CN210346995U - SF6Gas leakage on-line monitoring system calibration device - Google Patents
SF6Gas leakage on-line monitoring system calibration device Download PDFInfo
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- CN210346995U CN210346995U CN201921224227.9U CN201921224227U CN210346995U CN 210346995 U CN210346995 U CN 210346995U CN 201921224227 U CN201921224227 U CN 201921224227U CN 210346995 U CN210346995 U CN 210346995U
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Abstract
The utility model discloses a SF6The gas leakage on-line monitoring system calibration device comprises a box body, a fan, a sensor, a gas outlet and a gas inlet. The box body is a closed container with a valve on one side. A fan is fixedly arranged in the box body, and a sensor is fixedly arranged in the box body and used for detecting SF6Gas concentration and oxygen concentration. The box body is also provided with an air outlet and an air inlet. The air outlet is connected with a vacuum pump through an air pipe, and the air inlet is connected with an electromagnetic valve and an air bottle. By the device and the method, the SF can be quickly and conveniently realized6Gas leakage on-line monitoring system for checking。
Description
Technical Field
The utility model relates to a sulfur hexafluoride detecting system check-up technical field, in particular to SF6Gas leakage on-line monitoring system calibration equipment.
Background
Sulfur hexafluoride (SF)6) As an excellent insulating and arc extinguishing medium, the high-voltage arc extinguishing medium is widely applied to high-voltage circuit breakers and transformation equipment in the power industry all over the world at present. Pure SF6The gas is colorless, odorless, non-combustible, and chemically stable at normal temperature, but in power systems, SF6The gas mainly serves as an insulating and arc-extinguishing medium, and SF can be caused under the influence of electric arcs, partial discharge, high temperature and other factors6The decomposition of gas can generate acidic and strong corrosive electrolyte after the decomposition product is hydrated, thus reducing the insulating capability of the equipment and possibly influencing the mechanical performance of the equipment, in particular to certain high-toxicity fluorine-containing decomposition products which can cause dizziness, pulmonary edema, even coma and death if being inhaled by human bodies in a large amount.
SF, on the other hand6The relative air density is 6.602, the specific gravity is large, the diffusion performance is poor, and the indoor GIS (sulfur hexafluoride enclosed type combined electrical appliance) space is relatively closed, the air circulation is not smooth, and SF6And its decomposition products are deposited in the chamber, plus SF6The gas is colorless and tasteless, thereby causing great harm to patrols and maintainers. When GIS leaks, SF6Gas accumulates in the lower space above the terrace, causes local oxygen deficiency, suffocates people to cause major accidents, and the leakage result is extremely serious.
The safety protection guide rule of DL/T639-2016 sulfur hexafluoride electrical equipment and test and overhaul personnel clearly stipulates that a sulfur hexafluoride gas leakage monitoring alarm device is required to be installed in an equipment room, the concentration and the oxygen content of sulfur hexafluoride in air are required to be detected periodically, and when the concentration of sulfur hexafluoride in air exceeds 1000 muL/L or the oxygen content is lower than 18%, an instrument is required to send out an alarm signal.
At present, domestic SF6Gas leakage monitoring device manufacturers are dozens of manufacturers, however, product performance differences are large due to different research and development and production strength among the manufacturers, and few users carry out inspection work aiming at the devices before and after use, and corresponding supervision and maintenance are lacked. Simultaneous SF6The leakage alarm device has long working time, and alarm points can drift after being influenced by environmental factors such as temperature, humidity and the like, so that the precision can be reduced. In addition, no relevant measures are taken in the monitoring system to guarantee SF6And (4) normal operation of the leakage alarm device.
The national instrument component quality supervision and inspection center and the China measurement science research institute have set up 2 standards of a JBT10893-2008 high-voltage combined electrical appliance power distribution room sulfur hexafluoride environment monitoring system and a JJF 1263-. At SF6In the actual maintenance process of the leakage on-line monitoring alarm device, the verification/verification relates to SF6The transportation and the configuration of multi-concentration standard gases such as oxygen and the like cause that the field verification work is difficult to implement, and partial SF of users6The gas online monitoring and alarming device can generate false alarm or failure of the device and cannot give an alarm in the operation process, so that reliable information cannot be obtained in advance or equipment cannot be maintained and replaced in time, the significance of the device is lost, and the safety risk of production of workers is increased.
Currently on the market for SF implementation6The gas leakage on-line monitoring field calibrating device has few products, the main core components of only some products are high-precision gas flow distribution devices, and the distributed gas is directly output through a hose. By mixing the volume flowIn principle, the SF for checking can be prepared according to the set automatic proportioning6The detection gas has the advantages of high precision, good repeatability, self-calibration and the like, but the dilution ratio is limited, namely, SF with low concentration is required6The standard gas is used as a gas source, the gas source has larger volume in actual field operation and is inconvenient to transport, for example, the HNPPQ-I dual-channel dynamic gas distribution instrument adopts a flow mixing method, the maximum output flow is 1000ml/min, the accuracy is +/-1.0% F.S, the repeatability is +/-0.2% F.S, and the maximum dilution ratio is 200: 1; the SMF06-5-2 type standard gas distribution instrument consists of four parts, namely a gas mass flow controller, a power supply system, a gas circuit system and an electric control system, wherein the maximum single-circuit dilution ratio is 50:1, the precision is less than or equal to 1%, the repeatability is less than or equal to +/-0.2%, and the maximum output flow is 3750 ml.
In summary, the current use for SF6The gas leakage on-line monitoring system calibration device or the disclosed technical scheme has the following problems: 1. the low-concentration standard gas is needed, so that the gas cylinder needed under the condition of the same checking times is relatively large, or the low-concentration standard gas needs to be supplemented repeatedly, so that the gas cylinder is not convenient to carry; 2. the flowmeter is controlled to directly distribute and output by the set value, closed loop detection is not needed, and the distribution concentration of the air outlet is not easy to be perceived if the distribution concentration changes; 3. SF requiring a period of time to reach a stable concentration6Gas is continuously output and directly discharged to the air, and relatively more gas is released to the surrounding environment, which is not beneficial to the popularization and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model discloses a following technical scheme realizes:
SF (sulfur hexafluoride)6The gas leakage on-line monitoring system calibration device comprises a box body, a fan, a sensor, a gas outlet and a gas inlet;
the box body is a closed container with a valve on one surface;
the box is internally and fixedly provided with a fan, and the box is internally and fixedly provided with a sensor for detecting SF6The gas concentration;
the box body is also provided with an air outlet and an air inlet.
Preferably, the shutter is connected with the case through a hinge, and the shutter can rotate along the hinge.
Preferably, the valve is provided with a line passing hole, and the line passing hole is in a semicircular arc shape and is positioned on one edge of the valve.
Preferably, a sealing tape is fixed to one side of the case where the shutter is provided.
Preferably, the sealing tape is made of soft rubber.
Preferably, the air inlet comprises SF6Air inlet, N2An air inlet and a filtered air inlet;
SF6the other end of the air inlet is connected with one end of an electromagnetic valve VY1 through an air pipe, and the other end of an electromagnetic valve YV1 is connected with SF through an air pipe6Connecting the gas cylinders;
N2the other end of the air inlet is connected with one end of an electromagnetic valve VY2 through an air pipe, and the other end of an electromagnetic valve YV2 is connected with N through an air pipe2Connecting the gas cylinders;
the other end of the filtered air inlet is connected with one end of a solenoid valve VY3 through an air pipe, and the other end of the solenoid valve YV3 is connected with a filtered air pump through an air pipe.
Preferably, the air outlet is connected with a vacuum pump through an air pipe.
Preferably, an oxygen sensor is further fixedly arranged in the box body (1) and used for detecting the oxygen concentration.
Preferably, the device also comprises a control unit, wherein the control unit comprises an MCU and an operational amplifier, and a communication interface of the MCU is connected with the sensor (3); the input interface of the MCU is respectively connected with the two buttons SB1 and SB 2; the output interface of the control unit is respectively connected with the electromagnetic valve VY1, the electromagnetic valve VY2, the electromagnetic valve VY3, the motor of the fan M1 and the motor of the vacuum pump M2.
In order to facilitate the detection, the utility model discloses still be based on above-mentioned SF6An SF is provided on the basis of a gas leakage on-line monitoring system calibration device6The gas leakage on-line monitoring system calibration method comprises the following steps:
s1, opening a valve and checking the SF to be checked6The sensor of the gas leakage on-line monitoring system is placed in the box body, thenRear handle SF6A connecting wire of a sensor of the gas leakage on-line monitoring system is put into the wire passing hole and the valve is closed;
s2, pressing a button SB1, controlling the vacuum pump to start by the MCU, and pumping out the gas in the box body through the gas outlet;
s3, after a period of air exhaust treatment, the MCU controls the vacuum pump to stop working, and then the MCU controls the vacuum pump to stop working with SF6Air inlet, N2The electromagnetic valves corresponding to the air inlet and the filtered air inlet are opened, and the corresponding air is injected into the box body;
s4, the MCU controls the fan to start, stirs the gas in the mixing box, and meanwhile, the MCU reads the signal of the sensor and the signal of the sampling oxygen sensor;
s5, when the gas in the box body meets the preset requirement, the MCU controls to close the electromagnetic valve and the fan;
s6 by comparison with SF6And (4) verifying the system according to the difference between the oxygen concentration value read on the control interface of the gas leakage on-line monitoring system and the oxygen concentration value set by the calibrator.
By the device and the method, the SF can be quickly and conveniently realized6And checking the gas leakage on-line monitoring system. The utility model discloses can widen SF6The gas leakage online monitoring alarm device has the advantages that the selectivity of the verification device is enhanced, the flexibility of the verification device is enhanced, the verification and verification program is simplified, an effective field solution is provided, and the normal operation or the timely repair of the online monitoring alarm device is powerfully guaranteed, so that the life safety of electric power workers is guaranteed; simultaneously forcefully push SF6The application scene and the application range of the gas online monitoring and alarming device are expanded, and the comprehensive application cost of an online alarming system is favorably reduced.
Drawings
Fig. 1 is a front view of an embodiment provided by the present invention;
fig. 2 is a left side view of an embodiment provided by the present invention;
fig. 3 is a top view of an embodiment provided by the present invention;
fig. 4 is a perspective view of an embodiment provided by the present invention;
FIG. 5 is a view showing the inside of the case after the shutter is opened;
FIG. 6 is a schematic diagram of an MCU circuit;
fig. 7 is a schematic circuit diagram of the oxygen sensor.
In the drawings, each reference numeral denotes: the air conditioner comprises a box body 1, a fan 2, a sensor 3, an air outlet 4, an air inlet 5, a valve 10, a wire passing hole 100, a sealing tape 101 and SF6Gas inlet 50, N2An air inlet 51, a filtered air inlet 52.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described clearly and completely with reference to fig. 1 to 7 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in FIGS. 1-5, a SF6The gas leakage on-line monitoring system calibration device comprises a box body 1, a fan 2, a sensor 3, a gas outlet 4 and a gas inlet 5.
The case 1 is a closed container having a shutter 10 formed at one surface thereof. Referring to fig. 1, 4 and 5, the shutter 10 is connected to the box 1 by a hinge and can rotate along the hinge to open or close the box 1.
The shutter 10 is provided with a wire passing hole 100, and the wire passing hole 100 is in a semicircular arc shape and is located on one edge of the shutter 10. The wire hole 100 is used for passing through SF6And connecting wires of the gas leakage on-line monitoring system.
In order to improve the sealing performance, a sealing tape 101 is adhered or riveted on the side of the box body 1 where the valve 10 is installed, and the sealing tape 101 is made of soft rubber material, preferably silica gel material, and has good stability and soft texture, so that the sealing effect can be better realized. When the shutter 10 is closed, a good sealing effect can be achieved by contact with the sealing tape 101. In addition, a layer of flexible rubber sheet or silica gel sheet is also adhered and fixed on the wire passing hole 100 for preventing the gas concentration in the box body from being influenced by the overlarge opening.
A fan 2 is fixedly arranged in the box body 1 by adopting bolts, preferably an axial flow fan is adopted, and the function of the fan is to accelerate the mixing of the gas in the container. And a control line of the fan 2 is led out of the box body 1 and is connected with an external power supply.
A high-precision sensor 3 is fixedly arranged in the box body 1, and the sensor 3 is used for detecting SF6The gas concentration. Such as a sulfur tetrafluoride sensor from smartGAS corporation. The body of the sensor 3 is fixedly arranged in the box body 1, and the connecting wire is led out of the box body 1 and is connected with the control unit.
The box body 1 is also provided with an air inlet 5. The gas inlet 5 comprises SF6Gas inlet 50, N2 An air inlet 51 and a filtered air inlet 52. The air inlet is formed by matching a pipe with external threads with a corresponding fixing nut, and the pipe penetrates into one side wall of the box body 1, so that one end of the pipe is positioned in the box body 1, and the other end of the pipe is positioned outside the box body 1. The pipe is fixed to the side wall of the box 1 by a nut. The air inlets of different types are respectively connected with an air bottle or an air pump corresponding to air through a pipeline and an electromagnetic valve.
In particular, SF6The other end of the air inlet 50 is connected with one end of an electromagnetic valve VY1 through an air pipe, and the other end of an electromagnetic valve YV1 is connected with SF through an air pipe6Connecting the gas cylinders; the SF6The gas cylinder is filled with high-purity SF6The purity of the gas can reach 99.99%. N is a radical of2The other end of the air inlet 51 is connected with one end of an electromagnetic valve VY2 through an air pipe, and the other end of an electromagnetic valve YV2 is connected with N through an air pipe2Connecting the gas cylinders; the other end of the filtered air inlet 52 is connected with one end of an electromagnetic valve VY3 through an air pipe, and the other end of the electromagnetic valve YV3 is connected with a micro-filtering air pump through an air pipe. Because of the adoption of high-purity gas, the volume of the gas cylinder can be ensured to be very small, and the gas cylinder is convenient to carry. Using high purity SF6The gas steel cylinder improves the portability of the whole device, and the concentration of sulfur hexafluoride required by the standard gas to be checked is low, and the using amount is small, so that the gas steel cylinder can be used for a long time after being inflated once; the air is filtered, so that the air is easy to obtain, the influence of environmental gas on a verification/calibration result is reduced, meanwhile, the influence of harmful trace particle components in the air on precision elements of the equipment is reduced, and the service life of the equipment is prolonged.
The box body 1 is also provided with an air outlet 4, the structure of the air outlet 4 is similar to that of the air inlet, the air outlet 4 is formed by matching a pipe with external threads with a corresponding fixing nut, but the installation position of the air outlet 4 is slightly lower than that of the air inlet 5, and the purpose of the design is that SF is used as the SF6The lower the gas outlet 4 is installed, the more advantageous is the discharge of all residual gases, the heavier the gas specific gravity is than air. The air outlet 4 is connected with a vacuum pump through a pipeline and is used for pumping out other parts in the box body 1 so as to accurately distribute air. The vacuum pump is arranged to reduce the influence of environmental gas, and high-precision and high-repeatability verification data are effectively obtained by removing interference gas in the cover.
An oxygen sensor is also arranged in the box body 1, and the installation mode of the oxygen sensor is used for detecting SF6The sensors 3 for gas concentration are similar in that the sensor body is arranged in the box body 1, and lead wires are led out of the box body and connected with a control unit.
The box 1 should also be equipped with a control unit for controlling the fan 2, the sensor 3, the vacuum pump, the solenoid valve of the air inlet and the oxygen sensor. As shown in fig. 5 and fig. 6, fig. 5 is a core control schematic diagram of a control unit, wherein the MCU adopts a conventional 8-bit or 32-bit single chip microcomputer, such as an AVR series, or an STM32 series single chip microcomputer.The MCU acquires data by communicating with the sensor 3 through 485, and S1 in the figure is the sensor 3. The MCU is also connected with the oxygen sensor circuit through an AD interface, and fig. 6 shows the oxygen sensor circuit, wherein the oxygen sensor circuit amplifies the signals through an operational amplifier U5 and then sends analog signals to an analog input end of the MCU, and then the MCU performs sampling and A/D conversion. The output end of the MCU respectively controls the motor of the fan M1, the motor of the vacuum pump M2 and the SF6Gas inlet 50, N2Three electromagnetic valves YV1, YV2 and YV3 corresponding to the air inlet 51 and the filtered air inlet 52. In addition, the MCU is also connected to two buttons SB1 and SB2 for start or stop control of the system, respectively. In addition, the control unit is also provided with a display, a memory, a communication interface and the like, and can display the concentration in real time, control the input of standard gas, record data, transmit data, record and transmit verification results and the like. Need to for SF6When the gas leakage on-line monitoring system is checked, the following steps can be adopted:
1. opening the shutter 10 and checking the SF6A sensor of the gas leakage on-line monitoring system is put into the box body 1, and then SF is put into the box body6A connecting wire of a sensor of the gas leakage on-line monitoring system is put into the wire through hole 100 and the valve 10 is closed;
2. pressing a button SB1, controlling the vacuum pump to start by the MCU, and pumping out the gas in the box body 1 through the gas outlet 4;
3. after a period of air extraction treatment, the MCU controls the vacuum pump to stop working, and then controls SF6Air inlets 50, N2Electromagnetic valves corresponding to the air inlet 51 and the filtered air inlet 52 are opened, and corresponding gas is injected into the box body 1;
4. the MCU controls the fan 2 to start, stirs the gas in the mixing box 1, and meanwhile, the MCU reads the signal of the sensor 3 and the signal of the sampling oxygen sensor;
5. when the gas in the box body 1 meets the preset requirement, the MCU controls the electromagnetic valve and the fan 2 to be closed; wherein it can be set according to the corresponding gas concentrations obtained by the sensor 3 and the oxygen sensor, such as SF detected by the sensor 36When the gas concentration reaches a certain concentration value, the electromagnetic valve and the fan 2 can be closed.
6. By comparing SF6SF obtained by reading on a control interface of an on-line gas leakage monitoring system6Gas content and SF obtained by calibration6The difference in gas content was verified against the system.
Furthermore, due to the conventional SF6The gas leakage on-line monitoring system also has the function of oxygen monitoring, wherein the SF is monitored6SF of gas leakage on-line monitoring system6The SF may also be performed before or after the partial verification step6Gas leakage on-line monitoring system O2And partial oxygen content detection is carried out, and the specific steps are as follows:
need to for SF6When the gas leakage on-line monitoring system is used for oxygen detection and verification, the following steps can be adopted:
1. opening the shutter 10 and checking the SF6The sensor of the gas leakage system is put into the case 1, and then SF is added6A connecting wire of a sensor of the gas leakage on-line monitoring system is put into the wire through hole 100 and the valve 10 is closed;
2. pressing a button SB1, controlling the vacuum pump to start by the MCU, and pumping out the gas in the box body 1 through the gas outlet 4;
3. after a period of air extraction treatment, the MCU controls the vacuum pump to stop working, and then controls N2Electromagnetic valves corresponding to the air inlet 51 and the filtered air inlet 52 are opened, and corresponding gas is injected into the box body 1;
4. the MCU controls the fan 2 to start, stirs the gas in the mixing box 1, and reads the signal of the oxygen sensor;
5. when the gas in the box body 1 reaches a preset requirement (for example, the oxygen content is below 18 percent, most sulfur hexafluoride sensors can give an alarm when the oxygen content is lower than the value, so as to check whether the sensor alarm is in a normal state);
6. by comparing SF6And (4) verifying the system according to the difference between the oxygen concentration value read on the control interface of the gas leakage on-line monitoring system and the oxygen concentration value set by the calibrator.
By passingThe device and the method can quickly and conveniently realize SF6And checking the gas leakage on-line monitoring system. The utility model discloses can widen SF6The gas leakage online monitoring alarm device has the advantages that the selectivity of the verification device is enhanced, the flexibility of the verification device is enhanced, the verification and verification program is simplified, an effective field solution is provided, and the normal operation or the timely repair of the online monitoring alarm device is powerfully guaranteed, so that the life safety of electric power workers is guaranteed; simultaneously forcefully push SF6The application scene and the application range of the gas online monitoring and alarming device are expanded, and the comprehensive application cost of an online alarming system is favorably reduced.
Furthermore, the utility model discloses a gaseous allotment device of real-time analysis coordinated control that adopts of examination check-up is equipped with for high sensitivity sulfur hexafluoride detector in detecting chamber department box, and the gaseous concentration of real-time assay detection chamber sulfur hexafluoride, when concentration reachs the setting value, detector signals stop to input sulfur hexafluoride gas, can obtain the standard check-up gas of design concentration. Compared with the current common calibrator which only uses a high-precision gas distributor as a core and directly controls the gas concentration by using a high-precision flowmeter through calculation, the real-time detection of the project design principle can ensure that the gas concentration for verification and calibration has high matching degree with the design concentration, and effectively ensures the sensitivity and the repeatability of the calibration result.
In addition, 99.9% SF can be used as the gas source6High purity gas, different from common gas distribution instruments because of the limited dilution ratio of 1: 50-200 using 10% SF6The standard gas is used for obtaining the high accuracy and the stable concentration is 1000 uL/L target gas, therefore the utility model discloses can greatly reduce the weight and the volume of a whole set of portable check-up/detector.
Currently SF6The direct blowing method commonly used for on-site verification of gas leakage on-line monitoring devices, i.e. set SF6The standard gas directly reaches a probe of the monitoring device or the position near the monitoring device through the hose, after a period of time is stable, the standard gas is verified through the feedback of the controller of the monitoring device, the standard gas is simple to use, but the standard gas is easy to be interfered by the environment, the data fluctuation is large, the verification precision is limited, meanwhile, the standard gas is continuously consumed, and the gas consumption is reducedMore are. The utility model discloses a design nimble suitable check case that has and can realize certain vacuum function, through getting rid of in the check yard of the real-time concentration control of check incasement interference factor cooperation, effectively obtain high accuracy and high repeatability check-up data.
Claims (9)
1. SF (sulfur hexafluoride)6The gas leakage on-line monitoring system calibration device is characterized by comprising a box body (1), a fan (2), a sensor (3), a gas outlet (4) and a gas inlet (5);
the box body (1) is a closed container with a valve (10) arranged on one surface;
the box body (1) is internally and fixedly provided with a fan (2), and the box body (1) is also internally and fixedly provided with a sensor (3) for detecting SF6The gas concentration;
the box body (1) is also provided with an air outlet (4) and an air inlet (5).
2. SF according to claim 16Gas leakage on-line monitoring system calibration equipment, its characterized in that:
the valve (10) is connected with the box body (1) through a hinge, and the valve (10) can rotate along the hinge.
3. SF according to claim 16Gas leakage on-line monitoring system calibration equipment, its characterized in that:
the shutter (10) is provided with a line passing hole (100), and the line passing hole (100) is in a semicircular arc shape and is positioned on one edge of the shutter (10).
4. SF according to claim 16Gas leakage on-line monitoring system calibration equipment, its characterized in that:
a sealing tape (101) is fixed on one side of the box body (1) provided with the valve (10).
5. SF according to claim 46Gas leakage on-line monitoring systemCalibration equipment, its characterized in that:
the sealing belt (101) is made of soft rubber materials.
6. SF according to claim 16Gas leakage on-line monitoring system calibration equipment, its characterized in that:
the gas inlet (5) comprises SF6Gas inlet (50), N2An air inlet (51) and a filtered air inlet (52);
SF6the other end of the air inlet (50) is connected with one end of an electromagnetic valve VY1 through an air pipe, and the other end of an electromagnetic valve YV1 is connected with SF through an air pipe6Connecting the gas cylinders;
N2the other end of the air inlet (51) is connected with one end of an electromagnetic valve VY2 through an air pipe, and the other end of an electromagnetic valve YV2 is connected with N through an air pipe2Connecting the gas cylinders;
the other end of the filtered air inlet (52) is connected with one end of an electromagnetic valve VY3 through an air pipe, and the other end of the electromagnetic valve YV3 is connected with a filtered air pump through an air pipe.
7. SF according to claim 66Gas leakage on-line monitoring system calibration equipment, its characterized in that:
the air outlet (4) is connected with a vacuum pump through an air pipe.
8. SF according to claim 76Gas leakage on-line monitoring system calibration equipment, its characterized in that:
an oxygen sensor is fixedly arranged in the box body (1) and used for detecting the oxygen concentration.
9. SF according to claim 86Gas leakage on-line monitoring system calibration equipment, its characterized in that:
the control unit comprises an MCU and an operational amplifier, and a communication interface of the MCU is connected with the sensor (3); the input interface of the MCU is respectively connected with the two buttons SB1 and SB 2; the output interface of the control unit is respectively connected with the electromagnetic valve VY1, the electromagnetic valve VY2, the electromagnetic valve VY3, the motor of the fan M1 and the motor of the vacuum pump M2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921224227.9U CN210346995U (en) | 2019-07-31 | 2019-07-31 | SF6Gas leakage on-line monitoring system calibration device |
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| CN201921224227.9U CN210346995U (en) | 2019-07-31 | 2019-07-31 | SF6Gas leakage on-line monitoring system calibration device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307936A (en) * | 2019-07-31 | 2019-10-08 | 大唐水电科学技术研究院有限公司 | SF6Gas leaks on-line monitoring system calibration equipment and method of calibration |
| CN114323451A (en) * | 2021-12-27 | 2022-04-12 | 广东电网有限责任公司 | Gas leakage monitoring device and electrical equipment box |
-
2019
- 2019-07-31 CN CN201921224227.9U patent/CN210346995U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307936A (en) * | 2019-07-31 | 2019-10-08 | 大唐水电科学技术研究院有限公司 | SF6Gas leaks on-line monitoring system calibration equipment and method of calibration |
| CN114323451A (en) * | 2021-12-27 | 2022-04-12 | 广东电网有限责任公司 | Gas leakage monitoring device and electrical equipment box |
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