CN209387801U - A kind of sulfur hexafluoride gas leakage on-line checking alarm - Google Patents
A kind of sulfur hexafluoride gas leakage on-line checking alarm Download PDFInfo
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- CN209387801U CN209387801U CN201822125888.8U CN201822125888U CN209387801U CN 209387801 U CN209387801 U CN 209387801U CN 201822125888 U CN201822125888 U CN 201822125888U CN 209387801 U CN209387801 U CN 209387801U
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Abstract
The utility model proposes a kind of sulfur hexafluoride gas to leak on-line checking alarm, it includes power supply, single-chip microcontroller, alarm, display, draught fan control circuit, lambda sensor and A/D conversion circuit, further includes multichannel Temperature and Humidity circuit and multichannel sulfur hexafluoride detection circuit；Sulfur hexafluoride detection circuit includes that ultrasonic wave transmitting circuit and ultrasonic wave receive circuit；Power supply, alarm, display, draught fan control circuit, Temperature and Humidity circuit, A/D conversion circuit, ultrasonic wave transmitting circuit and ultrasonic wave receive circuit and are electrically connected respectively with single-chip microcontroller, lambda sensor and A/D conversion circuit are electrically connected, and ultrasonic wave transmitting circuit and ultrasonic wave receive circuit and be wirelessly connected.Ultrasonic wave transmitting circuit and ultrasonic wave reception circuit structure are simple, and at low cost, practicability is high；Whole device can detecte the position that the leakage of SF6 gas and detection SF6 gas leakage whether occurs, and can also detect multichannel temperature and humidity, circuit structure is simple, at low cost.
Description
Technical field
The utility model relates to field of gas detection more particularly to a kind of leakage on-line checking alarms of sulfur hexafluoride gas
Instrument.
Background technique
Since SF6-sulfur hexafluoride gas has excellent insulation and arc extinction performance, it is widely used in high-voltage electrical apparatus
In production and use.Due to the production of equipment, processing and installation etc., letting out for sulfur hexafluoride gas can be slowly generated
Leakage.Pure SF6 colorless and odorless, non-ignitable, chemical property is highly stable at normal temperature, still, grasps in disjunctions such as breaker, switches
During work, under the factors such as electric arc, corona, electric spark and high temperature, SF6 gas can decomposite noxious material, be discharged into big
In gas, environment is polluted, these noxious materials can stimulate skin, eyes, mucous membrane, and sucking excessively can also cause headache, pulmonary edema, very
To causing death, while detrimental effect also is brought to the normal operation of electrical equipment.And the equipment filled with SF6 gas is pacified mostly
Mounted in interior, air passage rates are relatively slow, if SF6 gas is not easy to dissipate once a leak occurs, will deposit indoors, due to this
Gas colorless and odorless is not easy to be found after leakage, and therefore, whether monitoring sulfur hexafluoride gas, which leaks, is just particularly important.SF6
Gas leakage usually occurs at the sealing surface, pad and pipe joint of combined electrical apparatus, and it is old to be primarily due to gasket
Change or weld seam sand holes occurs and causes.The acquisition of SF6 Leakage inspection alarm system SF6 on the market and temperature and humidity
Acquisition can not achieve comprehensive acquisition, and structure is complicated for another Acquisition Circuit, at high cost.Now need one kind comprehensive can acquire
SF6 and the sulfur hexafluoride gas of temperature and humidity leak on-line checking alarm.
Utility model content
In view of this, the utility model proposes it is a kind of can comprehensive acquisition SF6 and temperature and humidity sulfur hexafluoride gas
Leak on-line checking alarm.
The technical solution of the utility model is achieved in that the utility model provides a kind of sulfur hexafluoride gas leakage
On-line checking alarm comprising power supply, single-chip microcontroller, alarm, display, draught fan control circuit, lambda sensor and A/D conversion
Circuit further includes multichannel Temperature and Humidity circuit and multichannel sulfur hexafluoride detection circuit；
Sulfur hexafluoride detection circuit includes that ultrasonic wave transmitting circuit and ultrasonic wave receive circuit；
Power supply, alarm, display, draught fan control circuit, Temperature and Humidity circuit, A/D conversion circuit, ultrasonic wave transmitting
Circuit and ultrasonic wave receive circuit and are electrically connected respectively with single-chip microcontroller, and lambda sensor and A/D conversion circuit are electrically connected, ultrasonic wave
Transmit circuit and ultrasonic wave receive circuit and are wirelessly connected.
On the basis of above technical scheme, it is preferred that single-chip microcontroller uses STC89C52 chip.
It is further preferred that ultrasonic wave transmitting circuit includes ultrasound transmit sensor TCT40-2F, operational amplifier
LM386, polarized capacitor C1, capacitor C2, capacitor C3, polarized capacitor C4 and resistance R1；
The noninverting input of LM386 and the P0.1 pin of STC89C52 chip are electrically connected, and the reverse input end of LM386 connects
6 pins on ground, LM386 are electrically connected with the power supply, and 1 pin of LM386 and the anode of polarized capacitor C1 are electrically connected, LM386
8 pins and the cathode of polarized capacitor C1 be electrically connected, one end of 7 pins of LM386 and capacitor C2 are electrically connected, capacitor
The other end of C2 and 4 pins of LM386 are grounded, the output end of LM386 respectively with one end of capacitor C3 and polarized capacitor C4
Anode be electrically connected, one end of the other end of capacitor C3 and resistance R1 are electrically connected, the other end ground connection of resistance R1, polarized
The cathode of capacitor C4 and one end of ultrasound transmit sensor TCT40-2F are electrically connected, ultrasound transmit sensor TCT40-2F
The other end ground connection.
Still more preferably, it includes that ultrasonic receiver sensor PCT40-2S, the first operation are put that ultrasonic wave, which receives circuit,
Big device LM318, second operational amplifier LM318, resistance R2, resistance R3, capacitor C5 and capacitor C6；
Ultrasonic receiver sensor PCT40-2S is electrically connected by resistance R1 and 3 pins of the first operational amplifier LM318
It connects, 2 and 4 pins of the first operational amplifier LM318 are grounded, and 7 pins and power supply of the first operational amplifier LM318 are electrical
6 pins of connection, the first operational amplifier LM318 are electrically connected by one end of capacitor C5 and resistance R3, and resistance R3's is another
End and 3 pins of second operational amplifier LM318 are electrically connected, and 2 and 4 pins of second operational amplifier LM318 are grounded,
7 pins of second operational amplifier LM318 connect power supply, and 6 pins of second operational amplifier LM318 and one end of capacitor C6 are electrical
Connection, the other end of capacitor C6 and the P0.2 pin of STC89C52 chip are electrically connected.
Still more preferably, ultrasound transmit sensor and ultrasonic receiver sensor pass through the insulation with air inlet
Pipe connection.
It is further preferred that Temperature and Humidity circuit includes being Temperature Humidity Sensor SHT15；
The P1.0 pin of the SCK pin of SHT15 and STC89C52 chip is electrically connected, the DATA pin of SHT15 with
The P2.0 pin of STC89C52 chip is electrically connected.
A kind of sulfur hexafluoride gas leakage on-line checking alarm of the utility model has following compared with the existing technology
The utility model has the advantages that
(1) when being leaked due to SF6 gas, shutdown switch can generate electromagnetism, by the way that ultrasonic wave transmitting circuit and ultrasound is arranged
Wave receives circuit, when the leakage of SF6 gas occurs for equipment, can detecte the specific location of equipment SF6 gas leakage, convenient for checking
And maintenance, another ultrasound wave transmitting circuit and ultrasonic wave reception circuit structure are simple, and at low cost, practicability is high；
(2) Temperature Humidity Sensor integrally detected by using temperature and humidity can detect the temperature and humidity of environment simultaneously, simplify
Circuit structure separately uses multichannel Temperature Humidity Sensor, can detect many places temperature and humidity simultaneously；
(3) whole device can detecte the position that the leakage of SF6 gas and detection SF6 gas leakage whether occurs, and may be used also
To detect multichannel temperature and humidity, circuit structure is simple, at low cost.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure chart that a kind of sulfur hexafluoride gas of the utility model leaks on-line checking alarm；
Fig. 2 is that a kind of sulfur hexafluoride gas of the utility model leaks ultrasonic wave transmitting circuit and temperature in on-line checking alarm
The circuit diagram of humidity measuring circuit；
Fig. 3 is the electricity that a kind of sulfur hexafluoride gas of the utility model leaks that ultrasonic wave in on-line checking alarm receives circuit
Lu Tu.
Specific embodiment
Below in conjunction with the utility model embodiment, the technical solution in the utility model embodiment is carried out clear
Chu is fully described by, it is clear that and described embodiment is only a part of embodiment of the utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work
Under the premise of every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of sulfur hexafluoride gas of the utility model leaks on-line checking alarm comprising power supply,
It is single-chip microcontroller, alarm, display, draught fan control circuit, lambda sensor, A/D conversion circuit, multichannel Temperature and Humidity circuit, more
Road sulfur hexafluoride detection circuit and multipath oxygen detection circuit.Wherein, sulfur hexafluoride detection circuit includes ultrasonic wave transmitting circuit
Circuit is received with ultrasonic wave.
In the present embodiment, single-chip microcontroller uses STC89C52 chip, and STC89C52 chip is a kind of low-power consumption, high-performance
CMOS8 8-digit microcontroller, STC89C52 is with following standard feature: 8k bytes Flash, 256 byte RAM, 32 I/O mouth lines,
WatchDog Timer, 2 data pointers, three 16 bit timing devices/counters, 2 grades of interrupt structures of 6 vector, full duplex string
Row mouth, crystal oscillator and clock circuit in piece.
Ultrasonic wave transmitting circuit, as shown in Fig. 2, ultrasonic wave transmitting circuit include ultrasound transmit sensor TCT40-2F,
Operational amplifier LM386, polarized capacitor C1, capacitor C2, capacitor C3, polarized capacitor C4 and resistance R1；LM386's is in the same direction defeated
The P0.1 pin for entering end and STC89C52 chip is electrically connected, the reverse input end ground connection of LM386,6 pins and electricity of LM386
Source is electrically connected, and 1 pin of LM386 and the anode of polarized capacitor C1 are electrically connected, 8 pins and polarized capacitor of LM386
The cathode of C1 is electrically connected, and 7 pins of LM386 and one end of capacitor C2 are electrically connected, and the 4 of the other end of capacitor C2 and LM386
Pin is grounded, and anode of the output end of LM386 respectively with one end of capacitor C3 and polarized capacitor C4 is electrically connected, capacitor C3
The other end and one end of resistance R1 be electrically connected, the other end of resistance R1 ground connection, the cathode and ultrasonic wave of polarized capacitor C4
One end of emission sensor TCT40-2F is electrically connected, the other end ground connection of ultrasound transmit sensor TCT40-2F.Operation is put
The noninverting input of big device LM386 obtains one and sends the pulse signal that working frequency is 40khz from single-chip microcontroller, passes through operation
Amplifier LM386 is amplified to sufficiently large energy, increases the distance of ultrasonic wave transmitting and the energy of ultrasonic wave, after the increase
Ultrasonic wave be transmitted to ultrasound transmit sensor TCT40-2F, driving ultrasonic wave emitting head launches 40khz impulse wave, passes through sky
Between blaze abroad outward.
Ultrasonic wave receives circuit, and when ultrasonic wave is propagated in air, energy attenuation degree is directly proportional to propagation distance, surpasses
The ultrasonic wave that acoustic receiver circuit receives can all have decaying, therefore, when ultrasonic receiver sensor receives the ultrasound of return
Ultrasonic pulse is become alternate electrical signal by wave signal, receiving sensor, is handled after amplifier amplifies.As shown in figure 3,
It includes ultrasonic receiver sensor PCT40-2S, the first operational amplifier LM318, the second operation amplifier that ultrasonic wave, which receives circuit,
Device LM318, resistance R2, resistance R3, capacitor C5 and capacitor C6.Ultrasonic receiver sensor PCT40-2S passes through resistance R1 and the
3 pins of one operational amplifier LM318 are electrically connected, and 2 and 4 pins of the first operational amplifier LM318 are grounded, the first operation
7 pins of amplifier LM318 are electrically connected with the power supply, and 6 pins of the first operational amplifier LM318 pass through capacitor C5 and resistance
One end of R3 is electrically connected, and the other end of resistance R3 and 3 pins of second operational amplifier LM318 are electrically connected, the second operation
2 and 4 pins of amplifier LM318 are grounded, and 7 pins of second operational amplifier LM318 connect power supply, second operational amplifier
6 pins of LM318 and one end of capacitor C6 are electrically connected, the other end of capacitor C6 and the P0.2 pin electricity of STC89C52 chip
Property connection.In the present embodiment, ultrasonic wave receive circuit using operational amplifier LM318 composition two-stage signal amplifying circuit to its into
Row amplification, to meet the requirement of gain bandwidth and conversion rate.
Wherein, ultrasound transmit sensor is connected to ultrasonic receiver sensor by the insulation tube with air inlet.
In the present embodiment, the detection of temperature and humidity uses SHT15.SHT15 type sensor is monolithic, multiduty intelligence
Energy sensor, wherein not only including the miniature relative humidity sensor based on humidity-sensitive capacitor and the miniature temperature based on band-gap circuit
Sensor is spent, and there are also 14 A/D converters and 2 line serial line interfaces, the relative humidity and temperature by calibration can be exported
Serial data, so do not used in system traditional design needs multicircuit switch, A/D converter and signal condition electricity
Road, system structure is compact and simple, and SHTl5 can be in same position Relative Humidity Measuring and temperature.In the present embodiment,
As shown in Fig. 2, the P1.0 pin of the SCK pin of SHT15 and STC89C52 chip is electrically connected, the DATA pin of SHT15 with
The P2.0 pin of STC89C52 chip is electrically connected.In the present embodiment, multiple SHT15 can be used, wherein each SHT15's
The P1.0 pin of SCK pin and STC89C52 chip is electrically connected, the DATA pin of multiple SHT15 respectively with STC89C52 core
The I/O pin of piece, which corresponds, to be electrically connected.
When shelf depreciation occurs for inside electric appliance, ultrasonic wave is generated at electric discharge and is propagated around, particular up to electricity
The surface of gas equipment container.Piezoelectric element is loaded onto equipment outer wall, under ultrasonic wave effect, piezoelectric element generates on two end faces
The bound charge of alternation causes charge variation on end metal electrode or generates alternating current on external loop.Therefore, Ke Yijian
This electric signal is surveyed to judge whether partial discharge occurs inside equipment.The characteristics of ultrasonic detector detects is that anti-interference is stronger, is made
, can be in operation with the electric discharge that detects insulating inner when pressure test with convenient, the electric loop of sensor and equipment is without appointing
What is contacted, and is convenient for fault location.
The foregoing is merely the better embodiments of the utility model, are not intended to limit the utility model, it is all
Within the spirit and principles of the utility model, it is practical new to should be included in this for any modification, equivalent replacement, improvement and so on
Within the protection scope of type.
Claims (6)
1. a kind of sulfur hexafluoride gas leaks on-line checking alarm comprising power supply, single-chip microcontroller, alarm, display, blower
Control circuit, lambda sensor and A/D conversion circuit, it is characterised in that: further include multichannel Temperature and Humidity circuit and multichannel hexafluoro
Change sulphur detection circuit；
The sulfur hexafluoride detection circuit includes that ultrasonic wave transmitting circuit and ultrasonic wave receive circuit；
The power supply, alarm, display, draught fan control circuit, Temperature and Humidity circuit, A/D conversion circuit, ultrasonic wave transmitting
Circuit and ultrasonic wave receive circuit and are electrically connected respectively with single-chip microcontroller, and lambda sensor and A/D conversion circuit are electrically connected, ultrasonic wave
Transmit circuit and ultrasonic wave receive circuit and are wirelessly connected.
2. a kind of sulfur hexafluoride gas as described in claim 1 leaks on-line checking alarm, it is characterised in that: the monolithic
Machine uses STC89C52 chip.
3. a kind of sulfur hexafluoride gas as claimed in claim 2 leaks on-line checking alarm, it is characterised in that: the ultrasound
Wave transmitting circuit includes ultrasound transmit sensor TCT40-2F, operational amplifier LM386, polarized capacitor C1, capacitor C2, electricity
Hold C3, polarized capacitor C4 and resistance R1；
The noninverting input of the LM386 and the P0.1 pin of STC89C52 chip are electrically connected, and the reverse input end of LM386 connects
6 pins on ground, LM386 are electrically connected with the power supply, and 1 pin of LM386 and the anode of polarized capacitor C1 are electrically connected, LM386
8 pins and the cathode of polarized capacitor C1 be electrically connected, one end of 7 pins of LM386 and capacitor C2 are electrically connected, capacitor C2
The other end and 4 pins of LM386 be grounded, the output end of LM386 respectively with one end of capacitor C3 and polarized capacitor C4
Anode is electrically connected, and the other end of capacitor C3 and one end of resistance R1 are electrically connected, the other end ground connection of resistance R1, polarized electricity
One end of the cathode and ultrasound transmit sensor TCT40-2F that hold C4 is electrically connected, ultrasound transmit sensor TCT40-2F's
Other end ground connection.
4. a kind of sulfur hexafluoride gas as claimed in claim 3 leaks on-line checking alarm, it is characterised in that: the ultrasound
It includes ultrasonic receiver sensor PCT40-2S, the first operational amplifier LM318, second operational amplifier that wave, which receives circuit,
LM318, resistance R2, resistance R3, capacitor C5 and capacitor C6；
The ultrasonic receiver sensor PCT40-2S is electrically connected by resistance R1 and 3 pins of the first operational amplifier LM318
It connects, 2 and 4 pins of the first operational amplifier LM318 are grounded, and 7 pins of the first operational amplifier LM318 electrically connect with power supply
It connects, 6 pins of the first operational amplifier LM318 are electrically connected by one end of capacitor C5 and resistance R3, the other end of resistance R3
It being electrically connected with 3 pins of second operational amplifier LM318,2 and 4 pins of second operational amplifier LM318 are grounded, the
7 pins of two operational amplifier LM318 connect power supply, and 6 pins of second operational amplifier LM318 electrically connect with one end of capacitor C6
It connects, the other end of capacitor C6 and the P0.2 pin of STC89C52 chip are electrically connected.
5. a kind of sulfur hexafluoride gas as claimed in claim 4 leaks on-line checking alarm, it is characterised in that: the ultrasound
Wave emission sensor is connected to ultrasonic receiver sensor by the insulation tube with air inlet.
6. a kind of sulfur hexafluoride gas as claimed in claim 2 leaks on-line checking alarm, it is characterised in that: described warm and humid
Spending detection circuit to include is Temperature Humidity Sensor SHT15；
The P1.0 pin of the SCK pin of the SHT15 and STC89C52 chip is electrically connected, the DATA pin of SHT15 with
The P2.0 pin of STC89C52 chip is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125888.8U CN209387801U (en) | 2018-12-18 | 2018-12-18 | A kind of sulfur hexafluoride gas leakage on-line checking alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125888.8U CN209387801U (en) | 2018-12-18 | 2018-12-18 | A kind of sulfur hexafluoride gas leakage on-line checking alarm |
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| Publication Number | Publication Date |
|---|---|
| CN209387801U true CN209387801U (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822125888.8U Expired - Fee Related CN209387801U (en) | 2018-12-18 | 2018-12-18 | A kind of sulfur hexafluoride gas leakage on-line checking alarm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309098A (en) * | 2020-10-27 | 2021-02-02 | 福建优迪电力技术有限公司 | Passive wireless SF6 gas detection device capable of realizing fan linkage |
| CN113075509A (en) * | 2021-03-30 | 2021-07-06 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Online monitoring device and monitoring method for insulation of water and electricity connector of bar of internal water cooling generator |
| CN113432803A (en) * | 2021-07-06 | 2021-09-24 | 厦门加华电力科技有限公司 | Qualitative and quantitative integrated leak detector |
| CN114166275A (en) * | 2021-11-30 | 2022-03-11 | 厦门加华电力科技有限公司 | Portable high tension switchgear SF6 comprehensive detector |
-
2018
- 2018-12-18 CN CN201822125888.8U patent/CN209387801U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309098A (en) * | 2020-10-27 | 2021-02-02 | 福建优迪电力技术有限公司 | Passive wireless SF6 gas detection device capable of realizing fan linkage |
| CN113075509A (en) * | 2021-03-30 | 2021-07-06 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Online monitoring device and monitoring method for insulation of water and electricity connector of bar of internal water cooling generator |
| CN113075509B (en) * | 2021-03-30 | 2024-03-15 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Insulation on-line monitoring device and monitoring method for water-cooled generator bar water-electricity connector |
| CN113432803A (en) * | 2021-07-06 | 2021-09-24 | 厦门加华电力科技有限公司 | Qualitative and quantitative integrated leak detector |
| CN114166275A (en) * | 2021-11-30 | 2022-03-11 | 厦门加华电力科技有限公司 | Portable high tension switchgear SF6 comprehensive detector |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190913 Termination date: 20211218 |