CN203455138U - Gas pipeline valve inner leakage detection apparatus based on microwave technologies - Google Patents
Gas pipeline valve inner leakage detection apparatus based on microwave technologies Download PDFInfo
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- CN203455138U CN203455138U CN201320484788.9U CN201320484788U CN203455138U CN 203455138 U CN203455138 U CN 203455138U CN 201320484788 U CN201320484788 U CN 201320484788U CN 203455138 U CN203455138 U CN 203455138U
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- wave detector
- directional coupler
- acquisition circuit
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Abstract
The utility model relates to the technical field of radio orientation, valve and pipeline systems and discloses a gas pipeline valve inner leakage detection apparatus based on microwave technologies. The gas pipeline valve inner leakage detection apparatus based on microwave technologies is composed of a microwave signal source, antennas, a signal amplifier, a demodulator and outputs. The microwave signal source output tuned by a tuning voltage is connected with an emitting antenna. A receiving antenna is connected with the signal amplifier. The output of the signal amplifier is sequentially connected with the demodulator and an output circuit. The apparatus can detect small leakage or even micro-leakage of a gas pipeline valve in a quantitative way. The apparatus has the characteristics of rapid detection, accurate result, safety and reliability.
Description
Technical field
The utility model is a kind of gas pipe line valves leakage pick-up unit based on microwave technology.Relate to radio direction finding, valve and piping system technical field.
Technical background
Valve is one of the most widely used equipment in gas pipe line, acts on very crucially, and valves leakage brings larger harm to the safe operation of gas pipe line, therefore, valves leakage accurately detects improving pipeline conveying management level, reduces economic loss, has important practical significance.
Valves leakage mainly adopts pressure application, sound method, tracer method etc. at present.
Pressure application
General using is arranged on the instrument such as on-the-spot tensimeter or pressure unit, and the variation by manometer before and after observation valve, judges whether to leak.Chinese invention patent application number is 98209418.3 to disclose a kind of pressure transducer that utilizes and automatically detect the device that lifting jack leaks.
Acoustic emission method
While leaking in valve occurs, can produce noise, by measuring noise, can judge whether to leak.Chinese invention patent application number is 200910217337.7 to disclose a kind of high pressure heater internal leakage fault diagnosis device based on acoustic emission detection.
Trace method
Chinese invention patent application number detects for 200710032409.1. discloses a kind of dimethyl ether that adds in coal gas the device whether valve leaks.
Said method is poor for the less seepage effect of valve.
The Electromagnetic Wave Detection leakage method relevant to the utility model
The electromagnetic wave detecting method of Chinese invention patent duct system has proposed to have been proposed checked the pipeline underexcitation electromagnetic wave of object piping system and it is propagated in pipe by the transmitting antenna of dispensing device by the transmitting antenna CN95191631.9 of dispensing device, make the receiving antenna of receiving device externally along pipeline, move simultaneously, accept the electromagnetic wave leaking and the ingredient of piping system is checked, the Electromagnetic Wave Detection receiving according to receiving trap goes out leakage and the crackle of pipeline.
It is the microwave of launching TE01 and TM01 pattern in pipeline for Chinese invention patent application numbers 200410048038.2, and detect respectively pattern, reflection wave power or the scattering wave power of TE01 and TM01 microwave, and reflection coefficient mould and angle values, when any one value detecting surpasses while transfiniting threshold value accordingly, illustrate that in pipeline, defectiveness exists, start microwave source and launch modulated microwave in pipeline, detect modulated microwave simultaneously and be emitted to the mistiming of receiving reflex time, then according to the mistiming, calculate ducted defective locations.
Not yet have at present disclosedly based on microwave valves leakage detection method, the method that disclosed Electromagnetic Wave Detection is leaked is and detects pipe leakage and pipeline crack, and is not suitable for the detection of valves leakage.Microwave detects pipe leakage and valve leak has larger difference, and the firstth, electromagnetic receiving end placement location is different, and during pipeline leakage testing, receiving end is placed on pipeline outside, and valves leakage is when detect, receiving end need to be placed on pipe interior; The secondth, method emphasis is different, pays close attention to the position of leakage point during pipeline leakage testing, and valves leakage is paid close attention to the size of valve leakage automatic inspection while detecting.
Utility model content
The purpose of this utility model is the little leakage of a kind of quantitative detection of the invention gas pipe line valves leakage pick-up unit based on microwave technology that even minute leakage detection speed is fast, result is accurate, safe and reliable.
Microwave detection method schematic diagram of the present utility model as shown in Figure 1.Utilize the existing instrumentation tap of valve 4 upstream proper site to be detected or newly boring, through coupling arrangement I 2, pipe interior emitting antenna 3 is placed in the pipeline of valve downstream, and the electromagnetic wave of its generation is propagated in pipeline; In the existing instrumentation tap of valve 4 downstream proper site to be detected or newly boring, place microwave detecting device 7 and through the inner receiving antenna 5 of coupling arrangement II 6 connecting tubes, by detecting the level situation of electromagnetic receiving device, judge whether valve the size of leakage and leakage rate occurs.
Microwave launcher 1 by concentric cable to pipe interior emitting antenna 3 launched microwaves, in valve to be detected 4 upstreams, form electromagnetic field, utilize microwave detecting device 7 by pipe interior receiving antenna 5, to detect the microwave intensity in valve to be detected 4 downstreams, by calculating the equivalent aperture that can draw valves leakage.
Under normal circumstances, the microwave of valve downstream can not propagate into downstream or downstream and very small microwave leakage can be detected.When valve seal breakage causes occurring interior leakage, microwave can be from interior leak propagates down stream, by the microwave intensity receive leaking with receiving antenna, can detect the existence of valves leakage, and by with upstream microwave intensity relatively can judge the size of interior leakage quantity.
The equivalent aperture of valves leakage can be calculated by following formula:
In formula
D-valves leakage equivalent aperture, m
K-coefficient, m
-1
The electromagnetic wavelength of λ-use, m
α-electromagnetic wave attenuation rate, db
The concrete formation of gas pipe line valves leakage pick-up unit based on microwave technology as shown in Figure 2, is comprised of several parts of oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit, main control computer and emitting antenna.Oscillator, isolator, variable attenuator, directional coupler connect successively, directional coupler one tunnel output connects wave detector, wave detector output connects the input of main control computer through data acquisition circuit, another road output of directional coupler is through emitting antenna output, and after another wave detector receives detection, output connects the input of main control computer through another data acquisition circuit.
The microwave signal that oscillator produces by directional coupler be divided into two paths of signals ，Yi road signal after wave detector as with reference to passage output signal, for the reference signal of systematic survey valves leakage amount; Another road signal arrives tested valve upstream space via emitting antenna.
Described microwave launcher theory diagram as shown in Figure 3, comprises oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit and emitting antenna; Oscillator, isolator, variable attenuator, directional coupler connect successively, and directional coupler one tunnel output connects wave detector, and wave detector output connects data acquisition circuit, and another road output of directional coupler connects emitting antenna.
The microwave signal that oscillator produces by directional coupler be divided into two paths of signals ，Yi road signal after wave detector as with reference to passage output signal, for the reference signal of systematic survey valves leakage amount; Another road signal via emitting antenna to tested valve upstream space, because the large minor valve specification of tested valve space changes, thus the size of the emissive power of system size and the valve test space, equipment set up relevant with the aspect such as installation.In order to adapt to different applied environments, by variable attenuator, regulate the emissive power of measuring system, after equipment is installed, debug, by variable attenuator adjustment System suitable emissive power extremely.
Described microwave receiving device theory diagram as shown in Figure 4, is comprised of receiving antenna, wave detector and data acquisition circuit.Receiving antenna output connects wave detector, and wave detector output connects data acquisition circuit.
The electrical schematic diagram of the described gas pipe line valves leakage pick-up unit based on microwave technology as shown in Figure 5, the SMA interface of oscillator HMC513LP5 is connected by concentric cable with the SMA interface of isolator MTG801A, the SMA interface of isolator MTG801A is connected by concentric cable with the SMA interface of variable attenuator 8495B, the SMA interface of variable attenuator 8495B is connected by concentric cable with the SMA interface 1 of directional coupler 87310B, the SMA interface 2 of directional coupler 87310B is connected by concentric cable with the SMA interface of emitting antenna RF, the SMA interface 3 of directional coupler 87310B is connected by concentric cable with the SMA interface of wave detector 8474C, the SMA interface of data acquisition circuit A/D is connected by concentric cable with the SMA interface of wave detector 8474C, R232 interface according to Acquisition Circuit A/D is connected by R232 connecting line with PC computing machine R232 interface, the SMA interface of receiving antenna RF is connected by concentric cable with the SMA interface of wave detector 8474C.
Effect of the present utility model is
1, propose a kind of employing microwave and judged whether hard sealed valve leaks, and can judge the size of leakage rate;
2, adopt microwave to detect, detection speed is fast, and result is accurate;
3, utilize existing instrumentation tap or newly boring, adopt screw connection structure, safe and reliable.
Accompanying drawing explanation
Fig. 1 microwave detection method schematic diagram
Fig. 2 microwave detecting device theory diagram
Fig. 3 microwave launcher theory diagram
Fig. 4 microwave receiving device theory diagram
Fig. 5 microwave detecting device electrical schematic diagram
1-microwave launcher, 2-coupling arrangement I wherein
3-pipe interior emitting antenna 4-valve to be detected
5-microwave detecting device, 6-coupling arrangement II
7-pipe interior receiving antenna
Embodiment
Embodiment. this example is an experimental prototype, and concrete formation as shown in Figure 2, is comprised of several parts of oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit, main control computer and emitting antenna.Oscillator, isolator, variable attenuator, directional coupler connect successively, directional coupler one tunnel output connects wave detector, wave detector output connects the input of main control computer through data acquisition circuit, another road output of directional coupler is through emitting antenna output, and after another wave detector receives detection, output connects the input of main control computer through another data acquisition circuit.
Described microwave launcher theory diagram as shown in Figure 3, comprises oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit and emitting antenna; Oscillator, isolator, variable attenuator, directional coupler connect successively, and directional coupler one tunnel output connects wave detector, and wave detector output connects data acquisition circuit, and another road output of directional coupler connects emitting antenna.
Described microwave receiving device theory diagram as shown in Figure 4, is comprised of receiving antenna, wave detector and data acquisition circuit.Receiving antenna output connects wave detector, and wave detector output connects data acquisition circuit.
The electrical schematic diagram of the gas pipe line valves leakage pick-up unit based on microwave technology as shown in Figure 5, the SMA interface of oscillator HMC513LP5 is connected by concentric cable with the SMA interface of isolator MTG801A, the SMA interface of isolator MTG801A is connected by concentric cable with the SMA interface of variable attenuator 8495B, the SMA interface of variable attenuator 8495B is connected by concentric cable with the SMA interface 1 of directional coupler 87310B, the SMA interface 2 of directional coupler 87310B is connected by concentric cable with the SMA interface of emitting antenna RF, the SMA interface 3 of directional coupler 87310B is connected by concentric cable with the SMA interface of wave detector 8474C, the SMA interface of data acquisition circuit A/D is connected by concentric cable with the SMA interface of wave detector 8474C, R232 interface according to Acquisition Circuit A/D is connected by R232 connecting line with PC computing machine R232 interface, the SMA interface of receiving antenna RF is connected by concentric cable with the SMA interface of wave detector 8474C.
Wherein:
Oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit, main control computer and emitting antenna Jun Xuan city pin product, concrete model is as follows:
Oscillator is selected the HMC513LP5 of Hittite company microwave radio device;
Isolator is selected the MTG801A of Yue Hang company ferrite isolator;
Variable attenuator is selected the 8495B of Agilent company variable attenuator;
Directional coupler is selected the 87310B of Agilent company directional coupler;
Wave detector is selected the 8474C of Agilent company wave detector;
Data acquisition circuit is selected the 400M of Wei Chuanda company high-speed collection card.
This routine implementation and operation process is as follows: microwave launcher 1 is connected to valve downstream pipeline by coupling arrangement 2, and microwave detecting device 5 is connected to valve downstream pipeline by coupling arrangement 6.Microwave launcher by concentric cable to pipe interior emitting antenna 3 launched microwaves, in valve to be detected 4 upstreams, form electromagnetic field, utilize microwave detecting device 5 by pipe interior receiving antenna 7, to detect the microwave intensity in valve to be detected 4 downstreams, by calculating the equivalent aperture that can draw valves leakage.
This example, through test, is utilized existing instrumentation tap or newly boring, adopts screw connection structure, safe and reliable; Can judge whether to leak, and can judge the size of leakage rate; Detection speed is fast, and result is accurate.
Claims (5)
1. the gas pipe line valves leakage pick-up unit based on microwave technology, is characterized in that it is comprised of several parts of oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit, main control computer and emitting antenna; Oscillator, isolator, variable attenuator, directional coupler connect successively, directional coupler one tunnel output connects wave detector, wave detector output connects the input of main control computer through data acquisition circuit, another road output of directional coupler is through emitting antenna output, and after another wave detector receives detection, output connects the input of main control computer through another data acquisition circuit.
2. the gas pipe line valves leakage pick-up unit based on microwave technology according to claim 1, is characterized in that concrete formation is comprised of several parts of oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit, main control computer and emitting antenna; Oscillator, isolator, variable attenuator, directional coupler connect successively, directional coupler one tunnel output connects wave detector, wave detector output connects the input of main control computer through data acquisition circuit, another road output of directional coupler is through emitting antenna output, and after another wave detector receives detection, output connects the input of main control computer through another data acquisition circuit;
The microwave signal that oscillator produces by directional coupler be divided into two paths of signals ，Yi road signal after wave detector as with reference to passage output signal, for the reference signal of systematic survey valves leakage amount; Another road signal arrives tested valve upstream space via emitting antenna.
3. the gas pipe line valves leakage pick-up unit based on microwave technology according to claim 1, is characterized in that described microwave launcher comprises oscillator, isolator, variable attenuator, directional coupler, wave detector, data acquisition circuit and emitting antenna; Oscillator, isolator, variable attenuator, directional coupler connect successively, and directional coupler one tunnel output connects wave detector, and wave detector output connects data acquisition circuit, and another road output of directional coupler connects emitting antenna;
The microwave signal that oscillator produces by directional coupler be divided into two paths of signals ，Yi road signal after wave detector as with reference to passage output signal; Another road signal to tested valve upstream space, regulates the emissive power of measuring system via emitting antenna by variable attenuator.
4. the gas pipe line valves leakage pick-up unit based on microwave technology according to claim 1, is characterized in that described microwave receiving device is comprised of receiving antenna, wave detector and data acquisition circuit; Receiving antenna output connects wave detector, and wave detector output connects data acquisition circuit.
5. the gas pipe line valves leakage pick-up unit based on microwave technology according to claim 1, the electric principle that it is characterized in that the gas pipe line valves leakage pick-up unit based on microwave technology is: the SMA interface of oscillator HMC513LP5 is connected by concentric cable with the SMA interface of isolator MTG801A, the SMA interface of isolator MTG801A is connected by concentric cable with the SMA interface of variable attenuator 8495B, the SMA interface of variable attenuator 8495B is connected by concentric cable with the SMA interface 1 of directional coupler 87310B, the SMA interface 2 of directional coupler 87310B is connected by concentric cable with the SMA interface of emitting antenna RF, the SMA interface 3 of directional coupler 87310B is connected by concentric cable with the SMA interface of wave detector 8474C, the SMA interface of data acquisition circuit A/D is connected by concentric cable with the SMA interface of wave detector 8474C, R232 interface according to Acquisition Circuit A/D is connected by R232 connecting line with PC computing machine R232 interface, the SMA interface of receiving antenna RF is connected by concentric cable with the SMA interface of wave detector 8474C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320484788.9U CN203455138U (en) | 2013-08-09 | 2013-08-09 | Gas pipeline valve inner leakage detection apparatus based on microwave technologies |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320484788.9U CN203455138U (en) | 2013-08-09 | 2013-08-09 | Gas pipeline valve inner leakage detection apparatus based on microwave technologies |
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| CN203455138U true CN203455138U (en) | 2014-02-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737316A (en) * | 2019-03-18 | 2019-05-10 | 新疆大全新能源股份有限公司 | A kind of Isolated Shield device and method of valves leakage |
| CN113390575A (en) * | 2020-03-13 | 2021-09-14 | 宁波方太厨具有限公司 | Water leakage detection method, water leakage detection device and water purification equipment |
| CN114518205A (en) * | 2022-01-07 | 2022-05-20 | 中铁工程装备集团有限公司 | Sealing ring cavity leakage detection device for shield tail of heading machine and heading machine |
-
2013
- 2013-08-09 CN CN201320484788.9U patent/CN203455138U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737316A (en) * | 2019-03-18 | 2019-05-10 | 新疆大全新能源股份有限公司 | A kind of Isolated Shield device and method of valves leakage |
| CN113390575A (en) * | 2020-03-13 | 2021-09-14 | 宁波方太厨具有限公司 | Water leakage detection method, water leakage detection device and water purification equipment |
| CN114518205A (en) * | 2022-01-07 | 2022-05-20 | 中铁工程装备集团有限公司 | Sealing ring cavity leakage detection device for shield tail of heading machine and heading machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211111 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 China Petroleum Building, No. 9, Dongzhimen North Street, Dongcheng District, Beijing Patentee before: PETROCHINA Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |