CN107219043A - A kind of water-sensitive sensor and its application method in underground piping leak water detdction - Google Patents
A kind of water-sensitive sensor and its application method in underground piping leak water detdction Download PDFInfo
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- CN107219043A CN107219043A CN201710362249.0A CN201710362249A CN107219043A CN 107219043 A CN107219043 A CN 107219043A CN 201710362249 A CN201710362249 A CN 201710362249A CN 107219043 A CN107219043 A CN 107219043A
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- water
- wire
- sensitive sensor
- shell
- inspection shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a kind of water-sensitive sensor and its application method in underground piping leak water detdction.Water-sensitive sensor is made up of parts such as shell, casing cover, screw, insulating barrier, wire, hydro-expansive rubber block and metal tongues.The wired in series of the tape insulation layer of water-sensitive sensor certain length is got up, a water-sensitive sensor string is constituted.Water-sensitive sensor string is laid along below pipeline, and is buried in the earth together with pipeline.One inspection shaft with cover is set at a certain distance, and the wire of water-sensitive sensor string two ends tape insulation layer is fixed in inspection shaft.The electric current of the wire of two tape insulation layers, voltage, the resistivity of wire, the cross-sectional area of wire of recycling universal meter battery are flowed through in inspection shaft when carrying out pipe leakage detection with universal meter measurement, it is possible to it is determined that from inspection shaft to pipe leakage point distance.
Description
Technical field
The present invention relates to a kind of water-sensitive sensor and its application method in underground piping leak water detdction.
Background technology
China is a water resource very country in short supply, and national each city takes plan to supply water and running water price adjustment etc.
Measure, to promote using water wisely.But underground running water pipeline seepy question not yet causes most attention.Underground running water tube leakage
It is difficult to discover, but loss is surprising.The a large amount of leaks throughout the year of underground running water pipe, cause water resource waste, are made to country
Into huge economic losses, or even road, Housing foundation subsidence can be caused, threaten the safety of people's lives and properties.Currently, China
Domestic underground water pipe leakage detection method is mainly using traditional passive maintenance method and audition method.The former is to find substantially
After leakage, staff is just sent to go a kind of method of maintenance, this method has certain hysteresis quality, is unfavorable for water resource
Effective protection.The latter is the position that sound is produced according to underground piping leak, and the side at Pipeline Leakage Point position is inferred on ground
Method, this method will determine that correct leaking area is relatively difficult in the case where the tonal variations scope of sound is excessive；Sometimes
There is certain areal variation at the leak sound between leakage point, the experience dependence to testing staff is big；In heavy traffic
Etc. noisy area, noise jamming is stronger, is not suitable for listening method using sound；In the weaker place of sound, audition method should not be also used.
Improved although audition method is many-sided, the technical merit of instrument performance and testing staff have large increase, but still exist
Some shortcomings, especially noise are larger, and interference signal is stronger, when pipe laying is too deep, are accurately positioned leak place and do not allow
Easily.
A kind of new underground pipeline water leakage detection method is resistance detection method, and it is to be close to water-supply-pipe parallel laid that specific practice, which is said,
If the certain thin resistance wire of two uniform thickness, resistivity, single resistance filament length degree and water pipe are isometric, it is known that its length and electricity
Resistance.The absorbent material (can be placed on saturation by the drying absorbent material that placing suction between resistance wire and water pipe has NaCl crystal
In NaCl solution, then dry), the certain dc source of voltage is placed between water pipe one end, two resistance wires.When the leakage of water pipe point
During water, the NaCl dissolution of crystals in absorbent material, so as to form conductive salt bridge, circuit between two parallel resistances silk at leakage point
Voltage and electric current between conducting, two resistance wires of measurement, leakage point can be calculated to end points resistance wire resistance by voltammetry.It is fixed according to resistance
Rule, resistance wire resistance is directly proportional to length, so as to obtain distance of the leakage point apart from resistance wire end points.But because NaCl crystal is met
The solution concentration formed after water has differences, therefore the resistance value of the solution of two resistance wires of connection is not a fixed number, by
There is very big difference in the resistance wire resistance of this obtained leakage point to end points, it is seen that this method can not be accurately positioned leakage point
Position.
The content of the invention
In view of the above-mentioned problems, the invention provides a kind of water-sensitive sensor and its use in underground piping leak water detdction
Method.Water-sensitive sensor is by portions such as shell, casing cover, screw, insulating barrier, wire, hydro-expansive rubber block and metal tongues
Part is constituted.Many long and narrow water inlets are provided with shell.One piece of hydro-expansive rubber block is placed in the bottom of shell, covers swollen in chance water
Above swollen block rubber is metal tongue.It is the wire of two two ends tape insulation layers above metal tongue.Insulating barrier and lead
Wire clamp is fixed between shell and casing cover by 4 screws.
The wired in series of the tape insulation layer of above-mentioned water-sensitive sensor certain length is got up, a water-sensitive sensor is constituted
String.Water-sensitive sensor string is laid along below pipeline, and is buried in the earth together with pipeline.One basement with cover is set at a certain distance
Well, the wire of water-sensitive sensor string two ends tape insulation layer is fixed in inspection shaft.
When being embedded in the pipe leakage of underground, water is progressively seeped into water-sensitive sensor proximity, and entering by water-sensitive sensor
The mouth of a river enters the inside of shell.Hydro-expansive rubber block water-swellable therein, volume becomes rapidly big, promote metal tongue with
Two conductive contacts, and be allowed to turn on.Carry out opening inspection well cover during pipe leakage detection, flowed through with universal meter measurement two in inspection shaft
The electric current of the wire of root tape insulation layer.Thus voltage, the resistivity of wire, the cross-sectional area of wire of universal meter battery are utilized,
It is assured that the distance of the point from inspection shaft to pipe leakage.
The beneficial effects of the present invention are：
1st,, can be accurate without excavating ground by resistance measurement length using conductor resistance and the linear relationship of length
The position of pipe leakage point is determined, labour cost is both saved, the clean and tidy of urban environment can be kept again；
2nd, water-sensitive sensor, which meets metal tongue after water, makes the conducting of two wires, due to metal tongue resistance very little and
Change is not susceptible to, therefore the present invention can accurately determine the position of leakage point.
Brief description of the drawings
Fig. 1 is the outside drawing that water-sensitive sensor is connected with tape insulation layer conductor；Fig. 2 is water-sensitive sensor internal structural representation
Figure.
Label declaration：
1 shell, 2 casing covers, 3, screw, 4 water inlets, 5 insulating barriers, 6 wires, 7 hydro-expansive rubber blocks, 8 metal tongues
Piece
Embodiment
As shown in Figure 1, 2, water-sensitive sensor by shell (1), casing cover (2), screw (3), insulating barrier (5), wire (6),
The part such as hydro-expansive rubber block (7) and metal tongue (8) is constituted.Many long and narrow water inlets (4) are provided with shell (1),
Once pipe leakage, it is internal that the water spilt can enter shell (1) by water inlet (4).Place one piece in the bottom of shell (1)
Hydro-expansive rubber block (7), cover hydro-expansive rubber block (7) above be metal tongue (8).Metal tongue (8)
While being fixed on by screw (3) on shell (1), its excess-three side can activity.Metal tongue (8) is above that two two ends bands are exhausted
In the wire (6) of edge layer (5), the half insertion shell (1) of insulating barrier (5), in second half insertion casing cover (2).Cover shell
Lid (2) is simultaneously loaded onto after 4 screws (3), and insulating barrier (5) and wire (6) are sandwiched between shell (1) and casing cover (2).
Above-mentioned water-sensitive sensor is concatenated with the wire (6) of the tape insulation layer (5) of certain length, a water-sensitive is constituted and passes
Sensor string.Water-sensitive sensor string is laid along below pipeline, and is buried in the earth together with pipeline.Setting one is with cover at a certain distance
Inspection shaft, the wire (6) of water-sensitive sensor string two ends tape insulation layer (5) is fixed in inspection shaft.
When being embedded in the pipe leakage of underground, water is progressively seeped into water-sensitive sensor proximity, and entering by water-sensitive sensor
The mouth of a river (4) enters the inside of shell (1).Hydro-expansive rubber block (7) water-swellable therein, volume becomes rapidly big, promotes gold
Category tongue (8) is contacted with two wires (6), and is allowed to turn on.
Carry out opening inspection well cover during pipe leakage detection, two tape insulations layer (5) are flowed through in inspection shaft with universal meter measurement
The electric current I of wire (6).The voltage of universal meter battery is represented with V, then from inspection shaft to pipe leakage point each wire (6) resistance
For V/ (2I).On the other hand, represent the resistivity of wire (6) with ρ, S represents the cross-sectional area of wire (6), L represent from inspection shaft to
The distance of pipe leakage point, then the resistance of each wire (6) is ρ L/S, therefore the distance of point is from inspection shaft to pipe leakage
。
Claims (2)
1. a kind of water-sensitive sensor and its application method in underground piping leak water detdction, it is characterised in that：Water-sensitive sensor
By shell (1), casing cover (2), screw (3), insulating barrier (5), wire (6), hydro-expansive rubber block (7) and metal tongue
(8) the part composition such as；Many long and narrow water inlets (4) are provided with shell (1), once pipe leakage, the water spilt can pass through
It is internal that water inlet (4) enters shell (1)；One piece of hydro-expansive rubber block (7) is placed in the bottom of shell (1), covers in water-swellable
Block rubber (7) above be metal tongue (8)；One side of metal tongue (8) is fixed on shell (1) by screw (3), its
Excess-three side can activity；Metal tongue (8) is the wire (6) of two two ends tape insulation layers (5), the one of insulating barrier (5) above
In half embedded shell (1), in second half insertion casing cover (2)；Cover casing cover (2) and load onto after 4 screws (3), insulating barrier
(5) it is sandwiched in wire (6) between shell (1) and casing cover (2)；When being embedded in the pipe leakage of underground, water is progressively seeped into water
Near dependent sensor, and the inside for water inlet (4) the entrance shell (1) for passing through water-sensitive sensor；Hydro-expansive rubber therein
Block (7) water-swellable, volume becomes rapidly big, promotes metal tongue (8) to be contacted with two wires (6), and be allowed to turn on.
2. a kind of water-sensitive sensor according to claim 1 and its application method in underground piping leak water detdction, its
It is characterised by：Water-sensitive sensor is together in series with the wire (6) of the tape insulation layer (5) of certain length, constitutes a water-sensitive sensor
String；Water-sensitive sensor string is laid along below pipeline, and is buried in the earth together with pipeline；One basement with cover is set at a certain distance
Well, the wire (6) of water-sensitive sensor string two ends tape insulation layer (5) is fixed in inspection shaft；Carry out opening basement during pipe leakage detection
Well lid, the electric current I of the wire (6) of two tape insulation layers (5) in inspection shaft is flowed through with universal meter measurement；Universal meter battery is represented with V
Voltage, then from inspection shaft to pipe leakage point each wire (6) resistance be V/ (2I)；On the other hand, wire (6) is represented with ρ
Resistivity, S represents the cross-sectional area of wire (6), L represents the distance of the point from inspection shaft to pipe leakage, then each wire (6)
Resistance is ρ L/S, and from inspection shaft to pipe leakage, the distance of point is
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362249.0A CN107219043A (en) | 2017-05-15 | 2017-05-15 | A kind of water-sensitive sensor and its application method in underground piping leak water detdction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362249.0A CN107219043A (en) | 2017-05-15 | 2017-05-15 | A kind of water-sensitive sensor and its application method in underground piping leak water detdction |
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| CN107219043A true CN107219043A (en) | 2017-09-29 |
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| CN201710362249.0A Pending CN107219043A (en) | 2017-05-15 | 2017-05-15 | A kind of water-sensitive sensor and its application method in underground piping leak water detdction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692866A (en) * | 2018-04-04 | 2018-10-23 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device |
| CN108918031A (en) * | 2018-04-04 | 2018-11-30 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device with drying function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128148A (en) * | 1984-11-27 | 1986-06-16 | Sumitomo Electric Ind Ltd | Sensor for detecting leaked water from water distributing pipe |
| CN202854350U (en) * | 2012-10-15 | 2013-04-03 | 中煤平朔集团有限公司 | Resistance-type minded-out water accumulation detecting instrument |
| CN203398007U (en) * | 2013-06-20 | 2014-01-15 | 宁波圣莱达电器股份有限公司 | Power switch capable of rapidly cutting off power in case of water |
| CN103758437A (en) * | 2014-02-18 | 2014-04-30 | 江苏建筑职业技术学院 | Waterproof rainproof threshold |
| CN204083824U (en) * | 2014-10-08 | 2015-01-07 | 西安科技大学 | Buried type pipe leakage automatic measuring unit |
| CN204988665U (en) * | 2015-10-08 | 2016-01-20 | 西安科技大学 | Heat supply pipeline leak testing analogue means |
| CN106015953A (en) * | 2016-08-04 | 2016-10-12 | 深圳凌水环保科技股份有限公司 | Water feed and drainage pipe as well as leakage detection system and detection method thereof |
| CN205957301U (en) * | 2016-08-05 | 2017-02-15 | 倪晨钧 | Pipeline monitoring system |
-
2017
- 2017-05-15 CN CN201710362249.0A patent/CN107219043A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128148A (en) * | 1984-11-27 | 1986-06-16 | Sumitomo Electric Ind Ltd | Sensor for detecting leaked water from water distributing pipe |
| CN202854350U (en) * | 2012-10-15 | 2013-04-03 | 中煤平朔集团有限公司 | Resistance-type minded-out water accumulation detecting instrument |
| CN203398007U (en) * | 2013-06-20 | 2014-01-15 | 宁波圣莱达电器股份有限公司 | Power switch capable of rapidly cutting off power in case of water |
| CN103758437A (en) * | 2014-02-18 | 2014-04-30 | 江苏建筑职业技术学院 | Waterproof rainproof threshold |
| CN204083824U (en) * | 2014-10-08 | 2015-01-07 | 西安科技大学 | Buried type pipe leakage automatic measuring unit |
| CN204988665U (en) * | 2015-10-08 | 2016-01-20 | 西安科技大学 | Heat supply pipeline leak testing analogue means |
| CN106015953A (en) * | 2016-08-04 | 2016-10-12 | 深圳凌水环保科技股份有限公司 | Water feed and drainage pipe as well as leakage detection system and detection method thereof |
| CN205957301U (en) * | 2016-08-05 | 2017-02-15 | 倪晨钧 | Pipeline monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692866A (en) * | 2018-04-04 | 2018-10-23 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device |
| CN108918031A (en) * | 2018-04-04 | 2018-11-30 | 芜湖捷欧汽车部件有限公司 | A kind of water spray for automobile pot detection device with drying function |
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Application publication date: 20170929 |
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