CN205560296U - Water supply and drainage pipe leak testing system - Google Patents
Water supply and drainage pipe leak testing system Download PDFInfo
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- CN205560296U CN205560296U CN201620123176.0U CN201620123176U CN205560296U CN 205560296 U CN205560296 U CN 205560296U CN 201620123176 U CN201620123176 U CN 201620123176U CN 205560296 U CN205560296 U CN 205560296U
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Abstract
The utility model discloses a water supply and drainage pipe leak testing system contains: compound pipe, equipment, equipment is equipped with detection circuitry, compound pipe contains the inner insulating layer, external insulation layer to and set up the conducting layer between the inner insulating layer and external insulation layer, the two poles of the earth connecting conductive layer of equipment, equipment still are equipped with an earthing pole, and the earthing pole setting is worked as in the medium of compound outside of tubes whole or the insulating outer emergence of compound pipe wall is damaged, and equipment changes to ground insulation resistance. The utility model discloses early prediction takes place to take place when damaged and to the effect of damage department accurate positioning, has improved the prevention ability greatly and salvageed efficiency water supply and drainage pipeline for the realization.
Description
Technical field
This utility model relates to water supply and sewerage pipeline leak water detdction technical field, particularly relate to one to
Drain pipe leak detection system.
Background technology
Urban Buried Pipeline Network is the buried blood vessel in underground in city, rises emphatically in urban construction
The effect wanted.Water supply line, flowing line, natural gas line etc. is embedded in underground for a long time
Each play a different role.Because the planning of early stage urban Underground pipeline is the most backward, distribution situation
Numerous and complicated and the buried pipeline that causes in underground are difficult to be managed collectively, and also give new city later
City's construction has manufactured many problems.Extend service in the army, pipeline is aging, geology changes, it is bad to construct
The underground piping leakage easily caused etc. situation, is the huge challenge during pipe network operation is safeguarded.By
It is difficult to position and monitor in underground piping leakage, and more hidden being difficult to of premature leak finds in time,
Bring challenge also to the safe operation of underground piping and maintenance and repair.
Metropolitan subdrainage pipe network is widely distributed, and length is even up to thousands of miles.And work as
Front water supply network Leak Detection mainly manually patrols and examines, vehicle-mounted patrol and examine, common people's feedback etc. is passive
Method processes.Therefore the daily manual inspection of pipeline network leak and the vehicle-mounted workload patrolled and examined are very
Heavy, and can not accomplish to leak detection in time.
The technological means that specialty underground piping detection uses is mainly by audition method, professional
Judge that the leakage audio frequency in pipeline positions by hearing prosthesis.The method is by environment shadow
Ringing big, general detection needs to be selected in the night that noise is relatively small, and testing result relies on artificial judgment.
Audition legal position leakage distance also has much relations with material, and pipe material is different, certainty of measurement
Differ greatly.And the method is confined to only when leakage in pipeline could when reaching to a certain degree
Leakage is judged, it is impossible to find that in leakage and implement countermeasure in early days by sound.
Summary of the invention
In view of this, the technical problems to be solved in the utility model is to provide a kind of supplying drainage and lets out
Missing inspection examining system, with solve in prior art supplying drainage breakage leakage unpredictable, damaged after
The problem that damage location, detection cumbersome, detection equipment are complicated cannot be detected in time.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is as follows:
A kind of supplying drainage leak detection system, comprises multiple tube, leak detecting device, described
Leak detecting device is provided with testing circuit；Described multiple tube comprises inner insulating layer, external insulation layer,
And it is arranged at the conductive layer between described inner insulating layer and external insulation layer；Described Leak Detection fills
Putting the described conductive layer of connection, described leak detecting device is additionally provided with an earthing pole, described earthing pole
It is arranged in the medium outside multiple tube, when described compound tube wall is overall or insulating outer layer occurs broken
Damage, the insulation against ground resistance of leak detecting device vary more than preset value.
Further, described leak detecting device comprises power subsystem, signal generating unit, inspection
Survey unit, processing unit and the electrical connection of medium outer with multiple tube and multiple tube.
Further, described signal generating unit is used for providing detection signal for testing circuit；Institute
Stating detector unit resistance to earth change in testing circuit, described processing unit judges described
Whether change is beyond preset value, and makes the judgement that pipeline is the most damaged；Signal generating unit is even
Connect detector unit, form measure loop with the conductive layer of multiple tube；Described signal generating unit is also
Connect processing unit and earthing pole.
Further, also comprising display unit or communication unit, described display unit is used for showing
The change of described detection signal；Described communication unit is for being transferred to long-range end by detection information
End.
Further, the testing circuit in described leak detecting device comprises signal source, and total road is opened
Close K1, branch switch K2；Described signal source is connected with total way switch K1 and is connected bus respectively
+ KM and earthing pole；Branch switch K2 and resistance R1, electric capacity C1 connect, and with resistance R2
Earth.
Further, described signal generating unit uses alternating current-direct current signal source.
The supplying drainage leak detection system that this utility model realizes, can realize following useful
Effect:
1, to pipe leakage, the accurate detection of pipeline early seepage；
2, effectively underground piping can be detected and position, reduce pipeline from underground
The workload of excavation maintenance；
3, detection method is affected by environment less, can improve work efficiency.
4, expansibility is strong, can realize a range of pipe network by expanding unit
Condition monitoring.
If 5 pipeline outer walls are damaged and leak, the method still can carry out judging also
Location, as now carried out early warning and suitably processing, by more valuable.
Accompanying drawing explanation
Fig. 1 is this utility model composite pipe structure schematic diagram；
Fig. 2 is this utility model leak detection system structural representation；
Fig. 3 is this utility model Leak Detection circuit diagram；
Fig. 4 is that this utility model leaks detection and localization schematic diagram.
Detailed description of the invention
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect more
Add clear, clear, below in conjunction with drawings and Examples, this utility model is carried out the most in detail
Describe in detail bright.Should be appreciated that specific embodiment described herein is only in order to explain that this practicality is new
Type, is not used to limit this utility model.
A kind of supplying drainage leak detection system, as in figure 2 it is shown, comprise answering as shown in Figure 1
Close pipe, in multiple tube, be provided with fluid conductive medium 4；Described multiple tube comprise inner insulating layer 1,
External insulation layer 3, and it is arranged at the conductive layer between described inner insulating layer 1 and external insulation layer 3
2, described conductive layer can be metal level or other conducting medium layers, described inner insulating layer and
External insulation layer is insulating polymer material, and described multiple tube is as supplying drainage, and general inside is
Tap water or sewage, but for other conductive medium in being not excluded for described multiple tube；And let out
Device for detecting leakage, the two poles of the earth of described leak detecting device connect the conductive layer 2 of multiple tube, and lead
Electric layer holding point connects.Described leak detecting device is additionally provided with an earthing pole, and described earthing pole sets
Putting in the medium outside multiple tube, described medium generally fills soil；When described compound tube wall is whole
There is breakage in body or insulating outer layer, then it represents that the conducting medium outflow in multiple tube, or compound
Filled media outside pipe there occurs with conductive layer 2 and contacts, the insulation against ground electricity of leak detecting device
Resistance changes, i.e. the insulation against ground level of multiple tube changes.
Specifically, as in figure 2 it is shown, described leak detecting device 100 comprises power subsystem
60, signal generating unit 10, detector unit 20, processing unit 30 and with multiple tube and
The electrical connection of the outer medium of multiple tube.Described signal generating unit 10 is used for providing for testing circuit
Detection signal.Described power subsystem 60 provides detection electric current for leak detecting device.Described inspection
Surveying the unit 20 resistance to earth change in testing circuit, described processing unit 30 judges institute
State whether change exceeds preset value, and make the judgement that pipeline is the most damaged；Signal generating unit
10 connect detector unit 20, form measure loop with the conductive layer of multiple tube；Described signal is sent out
Raw unit 10 is also connected with processing unit 30 and earthing pole.
Show the testing result of leak detecting device for convenience, also comprise display unit；In order to
The testing result energy very first time making leak detecting device be monitored people understand, also set up communication list
Unit, described communication unit is for being transferred to remote terminal by detection information.
Described leak detecting device is provided with testing circuit as shown in Figure 3.Described Leak Detection fills
Put interior testing circuit and comprise signal source, total way switch K1, branch switch K2；Described signal
Connect with total way switch K1 and be connected bus+KM and earthing pole respectively in source；Branch switch K2 with
Resistance R1, electric capacity C1 connect, and with resistance R2 earth.
When signal source is direct current, electric capacity C1 is carried out by Guan Bi K1, K2 by power of alterating and direct current
Charging.
From RC circuit counting:
Assume: V0 is the initial voltage value on electric capacity；V1 is the voltage that electric capacity finally can be charged to or be put into
Value；Vt is the magnitude of voltage on t electric capacity.
Then: Vt=V0+ (V1-V0) * [1-exp (-t/RC)], t=RC*Ln [(V1-V0)/(V1-Vt)]
Assume: V0=0, V1=VCC, Vt=0.9VCC, then simplification of a formula is t/RC=ln (10)
Owing to ln10 approximates 2.3 namely t=2.3RC
Then can calculate the time t that electric capacity is fully charged.
Disconnecting K1 when fully charged, electric capacity C1 initial voltage is E.Tested loop has been encouraged sensing
Electromotive force E, and produce electric current I in the loop, resistance to earth can be calculated by detection discharge current
R2.When pipe leakage, multiple tube resistance variations reaches preset value, then judge that multiple tube occurs
Leakage, as required, arranges alarm device and positioner for system, and described alarm device is sent out
Going out alarm signal, described positioner starts positioning function, locks concrete leak position point.
When signal source is for exchange, by sending out every straight coupling electric capacity in alternating current-direct current signal source system
Send low frequency signal.The pipeline ground connection when there is pipe leakage, low frequency signal forms path over the ground.
Loop is flow through low-frequency current, the detection resistance R2 within device produces low-frequency voltage, passes through
Phase-sensitive detector calculates the leakage current values of insulation against ground resistance.Alternating voltage letter according to superposition
Number amplitude and this leakage current values, calculate insulation against ground resistance.
After confirming pipe leakage, characteristic electromagnetic ripple method is used to carry out leakage location such as Fig. 4, pipe
Two ends, road are installed and are launched and receive unit 70.Because pipe interior metal structure is uniformly distributed, single
One direction input electromagnetic wave, can produce corresponding interference waveform, i.e. when electromagnetic wave is transmitted to leakage point
The exact position residing for location of leak A can be drawn.
Optionally, the method that pipe leakage location also can be selected for crosstalk analysis, end reflects is to leakage
Place positions.
Optionally, pipeline leakage testing device also can be equipped with display unit, by display lamp or liquid
Brilliant display unit is used for testing result is carried out very first time display.
Optionally, pipeline leakage testing device can be equipped with storage and communication unit as required, uses
With other units or computer system carry out data cube computation and mutual, based on detection dress
The data putting offer realize more functional application.
The leak detection system of implementation above, arranges leak detecting device on multiple tube, passes through
The situation of change of leak detecting device detection resistance to earth, when the change of resistance to earth reaches default
During value, i.e. judge that pipeline occurs breakage, it is judged that method is accurate, detect the simple low cost of device,
Can also be when only there is part surface insulation layer breakage in multiple tube, so that it may send information warning,
People can be made to make the decision of pipe-line maintenance in advance, it is also possible to the most broken at pipeline generation tube wall
During damage, accurately determine damage location, help quickly location, greatly accelerate first-aid repair efficiency.
Illustrate preferred embodiment of the present utility model above by reference to accompanying drawing, not thereby limit to this
The interest field of utility model.Those skilled in the art are without departing from scope of the present utility model and reality
Any amendment, equivalent and the improvement made in matter, all should be at right model of the present utility model
Within enclosing.
Claims (6)
1. a supplying drainage leak detection system, comprises multiple tube, leak detecting device, and described leak detecting device is provided with testing circuit；Described multiple tube comprises inner insulating layer, external insulation layer, and is arranged at the conductive layer between described inner insulating layer and external insulation layer；Described leak detecting device connects described conductive layer, and described leak detecting device is additionally provided with an earthing pole, and described earthing pole is arranged in the medium outside multiple tube.
Supplying drainage leak detection system the most according to claim 1, it is characterised in that: described leak detecting device comprises power subsystem, signal generating unit, detector unit, processing unit and the electrical connection of medium outer with multiple tube conductive layer and multiple tube.
Supplying drainage leak detection system the most according to claim 2, it is characterised in that: described signal generating unit is for providing detection signal for testing circuit；The resistance to earth change in testing circuit of the described detector unit, described processing unit is for making the judgement that pipeline is the most damaged；Signal generating unit connects detector unit, forms measure loop with the conductive layer of multiple tube；Described signal generating unit is also connected with processing unit and earthing pole.
Supplying drainage leak detection system the most according to claim 2, it is characterised in that: also comprising display unit or communication unit, described display unit is for showing the change of described detection signal；Described communication unit is for being transferred to remote terminal by detection information.
Supplying drainage leak detection system the most according to claim 1, it is characterised in that: the testing circuit in described leak detecting device comprises signal source, total way switch K1, branch switch K2；Described signal source is connected with total way switch K1 and is connected bus+KM and earthing pole respectively；Branch switch K2 and resistance R1, electric capacity C1 connect, and with resistance R2 earth.
Supplying drainage leak detection system the most according to claim 2, it is characterised in that: described signal generating unit uses alternating current-direct current signal source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123176.0U CN205560296U (en) | 2016-02-16 | 2016-02-16 | Water supply and drainage pipe leak testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123176.0U CN205560296U (en) | 2016-02-16 | 2016-02-16 | Water supply and drainage pipe leak testing system |
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| CN205560296U true CN205560296U (en) | 2016-09-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465614A (en) * | 2016-02-16 | 2016-04-06 | 深圳凌水环保科技股份有限公司 | Water supply and drainage pipe leakage detecting system and method |
| CN107061999A (en) * | 2017-06-09 | 2017-08-18 | 中国石油大学(华东) | A kind of Leak Detection in Oil Pipeline Using device and detection method |
| CN107143753A (en) * | 2017-07-19 | 2017-09-08 | 广东中科华冉智网科技有限公司 | The drainage pipeline networks and detection method of detectable leak |
| CN111336409A (en) * | 2018-12-19 | 2020-06-26 | 福建纳川管业科技有限责任公司 | Plastic pipe with double-layer conductive layer |
-
2016
- 2016-02-16 CN CN201620123176.0U patent/CN205560296U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465614A (en) * | 2016-02-16 | 2016-04-06 | 深圳凌水环保科技股份有限公司 | Water supply and drainage pipe leakage detecting system and method |
| CN107061999A (en) * | 2017-06-09 | 2017-08-18 | 中国石油大学(华东) | A kind of Leak Detection in Oil Pipeline Using device and detection method |
| CN107143753A (en) * | 2017-07-19 | 2017-09-08 | 广东中科华冉智网科技有限公司 | The drainage pipeline networks and detection method of detectable leak |
| CN111336409A (en) * | 2018-12-19 | 2020-06-26 | 福建纳川管业科技有限责任公司 | Plastic pipe with double-layer conductive layer |
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