector of sulfur hexafluoride gas | |
| CN204008639U (en) | A kind of Gases Dissolved in Transformer Oil on-Line Monitor Device | |
| CN202693564U (en) | Comprehensive sulfur hexafluoride gas detection device | |
| CN108122387A (en) | A kind of flammable explosive warning device to harmful gas automatic calibrator | |
| CN201319034Y (en) | Sulphur hexafluoride device indoor gas content online monitoring device | |
| CN218157533U (en) | Perfluoroisobutyronitrile and carbon dioxide mixing ratio detector | |
| CN107101858B (en) | Online analysis instrument pretreatment and protection system | |
| CN2747583Y (en) | Check mechanism for failure detector of sulphur hexafluoride electric equipment | |
| CN103207342B (en) | A kind of checking experiment grounding intelligent prior-warning device | |
| CN201464588U (en) | Polarity measurement circuit of electrolytic capacitor | |
| CN113124523B (en) | Intelligent poison-measuring and ventilation integrated equipment and ventilation method for electric power well | |
| CN211577076U (en) | Coal spontaneous combustion real-time measuring device | |
| CN210109270U (en) | Locomotive wind pressure relay detection equipment | |
| CN110297066B (en) | VOCs concentration on-line measuring device | |
| CN209542219U (en) | Sulfur hexafluoride leakage monitor | |
| CN112964298A (en) | Portable waste gas pollution source discharges record appearance | |
| CN201716156U (en) | Sulfur hexafluoride gas infrared quantitative leakage detector | |
| CN216595010U (en) | Fault detection equipment for combustible gas alarm | |
| CN102866182B (en) | Carbon monoxide detector for sulfur hexafluoride electric equipment | |
| CN214124943U (en) | Special transformer equipment monitoring system |
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 | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Mingwei Inventor after: Fang Jun Inventor after: Ni Qianhang Inventor after: Chen Zixuan Inventor after: Zhu Mingliang Inventor after: Li Guodong Inventor after: Wang Tao Inventor after: Qiu Qiong Inventor before: Chen Mingwei Inventor before: Ni Qianhang Inventor before: Chen Zixuan Inventor before: Zhu Mingliang Inventor before: Li Guodong Inventor before: Wang Tao Inventor before: Qiu Qiong |