CN104266087A - In-ground type tap water pipeline leak detection device and detection method - Google Patents
In-ground type tap water pipeline leak detection device and detection method Download PDFInfo
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- CN104266087A CN104266087A CN201410524771.0A CN201410524771A CN104266087A CN 104266087 A CN104266087 A CN 104266087A CN 201410524771 A CN201410524771 A CN 201410524771A CN 104266087 A CN104266087 A CN 104266087A
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Abstract
The invention discloses an in-ground type tap water pipeline leak detection device. The in-ground type tap water pipeline leak detection device comprises a leak measuring head which is buried inside a water leak detection area and a leak detection circuit which is connected with the leak measuring head; the leak detection head is a humidity detection measuring head; the leak measuring head comprises two leads which are arranged in a parallel mode; insulating layers cover external sides of the leads; a plurality of conductive points are distributed on the two leads; the leak detection circuit is a resistance value detection circuit which detects a resistance value between the two leads. The in-ground type tap water pipeline leak detection device has the advantages that the structure is simple, the distribution is simple and convenient, the detection effect is good, and a structure of a to-be-detected pipeline is not required to be adjusted. The invention also discloses a leak detection method. The lead detection method comprises the following steps of a first step, burying the leak measuring head and burying the leak measuring head in the water leak detection area when a to-be-detected tap water pipeline is buried; a second step, connecting the leak detection circuit; a third step, performing water leak detection. The in-ground type tap water pipeline leak detection device has the advantages that the steps are simple, the design is reasonable, the structure of the to-be-detected pipeline is not required to be changed, and the detection accuracy is high.
Description
Technical field
The invention belongs to Discussion on Pipe Leakage Detection Technology field, especially relate to a kind of buried type water supply pipe leak detecting device and detecting method.
Background technique
In modern architecture, water supply line is buried in building more, leak and not easily find, and leak position is also difficult to determine.The leakage detection method of conventional water supply line has listens leakage method, hydrostatic(al) process and electric-resistivity method etc.Wherein, listen leakage method to be adopt when outside environment quiet to listen leakage device to be close to from the ground close to pipeline by probe, the faint sound wave leaked is amplified, then passes in receiver, make people obtain the information of leaking.Leakage method is listened to have higher requirements to environment and accuracy is low.And hydrostatic(al) process is by pipeline pressurization, measures and want the change of the pressure between testing pipes to judge whether pipeline leaks; This method needs to change pipeline configuration, namely on the pipeline detected, adds three-way valve etc., and general needs obtains from the pipeline basseted the information of leaking.Whether electric-resistivity method detects when being embedded in the pipeline of underground, having plenty of the specific resistance detecting drilling point on the ground to underground punching, but then cannot arbitrarily beat many holes to detect at building or some places and leak; The electric-resistivity method also had is in pipeline and pipeline arranges conductive electrode outward, detect two-stage resistance, this method needs in pipeline, arrange longer electrode cable, and the adpting flange of pipeline also needs to add the module by wire, thus needs the structure changing pipe interior structure and adpting flange.To sum up, there is the problems such as need change pipeline configuration, detect inconvenience, accuracy in detection is lower all to some extent in the leakage detection method of existing water supply line.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, provide that a kind of structure is simple, reasonable in design, input cost is lower and install lay simple, use easy and simple to handle, that using effect is good buried type water supply pipe leak detecting device.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of buried type water supply pipe leak detecting device, it is characterized in that: comprise the leakage gauge head be embedded in leak water detdction district and the Leak testtion circuit connected with leakage gauge head, the humidity detecting gauge head of described leakage gauge head for detecting the buried object humidity at installation position place of institute; Described leakage gauge head comprises two are all coated with isolation layer wire in parallel laying and outside, two described wires are respectively the first wire and the second wire, described first wire is laid with multiple first conductiving point from front to back, described first conductiving point be by the first wire outside isolation layer remove after formed bare spots; Described second wire is laid with multiple second conductiving point from front to back, described second conductiving point be by the second wire outside isolation layer remove after formed bare spots; Multiple described first conductiving point and multiple described second conductiving point are in being laid staggeredly; Described Leak testtion circuit is the resistance value testing circuit detected the resistance between the first wire and the second wire.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: the upper end of described first wire and the second wire all extend out to outside described leak water detdction district, the lower end of described first wire is first conductiving point, and the lower end of the second wire is second conductiving point.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: the quantity that the need in described leak water detdction district carry out the water supply pipe to be detected of Leak testtion is one or more, and described water supply pipe to be detected is imbed the pipe section in leak water detdction district.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: when the quantity of the water supply pipe to be detected in described leak water detdction district is one, described first wire and the second wire are all parallel with described water supply pipe to be detected, and the first wire and the spacing between the second wire and described water supply pipe to be detected are 5cm ~ 10cm; When the quantity of the water supply pipe to be detected in described leak water detdction district is multiple, described first wire and the distance between the second wire and multiple described water supply pipe to be detected are all not more than D, and wherein D is 8cm ~ 20cm.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: described leakage gauge head is gauge head water supply pipe to be detected being carried out to leak water detdction, outside described water supply pipe to be detected, set quantity of leaking gauge head is one or more, and multiple described leakage gauge head is laid from front to back along the bearing of trend of described water supply pipe to be detected.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: the voltage detecting circuit that described Leak testtion circuit comprises power circuit, the resistor voltage divider circuit connected with power circuit and connects with resistor voltage divider circuit, described resistor voltage divider circuit is connected in series by testing resistance and divider resistance and forms, and described testing resistance is the resistance between the first wire and the second wire.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: described power circuit is DC electrical source, the positive pole of described DC electrical source connects the first wire, and the second wire is ground connection after described divider resistance, the minus earth of described DC electrical source; Described voltage detecting circuit is comparator, and the wiring point between described second wire and described divider resistance connects the normal phase input end of described comparator, inverting input ground connection after resistance R09 of described comparator.
Above-mentioned a kind of buried type water supply pipe leak detecting device, is characterized in that: also comprise the warning circuit connected with Leak testtion circuit; The quantity of described Leak testtion circuit is one or more, and multiple described Leak testtion circuit all connects with warning circuit;
Described warning circuit comprises the optical alarm circuit connected with Leak testtion circuit and the sound alarm circuit connected with described optical alarm circuit, and the quantity of described optical alarm circuit is identical with the quantity of Leak testtion circuit, and the quantity of described sound alarm circuit is one.
Above-mentioned a kind of buried type water supply pipe leak detecting device, it is characterized in that: multiple described first conductiving point and multiple described second conductiving point are all in evenly laying, and the spacing between adjacent two described first conductiving points in front and back and between adjacent two described second conductiving points in front and back is 15cm ~ 25cm; Spacing between described first wire and the second wire is 10cm ~ 20cm.
Meanwhile, the present invention also disclose a kind of method step simple, reasonable in design, without the need to changing detected pipeline configuration and the high buried type water supply pipe leakage detection method of accuracy in detection, it is characterized in that the method comprises the following steps:
Step one, leakage gauge head are buried underground: while burying underground water supply pipe to be detected, subterranean zone residing for water supply pipe to be detected is divided into one or more leak water detdction district, and in each leak water detdction district, bury one respectively underground leak gauge head, and by bury underground and leak the upper end of two wires in gauge head and all lead to outside earth's surface;
Step 2, Leak testtion circuit connect: by two wires of each leakage gauge head buried underground in step one, be connected respectively with Leak testtion circuit; Now, the resistance that Leak testtion electric circuit inspection goes out in each leakage gauge head between two wires is mega-ohms;
Step 3, leak water detdction: in water supply pipe using process to be detected described in step one, carry out leak water detdction by Leak testtion circuit respectively to each leak water detdction district, and the leakage detection method in all leak water detdction districts is all identical;
When leak water detdction is carried out to any one leak water detdction district, by Leak testtion circuit, the resistance in the leakage gauge head be laid in this leak water detdction district between two wires is detected: when detect show that the resistance leaked in gauge head between two wires is decreased to kilo-ohm level time, illustrate that this leak water detdction district exists water leakage situation.
The present invention compared with prior art has the following advantages:
1, the leak detecting device structure adopted is simple, reasonable in design, input cost is lower and installation is laid simple, mainly comprises and leaks gauge head and Leak testtion circuit.
2, the leakage measuring head structure adopted is simple, reasonable in design, input cost is lower and it is easy to lay, Detection results good, only leakage gauge head need be embedded in water supply pipe side to be detected, without the need to making any adjustments the structure of water supply pipe to be detected during actual use.Leak gauge head to be made up of two wires in parallel laying, two wires being embedded in underground are distributed with multiple metallic conduction point, and two wire upper ends are all drawn ground and connect with Leak testtion circuit.
3, the Leak testtion circuit adopted is simple, reasonable in design and easy-to-connect, Detection results are good, accuracy in detection is high, form primarily of power circuit, resistor voltage divider circuit and voltage detecting circuit, and Leak testtion circuit using in leak water detdction district lay the resistance value of leaking resistance between two wires in gauge head and be transformed to low and high level signal and whether leak and the foundation of reporting to the police as pipeline.
4, the warning circuit adopted is simple, reasonable in design and easy-to-connect, using effect are good, comprise optical alarm circuit and sound alarm circuit, the low and high level signal that optical alarm circuit corresponding to each leak water detdction district exports according to each district Leak testtion circuit carries out light warning, and sound alarm circuit all carries out sound alarm when water leakage situation appears in any one leak water detdction district.
5, adopt that to leak the laying mode of gauge head very flexible, both can share a leakage gauge head by multiple water supply pipe to be detected, and also can use multiple leakage gauge head by a water supply pipe to be detected, lay mode very flexible, can according to actual needs, lay flexibly.
6, the leakage detection method step adopted is simple, reasonable in design and realize convenient, and using effect is good, can easy, accurately Leak testtion is carried out to water supply pipe.
7, using effect is good and use value is high, using in each leak water detdction district lay the resistance value of leaking in gauge head between two wires and as signal source, pipe leakage detected, then pipeline leakage signal is transformed to voltage signal and exports to follow-up warning circuit.That is, using the signal source that the resistance change in the leakage gauge head being arranged in each leak water detdction district between two wires is leaked as testing pipes, the resistance value that correspondence is leaked in gauge head between two wires by the leak water detdction circuit in each leak water detdction district detects as signal source pipe leakage, then pipeline leakage signal is transformed to voltage signal and exports to warning circuit, the leakage situation of voltage signal to corresponding pipeline surveyed area (i.e. leak water detdction circuit) that warning circuit exports according to each Leak testtion circuit carries out light warning and sound alarm.Under normal circumstances, when pipeline leaks, the resistance value of leaking in gauge head between two wires is very large, does not report to the police when the resistance value of warning circuit between two wires is very large; When there is pipe leakage, because water is immersed in concrete, resistance value in leakage gauge head in corresponding leak water detdction district between two wires significantly declines, and now warning circuit is reported to the police because the resistance value between two wires diminishes, thus reaches the object of Leak testtion.To sum up, the present invention proposes a kind of simple, leak detecting device and method accurately and reliably, and automatic alarm prompting can be realized.The present invention is without the need to making any change to the structure of detected pipeline, only need be laid with the wire of multiple metallic conduction point when tubing other being arranged in parallel two of pipeline, zoning wiring can be carried out to same or different pipeline to detect, and can be detected the leakage situation of pipeline to be detected in corresponding leak water detdction district by Leak testtion circuit and warning circuit and automatic alarm shows.
In sum, structure of the present invention is simple, it is easy to lay and it is convenient to realize, Detection results is good, effectively can solve the problems such as the need that existing water supply line leakage inspector and method exist change pipeline configuration, detect inconvenience, accuracy in detection is lower.
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 adopts by the present invention the schematic block circuit diagram of buried type water supply pipe leak detecting device.
Fig. 2 is the installation position schematic diagram that gauge head is leaked in the present invention.
Fig. 3 adopts by the present invention the circuit theory diagrams of Leak testtion circuit and warning circuit.
Description of reference numerals:
1-leak gauge head; 1-1-the first wire; 1-11-the first conductiving point;
1-2-the second wire; 1-21-the second conductiving point; 2-Leak testtion circuit;
2-1-power circuit; 2-2-resistor voltage divider circuit; 2-3-voltage detecting circuit;
3-warning circuit; 4-earth's surface; 5-concrete layer;
6-subtube; 7-water delivery main pipeline.
Embodiment
A kind of buried type water supply pipe leak detecting device as shown in Figure 1 and Figure 2, comprise the leakage gauge head 1 be embedded in leak water detdction district and the Leak testtion circuit 2 connected with leakage gauge head 1, the humidity detecting gauge head of described leakage gauge head 1 for detecting the soil body humidity at installation position place of institute.Described leakage gauge head 1 comprises two are all coated with isolation layer wire in parallel laying and outside, two described wires are respectively the first wire 1-1 and the second wire 1-2, described first wire 1-1 is laid with multiple first conductiving point 1-11 from front to back, described first conductiving point 1-11 be by the first wire 1-1 outside isolation layer remove after formed bare spots.Described second wire 1-2 is laid with multiple second conductiving point 1-21 from front to back, described second conductiving point 1-21 be by the second wire 1-2 outside isolation layer remove after formed bare spots.Multiple described first conductiving point 1-11 and multiple described second conductiving point 1-21 is in being laid staggeredly.Described Leak testtion circuit 2 is the resistance value testing circuit detected the resistance between the first wire 1-1 and the second wire 1-2.Wherein, water supply pipe to be detected is be buried in the water pipe in described buried object, and described buried object is be embedded in water supply pipe to be detected buries thing, as the soil body, concrete etc.
In the present embodiment, the upper end of described first wire 1-1 and the second wire 1-2 all extend out to outside described leak water detdction district, and the lower end of described first wire 1-1 is a first conductiving point 1-11, and the lower end of the second wire 1-2 is a second conductiving point 1-21.
During actual laying, the quantity that the need in described leak water detdction district carry out the water supply pipe to be detected of Leak testtion is one or more, and described water supply pipe to be detected is imbed the pipe section in leak water detdction district.In the present embodiment, the quantity of the water supply pipe to be detected in described leak water detdction district is n, and wherein n is positive integer and n > 3.
When the quantity of the water supply pipe to be detected in described leak water detdction district is one, described first wire 1-1 and the second wire 1-2 are all parallel with described water supply pipe to be detected, and the first wire 1-1 and the spacing between the second wire 1-2 and described water supply pipe to be detected are 5cm ~ 10cm; When the quantity of the water supply pipe to be detected in described leak water detdction district is multiple, the distance between described first wire 1-1 and the second wire 1-2 and multiple described water supply pipe to be detected is all not more than D, and wherein D is 8cm ~ 20cm.In the present embodiment, when the quantity of the water supply pipe to be detected in described leak water detdction district is multiple, multiple described water supply pipe to be detected is parallel laying.
Described leakage gauge head 1 is gauge head water supply pipe to be detected being carried out to leak water detdction, outside described water supply pipe to be detected, set quantity of leaking gauge head 1 is one or more, and multiple described leakage gauge head 1 is laid from front to back along the bearing of trend of described water supply pipe to be detected.
In the present embodiment, outside described water supply pipe to be detected, set quantity of leaking gauge head 1 is one.That is, n described water supply pipe to be detected respectively uses one to leak gauge head 1, and thus the quantity of described leakage gauge head 1 is n.
During actual use, the present invention adopt that to leak the laying mode of gauge head 1 very flexible, both a leakage gauge head 1 can be shared by multiple water supply pipe to be detected, also multiple leakage gauge head 1 can be used by a water supply pipe to be detected, laying mode is very flexible, can according to actual needs, lay flexibly.In the present embodiment, described water supply pipe to be detected is positioned at concrete layer 5.
As shown in Figure 2, n described water supply pipe to be detected is in the vertical subtube 6 to laying, the individual described subtube 6 of n all connects with the water delivery main pipeline 7 be positioned at above earth's surface 4 and it is all positioned at concrete layer 5, is n described subtube 6 water delivery by water delivery main pipeline 7.The side of n described water supply pipe to be detected is all embedded with one and leaks gauge head 1, two wires of each leakage gauge head 1 are provided with m conductiving point, and wherein in each leakage gauge head 1, the upper end of two described wires is the connecting end connected with Leak testtion circuit 2.
Actual when burying underground, multiple described first conductiving point 1-11 and multiple described second conductiving point 1-21 is all in evenly laying, and the spacing between adjacent two the described first conductiving point 1-11 in front and back and between adjacent two the described second conductiving point 1-21 in front and back is 15cm ~ 25cm; Spacing between described first wire 1-1 and the second wire 1-2 is 10cm ~ 20cm.
In the present embodiment, spacing between adjacent two the described first conductiving point 1-11 in front and back and between adjacent two the described second conductiving point 1-21 in front and back is 20cm, and each first conductiving point 1-11 and the spacing before and after it between adjacent two described second conductiving point 1-21 are 10cm.
In actual using process, respectively leak water detdction is carried out to n described subtube 6 by n described leakage gauge head 1.Two described wires of n described leakage gauge head 1 are provided with m the first conductiving point 1-11 and m the second conductiving point 1-21, and m the first conductiving point 1-11 and m second conductiving point 1-21 is all positioned at concrete layer 5, wherein m is positive integer and m is not less than 3.
In the present embodiment, n described subtube 6 be respectively the first subtube, the second subtube ..., the n-th subtube, n described leakage gauge head 1 be respectively to the first subtube, the second subtube ..., the n-th subtube carry out leak water detdction first leak gauge head, second leak gauge head ..., n-th leak gauge head.
Composition graphs 3, the voltage detecting circuit 2-3 that described Leak testtion circuit 2 comprises power circuit 2-1, the resistor voltage divider circuit 2-2 connected with power circuit 2-1 and connects with resistor voltage divider circuit 2-2, described resistor voltage divider circuit 2-2 is connected in series by testing resistance and divider resistance and forms, and described testing resistance is the resistance between the first wire 1-1 and the second wire 1-2.
In the present embodiment, resistance R2 represents the resistance in the first leakage gauge head between two wires, and the first upper end of leaking two wires in gauge head is connected to two terminal of resistance R2 respectively; Resistance R4 represents the resistance in the second leakage gauge head between two wires, and the second upper end of leaking two wires in gauge head is connected to two terminal of resistance R4 respectively; By that analogy, resistance R2n represents the resistance in the n-th leakage gauge head between two wires, and the n-th upper end of leaking two wires in gauge head is connected to two terminal of resistance R2n respectively.
In the present embodiment, described power circuit 2-1 is DC electrical source, and the positive pole of described DC electrical source meets the first wire 1-1, the second wire 1-2 ground connection after described divider resistance, the minus earth of described DC electrical source; Described voltage detecting circuit 2-3 is comparator, and the wiring point between described second wire 1-2 and described divider resistance connects the normal phase input end of described comparator, inverting input ground connection after resistance R09 of described comparator.
In the present embodiment, described power circuit 2-1 comprises transformer T1, bridge rectifier D1 and three terminal regulator 7809, the AC220V power supply inputted by plug Z1 is after switch S and safety fuse cutout F1 (electric current is 0.5A and its voltage is 220V), for transformer T1 provides the interchange input electricity of AC220V, and after transformer T1, export the Ac of 12V, the 12V Ac exported is by bridge rectifier D1 and mutually and after the wave filter C1 connect and C2 filtering, obtain the DC electrical source of 12V, 12V direct current exports DC9V burning voltage after being input to three terminal regulator 7809, for subsequent conditioning circuit provides stable 9V VDC after electric capacity C3 filtering, light emitting diode D2 is the tutorial light of power circuit work.
During physical cabling, two output terminals of the second siding ring of transformer T1 connect with two ac input ends of bridge rectifier D1 respectively, the negative output terminal ground connection of bridge rectifier D1 and its positive output end divides three tunnels, one tunnel is ground connection after electric capacity C1, another road is ground connection after electric capacity C2,3rd tunnel connects the Vin pin of three terminal regulator 7809, and the GND pin ground connection of three terminal regulator 7809 and its Vout pin are the positive output end of 9V VDC.Ground connection after the Vout pipe foot meridian capacitor C3 of three terminal regulator 7809, electric capacity C3 is connected to light emitting diode D2 and resistance R1.
In the present embodiment, described resistor voltage divider circuit 2-2 is all identical with the quantity of leaking gauge head 1 with the quantity of described comparator and its quantity is n.Described comparator is chip LM324.
N described resistor voltage divider circuit 2-2 be respectively the first resistor voltage divider circuit, the second resistor voltage divider circuit ..., the n-th resistor voltage divider circuit, wherein the first resistor voltage divider circuit is connected in series by resistance R2 and resistance R3 and forms, wiring point between resistance R2 and resistance R3 connects with the normal phase input end of chip U1, the Vout pin of the power supply termination three terminal regulator 7809 of chip U1; Second resistor voltage divider circuit is connected in series by resistance R4 and resistance R5 and forms, and the wiring point between resistance R4 and resistance R5 connects with the normal phase input end of chip U2, the Vout pin of the power supply termination three terminal regulator 7809 of chip U2; By that analogy, n-th resistor voltage divider circuit is connected in series by resistance R2n and resistance R (2n+1) and forms, wiring point between resistance R2n and resistance R (2n+1) connects with the normal phase input end of chip Un, the Vout pin of the power supply termination three terminal regulator 7809 of chip Un, described chip U1, chip U2 ..., chip Un is chip LM324, chip U1, chip U2 ..., chip Un reversed-phase output be divided into two-way, one tunnel is ground connection after resistance R09, and another road connects the Vout pin of three terminal regulator 7809 after slide rheostat R01 and resistance R02.Correspondingly, n described comparator be respectively the first comparator, the 2nd comparator ..., the n-th comparator.
In actual using process, the comparator that integrated operatinoal amplifier LM324 works alone as four, respectively four detection voltages leaking gauge head 1 correspondences and setting voltage are compared, specifically: resistance R2 and resistance R3 series connection carries out dividing potential drop to 9V voltage, (9 × R3)/(R2+R3) V voltage is linked into the positive input terminal of the first comparator; Resistance R01, R02 and R09 series connection carries out dividing potential drop to 9V voltage, and (9 × R09)/(R01+R02+R09) V voltage is linked into the negative input end of the first comparator as the setting comparing voltage value of leak water detdction; During actual use, as the first leak water detdction district leaks, the resistance value of then corresponding resistance R2 diminishes to cause and detects voltage (9 × R3)/(R2+R3) V higher than setting voltage (9 × R09)/(R01+R02+R09) V, now the first comparator exports high level, otherwise the first comparator exports zero-level.Equally, the leak water detdction principle in other leak water detdction district is identical, the positive input terminal institute input voltage of the second comparator is (9 × R5)/(R4+R5) V, by that analogy, setting voltage (9 × R09)/(R01+R02+R09) V on the positive input terminal institute input voltage of the n-th comparator to be the negative input end of [9 × R (2n+1)]/[R2n+R (2n+1)] V, n described comparator be all same road.
In the present embodiment, R3=R5=... ,=R (2n+1)=100k Ω, R09=100k Ω, R02=40k Ω, R01 is the adjustable resistance of 10k Ω, leak in Ze Ge leak water detdction district resistance R2 corresponding to gauge head 1, R4 ... if, the resistance value of R2n in 0 ~ (R02+R01) scope time, comparator corresponding to this leak water detdction district exports high level, on the contrary output low level.
Meanwhile, buried type water supply pipe leak detecting device of the present invention, also comprises the warning circuit 3 connected with Leak testtion circuit 2; The quantity of described Leak testtion circuit 2 is one or more, and multiple described Leak testtion circuit 2 all connects with warning circuit 3.
In the present embodiment, described warning circuit 3 comprises the optical alarm circuit connected with Leak testtion circuit 2 and the sound alarm circuit connected with described optical alarm circuit, the quantity of described optical alarm circuit is identical with the quantity of Leak testtion circuit 2, and the quantity of described sound alarm circuit is one.
The voltage-stabiliser tube that described optical alarm circuit comprises a light emitting diode and connects with described light emitting diode, described sound alarm circuit comprises triode Q1, loudspeaker LS1 and music chip CK9561.
In the present embodiment, the quantity of described optical alarm circuit is identical with the quantity of leaking gauge head 1 and its quantity is n.N described optical alarm circuit be respectively the first optical alarm circuit, the second optical alarm circuit ..., the n-th optical alarm circuit, wherein the first optical alarm circuit voltage-stabiliser tube D21 of comprising light emitting diode D11 and connecting with light emitting diode D11, the voltage-stabiliser tube D22 that second optical alarm circuit comprises light emitting diode D12 and connects with light emitting diode D12, by that analogy, the n-th optical alarm circuit voltage-stabiliser tube D2n of comprising light emitting diode D1n and connecting with light emitting diode D1n.The output terminal of described first comparator connects with resistance R06 after light emitting diode D11 and voltage-stabiliser tube D21, the output terminal of described second comparator connects with resistance R06 after light emitting diode D12 and voltage-stabiliser tube D22, by that analogy, the output terminal of the n-th comparator connects with resistance R06 after light emitting diode D1n and voltage-stabiliser tube D2n, resistance R06 connects with the base stage of triode Q1, the base stage of triode Q1 divides two-way, one tunnel ground connection and another road ground connection after resistance R07 after electric capacity C4, the collector electrode of triode Q1 connects the Vout pin of three terminal regulator 7809 after resistance R03.
The emitter of triode Q1 divides two-way, and a road connects with '+' pin of music chip CK9561, and another road connects with the negative electrode of voltage-stabiliser tube D9; The anode of voltage-stabiliser tube D9 divides two-way, one tunnel ground connection and its another road connect with '-' pin of music chip CK9561, resistance R04 is connected between two osc pins of music chip CK9561, the o/p pin of music chip CK9561 connects with the base stage of triode Q2, the emitter of triode Q2 meets loudspeaker LS1 after slide rheostat R05, and the collector electrode of triode Q2 connects the Vout pin of three terminal regulator 7809.
During actual use, light emitting diode D11, light emitting diode D12 ..., light emitting diode D1n is respectively the water leakage alarm tutorial light in n leak water detdction district, voltage-stabiliser tube D21, voltage-stabiliser tube D22 ..., voltage-stabiliser tube D2n effect be for preventing the output voltage of each comparator from influencing each other.
When certain leak water detdction district leaks, the resistance value of carrying out this district in the leakage gauge head 1 of leak water detdction between two wires is reduced in 0 ~ (R02+R01) scope, in Leak testtion circuit 2 to should district comparator export high level, make triode Q1 conducting, and driving music chip CK9561 to work, chip CK9561 output terminal o/p amplifies rear driving loudspeaker LS1 through triode Q2 and to sound warning; Otherwise when neither one leak water detdction district leaks, the voltage of n comparator output is all not enough to make triode Q1 work, and warning circuit 3 is not reported to the police.In described warning circuit 3, slide rheostat R05 connects with loudspeaker LS1, regulates the resistance value of slide rheostat R05 can regulate the size of alarm sound.In warning circuit 3, electric capacity C4 filters the interference of extraneous high frequency to subsequent amplification circuitry as wave filter, and the discharge loop that during power-off, R07 and electric capacity C4 forms bleeds off the energy stored in electric capacity C4.
Meanwhile, the invention also discloses a kind of buried type water supply pipe leakage detection method, comprise the following steps:
Step one, leakage gauge head are buried underground: while burying underground water supply pipe to be detected, subterranean zone residing for water supply pipe to be detected is divided into one or more leak water detdction district, and in each leak water detdction district, bury one respectively underground leak gauge head 1, and by bury underground and leak the upper end of two wires in gauge head 1 and all lead to outside earth's surface 4.
Step 2, Leak testtion circuit connect: by two wires of each leakage gauge head 1 buried underground in step one, be connected respectively with Leak testtion circuit 2; Now, Leak testtion circuit 2 detects that the resistance in each leakage gauge head 1 between two wires is mega-ohms.
Step 3, leak water detdction: in water supply pipe using process to be detected described in step one, carry out leak water detdction by Leak testtion circuit 2 respectively to each leak water detdction district, and the leakage detection method in all leak water detdction districts is all identical.
When leak water detdction is carried out to any one leak water detdction district, by Leak testtion circuit 2, the resistance in the leakage gauge head 1 be laid in this leak water detdction district between two wires is detected: when detect show that the resistance leaked in gauge head 1 between two wires is decreased to kilo-ohm level time, illustrate that this leak water detdction district exists water leakage situation.
In the present embodiment, described water supply pipe to be detected is embedded in building, therefore parallelly in the leak water detdction district that water supply pipe to be detected is other bury two wires with isolation layer underground, and be staggered in respectively on two wires multiple exposed metallic conduction point is set.
During actual use, the resistance value between two wires laid in same leak water detdction district is as testing signal, and when pipeline is water-tight, between two wires, very greatly (being generally all greater than M Ω level), now the present invention's resistance value does not report to the police; Leak when pipeline exists, the mixed earth around leakage point is invaded wet, is buried in resistance value between two wires in mixed earth and diminishes (being generally 10k about Ω), the bright and warning of sounding of the tutorial light in the corresponding leak water detdction district of now the present invention.
To sum up, when the present invention carries out Leak testtion to pipeline, hygrometry is adopted to detect: when pipeline occurs to leak, the concrete humidity of pipeline changes, detect resistance value when mixing clay and drying by experiment and be greater than M Ω level, when mixed earth immersion becomes wet, resistance becomes 10k about Ω.Thus, the present invention adopts top to be provided with two of the multiple metallic conduction point wires in parallel laying as the leakage gauge head 1 detected humidity.Being embedded in by the water supply pipe to be detected in building, bury underground and leak gauge head 1, and the extraction ground (wire being drawn the part on ground without metallic conduction point) of will leak on two wires of gauge head 1, reflected the change of concrete humidity by the resistance value of leaking in gauge head 1 between two wires, and then pipe leakage is detected.During actual use, when the leak water detdction district of correspondence does not leak, the resistance value of leaking in gauge head 1 between two wires is very large; Otherwise when occurring leaking, the resistance value of leaking in gauge head 1 between two wires is varied down to 10k about Ω.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. a buried type water supply pipe leak detecting device, it is characterized in that: comprise the leakage gauge head (1) be embedded in leak water detdction district and the Leak testtion circuit (2) connected with leakage gauge head (1), the humidity detecting gauge head of described leakage gauge head (1) for detecting the buried object humidity at installation position place of institute; Described leakage gauge head (1) comprises two are all coated with isolation layer wire in parallel laying and outside, two described wires are respectively the first wire (1-1) and the second wire (1-2), described first wire (1-1) is laid with multiple first conductiving point (1-11) from front to back, and described first conductiving point (1-11) is the bare spots formed after being removed by the isolation layer in the first wire (1-1) outside; Described second wire (1-2) is laid with multiple second conductiving point (1-21) from front to back, and described second conductiving point (1-21) is the bare spots formed after being removed by the isolation layer in the second wire (1-2) outside; Multiple described first conductiving point (1-11) and multiple described second conductiving point (1-21) are in being laid staggeredly; Described Leak testtion circuit (2) is the resistance value testing circuit detected the resistance between the first wire (1-1) and the second wire (1-2).
2. according to a kind of buried type water supply pipe leak detecting device according to claim 1, it is characterized in that: the upper end of described first wire (1-1) and the second wire (1-2) all extend out to outside described leak water detdction district, the lower end of described first wire (1-1) is first conductiving point (1-11), and the lower end of the second wire (1-2) is second conductiving point (1-21).
3. according to a kind of buried type water supply pipe leak detecting device described in claim 1 or 2, it is characterized in that: the quantity that the need in described leak water detdction district carry out the water supply pipe to be detected of Leak testtion is one or more, and described water supply pipe to be detected is imbed the pipe section in leak water detdction district.
4. according to a kind of buried type water supply pipe leak detecting device according to claim 3, it is characterized in that: when the quantity of the water supply pipe to be detected in described leak water detdction district is one, described first wire (1-1) and the second wire (1-2) are all parallel with described water supply pipe to be detected, and the first wire (1-1) and the spacing between the second wire (1-2) and described water supply pipe to be detected are 5cm ~ 10cm; When the quantity of the water supply pipe to be detected in described leak water detdction district is multiple, described first wire (1-1) and the distance between the second wire (1-2) and multiple described water supply pipe to be detected are all not more than D, and wherein D is 8cm ~ 20cm.
5. according to a kind of buried type water supply pipe leak detecting device described in claim 1 or 2, it is characterized in that: described leakage gauge head (1) is gauge head water supply pipe to be detected being carried out to leak water detdction, outside described water supply pipe to be detected, set quantity of leaking gauge head (1) is one or more, and multiple described leakage gauge head (1) is laid from front to back along the bearing of trend of described water supply pipe to be detected.
6. according to a kind of buried type water supply pipe leak detecting device described in claim 1 or 2, it is characterized in that: the voltage detecting circuit (2-3) that described Leak testtion circuit (2) comprises power circuit (2-1), the resistor voltage divider circuit (2-2) connected with power circuit (2-1) and connects with resistor voltage divider circuit (2-2), described resistor voltage divider circuit (2-2) is connected in series by testing resistance and divider resistance and forms, and described testing resistance is the resistance between the first wire (1-1) and the second wire (1-2).
7. according to a kind of buried type water supply pipe leak detecting device according to claim 6, it is characterized in that: described power circuit (2-1) is DC electrical source, the positive pole of described DC electrical source connects the first wire (1-1), second wire (1-2) ground connection after described divider resistance, the minus earth of described DC electrical source; Described voltage detecting circuit (2-3) is comparator, and the wiring point between described second wire (1-2) and described divider resistance connects the normal phase input end of described comparator, inverting input ground connection after resistance R09 of described comparator.
8. according to a kind of buried type water supply pipe leak detecting device described in claim 1 or 2, it is characterized in that: also comprise the warning circuit (3) connected with Leak testtion circuit (2); The quantity of described Leak testtion circuit (2) is one or more, and multiple described Leak testtion circuit (2) all connects with warning circuit (3);
Described warning circuit (3) comprises the optical alarm circuit connected with Leak testtion circuit (2) and the sound alarm circuit connected with described optical alarm circuit, the quantity of described optical alarm circuit is identical with the quantity of Leak testtion circuit (2), and the quantity of described sound alarm circuit is one.
9. according to a kind of buried type water supply pipe leak detecting device described in claim 1 or 2, it is characterized in that: multiple described first conductiving point (1-11) and multiple described second conductiving point (1-21) are all in evenly laying, and the spacing between adjacent two described first conductiving points (1-11) in front and back and between adjacent two described second conductiving points (1-21) in front and back is 15cm ~ 25cm; Spacing between described first wire (1-1) and the second wire (1-2) is 10cm ~ 20cm.
10. utilize leak detecting device as claimed in claim 1 water supply pipe to be carried out to a method for Leak testtion, it is characterized in that the method comprises the following steps:
Step one, leakage gauge head are buried underground: while burying underground water supply pipe to be detected, subterranean zone residing for water supply pipe to be detected is divided into one or more leak water detdction district, and in each leak water detdction district, bury one respectively underground leak gauge head (1), and by bury the upper end of leaking two wires in gauge head (1) underground and all lead to outside, earth's surface (4);
Step 2, Leak testtion circuit connect: by two wires of each leakage gauge head (1) buried underground in step one, be connected respectively with Leak testtion circuit (2); Now, Leak testtion circuit (2) detects that the resistance in each leakage gauge head (1) between two wires is mega-ohms;
Step 3, leak water detdction: in water supply pipe using process to be detected described in step one, carry out leak water detdction by Leak testtion circuit (2) respectively to each leak water detdction district, and the leakage detection method in all leak water detdction districts is all identical;
When leak water detdction is carried out to any one leak water detdction district, by Leak testtion circuit (2), the resistance in the leakage gauge head (1) be laid in this leak water detdction district between two wires is detected: when detection show that the resistance leaked in gauge head (1) between two wires is decreased to kilo-ohm level, illustrate that this leak water detdction district exists water leakage situation.
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